diff --git a/CMakeLists.txt b/CMakeLists.txt index 77888f5..c451033 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -1,10 +1,13 @@ cmake_minimum_required(VERSION 3.7) -project(OpenGLPlayground) +project(MingeCraft) set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} CMakeModules/) -cmake_policy(SET CMP0037 OLD) +<<<<<<< HEAD set(CMAKE_BUILD_TYPE Debug) +======= +# set(CMAKE_BUILD_TYPE Debug) +>>>>>>> dev set(CMAKE_CXX_FLAGS "-Ofast") set(executable output) diff --git a/src/common.hpp b/src/common.hpp deleted file mode 100644 index fae97b2..0000000 --- a/src/common.hpp +++ /dev/null @@ -1,23 +0,0 @@ -#ifndef MINECRAFT_COMMON_H_ -#define MINECRAFT_COMMON_H_ - -#include -#include -#include -#include - -#include -#include - -#include -#include -#include -#include - -#if _WIN32 -#include -#else -#include -#endif - -#endif diff --git a/src/config.hpp b/src/config.hpp deleted file mode 100644 index ca4aea7..0000000 --- a/src/config.hpp +++ /dev/null @@ -1,16 +0,0 @@ -#ifndef MINECRAFT_CONFIG_H_ -#define MINECRAFT_CONFIG_H_ - -#include "common.hpp" - -class Config { -public: - - std::string ResourceBase = MC_RESOURCES; - // std::string ResourceBase = "E:/Games/minecraft/resources/"; - -}; - -static Config GameConfig; - -#endif diff --git a/src/game.cpp b/src/game.cpp deleted file mode 100644 index 03feba9..0000000 --- a/src/game.cpp +++ /dev/null @@ -1,184 +0,0 @@ -#include "game.hpp" - -// For glm::vec2 as the key of a hashmap -#define GLM_ENABLE_EXPERIMENTAL - -#define LOGGER_DEFINITION -#include - -#include "renderer/renderer.hpp" -#include "renderer/texture.hpp" -#include "renderer/shader.hpp" -#include "renderer/camera.hpp" - -#include "world/chunk/chunk.hpp" -#include "world/entity.hpp" -#include "world/world.hpp" -#include "world/block.hpp" - -#include "common.hpp" -#include "config.hpp" - - -Game::Game() { - -} - -void Game::Setup(int w, int h) { - - m_logger = std::make_shared(); - - *m_logger << "----------------" << LOGGER_ENDL; - *m_logger << "Minecraft 1.14.2" << LOGGER_ENDL; - *m_logger << "----------------" << LOGGER_ENDL; - *m_logger << LOGGER_ENDL; - -#ifdef __DEBUG - *m_logger << LOGGER_DEBUG << "Debug mode enabled" << LOGGER_ENDL; -#endif - - *m_logger << LOGGER_INFO << "Initializing display" << LOGGER_ENDL; - SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO); - - SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8); - SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8); - SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8); - SDL_GL_SetAttribute(SDL_GL_ALPHA_SIZE, 8); - SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, 32); - SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); - - SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1); - SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 4); - - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4); - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 5); - - // Create GL window - *m_logger << LOGGER_INFO << "Creating window" << LOGGER_ENDL; - m_window = SDL_CreateWindow("Minecraft 1.14.2", - SDL_WINDOWPOS_CENTERED, - SDL_WINDOWPOS_CENTERED, w, h, - SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE); - - // Create GL context - *m_logger << LOGGER_INFO << "Creating OpenGL context" << LOGGER_ENDL; - m_glContext = SDL_GL_CreateContext(m_window); - - SDL_SetRelativeMouseMode(SDL_TRUE); - - // Set VSYNC swap interval - SDL_GL_SetSwapInterval(1); - - *m_logger << LOGGER_INFO << "Display set up" << LOGGER_ENDL; - - // Load OpenGL - gladLoadGLLoader(SDL_GL_GetProcAddress); - glEnable(GL_MULTISAMPLE); - // glEnable(GL_CULL_FACE); - glCullFace(GL_BACK); - glEnable(GL_DEPTH_TEST); - // glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); - - *m_logger << LOGGER_INFO << "Loaded OpenGL" << LOGGER_ENDL; - *m_logger << LOGGER_ENDL; - IsDisplayOpen = true; - - std::shared_ptr playercamera = std::make_shared(w, h); - m_player = std::make_shared(glm::vec3(0), glm::vec3(0), playercamera); - - std::shared_ptr BlockDictionary = CBlockDictionary::GetInstance(); - - BlockDictionary->Build(); - - m_world = std::make_shared(); - - Texture texture; - m_world->SetTextureMap(texture.LoadTextures(BlockDictionary->Textures)); - - m_world->LoadWorld(); - -} - -void Game::Input(SDL_Event* e) { - - Uint8* state = (Uint8*)SDL_GetKeyboardState(NULL); - - while (SDL_PollEvent(e)) { - - - switch (e->type) { - - case SDL_KEYDOWN: - { - - if (e->key.keysym.sym == SDLK_ESCAPE) { - - IsMouseActive = !IsMouseActive; - - if (IsMouseActive) - SDL_SetRelativeMouseMode(SDL_TRUE); - else - SDL_SetRelativeMouseMode(SDL_FALSE); - - } - - break; - - } - - case SDL_WINDOWEVENT: - { - - if (e->window.event == SDL_WINDOWEVENT_RESIZED) { - - m_player->CameraUpdateProjection(e->window.data1, e->window.data2); - glViewport(0, 0, e->window.data1, e->window.data2); - - } - - break; - - } - - case SDL_QUIT: - { - - IsDisplayOpen = false; - - break; - - } - - } - - if (IsMouseActive) m_player->HandleMouseSDL(*e); - - } - - m_player->MoveSDL(state); - -} - -void Game::Run() { - - SDL_Event e; - - const float clear[] = { 186.0f / 255.0f, 214.0f / 255.0f, 254.0f / 255.0f }; - - m_renderer = std::make_unique(); - - while (IsDisplayOpen) { - - Input(&e); - - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glClearBufferfv(GL_COLOR, 0, clear); - - m_world->Update(m_player); - m_renderer->Render(m_world, m_player); - - SDL_GL_SwapWindow(m_window); - - } - -} diff --git a/src/game.hpp b/src/game.hpp deleted file mode 100644 index daee357..0000000 --- a/src/game.hpp +++ /dev/null @@ -1,55 +0,0 @@ -#ifndef MINECRAFT_GAME_H_ -#define MINECRAFT_GAME_H_ - -#ifdef NDEBUG -#define __DEBUG -#endif - -#define __DEBUG -// #define __IMGUI - -#include -#include -#include - -#if _WIN32 -#include -#else -#include -#endif - -class Logger; - -class Renderer; -class Camera; - -class Player; -class World; - -class Game { -public: - Game(); - - void Setup(int w, int h); - - void Input(SDL_Event* e); - - void Run(); - - bool IsDisplayOpen = false; - bool IsMouseActive = true; - -private: - SDL_Window* m_window = nullptr; - SDL_GLContext m_glContext = nullptr; - - std::shared_ptr m_logger; - - std::shared_ptr m_renderer; - std::shared_ptr m_world; - - std::shared_ptr m_player; - -}; - -#endif diff --git a/src/main.cpp b/src/main.cpp deleted file mode 100644 index 03951d5..0000000 --- a/src/main.cpp +++ /dev/null @@ -1,14 +0,0 @@ -#include - -#include "game.hpp" - - -int main(int argc, char** argv) { - - Game game; - game.Setup(1080, 720); - game.Run(); - - return 0; - -} diff --git a/src/physics/collider.cpp b/src/physics/collider.cpp deleted file mode 100644 index 07fda40..0000000 --- a/src/physics/collider.cpp +++ /dev/null @@ -1,35 +0,0 @@ -#include "collider.hpp" - -EntityCollider::EntityCollider() { - -} - -glm::vec3 EntityCollider::TerrainCollide(std::vector terrain) { - - - -} - -bool EntityCollider::m_aabb(ColliderBox a, ColliderBox b) { - - return { - (a.Min.x <= b.Min.x + b.Max.x && a.Min.x + a.Max.x >= b.Min.x) && - (a.Min.y <= b.Min.y + b.Max.y && a.Min.y + a.Max.y >= b.Min.y) && - (a.Min.z <= b.Min.z + b.Max.z && a.Min.z + a.Max.z >= b.Min.z) - }; - -} - -float EntityCollider::m_xDepth(ColliderBox a, ColliderBox b) { - -} - - -float EntityCollider::m_yDepth(ColliderBox a, ColliderBox b) { - -} - - -float EntityCollider::m_zDepth(ColliderBox a, ColliderBox b) { - -} diff --git a/src/physics/collider.hpp b/src/physics/collider.hpp deleted file mode 100644 index 49e24f6..0000000 --- a/src/physics/collider.hpp +++ /dev/null @@ -1,39 +0,0 @@ -#ifndef MINECRAFT_PHYSICS_COLLIDER_H_ -#define MINECRAFT_PHYSICS_COLLIDER_H_ - -#include "../common.hpp" - -class ColliderBox { -public: - glm::vec3 Min; - glm::vec3 Max; -}; - -class Collider : public ColliderBox { -public: - -}; - -// TODO: Trees -class EntityCollider { -public: - - EntityCollider(); - - // Surrounding blocks indexed XYZ - // Returns point of collision - glm::vec3 TerrainCollide(std::vector surroundingBlocks); - - ColliderBox Bounds; - -private: - - bool m_aabb(ColliderBox a, ColliderBox b); - - float m_xDepth(ColliderBox a, ColliderBox b); - float m_yDepth(ColliderBox a, ColliderBox b); - float m_zDepth(ColliderBox a, ColliderBox b); - -}; - -#endif diff --git a/src/renderer/camera.cpp b/src/renderer/camera.cpp deleted file mode 100644 index 9c55d62..0000000 --- a/src/renderer/camera.cpp +++ /dev/null @@ -1,191 +0,0 @@ -#include "camera.hpp" - -Camera::Camera() { - - projMatrix = glm::perspective(glm::radians(45.0f), 1.0f, 0.1f, 1000.0f); - - Roll = 0.0f; - Pitch = 0.0f; - Yaw = 0.0f; - - Position = {}; - LookDirection = {}; - - viewMatrix = {}; - - UpdateView(); - -} - -Camera::Camera(int w, int h) { - - projMatrix = glm::perspective(glm::radians(45.0f), (float)w / float(h), 0.1f, 1000.0f); - - Roll = 0.0f; - Pitch = 0.0f; - Yaw = 0.0f; - - Position = {}; - LookDirection = {}; - - viewMatrix = {}; - - UpdateView(); - -} - -void Camera::UpdateView() { - - // roll can be removed - glm::mat4 matRoll = glm::mat4(1.0f); //identity matrix; - glm::mat4 matPitch = glm::mat4(1.0f);//identity matrix - glm::mat4 matYaw = glm::mat4(1.0f); //identity matrix - - // roll, pitch and yaw - matRoll = glm::rotate(matRoll, Roll, glm::vec3(0.0f, 0.0f, 1.0f)); - matPitch = glm::rotate(matPitch, Pitch, glm::vec3(1.0f, 0.0f, 0.0f)); - matYaw = glm::rotate(matYaw, Yaw, glm::vec3(0.0f, 1.0f, 0.0f)); - - glm::mat4 rotate = matRoll * matPitch * matYaw; - - glm::mat4 translate = glm::mat4(1.0f); - translate = glm::translate(translate, -Position); - - viewMatrix = rotate * translate; - - // Work out Look Vector - glm::mat4 inverseView = glm::inverse(viewMatrix); - - LookDirection.x = inverseView[2][0]; - LookDirection.y = inverseView[2][1]; - LookDirection.z = inverseView[2][2]; - -} - -glm::mat4 Camera::GetViewMatrix() { - - return viewMatrix; - -} - -glm::mat4 Camera::GetProjectionMatrix() { - - return projMatrix; - -} - -void Camera::UpdateProjection(int width, int height) { - - projMatrix = glm::perspective(glm::radians(45.0f), (float)width / (float)height, 0.1f, 1000.0f); - -} - -void Camera::HandleMouse(SDL_Event e) { - - if (e.type != SDL_MOUSEMOTION) - return; - - - float mouseDX = e.motion.xrel; - float mouseDY = e.motion.yrel; - - glm::vec2 mouseDelta{ mouseDX, mouseDY }; - - MouseMoved(mouseDelta); - -} - -void Camera::MoveCamera(Uint8* state) { - - float dx = 0; - float dz = 0; - float dy = 0; - - // Rotate by camera direction - glm::mat2 rotate { - cos(Yaw), -sin(Yaw), - sin(Yaw), cos(Yaw) - }; - - glm::vec2 f(0.0, 1.0); - f = f * rotate; - - if (state[SDL_SCANCODE_W]) { - dz -= f.y; - dx -= f.x; - } - if (state[SDL_SCANCODE_S]) { - dz += f.y; - dx += f.x; - } - if (state[SDL_SCANCODE_A]) { - dz += f.x; - dx += -f.y; - } - if (state[SDL_SCANCODE_D]) { - dz -= f.x; - dx -= -f.y; - } - if (state[SDL_SCANCODE_SPACE]) { - dy += 1; - } - if (state[SDL_SCANCODE_LSHIFT]) { - dy -= 1; - } - - // get current view matrix - glm::mat4 mat = GetViewMatrix(); - glm::vec3 forward(mat[0][2], mat[1][2], mat[2][2]); - glm::vec3 strafe(mat[0][0], mat[1][0], mat[2][0]); - - // forward vector must be negative to look forward. - // read :http://in2gpu.com/2015/05/17/view-matrix/ - Position.x += dx * CameraSpeed; - Position.z += dz * CameraSpeed; - Position.y += dy * CameraSpeed; - - // update the view matrix - UpdateView(); - -} - -void Camera::MouseMoved(glm::vec2 mouseDelta) { - - // note that yaw and pitch must be converted to radians. - // this is done in UpdateView() by glm::rotate - Yaw += MouseSensitivity * (mouseDelta.x/100); - Pitch += MouseSensitivity * (mouseDelta.y/100); - Pitch = glm::clamp(Pitch, -M_PI/2, M_PI/2); - - UpdateView(); - -} - -void Camera::UpdatePosition(glm::vec3 position) { - - Position = position; - - UpdateView(); - -} - -void Camera::UpdateEulerLookDirection(float roll, float pitch, float yaw) { - - Roll = roll; Pitch = pitch; Yaw = yaw; - LookDirection.x = cos(Yaw) * cos(Pitch); - LookDirection.y = sin(Yaw) * cos(Pitch); - LookDirection.z = sin(Pitch); - - UpdateView(); - -} - -void Camera::UpdateLookDirection(glm::vec3 lookDirection) { - - LookDirection = lookDirection; - Pitch = asin(-lookDirection.y); - Yaw = atan2(lookDirection.x, lookDirection.z); - - UpdateView(); - -} diff --git a/src/renderer/camera.hpp b/src/renderer/camera.hpp deleted file mode 100644 index acbe1a0..0000000 --- a/src/renderer/camera.hpp +++ /dev/null @@ -1,45 +0,0 @@ -#ifndef MINECRAFT_RENDERER_CAMERA_H_ -#define MINECRAFT_RENDERER_CAMERA_H_ - -#include "../common.hpp" - -class Camera { -public: - Camera(); - Camera(int w, int h); - - void UpdateView(); - - glm::mat4 GetViewMatrix(); - glm::mat4 GetProjectionMatrix(); - glm::mat4 GetFrustrumMatrix(); - - void UpdateProjection(int width, int height); - - // Keyboard - void MoveCamera(Uint8* state); - // Mouse - void HandleMouse(SDL_Event e); - // Mouse Delta - void MouseMoved(glm::vec2 mouseDelta); - - // Updatable by - float MouseSensitivity = 0.1f; - float CameraSpeed = 2.0f; - - void UpdatePosition(glm::vec3 position); - void UpdateEulerLookDirection(float roll, float pitch, float yaw); - void UpdateLookDirection(glm::vec3 lookDirection); - - glm::vec3 Position = {}; - float Roll, Pitch, Yaw; - glm::vec3 LookDirection = {}; - -private: - - glm::mat4 viewMatrix = {}; - glm::mat4 projMatrix = {}; - -}; - -#endif diff --git a/src/renderer/frustrum.cpp b/src/renderer/frustrum.cpp deleted file mode 100644 index 43a2d1a..0000000 --- a/src/renderer/frustrum.cpp +++ /dev/null @@ -1,3 +0,0 @@ -#include "frustrum.hpp" - - diff --git a/src/renderer/frustrum.hpp b/src/renderer/frustrum.hpp deleted file mode 100644 index cefa7e6..0000000 --- a/src/renderer/frustrum.hpp +++ /dev/null @@ -1,35 +0,0 @@ -#ifndef MINECRAFT_RENDERER_FRUSTRUM_H_ -#define MINECRAFT_RENDERER_FRUSTRUM_H_ - -#include "../common.hpp" - -namespace EFrustrumPlanes { - - enum Planes { - - Right, - Left, - Top, - Bottom, - Far, - Near - - }; - -}; - -class FrustrumPlane { -public: - - - -}; - -class Frustrum { -public: - - - -}; - -#endif diff --git a/src/renderer/renderer.cpp b/src/renderer/renderer.cpp deleted file mode 100644 index f927606..0000000 --- a/src/renderer/renderer.cpp +++ /dev/null @@ -1,16 +0,0 @@ -#include "renderer.hpp" - -#include "../world/chunk/chunk.hpp" -#include "../world/world.hpp" -#include "shader.hpp" - -Renderer::Renderer() { - -} - -// Perform the render passes -void Renderer::Render(std::shared_ptr world, std::shared_ptr entity) { - - world->Render(entity); - -} diff --git a/src/renderer/renderer.hpp b/src/renderer/renderer.hpp deleted file mode 100644 index 3edbec3..0000000 --- a/src/renderer/renderer.hpp +++ /dev/null @@ -1,18 +0,0 @@ -#ifndef MINECRAFT_RENDERER_RENDERER_H_ -#define MINECRAFT_RENDERER_RENDERER_H_ - -#include "../common.hpp" - -class Entity; -class World; - -// Does GL render passes then returns to the game loop -class Renderer { -public: - Renderer(); - - void Render(std::shared_ptr world, std::shared_ptr entity); - -}; - -#endif diff --git a/src/renderer/shader.cpp b/src/renderer/shader.cpp deleted file mode 100644 index c5ae645..0000000 --- a/src/renderer/shader.cpp +++ /dev/null @@ -1,109 +0,0 @@ -#include "shader.hpp" - -Shader::Shader() - : m_fileReader() { - - Program = 0; - m_frag = 0; - m_vert = 0; - - m_logger = std::make_shared(); - -} - - -void Shader::Load(std::string path) { - - std::string vertexLocation = path + ".vert"; - Load(vertexLocation, GL_VERTEX_SHADER); - *m_logger << LOGGER_INFO << "Vertex shader at '" << vertexLocation << "' loaded..." << LOGGER_ENDL; - - - std::string fragmentLocation = path + ".frag"; - Load(fragmentLocation, GL_FRAGMENT_SHADER); - *m_logger << LOGGER_INFO << "Fragment shader at '" << fragmentLocation << "' loaded..." << LOGGER_ENDL; - -} - - -void Shader::Load(std::string path, GLenum type) { - - GLuint activeShader = 0; - - if (type == GL_VERTEX_SHADER) - m_vert = activeShader = glCreateShader(type); - - if (type == GL_FRAGMENT_SHADER) - m_frag = activeShader = glCreateShader(type); - - std::string loadedShaderSource = m_fileReader.LoadTextFromFile(path); - const char* shaderSource = loadedShaderSource.c_str(); - int shaderSourceLength = loadedShaderSource.length(); - - glShaderSource(activeShader, 1, &shaderSource, &shaderSourceLength); - -} - -void Shader::Link() { - - if (m_vert == 0 || m_frag == 0) { - *m_logger << LOGGER_ERROR << "Failed to link programs: Both programs not present" << LOGGER_ENDL; - return; - } - - glCompileShader(m_vert); - if (m_CheckShader(m_vert)) { - *m_logger << LOGGER_INFO << "Vertex shader '" << m_vert << "' compiled..." << LOGGER_ENDL; - } - - glCompileShader(m_frag); - if (m_CheckShader(m_frag)) { - *m_logger << LOGGER_INFO << "Fragment shader '" << m_frag << "' compiled..." << LOGGER_ENDL; - } - - Program = glCreateProgram(); - - glAttachShader(Program, m_vert); - glAttachShader(Program, m_frag); - - glLinkProgram(Program); - - glDeleteShader(m_vert); - glDeleteShader(m_frag); - - *m_logger << LOGGER_INFO << "Program '" << Program << "' loaded..." << LOGGER_ENDL; - -} - -void Shader::Use() { - - glUseProgram(Program); - -} - - -bool Shader::m_CheckShader(GLuint uid) { - - GLint status = GL_TRUE; - - glGetShaderiv(uid, GL_COMPILE_STATUS, &status); - - if (status == GL_FALSE) { - char buf[512]; - glGetShaderInfoLog(uid, 512, NULL, buf); - *m_logger << LOGGER_ERROR << buf << LOGGER_ENDL; - delete buf; - return false; - } - - return true; -} - - -Shader::~Shader() { - - glDeleteProgram(Program); - glDeleteShader(m_vert); - glDeleteShader(m_frag); - -} diff --git a/src/renderer/shader.hpp b/src/renderer/shader.hpp deleted file mode 100644 index 02e68d1..0000000 --- a/src/renderer/shader.hpp +++ /dev/null @@ -1,33 +0,0 @@ -#ifndef MINECRAFT_RENDERER_SHADER_H_ -#define MINECRAFT_RENDERER_SHADER_H_ - -#include - -#include "../util/filereader.hpp" -#include "../common.hpp" - -class Shader { -public: - Shader(); - - void Load(std::string path); - void Load(std::string path, GLenum type); - - GLuint Program; - void Link(); - - void Use(); - - ~Shader(); -private: - std::shared_ptr m_logger; - - bool m_CheckShader(GLuint uid); - - FileReader m_fileReader; - - GLuint m_vert; - GLuint m_frag; -}; - -#endif diff --git a/src/renderer/texture.cpp b/src/renderer/texture.cpp deleted file mode 100644 index ac70556..0000000 --- a/src/renderer/texture.cpp +++ /dev/null @@ -1,60 +0,0 @@ -#include "texture.hpp" - -#include - -#include "../config.hpp" - -#define STB_IMAGE_IMPLEMENTATION -#include "../util/stb_image.hpp" - -GLuint Texture::LoadTextures(std::vector textures) { - - Logger logger; - - std::string basePath = GameConfig.ResourceBase + "textures/"; - - int x = 16; - int y = 16; - - GLsizei layers = textures.size(); - GLubyte* texels = (GLubyte*)malloc(x * y * 4 * layers * sizeof(GLubyte)); - - for (int i = 0; i < layers; i++) { - - std::string path = basePath + textures[i]; - - int xR = 0; - int yR = 0; - int cR = 0; - - unsigned char* texture = stbi_load(path.c_str(), &xR, &yR, &cR, STBI_rgb_alpha); - - memcpy(texels + (i * x * y * 4), texture, x * y * 4); - - stbi_image_free(texture); - logger << LOGGER_INFO << "Texture at '" << path << "' Loaded..." << LOGGER_ENDL; - - } - - GLuint textureArray = 0; - - glGenTextures(1, &textureArray); - glBindTexture(GL_TEXTURE_2D_ARRAY, textureArray); - - glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA8, x, y, layers, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL); - - glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, 0, x, y, layers, GL_RGBA, GL_UNSIGNED_BYTE, texels); - - glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - - glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - glTexParameteri(GL_TEXTURE_2D_ARRAY, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - - glBindTexture(GL_TEXTURE_2D_ARRAY, 0); - - free(texels); - - return textureArray; - -} diff --git a/src/renderer/texture.hpp b/src/renderer/texture.hpp deleted file mode 100644 index b83300f..0000000 --- a/src/renderer/texture.hpp +++ /dev/null @@ -1,11 +0,0 @@ -#ifndef MINECRAFT_RENDERER_TEXTURE_H_ -#define MINECRAFT_RENDERER_TEXTURE_H_ - -#include "../common.hpp" - -class Texture { -public: - GLuint LoadTextures(std::vector textures); -}; - -#endif diff --git a/src/util/fastnoise.cpp b/src/util/fastnoise.cpp deleted file mode 100644 index 4fdba6b..0000000 --- a/src/util/fastnoise.cpp +++ /dev/null @@ -1,2250 +0,0 @@ -// FastNoise.cpp -// -// MIT License -// -// Copyright(c) 2017 Jordan Peck -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files(the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions : -// -// The above copyright notice and this permission notice shall be included in all -// copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -// SOFTWARE. -// -// The developer's email is jorzixdan.me2@gzixmail.com (for great email, take -// off every 'zix'.) -// - -#include "fastnoise.hpp" - -#include -#include - -#include -#include - -const FN_DECIMAL GRAD_X[] = -{ - 1, -1, 1, -1, - 1, -1, 1, -1, - 0, 0, 0, 0 -}; -const FN_DECIMAL GRAD_Y[] = -{ - 1, 1, -1, -1, - 0, 0, 0, 0, - 1, -1, 1, -1 -}; -const FN_DECIMAL GRAD_Z[] = -{ - 0, 0, 0, 0, - 1, 1, -1, -1, - 1, 1, -1, -1 -}; - -const FN_DECIMAL GRAD_4D[] = -{ - 0,1,1,1,0,1,1,-1,0,1,-1,1,0,1,-1,-1, - 0,-1,1,1,0,-1,1,-1,0,-1,-1,1,0,-1,-1,-1, - 1,0,1,1,1,0,1,-1,1,0,-1,1,1,0,-1,-1, - -1,0,1,1,-1,0,1,-1,-1,0,-1,1,-1,0,-1,-1, - 1,1,0,1,1,1,0,-1,1,-1,0,1,1,-1,0,-1, - -1,1,0,1,-1,1,0,-1,-1,-1,0,1,-1,-1,0,-1, - 1,1,1,0,1,1,-1,0,1,-1,1,0,1,-1,-1,0, - -1,1,1,0,-1,1,-1,0,-1,-1,1,0,-1,-1,-1,0 -}; - -const FN_DECIMAL VAL_LUT[] = -{ - FN_DECIMAL(0.3490196078), FN_DECIMAL(0.4352941176), FN_DECIMAL(-0.4509803922), FN_DECIMAL(0.6392156863), FN_DECIMAL(0.5843137255), FN_DECIMAL(-0.1215686275), FN_DECIMAL(0.7176470588), FN_DECIMAL(-0.1058823529), FN_DECIMAL(0.3960784314), FN_DECIMAL(0.0431372549), FN_DECIMAL(-0.03529411765), FN_DECIMAL(0.3176470588), FN_DECIMAL(0.7254901961), FN_DECIMAL(0.137254902), FN_DECIMAL(0.8588235294), FN_DECIMAL(-0.8196078431), - FN_DECIMAL(-0.7960784314), FN_DECIMAL(-0.3333333333), FN_DECIMAL(-0.6705882353), FN_DECIMAL(-0.3882352941), FN_DECIMAL(0.262745098), FN_DECIMAL(0.3254901961), FN_DECIMAL(-0.6470588235), FN_DECIMAL(-0.9215686275), FN_DECIMAL(-0.5294117647), FN_DECIMAL(0.5294117647), FN_DECIMAL(-0.4666666667), FN_DECIMAL(0.8117647059), FN_DECIMAL(0.3803921569), FN_DECIMAL(0.662745098), FN_DECIMAL(0.03529411765), FN_DECIMAL(-0.6156862745), - FN_DECIMAL(-0.01960784314), FN_DECIMAL(-0.3568627451), FN_DECIMAL(-0.09019607843), FN_DECIMAL(0.7490196078), FN_DECIMAL(0.8352941176), FN_DECIMAL(-0.4039215686), FN_DECIMAL(-0.7490196078), FN_DECIMAL(0.9529411765), FN_DECIMAL(-0.0431372549), FN_DECIMAL(-0.9294117647), FN_DECIMAL(-0.6549019608), FN_DECIMAL(0.9215686275), FN_DECIMAL(-0.06666666667), FN_DECIMAL(-0.4431372549), FN_DECIMAL(0.4117647059), FN_DECIMAL(-0.4196078431), - FN_DECIMAL(-0.7176470588), FN_DECIMAL(-0.8117647059), FN_DECIMAL(-0.2549019608), FN_DECIMAL(0.4901960784), FN_DECIMAL(0.9137254902), FN_DECIMAL(0.7882352941), FN_DECIMAL(-1.0), FN_DECIMAL(-0.4745098039), FN_DECIMAL(0.7960784314), FN_DECIMAL(0.8509803922), FN_DECIMAL(-0.6784313725), FN_DECIMAL(0.4588235294), FN_DECIMAL(1.0), FN_DECIMAL(-0.1843137255), FN_DECIMAL(0.4509803922), FN_DECIMAL(0.1450980392), - FN_DECIMAL(-0.231372549), FN_DECIMAL(-0.968627451), FN_DECIMAL(-0.8588235294), FN_DECIMAL(0.4274509804), FN_DECIMAL(0.003921568627), FN_DECIMAL(-0.003921568627), FN_DECIMAL(0.2156862745), FN_DECIMAL(0.5058823529), FN_DECIMAL(0.7647058824), FN_DECIMAL(0.2078431373), FN_DECIMAL(-0.5921568627), FN_DECIMAL(0.5764705882), FN_DECIMAL(-0.1921568627), FN_DECIMAL(-0.937254902), FN_DECIMAL(0.08235294118), FN_DECIMAL(-0.08235294118), - FN_DECIMAL(0.9058823529), FN_DECIMAL(0.8274509804), FN_DECIMAL(0.02745098039), FN_DECIMAL(-0.168627451), FN_DECIMAL(-0.7803921569), FN_DECIMAL(0.1137254902), FN_DECIMAL(-0.9450980392), FN_DECIMAL(0.2), FN_DECIMAL(0.01960784314), FN_DECIMAL(0.5607843137), FN_DECIMAL(0.2705882353), FN_DECIMAL(0.4431372549), FN_DECIMAL(-0.9607843137), FN_DECIMAL(0.6156862745), FN_DECIMAL(0.9294117647), FN_DECIMAL(-0.07450980392), - FN_DECIMAL(0.3098039216), FN_DECIMAL(0.9921568627), FN_DECIMAL(-0.9137254902), FN_DECIMAL(-0.2941176471), FN_DECIMAL(-0.3411764706), FN_DECIMAL(-0.6235294118), FN_DECIMAL(-0.7647058824), FN_DECIMAL(-0.8901960784), FN_DECIMAL(0.05882352941), FN_DECIMAL(0.2392156863), FN_DECIMAL(0.7333333333), FN_DECIMAL(0.6549019608), FN_DECIMAL(0.2470588235), FN_DECIMAL(0.231372549), FN_DECIMAL(-0.3960784314), FN_DECIMAL(-0.05098039216), - FN_DECIMAL(-0.2235294118), FN_DECIMAL(-0.3725490196), FN_DECIMAL(0.6235294118), FN_DECIMAL(0.7019607843), FN_DECIMAL(-0.8274509804), FN_DECIMAL(0.4196078431), FN_DECIMAL(0.07450980392), FN_DECIMAL(0.8666666667), FN_DECIMAL(-0.537254902), FN_DECIMAL(-0.5058823529), FN_DECIMAL(-0.8039215686), FN_DECIMAL(0.09019607843), FN_DECIMAL(-0.4823529412), FN_DECIMAL(0.6705882353), FN_DECIMAL(-0.7882352941), FN_DECIMAL(0.09803921569), - FN_DECIMAL(-0.6078431373), FN_DECIMAL(0.8039215686), FN_DECIMAL(-0.6), FN_DECIMAL(-0.3254901961), FN_DECIMAL(-0.4117647059), FN_DECIMAL(-0.01176470588), FN_DECIMAL(0.4823529412), FN_DECIMAL(0.168627451), FN_DECIMAL(0.8745098039), FN_DECIMAL(-0.3647058824), FN_DECIMAL(-0.1607843137), FN_DECIMAL(0.568627451), FN_DECIMAL(-0.9921568627), FN_DECIMAL(0.9450980392), FN_DECIMAL(0.5137254902), FN_DECIMAL(0.01176470588), - FN_DECIMAL(-0.1450980392), FN_DECIMAL(-0.5529411765), FN_DECIMAL(-0.5764705882), FN_DECIMAL(-0.1137254902), FN_DECIMAL(0.5215686275), FN_DECIMAL(0.1607843137), FN_DECIMAL(0.3725490196), FN_DECIMAL(-0.2), FN_DECIMAL(-0.7254901961), FN_DECIMAL(0.631372549), FN_DECIMAL(0.7098039216), FN_DECIMAL(-0.568627451), FN_DECIMAL(0.1294117647), FN_DECIMAL(-0.3098039216), FN_DECIMAL(0.7411764706), FN_DECIMAL(-0.8509803922), - FN_DECIMAL(0.2549019608), FN_DECIMAL(-0.6392156863), FN_DECIMAL(-0.5607843137), FN_DECIMAL(-0.3176470588), FN_DECIMAL(0.937254902), FN_DECIMAL(0.9843137255), FN_DECIMAL(0.5921568627), FN_DECIMAL(0.6941176471), FN_DECIMAL(0.2862745098), FN_DECIMAL(-0.5215686275), FN_DECIMAL(0.1764705882), FN_DECIMAL(0.537254902), FN_DECIMAL(-0.4901960784), FN_DECIMAL(-0.4588235294), FN_DECIMAL(-0.2078431373), FN_DECIMAL(-0.2156862745), - FN_DECIMAL(0.7725490196), FN_DECIMAL(0.3647058824), FN_DECIMAL(-0.2392156863), FN_DECIMAL(0.2784313725), FN_DECIMAL(-0.8823529412), FN_DECIMAL(0.8980392157), FN_DECIMAL(0.1215686275), FN_DECIMAL(0.1058823529), FN_DECIMAL(-0.8745098039), FN_DECIMAL(-0.9843137255), FN_DECIMAL(-0.7019607843), FN_DECIMAL(0.9607843137), FN_DECIMAL(0.2941176471), FN_DECIMAL(0.3411764706), FN_DECIMAL(0.1529411765), FN_DECIMAL(0.06666666667), - FN_DECIMAL(-0.9764705882), FN_DECIMAL(0.3019607843), FN_DECIMAL(0.6470588235), FN_DECIMAL(-0.5843137255), FN_DECIMAL(0.05098039216), FN_DECIMAL(-0.5137254902), FN_DECIMAL(-0.137254902), FN_DECIMAL(0.3882352941), FN_DECIMAL(-0.262745098), FN_DECIMAL(-0.3019607843), FN_DECIMAL(-0.1764705882), FN_DECIMAL(-0.7568627451), FN_DECIMAL(0.1843137255), FN_DECIMAL(-0.5450980392), FN_DECIMAL(-0.4980392157), FN_DECIMAL(-0.2784313725), - FN_DECIMAL(-0.9529411765), FN_DECIMAL(-0.09803921569), FN_DECIMAL(0.8901960784), FN_DECIMAL(-0.2862745098), FN_DECIMAL(-0.3803921569), FN_DECIMAL(0.5529411765), FN_DECIMAL(0.7803921569), FN_DECIMAL(-0.8352941176), FN_DECIMAL(0.6862745098), FN_DECIMAL(0.7568627451), FN_DECIMAL(0.4980392157), FN_DECIMAL(-0.6862745098), FN_DECIMAL(-0.8980392157), FN_DECIMAL(-0.7725490196), FN_DECIMAL(-0.7098039216), FN_DECIMAL(-0.2470588235), - FN_DECIMAL(-0.9058823529), FN_DECIMAL(0.9764705882), FN_DECIMAL(0.1921568627), FN_DECIMAL(0.8431372549), FN_DECIMAL(-0.05882352941), FN_DECIMAL(0.3568627451), FN_DECIMAL(0.6078431373), FN_DECIMAL(0.5450980392), FN_DECIMAL(0.4039215686), FN_DECIMAL(-0.7333333333), FN_DECIMAL(-0.4274509804), FN_DECIMAL(0.6), FN_DECIMAL(0.6784313725), FN_DECIMAL(-0.631372549), FN_DECIMAL(-0.02745098039), FN_DECIMAL(-0.1294117647), - FN_DECIMAL(0.3333333333), FN_DECIMAL(-0.8431372549), FN_DECIMAL(0.2235294118), FN_DECIMAL(-0.3490196078), FN_DECIMAL(-0.6941176471), FN_DECIMAL(0.8823529412), FN_DECIMAL(0.4745098039), FN_DECIMAL(0.4666666667), FN_DECIMAL(-0.7411764706), FN_DECIMAL(-0.2705882353), FN_DECIMAL(0.968627451), FN_DECIMAL(0.8196078431), FN_DECIMAL(-0.662745098), FN_DECIMAL(-0.4352941176), FN_DECIMAL(-0.8666666667), FN_DECIMAL(-0.1529411765), -}; - -const FN_DECIMAL CELL_2D_X[] = -{ - FN_DECIMAL(-0.6440658039), FN_DECIMAL(-0.08028078721), FN_DECIMAL(0.9983546168), FN_DECIMAL(0.9869492062), FN_DECIMAL(0.9284746418), FN_DECIMAL(0.6051097552), FN_DECIMAL(-0.794167404), FN_DECIMAL(-0.3488667991), FN_DECIMAL(-0.943136526), FN_DECIMAL(-0.9968171318), FN_DECIMAL(0.8740961579), FN_DECIMAL(0.1421139764), FN_DECIMAL(0.4282553608), FN_DECIMAL(-0.9986665833), FN_DECIMAL(0.9996760121), FN_DECIMAL(-0.06248383632), - FN_DECIMAL(0.7120139305), FN_DECIMAL(0.8917660409), FN_DECIMAL(0.1094842955), FN_DECIMAL(-0.8730880804), FN_DECIMAL(0.2594811489), FN_DECIMAL(-0.6690063346), FN_DECIMAL(-0.9996834972), FN_DECIMAL(-0.8803608671), FN_DECIMAL(-0.8166554937), FN_DECIMAL(0.8955599676), FN_DECIMAL(-0.9398321388), FN_DECIMAL(0.07615451399), FN_DECIMAL(-0.7147270565), FN_DECIMAL(0.8707354457), FN_DECIMAL(-0.9580008579), FN_DECIMAL(0.4905965632), - FN_DECIMAL(0.786775944), FN_DECIMAL(0.1079711577), FN_DECIMAL(0.2686638979), FN_DECIMAL(0.6113487322), FN_DECIMAL(-0.530770584), FN_DECIMAL(-0.7837268286), FN_DECIMAL(-0.8558691039), FN_DECIMAL(-0.5726093896), FN_DECIMAL(-0.9830740914), FN_DECIMAL(0.7087766359), FN_DECIMAL(0.6807027153), FN_DECIMAL(-0.08864708788), FN_DECIMAL(0.6704485923), FN_DECIMAL(-0.1350735482), FN_DECIMAL(-0.9381333003), FN_DECIMAL(0.9756655376), - FN_DECIMAL(0.4231433671), FN_DECIMAL(-0.4959787385), FN_DECIMAL(0.1005554325), FN_DECIMAL(-0.7645857281), FN_DECIMAL(-0.5859053796), FN_DECIMAL(-0.9751154306), FN_DECIMAL(-0.6972258572), FN_DECIMAL(0.7907012002), FN_DECIMAL(-0.9109899213), FN_DECIMAL(-0.9584307894), FN_DECIMAL(-0.8269529333), FN_DECIMAL(0.2608264719), FN_DECIMAL(-0.7773760119), FN_DECIMAL(0.7606456974), FN_DECIMAL(-0.8961083758), FN_DECIMAL(-0.9838134719), - FN_DECIMAL(0.7338893576), FN_DECIMAL(0.2161226729), FN_DECIMAL(0.673509891), FN_DECIMAL(-0.5512056873), FN_DECIMAL(0.6899744332), FN_DECIMAL(0.868004831), FN_DECIMAL(0.5897430311), FN_DECIMAL(-0.8950444221), FN_DECIMAL(-0.3595752773), FN_DECIMAL(0.8209486981), FN_DECIMAL(-0.2912360132), FN_DECIMAL(-0.9965011374), FN_DECIMAL(0.9766994634), FN_DECIMAL(0.738790822), FN_DECIMAL(-0.4730947722), FN_DECIMAL(0.8946479441), - FN_DECIMAL(-0.6943628971), FN_DECIMAL(-0.6620468182), FN_DECIMAL(-0.0887255502), FN_DECIMAL(-0.7512250855), FN_DECIMAL(-0.5322986898), FN_DECIMAL(0.5226295385), FN_DECIMAL(0.2296318375), FN_DECIMAL(0.7915307344), FN_DECIMAL(-0.2756485999), FN_DECIMAL(-0.6900234522), FN_DECIMAL(0.07090588086), FN_DECIMAL(0.5981278485), FN_DECIMAL(0.3033429312), FN_DECIMAL(-0.7253142797), FN_DECIMAL(-0.9855874307), FN_DECIMAL(-0.1761843396), - FN_DECIMAL(-0.6438468325), FN_DECIMAL(-0.9956136595), FN_DECIMAL(0.8541580762), FN_DECIMAL(-0.9999807666), FN_DECIMAL(-0.02152416253), FN_DECIMAL(-0.8705983095), FN_DECIMAL(-0.1197138014), FN_DECIMAL(-0.992107781), FN_DECIMAL(-0.9091181546), FN_DECIMAL(0.788610536), FN_DECIMAL(-0.994636402), FN_DECIMAL(0.4211256853), FN_DECIMAL(0.3110430857), FN_DECIMAL(-0.4031127839), FN_DECIMAL(0.7610684239), FN_DECIMAL(0.7685674467), - FN_DECIMAL(0.152271555), FN_DECIMAL(-0.9364648723), FN_DECIMAL(0.1681333739), FN_DECIMAL(-0.3567427907), FN_DECIMAL(-0.418445483), FN_DECIMAL(-0.98774778), FN_DECIMAL(0.8705250765), FN_DECIMAL(-0.8911701067), FN_DECIMAL(-0.7315350966), FN_DECIMAL(0.6030885658), FN_DECIMAL(-0.4149130821), FN_DECIMAL(0.7585339481), FN_DECIMAL(0.6963196535), FN_DECIMAL(0.8332685012), FN_DECIMAL(-0.8086815232), FN_DECIMAL(0.7518116724), - FN_DECIMAL(-0.3490535894), FN_DECIMAL(0.6972110903), FN_DECIMAL(-0.8795676928), FN_DECIMAL(-0.6442331882), FN_DECIMAL(0.6610236811), FN_DECIMAL(-0.9853565782), FN_DECIMAL(-0.590338458), FN_DECIMAL(0.09843602117), FN_DECIMAL(0.5646534882), FN_DECIMAL(-0.6023259233), FN_DECIMAL(-0.3539248861), FN_DECIMAL(0.5132728656), FN_DECIMAL(0.9380385118), FN_DECIMAL(-0.7599270056), FN_DECIMAL(-0.7425936564), FN_DECIMAL(-0.6679610562), - FN_DECIMAL(-0.3018497816), FN_DECIMAL(0.814478266), FN_DECIMAL(0.03777430269), FN_DECIMAL(-0.7514235086), FN_DECIMAL(0.9662556939), FN_DECIMAL(-0.4720194901), FN_DECIMAL(-0.435054126), FN_DECIMAL(0.7091901235), FN_DECIMAL(0.929379209), FN_DECIMAL(0.9997434357), FN_DECIMAL(0.8306320299), FN_DECIMAL(-0.9434019629), FN_DECIMAL(-0.133133759), FN_DECIMAL(0.5048413216), FN_DECIMAL(0.3711995273), FN_DECIMAL(0.98552091), - FN_DECIMAL(0.7401857005), FN_DECIMAL(-0.9999981398), FN_DECIMAL(-0.2144033253), FN_DECIMAL(0.4808624681), FN_DECIMAL(-0.413835885), FN_DECIMAL(0.644229305), FN_DECIMAL(0.9626648696), FN_DECIMAL(0.1833665934), FN_DECIMAL(0.5794129), FN_DECIMAL(0.01404446873), FN_DECIMAL(0.4388494993), FN_DECIMAL(0.5213612322), FN_DECIMAL(-0.5281609948), FN_DECIMAL(-0.9745306846), FN_DECIMAL(-0.9904373013), FN_DECIMAL(0.9100232252), - FN_DECIMAL(-0.9914057719), FN_DECIMAL(0.7892627765), FN_DECIMAL(0.3364421659), FN_DECIMAL(-0.9416099764), FN_DECIMAL(0.7802732656), FN_DECIMAL(0.886302871), FN_DECIMAL(0.6524471291), FN_DECIMAL(0.5762186726), FN_DECIMAL(-0.08987644664), FN_DECIMAL(-0.2177026782), FN_DECIMAL(-0.9720345052), FN_DECIMAL(-0.05722538858), FN_DECIMAL(0.8105983127), FN_DECIMAL(0.3410261032), FN_DECIMAL(0.6452309645), FN_DECIMAL(-0.7810612152), - FN_DECIMAL(0.9989395718), FN_DECIMAL(-0.808247815), FN_DECIMAL(0.6370177929), FN_DECIMAL(0.5844658772), FN_DECIMAL(0.2054070861), FN_DECIMAL(0.055960522), FN_DECIMAL(-0.995827561), FN_DECIMAL(0.893409165), FN_DECIMAL(-0.931516824), FN_DECIMAL(0.328969469), FN_DECIMAL(-0.3193837488), FN_DECIMAL(0.7314755657), FN_DECIMAL(-0.7913517714), FN_DECIMAL(-0.2204109786), FN_DECIMAL(0.9955900414), FN_DECIMAL(-0.7112353139), - FN_DECIMAL(-0.7935008741), FN_DECIMAL(-0.9961918204), FN_DECIMAL(-0.9714163995), FN_DECIMAL(-0.9566188669), FN_DECIMAL(0.2748495632), FN_DECIMAL(-0.4681743221), FN_DECIMAL(-0.9614449642), FN_DECIMAL(0.585194072), FN_DECIMAL(0.4532946061), FN_DECIMAL(-0.9916113176), FN_DECIMAL(0.942479587), FN_DECIMAL(-0.9813704753), FN_DECIMAL(-0.6538429571), FN_DECIMAL(0.2923335053), FN_DECIMAL(-0.2246660704), FN_DECIMAL(-0.1800781949), - FN_DECIMAL(-0.9581216256), FN_DECIMAL(0.552215082), FN_DECIMAL(-0.9296791922), FN_DECIMAL(0.643183699), FN_DECIMAL(0.9997325981), FN_DECIMAL(-0.4606920354), FN_DECIMAL(-0.2148721265), FN_DECIMAL(0.3482070809), FN_DECIMAL(0.3075517813), FN_DECIMAL(0.6274756393), FN_DECIMAL(0.8910881765), FN_DECIMAL(-0.6397771309), FN_DECIMAL(-0.4479080125), FN_DECIMAL(-0.5247665011), FN_DECIMAL(-0.8386507094), FN_DECIMAL(0.3901291416), - FN_DECIMAL(0.1458336921), FN_DECIMAL(0.01624613149), FN_DECIMAL(-0.8273199879), FN_DECIMAL(0.5611100679), FN_DECIMAL(-0.8380219841), FN_DECIMAL(-0.9856122234), FN_DECIMAL(-0.861398618), FN_DECIMAL(0.6398413916), FN_DECIMAL(0.2694510795), FN_DECIMAL(0.4327334514), FN_DECIMAL(-0.9960265354), FN_DECIMAL(-0.939570655), FN_DECIMAL(-0.8846996446), FN_DECIMAL(0.7642113189), FN_DECIMAL(-0.7002080528), FN_DECIMAL(0.664508256), -}; -const FN_DECIMAL CELL_2D_Y[] = -{ - FN_DECIMAL(0.7649700911), FN_DECIMAL(0.9967722885), FN_DECIMAL(0.05734160033), FN_DECIMAL(-0.1610318741), FN_DECIMAL(0.371395799), FN_DECIMAL(-0.7961420628), FN_DECIMAL(0.6076990492), FN_DECIMAL(-0.9371723195), FN_DECIMAL(0.3324056156), FN_DECIMAL(0.07972205329), FN_DECIMAL(-0.4857529277), FN_DECIMAL(-0.9898503007), FN_DECIMAL(0.9036577593), FN_DECIMAL(0.05162417479), FN_DECIMAL(-0.02545330525), FN_DECIMAL(-0.998045976), - FN_DECIMAL(-0.7021653386), FN_DECIMAL(-0.4524967717), FN_DECIMAL(-0.9939885256), FN_DECIMAL(-0.4875625128), FN_DECIMAL(-0.9657481729), FN_DECIMAL(-0.7432567015), FN_DECIMAL(0.02515761212), FN_DECIMAL(0.4743044842), FN_DECIMAL(0.5771254669), FN_DECIMAL(0.4449408324), FN_DECIMAL(0.3416365773), FN_DECIMAL(0.9970960285), FN_DECIMAL(0.6994034849), FN_DECIMAL(0.4917517499), FN_DECIMAL(0.286765333), FN_DECIMAL(0.8713868327), - FN_DECIMAL(0.6172387009), FN_DECIMAL(0.9941540269), FN_DECIMAL(0.9632339851), FN_DECIMAL(-0.7913613129), FN_DECIMAL(0.847515538), FN_DECIMAL(0.6211056739), FN_DECIMAL(0.5171924952), FN_DECIMAL(-0.8198283277), FN_DECIMAL(-0.1832084353), FN_DECIMAL(0.7054329737), FN_DECIMAL(0.7325597678), FN_DECIMAL(0.9960630973), FN_DECIMAL(0.7419559859), FN_DECIMAL(0.9908355749), FN_DECIMAL(-0.346274329), FN_DECIMAL(0.2192641299), - FN_DECIMAL(-0.9060627411), FN_DECIMAL(-0.8683346653), FN_DECIMAL(0.9949314574), FN_DECIMAL(-0.6445220433), FN_DECIMAL(-0.8103794704), FN_DECIMAL(-0.2216977607), FN_DECIMAL(0.7168515217), FN_DECIMAL(0.612202264), FN_DECIMAL(-0.412428616), FN_DECIMAL(0.285325116), FN_DECIMAL(0.56227115), FN_DECIMAL(-0.9653857009), FN_DECIMAL(-0.6290361962), FN_DECIMAL(0.6491672535), FN_DECIMAL(0.443835306), FN_DECIMAL(-0.1791955706), - FN_DECIMAL(-0.6792690269), FN_DECIMAL(-0.9763662173), FN_DECIMAL(0.7391782104), FN_DECIMAL(0.8343693968), FN_DECIMAL(0.7238337389), FN_DECIMAL(0.4965557504), FN_DECIMAL(0.8075909592), FN_DECIMAL(-0.4459769977), FN_DECIMAL(-0.9331160806), FN_DECIMAL(-0.5710019572), FN_DECIMAL(0.9566512346), FN_DECIMAL(-0.08357920318), FN_DECIMAL(0.2146116448), FN_DECIMAL(-0.6739348049), FN_DECIMAL(0.8810115417), FN_DECIMAL(0.4467718167), - FN_DECIMAL(-0.7196250184), FN_DECIMAL(-0.749462481), FN_DECIMAL(0.9960561112), FN_DECIMAL(0.6600461127), FN_DECIMAL(-0.8465566164), FN_DECIMAL(-0.8525598897), FN_DECIMAL(-0.9732775654), FN_DECIMAL(0.6111293616), FN_DECIMAL(-0.9612584717), FN_DECIMAL(-0.7237870097), FN_DECIMAL(-0.9974830104), FN_DECIMAL(-0.8014006968), FN_DECIMAL(0.9528814544), FN_DECIMAL(-0.6884178931), FN_DECIMAL(-0.1691668301), FN_DECIMAL(0.9843571905), - FN_DECIMAL(0.7651544003), FN_DECIMAL(-0.09355982605), FN_DECIMAL(-0.5200134429), FN_DECIMAL(-0.006202125807), FN_DECIMAL(-0.9997683284), FN_DECIMAL(0.4919944954), FN_DECIMAL(-0.9928084436), FN_DECIMAL(-0.1253880012), FN_DECIMAL(-0.4165383308), FN_DECIMAL(-0.6148930171), FN_DECIMAL(-0.1034332049), FN_DECIMAL(-0.9070022917), FN_DECIMAL(-0.9503958117), FN_DECIMAL(0.9151503065), FN_DECIMAL(-0.6486716073), FN_DECIMAL(0.6397687707), - FN_DECIMAL(-0.9883386937), FN_DECIMAL(0.3507613761), FN_DECIMAL(0.9857642561), FN_DECIMAL(-0.9342026446), FN_DECIMAL(-0.9082419159), FN_DECIMAL(0.1560587169), FN_DECIMAL(0.4921240607), FN_DECIMAL(-0.453669308), FN_DECIMAL(0.6818037859), FN_DECIMAL(0.7976742329), FN_DECIMAL(0.9098610522), FN_DECIMAL(0.651633524), FN_DECIMAL(0.7177318024), FN_DECIMAL(-0.5528685241), FN_DECIMAL(0.5882467118), FN_DECIMAL(0.6593778956), - FN_DECIMAL(0.9371027648), FN_DECIMAL(-0.7168658839), FN_DECIMAL(-0.4757737632), FN_DECIMAL(0.7648291307), FN_DECIMAL(0.7503650398), FN_DECIMAL(0.1705063456), FN_DECIMAL(-0.8071558121), FN_DECIMAL(-0.9951433815), FN_DECIMAL(-0.8253280792), FN_DECIMAL(-0.7982502628), FN_DECIMAL(0.9352738503), FN_DECIMAL(0.8582254747), FN_DECIMAL(-0.3465310238), FN_DECIMAL(0.65000842), FN_DECIMAL(-0.6697422351), FN_DECIMAL(0.7441962291), - FN_DECIMAL(-0.9533555), FN_DECIMAL(0.5801940659), FN_DECIMAL(-0.9992862963), FN_DECIMAL(-0.659820211), FN_DECIMAL(0.2575848092), FN_DECIMAL(0.881588113), FN_DECIMAL(-0.9004043022), FN_DECIMAL(-0.7050172826), FN_DECIMAL(0.369126382), FN_DECIMAL(-0.02265088836), FN_DECIMAL(0.5568217228), FN_DECIMAL(-0.3316515286), FN_DECIMAL(0.991098079), FN_DECIMAL(-0.863212164), FN_DECIMAL(-0.9285531277), FN_DECIMAL(0.1695539323), - FN_DECIMAL(-0.672402505), FN_DECIMAL(-0.001928841934), FN_DECIMAL(0.9767452145), FN_DECIMAL(-0.8767960349), FN_DECIMAL(0.9103515037), FN_DECIMAL(-0.7648324016), FN_DECIMAL(0.2706960452), FN_DECIMAL(-0.9830446035), FN_DECIMAL(0.8150341657), FN_DECIMAL(-0.9999013716), FN_DECIMAL(-0.8985605806), FN_DECIMAL(0.8533360801), FN_DECIMAL(0.8491442537), FN_DECIMAL(-0.2242541966), FN_DECIMAL(-0.1379635899), FN_DECIMAL(-0.4145572694), - FN_DECIMAL(0.1308227633), FN_DECIMAL(0.6140555916), FN_DECIMAL(0.9417041303), FN_DECIMAL(-0.336705587), FN_DECIMAL(-0.6254387508), FN_DECIMAL(0.4631060578), FN_DECIMAL(-0.7578342456), FN_DECIMAL(-0.8172955655), FN_DECIMAL(-0.9959529228), FN_DECIMAL(-0.9760151351), FN_DECIMAL(0.2348380732), FN_DECIMAL(-0.9983612848), FN_DECIMAL(0.5856025746), FN_DECIMAL(-0.9400538266), FN_DECIMAL(-0.7639875669), FN_DECIMAL(0.6244544645), - FN_DECIMAL(0.04604054566), FN_DECIMAL(0.5888424828), FN_DECIMAL(0.7708490978), FN_DECIMAL(-0.8114182882), FN_DECIMAL(0.9786766212), FN_DECIMAL(-0.9984329822), FN_DECIMAL(0.09125496582), FN_DECIMAL(-0.4492438803), FN_DECIMAL(-0.3636982357), FN_DECIMAL(0.9443405575), FN_DECIMAL(-0.9476254645), FN_DECIMAL(-0.6818676535), FN_DECIMAL(-0.6113610831), FN_DECIMAL(0.9754070948), FN_DECIMAL(-0.0938108173), FN_DECIMAL(-0.7029540015), - FN_DECIMAL(-0.6085691109), FN_DECIMAL(-0.08718862881), FN_DECIMAL(-0.237381926), FN_DECIMAL(0.2913423132), FN_DECIMAL(0.9614872426), FN_DECIMAL(0.8836361266), FN_DECIMAL(-0.2749974196), FN_DECIMAL(-0.8108932717), FN_DECIMAL(-0.8913607575), FN_DECIMAL(0.129255541), FN_DECIMAL(-0.3342637104), FN_DECIMAL(-0.1921249337), FN_DECIMAL(-0.7566302845), FN_DECIMAL(-0.9563164339), FN_DECIMAL(-0.9744358146), FN_DECIMAL(0.9836522982), - FN_DECIMAL(-0.2863615732), FN_DECIMAL(0.8337016872), FN_DECIMAL(0.3683701937), FN_DECIMAL(0.7657119102), FN_DECIMAL(-0.02312427772), FN_DECIMAL(0.8875600535), FN_DECIMAL(0.976642191), FN_DECIMAL(0.9374176384), FN_DECIMAL(0.9515313457), FN_DECIMAL(-0.7786361937), FN_DECIMAL(-0.4538302125), FN_DECIMAL(-0.7685604874), FN_DECIMAL(-0.8940796454), FN_DECIMAL(-0.8512462154), FN_DECIMAL(0.5446696133), FN_DECIMAL(0.9207601495), - FN_DECIMAL(-0.9893091197), FN_DECIMAL(-0.9998680229), FN_DECIMAL(0.5617309299), FN_DECIMAL(-0.8277411985), FN_DECIMAL(0.545636467), FN_DECIMAL(0.1690223212), FN_DECIMAL(-0.5079295433), FN_DECIMAL(0.7685069899), FN_DECIMAL(-0.9630140787), FN_DECIMAL(0.9015219132), FN_DECIMAL(0.08905695279), FN_DECIMAL(-0.3423550559), FN_DECIMAL(-0.4661614943), FN_DECIMAL(-0.6449659371), FN_DECIMAL(0.7139388509), FN_DECIMAL(0.7472809229), -}; -const FN_DECIMAL CELL_3D_X[] = -{ - FN_DECIMAL(0.3752498686), FN_DECIMAL(0.687188096), FN_DECIMAL(0.2248135212), FN_DECIMAL(0.6692006647), FN_DECIMAL(-0.4376476931), FN_DECIMAL(0.6139972552), FN_DECIMAL(0.9494563929), FN_DECIMAL(0.8065108882), FN_DECIMAL(-0.2218812853), FN_DECIMAL(0.8484661167), FN_DECIMAL(0.5551817596), FN_DECIMAL(0.2133903499), FN_DECIMAL(0.5195126593), FN_DECIMAL(-0.6440141975), FN_DECIMAL(-0.5192897331), FN_DECIMAL(-0.3697654077), - FN_DECIMAL(-0.07927779647), FN_DECIMAL(0.4187757321), FN_DECIMAL(-0.750078731), FN_DECIMAL(0.6579554632), FN_DECIMAL(-0.6859803838), FN_DECIMAL(-0.6878407087), FN_DECIMAL(0.9490848347), FN_DECIMAL(0.5795829433), FN_DECIMAL(-0.5325976529), FN_DECIMAL(-0.1363699466), FN_DECIMAL(0.417665879), FN_DECIMAL(-0.9108236468), FN_DECIMAL(0.4438605427), FN_DECIMAL(0.819294887), FN_DECIMAL(-0.4033873915), FN_DECIMAL(-0.2817317705), - FN_DECIMAL(0.3969665622), FN_DECIMAL(0.5323450134), FN_DECIMAL(-0.6833017297), FN_DECIMAL(0.3881436661), FN_DECIMAL(-0.7119144767), FN_DECIMAL(-0.2306979838), FN_DECIMAL(-0.9398873022), FN_DECIMAL(0.1701906676), FN_DECIMAL(-0.4261839496), FN_DECIMAL(-0.003712295499), FN_DECIMAL(-0.734675004), FN_DECIMAL(-0.3195046015), FN_DECIMAL(0.7345307424), FN_DECIMAL(0.9766246496), FN_DECIMAL(-0.02003735175), FN_DECIMAL(-0.4824156342), - FN_DECIMAL(0.4245892007), FN_DECIMAL(0.9072427669), FN_DECIMAL(0.593346808), FN_DECIMAL(-0.8911762541), FN_DECIMAL(-0.7657571834), FN_DECIMAL(-0.5268198896), FN_DECIMAL(-0.8801903279), FN_DECIMAL(-0.6296409617), FN_DECIMAL(-0.09492481344), FN_DECIMAL(-0.4920470525), FN_DECIMAL(0.7307666154), FN_DECIMAL(-0.2514540636), FN_DECIMAL(-0.3356210347), FN_DECIMAL(-0.3522787894), FN_DECIMAL(0.87847885), FN_DECIMAL(-0.7424096346), - FN_DECIMAL(0.5757585274), FN_DECIMAL(0.4519299338), FN_DECIMAL(0.6420368628), FN_DECIMAL(-0.1128478447), FN_DECIMAL(0.499874883), FN_DECIMAL(0.5291681739), FN_DECIMAL(-0.5098837195), FN_DECIMAL(0.5639583502), FN_DECIMAL(-0.8456386526), FN_DECIMAL(-0.9657134875), FN_DECIMAL(-0.576437342), FN_DECIMAL(-0.5666013014), FN_DECIMAL(0.5667702405), FN_DECIMAL(-0.481316582), FN_DECIMAL(0.7313389916), FN_DECIMAL(-0.3805628566), - FN_DECIMAL(-0.6512675909), FN_DECIMAL(-0.2787156951), FN_DECIMAL(0.8648059114), FN_DECIMAL(-0.9730216276), FN_DECIMAL(-0.8335820906), FN_DECIMAL(0.2673159641), FN_DECIMAL(0.231150148), FN_DECIMAL(0.01286214638), FN_DECIMAL(0.6774953261), FN_DECIMAL(0.6542885718), FN_DECIMAL(-0.02545450161), FN_DECIMAL(0.2101238586), FN_DECIMAL(-0.5572105885), FN_DECIMAL(0.813705672), FN_DECIMAL(-0.7546026951), FN_DECIMAL(-0.2502500006), - FN_DECIMAL(-0.9979289381), FN_DECIMAL(0.7024037039), FN_DECIMAL(0.08990874624), FN_DECIMAL(0.8170812432), FN_DECIMAL(0.4226980265), FN_DECIMAL(-0.2442153475), FN_DECIMAL(-0.9183326731), FN_DECIMAL(0.6068222411), FN_DECIMAL(0.818676691), FN_DECIMAL(-0.7236735282), FN_DECIMAL(-0.5383903295), FN_DECIMAL(-0.6269337242), FN_DECIMAL(-0.0939331121), FN_DECIMAL(0.9203878539), FN_DECIMAL(-0.7256396824), FN_DECIMAL(0.6292431149), - FN_DECIMAL(0.4234156978), FN_DECIMAL(0.006685688024), FN_DECIMAL(-0.2598694113), FN_DECIMAL(0.6408036421), FN_DECIMAL(0.05899871622), FN_DECIMAL(0.7090281418), FN_DECIMAL(-0.5905222072), FN_DECIMAL(0.3128214264), FN_DECIMAL(-0.691925826), FN_DECIMAL(0.3634019349), FN_DECIMAL(-0.6772511147), FN_DECIMAL(-0.3204583896), FN_DECIMAL(-0.3906740409), FN_DECIMAL(-0.3342190395), FN_DECIMAL(-0.517779592), FN_DECIMAL(-0.6817711267), - FN_DECIMAL(0.6422383105), FN_DECIMAL(0.4388482478), FN_DECIMAL(0.2968562611), FN_DECIMAL(-0.2019778353), FN_DECIMAL(0.6014865048), FN_DECIMAL(0.9519280722), FN_DECIMAL(0.3398889569), FN_DECIMAL(0.8179709354), FN_DECIMAL(0.2365522154), FN_DECIMAL(0.3262175096), FN_DECIMAL(-0.8060715954), FN_DECIMAL(-0.2068642503), FN_DECIMAL(0.6208057279), FN_DECIMAL(-0.5274282502), FN_DECIMAL(-0.3722334928), FN_DECIMAL(-0.8923412971), - FN_DECIMAL(0.5341834201), FN_DECIMAL(-0.3663701513), FN_DECIMAL(-0.6114600319), FN_DECIMAL(0.5026307556), FN_DECIMAL(0.8396151729), FN_DECIMAL(0.9245042467), FN_DECIMAL(-0.7994843957), FN_DECIMAL(-0.5357200589), FN_DECIMAL(-0.6283359739), FN_DECIMAL(-0.61351886), FN_DECIMAL(-0.875632008), FN_DECIMAL(-0.5278879423), FN_DECIMAL(0.9087491985), FN_DECIMAL(-0.03500215466), FN_DECIMAL(-0.261365798), FN_DECIMAL(-0.579523541), - FN_DECIMAL(-0.3765052689), FN_DECIMAL(-0.74398252), FN_DECIMAL(0.4257318052), FN_DECIMAL(-0.1214508921), FN_DECIMAL(0.8561809753), FN_DECIMAL(0.6802835104), FN_DECIMAL(-0.5452131039), FN_DECIMAL(-0.1997156478), FN_DECIMAL(0.4562348357), FN_DECIMAL(-0.811704301), FN_DECIMAL(0.67793962), FN_DECIMAL(-0.9237819106), FN_DECIMAL(0.6973511259), FN_DECIMAL(-0.5189506), FN_DECIMAL(0.5517320032), FN_DECIMAL(-0.396710831), - FN_DECIMAL(0.5493762815), FN_DECIMAL(-0.2507853002), FN_DECIMAL(0.4788634005), FN_DECIMAL(0.387333516), FN_DECIMAL(-0.2176515694), FN_DECIMAL(0.6749832419), FN_DECIMAL(0.2148283022), FN_DECIMAL(-0.7521815872), FN_DECIMAL(0.4697000159), FN_DECIMAL(0.7890593699), FN_DECIMAL(-0.7606162952), FN_DECIMAL(0.01083397843), FN_DECIMAL(0.5254091908), FN_DECIMAL(-0.6748025877), FN_DECIMAL(0.751091524), FN_DECIMAL(0.05259056135), - FN_DECIMAL(0.01889481232), FN_DECIMAL(-0.6037423727), FN_DECIMAL(-0.6542965129), FN_DECIMAL(0.08873301081), FN_DECIMAL(-0.6191345671), FN_DECIMAL(0.4331858488), FN_DECIMAL(-0.3858351946), FN_DECIMAL(-0.1429059747), FN_DECIMAL(0.4118221036), FN_DECIMAL(-0.6247153214), FN_DECIMAL(-0.611423014), FN_DECIMAL(0.5542939606), FN_DECIMAL(-0.9432768808), FN_DECIMAL(-0.4567870451), FN_DECIMAL(-0.7349133547), FN_DECIMAL(0.399304489), - FN_DECIMAL(-0.7474927672), FN_DECIMAL(0.02589419753), FN_DECIMAL(0.783915821), FN_DECIMAL(0.6138668752), FN_DECIMAL(0.4276376047), FN_DECIMAL(-0.4347886353), FN_DECIMAL(0.02947841302), FN_DECIMAL(-0.833742746), FN_DECIMAL(0.3817221742), FN_DECIMAL(-0.8743368359), FN_DECIMAL(-0.3823443796), FN_DECIMAL(-0.6829243811), FN_DECIMAL(-0.3681903049), FN_DECIMAL(-0.367626833), FN_DECIMAL(-0.434583373), FN_DECIMAL(0.235891995), - FN_DECIMAL(-0.6874880269), FN_DECIMAL(-0.5115661773), FN_DECIMAL(-0.5534962601), FN_DECIMAL(0.5632777056), FN_DECIMAL(0.686191532), FN_DECIMAL(-0.05095871588), FN_DECIMAL(-0.06865785057), FN_DECIMAL(-0.5975288531), FN_DECIMAL(-0.6429790056), FN_DECIMAL(-0.3729361548), FN_DECIMAL(0.2237917666), FN_DECIMAL(0.6046773225), FN_DECIMAL(-0.5041542295), FN_DECIMAL(-0.03972191174), FN_DECIMAL(0.7028828406), FN_DECIMAL(-0.5560856498), - FN_DECIMAL(0.5898328456), FN_DECIMAL(-0.9308076766), FN_DECIMAL(0.4617069864), FN_DECIMAL(0.3190983137), FN_DECIMAL(0.9116567753), FN_DECIMAL(-0.45029554), FN_DECIMAL(0.3346334459), FN_DECIMAL(0.8525005645), FN_DECIMAL(0.2528483381), FN_DECIMAL(-0.8306630147), FN_DECIMAL(-0.6880390622), FN_DECIMAL(0.7448684026), FN_DECIMAL(-0.1963355843), FN_DECIMAL(-0.5900257974), FN_DECIMAL(0.9097057294), FN_DECIMAL(-0.2509196808), -}; -const FN_DECIMAL CELL_3D_Y[] = -{ - FN_DECIMAL(-0.6760585049), FN_DECIMAL(-0.09136176499), FN_DECIMAL(0.1681325679), FN_DECIMAL(-0.6688468686), FN_DECIMAL(-0.4822753902), FN_DECIMAL(-0.7891068824), FN_DECIMAL(-0.1877509944), FN_DECIMAL(0.548470914), FN_DECIMAL(-0.463339443), FN_DECIMAL(-0.4050542082), FN_DECIMAL(0.3218158513), FN_DECIMAL(0.2546493823), FN_DECIMAL(-0.3753271935), FN_DECIMAL(0.4745384887), FN_DECIMAL(0.481254652), FN_DECIMAL(-0.8934416489), - FN_DECIMAL(-0.6737085076), FN_DECIMAL(0.7469917228), FN_DECIMAL(0.3826230411), FN_DECIMAL(0.6751013678), FN_DECIMAL(-0.7248119515), FN_DECIMAL(-0.3224276742), FN_DECIMAL(-0.02076190936), FN_DECIMAL(-0.6404268166), FN_DECIMAL(-0.5292028444), FN_DECIMAL(0.7151414636), FN_DECIMAL(-0.6144655059), FN_DECIMAL(-0.369912124), FN_DECIMAL(0.6942067212), FN_DECIMAL(-0.4481558248), FN_DECIMAL(-0.6366894559), FN_DECIMAL(0.5956568471), - FN_DECIMAL(0.564274539), FN_DECIMAL(0.7145584688), FN_DECIMAL(0.6871918316), FN_DECIMAL(0.5657918509), FN_DECIMAL(-0.6275978114), FN_DECIMAL(0.4146983062), FN_DECIMAL(0.2638993789), FN_DECIMAL(-0.792633138), FN_DECIMAL(0.5706133514), FN_DECIMAL(0.8606546462), FN_DECIMAL(0.6490900316), FN_DECIMAL(-0.8242699196), FN_DECIMAL(0.6765819124), FN_DECIMAL(0.1959534069), FN_DECIMAL(-0.8426769757), FN_DECIMAL(-0.5917672797), - FN_DECIMAL(0.7517364266), FN_DECIMAL(0.03252559226), FN_DECIMAL(0.0883617105), FN_DECIMAL(0.4475064813), FN_DECIMAL(-0.1418643552), FN_DECIMAL(0.7343428473), FN_DECIMAL(0.3870192548), FN_DECIMAL(-0.7716703522), FN_DECIMAL(0.4839898327), FN_DECIMAL(0.7437439055), FN_DECIMAL(-0.5989573348), FN_DECIMAL(-0.8357068955), FN_DECIMAL(0.6086049038), FN_DECIMAL(0.9194627258), FN_DECIMAL(0.4718297238), FN_DECIMAL(-0.2650335884), - FN_DECIMAL(-0.6470352599), FN_DECIMAL(-0.5555181303), FN_DECIMAL(0.1222351235), FN_DECIMAL(0.7802044684), FN_DECIMAL(-0.8636947022), FN_DECIMAL(-0.2341352163), FN_DECIMAL(0.683030874), FN_DECIMAL(-0.5005858287), FN_DECIMAL(0.2334616211), FN_DECIMAL(0.2576877608), FN_DECIMAL(0.6666816727), FN_DECIMAL(-0.7663996863), FN_DECIMAL(0.794201982), FN_DECIMAL(0.6189308788), FN_DECIMAL(0.6071033261), FN_DECIMAL(-0.4206058253), - FN_DECIMAL(-0.3957336915), FN_DECIMAL(-0.8170257484), FN_DECIMAL(-0.1043240417), FN_DECIMAL(0.0002167596213), FN_DECIMAL(0.1816339018), FN_DECIMAL(-0.6838094939), FN_DECIMAL(-0.2495341969), FN_DECIMAL(-0.7116756954), FN_DECIMAL(-0.03361673621), FN_DECIMAL(-0.3350836431), FN_DECIMAL(0.2137186039), FN_DECIMAL(0.2557996786), FN_DECIMAL(0.7490117093), FN_DECIMAL(0.4942936549), FN_DECIMAL(-0.352686853), FN_DECIMAL(-0.3952445435), - FN_DECIMAL(-0.0459964767), FN_DECIMAL(-0.7115787471), FN_DECIMAL(0.08022899756), FN_DECIMAL(0.5362268157), FN_DECIMAL(-0.8258613686), FN_DECIMAL(0.1114171723), FN_DECIMAL(0.3882823051), FN_DECIMAL(-0.7915404457), FN_DECIMAL(0.3250957662), FN_DECIMAL(0.6401346464), FN_DECIMAL(-0.2662724517), FN_DECIMAL(-0.6727907114), FN_DECIMAL(-0.994730818), FN_DECIMAL(-0.3596358977), FN_DECIMAL(0.2344610069), FN_DECIMAL(-0.6645215546), - FN_DECIMAL(-0.7107590611), FN_DECIMAL(-0.4646617327), FN_DECIMAL(0.6717191355), FN_DECIMAL(0.5101893498), FN_DECIMAL(0.1185768238), FN_DECIMAL(0.236005093), FN_DECIMAL(-0.7811024061), FN_DECIMAL(0.5089325193), FN_DECIMAL(0.6073187658), FN_DECIMAL(-0.7930732557), FN_DECIMAL(-0.6822767155), FN_DECIMAL(0.3201532885), FN_DECIMAL(0.7545302807), FN_DECIMAL(0.1072664448), FN_DECIMAL(0.6784033173), FN_DECIMAL(-0.6595924967), - FN_DECIMAL(0.7276509498), FN_DECIMAL(0.5586689436), FN_DECIMAL(-0.6498636788), FN_DECIMAL(0.6789333174), FN_DECIMAL(0.7105966551), FN_DECIMAL(-0.2872214155), FN_DECIMAL(0.496746217), FN_DECIMAL(-0.3880337977), FN_DECIMAL(0.7324070604), FN_DECIMAL(-0.9326634749), FN_DECIMAL(-0.5867839255), FN_DECIMAL(0.8003043651), FN_DECIMAL(-0.1631882481), FN_DECIMAL(-0.6796374681), FN_DECIMAL(-0.8066678503), FN_DECIMAL(0.4238177418), - FN_DECIMAL(0.7715863549), FN_DECIMAL(0.5455367347), FN_DECIMAL(-0.03205115397), FN_DECIMAL(-0.6005545066), FN_DECIMAL(-0.5423640002), FN_DECIMAL(0.3569205906), FN_DECIMAL(-0.582071752), FN_DECIMAL(0.6407354361), FN_DECIMAL(0.7777142984), FN_DECIMAL(-0.09956428618), FN_DECIMAL(0.1100002681), FN_DECIMAL(0.8136349123), FN_DECIMAL(0.2923431904), FN_DECIMAL(0.9735794425), FN_DECIMAL(0.8324974864), FN_DECIMAL(-0.6179617717), - FN_DECIMAL(-0.9248386523), FN_DECIMAL(-0.6448780771), FN_DECIMAL(-0.5274402761), FN_DECIMAL(-0.7862170565), FN_DECIMAL(0.2682099744), FN_DECIMAL(-0.5848777694), FN_DECIMAL(-0.6364561467), FN_DECIMAL(-0.7167402514), FN_DECIMAL(-0.8677012494), FN_DECIMAL(0.4205286707), FN_DECIMAL(-0.7007832749), FN_DECIMAL(0.243272451), FN_DECIMAL(-0.1899846085), FN_DECIMAL(-0.6146124977), FN_DECIMAL(-0.8093357692), FN_DECIMAL(-0.03545096987), - FN_DECIMAL(-0.7191590868), FN_DECIMAL(0.7478645848), FN_DECIMAL(0.3623517328), FN_DECIMAL(0.8436992512), FN_DECIMAL(-0.2445711729), FN_DECIMAL(0.6897356637), FN_DECIMAL(-0.1708070787), FN_DECIMAL(0.4639272368), FN_DECIMAL(-0.7917186656), FN_DECIMAL(0.02980025428), FN_DECIMAL(0.6334156172), FN_DECIMAL(-0.9815544807), FN_DECIMAL(-0.2307217304), FN_DECIMAL(0.1080823318), FN_DECIMAL(0.5167601798), FN_DECIMAL(-0.845120016), - FN_DECIMAL(0.441572562), FN_DECIMAL(0.5876789172), FN_DECIMAL(-0.6365908737), FN_DECIMAL(0.68350166), FN_DECIMAL(0.5849723959), FN_DECIMAL(0.1164114357), FN_DECIMAL(-0.7379813884), FN_DECIMAL(-0.9613237178), FN_DECIMAL(-0.9071943084), FN_DECIMAL(-0.7682111105), FN_DECIMAL(0.639074459), FN_DECIMAL(-0.619358298), FN_DECIMAL(0.2807257131), FN_DECIMAL(-0.01800868791), FN_DECIMAL(0.3776607289), FN_DECIMAL(0.7207567823), - FN_DECIMAL(0.5536661486), FN_DECIMAL(-0.9974053117), FN_DECIMAL(-0.02047200006), FN_DECIMAL(-0.6739453804), FN_DECIMAL(-0.5607471297), FN_DECIMAL(0.8815553192), FN_DECIMAL(0.8275977415), FN_DECIMAL(0.3928902456), FN_DECIMAL(0.550991396), FN_DECIMAL(0.4247623676), FN_DECIMAL(-0.3436948871), FN_DECIMAL(-0.3653537677), FN_DECIMAL(0.3181702902), FN_DECIMAL(-0.6067173171), FN_DECIMAL(-0.8984128477), FN_DECIMAL(0.4220839766), - FN_DECIMAL(0.7238407199), FN_DECIMAL(-0.7766913695), FN_DECIMAL(0.6460037842), FN_DECIMAL(0.2544775664), FN_DECIMAL(0.6488840578), FN_DECIMAL(0.805016833), FN_DECIMAL(-0.9183807036), FN_DECIMAL(0.4144046357), FN_DECIMAL(0.270587208), FN_DECIMAL(-0.8813684494), FN_DECIMAL(0.6985971877), FN_DECIMAL(-0.7795603017), FN_DECIMAL(-0.8624480731), FN_DECIMAL(0.5532697017), FN_DECIMAL(0.711179521), FN_DECIMAL(-0.7798160574), - FN_DECIMAL(0.5225859041), FN_DECIMAL(0.1261859368), FN_DECIMAL(0.3398033582), FN_DECIMAL(-0.7472173667), FN_DECIMAL(-0.4032647119), FN_DECIMAL(-0.4246578154), FN_DECIMAL(0.8481212377), FN_DECIMAL(-0.2144838537), FN_DECIMAL(0.3431714491), FN_DECIMAL(0.5310188231), FN_DECIMAL(0.6682978632), FN_DECIMAL(0.3110433206), FN_DECIMAL(0.9263293599), FN_DECIMAL(-0.6155600569), FN_DECIMAL(0.07169784399), FN_DECIMAL(0.8985888773), -}; -const FN_DECIMAL CELL_3D_Z[] = -{ - FN_DECIMAL(-0.6341391283), FN_DECIMAL(-0.7207118346), FN_DECIMAL(0.9597866014), FN_DECIMAL(0.3237504235), FN_DECIMAL(-0.7588642466), FN_DECIMAL(-0.01782410481), FN_DECIMAL(0.2515593809), FN_DECIMAL(0.2207257205), FN_DECIMAL(-0.8579541106), FN_DECIMAL(0.3406410681), FN_DECIMAL(0.7669470462), FN_DECIMAL(-0.9431957648), FN_DECIMAL(0.7676171537), FN_DECIMAL(-0.6000491115), FN_DECIMAL(-0.7062096948), FN_DECIMAL(0.2550207115), - FN_DECIMAL(0.7347325213), FN_DECIMAL(0.5163625202), FN_DECIMAL(-0.5394270162), FN_DECIMAL(0.3336656285), FN_DECIMAL(-0.0638635111), FN_DECIMAL(-0.6503195787), FN_DECIMAL(0.3143356798), FN_DECIMAL(-0.5039217245), FN_DECIMAL(0.6605180464), FN_DECIMAL(-0.6855479011), FN_DECIMAL(-0.6693185756), FN_DECIMAL(0.1832083647), FN_DECIMAL(-0.5666258437), FN_DECIMAL(0.3576482138), FN_DECIMAL(-0.6571949095), FN_DECIMAL(-0.7522101635), - FN_DECIMAL(-0.7238865886), FN_DECIMAL(0.4538887323), FN_DECIMAL(0.2467106257), FN_DECIMAL(0.7274778869), FN_DECIMAL(0.3151170655), FN_DECIMAL(-0.8802293764), FN_DECIMAL(-0.2167232729), FN_DECIMAL(0.5854637865), FN_DECIMAL(0.7019741052), FN_DECIMAL(0.5091756071), FN_DECIMAL(0.1973189533), FN_DECIMAL(0.46743546), FN_DECIMAL(0.05197599597), FN_DECIMAL(0.088354718), FN_DECIMAL(0.5380464843), FN_DECIMAL(-0.6458224544), - FN_DECIMAL(-0.5045952393), FN_DECIMAL(0.419347884), FN_DECIMAL(0.8000823542), FN_DECIMAL(-0.07445020656), FN_DECIMAL(-0.6272881641), FN_DECIMAL(-0.428020311), FN_DECIMAL(-0.2747382083), FN_DECIMAL(-0.08987283726), FN_DECIMAL(0.8699098354), FN_DECIMAL(0.4524761885), FN_DECIMAL(-0.3274603257), FN_DECIMAL(0.4882262167), FN_DECIMAL(-0.7189983256), FN_DECIMAL(0.1746079907), FN_DECIMAL(0.0751772698), FN_DECIMAL(-0.6152927202), - FN_DECIMAL(0.4998474673), FN_DECIMAL(-0.6979677227), FN_DECIMAL(0.7568667263), FN_DECIMAL(-0.6152612058), FN_DECIMAL(0.06447140991), FN_DECIMAL(-0.8155744872), FN_DECIMAL(-0.5229602449), FN_DECIMAL(0.6567836838), FN_DECIMAL(-0.4799905631), FN_DECIMAL(0.03153534591), FN_DECIMAL(0.4724992466), FN_DECIMAL(-0.3026458097), FN_DECIMAL(-0.2191225827), FN_DECIMAL(-0.620692287), FN_DECIMAL(0.3107552588), FN_DECIMAL(0.8235670294), - FN_DECIMAL(0.6474915988), FN_DECIMAL(-0.5047637941), FN_DECIMAL(0.4911488878), FN_DECIMAL(-0.2307138167), FN_DECIMAL(-0.5216800015), FN_DECIMAL(0.6789305939), FN_DECIMAL(0.9403734863), FN_DECIMAL(0.702390397), FN_DECIMAL(0.7347584625), FN_DECIMAL(0.6779567958), FN_DECIMAL(0.9765635805), FN_DECIMAL(-0.9436177661), FN_DECIMAL(-0.358465925), FN_DECIMAL(-0.3058706624), FN_DECIMAL(0.5533414464), FN_DECIMAL(-0.8838306897), - FN_DECIMAL(0.04496841812), FN_DECIMAL(0.01687374963), FN_DECIMAL(-0.9927133148), FN_DECIMAL(-0.211752318), FN_DECIMAL(0.3732015249), FN_DECIMAL(0.9632990593), FN_DECIMAL(-0.07682417004), FN_DECIMAL(-0.07232213047), FN_DECIMAL(0.4733721775), FN_DECIMAL(0.2579229713), FN_DECIMAL(0.7995216286), FN_DECIMAL(0.3928189967), FN_DECIMAL(0.04107517667), FN_DECIMAL(0.1534542912), FN_DECIMAL(0.6468965045), FN_DECIMAL(0.4030684878), - FN_DECIMAL(-0.5617300988), FN_DECIMAL(-0.885463029), FN_DECIMAL(0.693729985), FN_DECIMAL(-0.5736527866), FN_DECIMAL(-0.9911905409), FN_DECIMAL(-0.66451538), FN_DECIMAL(0.2028855685), FN_DECIMAL(0.8019541421), FN_DECIMAL(-0.3903877149), FN_DECIMAL(-0.4888495114), FN_DECIMAL(-0.2753714057), FN_DECIMAL(-0.8915202143), FN_DECIMAL(0.5273119089), FN_DECIMAL(0.9363714773), FN_DECIMAL(-0.5212228249), FN_DECIMAL(-0.31642672), - FN_DECIMAL(0.2409440761), FN_DECIMAL(-0.703776404), FN_DECIMAL(-0.6996810411), FN_DECIMAL(-0.7058714505), FN_DECIMAL(-0.3650566783), FN_DECIMAL(0.1064744278), FN_DECIMAL(0.7985729102), FN_DECIMAL(0.424680257), FN_DECIMAL(-0.6384535592), FN_DECIMAL(0.1540161646), FN_DECIMAL(-0.07702731943), FN_DECIMAL(-0.5627789132), FN_DECIMAL(-0.7667919169), FN_DECIMAL(-0.509815999), FN_DECIMAL(0.4590525092), FN_DECIMAL(0.1552595611), - FN_DECIMAL(0.345402042), FN_DECIMAL(0.7537656024), FN_DECIMAL(0.7906259247), FN_DECIMAL(-0.6218493452), FN_DECIMAL(0.02979350071), FN_DECIMAL(-0.1337893489), FN_DECIMAL(-0.1483818606), FN_DECIMAL(0.549965562), FN_DECIMAL(0.01882482408), FN_DECIMAL(-0.7833783002), FN_DECIMAL(0.4702855809), FN_DECIMAL(0.2435827372), FN_DECIMAL(0.2978428332), FN_DECIMAL(0.2256499906), FN_DECIMAL(0.4885036897), FN_DECIMAL(0.5312962584), - FN_DECIMAL(0.05401156992), FN_DECIMAL(0.1749922158), FN_DECIMAL(-0.7352273018), FN_DECIMAL(0.6058980284), FN_DECIMAL(0.4416079111), FN_DECIMAL(0.4417378638), FN_DECIMAL(0.5455879807), FN_DECIMAL(-0.6681295324), FN_DECIMAL(0.1973431441), FN_DECIMAL(0.4053292055), FN_DECIMAL(0.2220375492), FN_DECIMAL(0.2957118467), FN_DECIMAL(0.6910913512), FN_DECIMAL(0.5940890106), FN_DECIMAL(-0.2014135283), FN_DECIMAL(-0.9172588213), - FN_DECIMAL(-0.4254361401), FN_DECIMAL(-0.6146586825), FN_DECIMAL(-0.7996193253), FN_DECIMAL(-0.3716777111), FN_DECIMAL(-0.9448876842), FN_DECIMAL(-0.2620349924), FN_DECIMAL(0.9615995749), FN_DECIMAL(-0.4679683524), FN_DECIMAL(0.3905937144), FN_DECIMAL(0.613593722), FN_DECIMAL(0.1422937358), FN_DECIMAL(0.1908754211), FN_DECIMAL(0.8189704912), FN_DECIMAL(-0.7300408736), FN_DECIMAL(-0.4108776451), FN_DECIMAL(-0.5319834504), - FN_DECIMAL(-0.8970265651), FN_DECIMAL(-0.5386359045), FN_DECIMAL(0.4082255906), FN_DECIMAL(0.7245356676), FN_DECIMAL(0.5239080873), FN_DECIMAL(-0.8937552226), FN_DECIMAL(-0.553637673), FN_DECIMAL(0.2354455182), FN_DECIMAL(-0.0860293075), FN_DECIMAL(-0.1399373318), FN_DECIMAL(-0.4666323327), FN_DECIMAL(0.5560157407), FN_DECIMAL(0.1772619533), FN_DECIMAL(-0.8893937725), FN_DECIMAL(-0.5632714576), FN_DECIMAL(-0.5666264959), - FN_DECIMAL(-0.3670263736), FN_DECIMAL(-0.06717242579), FN_DECIMAL(0.6205295181), FN_DECIMAL(-0.4110536264), FN_DECIMAL(0.7090054553), FN_DECIMAL(0.183899597), FN_DECIMAL(-0.5605470555), FN_DECIMAL(0.3879565548), FN_DECIMAL(0.7420893903), FN_DECIMAL(-0.2347595118), FN_DECIMAL(-0.8577217497), FN_DECIMAL(0.6325590203), FN_DECIMAL(-0.8736152276), FN_DECIMAL(0.7048011129), FN_DECIMAL(-0.06317948268), FN_DECIMAL(0.8753285574), - FN_DECIMAL(-0.05843650473), FN_DECIMAL(-0.3674922622), FN_DECIMAL(-0.5256624401), FN_DECIMAL(0.7861039337), FN_DECIMAL(0.3287714416), FN_DECIMAL(0.5910593099), FN_DECIMAL(-0.3896960134), FN_DECIMAL(0.6864605361), FN_DECIMAL(0.7164918431), FN_DECIMAL(-0.290014277), FN_DECIMAL(-0.6796169617), FN_DECIMAL(0.1632515592), FN_DECIMAL(0.04485347486), FN_DECIMAL(0.8320545697), FN_DECIMAL(0.01339408056), FN_DECIMAL(-0.2874989857), - FN_DECIMAL(0.615630723), FN_DECIMAL(0.3430367014), FN_DECIMAL(0.8193658136), FN_DECIMAL(-0.5829600957), FN_DECIMAL(0.07911697781), FN_DECIMAL(0.7854296063), FN_DECIMAL(-0.4107442306), FN_DECIMAL(0.4766964066), FN_DECIMAL(-0.9045999527), FN_DECIMAL(-0.1673856787), FN_DECIMAL(0.2828077348), FN_DECIMAL(-0.5902737632), FN_DECIMAL(-0.321506229), FN_DECIMAL(-0.5224513133), FN_DECIMAL(-0.4090169985), FN_DECIMAL(-0.3599685311), -}; - -static int FastFloor(FN_DECIMAL f) { return (f >= 0 ? (int)f : (int)f - 1); } -static int FastRound(FN_DECIMAL f) { return (f >= 0) ? (int)(f + FN_DECIMAL(0.5)) : (int)(f - FN_DECIMAL(0.5)); } -static int FastAbs(int i) { return abs(i); } -static FN_DECIMAL FastAbs(FN_DECIMAL f) { return fabs(f); } -static FN_DECIMAL Lerp(FN_DECIMAL a, FN_DECIMAL b, FN_DECIMAL t) { return a + t * (b - a); } -static FN_DECIMAL InterpHermiteFunc(FN_DECIMAL t) { return t*t*(3 - 2 * t); } -static FN_DECIMAL InterpQuinticFunc(FN_DECIMAL t) { return t*t*t*(t*(t * 6 - 15) + 10); } -static FN_DECIMAL CubicLerp(FN_DECIMAL a, FN_DECIMAL b, FN_DECIMAL c, FN_DECIMAL d, FN_DECIMAL t) -{ - FN_DECIMAL p = (d - c) - (a - b); - return t * t * t * p + t * t * ((a - b) - p) + t * (c - a) + b; -} - -void FastNoise::SetSeed(int seed) -{ - m_seed = seed; - - std::mt19937_64 gen(seed); - - for (int i = 0; i < 256; i++) - m_perm[i] = i; - - for (int j = 0; j < 256; j++) - { - int rng = (int)(gen() % (256 - j)); - int k = rng + j; - int l = m_perm[j]; - m_perm[j] = m_perm[j + 256] = m_perm[k]; - m_perm[k] = l; - m_perm12[j] = m_perm12[j + 256] = m_perm[j] % 12; - } -} - -void FastNoise::CalculateFractalBounding() -{ - FN_DECIMAL amp = m_gain; - FN_DECIMAL ampFractal = 1.0f; - for (int i = 1; i < m_octaves; i++) - { - ampFractal += amp; - amp *= m_gain; - } - m_fractalBounding = 1.0f / ampFractal; -} - -void FastNoise::SetCellularDistance2Indices(int cellularDistanceIndex0, int cellularDistanceIndex1) -{ - m_cellularDistanceIndex0 = std::min(cellularDistanceIndex0, cellularDistanceIndex1); - m_cellularDistanceIndex1 = std::max(cellularDistanceIndex0, cellularDistanceIndex1); - - m_cellularDistanceIndex0 = std::min(std::max(m_cellularDistanceIndex0, 0), FN_CELLULAR_INDEX_MAX); - m_cellularDistanceIndex1 = std::min(std::max(m_cellularDistanceIndex1, 0), FN_CELLULAR_INDEX_MAX); -} - -void FastNoise::GetCellularDistance2Indices(int& cellularDistanceIndex0, int& cellularDistanceIndex1) const -{ - cellularDistanceIndex0 = m_cellularDistanceIndex0; - cellularDistanceIndex1 = m_cellularDistanceIndex1; -} - -unsigned char FastNoise::Index2D_12(unsigned char offset, int x, int y) const -{ - return m_perm12[(x & 0xff) + m_perm[(y & 0xff) + offset]]; -} -unsigned char FastNoise::Index3D_12(unsigned char offset, int x, int y, int z) const -{ - return m_perm12[(x & 0xff) + m_perm[(y & 0xff) + m_perm[(z & 0xff) + offset]]]; -} -unsigned char FastNoise::Index4D_32(unsigned char offset, int x, int y, int z, int w) const -{ - return m_perm[(x & 0xff) + m_perm[(y & 0xff) + m_perm[(z & 0xff) + m_perm[(w & 0xff) + offset]]]] & 31; -} -unsigned char FastNoise::Index2D_256(unsigned char offset, int x, int y) const -{ - return m_perm[(x & 0xff) + m_perm[(y & 0xff) + offset]]; -} -unsigned char FastNoise::Index3D_256(unsigned char offset, int x, int y, int z) const -{ - return m_perm[(x & 0xff) + m_perm[(y & 0xff) + m_perm[(z & 0xff) + offset]]]; -} -unsigned char FastNoise::Index4D_256(unsigned char offset, int x, int y, int z, int w) const -{ - return m_perm[(x & 0xff) + m_perm[(y & 0xff) + m_perm[(z & 0xff) + m_perm[(w & 0xff) + offset]]]]; -} - -// Hashing -#define X_PRIME 1619 -#define Y_PRIME 31337 -#define Z_PRIME 6971 -#define W_PRIME 1013 - -static FN_DECIMAL ValCoord2D(int seed, int x, int y) -{ - int n = seed; - n ^= X_PRIME * x; - n ^= Y_PRIME * y; - - return (n * n * n * 60493) / FN_DECIMAL(2147483648); -} -static FN_DECIMAL ValCoord3D(int seed, int x, int y, int z) -{ - int n = seed; - n ^= X_PRIME * x; - n ^= Y_PRIME * y; - n ^= Z_PRIME * z; - - return (n * n * n * 60493) / FN_DECIMAL(2147483648); -} -static FN_DECIMAL ValCoord4D(int seed, int x, int y, int z, int w) -{ - int n = seed; - n ^= X_PRIME * x; - n ^= Y_PRIME * y; - n ^= Z_PRIME * z; - n ^= W_PRIME * w; - - return (n * n * n * 60493) / FN_DECIMAL(2147483648); -} - -FN_DECIMAL FastNoise::ValCoord2DFast(unsigned char offset, int x, int y) const -{ - return VAL_LUT[Index2D_256(offset, x, y)]; -} -FN_DECIMAL FastNoise::ValCoord3DFast(unsigned char offset, int x, int y, int z) const -{ - return VAL_LUT[Index3D_256(offset, x, y, z)]; -} - -FN_DECIMAL FastNoise::GradCoord2D(unsigned char offset, int x, int y, FN_DECIMAL xd, FN_DECIMAL yd) const -{ - unsigned char lutPos = Index2D_12(offset, x, y); - - return xd*GRAD_X[lutPos] + yd*GRAD_Y[lutPos]; -} -FN_DECIMAL FastNoise::GradCoord3D(unsigned char offset, int x, int y, int z, FN_DECIMAL xd, FN_DECIMAL yd, FN_DECIMAL zd) const -{ - unsigned char lutPos = Index3D_12(offset, x, y, z); - - return xd*GRAD_X[lutPos] + yd*GRAD_Y[lutPos] + zd*GRAD_Z[lutPos]; -} -FN_DECIMAL FastNoise::GradCoord4D(unsigned char offset, int x, int y, int z, int w, FN_DECIMAL xd, FN_DECIMAL yd, FN_DECIMAL zd, FN_DECIMAL wd) const -{ - unsigned char lutPos = Index4D_32(offset, x, y, z, w) << 2; - - return xd*GRAD_4D[lutPos] + yd*GRAD_4D[lutPos + 1] + zd*GRAD_4D[lutPos + 2] + wd*GRAD_4D[lutPos + 3]; -} - -FN_DECIMAL FastNoise::GetNoise(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - x *= m_frequency; - y *= m_frequency; - z *= m_frequency; - - switch (m_noiseType) - { - case Value: - return SingleValue(0, x, y, z); - case ValueFractal: - switch (m_fractalType) - { - case FBM: - return SingleValueFractalFBM(x, y, z); - case Billow: - return SingleValueFractalBillow(x, y, z); - case RigidMulti: - return SingleValueFractalRigidMulti(x, y, z); - default: - return 0; - } - case Perlin: - return SinglePerlin(0, x, y, z); - case PerlinFractal: - switch (m_fractalType) - { - case FBM: - return SinglePerlinFractalFBM(x, y, z); - case Billow: - return SinglePerlinFractalBillow(x, y, z); - case RigidMulti: - return SinglePerlinFractalRigidMulti(x, y, z); - default: - return 0; - } - case Simplex: - return SingleSimplex(0, x, y, z); - case SimplexFractal: - switch (m_fractalType) - { - case FBM: - return SingleSimplexFractalFBM(x, y, z); - case Billow: - return SingleSimplexFractalBillow(x, y, z); - case RigidMulti: - return SingleSimplexFractalRigidMulti(x, y, z); - default: - return 0; - } - case Cellular: - switch (m_cellularReturnType) - { - case CellValue: - case NoiseLookup: - case Distance: - return SingleCellular(x, y, z); - default: - return SingleCellular2Edge(x, y, z); - } - case WhiteNoise: - return GetWhiteNoise(x, y, z); - case Cubic: - return SingleCubic(0, x, y, z); - case CubicFractal: - switch (m_fractalType) - { - case FBM: - return SingleCubicFractalFBM(x, y, z); - case Billow: - return SingleCubicFractalBillow(x, y, z); - case RigidMulti: - return SingleCubicFractalRigidMulti(x, y, z); - } - default: - return 0; - } -} - -FN_DECIMAL FastNoise::GetNoise(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - switch (m_noiseType) - { - case Value: - return SingleValue(0, x, y); - case ValueFractal: - switch (m_fractalType) - { - case FBM: - return SingleValueFractalFBM(x, y); - case Billow: - return SingleValueFractalBillow(x, y); - case RigidMulti: - return SingleValueFractalRigidMulti(x, y); - } - case Perlin: - return SinglePerlin(0, x, y); - case PerlinFractal: - switch (m_fractalType) - { - case FBM: - return SinglePerlinFractalFBM(x, y); - case Billow: - return SinglePerlinFractalBillow(x, y); - case RigidMulti: - return SinglePerlinFractalRigidMulti(x, y); - } - case Simplex: - return SingleSimplex(0, x, y); - case SimplexFractal: - switch (m_fractalType) - { - case FBM: - return SingleSimplexFractalFBM(x, y); - case Billow: - return SingleSimplexFractalBillow(x, y); - case RigidMulti: - return SingleSimplexFractalRigidMulti(x, y); - } - case Cellular: - switch (m_cellularReturnType) - { - case CellValue: - case NoiseLookup: - case Distance: - return SingleCellular(x, y); - default: - return SingleCellular2Edge(x, y); - } - case WhiteNoise: - return GetWhiteNoise(x, y); - case Cubic: - return SingleCubic(0, x, y); - case CubicFractal: - switch (m_fractalType) - { - case FBM: - return SingleCubicFractalFBM(x, y); - case Billow: - return SingleCubicFractalBillow(x, y); - case RigidMulti: - return SingleCubicFractalRigidMulti(x, y); - } - } - return 0; -} - -// White Noise -FN_DECIMAL FastNoise::GetWhiteNoise(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z, FN_DECIMAL w) const -{ - return ValCoord4D(m_seed, - *reinterpret_cast(&x) ^ (*reinterpret_cast(&x) >> 16), - *reinterpret_cast(&y) ^ (*reinterpret_cast(&y) >> 16), - *reinterpret_cast(&z) ^ (*reinterpret_cast(&z) >> 16), - *reinterpret_cast(&w) ^ (*reinterpret_cast(&w) >> 16)); -} - -FN_DECIMAL FastNoise::GetWhiteNoise(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - return ValCoord3D(m_seed, - *reinterpret_cast(&x) ^ (*reinterpret_cast(&x) >> 16), - *reinterpret_cast(&y) ^ (*reinterpret_cast(&y) >> 16), - *reinterpret_cast(&z) ^ (*reinterpret_cast(&z) >> 16)); -} - -FN_DECIMAL FastNoise::GetWhiteNoise(FN_DECIMAL x, FN_DECIMAL y) const -{ - return ValCoord2D(m_seed, - *reinterpret_cast(&x) ^ (*reinterpret_cast(&x) >> 16), - *reinterpret_cast(&y) ^ (*reinterpret_cast(&y) >> 16)); -} - -FN_DECIMAL FastNoise::GetWhiteNoiseInt(int x, int y, int z, int w) const -{ - return ValCoord4D(m_seed, x, y, z, w); -} - -FN_DECIMAL FastNoise::GetWhiteNoiseInt(int x, int y, int z) const -{ - return ValCoord3D(m_seed, x, y, z); -} - -FN_DECIMAL FastNoise::GetWhiteNoiseInt(int x, int y) const -{ - return ValCoord2D(m_seed, x, y); -} - -// Value Noise -FN_DECIMAL FastNoise::GetValueFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - x *= m_frequency; - y *= m_frequency; - z *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SingleValueFractalFBM(x, y, z); - case Billow: - return SingleValueFractalBillow(x, y, z); - case RigidMulti: - return SingleValueFractalRigidMulti(x, y, z); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleValueFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = SingleValue(m_perm[0], x, y, z); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += SingleValue(m_perm[i], x, y, z) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleValueFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = FastAbs(SingleValue(m_perm[0], x, y, z)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SingleValue(m_perm[i], x, y, z)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleValueFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = 1 - FastAbs(SingleValue(m_perm[0], x, y, z)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SingleValue(m_perm[i], x, y, z))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetValue(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - return SingleValue(0, x * m_frequency, y * m_frequency, z * m_frequency); -} - -FN_DECIMAL FastNoise::SingleValue(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - int x0 = FastFloor(x); - int y0 = FastFloor(y); - int z0 = FastFloor(z); - int x1 = x0 + 1; - int y1 = y0 + 1; - int z1 = z0 + 1; - - FN_DECIMAL xs, ys, zs; - switch (m_interp) - { - case Linear: - xs = x - (FN_DECIMAL)x0; - ys = y - (FN_DECIMAL)y0; - zs = z - (FN_DECIMAL)z0; - break; - case Hermite: - xs = InterpHermiteFunc(x - (FN_DECIMAL)x0); - ys = InterpHermiteFunc(y - (FN_DECIMAL)y0); - zs = InterpHermiteFunc(z - (FN_DECIMAL)z0); - break; - case Quintic: - xs = InterpQuinticFunc(x - (FN_DECIMAL)x0); - ys = InterpQuinticFunc(y - (FN_DECIMAL)y0); - zs = InterpQuinticFunc(z - (FN_DECIMAL)z0); - break; - } - - FN_DECIMAL xf00 = Lerp(ValCoord3DFast(offset, x0, y0, z0), ValCoord3DFast(offset, x1, y0, z0), xs); - FN_DECIMAL xf10 = Lerp(ValCoord3DFast(offset, x0, y1, z0), ValCoord3DFast(offset, x1, y1, z0), xs); - FN_DECIMAL xf01 = Lerp(ValCoord3DFast(offset, x0, y0, z1), ValCoord3DFast(offset, x1, y0, z1), xs); - FN_DECIMAL xf11 = Lerp(ValCoord3DFast(offset, x0, y1, z1), ValCoord3DFast(offset, x1, y1, z1), xs); - - FN_DECIMAL yf0 = Lerp(xf00, xf10, ys); - FN_DECIMAL yf1 = Lerp(xf01, xf11, ys); - - return Lerp(yf0, yf1, zs); -} - -FN_DECIMAL FastNoise::GetValueFractal(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SingleValueFractalFBM(x, y); - case Billow: - return SingleValueFractalBillow(x, y); - case RigidMulti: - return SingleValueFractalRigidMulti(x, y); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleValueFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = SingleValue(m_perm[0], x, y); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += SingleValue(m_perm[i], x, y) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleValueFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = FastAbs(SingleValue(m_perm[0], x, y)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - amp *= m_gain; - sum += (FastAbs(SingleValue(m_perm[i], x, y)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleValueFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = 1 - FastAbs(SingleValue(m_perm[0], x, y)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SingleValue(m_perm[i], x, y))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetValue(FN_DECIMAL x, FN_DECIMAL y) const -{ - return SingleValue(0, x * m_frequency, y * m_frequency); -} - -FN_DECIMAL FastNoise::SingleValue(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const -{ - int x0 = FastFloor(x); - int y0 = FastFloor(y); - int x1 = x0 + 1; - int y1 = y0 + 1; - - FN_DECIMAL xs, ys; - switch (m_interp) - { - case Linear: - xs = x - (FN_DECIMAL)x0; - ys = y - (FN_DECIMAL)y0; - break; - case Hermite: - xs = InterpHermiteFunc(x - (FN_DECIMAL)x0); - ys = InterpHermiteFunc(y - (FN_DECIMAL)y0); - break; - case Quintic: - xs = InterpQuinticFunc(x - (FN_DECIMAL)x0); - ys = InterpQuinticFunc(y - (FN_DECIMAL)y0); - break; - } - - FN_DECIMAL xf0 = Lerp(ValCoord2DFast(offset, x0, y0), ValCoord2DFast(offset, x1, y0), xs); - FN_DECIMAL xf1 = Lerp(ValCoord2DFast(offset, x0, y1), ValCoord2DFast(offset, x1, y1), xs); - - return Lerp(xf0, xf1, ys); -} - -// Perlin Noise -FN_DECIMAL FastNoise::GetPerlinFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - x *= m_frequency; - y *= m_frequency; - z *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SinglePerlinFractalFBM(x, y, z); - case Billow: - return SinglePerlinFractalBillow(x, y, z); - case RigidMulti: - return SinglePerlinFractalRigidMulti(x, y, z); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SinglePerlinFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = SinglePerlin(m_perm[0], x, y, z); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += SinglePerlin(m_perm[i], x, y, z) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SinglePerlinFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = FastAbs(SinglePerlin(m_perm[0], x, y, z)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SinglePerlin(m_perm[i], x, y, z)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SinglePerlinFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = 1 - FastAbs(SinglePerlin(m_perm[0], x, y, z)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SinglePerlin(m_perm[i], x, y, z))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetPerlin(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - return SinglePerlin(0, x * m_frequency, y * m_frequency, z * m_frequency); -} - -FN_DECIMAL FastNoise::SinglePerlin(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - int x0 = FastFloor(x); - int y0 = FastFloor(y); - int z0 = FastFloor(z); - int x1 = x0 + 1; - int y1 = y0 + 1; - int z1 = z0 + 1; - - FN_DECIMAL xs, ys, zs; - switch (m_interp) - { - case Linear: - xs = x - (FN_DECIMAL)x0; - ys = y - (FN_DECIMAL)y0; - zs = z - (FN_DECIMAL)z0; - break; - case Hermite: - xs = InterpHermiteFunc(x - (FN_DECIMAL)x0); - ys = InterpHermiteFunc(y - (FN_DECIMAL)y0); - zs = InterpHermiteFunc(z - (FN_DECIMAL)z0); - break; - case Quintic: - xs = InterpQuinticFunc(x - (FN_DECIMAL)x0); - ys = InterpQuinticFunc(y - (FN_DECIMAL)y0); - zs = InterpQuinticFunc(z - (FN_DECIMAL)z0); - break; - } - - FN_DECIMAL xd0 = x - (FN_DECIMAL)x0; - FN_DECIMAL yd0 = y - (FN_DECIMAL)y0; - FN_DECIMAL zd0 = z - (FN_DECIMAL)z0; - FN_DECIMAL xd1 = xd0 - 1; - FN_DECIMAL yd1 = yd0 - 1; - FN_DECIMAL zd1 = zd0 - 1; - - FN_DECIMAL xf00 = Lerp(GradCoord3D(offset, x0, y0, z0, xd0, yd0, zd0), GradCoord3D(offset, x1, y0, z0, xd1, yd0, zd0), xs); - FN_DECIMAL xf10 = Lerp(GradCoord3D(offset, x0, y1, z0, xd0, yd1, zd0), GradCoord3D(offset, x1, y1, z0, xd1, yd1, zd0), xs); - FN_DECIMAL xf01 = Lerp(GradCoord3D(offset, x0, y0, z1, xd0, yd0, zd1), GradCoord3D(offset, x1, y0, z1, xd1, yd0, zd1), xs); - FN_DECIMAL xf11 = Lerp(GradCoord3D(offset, x0, y1, z1, xd0, yd1, zd1), GradCoord3D(offset, x1, y1, z1, xd1, yd1, zd1), xs); - - FN_DECIMAL yf0 = Lerp(xf00, xf10, ys); - FN_DECIMAL yf1 = Lerp(xf01, xf11, ys); - - return Lerp(yf0, yf1, zs); -} - -FN_DECIMAL FastNoise::GetPerlinFractal(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SinglePerlinFractalFBM(x, y); - case Billow: - return SinglePerlinFractalBillow(x, y); - case RigidMulti: - return SinglePerlinFractalRigidMulti(x, y); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SinglePerlinFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = SinglePerlin(m_perm[0], x, y); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += SinglePerlin(m_perm[i], x, y) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SinglePerlinFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = FastAbs(SinglePerlin(m_perm[0], x, y)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SinglePerlin(m_perm[i], x, y)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SinglePerlinFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = 1 - FastAbs(SinglePerlin(m_perm[0], x, y)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SinglePerlin(m_perm[i], x, y))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetPerlin(FN_DECIMAL x, FN_DECIMAL y) const -{ - return SinglePerlin(0, x * m_frequency, y * m_frequency); -} - -FN_DECIMAL FastNoise::SinglePerlin(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const -{ - int x0 = FastFloor(x); - int y0 = FastFloor(y); - int x1 = x0 + 1; - int y1 = y0 + 1; - - FN_DECIMAL xs, ys; - switch (m_interp) - { - case Linear: - xs = x - (FN_DECIMAL)x0; - ys = y - (FN_DECIMAL)y0; - break; - case Hermite: - xs = InterpHermiteFunc(x - (FN_DECIMAL)x0); - ys = InterpHermiteFunc(y - (FN_DECIMAL)y0); - break; - case Quintic: - xs = InterpQuinticFunc(x - (FN_DECIMAL)x0); - ys = InterpQuinticFunc(y - (FN_DECIMAL)y0); - break; - } - - FN_DECIMAL xd0 = x - (FN_DECIMAL)x0; - FN_DECIMAL yd0 = y - (FN_DECIMAL)y0; - FN_DECIMAL xd1 = xd0 - 1; - FN_DECIMAL yd1 = yd0 - 1; - - FN_DECIMAL xf0 = Lerp(GradCoord2D(offset, x0, y0, xd0, yd0), GradCoord2D(offset, x1, y0, xd1, yd0), xs); - FN_DECIMAL xf1 = Lerp(GradCoord2D(offset, x0, y1, xd0, yd1), GradCoord2D(offset, x1, y1, xd1, yd1), xs); - - return Lerp(xf0, xf1, ys); -} - -// Simplex Noise - -FN_DECIMAL FastNoise::GetSimplexFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - x *= m_frequency; - y *= m_frequency; - z *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SingleSimplexFractalFBM(x, y, z); - case Billow: - return SingleSimplexFractalBillow(x, y, z); - case RigidMulti: - return SingleSimplexFractalRigidMulti(x, y, z); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleSimplexFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = SingleSimplex(m_perm[0], x, y, z); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += SingleSimplex(m_perm[i], x, y, z) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleSimplexFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = FastAbs(SingleSimplex(m_perm[0], x, y, z)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SingleSimplex(m_perm[i], x, y, z)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleSimplexFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = 1 - FastAbs(SingleSimplex(m_perm[0], x, y, z)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SingleSimplex(m_perm[i], x, y, z))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetSimplex(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - return SingleSimplex(0, x * m_frequency, y * m_frequency, z * m_frequency); -} - -static const FN_DECIMAL F3 = 1 / FN_DECIMAL(3); -static const FN_DECIMAL G3 = 1 / FN_DECIMAL(6); - -FN_DECIMAL FastNoise::SingleSimplex(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL t = (x + y + z) * F3; - int i = FastFloor(x + t); - int j = FastFloor(y + t); - int k = FastFloor(z + t); - - t = (i + j + k) * G3; - FN_DECIMAL X0 = i - t; - FN_DECIMAL Y0 = j - t; - FN_DECIMAL Z0 = k - t; - - FN_DECIMAL x0 = x - X0; - FN_DECIMAL y0 = y - Y0; - FN_DECIMAL z0 = z - Z0; - - int i1, j1, k1; - int i2, j2, k2; - - if (x0 >= y0) - { - if (y0 >= z0) - { - i1 = 1; j1 = 0; k1 = 0; i2 = 1; j2 = 1; k2 = 0; - } - else if (x0 >= z0) - { - i1 = 1; j1 = 0; k1 = 0; i2 = 1; j2 = 0; k2 = 1; - } - else // x0 < z0 - { - i1 = 0; j1 = 0; k1 = 1; i2 = 1; j2 = 0; k2 = 1; - } - } - else // x0 < y0 - { - if (y0 < z0) - { - i1 = 0; j1 = 0; k1 = 1; i2 = 0; j2 = 1; k2 = 1; - } - else if (x0 < z0) - { - i1 = 0; j1 = 1; k1 = 0; i2 = 0; j2 = 1; k2 = 1; - } - else // x0 >= z0 - { - i1 = 0; j1 = 1; k1 = 0; i2 = 1; j2 = 1; k2 = 0; - } - } - - FN_DECIMAL x1 = x0 - i1 + G3; - FN_DECIMAL y1 = y0 - j1 + G3; - FN_DECIMAL z1 = z0 - k1 + G3; - FN_DECIMAL x2 = x0 - i2 + 2*G3; - FN_DECIMAL y2 = y0 - j2 + 2*G3; - FN_DECIMAL z2 = z0 - k2 + 2*G3; - FN_DECIMAL x3 = x0 - 1 + 3*G3; - FN_DECIMAL y3 = y0 - 1 + 3*G3; - FN_DECIMAL z3 = z0 - 1 + 3*G3; - - FN_DECIMAL n0, n1, n2, n3; - - t = FN_DECIMAL(0.6) - x0*x0 - y0*y0 - z0*z0; - if (t < 0) n0 = 0; - else - { - t *= t; - n0 = t*t*GradCoord3D(offset, i, j, k, x0, y0, z0); - } - - t = FN_DECIMAL(0.6) - x1*x1 - y1*y1 - z1*z1; - if (t < 0) n1 = 0; - else - { - t *= t; - n1 = t*t*GradCoord3D(offset, i + i1, j + j1, k + k1, x1, y1, z1); - } - - t = FN_DECIMAL(0.6) - x2*x2 - y2*y2 - z2*z2; - if (t < 0) n2 = 0; - else - { - t *= t; - n2 = t*t*GradCoord3D(offset, i + i2, j + j2, k + k2, x2, y2, z2); - } - - t = FN_DECIMAL(0.6) - x3*x3 - y3*y3 - z3*z3; - if (t < 0) n3 = 0; - else - { - t *= t; - n3 = t*t*GradCoord3D(offset, i + 1, j + 1, k + 1, x3, y3, z3); - } - - return 32 * (n0 + n1 + n2 + n3); -} - -FN_DECIMAL FastNoise::GetSimplexFractal(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SingleSimplexFractalFBM(x, y); - case Billow: - return SingleSimplexFractalBillow(x, y); - case RigidMulti: - return SingleSimplexFractalRigidMulti(x, y); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleSimplexFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = SingleSimplex(m_perm[0], x, y); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += SingleSimplex(m_perm[i], x, y) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleSimplexFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = FastAbs(SingleSimplex(m_perm[0], x, y)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SingleSimplex(m_perm[i], x, y)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleSimplexFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = 1 - FastAbs(SingleSimplex(m_perm[0], x, y)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SingleSimplex(m_perm[i], x, y))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::SingleSimplexFractalBlend(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = SingleSimplex(m_perm[0], x, y); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum *= SingleSimplex(m_perm[i], x, y) * amp + 1; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::GetSimplex(FN_DECIMAL x, FN_DECIMAL y) const -{ - return SingleSimplex(0, x * m_frequency, y * m_frequency); -} - -//static const FN_DECIMAL F2 = 1 / FN_DECIMAL(2); -//static const FN_DECIMAL G2 = 1 / FN_DECIMAL(4); - -static const FN_DECIMAL SQRT3 = FN_DECIMAL(1.7320508075688772935274463415059); -static const FN_DECIMAL F2 = FN_DECIMAL(0.5) * (SQRT3 - FN_DECIMAL(1.0)); -static const FN_DECIMAL G2 = (FN_DECIMAL(3.0) - SQRT3) / FN_DECIMAL(6.0); - -FN_DECIMAL FastNoise::SingleSimplex(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL t = (x + y) * F2; - int i = FastFloor(x + t); - int j = FastFloor(y + t); - - t = (i + j) * G2; - FN_DECIMAL X0 = i - t; - FN_DECIMAL Y0 = j - t; - - FN_DECIMAL x0 = x - X0; - FN_DECIMAL y0 = y - Y0; - - int i1, j1; - if (x0 > y0) - { - i1 = 1; j1 = 0; - } - else - { - i1 = 0; j1 = 1; - } - - FN_DECIMAL x1 = x0 - (FN_DECIMAL)i1 + G2; - FN_DECIMAL y1 = y0 - (FN_DECIMAL)j1 + G2; - FN_DECIMAL x2 = x0 - 1 + 2*G2; - FN_DECIMAL y2 = y0 - 1 + 2*G2; - - FN_DECIMAL n0, n1, n2; - - t = FN_DECIMAL(0.5) - x0*x0 - y0*y0; - if (t < 0) n0 = 0; - else - { - t *= t; - n0 = t * t * GradCoord2D(offset, i, j, x0, y0); - } - - t = FN_DECIMAL(0.5) - x1*x1 - y1*y1; - if (t < 0) n1 = 0; - else - { - t *= t; - n1 = t*t*GradCoord2D(offset, i + i1, j + j1, x1, y1); - } - - t = FN_DECIMAL(0.5) - x2*x2 - y2*y2; - if (t < 0) n2 = 0; - else - { - t *= t; - n2 = t*t*GradCoord2D(offset, i + 1, j + 1, x2, y2); - } - - return 70 * (n0 + n1 + n2); -} - -FN_DECIMAL FastNoise::GetSimplex(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z, FN_DECIMAL w) const -{ - return SingleSimplex(0, x * m_frequency, y * m_frequency, z * m_frequency, w * m_frequency); -} - -static const FN_DECIMAL F4 = (sqrt(FN_DECIMAL(5)) - 1) / 4; -static const FN_DECIMAL G4 = (5 - sqrt(FN_DECIMAL(5))) / 20; - -FN_DECIMAL FastNoise::SingleSimplex(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z, FN_DECIMAL w) const -{ - FN_DECIMAL n0, n1, n2, n3, n4; - FN_DECIMAL t = (x + y + z + w) * F4; - int i = FastFloor(x + t); - int j = FastFloor(y + t); - int k = FastFloor(z + t); - int l = FastFloor(w + t); - t = (i + j + k + l) * G4; - FN_DECIMAL X0 = i - t; - FN_DECIMAL Y0 = j - t; - FN_DECIMAL Z0 = k - t; - FN_DECIMAL W0 = l - t; - FN_DECIMAL x0 = x - X0; - FN_DECIMAL y0 = y - Y0; - FN_DECIMAL z0 = z - Z0; - FN_DECIMAL w0 = w - W0; - - int rankx = 0; - int ranky = 0; - int rankz = 0; - int rankw = 0; - - if (x0 > y0) rankx++; else ranky++; - if (x0 > z0) rankx++; else rankz++; - if (x0 > w0) rankx++; else rankw++; - if (y0 > z0) ranky++; else rankz++; - if (y0 > w0) ranky++; else rankw++; - if (z0 > w0) rankz++; else rankw++; - - int i1 = rankx >= 3 ? 1 : 0; - int j1 = ranky >= 3 ? 1 : 0; - int k1 = rankz >= 3 ? 1 : 0; - int l1 = rankw >= 3 ? 1 : 0; - - int i2 = rankx >= 2 ? 1 : 0; - int j2 = ranky >= 2 ? 1 : 0; - int k2 = rankz >= 2 ? 1 : 0; - int l2 = rankw >= 2 ? 1 : 0; - - int i3 = rankx >= 1 ? 1 : 0; - int j3 = ranky >= 1 ? 1 : 0; - int k3 = rankz >= 1 ? 1 : 0; - int l3 = rankw >= 1 ? 1 : 0; - - FN_DECIMAL x1 = x0 - i1 + G4; - FN_DECIMAL y1 = y0 - j1 + G4; - FN_DECIMAL z1 = z0 - k1 + G4; - FN_DECIMAL w1 = w0 - l1 + G4; - FN_DECIMAL x2 = x0 - i2 + 2*G4; - FN_DECIMAL y2 = y0 - j2 + 2*G4; - FN_DECIMAL z2 = z0 - k2 + 2*G4; - FN_DECIMAL w2 = w0 - l2 + 2*G4; - FN_DECIMAL x3 = x0 - i3 + 3*G4; - FN_DECIMAL y3 = y0 - j3 + 3*G4; - FN_DECIMAL z3 = z0 - k3 + 3*G4; - FN_DECIMAL w3 = w0 - l3 + 3*G4; - FN_DECIMAL x4 = x0 - 1 + 4*G4; - FN_DECIMAL y4 = y0 - 1 + 4*G4; - FN_DECIMAL z4 = z0 - 1 + 4*G4; - FN_DECIMAL w4 = w0 - 1 + 4*G4; - - t = FN_DECIMAL(0.6) - x0*x0 - y0*y0 - z0*z0 - w0*w0; - if (t < 0) n0 = 0; - else { - t *= t; - n0 = t * t * GradCoord4D(offset, i, j, k, l, x0, y0, z0, w0); - } - t = FN_DECIMAL(0.6) - x1*x1 - y1*y1 - z1*z1 - w1*w1; - if (t < 0) n1 = 0; - else { - t *= t; - n1 = t * t * GradCoord4D(offset, i + i1, j + j1, k + k1, l + l1, x1, y1, z1, w1); - } - t = FN_DECIMAL(0.6) - x2*x2 - y2*y2 - z2*z2 - w2*w2; - if (t < 0) n2 = 0; - else { - t *= t; - n2 = t * t * GradCoord4D(offset, i + i2, j + j2, k + k2, l + l2, x2, y2, z2, w2); - } - t = FN_DECIMAL(0.6) - x3*x3 - y3*y3 - z3*z3 - w3*w3; - if (t < 0) n3 = 0; - else { - t *= t; - n3 = t * t * GradCoord4D(offset, i + i3, j + j3, k + k3, l + l3, x3, y3, z3, w3); - } - t = FN_DECIMAL(0.6) - x4*x4 - y4*y4 - z4*z4 - w4*w4; - if (t < 0) n4 = 0; - else { - t *= t; - n4 = t * t * GradCoord4D(offset, i + 1, j + 1, k + 1, l + 1, x4, y4, z4, w4); - } - - return 27 * (n0 + n1 + n2 + n3 + n4); -} - -// Cubic Noise -FN_DECIMAL FastNoise::GetCubicFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - x *= m_frequency; - y *= m_frequency; - z *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SingleCubicFractalFBM(x, y, z); - case Billow: - return SingleCubicFractalBillow(x, y, z); - case RigidMulti: - return SingleCubicFractalRigidMulti(x, y, z); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleCubicFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = SingleCubic(m_perm[0], x, y, z); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += SingleCubic(m_perm[i], x, y, z) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleCubicFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = FastAbs(SingleCubic(m_perm[0], x, y, z)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SingleCubic(m_perm[i], x, y, z)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleCubicFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - FN_DECIMAL sum = 1 - FastAbs(SingleCubic(m_perm[0], x, y, z)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - z *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SingleCubic(m_perm[i], x, y, z))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetCubic(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - return SingleCubic(0, x * m_frequency, y * m_frequency, z * m_frequency); -} - -const FN_DECIMAL CUBIC_3D_BOUNDING = 1 / (FN_DECIMAL(1.5) * FN_DECIMAL(1.5) * FN_DECIMAL(1.5)); - -FN_DECIMAL FastNoise::SingleCubic(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - int x1 = FastFloor(x); - int y1 = FastFloor(y); - int z1 = FastFloor(z); - - int x0 = x1 - 1; - int y0 = y1 - 1; - int z0 = z1 - 1; - int x2 = x1 + 1; - int y2 = y1 + 1; - int z2 = z1 + 1; - int x3 = x1 + 2; - int y3 = y1 + 2; - int z3 = z1 + 2; - - FN_DECIMAL xs = x - (FN_DECIMAL)x1; - FN_DECIMAL ys = y - (FN_DECIMAL)y1; - FN_DECIMAL zs = z - (FN_DECIMAL)z1; - - return CubicLerp( - CubicLerp( - CubicLerp(ValCoord3DFast(offset, x0, y0, z0), ValCoord3DFast(offset, x1, y0, z0), ValCoord3DFast(offset, x2, y0, z0), ValCoord3DFast(offset, x3, y0, z0), xs), - CubicLerp(ValCoord3DFast(offset, x0, y1, z0), ValCoord3DFast(offset, x1, y1, z0), ValCoord3DFast(offset, x2, y1, z0), ValCoord3DFast(offset, x3, y1, z0), xs), - CubicLerp(ValCoord3DFast(offset, x0, y2, z0), ValCoord3DFast(offset, x1, y2, z0), ValCoord3DFast(offset, x2, y2, z0), ValCoord3DFast(offset, x3, y2, z0), xs), - CubicLerp(ValCoord3DFast(offset, x0, y3, z0), ValCoord3DFast(offset, x1, y3, z0), ValCoord3DFast(offset, x2, y3, z0), ValCoord3DFast(offset, x3, y3, z0), xs), - ys), - CubicLerp( - CubicLerp(ValCoord3DFast(offset, x0, y0, z1), ValCoord3DFast(offset, x1, y0, z1), ValCoord3DFast(offset, x2, y0, z1), ValCoord3DFast(offset, x3, y0, z1), xs), - CubicLerp(ValCoord3DFast(offset, x0, y1, z1), ValCoord3DFast(offset, x1, y1, z1), ValCoord3DFast(offset, x2, y1, z1), ValCoord3DFast(offset, x3, y1, z1), xs), - CubicLerp(ValCoord3DFast(offset, x0, y2, z1), ValCoord3DFast(offset, x1, y2, z1), ValCoord3DFast(offset, x2, y2, z1), ValCoord3DFast(offset, x3, y2, z1), xs), - CubicLerp(ValCoord3DFast(offset, x0, y3, z1), ValCoord3DFast(offset, x1, y3, z1), ValCoord3DFast(offset, x2, y3, z1), ValCoord3DFast(offset, x3, y3, z1), xs), - ys), - CubicLerp( - CubicLerp(ValCoord3DFast(offset, x0, y0, z2), ValCoord3DFast(offset, x1, y0, z2), ValCoord3DFast(offset, x2, y0, z2), ValCoord3DFast(offset, x3, y0, z2), xs), - CubicLerp(ValCoord3DFast(offset, x0, y1, z2), ValCoord3DFast(offset, x1, y1, z2), ValCoord3DFast(offset, x2, y1, z2), ValCoord3DFast(offset, x3, y1, z2), xs), - CubicLerp(ValCoord3DFast(offset, x0, y2, z2), ValCoord3DFast(offset, x1, y2, z2), ValCoord3DFast(offset, x2, y2, z2), ValCoord3DFast(offset, x3, y2, z2), xs), - CubicLerp(ValCoord3DFast(offset, x0, y3, z2), ValCoord3DFast(offset, x1, y3, z2), ValCoord3DFast(offset, x2, y3, z2), ValCoord3DFast(offset, x3, y3, z2), xs), - ys), - CubicLerp( - CubicLerp(ValCoord3DFast(offset, x0, y0, z3), ValCoord3DFast(offset, x1, y0, z3), ValCoord3DFast(offset, x2, y0, z3), ValCoord3DFast(offset, x3, y0, z3), xs), - CubicLerp(ValCoord3DFast(offset, x0, y1, z3), ValCoord3DFast(offset, x1, y1, z3), ValCoord3DFast(offset, x2, y1, z3), ValCoord3DFast(offset, x3, y1, z3), xs), - CubicLerp(ValCoord3DFast(offset, x0, y2, z3), ValCoord3DFast(offset, x1, y2, z3), ValCoord3DFast(offset, x2, y2, z3), ValCoord3DFast(offset, x3, y2, z3), xs), - CubicLerp(ValCoord3DFast(offset, x0, y3, z3), ValCoord3DFast(offset, x1, y3, z3), ValCoord3DFast(offset, x2, y3, z3), ValCoord3DFast(offset, x3, y3, z3), xs), - ys), - zs) * CUBIC_3D_BOUNDING; -} - - -FN_DECIMAL FastNoise::GetCubicFractal(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - switch (m_fractalType) - { - case FBM: - return SingleCubicFractalFBM(x, y); - case Billow: - return SingleCubicFractalBillow(x, y); - case RigidMulti: - return SingleCubicFractalRigidMulti(x, y); - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleCubicFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = SingleCubic(m_perm[0], x, y); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += SingleCubic(m_perm[i], x, y) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleCubicFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = FastAbs(SingleCubic(m_perm[0], x, y)) * 2 - 1; - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum += (FastAbs(SingleCubic(m_perm[i], x, y)) * 2 - 1) * amp; - } - - return sum * m_fractalBounding; -} - -FN_DECIMAL FastNoise::SingleCubicFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const -{ - FN_DECIMAL sum = 1 - FastAbs(SingleCubic(m_perm[0], x, y)); - FN_DECIMAL amp = 1; - int i = 0; - - while (++i < m_octaves) - { - x *= m_lacunarity; - y *= m_lacunarity; - - amp *= m_gain; - sum -= (1 - FastAbs(SingleCubic(m_perm[i], x, y))) * amp; - } - - return sum; -} - -FN_DECIMAL FastNoise::GetCubic(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - return SingleCubic(0, x, y); -} - -const FN_DECIMAL CUBIC_2D_BOUNDING = 1 / (FN_DECIMAL(1.5) * FN_DECIMAL(1.5)); - -FN_DECIMAL FastNoise::SingleCubic(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const -{ - int x1 = FastFloor(x); - int y1 = FastFloor(y); - - int x0 = x1 - 1; - int y0 = y1 - 1; - int x2 = x1 + 1; - int y2 = y1 + 1; - int x3 = x1 + 2; - int y3 = y1 + 2; - - FN_DECIMAL xs = x - (FN_DECIMAL)x1; - FN_DECIMAL ys = y - (FN_DECIMAL)y1; - - return CubicLerp( - CubicLerp(ValCoord2DFast(offset, x0, y0), ValCoord2DFast(offset, x1, y0), ValCoord2DFast(offset, x2, y0), ValCoord2DFast(offset, x3, y0), xs), - CubicLerp(ValCoord2DFast(offset, x0, y1), ValCoord2DFast(offset, x1, y1), ValCoord2DFast(offset, x2, y1), ValCoord2DFast(offset, x3, y1), xs), - CubicLerp(ValCoord2DFast(offset, x0, y2), ValCoord2DFast(offset, x1, y2), ValCoord2DFast(offset, x2, y2), ValCoord2DFast(offset, x3, y2), xs), - CubicLerp(ValCoord2DFast(offset, x0, y3), ValCoord2DFast(offset, x1, y3), ValCoord2DFast(offset, x2, y3), ValCoord2DFast(offset, x3, y3), xs), - ys) * CUBIC_2D_BOUNDING; -} - -// Cellular Noise -FN_DECIMAL FastNoise::GetCellular(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - x *= m_frequency; - y *= m_frequency; - z *= m_frequency; - - switch (m_cellularReturnType) - { - case CellValue: - case NoiseLookup: - case Distance: - return SingleCellular(x, y, z); - default: - return SingleCellular2Edge(x, y, z); - } -} - -FN_DECIMAL FastNoise::SingleCellular(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - int xr = FastRound(x); - int yr = FastRound(y); - int zr = FastRound(z); - - FN_DECIMAL distance = 999999; - int xc, yc, zc; - - switch (m_cellularDistanceFunction) - { - case Euclidean: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - for (int zi = zr - 1; zi <= zr + 1; zi++) - { - unsigned char lutPos = Index3D_256(0, xi, yi, zi); - - FN_DECIMAL vecX = xi - x + CELL_3D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_3D_Y[lutPos] * m_cellularJitter; - FN_DECIMAL vecZ = zi - z + CELL_3D_Z[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = vecX * vecX + vecY * vecY + vecZ * vecZ; - - if (newDistance < distance) - { - distance = newDistance; - xc = xi; - yc = yi; - zc = zi; - } - } - } - } - break; - case Manhattan: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - for (int zi = zr - 1; zi <= zr + 1; zi++) - { - unsigned char lutPos = Index3D_256(0, xi, yi, zi); - - FN_DECIMAL vecX = xi - x + CELL_3D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_3D_Y[lutPos] * m_cellularJitter; - FN_DECIMAL vecZ = zi - z + CELL_3D_Z[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = FastAbs(vecX) + FastAbs(vecY) + FastAbs(vecZ); - - if (newDistance < distance) - { - distance = newDistance; - xc = xi; - yc = yi; - zc = zi; - } - } - } - } - break; - case Natural: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - for (int zi = zr - 1; zi <= zr + 1; zi++) - { - unsigned char lutPos = Index3D_256(0, xi, yi, zi); - - FN_DECIMAL vecX = xi - x + CELL_3D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_3D_Y[lutPos] * m_cellularJitter; - FN_DECIMAL vecZ = zi - z + CELL_3D_Z[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = (FastAbs(vecX) + FastAbs(vecY) + FastAbs(vecZ)) + (vecX * vecX + vecY * vecY + vecZ * vecZ); - - if (newDistance < distance) - { - distance = newDistance; - xc = xi; - yc = yi; - zc = zi; - } - } - } - } - break; - default: - break; - } - - unsigned char lutPos; - switch (m_cellularReturnType) - { - case CellValue: - return ValCoord3D(m_seed, xc, yc, zc); - - case NoiseLookup: - assert(m_cellularNoiseLookup); - - lutPos = Index3D_256(0, xc, yc, zc); - return m_cellularNoiseLookup->GetNoise(xc + CELL_3D_X[lutPos] * m_cellularJitter, yc + CELL_3D_Y[lutPos] * m_cellularJitter, zc + CELL_3D_Z[lutPos] * m_cellularJitter); - - case Distance: - return distance; - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleCellular2Edge(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const -{ - int xr = FastRound(x); - int yr = FastRound(y); - int zr = FastRound(z); - - FN_DECIMAL distance[FN_CELLULAR_INDEX_MAX+1] = { 999999,999999,999999,999999 }; - - switch (m_cellularDistanceFunction) - { - case Euclidean: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - for (int zi = zr - 1; zi <= zr + 1; zi++) - { - unsigned char lutPos = Index3D_256(0, xi, yi, zi); - - FN_DECIMAL vecX = xi - x + CELL_3D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_3D_Y[lutPos] * m_cellularJitter; - FN_DECIMAL vecZ = zi - z + CELL_3D_Z[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = vecX * vecX + vecY * vecY + vecZ * vecZ; - - for (int i = m_cellularDistanceIndex1; i > 0; i--) - distance[i] = fmax(fmin(distance[i], newDistance), distance[i - 1]); - distance[0] = fmin(distance[0], newDistance); - } - } - } - break; - case Manhattan: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - for (int zi = zr - 1; zi <= zr + 1; zi++) - { - unsigned char lutPos = Index3D_256(0, xi, yi, zi); - - FN_DECIMAL vecX = xi - x + CELL_3D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_3D_Y[lutPos] * m_cellularJitter; - FN_DECIMAL vecZ = zi - z + CELL_3D_Z[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = FastAbs(vecX) + FastAbs(vecY) + FastAbs(vecZ); - - for (int i = m_cellularDistanceIndex1; i > 0; i--) - distance[i] = fmax(fmin(distance[i], newDistance), distance[i - 1]); - distance[0] = fmin(distance[0], newDistance); - } - } - } - break; - case Natural: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - for (int zi = zr - 1; zi <= zr + 1; zi++) - { - unsigned char lutPos = Index3D_256(0, xi, yi, zi); - - FN_DECIMAL vecX = xi - x + CELL_3D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_3D_Y[lutPos] * m_cellularJitter; - FN_DECIMAL vecZ = zi - z + CELL_3D_Z[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = (FastAbs(vecX) + FastAbs(vecY) + FastAbs(vecZ)) + (vecX * vecX + vecY * vecY + vecZ * vecZ); - - for (int i = m_cellularDistanceIndex1; i > 0; i--) - distance[i] = fmax(fmin(distance[i], newDistance), distance[i - 1]); - distance[0] = fmin(distance[0], newDistance); - } - } - } - break; - default: - break; - } - - switch (m_cellularReturnType) - { - case Distance2: - return distance[m_cellularDistanceIndex1]; - case Distance2Add: - return distance[m_cellularDistanceIndex1] + distance[m_cellularDistanceIndex0]; - case Distance2Sub: - return distance[m_cellularDistanceIndex1] - distance[m_cellularDistanceIndex0]; - case Distance2Mul: - return distance[m_cellularDistanceIndex1] * distance[m_cellularDistanceIndex0]; - case Distance2Div: - return distance[m_cellularDistanceIndex0] / distance[m_cellularDistanceIndex1]; - default: - return 0; - } -} - -FN_DECIMAL FastNoise::GetCellular(FN_DECIMAL x, FN_DECIMAL y) const -{ - x *= m_frequency; - y *= m_frequency; - - switch (m_cellularReturnType) - { - case CellValue: - case NoiseLookup: - case Distance: - return SingleCellular(x, y); - default: - return SingleCellular2Edge(x, y); - } -} - -FN_DECIMAL FastNoise::SingleCellular(FN_DECIMAL x, FN_DECIMAL y) const -{ - int xr = FastRound(x); - int yr = FastRound(y); - - FN_DECIMAL distance = 999999; - int xc, yc; - - switch (m_cellularDistanceFunction) - { - default: - case Euclidean: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - unsigned char lutPos = Index2D_256(0, xi, yi); - - FN_DECIMAL vecX = xi - x + CELL_2D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_2D_Y[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = vecX * vecX + vecY * vecY; - - if (newDistance < distance) - { - distance = newDistance; - xc = xi; - yc = yi; - } - } - } - break; - case Manhattan: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - unsigned char lutPos = Index2D_256(0, xi, yi); - - FN_DECIMAL vecX = xi - x + CELL_2D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_2D_Y[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = (FastAbs(vecX) + FastAbs(vecY)); - - if (newDistance < distance) - { - distance = newDistance; - xc = xi; - yc = yi; - } - } - } - break; - case Natural: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - unsigned char lutPos = Index2D_256(0, xi, yi); - - FN_DECIMAL vecX = xi - x + CELL_2D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_2D_Y[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = (FastAbs(vecX) + FastAbs(vecY)) + (vecX * vecX + vecY * vecY); - - if (newDistance < distance) - { - distance = newDistance; - xc = xi; - yc = yi; - } - } - } - break; - } - - unsigned char lutPos; - switch (m_cellularReturnType) - { - case CellValue: - return ValCoord2D(m_seed, xc, yc); - - case NoiseLookup: - assert(m_cellularNoiseLookup); - - lutPos = Index2D_256(0, xc, yc); - return m_cellularNoiseLookup->GetNoise(xc + CELL_2D_X[lutPos] * m_cellularJitter, yc + CELL_2D_Y[lutPos] * m_cellularJitter); - - case Distance: - return distance; - default: - return 0; - } -} - -FN_DECIMAL FastNoise::SingleCellular2Edge(FN_DECIMAL x, FN_DECIMAL y) const -{ - int xr = FastRound(x); - int yr = FastRound(y); - - FN_DECIMAL distance[FN_CELLULAR_INDEX_MAX + 1] = { 999999,999999,999999,999999 }; - - switch (m_cellularDistanceFunction) - { - default: - case Euclidean: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - unsigned char lutPos = Index2D_256(0, xi, yi); - - FN_DECIMAL vecX = xi - x + CELL_2D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_2D_Y[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = vecX * vecX + vecY * vecY; - - for (int i = m_cellularDistanceIndex1; i > 0; i--) - distance[i] = fmax(fmin(distance[i], newDistance), distance[i - 1]); - distance[0] = fmin(distance[0], newDistance); - } - } - break; - case Manhattan: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - unsigned char lutPos = Index2D_256(0, xi, yi); - - FN_DECIMAL vecX = xi - x + CELL_2D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_2D_Y[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = FastAbs(vecX) + FastAbs(vecY); - - for (int i = m_cellularDistanceIndex1; i > 0; i--) - distance[i] = fmax(fmin(distance[i], newDistance), distance[i - 1]); - distance[0] = fmin(distance[0], newDistance); - } - } - break; - case Natural: - for (int xi = xr - 1; xi <= xr + 1; xi++) - { - for (int yi = yr - 1; yi <= yr + 1; yi++) - { - unsigned char lutPos = Index2D_256(0, xi, yi); - - FN_DECIMAL vecX = xi - x + CELL_2D_X[lutPos] * m_cellularJitter; - FN_DECIMAL vecY = yi - y + CELL_2D_Y[lutPos] * m_cellularJitter; - - FN_DECIMAL newDistance = (FastAbs(vecX) + FastAbs(vecY)) + (vecX * vecX + vecY * vecY); - - for (int i = m_cellularDistanceIndex1; i > 0; i--) - distance[i] = fmax(fmin(distance[i], newDistance), distance[i - 1]); - distance[0] = fmin(distance[0], newDistance); - } - } - break; - } - - switch (m_cellularReturnType) - { - case Distance2: - return distance[m_cellularDistanceIndex1]; - case Distance2Add: - return distance[m_cellularDistanceIndex1] + distance[m_cellularDistanceIndex0]; - case Distance2Sub: - return distance[m_cellularDistanceIndex1] - distance[m_cellularDistanceIndex0]; - case Distance2Mul: - return distance[m_cellularDistanceIndex1] * distance[m_cellularDistanceIndex0]; - case Distance2Div: - return distance[m_cellularDistanceIndex0] / distance[m_cellularDistanceIndex1]; - default: - return 0; - } -} - -void FastNoise::GradientPerturb(FN_DECIMAL& x, FN_DECIMAL& y, FN_DECIMAL& z) const -{ - SingleGradientPerturb(0, m_gradientPerturbAmp, m_frequency, x, y, z); -} - -void FastNoise::GradientPerturbFractal(FN_DECIMAL& x, FN_DECIMAL& y, FN_DECIMAL& z) const -{ - FN_DECIMAL amp = m_gradientPerturbAmp * m_fractalBounding; - FN_DECIMAL freq = m_frequency; - int i = 0; - - SingleGradientPerturb(m_perm[0], amp, m_frequency, x, y, z); - - while (++i < m_octaves) - { - freq *= m_lacunarity; - amp *= m_gain; - SingleGradientPerturb(m_perm[i], amp, freq, x, y, z); - } -} - -void FastNoise::SingleGradientPerturb(unsigned char offset, FN_DECIMAL warpAmp, FN_DECIMAL frequency, FN_DECIMAL& x, FN_DECIMAL& y, FN_DECIMAL& z) const -{ - FN_DECIMAL xf = x * frequency; - FN_DECIMAL yf = y * frequency; - FN_DECIMAL zf = z * frequency; - - int x0 = FastFloor(xf); - int y0 = FastFloor(yf); - int z0 = FastFloor(zf); - int x1 = x0 + 1; - int y1 = y0 + 1; - int z1 = z0 + 1; - - FN_DECIMAL xs, ys, zs; - switch (m_interp) - { - default: - case Linear: - xs = xf - (FN_DECIMAL)x0; - ys = yf - (FN_DECIMAL)y0; - zs = zf - (FN_DECIMAL)z0; - break; - case Hermite: - xs = InterpHermiteFunc(xf - (FN_DECIMAL)x0); - ys = InterpHermiteFunc(yf - (FN_DECIMAL)y0); - zs = InterpHermiteFunc(zf - (FN_DECIMAL)z0); - break; - case Quintic: - xs = InterpQuinticFunc(xf - (FN_DECIMAL)x0); - ys = InterpQuinticFunc(yf - (FN_DECIMAL)y0); - zs = InterpQuinticFunc(zf - (FN_DECIMAL)z0); - break; - } - - int lutPos0 = Index3D_256(offset, x0, y0, z0); - int lutPos1 = Index3D_256(offset, x1, y0, z0); - - FN_DECIMAL lx0x = Lerp(CELL_3D_X[lutPos0], CELL_3D_X[lutPos1], xs); - FN_DECIMAL ly0x = Lerp(CELL_3D_Y[lutPos0], CELL_3D_Y[lutPos1], xs); - FN_DECIMAL lz0x = Lerp(CELL_3D_Z[lutPos0], CELL_3D_Z[lutPos1], xs); - - lutPos0 = Index3D_256(offset, x0, y1, z0); - lutPos1 = Index3D_256(offset, x1, y1, z0); - - FN_DECIMAL lx1x = Lerp(CELL_3D_X[lutPos0], CELL_3D_X[lutPos1], xs); - FN_DECIMAL ly1x = Lerp(CELL_3D_Y[lutPos0], CELL_3D_Y[lutPos1], xs); - FN_DECIMAL lz1x = Lerp(CELL_3D_Z[lutPos0], CELL_3D_Z[lutPos1], xs); - - FN_DECIMAL lx0y = Lerp(lx0x, lx1x, ys); - FN_DECIMAL ly0y = Lerp(ly0x, ly1x, ys); - FN_DECIMAL lz0y = Lerp(lz0x, lz1x, ys); - - lutPos0 = Index3D_256(offset, x0, y0, z1); - lutPos1 = Index3D_256(offset, x1, y0, z1); - - lx0x = Lerp(CELL_3D_X[lutPos0], CELL_3D_X[lutPos1], xs); - ly0x = Lerp(CELL_3D_Y[lutPos0], CELL_3D_Y[lutPos1], xs); - lz0x = Lerp(CELL_3D_Z[lutPos0], CELL_3D_Z[lutPos1], xs); - - lutPos0 = Index3D_256(offset, x0, y1, z1); - lutPos1 = Index3D_256(offset, x1, y1, z1); - - lx1x = Lerp(CELL_3D_X[lutPos0], CELL_3D_X[lutPos1], xs); - ly1x = Lerp(CELL_3D_Y[lutPos0], CELL_3D_Y[lutPos1], xs); - lz1x = Lerp(CELL_3D_Z[lutPos0], CELL_3D_Z[lutPos1], xs); - - x += Lerp(lx0y, Lerp(lx0x, lx1x, ys), zs) * warpAmp; - y += Lerp(ly0y, Lerp(ly0x, ly1x, ys), zs) * warpAmp; - z += Lerp(lz0y, Lerp(lz0x, lz1x, ys), zs) * warpAmp; -} - -void FastNoise::GradientPerturb(FN_DECIMAL& x, FN_DECIMAL& y) const -{ - SingleGradientPerturb(0, m_gradientPerturbAmp, m_frequency, x, y); -} - -void FastNoise::GradientPerturbFractal(FN_DECIMAL& x, FN_DECIMAL& y) const -{ - FN_DECIMAL amp = m_gradientPerturbAmp * m_fractalBounding; - FN_DECIMAL freq = m_frequency; - int i = 0; - - SingleGradientPerturb(m_perm[0], amp, m_frequency, x, y); - - while (++i < m_octaves) - { - freq *= m_lacunarity; - amp *= m_gain; - SingleGradientPerturb(m_perm[i], amp, freq, x, y); - } -} - -void FastNoise::SingleGradientPerturb(unsigned char offset, FN_DECIMAL warpAmp, FN_DECIMAL frequency, FN_DECIMAL& x, FN_DECIMAL& y) const -{ - FN_DECIMAL xf = x * frequency; - FN_DECIMAL yf = y * frequency; - - int x0 = FastFloor(xf); - int y0 = FastFloor(yf); - int x1 = x0 + 1; - int y1 = y0 + 1; - - FN_DECIMAL xs, ys; - switch (m_interp) - { - default: - case Linear: - xs = xf - (FN_DECIMAL)x0; - ys = yf - (FN_DECIMAL)y0; - break; - case Hermite: - xs = InterpHermiteFunc(xf - (FN_DECIMAL)x0); - ys = InterpHermiteFunc(yf - (FN_DECIMAL)y0); - break; - case Quintic: - xs = InterpQuinticFunc(xf - (FN_DECIMAL)x0); - ys = InterpQuinticFunc(yf - (FN_DECIMAL)y0); - break; - } - - int lutPos0 = Index2D_256(offset, x0, y0); - int lutPos1 = Index2D_256(offset, x1, y0); - - FN_DECIMAL lx0x = Lerp(CELL_2D_X[lutPos0], CELL_2D_X[lutPos1], xs); - FN_DECIMAL ly0x = Lerp(CELL_2D_Y[lutPos0], CELL_2D_Y[lutPos1], xs); - - lutPos0 = Index2D_256(offset, x0, y1); - lutPos1 = Index2D_256(offset, x1, y1); - - FN_DECIMAL lx1x = Lerp(CELL_2D_X[lutPos0], CELL_2D_X[lutPos1], xs); - FN_DECIMAL ly1x = Lerp(CELL_2D_Y[lutPos0], CELL_2D_Y[lutPos1], xs); - - x += Lerp(lx0x, lx1x, ys) * warpAmp; - y += Lerp(ly0x, ly1x, ys) * warpAmp; -} diff --git a/src/util/fastnoise.hpp b/src/util/fastnoise.hpp deleted file mode 100644 index f6c8d21..0000000 --- a/src/util/fastnoise.hpp +++ /dev/null @@ -1,311 +0,0 @@ -// FastNoise.h -// -// MIT License -// -// Copyright(c) 2017 Jordan Peck -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files(the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions : -// -// The above copyright notice and this permission notice shall be included in all -// copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -// SOFTWARE. -// -// The developer's email is jorzixdan.me2@gzixmail.com (for great email, take -// off every 'zix'.) -// - -// VERSION: 0.4.1 - -#ifndef FASTNOISE_H -#define FASTNOISE_H - -// Uncomment the line below to use doubles throughout FastNoise instead of floats -//#define FN_USE_DOUBLES - -#define FN_CELLULAR_INDEX_MAX 3 - -#ifdef FN_USE_DOUBLES -typedef double FN_DECIMAL; -#else -typedef float FN_DECIMAL; -#endif - -class FastNoise -{ -public: - explicit FastNoise(int seed = 1337) { SetSeed(seed); CalculateFractalBounding(); } - - enum NoiseType { Value, ValueFractal, Perlin, PerlinFractal, Simplex, SimplexFractal, Cellular, WhiteNoise, Cubic, CubicFractal }; - enum Interp { Linear, Hermite, Quintic }; - enum FractalType { FBM, Billow, RigidMulti }; - enum CellularDistanceFunction { Euclidean, Manhattan, Natural }; - enum CellularReturnType { CellValue, NoiseLookup, Distance, Distance2, Distance2Add, Distance2Sub, Distance2Mul, Distance2Div }; - - // Sets seed used for all noise types - // Default: 1337 - void SetSeed(int seed); - - // Returns seed used for all noise types - int GetSeed() const { return m_seed; } - - // Sets frequency for all noise types - // Default: 0.01 - void SetFrequency(FN_DECIMAL frequency) { m_frequency = frequency; } - - // Returns frequency used for all noise types - FN_DECIMAL GetFrequency() const { return m_frequency; } - - // Changes the interpolation method used to smooth between noise values - // Possible interpolation methods (lowest to highest quality) : - // - Linear - // - Hermite - // - Quintic - // Used in Value, Perlin Noise and Position Warping - // Default: Quintic - void SetInterp(Interp interp) { m_interp = interp; } - - // Returns interpolation method used for supported noise types - Interp GetInterp() const { return m_interp; } - - // Sets noise return type of GetNoise(...) - // Default: Simplex - void SetNoiseType(NoiseType noiseType) { m_noiseType = noiseType; } - - // Returns the noise type used by GetNoise - NoiseType GetNoiseType() const { return m_noiseType; } - - // Sets octave count for all fractal noise types - // Default: 3 - void SetFractalOctaves(int octaves) { m_octaves = octaves; CalculateFractalBounding(); } - - // Returns octave count for all fractal noise types - int GetFractalOctaves() const { return m_octaves; } - - // Sets octave lacunarity for all fractal noise types - // Default: 2.0 - void SetFractalLacunarity(FN_DECIMAL lacunarity) { m_lacunarity = lacunarity; } - - // Returns octave lacunarity for all fractal noise types - FN_DECIMAL GetFractalLacunarity() const { return m_lacunarity; } - - // Sets octave gain for all fractal noise types - // Default: 0.5 - void SetFractalGain(FN_DECIMAL gain) { m_gain = gain; CalculateFractalBounding(); } - - // Returns octave gain for all fractal noise types - FN_DECIMAL GetFractalGain() const { return m_gain; } - - // Sets method for combining octaves in all fractal noise types - // Default: FBM - void SetFractalType(FractalType fractalType) { m_fractalType = fractalType; } - - // Returns method for combining octaves in all fractal noise types - FractalType GetFractalType() const { return m_fractalType; } - - - // Sets distance function used in cellular noise calculations - // Default: Euclidean - void SetCellularDistanceFunction(CellularDistanceFunction cellularDistanceFunction) { m_cellularDistanceFunction = cellularDistanceFunction; } - - // Returns the distance function used in cellular noise calculations - CellularDistanceFunction GetCellularDistanceFunction() const { return m_cellularDistanceFunction; } - - // Sets return type from cellular noise calculations - // Note: NoiseLookup requires another FastNoise object be set with SetCellularNoiseLookup() to function - // Default: CellValue - void SetCellularReturnType(CellularReturnType cellularReturnType) { m_cellularReturnType = cellularReturnType; } - - // Returns the return type from cellular noise calculations - CellularReturnType GetCellularReturnType() const { return m_cellularReturnType; } - - // Noise used to calculate a cell value if cellular return type is NoiseLookup - // The lookup value is acquired through GetNoise() so ensure you SetNoiseType() on the noise lookup, value, Perlin or simplex is recommended - void SetCellularNoiseLookup(FastNoise* noise) { m_cellularNoiseLookup = noise; } - - // Returns the noise used to calculate a cell value if the cellular return type is NoiseLookup - FastNoise* GetCellularNoiseLookup() const { return m_cellularNoiseLookup; } - - // Sets the 2 distance indices used for distance2 return types - // Default: 0, 1 - // Note: index0 should be lower than index1 - // Both indices must be >= 0, index1 must be < 4 - void SetCellularDistance2Indices(int cellularDistanceIndex0, int cellularDistanceIndex1); - - // Returns the 2 distance indices used for distance2 return types - void GetCellularDistance2Indices(int& cellularDistanceIndex0, int& cellularDistanceIndex1) const; - - // Sets the maximum distance a cellular point can move from its grid position - // Setting this high will make artifacts more common - // Default: 0.45 - void SetCellularJitter(FN_DECIMAL cellularJitter) { m_cellularJitter = cellularJitter; } - - // Returns the maximum distance a cellular point can move from its grid position - FN_DECIMAL GetCellularJitter() const { return m_cellularJitter; } - - // Sets the maximum warp distance from original location when using GradientPerturb{Fractal}(...) - // Default: 1.0 - void SetGradientPerturbAmp(FN_DECIMAL gradientPerturbAmp) { m_gradientPerturbAmp = gradientPerturbAmp; } - - // Returns the maximum warp distance from original location when using GradientPerturb{Fractal}(...) - FN_DECIMAL GetGradientPerturbAmp() const { return m_gradientPerturbAmp; } - - //2D - FN_DECIMAL GetValue(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL GetValueFractal(FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL GetPerlin(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL GetPerlinFractal(FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL GetSimplex(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL GetSimplexFractal(FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL GetCellular(FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL GetWhiteNoise(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL GetWhiteNoiseInt(int x, int y) const; - - FN_DECIMAL GetCubic(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL GetCubicFractal(FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL GetNoise(FN_DECIMAL x, FN_DECIMAL y) const; - - void GradientPerturb(FN_DECIMAL& x, FN_DECIMAL& y) const; - void GradientPerturbFractal(FN_DECIMAL& x, FN_DECIMAL& y) const; - - //3D - FN_DECIMAL GetValue(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL GetValueFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL GetPerlin(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL GetPerlinFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL GetSimplex(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL GetSimplexFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL GetCellular(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL GetWhiteNoise(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL GetWhiteNoiseInt(int x, int y, int z) const; - - FN_DECIMAL GetCubic(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL GetCubicFractal(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL GetNoise(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - void GradientPerturb(FN_DECIMAL& x, FN_DECIMAL& y, FN_DECIMAL& z) const; - void GradientPerturbFractal(FN_DECIMAL& x, FN_DECIMAL& y, FN_DECIMAL& z) const; - - //4D - FN_DECIMAL GetSimplex(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z, FN_DECIMAL w) const; - - FN_DECIMAL GetWhiteNoise(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z, FN_DECIMAL w) const; - FN_DECIMAL GetWhiteNoiseInt(int x, int y, int z, int w) const; - -private: - unsigned char m_perm[512]; - unsigned char m_perm12[512]; - - int m_seed = 1337; - FN_DECIMAL m_frequency = FN_DECIMAL(0.01); - Interp m_interp = Quintic; - NoiseType m_noiseType = Simplex; - - int m_octaves = 3; - FN_DECIMAL m_lacunarity = FN_DECIMAL(2); - FN_DECIMAL m_gain = FN_DECIMAL(0.5); - FractalType m_fractalType = FBM; - FN_DECIMAL m_fractalBounding; - - CellularDistanceFunction m_cellularDistanceFunction = Euclidean; - CellularReturnType m_cellularReturnType = CellValue; - FastNoise* m_cellularNoiseLookup = nullptr; - int m_cellularDistanceIndex0 = 0; - int m_cellularDistanceIndex1 = 1; - FN_DECIMAL m_cellularJitter = FN_DECIMAL(0.45); - - FN_DECIMAL m_gradientPerturbAmp = FN_DECIMAL(1); - - void CalculateFractalBounding(); - - //2D - FN_DECIMAL SingleValueFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleValueFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleValueFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleValue(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL SinglePerlinFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SinglePerlinFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SinglePerlinFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SinglePerlin(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL SingleSimplexFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleSimplexFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleSimplexFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleSimplexFractalBlend(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleSimplex(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL SingleCubicFractalFBM(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleCubicFractalBillow(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleCubicFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleCubic(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y) const; - - FN_DECIMAL SingleCellular(FN_DECIMAL x, FN_DECIMAL y) const; - FN_DECIMAL SingleCellular2Edge(FN_DECIMAL x, FN_DECIMAL y) const; - - void SingleGradientPerturb(unsigned char offset, FN_DECIMAL warpAmp, FN_DECIMAL frequency, FN_DECIMAL& x, FN_DECIMAL& y) const; - - //3D - FN_DECIMAL SingleValueFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleValueFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleValueFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleValue(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL SinglePerlinFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SinglePerlinFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SinglePerlinFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SinglePerlin(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL SingleSimplexFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleSimplexFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleSimplexFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleSimplex(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL SingleCubicFractalFBM(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleCubicFractalBillow(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleCubicFractalRigidMulti(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleCubic(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - FN_DECIMAL SingleCellular(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - FN_DECIMAL SingleCellular2Edge(FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z) const; - - void SingleGradientPerturb(unsigned char offset, FN_DECIMAL warpAmp, FN_DECIMAL frequency, FN_DECIMAL& x, FN_DECIMAL& y, FN_DECIMAL& z) const; - - //4D - FN_DECIMAL SingleSimplex(unsigned char offset, FN_DECIMAL x, FN_DECIMAL y, FN_DECIMAL z, FN_DECIMAL w) const; - - inline unsigned char Index2D_12(unsigned char offset, int x, int y) const; - inline unsigned char Index3D_12(unsigned char offset, int x, int y, int z) const; - inline unsigned char Index4D_32(unsigned char offset, int x, int y, int z, int w) const; - inline unsigned char Index2D_256(unsigned char offset, int x, int y) const; - inline unsigned char Index3D_256(unsigned char offset, int x, int y, int z) const; - inline unsigned char Index4D_256(unsigned char offset, int x, int y, int z, int w) const; - - inline FN_DECIMAL ValCoord2DFast(unsigned char offset, int x, int y) const; - inline FN_DECIMAL ValCoord3DFast(unsigned char offset, int x, int y, int z) const; - inline FN_DECIMAL GradCoord2D(unsigned char offset, int x, int y, FN_DECIMAL xd, FN_DECIMAL yd) const; - inline FN_DECIMAL GradCoord3D(unsigned char offset, int x, int y, int z, FN_DECIMAL xd, FN_DECIMAL yd, FN_DECIMAL zd) const; - inline FN_DECIMAL GradCoord4D(unsigned char offset, int x, int y, int z, int w, FN_DECIMAL xd, FN_DECIMAL yd, FN_DECIMAL zd, FN_DECIMAL wd) const; -}; -#endif diff --git a/src/util/filereader.cpp b/src/util/filereader.cpp deleted file mode 100644 index 8228074..0000000 --- a/src/util/filereader.cpp +++ /dev/null @@ -1,15 +0,0 @@ -#include "filereader.hpp" - -#include - -FileReader::FileReader() { - -} - -std::string FileReader::LoadTextFromFile(std::string path) { - std::ifstream t(path); - std::string text((std::istreambuf_iterator(t)), - std::istreambuf_iterator()); - return text; -} - diff --git a/src/util/filereader.hpp b/src/util/filereader.hpp deleted file mode 100644 index dc1cf24..0000000 --- a/src/util/filereader.hpp +++ /dev/null @@ -1,14 +0,0 @@ -#ifndef MINECRAFT_UTIL_FILEREADER_H_ -#define MINECRAFT_UTIL_FILEREADER_H_ - -#include - -class FileReader { -public: - FileReader(); - - std::string LoadTextFromFile(std::string path); - -}; - -#endif diff --git a/src/util/glad.c b/src/util/glad.c deleted file mode 100644 index 5e04eda..0000000 --- a/src/util/glad.c +++ /dev/null @@ -1,1843 +0,0 @@ -/* - - OpenGL loader generated by glad 0.1.28 on Tue Jan 15 14:49:19 2019. - - Language/Generator: C/C++ - Specification: gl - APIs: gl=3.3 - Profile: compatibility - Extensions: - - Loader: True - Local files: False - Omit khrplatform: False - Reproducible: False - - Commandline: - --profile="compatibility" --api="gl=3.3" --generator="c" --spec="gl" --extensions="" - Online: - https://glad.dav1d.de/#profile=compatibility&language=c&specification=gl&loader=on&api=gl%3D3.3 -*/ - -#include -#include -#include -#include - -static void* get_proc(const char* namez); - -#if defined(_WIN32) || defined(__CYGWIN__) -#include -static HMODULE libGL; - -typedef void* (APIENTRYP PFNWGLGETPROCADDRESSPROC_PRIVATE)(const char*); -static PFNWGLGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr; - -#ifdef _MSC_VER -#ifdef __has_include -#if __has_include() -#define HAVE_WINAPIFAMILY 1 -#endif -#elif _MSC_VER >= 1700 && !_USING_V110_SDK71_ -#define HAVE_WINAPIFAMILY 1 -#endif -#endif - -#ifdef HAVE_WINAPIFAMILY -#include -#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP) -#define IS_UWP 1 -#endif -#endif - -static -int open_gl(void) { -#ifndef IS_UWP - libGL = LoadLibraryW(L"opengl32.dll"); - if (libGL != NULL) { - void (*tmp)(void); - tmp = (void(*)(void)) GetProcAddress(libGL, "wglGetProcAddress"); - gladGetProcAddressPtr = (PFNWGLGETPROCADDRESSPROC_PRIVATE)tmp; - return gladGetProcAddressPtr != NULL; - } -#endif - - return 0; -} - -static -void close_gl(void) { - if (libGL != NULL) { - FreeLibrary((HMODULE)libGL); - libGL = NULL; - } -} -#else -#include -static void* libGL; - -#if !defined(__APPLE__) && !defined(__HAIKU__) -typedef void* (APIENTRYP PFNGLXGETPROCADDRESSPROC_PRIVATE)(const char*); -static PFNGLXGETPROCADDRESSPROC_PRIVATE gladGetProcAddressPtr; -#endif - -static -int open_gl(void) { -#ifdef __APPLE__ - static const char* NAMES[] = { - "../Frameworks/OpenGL.framework/OpenGL", - "/Library/Frameworks/OpenGL.framework/OpenGL", - "/System/Library/Frameworks/OpenGL.framework/OpenGL", - "/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL" - }; -#else - static const char* NAMES[] = { "libGL.so.1", "libGL.so" }; -#endif - - unsigned int index = 0; - for (index = 0; index < (sizeof(NAMES) / sizeof(NAMES[0])); index++) { - libGL = dlopen(NAMES[index], RTLD_NOW | RTLD_GLOBAL); - - if (libGL != NULL) { -#if defined(__APPLE__) || defined(__HAIKU__) - return 1; -#else - gladGetProcAddressPtr = (PFNGLXGETPROCADDRESSPROC_PRIVATE)dlsym(libGL, - "glXGetProcAddressARB"); - return gladGetProcAddressPtr != NULL; -#endif - } - } - - return 0; -} - -static -void close_gl(void) { - if (libGL != NULL) { - dlclose(libGL); - libGL = NULL; - } -} -#endif - -static -void* get_proc(const char* namez) { - void* result = NULL; - if (libGL == NULL) return NULL; - -#if !defined(__APPLE__) && !defined(__HAIKU__) - if (gladGetProcAddressPtr != NULL) { - result = gladGetProcAddressPtr(namez); - } -#endif - if (result == NULL) { -#if defined(_WIN32) || defined(__CYGWIN__) - result = (void*)GetProcAddress((HMODULE)libGL, namez); -#else - result = dlsym(libGL, namez); -#endif - } - - return result; -} - -int gladLoadGL(void) { - int status = 0; - - if (open_gl()) { - status = gladLoadGLLoader(&get_proc); - close_gl(); - } - - return status; -} - -struct gladGLversionStruct GLVersion = { 0, 0 }; - -#if defined(GL_ES_VERSION_3_0) || defined(GL_VERSION_3_0) -#define _GLAD_IS_SOME_NEW_VERSION 1 -#endif - -static int max_loaded_major; -static int max_loaded_minor; - -static const char* exts = NULL; -static int num_exts_i = 0; -static char** exts_i = NULL; - -static int get_exts(void) { -#ifdef _GLAD_IS_SOME_NEW_VERSION - if (max_loaded_major < 3) { -#endif - exts = (const char*)glGetString(GL_EXTENSIONS); -#ifdef _GLAD_IS_SOME_NEW_VERSION - } - else { - unsigned int index; - - num_exts_i = 0; - glGetIntegerv(GL_NUM_EXTENSIONS, &num_exts_i); - if (num_exts_i > 0) { - char** tmp_exts_i = (char**)realloc((void*)exts_i, (size_t)num_exts_i * (sizeof * exts_i)); - if (tmp_exts_i == NULL) { - return 0; - } - exts_i = tmp_exts_i; - } - - if (exts_i == NULL) { - return 0; - } - - for (index = 0; index < (unsigned)num_exts_i; index++) { - const char* gl_str_tmp = (const char*)glGetStringi(GL_EXTENSIONS, index); - size_t len = strlen(gl_str_tmp); - - char* local_str = (char*)malloc((len + 1) * sizeof(char)); - if (local_str != NULL) { - memcpy(local_str, gl_str_tmp, (len + 1) * sizeof(char)); - } - exts_i[index] = local_str; - } - } -#endif - return 1; -} - -static void free_exts(void) { - if (exts_i != NULL) { - int index; - for (index = 0; index < num_exts_i; index++) { - free((char*)exts_i[index]); - } - free((void*)exts_i); - exts_i = NULL; - } -} - -static int has_ext(const char* ext) { -#ifdef _GLAD_IS_SOME_NEW_VERSION - if (max_loaded_major < 3) { -#endif - const char* extensions; - const char* loc; - const char* terminator; - extensions = exts; - if (extensions == NULL || ext == NULL) { - return 0; - } - - while (1) { - loc = strstr(extensions, ext); - if (loc == NULL) { - return 0; - } - - terminator = loc + strlen(ext); - if ((loc == extensions || *(loc - 1) == ' ') && - (*terminator == ' ' || *terminator == '\0')) { - return 1; - } - extensions = terminator; - } -#ifdef _GLAD_IS_SOME_NEW_VERSION - } - else { - int index; - if (exts_i == NULL) return 0; - for (index = 0; index < num_exts_i; index++) { - const char* e = exts_i[index]; - - if (exts_i[index] != NULL && strcmp(e, ext) == 0) { - return 1; - } - } - } -#endif - - return 0; -} -int GLAD_GL_VERSION_1_0 = 0; -int GLAD_GL_VERSION_1_1 = 0; -int GLAD_GL_VERSION_1_2 = 0; -int GLAD_GL_VERSION_1_3 = 0; -int GLAD_GL_VERSION_1_4 = 0; -int GLAD_GL_VERSION_1_5 = 0; -int GLAD_GL_VERSION_2_0 = 0; -int GLAD_GL_VERSION_2_1 = 0; -int GLAD_GL_VERSION_3_0 = 0; -int GLAD_GL_VERSION_3_1 = 0; -int GLAD_GL_VERSION_3_2 = 0; -int GLAD_GL_VERSION_3_3 = 0; -PFNGLACCUMPROC glad_glAccum = NULL; -PFNGLACTIVETEXTUREPROC glad_glActiveTexture = NULL; -PFNGLALPHAFUNCPROC glad_glAlphaFunc = NULL; -PFNGLARETEXTURESRESIDENTPROC glad_glAreTexturesResident = NULL; -PFNGLARRAYELEMENTPROC glad_glArrayElement = NULL; -PFNGLATTACHSHADERPROC glad_glAttachShader = NULL; -PFNGLBEGINPROC glad_glBegin = NULL; -PFNGLBEGINCONDITIONALRENDERPROC glad_glBeginConditionalRender = NULL; -PFNGLBEGINQUERYPROC glad_glBeginQuery = NULL; -PFNGLBEGINTRANSFORMFEEDBACKPROC glad_glBeginTransformFeedback = NULL; -PFNGLBINDATTRIBLOCATIONPROC glad_glBindAttribLocation = NULL; -PFNGLBINDBUFFERPROC glad_glBindBuffer = NULL; -PFNGLBINDBUFFERBASEPROC glad_glBindBufferBase = NULL; -PFNGLBINDBUFFERRANGEPROC glad_glBindBufferRange = NULL; -PFNGLBINDFRAGDATALOCATIONPROC glad_glBindFragDataLocation = NULL; -PFNGLBINDFRAGDATALOCATIONINDEXEDPROC glad_glBindFragDataLocationIndexed = NULL; -PFNGLBINDFRAMEBUFFERPROC glad_glBindFramebuffer = NULL; -PFNGLBINDRENDERBUFFERPROC glad_glBindRenderbuffer = NULL; -PFNGLBINDSAMPLERPROC glad_glBindSampler = NULL; -PFNGLBINDTEXTUREPROC glad_glBindTexture = NULL; -PFNGLBINDVERTEXARRAYPROC glad_glBindVertexArray = NULL; -PFNGLBITMAPPROC glad_glBitmap = NULL; -PFNGLBLENDCOLORPROC glad_glBlendColor = NULL; -PFNGLBLENDEQUATIONPROC glad_glBlendEquation = NULL; -PFNGLBLENDEQUATIONSEPARATEPROC glad_glBlendEquationSeparate = NULL; -PFNGLBLENDFUNCPROC glad_glBlendFunc = NULL; -PFNGLBLENDFUNCSEPARATEPROC glad_glBlendFuncSeparate = NULL; -PFNGLBLITFRAMEBUFFERPROC glad_glBlitFramebuffer = NULL; -PFNGLBUFFERDATAPROC glad_glBufferData = NULL; -PFNGLBUFFERSUBDATAPROC glad_glBufferSubData = NULL; -PFNGLCALLLISTPROC glad_glCallList = NULL; -PFNGLCALLLISTSPROC glad_glCallLists = NULL; -PFNGLCHECKFRAMEBUFFERSTATUSPROC glad_glCheckFramebufferStatus = NULL; -PFNGLCLAMPCOLORPROC glad_glClampColor = NULL; -PFNGLCLEARPROC glad_glClear = NULL; -PFNGLCLEARACCUMPROC glad_glClearAccum = NULL; -PFNGLCLEARBUFFERFIPROC glad_glClearBufferfi = NULL; -PFNGLCLEARBUFFERFVPROC glad_glClearBufferfv = NULL; -PFNGLCLEARBUFFERIVPROC glad_glClearBufferiv = NULL; -PFNGLCLEARBUFFERUIVPROC glad_glClearBufferuiv = NULL; -PFNGLCLEARCOLORPROC glad_glClearColor = NULL; -PFNGLCLEARDEPTHPROC glad_glClearDepth = NULL; -PFNGLCLEARINDEXPROC glad_glClearIndex = NULL; -PFNGLCLEARSTENCILPROC glad_glClearStencil = NULL; -PFNGLCLIENTACTIVETEXTUREPROC glad_glClientActiveTexture = NULL; -PFNGLCLIENTWAITSYNCPROC glad_glClientWaitSync = NULL; -PFNGLCLIPPLANEPROC glad_glClipPlane = NULL; -PFNGLCOLOR3BPROC glad_glColor3b = NULL; -PFNGLCOLOR3BVPROC glad_glColor3bv = NULL; -PFNGLCOLOR3DPROC glad_glColor3d = NULL; -PFNGLCOLOR3DVPROC glad_glColor3dv = NULL; -PFNGLCOLOR3FPROC glad_glColor3f = NULL; -PFNGLCOLOR3FVPROC glad_glColor3fv = NULL; -PFNGLCOLOR3IPROC glad_glColor3i = NULL; -PFNGLCOLOR3IVPROC glad_glColor3iv = NULL; -PFNGLCOLOR3SPROC glad_glColor3s = NULL; -PFNGLCOLOR3SVPROC glad_glColor3sv = NULL; -PFNGLCOLOR3UBPROC glad_glColor3ub = NULL; -PFNGLCOLOR3UBVPROC glad_glColor3ubv = NULL; -PFNGLCOLOR3UIPROC glad_glColor3ui = NULL; -PFNGLCOLOR3UIVPROC glad_glColor3uiv = NULL; -PFNGLCOLOR3USPROC glad_glColor3us = NULL; -PFNGLCOLOR3USVPROC glad_glColor3usv = NULL; -PFNGLCOLOR4BPROC glad_glColor4b = NULL; -PFNGLCOLOR4BVPROC glad_glColor4bv = NULL; -PFNGLCOLOR4DPROC glad_glColor4d = NULL; -PFNGLCOLOR4DVPROC glad_glColor4dv = NULL; -PFNGLCOLOR4FPROC glad_glColor4f = NULL; -PFNGLCOLOR4FVPROC glad_glColor4fv = NULL; -PFNGLCOLOR4IPROC glad_glColor4i = NULL; -PFNGLCOLOR4IVPROC glad_glColor4iv = NULL; -PFNGLCOLOR4SPROC glad_glColor4s = NULL; -PFNGLCOLOR4SVPROC glad_glColor4sv = NULL; -PFNGLCOLOR4UBPROC glad_glColor4ub = NULL; -PFNGLCOLOR4UBVPROC glad_glColor4ubv = NULL; -PFNGLCOLOR4UIPROC glad_glColor4ui = NULL; -PFNGLCOLOR4UIVPROC glad_glColor4uiv = NULL; -PFNGLCOLOR4USPROC glad_glColor4us = NULL; -PFNGLCOLOR4USVPROC glad_glColor4usv = NULL; -PFNGLCOLORMASKPROC glad_glColorMask = NULL; -PFNGLCOLORMASKIPROC glad_glColorMaski = NULL; -PFNGLCOLORMATERIALPROC glad_glColorMaterial = NULL; -PFNGLCOLORP3UIPROC glad_glColorP3ui = NULL; -PFNGLCOLORP3UIVPROC glad_glColorP3uiv = NULL; -PFNGLCOLORP4UIPROC glad_glColorP4ui = NULL; -PFNGLCOLORP4UIVPROC glad_glColorP4uiv = NULL; -PFNGLCOLORPOINTERPROC glad_glColorPointer = NULL; -PFNGLCOMPILESHADERPROC glad_glCompileShader = NULL; -PFNGLCOMPRESSEDTEXIMAGE1DPROC glad_glCompressedTexImage1D = NULL; -PFNGLCOMPRESSEDTEXIMAGE2DPROC glad_glCompressedTexImage2D = NULL; -PFNGLCOMPRESSEDTEXIMAGE3DPROC glad_glCompressedTexImage3D = NULL; -PFNGLCOMPRESSEDTEXSUBIMAGE1DPROC glad_glCompressedTexSubImage1D = NULL; -PFNGLCOMPRESSEDTEXSUBIMAGE2DPROC glad_glCompressedTexSubImage2D = NULL; -PFNGLCOMPRESSEDTEXSUBIMAGE3DPROC glad_glCompressedTexSubImage3D = NULL; -PFNGLCOPYBUFFERSUBDATAPROC glad_glCopyBufferSubData = NULL; -PFNGLCOPYPIXELSPROC glad_glCopyPixels = NULL; -PFNGLCOPYTEXIMAGE1DPROC glad_glCopyTexImage1D = NULL; -PFNGLCOPYTEXIMAGE2DPROC glad_glCopyTexImage2D = NULL; -PFNGLCOPYTEXSUBIMAGE1DPROC glad_glCopyTexSubImage1D = NULL; -PFNGLCOPYTEXSUBIMAGE2DPROC glad_glCopyTexSubImage2D = NULL; -PFNGLCOPYTEXSUBIMAGE3DPROC glad_glCopyTexSubImage3D = NULL; -PFNGLCREATEPROGRAMPROC glad_glCreateProgram = NULL; -PFNGLCREATESHADERPROC glad_glCreateShader = NULL; -PFNGLCULLFACEPROC glad_glCullFace = NULL; -PFNGLDELETEBUFFERSPROC glad_glDeleteBuffers = NULL; -PFNGLDELETEFRAMEBUFFERSPROC glad_glDeleteFramebuffers = NULL; -PFNGLDELETELISTSPROC glad_glDeleteLists = NULL; -PFNGLDELETEPROGRAMPROC glad_glDeleteProgram = NULL; -PFNGLDELETEQUERIESPROC glad_glDeleteQueries = NULL; -PFNGLDELETERENDERBUFFERSPROC glad_glDeleteRenderbuffers = NULL; -PFNGLDELETESAMPLERSPROC glad_glDeleteSamplers = NULL; -PFNGLDELETESHADERPROC glad_glDeleteShader = NULL; -PFNGLDELETESYNCPROC glad_glDeleteSync = NULL; -PFNGLDELETETEXTURESPROC glad_glDeleteTextures = NULL; -PFNGLDELETEVERTEXARRAYSPROC glad_glDeleteVertexArrays = NULL; -PFNGLDEPTHFUNCPROC glad_glDepthFunc = NULL; -PFNGLDEPTHMASKPROC glad_glDepthMask = NULL; -PFNGLDEPTHRANGEPROC glad_glDepthRange = NULL; -PFNGLDETACHSHADERPROC glad_glDetachShader = NULL; -PFNGLDISABLEPROC glad_glDisable = NULL; -PFNGLDISABLECLIENTSTATEPROC glad_glDisableClientState = NULL; -PFNGLDISABLEVERTEXATTRIBARRAYPROC glad_glDisableVertexAttribArray = NULL; -PFNGLDISABLEIPROC glad_glDisablei = NULL; -PFNGLDRAWARRAYSPROC glad_glDrawArrays = NULL; -PFNGLDRAWARRAYSINSTANCEDPROC glad_glDrawArraysInstanced = NULL; -PFNGLDRAWBUFFERPROC glad_glDrawBuffer = NULL; -PFNGLDRAWBUFFERSPROC glad_glDrawBuffers = NULL; -PFNGLDRAWELEMENTSPROC glad_glDrawElements = NULL; -PFNGLDRAWELEMENTSBASEVERTEXPROC glad_glDrawElementsBaseVertex = NULL; -PFNGLDRAWELEMENTSINSTANCEDPROC glad_glDrawElementsInstanced = NULL; -PFNGLDRAWELEMENTSINSTANCEDBASEVERTEXPROC glad_glDrawElementsInstancedBaseVertex = NULL; -PFNGLDRAWPIXELSPROC glad_glDrawPixels = NULL; -PFNGLDRAWRANGEELEMENTSPROC glad_glDrawRangeElements = NULL; -PFNGLDRAWRANGEELEMENTSBASEVERTEXPROC glad_glDrawRangeElementsBaseVertex = NULL; -PFNGLEDGEFLAGPROC glad_glEdgeFlag = NULL; -PFNGLEDGEFLAGPOINTERPROC glad_glEdgeFlagPointer = NULL; -PFNGLEDGEFLAGVPROC glad_glEdgeFlagv = NULL; -PFNGLENABLEPROC glad_glEnable = NULL; -PFNGLENABLECLIENTSTATEPROC glad_glEnableClientState = NULL; -PFNGLENABLEVERTEXATTRIBARRAYPROC glad_glEnableVertexAttribArray = NULL; -PFNGLENABLEIPROC glad_glEnablei = NULL; -PFNGLENDPROC glad_glEnd = NULL; -PFNGLENDCONDITIONALRENDERPROC glad_glEndConditionalRender = NULL; -PFNGLENDLISTPROC glad_glEndList = NULL; -PFNGLENDQUERYPROC glad_glEndQuery = NULL; -PFNGLENDTRANSFORMFEEDBACKPROC glad_glEndTransformFeedback = NULL; -PFNGLEVALCOORD1DPROC glad_glEvalCoord1d = NULL; -PFNGLEVALCOORD1DVPROC glad_glEvalCoord1dv = NULL; -PFNGLEVALCOORD1FPROC glad_glEvalCoord1f = NULL; -PFNGLEVALCOORD1FVPROC glad_glEvalCoord1fv = NULL; -PFNGLEVALCOORD2DPROC glad_glEvalCoord2d = NULL; -PFNGLEVALCOORD2DVPROC glad_glEvalCoord2dv = NULL; -PFNGLEVALCOORD2FPROC glad_glEvalCoord2f = NULL; -PFNGLEVALCOORD2FVPROC glad_glEvalCoord2fv = NULL; -PFNGLEVALMESH1PROC glad_glEvalMesh1 = NULL; -PFNGLEVALMESH2PROC glad_glEvalMesh2 = NULL; -PFNGLEVALPOINT1PROC glad_glEvalPoint1 = NULL; -PFNGLEVALPOINT2PROC glad_glEvalPoint2 = NULL; -PFNGLFEEDBACKBUFFERPROC glad_glFeedbackBuffer = NULL; -PFNGLFENCESYNCPROC glad_glFenceSync = NULL; -PFNGLFINISHPROC glad_glFinish = NULL; -PFNGLFLUSHPROC glad_glFlush = NULL; -PFNGLFLUSHMAPPEDBUFFERRANGEPROC glad_glFlushMappedBufferRange = NULL; -PFNGLFOGCOORDPOINTERPROC glad_glFogCoordPointer = NULL; -PFNGLFOGCOORDDPROC glad_glFogCoordd = NULL; -PFNGLFOGCOORDDVPROC glad_glFogCoorddv = NULL; -PFNGLFOGCOORDFPROC glad_glFogCoordf = NULL; -PFNGLFOGCOORDFVPROC glad_glFogCoordfv = NULL; -PFNGLFOGFPROC glad_glFogf = NULL; -PFNGLFOGFVPROC glad_glFogfv = NULL; -PFNGLFOGIPROC glad_glFogi = NULL; -PFNGLFOGIVPROC glad_glFogiv = NULL; -PFNGLFRAMEBUFFERRENDERBUFFERPROC glad_glFramebufferRenderbuffer = NULL; -PFNGLFRAMEBUFFERTEXTUREPROC glad_glFramebufferTexture = NULL; -PFNGLFRAMEBUFFERTEXTURE1DPROC glad_glFramebufferTexture1D = NULL; -PFNGLFRAMEBUFFERTEXTURE2DPROC glad_glFramebufferTexture2D = NULL; -PFNGLFRAMEBUFFERTEXTURE3DPROC glad_glFramebufferTexture3D = NULL; -PFNGLFRAMEBUFFERTEXTURELAYERPROC glad_glFramebufferTextureLayer = NULL; -PFNGLFRONTFACEPROC glad_glFrontFace = NULL; -PFNGLFRUSTUMPROC glad_glFrustum = NULL; -PFNGLGENBUFFERSPROC glad_glGenBuffers = NULL; -PFNGLGENFRAMEBUFFERSPROC glad_glGenFramebuffers = NULL; -PFNGLGENLISTSPROC glad_glGenLists = NULL; -PFNGLGENQUERIESPROC glad_glGenQueries = NULL; -PFNGLGENRENDERBUFFERSPROC glad_glGenRenderbuffers = NULL; -PFNGLGENSAMPLERSPROC glad_glGenSamplers = NULL; -PFNGLGENTEXTURESPROC glad_glGenTextures = NULL; -PFNGLGENVERTEXARRAYSPROC glad_glGenVertexArrays = NULL; -PFNGLGENERATEMIPMAPPROC glad_glGenerateMipmap = NULL; -PFNGLGETACTIVEATTRIBPROC glad_glGetActiveAttrib = NULL; -PFNGLGETACTIVEUNIFORMPROC glad_glGetActiveUniform = NULL; -PFNGLGETACTIVEUNIFORMBLOCKNAMEPROC glad_glGetActiveUniformBlockName = NULL; -PFNGLGETACTIVEUNIFORMBLOCKIVPROC glad_glGetActiveUniformBlockiv = NULL; -PFNGLGETACTIVEUNIFORMNAMEPROC glad_glGetActiveUniformName = NULL; -PFNGLGETACTIVEUNIFORMSIVPROC glad_glGetActiveUniformsiv = NULL; -PFNGLGETATTACHEDSHADERSPROC glad_glGetAttachedShaders = NULL; -PFNGLGETATTRIBLOCATIONPROC glad_glGetAttribLocation = NULL; -PFNGLGETBOOLEANI_VPROC glad_glGetBooleani_v = NULL; -PFNGLGETBOOLEANVPROC glad_glGetBooleanv = NULL; -PFNGLGETBUFFERPARAMETERI64VPROC glad_glGetBufferParameteri64v = NULL; -PFNGLGETBUFFERPARAMETERIVPROC glad_glGetBufferParameteriv = NULL; -PFNGLGETBUFFERPOINTERVPROC glad_glGetBufferPointerv = NULL; -PFNGLGETBUFFERSUBDATAPROC glad_glGetBufferSubData = NULL; -PFNGLGETCLIPPLANEPROC glad_glGetClipPlane = NULL; -PFNGLGETCOMPRESSEDTEXIMAGEPROC glad_glGetCompressedTexImage = NULL; -PFNGLGETDOUBLEVPROC glad_glGetDoublev = NULL; -PFNGLGETERRORPROC glad_glGetError = NULL; -PFNGLGETFLOATVPROC glad_glGetFloatv = NULL; -PFNGLGETFRAGDATAINDEXPROC glad_glGetFragDataIndex = NULL; -PFNGLGETFRAGDATALOCATIONPROC glad_glGetFragDataLocation = NULL; -PFNGLGETFRAMEBUFFERATTACHMENTPARAMETERIVPROC glad_glGetFramebufferAttachmentParameteriv = NULL; -PFNGLGETINTEGER64I_VPROC glad_glGetInteger64i_v = NULL; -PFNGLGETINTEGER64VPROC glad_glGetInteger64v = NULL; -PFNGLGETINTEGERI_VPROC glad_glGetIntegeri_v = NULL; -PFNGLGETINTEGERVPROC glad_glGetIntegerv = NULL; -PFNGLGETLIGHTFVPROC glad_glGetLightfv = NULL; -PFNGLGETLIGHTIVPROC glad_glGetLightiv = NULL; -PFNGLGETMAPDVPROC glad_glGetMapdv = NULL; -PFNGLGETMAPFVPROC glad_glGetMapfv = NULL; -PFNGLGETMAPIVPROC glad_glGetMapiv = NULL; -PFNGLGETMATERIALFVPROC glad_glGetMaterialfv = NULL; -PFNGLGETMATERIALIVPROC glad_glGetMaterialiv = NULL; -PFNGLGETMULTISAMPLEFVPROC glad_glGetMultisamplefv = NULL; -PFNGLGETPIXELMAPFVPROC glad_glGetPixelMapfv = NULL; -PFNGLGETPIXELMAPUIVPROC glad_glGetPixelMapuiv = NULL; -PFNGLGETPIXELMAPUSVPROC glad_glGetPixelMapusv = NULL; -PFNGLGETPOINTERVPROC glad_glGetPointerv = NULL; -PFNGLGETPOLYGONSTIPPLEPROC glad_glGetPolygonStipple = NULL; -PFNGLGETPROGRAMINFOLOGPROC glad_glGetProgramInfoLog = NULL; -PFNGLGETPROGRAMIVPROC glad_glGetProgramiv = NULL; -PFNGLGETQUERYOBJECTI64VPROC glad_glGetQueryObjecti64v = NULL; -PFNGLGETQUERYOBJECTIVPROC glad_glGetQueryObjectiv = NULL; -PFNGLGETQUERYOBJECTUI64VPROC glad_glGetQueryObjectui64v = NULL; -PFNGLGETQUERYOBJECTUIVPROC glad_glGetQueryObjectuiv = NULL; -PFNGLGETQUERYIVPROC glad_glGetQueryiv = NULL; -PFNGLGETRENDERBUFFERPARAMETERIVPROC glad_glGetRenderbufferParameteriv = NULL; -PFNGLGETSAMPLERPARAMETERIIVPROC glad_glGetSamplerParameterIiv = NULL; -PFNGLGETSAMPLERPARAMETERIUIVPROC glad_glGetSamplerParameterIuiv = NULL; -PFNGLGETSAMPLERPARAMETERFVPROC glad_glGetSamplerParameterfv = NULL; -PFNGLGETSAMPLERPARAMETERIVPROC glad_glGetSamplerParameteriv = NULL; -PFNGLGETSHADERINFOLOGPROC glad_glGetShaderInfoLog = NULL; -PFNGLGETSHADERSOURCEPROC glad_glGetShaderSource = NULL; -PFNGLGETSHADERIVPROC glad_glGetShaderiv = NULL; -PFNGLGETSTRINGPROC glad_glGetString = NULL; -PFNGLGETSTRINGIPROC glad_glGetStringi = NULL; -PFNGLGETSYNCIVPROC glad_glGetSynciv = NULL; -PFNGLGETTEXENVFVPROC glad_glGetTexEnvfv = NULL; -PFNGLGETTEXENVIVPROC glad_glGetTexEnviv = NULL; -PFNGLGETTEXGENDVPROC glad_glGetTexGendv = NULL; -PFNGLGETTEXGENFVPROC glad_glGetTexGenfv = NULL; -PFNGLGETTEXGENIVPROC glad_glGetTexGeniv = NULL; -PFNGLGETTEXIMAGEPROC glad_glGetTexImage = NULL; -PFNGLGETTEXLEVELPARAMETERFVPROC glad_glGetTexLevelParameterfv = NULL; -PFNGLGETTEXLEVELPARAMETERIVPROC glad_glGetTexLevelParameteriv = NULL; -PFNGLGETTEXPARAMETERIIVPROC glad_glGetTexParameterIiv = NULL; -PFNGLGETTEXPARAMETERIUIVPROC glad_glGetTexParameterIuiv = NULL; -PFNGLGETTEXPARAMETERFVPROC glad_glGetTexParameterfv = NULL; -PFNGLGETTEXPARAMETERIVPROC glad_glGetTexParameteriv = NULL; -PFNGLGETTRANSFORMFEEDBACKVARYINGPROC glad_glGetTransformFeedbackVarying = NULL; -PFNGLGETUNIFORMBLOCKINDEXPROC glad_glGetUniformBlockIndex = NULL; -PFNGLGETUNIFORMINDICESPROC glad_glGetUniformIndices = NULL; -PFNGLGETUNIFORMLOCATIONPROC glad_glGetUniformLocation = NULL; -PFNGLGETUNIFORMFVPROC glad_glGetUniformfv = NULL; -PFNGLGETUNIFORMIVPROC glad_glGetUniformiv = NULL; -PFNGLGETUNIFORMUIVPROC glad_glGetUniformuiv = NULL; -PFNGLGETVERTEXATTRIBIIVPROC glad_glGetVertexAttribIiv = NULL; -PFNGLGETVERTEXATTRIBIUIVPROC glad_glGetVertexAttribIuiv = NULL; -PFNGLGETVERTEXATTRIBPOINTERVPROC glad_glGetVertexAttribPointerv = NULL; -PFNGLGETVERTEXATTRIBDVPROC glad_glGetVertexAttribdv = NULL; -PFNGLGETVERTEXATTRIBFVPROC glad_glGetVertexAttribfv = NULL; -PFNGLGETVERTEXATTRIBIVPROC glad_glGetVertexAttribiv = NULL; -PFNGLHINTPROC glad_glHint = NULL; -PFNGLINDEXMASKPROC glad_glIndexMask = NULL; -PFNGLINDEXPOINTERPROC glad_glIndexPointer = NULL; -PFNGLINDEXDPROC glad_glIndexd = NULL; -PFNGLINDEXDVPROC glad_glIndexdv = NULL; -PFNGLINDEXFPROC glad_glIndexf = NULL; -PFNGLINDEXFVPROC glad_glIndexfv = NULL; -PFNGLINDEXIPROC glad_glIndexi = NULL; -PFNGLINDEXIVPROC glad_glIndexiv = NULL; -PFNGLINDEXSPROC glad_glIndexs = NULL; -PFNGLINDEXSVPROC glad_glIndexsv = NULL; -PFNGLINDEXUBPROC glad_glIndexub = NULL; -PFNGLINDEXUBVPROC glad_glIndexubv = NULL; -PFNGLINITNAMESPROC glad_glInitNames = NULL; -PFNGLINTERLEAVEDARRAYSPROC glad_glInterleavedArrays = NULL; -PFNGLISBUFFERPROC glad_glIsBuffer = NULL; -PFNGLISENABLEDPROC glad_glIsEnabled = NULL; -PFNGLISENABLEDIPROC glad_glIsEnabledi = NULL; -PFNGLISFRAMEBUFFERPROC glad_glIsFramebuffer = NULL; -PFNGLISLISTPROC glad_glIsList = NULL; -PFNGLISPROGRAMPROC glad_glIsProgram = NULL; -PFNGLISQUERYPROC glad_glIsQuery = NULL; -PFNGLISRENDERBUFFERPROC glad_glIsRenderbuffer = NULL; -PFNGLISSAMPLERPROC glad_glIsSampler = NULL; -PFNGLISSHADERPROC glad_glIsShader = NULL; -PFNGLISSYNCPROC glad_glIsSync = NULL; -PFNGLISTEXTUREPROC glad_glIsTexture = NULL; -PFNGLISVERTEXARRAYPROC glad_glIsVertexArray = NULL; -PFNGLLIGHTMODELFPROC glad_glLightModelf = NULL; -PFNGLLIGHTMODELFVPROC glad_glLightModelfv = NULL; -PFNGLLIGHTMODELIPROC glad_glLightModeli = NULL; -PFNGLLIGHTMODELIVPROC glad_glLightModeliv = NULL; -PFNGLLIGHTFPROC glad_glLightf = NULL; -PFNGLLIGHTFVPROC glad_glLightfv = NULL; -PFNGLLIGHTIPROC glad_glLighti = NULL; -PFNGLLIGHTIVPROC glad_glLightiv = NULL; -PFNGLLINESTIPPLEPROC glad_glLineStipple = NULL; -PFNGLLINEWIDTHPROC glad_glLineWidth = NULL; -PFNGLLINKPROGRAMPROC glad_glLinkProgram = NULL; -PFNGLLISTBASEPROC glad_glListBase = NULL; -PFNGLLOADIDENTITYPROC glad_glLoadIdentity = NULL; -PFNGLLOADMATRIXDPROC glad_glLoadMatrixd = NULL; -PFNGLLOADMATRIXFPROC glad_glLoadMatrixf = NULL; -PFNGLLOADNAMEPROC glad_glLoadName = NULL; -PFNGLLOADTRANSPOSEMATRIXDPROC glad_glLoadTransposeMatrixd = NULL; -PFNGLLOADTRANSPOSEMATRIXFPROC glad_glLoadTransposeMatrixf = NULL; -PFNGLLOGICOPPROC glad_glLogicOp = NULL; -PFNGLMAP1DPROC glad_glMap1d = NULL; -PFNGLMAP1FPROC glad_glMap1f = NULL; -PFNGLMAP2DPROC glad_glMap2d = NULL; -PFNGLMAP2FPROC glad_glMap2f = NULL; -PFNGLMAPBUFFERPROC glad_glMapBuffer = NULL; -PFNGLMAPBUFFERRANGEPROC glad_glMapBufferRange = NULL; -PFNGLMAPGRID1DPROC glad_glMapGrid1d = NULL; -PFNGLMAPGRID1FPROC glad_glMapGrid1f = NULL; -PFNGLMAPGRID2DPROC glad_glMapGrid2d = NULL; -PFNGLMAPGRID2FPROC glad_glMapGrid2f = NULL; -PFNGLMATERIALFPROC glad_glMaterialf = NULL; -PFNGLMATERIALFVPROC glad_glMaterialfv = NULL; -PFNGLMATERIALIPROC glad_glMateriali = NULL; -PFNGLMATERIALIVPROC glad_glMaterialiv = NULL; -PFNGLMATRIXMODEPROC glad_glMatrixMode = NULL; -PFNGLMULTMATRIXDPROC glad_glMultMatrixd = NULL; -PFNGLMULTMATRIXFPROC glad_glMultMatrixf = NULL; -PFNGLMULTTRANSPOSEMATRIXDPROC glad_glMultTransposeMatrixd = NULL; -PFNGLMULTTRANSPOSEMATRIXFPROC glad_glMultTransposeMatrixf = NULL; -PFNGLMULTIDRAWARRAYSPROC glad_glMultiDrawArrays = NULL; -PFNGLMULTIDRAWELEMENTSPROC glad_glMultiDrawElements = NULL; -PFNGLMULTIDRAWELEMENTSBASEVERTEXPROC glad_glMultiDrawElementsBaseVertex = NULL; -PFNGLMULTITEXCOORD1DPROC glad_glMultiTexCoord1d = NULL; -PFNGLMULTITEXCOORD1DVPROC glad_glMultiTexCoord1dv = NULL; -PFNGLMULTITEXCOORD1FPROC glad_glMultiTexCoord1f = NULL; -PFNGLMULTITEXCOORD1FVPROC glad_glMultiTexCoord1fv = NULL; -PFNGLMULTITEXCOORD1IPROC glad_glMultiTexCoord1i = NULL; -PFNGLMULTITEXCOORD1IVPROC glad_glMultiTexCoord1iv = NULL; -PFNGLMULTITEXCOORD1SPROC glad_glMultiTexCoord1s = NULL; -PFNGLMULTITEXCOORD1SVPROC glad_glMultiTexCoord1sv = NULL; -PFNGLMULTITEXCOORD2DPROC glad_glMultiTexCoord2d = NULL; -PFNGLMULTITEXCOORD2DVPROC glad_glMultiTexCoord2dv = NULL; -PFNGLMULTITEXCOORD2FPROC glad_glMultiTexCoord2f = NULL; -PFNGLMULTITEXCOORD2FVPROC glad_glMultiTexCoord2fv = NULL; -PFNGLMULTITEXCOORD2IPROC glad_glMultiTexCoord2i = NULL; -PFNGLMULTITEXCOORD2IVPROC glad_glMultiTexCoord2iv = NULL; -PFNGLMULTITEXCOORD2SPROC glad_glMultiTexCoord2s = NULL; -PFNGLMULTITEXCOORD2SVPROC glad_glMultiTexCoord2sv = NULL; -PFNGLMULTITEXCOORD3DPROC glad_glMultiTexCoord3d = NULL; -PFNGLMULTITEXCOORD3DVPROC glad_glMultiTexCoord3dv = NULL; -PFNGLMULTITEXCOORD3FPROC glad_glMultiTexCoord3f = NULL; -PFNGLMULTITEXCOORD3FVPROC glad_glMultiTexCoord3fv = NULL; -PFNGLMULTITEXCOORD3IPROC glad_glMultiTexCoord3i = NULL; -PFNGLMULTITEXCOORD3IVPROC glad_glMultiTexCoord3iv = NULL; -PFNGLMULTITEXCOORD3SPROC glad_glMultiTexCoord3s = NULL; -PFNGLMULTITEXCOORD3SVPROC glad_glMultiTexCoord3sv = NULL; -PFNGLMULTITEXCOORD4DPROC glad_glMultiTexCoord4d = NULL; -PFNGLMULTITEXCOORD4DVPROC glad_glMultiTexCoord4dv = NULL; -PFNGLMULTITEXCOORD4FPROC glad_glMultiTexCoord4f = NULL; -PFNGLMULTITEXCOORD4FVPROC glad_glMultiTexCoord4fv = NULL; -PFNGLMULTITEXCOORD4IPROC glad_glMultiTexCoord4i = NULL; -PFNGLMULTITEXCOORD4IVPROC glad_glMultiTexCoord4iv = NULL; -PFNGLMULTITEXCOORD4SPROC glad_glMultiTexCoord4s = NULL; -PFNGLMULTITEXCOORD4SVPROC glad_glMultiTexCoord4sv = NULL; -PFNGLMULTITEXCOORDP1UIPROC glad_glMultiTexCoordP1ui = NULL; -PFNGLMULTITEXCOORDP1UIVPROC glad_glMultiTexCoordP1uiv = NULL; -PFNGLMULTITEXCOORDP2UIPROC glad_glMultiTexCoordP2ui = NULL; -PFNGLMULTITEXCOORDP2UIVPROC glad_glMultiTexCoordP2uiv = NULL; -PFNGLMULTITEXCOORDP3UIPROC glad_glMultiTexCoordP3ui = NULL; -PFNGLMULTITEXCOORDP3UIVPROC glad_glMultiTexCoordP3uiv = NULL; -PFNGLMULTITEXCOORDP4UIPROC glad_glMultiTexCoordP4ui = NULL; -PFNGLMULTITEXCOORDP4UIVPROC glad_glMultiTexCoordP4uiv = NULL; -PFNGLNEWLISTPROC glad_glNewList = NULL; -PFNGLNORMAL3BPROC glad_glNormal3b = NULL; -PFNGLNORMAL3BVPROC glad_glNormal3bv = NULL; -PFNGLNORMAL3DPROC glad_glNormal3d = NULL; -PFNGLNORMAL3DVPROC glad_glNormal3dv = NULL; -PFNGLNORMAL3FPROC glad_glNormal3f = NULL; -PFNGLNORMAL3FVPROC glad_glNormal3fv = NULL; -PFNGLNORMAL3IPROC glad_glNormal3i = NULL; -PFNGLNORMAL3IVPROC glad_glNormal3iv = NULL; -PFNGLNORMAL3SPROC glad_glNormal3s = NULL; -PFNGLNORMAL3SVPROC glad_glNormal3sv = NULL; -PFNGLNORMALP3UIPROC glad_glNormalP3ui = NULL; -PFNGLNORMALP3UIVPROC glad_glNormalP3uiv = NULL; -PFNGLNORMALPOINTERPROC glad_glNormalPointer = NULL; -PFNGLORTHOPROC glad_glOrtho = NULL; -PFNGLPASSTHROUGHPROC glad_glPassThrough = NULL; -PFNGLPIXELMAPFVPROC glad_glPixelMapfv = NULL; -PFNGLPIXELMAPUIVPROC glad_glPixelMapuiv = NULL; -PFNGLPIXELMAPUSVPROC glad_glPixelMapusv = NULL; -PFNGLPIXELSTOREFPROC glad_glPixelStoref = NULL; -PFNGLPIXELSTOREIPROC glad_glPixelStorei = NULL; -PFNGLPIXELTRANSFERFPROC glad_glPixelTransferf = NULL; -PFNGLPIXELTRANSFERIPROC glad_glPixelTransferi = NULL; -PFNGLPIXELZOOMPROC glad_glPixelZoom = NULL; -PFNGLPOINTPARAMETERFPROC glad_glPointParameterf = NULL; -PFNGLPOINTPARAMETERFVPROC glad_glPointParameterfv = NULL; -PFNGLPOINTPARAMETERIPROC glad_glPointParameteri = NULL; -PFNGLPOINTPARAMETERIVPROC glad_glPointParameteriv = NULL; -PFNGLPOINTSIZEPROC glad_glPointSize = NULL; -PFNGLPOLYGONMODEPROC glad_glPolygonMode = NULL; -PFNGLPOLYGONOFFSETPROC glad_glPolygonOffset = NULL; -PFNGLPOLYGONSTIPPLEPROC glad_glPolygonStipple = NULL; -PFNGLPOPATTRIBPROC glad_glPopAttrib = NULL; -PFNGLPOPCLIENTATTRIBPROC glad_glPopClientAttrib = NULL; -PFNGLPOPMATRIXPROC glad_glPopMatrix = NULL; -PFNGLPOPNAMEPROC glad_glPopName = NULL; -PFNGLPRIMITIVERESTARTINDEXPROC glad_glPrimitiveRestartIndex = NULL; -PFNGLPRIORITIZETEXTURESPROC glad_glPrioritizeTextures = NULL; -PFNGLPROVOKINGVERTEXPROC glad_glProvokingVertex = NULL; -PFNGLPUSHATTRIBPROC glad_glPushAttrib = NULL; -PFNGLPUSHCLIENTATTRIBPROC glad_glPushClientAttrib = NULL; -PFNGLPUSHMATRIXPROC glad_glPushMatrix = NULL; -PFNGLPUSHNAMEPROC glad_glPushName = NULL; -PFNGLQUERYCOUNTERPROC glad_glQueryCounter = NULL; -PFNGLRASTERPOS2DPROC glad_glRasterPos2d = NULL; -PFNGLRASTERPOS2DVPROC glad_glRasterPos2dv = NULL; -PFNGLRASTERPOS2FPROC glad_glRasterPos2f = NULL; -PFNGLRASTERPOS2FVPROC glad_glRasterPos2fv = NULL; -PFNGLRASTERPOS2IPROC glad_glRasterPos2i = NULL; -PFNGLRASTERPOS2IVPROC glad_glRasterPos2iv = NULL; -PFNGLRASTERPOS2SPROC glad_glRasterPos2s = NULL; -PFNGLRASTERPOS2SVPROC glad_glRasterPos2sv = NULL; -PFNGLRASTERPOS3DPROC glad_glRasterPos3d = NULL; -PFNGLRASTERPOS3DVPROC glad_glRasterPos3dv = NULL; -PFNGLRASTERPOS3FPROC glad_glRasterPos3f = NULL; -PFNGLRASTERPOS3FVPROC glad_glRasterPos3fv = NULL; -PFNGLRASTERPOS3IPROC glad_glRasterPos3i = NULL; -PFNGLRASTERPOS3IVPROC glad_glRasterPos3iv = NULL; -PFNGLRASTERPOS3SPROC glad_glRasterPos3s = NULL; -PFNGLRASTERPOS3SVPROC glad_glRasterPos3sv = NULL; -PFNGLRASTERPOS4DPROC glad_glRasterPos4d = NULL; -PFNGLRASTERPOS4DVPROC glad_glRasterPos4dv = NULL; -PFNGLRASTERPOS4FPROC glad_glRasterPos4f = NULL; -PFNGLRASTERPOS4FVPROC glad_glRasterPos4fv = NULL; -PFNGLRASTERPOS4IPROC glad_glRasterPos4i = NULL; -PFNGLRASTERPOS4IVPROC glad_glRasterPos4iv = NULL; -PFNGLRASTERPOS4SPROC glad_glRasterPos4s = NULL; -PFNGLRASTERPOS4SVPROC glad_glRasterPos4sv = NULL; -PFNGLREADBUFFERPROC glad_glReadBuffer = NULL; -PFNGLREADPIXELSPROC glad_glReadPixels = NULL; -PFNGLRECTDPROC glad_glRectd = NULL; -PFNGLRECTDVPROC glad_glRectdv = NULL; -PFNGLRECTFPROC glad_glRectf = NULL; -PFNGLRECTFVPROC glad_glRectfv = NULL; -PFNGLRECTIPROC glad_glRecti = NULL; -PFNGLRECTIVPROC glad_glRectiv = NULL; -PFNGLRECTSPROC glad_glRects = NULL; -PFNGLRECTSVPROC glad_glRectsv = NULL; -PFNGLRENDERMODEPROC glad_glRenderMode = NULL; -PFNGLRENDERBUFFERSTORAGEPROC glad_glRenderbufferStorage = NULL; -PFNGLRENDERBUFFERSTORAGEMULTISAMPLEPROC glad_glRenderbufferStorageMultisample = NULL; -PFNGLROTATEDPROC glad_glRotated = NULL; -PFNGLROTATEFPROC glad_glRotatef = NULL; -PFNGLSAMPLECOVERAGEPROC glad_glSampleCoverage = NULL; -PFNGLSAMPLEMASKIPROC glad_glSampleMaski = NULL; -PFNGLSAMPLERPARAMETERIIVPROC glad_glSamplerParameterIiv = NULL; -PFNGLSAMPLERPARAMETERIUIVPROC glad_glSamplerParameterIuiv = NULL; -PFNGLSAMPLERPARAMETERFPROC glad_glSamplerParameterf = NULL; -PFNGLSAMPLERPARAMETERFVPROC glad_glSamplerParameterfv = NULL; -PFNGLSAMPLERPARAMETERIPROC glad_glSamplerParameteri = NULL; -PFNGLSAMPLERPARAMETERIVPROC glad_glSamplerParameteriv = NULL; -PFNGLSCALEDPROC glad_glScaled = NULL; -PFNGLSCALEFPROC glad_glScalef = NULL; -PFNGLSCISSORPROC glad_glScissor = NULL; -PFNGLSECONDARYCOLOR3BPROC glad_glSecondaryColor3b = NULL; -PFNGLSECONDARYCOLOR3BVPROC glad_glSecondaryColor3bv = NULL; -PFNGLSECONDARYCOLOR3DPROC glad_glSecondaryColor3d = NULL; -PFNGLSECONDARYCOLOR3DVPROC glad_glSecondaryColor3dv = NULL; -PFNGLSECONDARYCOLOR3FPROC glad_glSecondaryColor3f = NULL; -PFNGLSECONDARYCOLOR3FVPROC glad_glSecondaryColor3fv = NULL; -PFNGLSECONDARYCOLOR3IPROC glad_glSecondaryColor3i = NULL; -PFNGLSECONDARYCOLOR3IVPROC glad_glSecondaryColor3iv = NULL; -PFNGLSECONDARYCOLOR3SPROC glad_glSecondaryColor3s = NULL; -PFNGLSECONDARYCOLOR3SVPROC glad_glSecondaryColor3sv = NULL; -PFNGLSECONDARYCOLOR3UBPROC glad_glSecondaryColor3ub = NULL; -PFNGLSECONDARYCOLOR3UBVPROC glad_glSecondaryColor3ubv = NULL; -PFNGLSECONDARYCOLOR3UIPROC glad_glSecondaryColor3ui = NULL; -PFNGLSECONDARYCOLOR3UIVPROC glad_glSecondaryColor3uiv = NULL; -PFNGLSECONDARYCOLOR3USPROC glad_glSecondaryColor3us = NULL; -PFNGLSECONDARYCOLOR3USVPROC glad_glSecondaryColor3usv = NULL; -PFNGLSECONDARYCOLORP3UIPROC glad_glSecondaryColorP3ui = NULL; -PFNGLSECONDARYCOLORP3UIVPROC glad_glSecondaryColorP3uiv = NULL; -PFNGLSECONDARYCOLORPOINTERPROC glad_glSecondaryColorPointer = NULL; -PFNGLSELECTBUFFERPROC glad_glSelectBuffer = NULL; -PFNGLSHADEMODELPROC glad_glShadeModel = NULL; -PFNGLSHADERSOURCEPROC glad_glShaderSource = NULL; -PFNGLSTENCILFUNCPROC glad_glStencilFunc = NULL; -PFNGLSTENCILFUNCSEPARATEPROC glad_glStencilFuncSeparate = NULL; -PFNGLSTENCILMASKPROC glad_glStencilMask = NULL; -PFNGLSTENCILMASKSEPARATEPROC glad_glStencilMaskSeparate = NULL; -PFNGLSTENCILOPPROC glad_glStencilOp = NULL; -PFNGLSTENCILOPSEPARATEPROC glad_glStencilOpSeparate = NULL; -PFNGLTEXBUFFERPROC glad_glTexBuffer = NULL; -PFNGLTEXCOORD1DPROC glad_glTexCoord1d = NULL; -PFNGLTEXCOORD1DVPROC glad_glTexCoord1dv = NULL; -PFNGLTEXCOORD1FPROC glad_glTexCoord1f = NULL; -PFNGLTEXCOORD1FVPROC glad_glTexCoord1fv = NULL; -PFNGLTEXCOORD1IPROC glad_glTexCoord1i = NULL; -PFNGLTEXCOORD1IVPROC glad_glTexCoord1iv = NULL; -PFNGLTEXCOORD1SPROC glad_glTexCoord1s = NULL; -PFNGLTEXCOORD1SVPROC glad_glTexCoord1sv = NULL; -PFNGLTEXCOORD2DPROC glad_glTexCoord2d = NULL; -PFNGLTEXCOORD2DVPROC glad_glTexCoord2dv = NULL; -PFNGLTEXCOORD2FPROC glad_glTexCoord2f = NULL; -PFNGLTEXCOORD2FVPROC glad_glTexCoord2fv = NULL; -PFNGLTEXCOORD2IPROC glad_glTexCoord2i = NULL; -PFNGLTEXCOORD2IVPROC glad_glTexCoord2iv = NULL; -PFNGLTEXCOORD2SPROC glad_glTexCoord2s = NULL; -PFNGLTEXCOORD2SVPROC glad_glTexCoord2sv = NULL; -PFNGLTEXCOORD3DPROC glad_glTexCoord3d = NULL; -PFNGLTEXCOORD3DVPROC glad_glTexCoord3dv = NULL; -PFNGLTEXCOORD3FPROC glad_glTexCoord3f = NULL; -PFNGLTEXCOORD3FVPROC glad_glTexCoord3fv = NULL; -PFNGLTEXCOORD3IPROC glad_glTexCoord3i = NULL; -PFNGLTEXCOORD3IVPROC glad_glTexCoord3iv = NULL; -PFNGLTEXCOORD3SPROC glad_glTexCoord3s = NULL; -PFNGLTEXCOORD3SVPROC glad_glTexCoord3sv = NULL; -PFNGLTEXCOORD4DPROC glad_glTexCoord4d = NULL; -PFNGLTEXCOORD4DVPROC glad_glTexCoord4dv = NULL; -PFNGLTEXCOORD4FPROC glad_glTexCoord4f = NULL; -PFNGLTEXCOORD4FVPROC glad_glTexCoord4fv = NULL; -PFNGLTEXCOORD4IPROC glad_glTexCoord4i = NULL; -PFNGLTEXCOORD4IVPROC glad_glTexCoord4iv = NULL; -PFNGLTEXCOORD4SPROC glad_glTexCoord4s = NULL; -PFNGLTEXCOORD4SVPROC glad_glTexCoord4sv = NULL; -PFNGLTEXCOORDP1UIPROC glad_glTexCoordP1ui = NULL; -PFNGLTEXCOORDP1UIVPROC glad_glTexCoordP1uiv = NULL; -PFNGLTEXCOORDP2UIPROC glad_glTexCoordP2ui = NULL; -PFNGLTEXCOORDP2UIVPROC glad_glTexCoordP2uiv = NULL; -PFNGLTEXCOORDP3UIPROC glad_glTexCoordP3ui = NULL; -PFNGLTEXCOORDP3UIVPROC glad_glTexCoordP3uiv = NULL; -PFNGLTEXCOORDP4UIPROC glad_glTexCoordP4ui = NULL; -PFNGLTEXCOORDP4UIVPROC glad_glTexCoordP4uiv = NULL; -PFNGLTEXCOORDPOINTERPROC glad_glTexCoordPointer = NULL; -PFNGLTEXENVFPROC glad_glTexEnvf = NULL; -PFNGLTEXENVFVPROC glad_glTexEnvfv = NULL; -PFNGLTEXENVIPROC glad_glTexEnvi = NULL; -PFNGLTEXENVIVPROC glad_glTexEnviv = NULL; -PFNGLTEXGENDPROC glad_glTexGend = NULL; -PFNGLTEXGENDVPROC glad_glTexGendv = NULL; -PFNGLTEXGENFPROC glad_glTexGenf = NULL; -PFNGLTEXGENFVPROC glad_glTexGenfv = NULL; -PFNGLTEXGENIPROC glad_glTexGeni = NULL; -PFNGLTEXGENIVPROC glad_glTexGeniv = NULL; -PFNGLTEXIMAGE1DPROC glad_glTexImage1D = NULL; -PFNGLTEXIMAGE2DPROC glad_glTexImage2D = NULL; -PFNGLTEXIMAGE2DMULTISAMPLEPROC glad_glTexImage2DMultisample = NULL; -PFNGLTEXIMAGE3DPROC glad_glTexImage3D = NULL; -PFNGLTEXIMAGE3DMULTISAMPLEPROC glad_glTexImage3DMultisample = NULL; -PFNGLTEXPARAMETERIIVPROC glad_glTexParameterIiv = NULL; -PFNGLTEXPARAMETERIUIVPROC glad_glTexParameterIuiv = NULL; -PFNGLTEXPARAMETERFPROC glad_glTexParameterf = NULL; -PFNGLTEXPARAMETERFVPROC glad_glTexParameterfv = NULL; -PFNGLTEXPARAMETERIPROC glad_glTexParameteri = NULL; -PFNGLTEXPARAMETERIVPROC glad_glTexParameteriv = NULL; -PFNGLTEXSUBIMAGE1DPROC glad_glTexSubImage1D = NULL; -PFNGLTEXSUBIMAGE2DPROC glad_glTexSubImage2D = NULL; -PFNGLTEXSUBIMAGE3DPROC glad_glTexSubImage3D = NULL; -PFNGLTRANSFORMFEEDBACKVARYINGSPROC glad_glTransformFeedbackVaryings = NULL; -PFNGLTRANSLATEDPROC glad_glTranslated = NULL; -PFNGLTRANSLATEFPROC glad_glTranslatef = NULL; -PFNGLUNIFORM1FPROC glad_glUniform1f = NULL; -PFNGLUNIFORM1FVPROC glad_glUniform1fv = NULL; -PFNGLUNIFORM1IPROC glad_glUniform1i = NULL; -PFNGLUNIFORM1IVPROC glad_glUniform1iv = NULL; -PFNGLUNIFORM1UIPROC glad_glUniform1ui = NULL; -PFNGLUNIFORM1UIVPROC glad_glUniform1uiv = NULL; -PFNGLUNIFORM2FPROC glad_glUniform2f = NULL; -PFNGLUNIFORM2FVPROC glad_glUniform2fv = NULL; -PFNGLUNIFORM2IPROC glad_glUniform2i = NULL; -PFNGLUNIFORM2IVPROC glad_glUniform2iv = NULL; -PFNGLUNIFORM2UIPROC glad_glUniform2ui = NULL; -PFNGLUNIFORM2UIVPROC glad_glUniform2uiv = NULL; -PFNGLUNIFORM3FPROC glad_glUniform3f = NULL; -PFNGLUNIFORM3FVPROC glad_glUniform3fv = NULL; -PFNGLUNIFORM3IPROC glad_glUniform3i = NULL; -PFNGLUNIFORM3IVPROC glad_glUniform3iv = NULL; -PFNGLUNIFORM3UIPROC glad_glUniform3ui = NULL; -PFNGLUNIFORM3UIVPROC glad_glUniform3uiv = NULL; -PFNGLUNIFORM4FPROC glad_glUniform4f = NULL; -PFNGLUNIFORM4FVPROC glad_glUniform4fv = NULL; -PFNGLUNIFORM4IPROC glad_glUniform4i = NULL; -PFNGLUNIFORM4IVPROC glad_glUniform4iv = NULL; -PFNGLUNIFORM4UIPROC glad_glUniform4ui = NULL; -PFNGLUNIFORM4UIVPROC glad_glUniform4uiv = NULL; -PFNGLUNIFORMBLOCKBINDINGPROC glad_glUniformBlockBinding = NULL; -PFNGLUNIFORMMATRIX2FVPROC glad_glUniformMatrix2fv = NULL; -PFNGLUNIFORMMATRIX2X3FVPROC glad_glUniformMatrix2x3fv = NULL; -PFNGLUNIFORMMATRIX2X4FVPROC glad_glUniformMatrix2x4fv = NULL; -PFNGLUNIFORMMATRIX3FVPROC glad_glUniformMatrix3fv = NULL; -PFNGLUNIFORMMATRIX3X2FVPROC glad_glUniformMatrix3x2fv = NULL; -PFNGLUNIFORMMATRIX3X4FVPROC glad_glUniformMatrix3x4fv = NULL; -PFNGLUNIFORMMATRIX4FVPROC glad_glUniformMatrix4fv = NULL; -PFNGLUNIFORMMATRIX4X2FVPROC glad_glUniformMatrix4x2fv = NULL; -PFNGLUNIFORMMATRIX4X3FVPROC glad_glUniformMatrix4x3fv = NULL; -PFNGLUNMAPBUFFERPROC glad_glUnmapBuffer = NULL; -PFNGLUSEPROGRAMPROC glad_glUseProgram = NULL; -PFNGLVALIDATEPROGRAMPROC glad_glValidateProgram = NULL; -PFNGLVERTEX2DPROC glad_glVertex2d = NULL; -PFNGLVERTEX2DVPROC glad_glVertex2dv = NULL; -PFNGLVERTEX2FPROC glad_glVertex2f = NULL; -PFNGLVERTEX2FVPROC glad_glVertex2fv = NULL; -PFNGLVERTEX2IPROC glad_glVertex2i = NULL; -PFNGLVERTEX2IVPROC glad_glVertex2iv = NULL; -PFNGLVERTEX2SPROC glad_glVertex2s = NULL; -PFNGLVERTEX2SVPROC glad_glVertex2sv = NULL; -PFNGLVERTEX3DPROC glad_glVertex3d = NULL; -PFNGLVERTEX3DVPROC glad_glVertex3dv = NULL; -PFNGLVERTEX3FPROC glad_glVertex3f = NULL; -PFNGLVERTEX3FVPROC glad_glVertex3fv = NULL; -PFNGLVERTEX3IPROC glad_glVertex3i = NULL; -PFNGLVERTEX3IVPROC glad_glVertex3iv = NULL; -PFNGLVERTEX3SPROC glad_glVertex3s = NULL; -PFNGLVERTEX3SVPROC glad_glVertex3sv = NULL; -PFNGLVERTEX4DPROC glad_glVertex4d = NULL; -PFNGLVERTEX4DVPROC glad_glVertex4dv = NULL; -PFNGLVERTEX4FPROC glad_glVertex4f = NULL; -PFNGLVERTEX4FVPROC glad_glVertex4fv = NULL; -PFNGLVERTEX4IPROC glad_glVertex4i = NULL; -PFNGLVERTEX4IVPROC glad_glVertex4iv = NULL; -PFNGLVERTEX4SPROC glad_glVertex4s = NULL; -PFNGLVERTEX4SVPROC glad_glVertex4sv = NULL; -PFNGLVERTEXATTRIB1DPROC glad_glVertexAttrib1d = NULL; -PFNGLVERTEXATTRIB1DVPROC glad_glVertexAttrib1dv = NULL; -PFNGLVERTEXATTRIB1FPROC glad_glVertexAttrib1f = NULL; -PFNGLVERTEXATTRIB1FVPROC glad_glVertexAttrib1fv = NULL; -PFNGLVERTEXATTRIB1SPROC glad_glVertexAttrib1s = NULL; -PFNGLVERTEXATTRIB1SVPROC glad_glVertexAttrib1sv = NULL; -PFNGLVERTEXATTRIB2DPROC glad_glVertexAttrib2d = NULL; -PFNGLVERTEXATTRIB2DVPROC glad_glVertexAttrib2dv = NULL; -PFNGLVERTEXATTRIB2FPROC glad_glVertexAttrib2f = NULL; -PFNGLVERTEXATTRIB2FVPROC glad_glVertexAttrib2fv = NULL; -PFNGLVERTEXATTRIB2SPROC glad_glVertexAttrib2s = NULL; -PFNGLVERTEXATTRIB2SVPROC glad_glVertexAttrib2sv = NULL; -PFNGLVERTEXATTRIB3DPROC glad_glVertexAttrib3d = NULL; -PFNGLVERTEXATTRIB3DVPROC glad_glVertexAttrib3dv = NULL; -PFNGLVERTEXATTRIB3FPROC glad_glVertexAttrib3f = NULL; -PFNGLVERTEXATTRIB3FVPROC glad_glVertexAttrib3fv = NULL; -PFNGLVERTEXATTRIB3SPROC glad_glVertexAttrib3s = NULL; -PFNGLVERTEXATTRIB3SVPROC glad_glVertexAttrib3sv = NULL; -PFNGLVERTEXATTRIB4NBVPROC glad_glVertexAttrib4Nbv = NULL; -PFNGLVERTEXATTRIB4NIVPROC glad_glVertexAttrib4Niv = NULL; -PFNGLVERTEXATTRIB4NSVPROC glad_glVertexAttrib4Nsv = NULL; -PFNGLVERTEXATTRIB4NUBPROC glad_glVertexAttrib4Nub = NULL; -PFNGLVERTEXATTRIB4NUBVPROC glad_glVertexAttrib4Nubv = NULL; -PFNGLVERTEXATTRIB4NUIVPROC glad_glVertexAttrib4Nuiv = NULL; -PFNGLVERTEXATTRIB4NUSVPROC glad_glVertexAttrib4Nusv = NULL; -PFNGLVERTEXATTRIB4BVPROC glad_glVertexAttrib4bv = NULL; -PFNGLVERTEXATTRIB4DPROC glad_glVertexAttrib4d = NULL; -PFNGLVERTEXATTRIB4DVPROC glad_glVertexAttrib4dv = NULL; -PFNGLVERTEXATTRIB4FPROC glad_glVertexAttrib4f = NULL; -PFNGLVERTEXATTRIB4FVPROC glad_glVertexAttrib4fv = NULL; -PFNGLVERTEXATTRIB4IVPROC glad_glVertexAttrib4iv = NULL; -PFNGLVERTEXATTRIB4SPROC glad_glVertexAttrib4s = NULL; -PFNGLVERTEXATTRIB4SVPROC glad_glVertexAttrib4sv = NULL; -PFNGLVERTEXATTRIB4UBVPROC glad_glVertexAttrib4ubv = NULL; -PFNGLVERTEXATTRIB4UIVPROC glad_glVertexAttrib4uiv = NULL; -PFNGLVERTEXATTRIB4USVPROC glad_glVertexAttrib4usv = NULL; -PFNGLVERTEXATTRIBDIVISORPROC glad_glVertexAttribDivisor = NULL; -PFNGLVERTEXATTRIBI1IPROC glad_glVertexAttribI1i = NULL; -PFNGLVERTEXATTRIBI1IVPROC glad_glVertexAttribI1iv = NULL; -PFNGLVERTEXATTRIBI1UIPROC glad_glVertexAttribI1ui = NULL; -PFNGLVERTEXATTRIBI1UIVPROC glad_glVertexAttribI1uiv = NULL; -PFNGLVERTEXATTRIBI2IPROC glad_glVertexAttribI2i = NULL; -PFNGLVERTEXATTRIBI2IVPROC glad_glVertexAttribI2iv = NULL; -PFNGLVERTEXATTRIBI2UIPROC glad_glVertexAttribI2ui = NULL; -PFNGLVERTEXATTRIBI2UIVPROC glad_glVertexAttribI2uiv = NULL; -PFNGLVERTEXATTRIBI3IPROC glad_glVertexAttribI3i = NULL; -PFNGLVERTEXATTRIBI3IVPROC glad_glVertexAttribI3iv = NULL; -PFNGLVERTEXATTRIBI3UIPROC glad_glVertexAttribI3ui = NULL; -PFNGLVERTEXATTRIBI3UIVPROC glad_glVertexAttribI3uiv = NULL; -PFNGLVERTEXATTRIBI4BVPROC glad_glVertexAttribI4bv = NULL; -PFNGLVERTEXATTRIBI4IPROC glad_glVertexAttribI4i = NULL; -PFNGLVERTEXATTRIBI4IVPROC glad_glVertexAttribI4iv = NULL; -PFNGLVERTEXATTRIBI4SVPROC glad_glVertexAttribI4sv = NULL; -PFNGLVERTEXATTRIBI4UBVPROC glad_glVertexAttribI4ubv = NULL; -PFNGLVERTEXATTRIBI4UIPROC glad_glVertexAttribI4ui = NULL; -PFNGLVERTEXATTRIBI4UIVPROC glad_glVertexAttribI4uiv = NULL; -PFNGLVERTEXATTRIBI4USVPROC glad_glVertexAttribI4usv = NULL; -PFNGLVERTEXATTRIBIPOINTERPROC glad_glVertexAttribIPointer = NULL; -PFNGLVERTEXATTRIBP1UIPROC glad_glVertexAttribP1ui = NULL; -PFNGLVERTEXATTRIBP1UIVPROC glad_glVertexAttribP1uiv = NULL; -PFNGLVERTEXATTRIBP2UIPROC glad_glVertexAttribP2ui = NULL; -PFNGLVERTEXATTRIBP2UIVPROC glad_glVertexAttribP2uiv = NULL; -PFNGLVERTEXATTRIBP3UIPROC glad_glVertexAttribP3ui = NULL; -PFNGLVERTEXATTRIBP3UIVPROC glad_glVertexAttribP3uiv = NULL; -PFNGLVERTEXATTRIBP4UIPROC glad_glVertexAttribP4ui = NULL; -PFNGLVERTEXATTRIBP4UIVPROC glad_glVertexAttribP4uiv = NULL; -PFNGLVERTEXATTRIBPOINTERPROC glad_glVertexAttribPointer = NULL; -PFNGLVERTEXP2UIPROC glad_glVertexP2ui = NULL; -PFNGLVERTEXP2UIVPROC glad_glVertexP2uiv = NULL; -PFNGLVERTEXP3UIPROC glad_glVertexP3ui = NULL; -PFNGLVERTEXP3UIVPROC glad_glVertexP3uiv = NULL; -PFNGLVERTEXP4UIPROC glad_glVertexP4ui = NULL; -PFNGLVERTEXP4UIVPROC glad_glVertexP4uiv = NULL; -PFNGLVERTEXPOINTERPROC glad_glVertexPointer = NULL; -PFNGLVIEWPORTPROC glad_glViewport = NULL; -PFNGLWAITSYNCPROC glad_glWaitSync = NULL; -PFNGLWINDOWPOS2DPROC glad_glWindowPos2d = NULL; -PFNGLWINDOWPOS2DVPROC glad_glWindowPos2dv = NULL; -PFNGLWINDOWPOS2FPROC glad_glWindowPos2f = NULL; -PFNGLWINDOWPOS2FVPROC glad_glWindowPos2fv = NULL; -PFNGLWINDOWPOS2IPROC glad_glWindowPos2i = NULL; -PFNGLWINDOWPOS2IVPROC glad_glWindowPos2iv = NULL; -PFNGLWINDOWPOS2SPROC glad_glWindowPos2s = NULL; -PFNGLWINDOWPOS2SVPROC glad_glWindowPos2sv = NULL; -PFNGLWINDOWPOS3DPROC glad_glWindowPos3d = NULL; -PFNGLWINDOWPOS3DVPROC glad_glWindowPos3dv = NULL; -PFNGLWINDOWPOS3FPROC glad_glWindowPos3f = NULL; -PFNGLWINDOWPOS3FVPROC glad_glWindowPos3fv = NULL; -PFNGLWINDOWPOS3IPROC glad_glWindowPos3i = NULL; -PFNGLWINDOWPOS3IVPROC glad_glWindowPos3iv = NULL; -PFNGLWINDOWPOS3SPROC glad_glWindowPos3s = NULL; -PFNGLWINDOWPOS3SVPROC glad_glWindowPos3sv = NULL; -static void load_GL_VERSION_1_0(GLADloadproc load) { - if (!GLAD_GL_VERSION_1_0) return; - glad_glCullFace = (PFNGLCULLFACEPROC)load("glCullFace"); - glad_glFrontFace = (PFNGLFRONTFACEPROC)load("glFrontFace"); - glad_glHint = (PFNGLHINTPROC)load("glHint"); - glad_glLineWidth = (PFNGLLINEWIDTHPROC)load("glLineWidth"); - glad_glPointSize = (PFNGLPOINTSIZEPROC)load("glPointSize"); - glad_glPolygonMode = (PFNGLPOLYGONMODEPROC)load("glPolygonMode"); - glad_glScissor = (PFNGLSCISSORPROC)load("glScissor"); - glad_glTexParameterf = (PFNGLTEXPARAMETERFPROC)load("glTexParameterf"); - glad_glTexParameterfv = (PFNGLTEXPARAMETERFVPROC)load("glTexParameterfv"); - glad_glTexParameteri = (PFNGLTEXPARAMETERIPROC)load("glTexParameteri"); - glad_glTexParameteriv = (PFNGLTEXPARAMETERIVPROC)load("glTexParameteriv"); - glad_glTexImage1D = (PFNGLTEXIMAGE1DPROC)load("glTexImage1D"); - glad_glTexImage2D = (PFNGLTEXIMAGE2DPROC)load("glTexImage2D"); - glad_glDrawBuffer = (PFNGLDRAWBUFFERPROC)load("glDrawBuffer"); - glad_glClear = (PFNGLCLEARPROC)load("glClear"); - glad_glClearColor = (PFNGLCLEARCOLORPROC)load("glClearColor"); - glad_glClearStencil = (PFNGLCLEARSTENCILPROC)load("glClearStencil"); - glad_glClearDepth = (PFNGLCLEARDEPTHPROC)load("glClearDepth"); - glad_glStencilMask = (PFNGLSTENCILMASKPROC)load("glStencilMask"); - glad_glColorMask = (PFNGLCOLORMASKPROC)load("glColorMask"); - glad_glDepthMask = (PFNGLDEPTHMASKPROC)load("glDepthMask"); - glad_glDisable = (PFNGLDISABLEPROC)load("glDisable"); - glad_glEnable = (PFNGLENABLEPROC)load("glEnable"); - glad_glFinish = (PFNGLFINISHPROC)load("glFinish"); - glad_glFlush = (PFNGLFLUSHPROC)load("glFlush"); - glad_glBlendFunc = (PFNGLBLENDFUNCPROC)load("glBlendFunc"); - glad_glLogicOp = (PFNGLLOGICOPPROC)load("glLogicOp"); - glad_glStencilFunc = (PFNGLSTENCILFUNCPROC)load("glStencilFunc"); - glad_glStencilOp = (PFNGLSTENCILOPPROC)load("glStencilOp"); - glad_glDepthFunc = (PFNGLDEPTHFUNCPROC)load("glDepthFunc"); - glad_glPixelStoref = (PFNGLPIXELSTOREFPROC)load("glPixelStoref"); - glad_glPixelStorei = (PFNGLPIXELSTOREIPROC)load("glPixelStorei"); - glad_glReadBuffer = (PFNGLREADBUFFERPROC)load("glReadBuffer"); - glad_glReadPixels = (PFNGLREADPIXELSPROC)load("glReadPixels"); - glad_glGetBooleanv = (PFNGLGETBOOLEANVPROC)load("glGetBooleanv"); - glad_glGetDoublev = (PFNGLGETDOUBLEVPROC)load("glGetDoublev"); - glad_glGetError = (PFNGLGETERRORPROC)load("glGetError"); - glad_glGetFloatv = (PFNGLGETFLOATVPROC)load("glGetFloatv"); - glad_glGetIntegerv = (PFNGLGETINTEGERVPROC)load("glGetIntegerv"); - glad_glGetString = (PFNGLGETSTRINGPROC)load("glGetString"); - glad_glGetTexImage = (PFNGLGETTEXIMAGEPROC)load("glGetTexImage"); - glad_glGetTexParameterfv = (PFNGLGETTEXPARAMETERFVPROC)load("glGetTexParameterfv"); - glad_glGetTexParameteriv = (PFNGLGETTEXPARAMETERIVPROC)load("glGetTexParameteriv"); - glad_glGetTexLevelParameterfv = (PFNGLGETTEXLEVELPARAMETERFVPROC)load("glGetTexLevelParameterfv"); - glad_glGetTexLevelParameteriv = (PFNGLGETTEXLEVELPARAMETERIVPROC)load("glGetTexLevelParameteriv"); - glad_glIsEnabled = (PFNGLISENABLEDPROC)load("glIsEnabled"); - glad_glDepthRange = (PFNGLDEPTHRANGEPROC)load("glDepthRange"); - glad_glViewport = (PFNGLVIEWPORTPROC)load("glViewport"); - glad_glNewList = (PFNGLNEWLISTPROC)load("glNewList"); - glad_glEndList = (PFNGLENDLISTPROC)load("glEndList"); - glad_glCallList = (PFNGLCALLLISTPROC)load("glCallList"); - glad_glCallLists = (PFNGLCALLLISTSPROC)load("glCallLists"); - glad_glDeleteLists = (PFNGLDELETELISTSPROC)load("glDeleteLists"); - glad_glGenLists = (PFNGLGENLISTSPROC)load("glGenLists"); - glad_glListBase = (PFNGLLISTBASEPROC)load("glListBase"); - glad_glBegin = (PFNGLBEGINPROC)load("glBegin"); - glad_glBitmap = (PFNGLBITMAPPROC)load("glBitmap"); - glad_glColor3b = (PFNGLCOLOR3BPROC)load("glColor3b"); - glad_glColor3bv = (PFNGLCOLOR3BVPROC)load("glColor3bv"); - glad_glColor3d = (PFNGLCOLOR3DPROC)load("glColor3d"); - glad_glColor3dv = (PFNGLCOLOR3DVPROC)load("glColor3dv"); - glad_glColor3f = (PFNGLCOLOR3FPROC)load("glColor3f"); - glad_glColor3fv = (PFNGLCOLOR3FVPROC)load("glColor3fv"); - glad_glColor3i = (PFNGLCOLOR3IPROC)load("glColor3i"); - glad_glColor3iv = (PFNGLCOLOR3IVPROC)load("glColor3iv"); - glad_glColor3s = (PFNGLCOLOR3SPROC)load("glColor3s"); - glad_glColor3sv = (PFNGLCOLOR3SVPROC)load("glColor3sv"); - glad_glColor3ub = (PFNGLCOLOR3UBPROC)load("glColor3ub"); - glad_glColor3ubv = (PFNGLCOLOR3UBVPROC)load("glColor3ubv"); - glad_glColor3ui = (PFNGLCOLOR3UIPROC)load("glColor3ui"); - glad_glColor3uiv = (PFNGLCOLOR3UIVPROC)load("glColor3uiv"); - glad_glColor3us = (PFNGLCOLOR3USPROC)load("glColor3us"); - glad_glColor3usv = (PFNGLCOLOR3USVPROC)load("glColor3usv"); - glad_glColor4b = (PFNGLCOLOR4BPROC)load("glColor4b"); - glad_glColor4bv = (PFNGLCOLOR4BVPROC)load("glColor4bv"); - glad_glColor4d = (PFNGLCOLOR4DPROC)load("glColor4d"); - glad_glColor4dv = (PFNGLCOLOR4DVPROC)load("glColor4dv"); 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- glad_glIndexfv = (PFNGLINDEXFVPROC)load("glIndexfv"); - glad_glIndexi = (PFNGLINDEXIPROC)load("glIndexi"); - glad_glIndexiv = (PFNGLINDEXIVPROC)load("glIndexiv"); - glad_glIndexs = (PFNGLINDEXSPROC)load("glIndexs"); - glad_glIndexsv = (PFNGLINDEXSVPROC)load("glIndexsv"); - glad_glNormal3b = (PFNGLNORMAL3BPROC)load("glNormal3b"); - glad_glNormal3bv = (PFNGLNORMAL3BVPROC)load("glNormal3bv"); - glad_glNormal3d = (PFNGLNORMAL3DPROC)load("glNormal3d"); - glad_glNormal3dv = (PFNGLNORMAL3DVPROC)load("glNormal3dv"); - glad_glNormal3f = (PFNGLNORMAL3FPROC)load("glNormal3f"); - glad_glNormal3fv = (PFNGLNORMAL3FVPROC)load("glNormal3fv"); - glad_glNormal3i = (PFNGLNORMAL3IPROC)load("glNormal3i"); - glad_glNormal3iv = (PFNGLNORMAL3IVPROC)load("glNormal3iv"); - glad_glNormal3s = (PFNGLNORMAL3SPROC)load("glNormal3s"); - glad_glNormal3sv = (PFNGLNORMAL3SVPROC)load("glNormal3sv"); - glad_glRasterPos2d = (PFNGLRASTERPOS2DPROC)load("glRasterPos2d"); - glad_glRasterPos2dv = (PFNGLRASTERPOS2DVPROC)load("glRasterPos2dv"); 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- glad_glRasterPos4dv = (PFNGLRASTERPOS4DVPROC)load("glRasterPos4dv"); - glad_glRasterPos4f = (PFNGLRASTERPOS4FPROC)load("glRasterPos4f"); - glad_glRasterPos4fv = (PFNGLRASTERPOS4FVPROC)load("glRasterPos4fv"); - glad_glRasterPos4i = (PFNGLRASTERPOS4IPROC)load("glRasterPos4i"); - glad_glRasterPos4iv = (PFNGLRASTERPOS4IVPROC)load("glRasterPos4iv"); - glad_glRasterPos4s = (PFNGLRASTERPOS4SPROC)load("glRasterPos4s"); - glad_glRasterPos4sv = (PFNGLRASTERPOS4SVPROC)load("glRasterPos4sv"); - glad_glRectd = (PFNGLRECTDPROC)load("glRectd"); - glad_glRectdv = (PFNGLRECTDVPROC)load("glRectdv"); - glad_glRectf = (PFNGLRECTFPROC)load("glRectf"); - glad_glRectfv = (PFNGLRECTFVPROC)load("glRectfv"); - glad_glRecti = (PFNGLRECTIPROC)load("glRecti"); - glad_glRectiv = (PFNGLRECTIVPROC)load("glRectiv"); - glad_glRects = (PFNGLRECTSPROC)load("glRects"); - glad_glRectsv = (PFNGLRECTSVPROC)load("glRectsv"); - glad_glTexCoord1d = (PFNGLTEXCOORD1DPROC)load("glTexCoord1d"); - glad_glTexCoord1dv = (PFNGLTEXCOORD1DVPROC)load("glTexCoord1dv"); - glad_glTexCoord1f = (PFNGLTEXCOORD1FPROC)load("glTexCoord1f"); - glad_glTexCoord1fv = (PFNGLTEXCOORD1FVPROC)load("glTexCoord1fv"); - glad_glTexCoord1i = (PFNGLTEXCOORD1IPROC)load("glTexCoord1i"); - glad_glTexCoord1iv = (PFNGLTEXCOORD1IVPROC)load("glTexCoord1iv"); - glad_glTexCoord1s = (PFNGLTEXCOORD1SPROC)load("glTexCoord1s"); - glad_glTexCoord1sv = (PFNGLTEXCOORD1SVPROC)load("glTexCoord1sv"); - glad_glTexCoord2d = (PFNGLTEXCOORD2DPROC)load("glTexCoord2d"); - glad_glTexCoord2dv = (PFNGLTEXCOORD2DVPROC)load("glTexCoord2dv"); - glad_glTexCoord2f = (PFNGLTEXCOORD2FPROC)load("glTexCoord2f"); - glad_glTexCoord2fv = (PFNGLTEXCOORD2FVPROC)load("glTexCoord2fv"); - glad_glTexCoord2i = (PFNGLTEXCOORD2IPROC)load("glTexCoord2i"); - glad_glTexCoord2iv = (PFNGLTEXCOORD2IVPROC)load("glTexCoord2iv"); - glad_glTexCoord2s = (PFNGLTEXCOORD2SPROC)load("glTexCoord2s"); - glad_glTexCoord2sv = (PFNGLTEXCOORD2SVPROC)load("glTexCoord2sv"); - glad_glTexCoord3d = (PFNGLTEXCOORD3DPROC)load("glTexCoord3d"); - glad_glTexCoord3dv = (PFNGLTEXCOORD3DVPROC)load("glTexCoord3dv"); - glad_glTexCoord3f = (PFNGLTEXCOORD3FPROC)load("glTexCoord3f"); - glad_glTexCoord3fv = (PFNGLTEXCOORD3FVPROC)load("glTexCoord3fv"); - glad_glTexCoord3i = (PFNGLTEXCOORD3IPROC)load("glTexCoord3i"); - glad_glTexCoord3iv = (PFNGLTEXCOORD3IVPROC)load("glTexCoord3iv"); - glad_glTexCoord3s = (PFNGLTEXCOORD3SPROC)load("glTexCoord3s"); - glad_glTexCoord3sv = (PFNGLTEXCOORD3SVPROC)load("glTexCoord3sv"); - glad_glTexCoord4d = (PFNGLTEXCOORD4DPROC)load("glTexCoord4d"); - glad_glTexCoord4dv = (PFNGLTEXCOORD4DVPROC)load("glTexCoord4dv"); - glad_glTexCoord4f = (PFNGLTEXCOORD4FPROC)load("glTexCoord4f"); - glad_glTexCoord4fv = (PFNGLTEXCOORD4FVPROC)load("glTexCoord4fv"); - glad_glTexCoord4i = (PFNGLTEXCOORD4IPROC)load("glTexCoord4i"); - glad_glTexCoord4iv = (PFNGLTEXCOORD4IVPROC)load("glTexCoord4iv"); - glad_glTexCoord4s = (PFNGLTEXCOORD4SPROC)load("glTexCoord4s"); - glad_glTexCoord4sv = (PFNGLTEXCOORD4SVPROC)load("glTexCoord4sv"); - glad_glVertex2d = (PFNGLVERTEX2DPROC)load("glVertex2d"); - glad_glVertex2dv = (PFNGLVERTEX2DVPROC)load("glVertex2dv"); 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- glad_glTexGeniv = (PFNGLTEXGENIVPROC)load("glTexGeniv"); - glad_glFeedbackBuffer = (PFNGLFEEDBACKBUFFERPROC)load("glFeedbackBuffer"); - glad_glSelectBuffer = (PFNGLSELECTBUFFERPROC)load("glSelectBuffer"); - glad_glRenderMode = (PFNGLRENDERMODEPROC)load("glRenderMode"); - glad_glInitNames = (PFNGLINITNAMESPROC)load("glInitNames"); - glad_glLoadName = (PFNGLLOADNAMEPROC)load("glLoadName"); - glad_glPassThrough = (PFNGLPASSTHROUGHPROC)load("glPassThrough"); - glad_glPopName = (PFNGLPOPNAMEPROC)load("glPopName"); - glad_glPushName = (PFNGLPUSHNAMEPROC)load("glPushName"); - glad_glClearAccum = (PFNGLCLEARACCUMPROC)load("glClearAccum"); - glad_glClearIndex = (PFNGLCLEARINDEXPROC)load("glClearIndex"); - glad_glIndexMask = (PFNGLINDEXMASKPROC)load("glIndexMask"); - glad_glAccum = (PFNGLACCUMPROC)load("glAccum"); - glad_glPopAttrib = (PFNGLPOPATTRIBPROC)load("glPopAttrib"); - glad_glPushAttrib = (PFNGLPUSHATTRIBPROC)load("glPushAttrib"); - glad_glMap1d = (PFNGLMAP1DPROC)load("glMap1d"); - glad_glMap1f = (PFNGLMAP1FPROC)load("glMap1f"); 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- if (strncmp(version, prefixes[i], length) == 0) { - version += length; - break; - } - } - - /* PR #18 */ -#ifdef _MSC_VER - sscanf_s(version, "%d.%d", &major, &minor); -#else - sscanf(version, "%d.%d", &major, &minor); -#endif - - GLVersion.major = major; GLVersion.minor = minor; - max_loaded_major = major; max_loaded_minor = minor; - GLAD_GL_VERSION_1_0 = (major == 1 && minor >= 0) || major > 1; - GLAD_GL_VERSION_1_1 = (major == 1 && minor >= 1) || major > 1; - GLAD_GL_VERSION_1_2 = (major == 1 && minor >= 2) || major > 1; - GLAD_GL_VERSION_1_3 = (major == 1 && minor >= 3) || major > 1; - GLAD_GL_VERSION_1_4 = (major == 1 && minor >= 4) || major > 1; - GLAD_GL_VERSION_1_5 = (major == 1 && minor >= 5) || major > 1; - GLAD_GL_VERSION_2_0 = (major == 2 && minor >= 0) || major > 2; - GLAD_GL_VERSION_2_1 = (major == 2 && minor >= 1) || major > 2; - GLAD_GL_VERSION_3_0 = (major == 3 && minor >= 0) || major > 3; - GLAD_GL_VERSION_3_1 = (major == 3 && minor >= 1) || major > 3; - GLAD_GL_VERSION_3_2 = (major == 3 && minor >= 2) || major > 3; - GLAD_GL_VERSION_3_3 = (major == 3 && minor >= 3) || major > 3; - if (GLVersion.major > 3 || (GLVersion.major >= 3 && GLVersion.minor >= 3)) { - max_loaded_major = 3; - max_loaded_minor = 3; - } -} - -int gladLoadGLLoader(GLADloadproc load) { - GLVersion.major = 0; GLVersion.minor = 0; - glGetString = (PFNGLGETSTRINGPROC)load("glGetString"); - if (glGetString == NULL) return 0; - if (glGetString(GL_VERSION) == NULL) return 0; - find_coreGL(); - load_GL_VERSION_1_0(load); - load_GL_VERSION_1_1(load); - load_GL_VERSION_1_2(load); - load_GL_VERSION_1_3(load); - load_GL_VERSION_1_4(load); - load_GL_VERSION_1_5(load); - load_GL_VERSION_2_0(load); - load_GL_VERSION_2_1(load); - load_GL_VERSION_3_0(load); - load_GL_VERSION_3_1(load); - load_GL_VERSION_3_2(load); - load_GL_VERSION_3_3(load); - - if (!find_extensionsGL()) return 0; - return GLVersion.major != 0 || GLVersion.minor != 0; -} - diff --git a/src/util/stb_image.hpp b/src/util/stb_image.hpp deleted file mode 100644 index 764761a..0000000 --- a/src/util/stb_image.hpp +++ /dev/null @@ -1,7568 +0,0 @@ -/* stb_image - v2.19 - public domain image loader - http://nothings.org/stb - no warranty implied; use at your own risk - - Do this: - #define STB_IMAGE_IMPLEMENTATION - before you include this file in *one* C or C++ file to create the implementation. - - // i.e. it should look like this: - #include ... - #include ... - #include ... - #define STB_IMAGE_IMPLEMENTATION - #include "stb_image.h" - - You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. - And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free - - - QUICK NOTES: - Primarily of interest to game developers and other people who can - avoid problematic images and only need the trivial interface - - JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) - PNG 1/2/4/8/16-bit-per-channel - - TGA (not sure what subset, if a subset) - BMP non-1bpp, non-RLE - PSD (composited view only, no extra channels, 8/16 bit-per-channel) - - GIF (*comp always reports as 4-channel) - HDR (radiance rgbE format) - PIC (Softimage PIC) - PNM (PPM and PGM binary only) - - Animated GIF still needs a proper API, but here's one way to do it: - http://gist.github.com/urraka/685d9a6340b26b830d49 - - - decode from memory or through FILE (define STBI_NO_STDIO to remove code) - - decode from arbitrary I/O callbacks - - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) - - Full documentation under "DOCUMENTATION" below. - - -LICENSE - - See end of file for license information. - -RECENT REVISION HISTORY: - - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings - 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes - 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 - RGB-format JPEG; remove white matting in PSD; - allocate large structures on the stack; - correct channel count for PNG & BMP - 2.10 (2016-01-22) avoid warning introduced in 2.09 - 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED - - See end of file for full revision history. - - - ============================ Contributors ========================= - - Image formats Extensions, features - Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) - Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) - Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) - Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) - Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) - Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) - Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) - github:urraka (animated gif) Junggon Kim (PNM comments) - Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) - socks-the-fox (16-bit PNG) - Jeremy Sawicki (handle all ImageNet JPGs) - Optimizations & bugfixes Mikhail Morozov (1-bit BMP) - Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) - Arseny Kapoulkine - John-Mark Allen - - Bug & warning fixes - Marc LeBlanc David Woo Guillaume George Martins Mozeiko - Christpher Lloyd Jerry Jansson Joseph Thomson Phil Jordan - Dave Moore Roy Eltham Hayaki Saito Nathan Reed - Won Chun Luke Graham Johan Duparc Nick Verigakis - the Horde3D community Thomas Ruf Ronny Chevalier github:rlyeh - Janez Zemva John Bartholomew Michal Cichon github:romigrou - Jonathan Blow Ken Hamada Tero Hanninen github:svdijk - Laurent Gomila Cort Stratton Sergio Gonzalez github:snagar - Aruelien Pocheville Thibault Reuille Cass Everitt github:Zelex - Ryamond Barbiero Paul Du Bois Engin Manap github:grim210 - Aldo Culquicondor Philipp Wiesemann Dale Weiler github:sammyhw - Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:phprus - Julian Raschke Gregory Mullen Baldur Karlsson github:poppolopoppo - Christian Floisand Kevin Schmidt github:darealshinji - Blazej Dariusz Roszkowski github:Michaelangel007 -*/ - -#ifndef STBI_INCLUDE_STB_IMAGE_H -#define STBI_INCLUDE_STB_IMAGE_H - -// DOCUMENTATION -// -// Limitations: -// - no 12-bit-per-channel JPEG -// - no JPEGs with arithmetic coding -// - GIF always returns *comp=4 -// -// Basic usage (see HDR discussion below for HDR usage): -// int x,y,n; -// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); -// // ... process data if not NULL ... -// // ... x = width, y = height, n = # 8-bit components per pixel ... -// // ... replace '0' with '1'..'4' to force that many components per pixel -// // ... but 'n' will always be the number that it would have been if you said 0 -// stbi_image_free(data) -// -// Standard parameters: -// int *x -- outputs image width in pixels -// int *y -- outputs image height in pixels -// int *channels_in_file -- outputs # of image components in image file -// int desired_channels -- if non-zero, # of image components requested in result -// -// The return value from an image loader is an 'unsigned char *' which points -// to the pixel data, or NULL on an allocation failure or if the image is -// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, -// with each pixel consisting of N interleaved 8-bit components; the first -// pixel pointed to is top-left-most in the image. There is no padding between -// image scanlines or between pixels, regardless of format. The number of -// components N is 'desired_channels' if desired_channels is non-zero, or -// *channels_in_file otherwise. If desired_channels is non-zero, -// *channels_in_file has the number of components that _would_ have been -// output otherwise. E.g. if you set desired_channels to 4, you will always -// get RGBA output, but you can check *channels_in_file to see if it's trivially -// opaque because e.g. there were only 3 channels in the source image. -// -// An output image with N components has the following components interleaved -// in this order in each pixel: -// -// N=#comp components -// 1 grey -// 2 grey, alpha -// 3 red, green, blue -// 4 red, green, blue, alpha -// -// If image loading fails for any reason, the return value will be NULL, -// and *x, *y, *channels_in_file will be unchanged. The function -// stbi_failure_reason() can be queried for an extremely brief, end-user -// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS -// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly -// more user-friendly ones. -// -// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. -// -// =========================================================================== -// -// Philosophy -// -// stb libraries are designed with the following priorities: -// -// 1. easy to use -// 2. easy to maintain -// 3. good performance -// -// Sometimes I let "good performance" creep up in priority over "easy to maintain", -// and for best performance I may provide less-easy-to-use APIs that give higher -// performance, in addition to the easy to use ones. Nevertheless, it's important -// to keep in mind that from the standpoint of you, a client of this library, -// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. -// -// Some secondary priorities arise directly from the first two, some of which -// make more explicit reasons why performance can't be emphasized. -// -// - Portable ("ease of use") -// - Small source code footprint ("easy to maintain") -// - No dependencies ("ease of use") -// -// =========================================================================== -// -// I/O callbacks -// -// I/O callbacks allow you to read from arbitrary sources, like packaged -// files or some other source. Data read from callbacks are processed -// through a small internal buffer (currently 128 bytes) to try to reduce -// overhead. -// -// The three functions you must define are "read" (reads some bytes of data), -// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). -// -// =========================================================================== -// -// SIMD support -// -// The JPEG decoder will try to automatically use SIMD kernels on x86 when -// supported by the compiler. For ARM Neon support, you must explicitly -// request it. -// -// (The old do-it-yourself SIMD API is no longer supported in the current -// code.) -// -// On x86, SSE2 will automatically be used when available based on a run-time -// test; if not, the generic C versions are used as a fall-back. On ARM targets, -// the typical path is to have separate builds for NEON and non-NEON devices -// (at least this is true for iOS and Android). Therefore, the NEON support is -// toggled by a build flag: define STBI_NEON to get NEON loops. -// -// If for some reason you do not want to use any of SIMD code, or if -// you have issues compiling it, you can disable it entirely by -// defining STBI_NO_SIMD. -// -// =========================================================================== -// -// HDR image support (disable by defining STBI_NO_HDR) -// -// stb_image now supports loading HDR images in general, and currently -// the Radiance .HDR file format, although the support is provided -// generically. You can still load any file through the existing interface; -// if you attempt to load an HDR file, it will be automatically remapped to -// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; -// both of these constants can be reconfigured through this interface: -// -// stbi_hdr_to_ldr_gamma(2.2f); -// stbi_hdr_to_ldr_scale(1.0f); -// -// (note, do not use _inverse_ constants; stbi_image will invert them -// appropriately). -// -// Additionally, there is a new, parallel interface for loading files as -// (linear) floats to preserve the full dynamic range: -// -// float *data = stbi_loadf(filename, &x, &y, &n, 0); -// -// If you load LDR images through this interface, those images will -// be promoted to floating point values, run through the inverse of -// constants corresponding to the above: -// -// stbi_ldr_to_hdr_scale(1.0f); -// stbi_ldr_to_hdr_gamma(2.2f); -// -// Finally, given a filename (or an open file or memory block--see header -// file for details) containing image data, you can query for the "most -// appropriate" interface to use (that is, whether the image is HDR or -// not), using: -// -// stbi_is_hdr(char *filename); -// -// =========================================================================== -// -// iPhone PNG support: -// -// By default we convert iphone-formatted PNGs back to RGB, even though -// they are internally encoded differently. You can disable this conversion -// by by calling stbi_convert_iphone_png_to_rgb(0), in which case -// you will always just get the native iphone "format" through (which -// is BGR stored in RGB). -// -// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per -// pixel to remove any premultiplied alpha *only* if the image file explicitly -// says there's premultiplied data (currently only happens in iPhone images, -// and only if iPhone convert-to-rgb processing is on). -// -// =========================================================================== -// -// ADDITIONAL CONFIGURATION -// -// - You can suppress implementation of any of the decoders to reduce -// your code footprint by #defining one or more of the following -// symbols before creating the implementation. -// -// STBI_NO_JPEG -// STBI_NO_PNG -// STBI_NO_BMP -// STBI_NO_PSD -// STBI_NO_TGA -// STBI_NO_GIF -// STBI_NO_HDR -// STBI_NO_PIC -// STBI_NO_PNM (.ppm and .pgm) -// -// - You can request *only* certain decoders and suppress all other ones -// (this will be more forward-compatible, as addition of new decoders -// doesn't require you to disable them explicitly): -// -// STBI_ONLY_JPEG -// STBI_ONLY_PNG -// STBI_ONLY_BMP -// STBI_ONLY_PSD -// STBI_ONLY_TGA -// STBI_ONLY_GIF -// STBI_ONLY_HDR -// STBI_ONLY_PIC -// STBI_ONLY_PNM (.ppm and .pgm) -// -// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still -// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB -// - - -#ifndef STBI_NO_STDIO -#include -#endif // STBI_NO_STDIO - -#define STBI_VERSION 1 - -enum -{ - STBI_default = 0, // only used for desired_channels - - STBI_grey = 1, - STBI_grey_alpha = 2, - STBI_rgb = 3, - STBI_rgb_alpha = 4 -}; - -typedef unsigned char stbi_uc; -typedef unsigned short stbi_us; - -#ifdef __cplusplus -extern "C" { -#endif - -#ifdef STB_IMAGE_STATIC -#define STBIDEF static -#else -#define STBIDEF extern -#endif - - ////////////////////////////////////////////////////////////////////////////// - // - // PRIMARY API - works on images of any type - // - - // - // load image by filename, open file, or memory buffer - // - - typedef struct - { - int (*read) (void* user, char* data, int size); // fill 'data' with 'size' bytes. return number of bytes actually read - void (*skip) (void* user, int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative - int (*eof) (void* user); // returns nonzero if we are at end of file/data - } stbi_io_callbacks; - - //////////////////////////////////// - // - // 8-bits-per-channel interface - // - - STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels); -#ifndef STBI_NO_GIF - STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp); -#endif - - -#ifndef STBI_NO_STDIO - STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels); - // for stbi_load_from_file, file pointer is left pointing immediately after image -#endif - -//////////////////////////////////// -// -// 16-bits-per-channel interface -// - - STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO - STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_us* stbi_load_from_file_16(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels); -#endif - - //////////////////////////////////// - // - // float-per-channel interface - // -#ifndef STBI_NO_LINEAR - STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO - STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels); -#endif -#endif - -#ifndef STBI_NO_HDR - STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); - STBIDEF void stbi_hdr_to_ldr_scale(float scale); -#endif // STBI_NO_HDR - -#ifndef STBI_NO_LINEAR - STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); - STBIDEF void stbi_ldr_to_hdr_scale(float scale); -#endif // STBI_NO_LINEAR - - // stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR - STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user); - STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len); -#ifndef STBI_NO_STDIO - STBIDEF int stbi_is_hdr(char const* filename); - STBIDEF int stbi_is_hdr_from_file(FILE* f); -#endif // STBI_NO_STDIO - - - // get a VERY brief reason for failure - // NOT THREADSAFE - STBIDEF const char* stbi_failure_reason(void); - - // free the loaded image -- this is just free() - STBIDEF void stbi_image_free(void* retval_from_stbi_load); - - // get image dimensions & components without fully decoding - STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp); - STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp); - STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len); - STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* clbk, void* user); - -#ifndef STBI_NO_STDIO - STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp); - STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp); - STBIDEF int stbi_is_16_bit(char const* filename); - STBIDEF int stbi_is_16_bit_from_file(FILE* f); -#endif - - - - // for image formats that explicitly notate that they have premultiplied alpha, - // we just return the colors as stored in the file. set this flag to force - // unpremultiplication. results are undefined if the unpremultiply overflow. - STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); - - // indicate whether we should process iphone images back to canonical format, - // or just pass them through "as-is" - STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); - - // flip the image vertically, so the first pixel in the output array is the bottom left - STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); - - // ZLIB client - used by PNG, available for other purposes - - STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen); - STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header); - STBIDEF char* stbi_zlib_decode_malloc(const char* buffer, int len, int* outlen); - STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, const char* ibuffer, int ilen); - - STBIDEF char* stbi_zlib_decode_noheader_malloc(const char* buffer, int len, int* outlen); - STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen); - - -#ifdef __cplusplus -} -#endif - -// -// -//// end header file ///////////////////////////////////////////////////// -#endif // STBI_INCLUDE_STB_IMAGE_H - -#ifdef STB_IMAGE_IMPLEMENTATION - -#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ - || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ - || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ - || defined(STBI_ONLY_ZLIB) -#ifndef STBI_ONLY_JPEG -#define STBI_NO_JPEG -#endif -#ifndef STBI_ONLY_PNG -#define STBI_NO_PNG -#endif -#ifndef STBI_ONLY_BMP -#define STBI_NO_BMP -#endif -#ifndef STBI_ONLY_PSD -#define STBI_NO_PSD -#endif -#ifndef STBI_ONLY_TGA -#define STBI_NO_TGA -#endif -#ifndef STBI_ONLY_GIF -#define STBI_NO_GIF -#endif -#ifndef STBI_ONLY_HDR -#define STBI_NO_HDR -#endif -#ifndef STBI_ONLY_PIC -#define STBI_NO_PIC -#endif -#ifndef STBI_ONLY_PNM -#define STBI_NO_PNM -#endif -#endif - -#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) -#define STBI_NO_ZLIB -#endif - - -#include -#include // ptrdiff_t on osx -#include -#include -#include - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -#include // ldexp, pow -#endif - -#ifndef STBI_NO_STDIO -#include -#endif - -#ifndef STBI_ASSERT -#include -#define STBI_ASSERT(x) assert(x) -#endif - - -#ifndef _MSC_VER -#ifdef __cplusplus -#define stbi_inline inline -#else -#define stbi_inline -#endif -#else -#define stbi_inline __forceinline -#endif - - -#ifdef _MSC_VER -typedef unsigned short stbi__uint16; -typedef signed short stbi__int16; -typedef unsigned int stbi__uint32; -typedef signed int stbi__int32; -#else -#include -typedef uint16_t stbi__uint16; -typedef int16_t stbi__int16; -typedef uint32_t stbi__uint32; -typedef int32_t stbi__int32; -#endif - -// should produce compiler error if size is wrong -typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1]; - -#ifdef _MSC_VER -#define STBI_NOTUSED(v) (void)(v) -#else -#define STBI_NOTUSED(v) (void)sizeof(v) -#endif - -#ifdef _MSC_VER -#define STBI_HAS_LROTL -#endif - -#ifdef STBI_HAS_LROTL -#define stbi_lrot(x,y) _lrotl(x,y) -#else -#define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) -#endif - -#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) -// ok -#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) -// ok -#else -#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." -#endif - -#ifndef STBI_MALLOC -#define STBI_MALLOC(sz) malloc(sz) -#define STBI_REALLOC(p,newsz) realloc(p,newsz) -#define STBI_FREE(p) free(p) -#endif - -#ifndef STBI_REALLOC_SIZED -#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) -#endif - -// x86/x64 detection -#if defined(__x86_64__) || defined(_M_X64) -#define STBI__X64_TARGET -#elif defined(__i386) || defined(_M_IX86) -#define STBI__X86_TARGET -#endif - -#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) -// gcc doesn't support sse2 intrinsics unless you compile with -msse2, -// which in turn means it gets to use SSE2 everywhere. This is unfortunate, -// but previous attempts to provide the SSE2 functions with runtime -// detection caused numerous issues. The way architecture extensions are -// exposed in GCC/Clang is, sadly, not really suited for one-file libs. -// New behavior: if compiled with -msse2, we use SSE2 without any -// detection; if not, we don't use it at all. -#define STBI_NO_SIMD -#endif - -#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) -// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET -// -// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the -// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. -// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not -// simultaneously enabling "-mstackrealign". -// -// See https://github.com/nothings/stb/issues/81 for more information. -// -// So default to no SSE2 on 32-bit MinGW. If you've read this far and added -// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. -#define STBI_NO_SIMD -#endif - -#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) -#define STBI_SSE2 -#include - -#ifdef _MSC_VER - -#if _MSC_VER >= 1400 // not VC6 -#include // __cpuid -static int stbi__cpuid3(void) -{ - int info[4]; - __cpuid(info, 1); - return info[3]; -} -#else -static int stbi__cpuid3(void) -{ - int res; - __asm { - mov eax, 1 - cpuid - mov res, edx - } - return res; -} -#endif - -#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name - -static int stbi__sse2_available(void) -{ - int info3 = stbi__cpuid3(); - return ((info3 >> 26) & 1) != 0; -} -#else // assume GCC-style if not VC++ -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) - -static int stbi__sse2_available(void) -{ - // If we're even attempting to compile this on GCC/Clang, that means - // -msse2 is on, which means the compiler is allowed to use SSE2 - // instructions at will, and so are we. - return 1; -} -#endif -#endif - -// ARM NEON -#if defined(STBI_NO_SIMD) && defined(STBI_NEON) -#undef STBI_NEON -#endif - -#ifdef STBI_NEON -#include -// assume GCC or Clang on ARM targets -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) -#endif - -#ifndef STBI_SIMD_ALIGN -#define STBI_SIMD_ALIGN(type, name) type name -#endif - -/////////////////////////////////////////////// -// -// stbi__context struct and start_xxx functions - -// stbi__context structure is our basic context used by all images, so it -// contains all the IO context, plus some basic image information -typedef struct -{ - stbi__uint32 img_x, img_y; - int img_n, img_out_n; - - stbi_io_callbacks io; - void* io_user_data; - - int read_from_callbacks; - int buflen; - stbi_uc buffer_start[128]; - - stbi_uc* img_buffer, * img_buffer_end; - stbi_uc* img_buffer_original, * img_buffer_original_end; -} stbi__context; - - -static void stbi__refill_buffer(stbi__context* s); - -// initialize a memory-decode context -static void stbi__start_mem(stbi__context* s, stbi_uc const* buffer, int len) -{ - s->io.read = NULL; - s->read_from_callbacks = 0; - s->img_buffer = s->img_buffer_original = (stbi_uc*)buffer; - s->img_buffer_end = s->img_buffer_original_end = (stbi_uc*)buffer + len; -} - -// initialize a callback-based context -static void stbi__start_callbacks(stbi__context* s, stbi_io_callbacks* c, void* user) -{ - s->io = *c; - s->io_user_data = user; - s->buflen = sizeof(s->buffer_start); - s->read_from_callbacks = 1; - s->img_buffer_original = s->buffer_start; - stbi__refill_buffer(s); - s->img_buffer_original_end = s->img_buffer_end; -} - -#ifndef STBI_NO_STDIO - -static int stbi__stdio_read(void* user, char* data, int size) -{ - return (int)fread(data, 1, size, (FILE*)user); -} - -static void stbi__stdio_skip(void* user, int n) -{ - fseek((FILE*)user, n, SEEK_CUR); -} - -static int stbi__stdio_eof(void* user) -{ - return feof((FILE*)user); -} - -static stbi_io_callbacks stbi__stdio_callbacks = -{ - stbi__stdio_read, - stbi__stdio_skip, - stbi__stdio_eof, -}; - -static void stbi__start_file(stbi__context* s, FILE* f) -{ - stbi__start_callbacks(s, &stbi__stdio_callbacks, (void*)f); -} - -//static void stop_file(stbi__context *s) { } - -#endif // !STBI_NO_STDIO - -static void stbi__rewind(stbi__context* s) -{ - // conceptually rewind SHOULD rewind to the beginning of the stream, - // but we just rewind to the beginning of the initial buffer, because - // we only use it after doing 'test', which only ever looks at at most 92 bytes - s->img_buffer = s->img_buffer_original; - s->img_buffer_end = s->img_buffer_original_end; -} - -enum -{ - STBI_ORDER_RGB, - STBI_ORDER_BGR -}; - -typedef struct -{ - int bits_per_channel; - int num_channels; - int channel_order; -} stbi__result_info; - -#ifndef STBI_NO_JPEG -static int stbi__jpeg_test(stbi__context* s); -static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PNG -static int stbi__png_test(stbi__context* s); -static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp); -static int stbi__png_is16(stbi__context* s); -#endif - -#ifndef STBI_NO_BMP -static int stbi__bmp_test(stbi__context* s); -static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_TGA -static int stbi__tga_test(stbi__context* s); -static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context* s); -static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc); -static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp); -static int stbi__psd_is16(stbi__context* s); -#endif - -#ifndef STBI_NO_HDR -static int stbi__hdr_test(stbi__context* s); -static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_test(stbi__context* s); -static void* stbi__pic_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_GIF -static int stbi__gif_test(stbi__context* s); -static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp); -static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PNM -static int stbi__pnm_test(stbi__context* s); -static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -// this is not threadsafe -static const char* stbi__g_failure_reason; - -STBIDEF const char* stbi_failure_reason(void) -{ - return stbi__g_failure_reason; -} - -static int stbi__err(const char* str) -{ - stbi__g_failure_reason = str; - return 0; -} - -static void* stbi__malloc(size_t size) -{ - return STBI_MALLOC(size); -} - -// stb_image uses ints pervasively, including for offset calculations. -// therefore the largest decoded image size we can support with the -// current code, even on 64-bit targets, is INT_MAX. this is not a -// significant limitation for the intended use case. -// -// we do, however, need to make sure our size calculations don't -// overflow. hence a few helper functions for size calculations that -// multiply integers together, making sure that they're non-negative -// and no overflow occurs. - -// return 1 if the sum is valid, 0 on overflow. -// negative terms are considered invalid. -static int stbi__addsizes_valid(int a, int b) -{ - if (b < 0) return 0; - // now 0 <= b <= INT_MAX, hence also - // 0 <= INT_MAX - b <= INTMAX. - // And "a + b <= INT_MAX" (which might overflow) is the - // same as a <= INT_MAX - b (no overflow) - return a <= INT_MAX - b; -} - -// returns 1 if the product is valid, 0 on overflow. -// negative factors are considered invalid. -static int stbi__mul2sizes_valid(int a, int b) -{ - if (a < 0 || b < 0) return 0; - if (b == 0) return 1; // mul-by-0 is always safe - // portable way to check for no overflows in a*b - return a <= INT_MAX / b; -} - -// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow -static int stbi__mad2sizes_valid(int a, int b, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add); -} - -// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow -static int stbi__mad3sizes_valid(int a, int b, int c, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && - stbi__addsizes_valid(a * b * c, add); -} - -// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && - stbi__mul2sizes_valid(a * b * c, d) && stbi__addsizes_valid(a * b * c * d, add); -} -#endif - -// mallocs with size overflow checking -static void* stbi__malloc_mad2(int a, int b, int add) -{ - if (!stbi__mad2sizes_valid(a, b, add)) return NULL; - return stbi__malloc(a * b + add); -} - -static void* stbi__malloc_mad3(int a, int b, int c, int add) -{ - if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; - return stbi__malloc(a * b * c + add); -} - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -static void* stbi__malloc_mad4(int a, int b, int c, int d, int add) -{ - if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; - return stbi__malloc(a * b * c * d + add); -} -#endif - -// stbi__err - error -// stbi__errpf - error returning pointer to float -// stbi__errpuc - error returning pointer to unsigned char - -#ifdef STBI_NO_FAILURE_STRINGS -#define stbi__err(x,y) 0 -#elif defined(STBI_FAILURE_USERMSG) -#define stbi__err(x,y) stbi__err(y) -#else -#define stbi__err(x,y) stbi__err(x) -#endif - -#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) -#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) - -STBIDEF void stbi_image_free(void* retval_from_stbi_load) -{ - STBI_FREE(retval_from_stbi_load); -} - -#ifndef STBI_NO_LINEAR -static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp); -#endif - -#ifndef STBI_NO_HDR -static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp); -#endif - -static int stbi__vertically_flip_on_load = 0; - -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load = flag_true_if_should_flip; -} - -static void* stbi__load_main(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) -{ - memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields - ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed - ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order - ri->num_channels = 0; - -#ifndef STBI_NO_JPEG - if (stbi__jpeg_test(s)) return stbi__jpeg_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_PNG - if (stbi__png_test(s)) return stbi__png_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_BMP - if (stbi__bmp_test(s)) return stbi__bmp_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_GIF - if (stbi__gif_test(s)) return stbi__gif_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_PSD - if (stbi__psd_test(s)) return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc); -#endif -#ifndef STBI_NO_PIC - if (stbi__pic_test(s)) return stbi__pic_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_PNM - if (stbi__pnm_test(s)) return stbi__pnm_load(s, x, y, comp, req_comp, ri); -#endif - -#ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - float* hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri); - return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); - } -#endif - -#ifndef STBI_NO_TGA - // test tga last because it's a crappy test! - if (stbi__tga_test(s)) - return stbi__tga_load(s, x, y, comp, req_comp, ri); -#endif - - return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); -} - -static stbi_uc* stbi__convert_16_to_8(stbi__uint16* orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi_uc* reduced; - - reduced = (stbi_uc*)stbi__malloc(img_len); - if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling - - STBI_FREE(orig); - return reduced; -} - -static stbi__uint16* stbi__convert_8_to_16(stbi_uc* orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi__uint16* enlarged; - - enlarged = (stbi__uint16*)stbi__malloc(img_len * 2); - if (enlarged == NULL) return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff - - STBI_FREE(orig); - return enlarged; -} - -static void stbi__vertical_flip(void* image, int w, int h, int bytes_per_pixel) -{ - int row; - size_t bytes_per_row = (size_t)w * bytes_per_pixel; - stbi_uc temp[2048]; - stbi_uc* bytes = (stbi_uc*)image; - - for (row = 0; row < (h >> 1); row++) { - stbi_uc* row0 = bytes + row * bytes_per_row; - stbi_uc* row1 = bytes + (h - row - 1) * bytes_per_row; - // swap row0 with row1 - size_t bytes_left = bytes_per_row; - while (bytes_left) { - size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); - memcpy(temp, row0, bytes_copy); - memcpy(row0, row1, bytes_copy); - memcpy(row1, temp, bytes_copy); - row0 += bytes_copy; - row1 += bytes_copy; - bytes_left -= bytes_copy; - } - } -} - -static void stbi__vertical_flip_slices(void* image, int w, int h, int z, int bytes_per_pixel) -{ - int slice; - int slice_size = w * h * bytes_per_pixel; - - stbi_uc* bytes = (stbi_uc*)image; - for (slice = 0; slice < z; ++slice) { - stbi__vertical_flip(bytes, w, h, bytes_per_pixel); - bytes += slice_size; - } -} - -static unsigned char* stbi__load_and_postprocess_8bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) -{ - stbi__result_info ri; - void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); - - if (result == NULL) - return NULL; - - if (ri.bits_per_channel != 8) { - STBI_ASSERT(ri.bits_per_channel == 16); - result = stbi__convert_16_to_8((stbi__uint16*)result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 8; - } - - // @TODO: move stbi__convert_format to here - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); - } - - return (unsigned char*)result; -} - -static stbi__uint16* stbi__load_and_postprocess_16bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) -{ - stbi__result_info ri; - void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); - - if (result == NULL) - return NULL; - - if (ri.bits_per_channel != 16) { - STBI_ASSERT(ri.bits_per_channel == 8); - result = stbi__convert_8_to_16((stbi_uc*)result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 16; - } - - // @TODO: move stbi__convert_format16 to here - // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); - } - - return (stbi__uint16*)result; -} - -#if !defined(STBI_NO_HDR) || !defined(STBI_NO_LINEAR) -static void stbi__float_postprocess(float* result, int* x, int* y, int* comp, int req_comp) -{ - if (stbi__vertically_flip_on_load && result != NULL) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); - } -} -#endif - -#ifndef STBI_NO_STDIO - -static FILE* stbi__fopen(char const* filename, char const* mode) -{ - FILE* f; -#if defined(_MSC_VER) && _MSC_VER >= 1400 - if (0 != fopen_s(&f, filename, mode)) - f = 0; -#else - f = fopen(filename, mode); -#endif - return f; -} - - -STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* comp, int req_comp) -{ - FILE* f = stbi__fopen(filename, "rb"); - unsigned char* result; - if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file(f, x, y, comp, req_comp); - fclose(f); - return result; -} - -STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) -{ - unsigned char* result; - stbi__context s; - stbi__start_file(&s, f); - result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi__uint16* stbi_load_from_file_16(FILE* f, int* x, int* y, int* comp, int req_comp) -{ - stbi__uint16* result; - stbi__context s; - stbi__start_file(&s, f); - result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* comp, int req_comp) -{ - FILE* f = stbi__fopen(filename, "rb"); - stbi__uint16* result; - if (!f) return (stbi_us*)stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file_16(f, x, y, comp, req_comp); - fclose(f); - return result; -} - - -#endif //!STBI_NO_STDIO - -STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); -} - -STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); -} - -STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); -} - -STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); -} - -#ifndef STBI_NO_GIF -STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp) -{ - unsigned char* result; - stbi__context s; - stbi__start_mem(&s, buffer, len); - - result = (unsigned char*)stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); - if (stbi__vertically_flip_on_load) { - stbi__vertical_flip_slices(result, *x, *y, *z, *comp); - } - - return result; -} -#endif - -#ifndef STBI_NO_LINEAR -static float* stbi__loadf_main(stbi__context* s, int* x, int* y, int* comp, int req_comp) -{ - unsigned char* data; -#ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - stbi__result_info ri; - float* hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri); - if (hdr_data) - stbi__float_postprocess(hdr_data, x, y, comp, req_comp); - return hdr_data; - } -#endif - data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); - if (data) - return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); - return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); -} - -STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__loadf_main(&s, x, y, comp, req_comp); -} - -STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__loadf_main(&s, x, y, comp, req_comp); -} - -#ifndef STBI_NO_STDIO -STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* comp, int req_comp) -{ - float* result; - FILE* f = stbi__fopen(filename, "rb"); - if (!f) return stbi__errpf("can't fopen", "Unable to open file"); - result = stbi_loadf_from_file(f, x, y, comp, req_comp); - fclose(f); - return result; -} - -STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_file(&s, f); - return stbi__loadf_main(&s, x, y, comp, req_comp); -} -#endif // !STBI_NO_STDIO - -#endif // !STBI_NO_LINEAR - -// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is -// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always -// reports false! - -STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len) -{ -#ifndef STBI_NO_HDR - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__hdr_test(&s); -#else - STBI_NOTUSED(buffer); - STBI_NOTUSED(len); - return 0; -#endif -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_is_hdr(char const* filename) -{ - FILE* f = stbi__fopen(filename, "rb"); - int result = 0; - if (f) { - result = stbi_is_hdr_from_file(f); - fclose(f); - } - return result; -} - -STBIDEF int stbi_is_hdr_from_file(FILE* f) -{ -#ifndef STBI_NO_HDR - long pos = ftell(f); - int res; - stbi__context s; - stbi__start_file(&s, f); - res = stbi__hdr_test(&s); - fseek(f, pos, SEEK_SET); - return res; -#else - STBI_NOTUSED(f); - return 0; -#endif -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user) -{ -#ifndef STBI_NO_HDR - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__hdr_test(&s); -#else - STBI_NOTUSED(clbk); - STBI_NOTUSED(user); - return 0; -#endif -} - -#ifndef STBI_NO_LINEAR -static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f; - -STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } -STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } -#endif - -static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f; - -STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1 / gamma; } -STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1 / scale; } - - -////////////////////////////////////////////////////////////////////////////// -// -// Common code used by all image loaders -// - -enum -{ - STBI__SCAN_load = 0, - STBI__SCAN_type, - STBI__SCAN_header -}; - -static void stbi__refill_buffer(stbi__context* s) -{ - int n = (s->io.read)(s->io_user_data, (char*)s->buffer_start, s->buflen); - if (n == 0) { - // at end of file, treat same as if from memory, but need to handle case - // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file - s->read_from_callbacks = 0; - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start + 1; - *s->img_buffer = 0; - } - else { - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start + n; - } -} - -stbi_inline static stbi_uc stbi__get8(stbi__context* s) -{ - if (s->img_buffer < s->img_buffer_end) - return *s->img_buffer++; - if (s->read_from_callbacks) { - stbi__refill_buffer(s); - return *s->img_buffer++; - } - return 0; -} - -stbi_inline static int stbi__at_eof(stbi__context* s) -{ - if (s->io.read) { - if (!(s->io.eof)(s->io_user_data)) return 0; - // if feof() is true, check if buffer = end - // special case: we've only got the special 0 character at the end - if (s->read_from_callbacks == 0) return 1; - } - - return s->img_buffer >= s->img_buffer_end; -} - -static void stbi__skip(stbi__context* s, int n) -{ - if (n < 0) { - s->img_buffer = s->img_buffer_end; - return; - } - if (s->io.read) { - int blen = (int)(s->img_buffer_end - s->img_buffer); - if (blen < n) { - s->img_buffer = s->img_buffer_end; - (s->io.skip)(s->io_user_data, n - blen); - return; - } - } - s->img_buffer += n; -} - -static int stbi__getn(stbi__context* s, stbi_uc* buffer, int n) -{ - if (s->io.read) { - int blen = (int)(s->img_buffer_end - s->img_buffer); - if (blen < n) { - int res, count; - - memcpy(buffer, s->img_buffer, blen); - - count = (s->io.read)(s->io_user_data, (char*)buffer + blen, n - blen); - res = (count == (n - blen)); - s->img_buffer = s->img_buffer_end; - return res; - } - } - - if (s->img_buffer + n <= s->img_buffer_end) { - memcpy(buffer, s->img_buffer, n); - s->img_buffer += n; - return 1; - } - else - return 0; -} - -static int stbi__get16be(stbi__context* s) -{ - int z = stbi__get8(s); - return (z << 8) + stbi__get8(s); -} - -static stbi__uint32 stbi__get32be(stbi__context* s) -{ - stbi__uint32 z = stbi__get16be(s); - return (z << 16) + stbi__get16be(s); -} - -#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) -// nothing -#else -static int stbi__get16le(stbi__context* s) -{ - int z = stbi__get8(s); - return z + (stbi__get8(s) << 8); -} -#endif - -#ifndef STBI_NO_BMP -static stbi__uint32 stbi__get32le(stbi__context* s) -{ - stbi__uint32 z = stbi__get16le(s); - return z + (stbi__get16le(s) << 16); -} -#endif - -#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings - - -////////////////////////////////////////////////////////////////////////////// -// -// generic converter from built-in img_n to req_comp -// individual types do this automatically as much as possible (e.g. jpeg -// does all cases internally since it needs to colorspace convert anyway, -// and it never has alpha, so very few cases ). png can automatically -// interleave an alpha=255 channel, but falls back to this for other cases -// -// assume data buffer is malloced, so malloc a new one and free that one -// only failure mode is malloc failing - -static stbi_uc stbi__compute_y(int r, int g, int b) -{ - return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8); -} - -static unsigned char* stbi__convert_format(unsigned char* data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i, j; - unsigned char* good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (unsigned char*)stbi__malloc_mad3(req_comp, x, y, 0); - if (good == NULL) { - STBI_FREE(data); - return stbi__errpuc("outofmem", "Out of memory"); - } - - for (j = 0; j < (int)y; ++j) { - unsigned char* src = data + j * x * img_n; - unsigned char* dest = good + j * x * req_comp; - -#define STBI__COMBO(a,b) ((a)*8+(b)) -#define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1, 2) { dest[0] = src[0], dest[1] = 255; } break; - STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(1, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = 255; } break; - STBI__CASE(2, 1) { dest[0] = src[0]; } break; - STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(2, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = src[1]; } break; - STBI__CASE(3, 4) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2], dest[3] = 255; } break; - STBI__CASE(3, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } break; - STBI__CASE(3, 2) { dest[0] = stbi__compute_y(src[0], src[1], src[2]), dest[1] = 255; } break; - STBI__CASE(4, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } break; - STBI__CASE(4, 2) { dest[0] = stbi__compute_y(src[0], src[1], src[2]), dest[1] = src[3]; } break; - STBI__CASE(4, 3) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2]; } break; - default: STBI_ASSERT(0); - } -#undef STBI__CASE - } - - STBI_FREE(data); - return good; -} - -static stbi__uint16 stbi__compute_y_16(int r, int g, int b) -{ - return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); -} - -static stbi__uint16* stbi__convert_format16(stbi__uint16* data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i, j; - stbi__uint16* good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (stbi__uint16*)stbi__malloc(req_comp * x * y * 2); - if (good == NULL) { - STBI_FREE(data); - return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory"); - } - - for (j = 0; j < (int)y; ++j) { - stbi__uint16* src = data + j * x * img_n; - stbi__uint16* dest = good + j * x * req_comp; - -#define STBI__COMBO(a,b) ((a)*8+(b)) -#define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1, 2) { dest[0] = src[0], dest[1] = 0xffff; } break; - STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(1, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = 0xffff; } break; - STBI__CASE(2, 1) { dest[0] = src[0]; } break; - STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(2, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = src[1]; } break; - STBI__CASE(3, 4) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2], dest[3] = 0xffff; } break; - STBI__CASE(3, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } break; - STBI__CASE(3, 2) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]), dest[1] = 0xffff; } break; - STBI__CASE(4, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } break; - STBI__CASE(4, 2) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]), dest[1] = src[3]; } break; - STBI__CASE(4, 3) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2]; } break; - default: STBI_ASSERT(0); - } -#undef STBI__CASE - } - - STBI_FREE(data); - return good; -} - -#ifndef STBI_NO_LINEAR -static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp) -{ - int i, k, n; - float* output; - if (!data) return NULL; - output = (float*)stbi__malloc_mad4(x, y, comp, sizeof(float), 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp - 1; - for (i = 0; i < x * y; ++i) { - for (k = 0; k < n; ++k) { - output[i * comp + k] = (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) * stbi__l2h_scale); - } - if (k < comp) output[i * comp + k] = data[i * comp + k] / 255.0f; - } - STBI_FREE(data); - return output; -} -#endif - -#ifndef STBI_NO_HDR -#define stbi__float2int(x) ((int) (x)) -static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp) -{ - int i, k, n; - stbi_uc* output; - if (!data) return NULL; - output = (stbi_uc*)stbi__malloc_mad3(x, y, comp, 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp - 1; - for (i = 0; i < x * y; ++i) { - for (k = 0; k < n; ++k) { - float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i * comp + k] = (stbi_uc)stbi__float2int(z); - } - if (k < comp) { - float z = data[i * comp + k] * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i * comp + k] = (stbi_uc)stbi__float2int(z); - } - } - STBI_FREE(data); - return output; -} -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// "baseline" JPEG/JFIF decoder -// -// simple implementation -// - doesn't support delayed output of y-dimension -// - simple interface (only one output format: 8-bit interleaved RGB) -// - doesn't try to recover corrupt jpegs -// - doesn't allow partial loading, loading multiple at once -// - still fast on x86 (copying globals into locals doesn't help x86) -// - allocates lots of intermediate memory (full size of all components) -// - non-interleaved case requires this anyway -// - allows good upsampling (see next) -// high-quality -// - upsampled channels are bilinearly interpolated, even across blocks -// - quality integer IDCT derived from IJG's 'slow' -// performance -// - fast huffman; reasonable integer IDCT -// - some SIMD kernels for common paths on targets with SSE2/NEON -// - uses a lot of intermediate memory, could cache poorly - -#ifndef STBI_NO_JPEG - -// huffman decoding acceleration -#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache - -typedef struct -{ - stbi_uc fast[1 << FAST_BITS]; - // weirdly, repacking this into AoS is a 10% speed loss, instead of a win - stbi__uint16 code[256]; - stbi_uc values[256]; - stbi_uc size[257]; - unsigned int maxcode[18]; - int delta[17]; // old 'firstsymbol' - old 'firstcode' -} stbi__huffman; - -typedef struct -{ - stbi__context* s; - stbi__huffman huff_dc[4]; - stbi__huffman huff_ac[4]; - stbi__uint16 dequant[4][64]; - stbi__int16 fast_ac[4][1 << FAST_BITS]; - - // sizes for components, interleaved MCUs - int img_h_max, img_v_max; - int img_mcu_x, img_mcu_y; - int img_mcu_w, img_mcu_h; - - // definition of jpeg image component - struct - { - int id; - int h, v; - int tq; - int hd, ha; - int dc_pred; - - int x, y, w2, h2; - stbi_uc* data; - void* raw_data, * raw_coeff; - stbi_uc* linebuf; - short* coeff; // progressive only - int coeff_w, coeff_h; // number of 8x8 coefficient blocks - } img_comp[4]; - - stbi__uint32 code_buffer; // jpeg entropy-coded buffer - int code_bits; // number of valid bits - unsigned char marker; // marker seen while filling entropy buffer - int nomore; // flag if we saw a marker so must stop - - int progressive; - int spec_start; - int spec_end; - int succ_high; - int succ_low; - int eob_run; - int jfif; - int app14_color_transform; // Adobe APP14 tag - int rgb; - - int scan_n, order[4]; - int restart_interval, todo; - - // kernels - void (*idct_block_kernel)(stbi_uc* out, int out_stride, short data[64]); - void (*YCbCr_to_RGB_kernel)(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step); - stbi_uc* (*resample_row_hv_2_kernel)(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs); -} stbi__jpeg; - -static int stbi__build_huffman(stbi__huffman* h, int* count) -{ - int i, j, k = 0; - unsigned int code; - // build size list for each symbol (from JPEG spec) - for (i = 0; i < 16; ++i) - for (j = 0; j < count[i]; ++j) - h->size[k++] = (stbi_uc)(i + 1); - h->size[k] = 0; - - // compute actual symbols (from jpeg spec) - code = 0; - k = 0; - for (j = 1; j <= 16; ++j) { - // compute delta to add to code to compute symbol id - h->delta[j] = k - code; - if (h->size[k] == j) { - while (h->size[k] == j) - h->code[k++] = (stbi__uint16)(code++); - if (code - 1 >= (1u << j)) return stbi__err("bad code lengths", "Corrupt JPEG"); - } - // compute largest code + 1 for this size, preshifted as needed later - h->maxcode[j] = code << (16 - j); - code <<= 1; - } - h->maxcode[j] = 0xffffffff; - - // build non-spec acceleration table; 255 is flag for not-accelerated - memset(h->fast, 255, 1 << FAST_BITS); - for (i = 0; i < k; ++i) { - int s = h->size[i]; - if (s <= FAST_BITS) { - int c = h->code[i] << (FAST_BITS - s); - int m = 1 << (FAST_BITS - s); - for (j = 0; j < m; ++j) { - h->fast[c + j] = (stbi_uc)i; - } - } - } - return 1; -} - -// build a table that decodes both magnitude and value of small ACs in -// one go. -static void stbi__build_fast_ac(stbi__int16* fast_ac, stbi__huffman* h) -{ - int i; - for (i = 0; i < (1 << FAST_BITS); ++i) { - stbi_uc fast = h->fast[i]; - fast_ac[i] = 0; - if (fast < 255) { - int rs = h->values[fast]; - int run = (rs >> 4) & 15; - int magbits = rs & 15; - int len = h->size[fast]; - - if (magbits && len + magbits <= FAST_BITS) { - // magnitude code followed by receive_extend code - int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); - int m = 1 << (magbits - 1); - if (k < m) k += (~0U << magbits) + 1; - // if the result is small enough, we can fit it in fast_ac table - if (k >= -128 && k <= 127) - fast_ac[i] = (stbi__int16)((k * 256) + (run * 16) + (len + magbits)); - } - } - } -} - -static void stbi__grow_buffer_unsafe(stbi__jpeg* j) -{ - do { - unsigned int b = j->nomore ? 0 : stbi__get8(j->s); - if (b == 0xff) { - int c = stbi__get8(j->s); - while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes - if (c != 0) { - j->marker = (unsigned char)c; - j->nomore = 1; - return; - } - } - j->code_buffer |= b << (24 - j->code_bits); - j->code_bits += 8; - } while (j->code_bits <= 24); -} - -// (1 << n) - 1 -static const stbi__uint32 stbi__bmask[17] = { 0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535 }; - -// decode a jpeg huffman value from the bitstream -stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg* j, stbi__huffman* h) -{ - unsigned int temp; - int c, k; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - // look at the top FAST_BITS and determine what symbol ID it is, - // if the code is <= FAST_BITS - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); - k = h->fast[c]; - if (k < 255) { - int s = h->size[k]; - if (s > j->code_bits) - return -1; - j->code_buffer <<= s; - j->code_bits -= s; - return h->values[k]; - } - - // naive test is to shift the code_buffer down so k bits are - // valid, then test against maxcode. To speed this up, we've - // preshifted maxcode left so that it has (16-k) 0s at the - // end; in other words, regardless of the number of bits, it - // wants to be compared against something shifted to have 16; - // that way we don't need to shift inside the loop. - temp = j->code_buffer >> 16; - for (k = FAST_BITS + 1; ; ++k) - if (temp < h->maxcode[k]) - break; - if (k == 17) { - // error! code not found - j->code_bits -= 16; - return -1; - } - - if (k > j->code_bits) - return -1; - - // convert the huffman code to the symbol id - c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; - STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); - - // convert the id to a symbol - j->code_bits -= k; - j->code_buffer <<= k; - return h->values[c]; -} - -// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); - - sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB - k = stbi_lrot(j->code_buffer, n); - STBI_ASSERT(n >= 0 && n < (int)(sizeof(stbi__bmask) / sizeof(*stbi__bmask))); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k + (stbi__jbias[n] & ~sgn); -} - -// get some unsigned bits -stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg* j, int n) -{ - unsigned int k; - if (j->code_bits < n) stbi__grow_buffer_unsafe(j); - k = stbi_lrot(j->code_buffer, n); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k; -} - -stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg* j) -{ - unsigned int k; - if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); - k = j->code_buffer; - j->code_buffer <<= 1; - --j->code_bits; - return k & 0x80000000; -} - -// given a value that's at position X in the zigzag stream, -// where does it appear in the 8x8 matrix coded as row-major? -static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = -{ - 0, 1, 8, 16, 9, 2, 3, 10, - 17, 24, 32, 25, 18, 11, 4, 5, - 12, 19, 26, 33, 40, 48, 41, 34, - 27, 20, 13, 6, 7, 14, 21, 28, - 35, 42, 49, 56, 57, 50, 43, 36, - 29, 22, 15, 23, 30, 37, 44, 51, - 58, 59, 52, 45, 38, 31, 39, 46, - 53, 60, 61, 54, 47, 55, 62, 63, - // let corrupt input sample past end - 63, 63, 63, 63, 63, 63, 63, 63, - 63, 63, 63, 63, 63, 63, 63 -}; - -// decode one 64-entry block-- -static int stbi__jpeg_decode_block(stbi__jpeg* j, short data[64], stbi__huffman* hdc, stbi__huffman* hac, stbi__int16* fac, int b, stbi__uint16* dequant) -{ - int diff, dc, k; - int t; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - t = stbi__jpeg_huff_decode(j, hdc); - if (t < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - - // 0 all the ac values now so we can do it 32-bits at a time - memset(data, 0, 64 * sizeof(data[0])); - - diff = t ? stbi__extend_receive(j, t) : 0; - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short)(dc * dequant[0]); - - // decode AC components, see JPEG spec - k = 1; - do { - unsigned int zig; - int c, r, s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)((r >> 8) * dequant[zig]); - } - else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (rs != 0xf0) break; // end block - k += 16; - } - else { - k += r; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]); - } - } - } while (k < 64); - return 1; -} - -static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg* j, short data[64], stbi__huffman* hdc, int b) -{ - int diff, dc; - int t; - if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - if (j->succ_high == 0) { - // first scan for DC coefficient, must be first - memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now - t = stbi__jpeg_huff_decode(j, hdc); - diff = t ? stbi__extend_receive(j, t) : 0; - - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short)(dc << j->succ_low); - } - else { - // refinement scan for DC coefficient - if (stbi__jpeg_get_bit(j)) - data[0] += (short)(1 << j->succ_low); - } - return 1; -} - -// @OPTIMIZE: store non-zigzagged during the decode passes, -// and only de-zigzag when dequantizing -static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg* j, short data[64], stbi__huffman* hac, stbi__int16* fac) -{ - int k; - if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->succ_high == 0) { - int shift = j->succ_low; - - if (j->eob_run) { - --j->eob_run; - return 1; - } - - k = j->spec_start; - do { - unsigned int zig; - int c, r, s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)((r >> 8) << shift); - } - else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r); - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - --j->eob_run; - break; - } - k += 16; - } - else { - k += r; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)(stbi__extend_receive(j, s) << shift); - } - } - } while (k <= j->spec_end); - } - else { - // refinement scan for these AC coefficients - - short bit = (short)(1 << j->succ_low); - - if (j->eob_run) { - --j->eob_run; - for (k = j->spec_start; k <= j->spec_end; ++k) { - short* p = &data[stbi__jpeg_dezigzag[k]]; - if (*p != 0) - if (stbi__jpeg_get_bit(j)) - if ((*p & bit) == 0) { - if (*p > 0) - * p += bit; - else - *p -= bit; - } - } - } - else { - k = j->spec_start; - do { - int r, s; - int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh - if (rs < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r) - 1; - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - r = 64; // force end of block - } - else { - // r=15 s=0 should write 16 0s, so we just do - // a run of 15 0s and then write s (which is 0), - // so we don't have to do anything special here - } - } - else { - if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); - // sign bit - if (stbi__jpeg_get_bit(j)) - s = bit; - else - s = -bit; - } - - // advance by r - while (k <= j->spec_end) { - short* p = &data[stbi__jpeg_dezigzag[k++]]; - if (*p != 0) { - if (stbi__jpeg_get_bit(j)) - if ((*p & bit) == 0) { - if (*p > 0) - * p += bit; - else - *p -= bit; - } - } - else { - if (r == 0) { - *p = (short)s; - break; - } - --r; - } - } - } while (k <= j->spec_end); - } - } - return 1; -} - -// take a -128..127 value and stbi__clamp it and convert to 0..255 -stbi_inline static stbi_uc stbi__clamp(int x) -{ - // trick to use a single test to catch both cases - if ((unsigned int)x > 255) { - if (x < 0) return 0; - if (x > 255) return 255; - } - return (stbi_uc)x; -} - -#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) -#define stbi__fsh(x) ((x) * 4096) - -// derived from jidctint -- DCT_ISLOW -#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ - int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ - p2 = s2; \ - p3 = s6; \ - p1 = (p2+p3) * stbi__f2f(0.5411961f); \ - t2 = p1 + p3*stbi__f2f(-1.847759065f); \ - t3 = p1 + p2*stbi__f2f( 0.765366865f); \ - p2 = s0; \ - p3 = s4; \ - t0 = stbi__fsh(p2+p3); \ - t1 = stbi__fsh(p2-p3); \ - x0 = t0+t3; \ - x3 = t0-t3; \ - x1 = t1+t2; \ - x2 = t1-t2; \ - t0 = s7; \ - t1 = s5; \ - t2 = s3; \ - t3 = s1; \ - p3 = t0+t2; \ - p4 = t1+t3; \ - p1 = t0+t3; \ - p2 = t1+t2; \ - p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ - t0 = t0*stbi__f2f( 0.298631336f); \ - t1 = t1*stbi__f2f( 2.053119869f); \ - t2 = t2*stbi__f2f( 3.072711026f); \ - t3 = t3*stbi__f2f( 1.501321110f); \ - p1 = p5 + p1*stbi__f2f(-0.899976223f); \ - p2 = p5 + p2*stbi__f2f(-2.562915447f); \ - p3 = p3*stbi__f2f(-1.961570560f); \ - p4 = p4*stbi__f2f(-0.390180644f); \ - t3 += p1+p4; \ - t2 += p2+p3; \ - t1 += p2+p4; \ - t0 += p1+p3; - -static void stbi__idct_block(stbi_uc* out, int out_stride, short data[64]) -{ - int i, val[64], * v = val; - stbi_uc* o; - short* d = data; - - // columns - for (i = 0; i < 8; ++i, ++d, ++v) { - // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing - if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 - && d[40] == 0 && d[48] == 0 && d[56] == 0) { - // no shortcut 0 seconds - // (1|2|3|4|5|6|7)==0 0 seconds - // all separate -0.047 seconds - // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds - int dcterm = d[0] * 4; - v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; - } - else { - STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56]) - // constants scaled things up by 1<<12; let's bring them back - // down, but keep 2 extra bits of precision - x0 += 512; x1 += 512; x2 += 512; x3 += 512; - v[0] = (x0 + t3) >> 10; - v[56] = (x0 - t3) >> 10; - v[8] = (x1 + t2) >> 10; - v[48] = (x1 - t2) >> 10; - v[16] = (x2 + t1) >> 10; - v[40] = (x2 - t1) >> 10; - v[24] = (x3 + t0) >> 10; - v[32] = (x3 - t0) >> 10; - } - } - - for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) { - // no fast case since the first 1D IDCT spread components out - STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]) - // constants scaled things up by 1<<12, plus we had 1<<2 from first - // loop, plus horizontal and vertical each scale by sqrt(8) so together - // we've got an extra 1<<3, so 1<<17 total we need to remove. - // so we want to round that, which means adding 0.5 * 1<<17, - // aka 65536. Also, we'll end up with -128 to 127 that we want - // to encode as 0..255 by adding 128, so we'll add that before the shift - x0 += 65536 + (128 << 17); - x1 += 65536 + (128 << 17); - x2 += 65536 + (128 << 17); - x3 += 65536 + (128 << 17); - // tried computing the shifts into temps, or'ing the temps to see - // if any were out of range, but that was slower - o[0] = stbi__clamp((x0 + t3) >> 17); - o[7] = stbi__clamp((x0 - t3) >> 17); - o[1] = stbi__clamp((x1 + t2) >> 17); - o[6] = stbi__clamp((x1 - t2) >> 17); - o[2] = stbi__clamp((x2 + t1) >> 17); - o[5] = stbi__clamp((x2 - t1) >> 17); - o[3] = stbi__clamp((x3 + t0) >> 17); - o[4] = stbi__clamp((x3 - t0) >> 17); - } -} - -#ifdef STBI_SSE2 -// sse2 integer IDCT. not the fastest possible implementation but it -// produces bit-identical results to the generic C version so it's -// fully "transparent". -static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) -{ - // This is constructed to match our regular (generic) integer IDCT exactly. - __m128i row0, row1, row2, row3, row4, row5, row6, row7; - __m128i tmp; - - // dot product constant: even elems=x, odd elems=y -#define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) - -// out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) -// out(1) = c1[even]*x + c1[odd]*y -#define dct_rot(out0,out1, x,y,c0,c1) \ - __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ - __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ - __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ - __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ - __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ - __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) - - // out = in << 12 (in 16-bit, out 32-bit) -#define dct_widen(out, in) \ - __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ - __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) - - // wide add -#define dct_wadd(out, a, b) \ - __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_add_epi32(a##_h, b##_h) - - // wide sub -#define dct_wsub(out, a, b) \ - __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) - - // butterfly a/b, add bias, then shift by "s" and pack -#define dct_bfly32o(out0, out1, a,b,bias,s) \ - { \ - __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ - __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ - dct_wadd(sum, abiased, b); \ - dct_wsub(dif, abiased, b); \ - out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ - out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ - } - - // 8-bit interleave step (for transposes) -#define dct_interleave8(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi8(a, b); \ - b = _mm_unpackhi_epi8(tmp, b) - - // 16-bit interleave step (for transposes) -#define dct_interleave16(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi16(a, b); \ - b = _mm_unpackhi_epi16(tmp, b) - -#define dct_pass(bias,shift) \ - { \ - /* even part */ \ - dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ - __m128i sum04 = _mm_add_epi16(row0, row4); \ - __m128i dif04 = _mm_sub_epi16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ - dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ - __m128i sum17 = _mm_add_epi16(row1, row7); \ - __m128i sum35 = _mm_add_epi16(row3, row5); \ - dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ - dct_wadd(x4, y0o, y4o); \ - dct_wadd(x5, y1o, y5o); \ - dct_wadd(x6, y2o, y5o); \ - dct_wadd(x7, y3o, y4o); \ - dct_bfly32o(row0,row7, x0,x7,bias,shift); \ - dct_bfly32o(row1,row6, x1,x6,bias,shift); \ - dct_bfly32o(row2,row5, x2,x5,bias,shift); \ - dct_bfly32o(row3,row4, x3,x4,bias,shift); \ - } - - __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); - __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f), stbi__f2f(0.5411961f)); - __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); - __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); - __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f), stbi__f2f(-1.961570560f)); - __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f)); - __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f), stbi__f2f(-0.390180644f)); - __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f)); - - // rounding biases in column/row passes, see stbi__idct_block for explanation. - __m128i bias_0 = _mm_set1_epi32(512); - __m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17)); - - // load - row0 = _mm_load_si128((const __m128i*) (data + 0 * 8)); - row1 = _mm_load_si128((const __m128i*) (data + 1 * 8)); - row2 = _mm_load_si128((const __m128i*) (data + 2 * 8)); - row3 = _mm_load_si128((const __m128i*) (data + 3 * 8)); - row4 = _mm_load_si128((const __m128i*) (data + 4 * 8)); - row5 = _mm_load_si128((const __m128i*) (data + 5 * 8)); - row6 = _mm_load_si128((const __m128i*) (data + 6 * 8)); - row7 = _mm_load_si128((const __m128i*) (data + 7 * 8)); - - // column pass - dct_pass(bias_0, 10); - - { - // 16bit 8x8 transpose pass 1 - dct_interleave16(row0, row4); - dct_interleave16(row1, row5); - dct_interleave16(row2, row6); - dct_interleave16(row3, row7); - - // transpose pass 2 - dct_interleave16(row0, row2); - dct_interleave16(row1, row3); - dct_interleave16(row4, row6); - dct_interleave16(row5, row7); - - // transpose pass 3 - dct_interleave16(row0, row1); - dct_interleave16(row2, row3); - dct_interleave16(row4, row5); - dct_interleave16(row6, row7); - } - - // row pass - dct_pass(bias_1, 17); - - { - // pack - __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 - __m128i p1 = _mm_packus_epi16(row2, row3); - __m128i p2 = _mm_packus_epi16(row4, row5); - __m128i p3 = _mm_packus_epi16(row6, row7); - - // 8bit 8x8 transpose pass 1 - dct_interleave8(p0, p2); // a0e0a1e1... - dct_interleave8(p1, p3); // c0g0c1g1... - - // transpose pass 2 - dct_interleave8(p0, p1); // a0c0e0g0... - dct_interleave8(p2, p3); // b0d0f0h0... - - // transpose pass 3 - dct_interleave8(p0, p2); // a0b0c0d0... - dct_interleave8(p1, p3); // a4b4c4d4... - - // store - _mm_storel_epi64((__m128i*) out, p0); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i*) out, p2); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i*) out, p1); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i*) out, p3); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p3, 0x4e)); - } - -#undef dct_const -#undef dct_rot -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_interleave8 -#undef dct_interleave16 -#undef dct_pass -} - -#endif // STBI_SSE2 - -#ifdef STBI_NEON - -// NEON integer IDCT. should produce bit-identical -// results to the generic C version. -static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) -{ - int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; - - int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); - int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); - int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f)); - int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f)); - int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); - int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); - int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); - int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); - int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f)); - int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f)); - int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f)); - int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f)); - -#define dct_long_mul(out, inq, coeff) \ - int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) - -#define dct_long_mac(out, acc, inq, coeff) \ - int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) - -#define dct_widen(out, inq) \ - int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ - int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) - - // wide add -#define dct_wadd(out, a, b) \ - int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vaddq_s32(a##_h, b##_h) - -// wide sub -#define dct_wsub(out, a, b) \ - int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vsubq_s32(a##_h, b##_h) - -// butterfly a/b, then shift using "shiftop" by "s" and pack -#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ - { \ - dct_wadd(sum, a, b); \ - dct_wsub(dif, a, b); \ - out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ - out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ - } - -#define dct_pass(shiftop, shift) \ - { \ - /* even part */ \ - int16x8_t sum26 = vaddq_s16(row2, row6); \ - dct_long_mul(p1e, sum26, rot0_0); \ - dct_long_mac(t2e, p1e, row6, rot0_1); \ - dct_long_mac(t3e, p1e, row2, rot0_2); \ - int16x8_t sum04 = vaddq_s16(row0, row4); \ - int16x8_t dif04 = vsubq_s16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - int16x8_t sum15 = vaddq_s16(row1, row5); \ - int16x8_t sum17 = vaddq_s16(row1, row7); \ - int16x8_t sum35 = vaddq_s16(row3, row5); \ - int16x8_t sum37 = vaddq_s16(row3, row7); \ - int16x8_t sumodd = vaddq_s16(sum17, sum35); \ - dct_long_mul(p5o, sumodd, rot1_0); \ - dct_long_mac(p1o, p5o, sum17, rot1_1); \ - dct_long_mac(p2o, p5o, sum35, rot1_2); \ - dct_long_mul(p3o, sum37, rot2_0); \ - dct_long_mul(p4o, sum15, rot2_1); \ - dct_wadd(sump13o, p1o, p3o); \ - dct_wadd(sump24o, p2o, p4o); \ - dct_wadd(sump23o, p2o, p3o); \ - dct_wadd(sump14o, p1o, p4o); \ - dct_long_mac(x4, sump13o, row7, rot3_0); \ - dct_long_mac(x5, sump24o, row5, rot3_1); \ - dct_long_mac(x6, sump23o, row3, rot3_2); \ - dct_long_mac(x7, sump14o, row1, rot3_3); \ - dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ - dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ - dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ - dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ - } - - // load - row0 = vld1q_s16(data + 0 * 8); - row1 = vld1q_s16(data + 1 * 8); - row2 = vld1q_s16(data + 2 * 8); - row3 = vld1q_s16(data + 3 * 8); - row4 = vld1q_s16(data + 4 * 8); - row5 = vld1q_s16(data + 5 * 8); - row6 = vld1q_s16(data + 6 * 8); - row7 = vld1q_s16(data + 7 * 8); - - // add DC bias - row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); - - // column pass - dct_pass(vrshrn_n_s32, 10); - - // 16bit 8x8 transpose - { - // these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. - // whether compilers actually get this is another story, sadly. -#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } -#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } - - // pass 1 - dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 - dct_trn16(row2, row3); - dct_trn16(row4, row5); - dct_trn16(row6, row7); - - // pass 2 - dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 - dct_trn32(row1, row3); - dct_trn32(row4, row6); - dct_trn32(row5, row7); - - // pass 3 - dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 - dct_trn64(row1, row5); - dct_trn64(row2, row6); - dct_trn64(row3, row7); - -#undef dct_trn16 -#undef dct_trn32 -#undef dct_trn64 - } - - // row pass - // vrshrn_n_s32 only supports shifts up to 16, we need - // 17. so do a non-rounding shift of 16 first then follow - // up with a rounding shift by 1. - dct_pass(vshrn_n_s32, 16); - - { - // pack and round - uint8x8_t p0 = vqrshrun_n_s16(row0, 1); - uint8x8_t p1 = vqrshrun_n_s16(row1, 1); - uint8x8_t p2 = vqrshrun_n_s16(row2, 1); - uint8x8_t p3 = vqrshrun_n_s16(row3, 1); - uint8x8_t p4 = vqrshrun_n_s16(row4, 1); - uint8x8_t p5 = vqrshrun_n_s16(row5, 1); - uint8x8_t p6 = vqrshrun_n_s16(row6, 1); - uint8x8_t p7 = vqrshrun_n_s16(row7, 1); - - // again, these can translate into one instruction, but often don't. -#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } -#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } - - // sadly can't use interleaved stores here since we only write - // 8 bytes to each scan line! - - // 8x8 8-bit transpose pass 1 - dct_trn8_8(p0, p1); - dct_trn8_8(p2, p3); - dct_trn8_8(p4, p5); - dct_trn8_8(p6, p7); - - // pass 2 - dct_trn8_16(p0, p2); - dct_trn8_16(p1, p3); - dct_trn8_16(p4, p6); - dct_trn8_16(p5, p7); - - // pass 3 - dct_trn8_32(p0, p4); - dct_trn8_32(p1, p5); - dct_trn8_32(p2, p6); - dct_trn8_32(p3, p7); - - // store - vst1_u8(out, p0); out += out_stride; - vst1_u8(out, p1); out += out_stride; - vst1_u8(out, p2); out += out_stride; - vst1_u8(out, p3); out += out_stride; - vst1_u8(out, p4); out += out_stride; - vst1_u8(out, p5); out += out_stride; - vst1_u8(out, p6); out += out_stride; - vst1_u8(out, p7); - -#undef dct_trn8_8 -#undef dct_trn8_16 -#undef dct_trn8_32 - } - -#undef dct_long_mul -#undef dct_long_mac -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_pass -} - -#endif // STBI_NEON - -#define STBI__MARKER_none 0xff -// if there's a pending marker from the entropy stream, return that -// otherwise, fetch from the stream and get a marker. if there's no -// marker, return 0xff, which is never a valid marker value -static stbi_uc stbi__get_marker(stbi__jpeg * j) -{ - stbi_uc x; - if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } - x = stbi__get8(j->s); - if (x != 0xff) return STBI__MARKER_none; - while (x == 0xff) - x = stbi__get8(j->s); // consume repeated 0xff fill bytes - return x; -} - -// in each scan, we'll have scan_n components, and the order -// of the components is specified by order[] -#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) - -// after a restart interval, stbi__jpeg_reset the entropy decoder and -// the dc prediction -static void stbi__jpeg_reset(stbi__jpeg* j) -{ - j->code_bits = 0; - j->code_buffer = 0; - j->nomore = 0; - j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; - j->marker = STBI__MARKER_none; - j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; - j->eob_run = 0; - // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, - // since we don't even allow 1<<30 pixels -} - -static int stbi__parse_entropy_coded_data(stbi__jpeg* z) -{ - stbi__jpeg_reset(z); - if (!z->progressive) { - if (z->scan_n == 1) { - int i, j; - STBI_SIMD_ALIGN(short, data[64]); - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x + 7) >> 3; - int h = (z->img_comp[n].y + 7) >> 3; - for (j = 0; j < h; ++j) { - for (i = 0; i < w; ++i) { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - // if it's NOT a restart, then just bail, so we get corrupt data - // rather than no data - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - else { // interleaved - int i, j, k, x, y; - STBI_SIMD_ALIGN(short, data[64]); - for (j = 0; j < z->img_mcu_y; ++j) { - for (i = 0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k = 0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y = 0; y < z->img_comp[n].v; ++y) { - for (x = 0; x < z->img_comp[n].h; ++x) { - int x2 = (i * z->img_comp[n].h + x) * 8; - int y2 = (j * z->img_comp[n].v + y) * 8; - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * y2 + x2, z->img_comp[n].w2, data); - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } - else { - if (z->scan_n == 1) { - int i, j; - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x + 7) >> 3; - int h = (z->img_comp[n].y + 7) >> 3; - for (j = 0; j < h; ++j) { - for (i = 0; i < w; ++i) { - short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - if (z->spec_start == 0) { - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } - else { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) - return 0; - } - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - else { // interleaved - int i, j, k, x, y; - for (j = 0; j < z->img_mcu_y; ++j) { - for (i = 0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k = 0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y = 0; y < z->img_comp[n].v; ++y) { - for (x = 0; x < z->img_comp[n].h; ++x) { - int x2 = (i * z->img_comp[n].h + x); - int y2 = (j * z->img_comp[n].v + y); - short* data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } -} - -static void stbi__jpeg_dequantize(short* data, stbi__uint16* dequant) -{ - int i; - for (i = 0; i < 64; ++i) - data[i] *= dequant[i]; -} - -static void stbi__jpeg_finish(stbi__jpeg* z) -{ - if (z->progressive) { - // dequantize and idct the data - int i, j, n; - for (n = 0; n < z->s->img_n; ++n) { - int w = (z->img_comp[n].x + 7) >> 3; - int h = (z->img_comp[n].y + 7) >> 3; - for (j = 0; j < h; ++j) { - for (i = 0; i < w; ++i) { - short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); - z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); - } - } - } - } -} - -static int stbi__process_marker(stbi__jpeg* z, int m) -{ - int L; - switch (m) { - case STBI__MARKER_none: // no marker found - return stbi__err("expected marker", "Corrupt JPEG"); - - case 0xDD: // DRI - specify restart interval - if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len", "Corrupt JPEG"); - z->restart_interval = stbi__get16be(z->s); - return 1; - - case 0xDB: // DQT - define quantization table - L = stbi__get16be(z->s) - 2; - while (L > 0) { - int q = stbi__get8(z->s); - int p = q >> 4, sixteen = (p != 0); - int t = q & 15, i; - if (p != 0 && p != 1) return stbi__err("bad DQT type", "Corrupt JPEG"); - if (t > 3) return stbi__err("bad DQT table", "Corrupt JPEG"); - - for (i = 0; i < 64; ++i) - z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); - L -= (sixteen ? 129 : 65); - } - return L == 0; - - case 0xC4: // DHT - define huffman table - L = stbi__get16be(z->s) - 2; - while (L > 0) { - stbi_uc* v; - int sizes[16], i, n = 0; - int q = stbi__get8(z->s); - int tc = q >> 4; - int th = q & 15; - if (tc > 1 || th > 3) return stbi__err("bad DHT header", "Corrupt JPEG"); - for (i = 0; i < 16; ++i) { - sizes[i] = stbi__get8(z->s); - n += sizes[i]; - } - L -= 17; - if (tc == 0) { - if (!stbi__build_huffman(z->huff_dc + th, sizes)) return 0; - v = z->huff_dc[th].values; - } - else { - if (!stbi__build_huffman(z->huff_ac + th, sizes)) return 0; - v = z->huff_ac[th].values; - } - for (i = 0; i < n; ++i) - v[i] = stbi__get8(z->s); - if (tc != 0) - stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); - L -= n; - } - return L == 0; - } - - // check for comment block or APP blocks - if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { - L = stbi__get16be(z->s); - if (L < 2) { - if (m == 0xFE) - return stbi__err("bad COM len", "Corrupt JPEG"); - else - return stbi__err("bad APP len", "Corrupt JPEG"); - } - L -= 2; - - if (m == 0xE0 && L >= 5) { // JFIF APP0 segment - static const unsigned char tag[5] = { 'J','F','I','F','\0' }; - int ok = 1; - int i; - for (i = 0; i < 5; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 5; - if (ok) - z->jfif = 1; - } - else if (m == 0xEE && L >= 12) { // Adobe APP14 segment - static const unsigned char tag[6] = { 'A','d','o','b','e','\0' }; - int ok = 1; - int i; - for (i = 0; i < 6; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 6; - if (ok) { - stbi__get8(z->s); // version - stbi__get16be(z->s); // flags0 - stbi__get16be(z->s); // flags1 - z->app14_color_transform = stbi__get8(z->s); // color transform - L -= 6; - } - } - - stbi__skip(z->s, L); - return 1; - } - - return stbi__err("unknown marker", "Corrupt JPEG"); -} - -// after we see SOS -static int stbi__process_scan_header(stbi__jpeg* z) -{ - int i; - int Ls = stbi__get16be(z->s); - z->scan_n = stbi__get8(z->s); - if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n) return stbi__err("bad SOS component count", "Corrupt JPEG"); - if (Ls != 6 + 2 * z->scan_n) return stbi__err("bad SOS len", "Corrupt JPEG"); - for (i = 0; i < z->scan_n; ++i) { - int id = stbi__get8(z->s), which; - int q = stbi__get8(z->s); - for (which = 0; which < z->s->img_n; ++which) - if (z->img_comp[which].id == id) - break; - if (which == z->s->img_n) return 0; // no match - z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff", "Corrupt JPEG"); - z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff", "Corrupt JPEG"); - z->order[i] = which; - } - - { - int aa; - z->spec_start = stbi__get8(z->s); - z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 - aa = stbi__get8(z->s); - z->succ_high = (aa >> 4); - z->succ_low = (aa & 15); - if (z->progressive) { - if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) - return stbi__err("bad SOS", "Corrupt JPEG"); - } - else { - if (z->spec_start != 0) return stbi__err("bad SOS", "Corrupt JPEG"); - if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS", "Corrupt JPEG"); - z->spec_end = 63; - } - } - - return 1; -} - -static int stbi__free_jpeg_components(stbi__jpeg* z, int ncomp, int why) -{ - int i; - for (i = 0; i < ncomp; ++i) { - if (z->img_comp[i].raw_data) { - STBI_FREE(z->img_comp[i].raw_data); - z->img_comp[i].raw_data = NULL; - z->img_comp[i].data = NULL; - } - if (z->img_comp[i].raw_coeff) { - STBI_FREE(z->img_comp[i].raw_coeff); - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].coeff = 0; - } - if (z->img_comp[i].linebuf) { - STBI_FREE(z->img_comp[i].linebuf); - z->img_comp[i].linebuf = NULL; - } - } - return why; -} - -static int stbi__process_frame_header(stbi__jpeg* z, int scan) -{ - stbi__context* s = z->s; - int Lf, p, i, q, h_max = 1, v_max = 1, c; - Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG - p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit", "JPEG format not supported: 8-bit only"); // JPEG baseline - s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG - s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires - c = stbi__get8(s); - if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count", "Corrupt JPEG"); - s->img_n = c; - for (i = 0; i < c; ++i) { - z->img_comp[i].data = NULL; - z->img_comp[i].linebuf = NULL; - } - - if (Lf != 8 + 3 * s->img_n) return stbi__err("bad SOF len", "Corrupt JPEG"); - - z->rgb = 0; - for (i = 0; i < s->img_n; ++i) { - static const unsigned char rgb[3] = { 'R', 'G', 'B' }; - z->img_comp[i].id = stbi__get8(s); - if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) - ++z->rgb; - q = stbi__get8(s); - z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H", "Corrupt JPEG"); - z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V", "Corrupt JPEG"); - z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ", "Corrupt JPEG"); - } - - if (scan != STBI__SCAN_load) return 1; - - if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); - - for (i = 0; i < s->img_n; ++i) { - if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; - if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; - } - - // compute interleaved mcu info - z->img_h_max = h_max; - z->img_v_max = v_max; - z->img_mcu_w = h_max * 8; - z->img_mcu_h = v_max * 8; - // these sizes can't be more than 17 bits - z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w; - z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h; - - for (i = 0; i < s->img_n; ++i) { - // number of effective pixels (e.g. for non-interleaved MCU) - z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max; - z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max; - // to simplify generation, we'll allocate enough memory to decode - // the bogus oversized data from using interleaved MCUs and their - // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't - // discard the extra data until colorspace conversion - // - // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) - // so these muls can't overflow with 32-bit ints (which we require) - z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; - z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; - z->img_comp[i].coeff = 0; - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].linebuf = NULL; - z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); - if (z->img_comp[i].raw_data == NULL) - return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); - // align blocks for idct using mmx/sse - z->img_comp[i].data = (stbi_uc*)(((size_t)z->img_comp[i].raw_data + 15) & ~15); - if (z->progressive) { - // w2, h2 are multiples of 8 (see above) - z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; - z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; - z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); - if (z->img_comp[i].raw_coeff == NULL) - return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); - z->img_comp[i].coeff = (short*)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15); - } - } - - return 1; -} - -// use comparisons since in some cases we handle more than one case (e.g. SOF) -#define stbi__DNL(x) ((x) == 0xdc) -#define stbi__SOI(x) ((x) == 0xd8) -#define stbi__EOI(x) ((x) == 0xd9) -#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) -#define stbi__SOS(x) ((x) == 0xda) - -#define stbi__SOF_progressive(x) ((x) == 0xc2) - -static int stbi__decode_jpeg_header(stbi__jpeg* z, int scan) -{ - int m; - z->jfif = 0; - z->app14_color_transform = -1; // valid values are 0,1,2 - z->marker = STBI__MARKER_none; // initialize cached marker to empty - m = stbi__get_marker(z); - if (!stbi__SOI(m)) return stbi__err("no SOI", "Corrupt JPEG"); - if (scan == STBI__SCAN_type) return 1; - m = stbi__get_marker(z); - while (!stbi__SOF(m)) { - if (!stbi__process_marker(z, m)) return 0; - m = stbi__get_marker(z); - while (m == STBI__MARKER_none) { - // some files have extra padding after their blocks, so ok, we'll scan - if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); - m = stbi__get_marker(z); - } - } - z->progressive = stbi__SOF_progressive(m); - if (!stbi__process_frame_header(z, scan)) return 0; - return 1; -} - -// decode image to YCbCr format -static int stbi__decode_jpeg_image(stbi__jpeg* j) -{ - int m; - for (m = 0; m < 4; m++) { - j->img_comp[m].raw_data = NULL; - j->img_comp[m].raw_coeff = NULL; - } - j->restart_interval = 0; - if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; - m = stbi__get_marker(j); - while (!stbi__EOI(m)) { - if (stbi__SOS(m)) { - if (!stbi__process_scan_header(j)) return 0; - if (!stbi__parse_entropy_coded_data(j)) return 0; - if (j->marker == STBI__MARKER_none) { - // handle 0s at the end of image data from IP Kamera 9060 - while (!stbi__at_eof(j->s)) { - int x = stbi__get8(j->s); - if (x == 255) { - j->marker = stbi__get8(j->s); - break; - } - } - // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 - } - } - else if (stbi__DNL(m)) { - int Ld = stbi__get16be(j->s); - stbi__uint32 NL = stbi__get16be(j->s); - if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); - if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); - } - else { - if (!stbi__process_marker(j, m)) return 0; - } - m = stbi__get_marker(j); - } - if (j->progressive) - stbi__jpeg_finish(j); - return 1; -} - -// static jfif-centered resampling (across block boundaries) - -typedef stbi_uc* (*resample_row_func)(stbi_uc* out, stbi_uc* in0, stbi_uc* in1, - int w, int hs); - -#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) - -static stbi_uc* resample_row_1(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - STBI_NOTUSED(out); - STBI_NOTUSED(in_far); - STBI_NOTUSED(w); - STBI_NOTUSED(hs); - return in_near; -} - -static stbi_uc* stbi__resample_row_v_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate two samples vertically for every one in input - int i; - STBI_NOTUSED(hs); - for (i = 0; i < w; ++i) - out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2); - return out; -} - -static stbi_uc* stbi__resample_row_h_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate two samples horizontally for every one in input - int i; - stbi_uc* input = in_near; - - if (w == 1) { - // if only one sample, can't do any interpolation - out[0] = out[1] = input[0]; - return out; - } - - out[0] = input[0]; - out[1] = stbi__div4(input[0] * 3 + input[1] + 2); - for (i = 1; i < w - 1; ++i) { - int n = 3 * input[i] + 2; - out[i * 2 + 0] = stbi__div4(n + input[i - 1]); - out[i * 2 + 1] = stbi__div4(n + input[i + 1]); - } - out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2); - out[i * 2 + 1] = input[w - 1]; - - STBI_NOTUSED(in_far); - STBI_NOTUSED(hs); - - return out; -} - -#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) - -static stbi_uc* stbi__resample_row_hv_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i, t0, t1; - if (w == 1) { - out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3 * in_near[0] + in_far[0]; - out[0] = stbi__div4(t1 + 2); - for (i = 1; i < w; ++i) { - t0 = t1; - t1 = 3 * in_near[i] + in_far[i]; - out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); - out[i * 2] = stbi__div16(3 * t1 + t0 + 8); - } - out[w * 2 - 1] = stbi__div4(t1 + 2); - - STBI_NOTUSED(hs); - - return out; -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static stbi_uc* stbi__resample_row_hv_2_simd(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i = 0, t0, t1; - - if (w == 1) { - out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3 * in_near[0] + in_far[0]; - // process groups of 8 pixels for as long as we can. - // note we can't handle the last pixel in a row in this loop - // because we need to handle the filter boundary conditions. - for (; i < ((w - 1) & ~7); i += 8) { -#if defined(STBI_SSE2) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - __m128i zero = _mm_setzero_si128(); - __m128i farb = _mm_loadl_epi64((__m128i*) (in_far + i)); - __m128i nearb = _mm_loadl_epi64((__m128i*) (in_near + i)); - __m128i farw = _mm_unpacklo_epi8(farb, zero); - __m128i nearw = _mm_unpacklo_epi8(nearb, zero); - __m128i diff = _mm_sub_epi16(farw, nearw); - __m128i nears = _mm_slli_epi16(nearw, 2); - __m128i curr = _mm_add_epi16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - __m128i prv0 = _mm_slli_si128(curr, 2); - __m128i nxt0 = _mm_srli_si128(curr, 2); - __m128i prev = _mm_insert_epi16(prv0, t1, 0); - __m128i next = _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - __m128i bias = _mm_set1_epi16(8); - __m128i curs = _mm_slli_epi16(curr, 2); - __m128i prvd = _mm_sub_epi16(prev, curr); - __m128i nxtd = _mm_sub_epi16(next, curr); - __m128i curb = _mm_add_epi16(curs, bias); - __m128i even = _mm_add_epi16(prvd, curb); - __m128i odd = _mm_add_epi16(nxtd, curb); - - // interleave even and odd pixels, then undo scaling. - __m128i int0 = _mm_unpacklo_epi16(even, odd); - __m128i int1 = _mm_unpackhi_epi16(even, odd); - __m128i de0 = _mm_srli_epi16(int0, 4); - __m128i de1 = _mm_srli_epi16(int1, 4); - - // pack and write output - __m128i outv = _mm_packus_epi16(de0, de1); - _mm_storeu_si128((__m128i*) (out + i * 2), outv); -#elif defined(STBI_NEON) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - uint8x8_t farb = vld1_u8(in_far + i); - uint8x8_t nearb = vld1_u8(in_near + i); - int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); - int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); - int16x8_t curr = vaddq_s16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - int16x8_t prv0 = vextq_s16(curr, curr, 7); - int16x8_t nxt0 = vextq_s16(curr, curr, 1); - int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); - int16x8_t next = vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - int16x8_t curs = vshlq_n_s16(curr, 2); - int16x8_t prvd = vsubq_s16(prev, curr); - int16x8_t nxtd = vsubq_s16(next, curr); - int16x8_t even = vaddq_s16(curs, prvd); - int16x8_t odd = vaddq_s16(curs, nxtd); - - // undo scaling and round, then store with even/odd phases interleaved - uint8x8x2_t o; - o.val[0] = vqrshrun_n_s16(even, 4); - o.val[1] = vqrshrun_n_s16(odd, 4); - vst2_u8(out + i * 2, o); -#endif - - // "previous" value for next iter - t1 = 3 * in_near[i + 7] + in_far[i + 7]; - } - - t0 = t1; - t1 = 3 * in_near[i] + in_far[i]; - out[i * 2] = stbi__div16(3 * t1 + t0 + 8); - - for (++i; i < w; ++i) { - t0 = t1; - t1 = 3 * in_near[i] + in_far[i]; - out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); - out[i * 2] = stbi__div16(3 * t1 + t0 + 8); - } - out[w * 2 - 1] = stbi__div4(t1 + 2); - - STBI_NOTUSED(hs); - - return out; -} -#endif - -static stbi_uc* stbi__resample_row_generic(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // resample with nearest-neighbor - int i, j; - STBI_NOTUSED(in_far); - for (i = 0; i < w; ++i) - for (j = 0; j < hs; ++j) - out[i * hs + j] = in_near[i]; - return out; -} - -// this is a reduced-precision calculation of YCbCr-to-RGB introduced -// to make sure the code produces the same results in both SIMD and scalar -#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) -static void stbi__YCbCr_to_RGB_row(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step) -{ - int i; - for (i = 0; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1 << 19); // rounding - int r, g, b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr * stbi__float2fixed(1.40200f); - g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb * stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned)r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned)g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned)b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static void stbi__YCbCr_to_RGB_simd(stbi_uc* out, stbi_uc const* y, stbi_uc const* pcb, stbi_uc const* pcr, int count, int step) -{ - int i = 0; - -#ifdef STBI_SSE2 - // step == 3 is pretty ugly on the final interleave, and i'm not convinced - // it's useful in practice (you wouldn't use it for textures, for example). - // so just accelerate step == 4 case. - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - __m128i signflip = _mm_set1_epi8(-0x80); - __m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f)); - __m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f)); - __m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f)); - __m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f)); - __m128i y_bias = _mm_set1_epi8((char)(unsigned char)128); - __m128i xw = _mm_set1_epi16(255); // alpha channel - - for (; i + 7 < count; i += 8) { - // load - __m128i y_bytes = _mm_loadl_epi64((__m128i*) (y + i)); - __m128i cr_bytes = _mm_loadl_epi64((__m128i*) (pcr + i)); - __m128i cb_bytes = _mm_loadl_epi64((__m128i*) (pcb + i)); - __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 - __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 - - // unpack to short (and left-shift cr, cb by 8) - __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); - __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); - __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); - - // color transform - __m128i yws = _mm_srli_epi16(yw, 4); - __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); - __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); - __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); - __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); - __m128i rws = _mm_add_epi16(cr0, yws); - __m128i gwt = _mm_add_epi16(cb0, yws); - __m128i bws = _mm_add_epi16(yws, cb1); - __m128i gws = _mm_add_epi16(gwt, cr1); - - // descale - __m128i rw = _mm_srai_epi16(rws, 4); - __m128i bw = _mm_srai_epi16(bws, 4); - __m128i gw = _mm_srai_epi16(gws, 4); - - // back to byte, set up for transpose - __m128i brb = _mm_packus_epi16(rw, bw); - __m128i gxb = _mm_packus_epi16(gw, xw); - - // transpose to interleave channels - __m128i t0 = _mm_unpacklo_epi8(brb, gxb); - __m128i t1 = _mm_unpackhi_epi8(brb, gxb); - __m128i o0 = _mm_unpacklo_epi16(t0, t1); - __m128i o1 = _mm_unpackhi_epi16(t0, t1); - - // store - _mm_storeu_si128((__m128i*) (out + 0), o0); - _mm_storeu_si128((__m128i*) (out + 16), o1); - out += 32; - } - } -#endif - -#ifdef STBI_NEON - // in this version, step=3 support would be easy to add. but is there demand? - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - uint8x8_t signflip = vdup_n_u8(0x80); - int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f)); - int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f)); - int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f)); - int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f)); - - for (; i + 7 < count; i += 8) { - // load - uint8x8_t y_bytes = vld1_u8(y + i); - uint8x8_t cr_bytes = vld1_u8(pcr + i); - uint8x8_t cb_bytes = vld1_u8(pcb + i); - int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); - int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); - - // expand to s16 - int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); - int16x8_t crw = vshll_n_s8(cr_biased, 7); - int16x8_t cbw = vshll_n_s8(cb_biased, 7); - - // color transform - int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); - int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); - int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); - int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); - int16x8_t rws = vaddq_s16(yws, cr0); - int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); - int16x8_t bws = vaddq_s16(yws, cb1); - - // undo scaling, round, convert to byte - uint8x8x4_t o; - o.val[0] = vqrshrun_n_s16(rws, 4); - o.val[1] = vqrshrun_n_s16(gws, 4); - o.val[2] = vqrshrun_n_s16(bws, 4); - o.val[3] = vdup_n_u8(255); - - // store, interleaving r/g/b/a - vst4_u8(out, o); - out += 8 * 4; - } - } -#endif - - for (; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1 << 19); // rounding - int r, g, b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr * stbi__float2fixed(1.40200f); - g = y_fixed + cr * -stbi__float2fixed(0.71414f) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb * stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned)r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned)g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned)b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} -#endif - -// set up the kernels -static void stbi__setup_jpeg(stbi__jpeg* j) -{ - j->idct_block_kernel = stbi__idct_block; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; - -#ifdef STBI_SSE2 - if (stbi__sse2_available()) { - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; - } -#endif - -#ifdef STBI_NEON - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; -#endif -} - -// clean up the temporary component buffers -static void stbi__cleanup_jpeg(stbi__jpeg* j) -{ - stbi__free_jpeg_components(j, j->s->img_n, 0); -} - -typedef struct -{ - resample_row_func resample; - stbi_uc* line0, * line1; - int hs, vs; // expansion factor in each axis - int w_lores; // horizontal pixels pre-expansion - int ystep; // how far through vertical expansion we are - int ypos; // which pre-expansion row we're on -} stbi__resample; - -// fast 0..255 * 0..255 => 0..255 rounded multiplication -static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) -{ - unsigned int t = x * y + 128; - return (stbi_uc)((t + (t >> 8)) >> 8); -} - -static stbi_uc* load_jpeg_image(stbi__jpeg* z, int* out_x, int* out_y, int* comp, int req_comp) -{ - int n, decode_n, is_rgb; - z->s->img_n = 0; // make stbi__cleanup_jpeg safe - - // validate req_comp - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - - // load a jpeg image from whichever source, but leave in YCbCr format - if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } - - // determine actual number of components to generate - n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; - - is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); - - if (z->s->img_n == 3 && n < 3 && !is_rgb) - decode_n = 1; - else - decode_n = z->s->img_n; - - // resample and color-convert - { - int k; - unsigned int i, j; - stbi_uc* output; - stbi_uc* coutput[4]; - - stbi__resample res_comp[4]; - - for (k = 0; k < decode_n; ++k) { - stbi__resample* r = &res_comp[k]; - - // allocate line buffer big enough for upsampling off the edges - // with upsample factor of 4 - z->img_comp[k].linebuf = (stbi_uc*)stbi__malloc(z->s->img_x + 3); - if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - r->hs = z->img_h_max / z->img_comp[k].h; - r->vs = z->img_v_max / z->img_comp[k].v; - r->ystep = r->vs >> 1; - r->w_lores = (z->s->img_x + r->hs - 1) / r->hs; - r->ypos = 0; - r->line0 = r->line1 = z->img_comp[k].data; - - if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; - else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; - else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; - else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; - else r->resample = stbi__resample_row_generic; - } - - // can't error after this so, this is safe - output = (stbi_uc*)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); - if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - // now go ahead and resample - for (j = 0; j < z->s->img_y; ++j) { - stbi_uc* out = output + n * z->s->img_x * j; - for (k = 0; k < decode_n; ++k) { - stbi__resample* r = &res_comp[k]; - int y_bot = r->ystep >= (r->vs >> 1); - coutput[k] = r->resample(z->img_comp[k].linebuf, - y_bot ? r->line1 : r->line0, - y_bot ? r->line0 : r->line1, - r->w_lores, r->hs); - if (++r->ystep >= r->vs) { - r->ystep = 0; - r->line0 = r->line1; - if (++r->ypos < z->img_comp[k].y) - r->line1 += z->img_comp[k].w2; - } - } - if (n >= 3) { - stbi_uc* y = coutput[0]; - if (z->s->img_n == 3) { - if (is_rgb) { - for (i = 0; i < z->s->img_x; ++i) { - out[0] = y[i]; - out[1] = coutput[1][i]; - out[2] = coutput[2][i]; - out[3] = 255; - out += n; - } - } - else { - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } - else if (z->s->img_n == 4) { - if (z->app14_color_transform == 0) { // CMYK - for (i = 0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(coutput[0][i], m); - out[1] = stbi__blinn_8x8(coutput[1][i], m); - out[2] = stbi__blinn_8x8(coutput[2][i], m); - out[3] = 255; - out += n; - } - } - else if (z->app14_color_transform == 2) { // YCCK - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - for (i = 0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(255 - out[0], m); - out[1] = stbi__blinn_8x8(255 - out[1], m); - out[2] = stbi__blinn_8x8(255 - out[2], m); - out += n; - } - } - else { // YCbCr + alpha? Ignore the fourth channel for now - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } - else - for (i = 0; i < z->s->img_x; ++i) { - out[0] = out[1] = out[2] = y[i]; - out[3] = 255; // not used if n==3 - out += n; - } - } - else { - if (is_rgb) { - if (n == 1) - for (i = 0; i < z->s->img_x; ++i) - * out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - else { - for (i = 0; i < z->s->img_x; ++i, out += 2) { - out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - out[1] = 255; - } - } - } - else if (z->s->img_n == 4 && z->app14_color_transform == 0) { - for (i = 0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); - stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); - stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); - out[0] = stbi__compute_y(r, g, b); - out[1] = 255; - out += n; - } - } - else if (z->s->img_n == 4 && z->app14_color_transform == 2) { - for (i = 0; i < z->s->img_x; ++i) { - out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); - out[1] = 255; - out += n; - } - } - else { - stbi_uc* y = coutput[0]; - if (n == 1) - for (i = 0; i < z->s->img_x; ++i) out[i] = y[i]; - else - for (i = 0; i < z->s->img_x; ++i)* out++ = y[i], * out++ = 255; - } - } - } - stbi__cleanup_jpeg(z); - *out_x = z->s->img_x; - *out_y = z->s->img_y; - if (comp)* comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output - return output; - } -} - -static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - unsigned char* result; - stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); - STBI_NOTUSED(ri); - j->s = s; - stbi__setup_jpeg(j); - result = load_jpeg_image(j, x, y, comp, req_comp); - STBI_FREE(j); - return result; -} - -static int stbi__jpeg_test(stbi__context* s) -{ - int r; - stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); - j->s = s; - stbi__setup_jpeg(j); - r = stbi__decode_jpeg_header(j, STBI__SCAN_type); - stbi__rewind(s); - STBI_FREE(j); - return r; -} - -static int stbi__jpeg_info_raw(stbi__jpeg* j, int* x, int* y, int* comp) -{ - if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { - stbi__rewind(j->s); - return 0; - } - if (x)* x = j->s->img_x; - if (y)* y = j->s->img_y; - if (comp)* comp = j->s->img_n >= 3 ? 3 : 1; - return 1; -} - -static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp) -{ - int result; - stbi__jpeg* j = (stbi__jpeg*)(stbi__malloc(sizeof(stbi__jpeg))); - j->s = s; - result = stbi__jpeg_info_raw(j, x, y, comp); - STBI_FREE(j); - return result; -} -#endif - -// public domain zlib decode v0.2 Sean Barrett 2006-11-18 -// simple implementation -// - all input must be provided in an upfront buffer -// - all output is written to a single output buffer (can malloc/realloc) -// performance -// - fast huffman - -#ifndef STBI_NO_ZLIB - -// fast-way is faster to check than jpeg huffman, but slow way is slower -#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables -#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) - -// zlib-style huffman encoding -// (jpegs packs from left, zlib from right, so can't share code) -typedef struct -{ - stbi__uint16 fast[1 << STBI__ZFAST_BITS]; - stbi__uint16 firstcode[16]; - int maxcode[17]; - stbi__uint16 firstsymbol[16]; - stbi_uc size[288]; - stbi__uint16 value[288]; -} stbi__zhuffman; - -stbi_inline static int stbi__bitreverse16(int n) -{ - n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); - n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); - n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); - n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); - return n; -} - -stbi_inline static int stbi__bit_reverse(int v, int bits) -{ - STBI_ASSERT(bits <= 16); - // to bit reverse n bits, reverse 16 and shift - // e.g. 11 bits, bit reverse and shift away 5 - return stbi__bitreverse16(v) >> (16 - bits); -} - -static int stbi__zbuild_huffman(stbi__zhuffman* z, const stbi_uc* sizelist, int num) -{ - int i, k = 0; - int code, next_code[16], sizes[17]; - - // DEFLATE spec for generating codes - memset(sizes, 0, sizeof(sizes)); - memset(z->fast, 0, sizeof(z->fast)); - for (i = 0; i < num; ++i) - ++sizes[sizelist[i]]; - sizes[0] = 0; - for (i = 1; i < 16; ++i) - if (sizes[i] > (1 << i)) - return stbi__err("bad sizes", "Corrupt PNG"); - code = 0; - for (i = 1; i < 16; ++i) { - next_code[i] = code; - z->firstcode[i] = (stbi__uint16)code; - z->firstsymbol[i] = (stbi__uint16)k; - code = (code + sizes[i]); - if (sizes[i]) - if (code - 1 >= (1 << i)) return stbi__err("bad codelengths", "Corrupt PNG"); - z->maxcode[i] = code << (16 - i); // preshift for inner loop - code <<= 1; - k += sizes[i]; - } - z->maxcode[16] = 0x10000; // sentinel - for (i = 0; i < num; ++i) { - int s = sizelist[i]; - if (s) { - int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; - stbi__uint16 fastv = (stbi__uint16)((s << 9) | i); - z->size[c] = (stbi_uc)s; - z->value[c] = (stbi__uint16)i; - if (s <= STBI__ZFAST_BITS) { - int j = stbi__bit_reverse(next_code[s], s); - while (j < (1 << STBI__ZFAST_BITS)) { - z->fast[j] = fastv; - j += (1 << s); - } - } - ++next_code[s]; - } - } - return 1; -} - -// zlib-from-memory implementation for PNG reading -// because PNG allows splitting the zlib stream arbitrarily, -// and it's annoying structurally to have PNG call ZLIB call PNG, -// we require PNG read all the IDATs and combine them into a single -// memory buffer - -typedef struct -{ - stbi_uc* zbuffer, * zbuffer_end; - int num_bits; - stbi__uint32 code_buffer; - - char* zout; - char* zout_start; - char* zout_end; - int z_expandable; - - stbi__zhuffman z_length, z_distance; -} stbi__zbuf; - -stbi_inline static stbi_uc stbi__zget8(stbi__zbuf* z) -{ - if (z->zbuffer >= z->zbuffer_end) return 0; - return *z->zbuffer++; -} - -static void stbi__fill_bits(stbi__zbuf* z) -{ - do { - STBI_ASSERT(z->code_buffer < (1U << z->num_bits)); - z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits; - z->num_bits += 8; - } while (z->num_bits <= 24); -} - -stbi_inline static unsigned int stbi__zreceive(stbi__zbuf* z, int n) -{ - unsigned int k; - if (z->num_bits < n) stbi__fill_bits(z); - k = z->code_buffer & ((1 << n) - 1); - z->code_buffer >>= n; - z->num_bits -= n; - return k; -} - -static int stbi__zhuffman_decode_slowpath(stbi__zbuf* a, stbi__zhuffman* z) -{ - int b, s, k; - // not resolved by fast table, so compute it the slow way - // use jpeg approach, which requires MSbits at top - k = stbi__bit_reverse(a->code_buffer, 16); - for (s = STBI__ZFAST_BITS + 1; ; ++s) - if (k < z->maxcode[s]) - break; - if (s == 16) return -1; // invalid code! - // code size is s, so: - b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s]; - STBI_ASSERT(z->size[b] == s); - a->code_buffer >>= s; - a->num_bits -= s; - return z->value[b]; -} - -stbi_inline static int stbi__zhuffman_decode(stbi__zbuf* a, stbi__zhuffman* z) -{ - int b, s; - if (a->num_bits < 16) stbi__fill_bits(a); - b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; - if (b) { - s = b >> 9; - a->code_buffer >>= s; - a->num_bits -= s; - return b & 511; - } - return stbi__zhuffman_decode_slowpath(a, z); -} - -static int stbi__zexpand(stbi__zbuf* z, char* zout, int n) // need to make room for n bytes -{ - char* q; - int cur, limit, old_limit; - z->zout = zout; - if (!z->z_expandable) return stbi__err("output buffer limit", "Corrupt PNG"); - cur = (int)(z->zout - z->zout_start); - limit = old_limit = (int)(z->zout_end - z->zout_start); - while (cur + n > limit) - limit *= 2; - q = (char*)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); - STBI_NOTUSED(old_limit); - if (q == NULL) return stbi__err("outofmem", "Out of memory"); - z->zout_start = q; - z->zout = q + cur; - z->zout_end = q + limit; - return 1; -} - -static const int stbi__zlength_base[31] = { - 3,4,5,6,7,8,9,10,11,13, - 15,17,19,23,27,31,35,43,51,59, - 67,83,99,115,131,163,195,227,258,0,0 }; - -static const int stbi__zlength_extra[31] = -{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; - -static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, -257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0 }; - -static const int stbi__zdist_extra[32] = -{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 }; - -static int stbi__parse_huffman_block(stbi__zbuf* a) -{ - char* zout = a->zout; - for (;;) { - int z = stbi__zhuffman_decode(a, &a->z_length); - if (z < 256) { - if (z < 0) return stbi__err("bad huffman code", "Corrupt PNG"); // error in huffman codes - if (zout >= a->zout_end) { - if (!stbi__zexpand(a, zout, 1)) return 0; - zout = a->zout; - } - *zout++ = (char)z; - } - else { - stbi_uc* p; - int len, dist; - if (z == 256) { - a->zout = zout; - return 1; - } - z -= 257; - len = stbi__zlength_base[z]; - if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); - z = stbi__zhuffman_decode(a, &a->z_distance); - if (z < 0) return stbi__err("bad huffman code", "Corrupt PNG"); - dist = stbi__zdist_base[z]; - if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); - if (zout - a->zout_start < dist) return stbi__err("bad dist", "Corrupt PNG"); - if (zout + len > a->zout_end) { - if (!stbi__zexpand(a, zout, len)) return 0; - zout = a->zout; - } - p = (stbi_uc*)(zout - dist); - if (dist == 1) { // run of one byte; common in images. - stbi_uc v = *p; - if (len) { do *zout++ = v; while (--len); } - } - else { - if (len) { do *zout++ = *p++; while (--len); } - } - } - } -} - -static int stbi__compute_huffman_codes(stbi__zbuf* a) -{ - static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; - stbi__zhuffman z_codelength; - stbi_uc lencodes[286 + 32 + 137];//padding for maximum single op - stbi_uc codelength_sizes[19]; - int i, n; - - int hlit = stbi__zreceive(a, 5) + 257; - int hdist = stbi__zreceive(a, 5) + 1; - int hclen = stbi__zreceive(a, 4) + 4; - int ntot = hlit + hdist; - - memset(codelength_sizes, 0, sizeof(codelength_sizes)); - for (i = 0; i < hclen; ++i) { - int s = stbi__zreceive(a, 3); - codelength_sizes[length_dezigzag[i]] = (stbi_uc)s; - } - if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; - - n = 0; - while (n < ntot) { - int c = stbi__zhuffman_decode(a, &z_codelength); - if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); - if (c < 16) - lencodes[n++] = (stbi_uc)c; - else { - stbi_uc fill = 0; - if (c == 16) { - c = stbi__zreceive(a, 2) + 3; - if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); - fill = lencodes[n - 1]; - } - else if (c == 17) - c = stbi__zreceive(a, 3) + 3; - else { - STBI_ASSERT(c == 18); - c = stbi__zreceive(a, 7) + 11; - } - if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); - memset(lencodes + n, fill, c); - n += c; - } - } - if (n != ntot) return stbi__err("bad codelengths", "Corrupt PNG"); - if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist)) return 0; - return 1; -} - -static int stbi__parse_uncompressed_block(stbi__zbuf* a) -{ - stbi_uc header[4]; - int len, nlen, k; - if (a->num_bits & 7) - stbi__zreceive(a, a->num_bits & 7); // discard - // drain the bit-packed data into header - k = 0; - while (a->num_bits > 0) { - header[k++] = (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check - a->code_buffer >>= 8; - a->num_bits -= 8; - } - STBI_ASSERT(a->num_bits == 0); - // now fill header the normal way - while (k < 4) - header[k++] = stbi__zget8(a); - len = header[1] * 256 + header[0]; - nlen = header[3] * 256 + header[2]; - if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt", "Corrupt PNG"); - if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer", "Corrupt PNG"); - if (a->zout + len > a->zout_end) - if (!stbi__zexpand(a, a->zout, len)) return 0; - memcpy(a->zout, a->zbuffer, len); - a->zbuffer += len; - a->zout += len; - return 1; -} - -static int stbi__parse_zlib_header(stbi__zbuf* a) -{ - int cmf = stbi__zget8(a); - int cm = cmf & 15; - /* int cinfo = cmf >> 4; */ - int flg = stbi__zget8(a); - if ((cmf * 256 + flg) % 31 != 0) return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec - if (flg & 32) return stbi__err("no preset dict", "Corrupt PNG"); // preset dictionary not allowed in png - if (cm != 8) return stbi__err("bad compression", "Corrupt PNG"); // DEFLATE required for png - // window = 1 << (8 + cinfo)... but who cares, we fully buffer output - return 1; -} - -static const stbi_uc stbi__zdefault_length[288] = -{ - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 -}; -static const stbi_uc stbi__zdefault_distance[32] = -{ - 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 -}; -/* -Init algorithm: -{ - int i; // use <= to match clearly with spec - for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; - for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; - for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; - for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; - - for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; -} -*/ - -static int stbi__parse_zlib(stbi__zbuf* a, int parse_header) -{ - int final, type; - if (parse_header) - if (!stbi__parse_zlib_header(a)) return 0; - a->num_bits = 0; - a->code_buffer = 0; - do { - final = stbi__zreceive(a, 1); - type = stbi__zreceive(a, 2); - if (type == 0) { - if (!stbi__parse_uncompressed_block(a)) return 0; - } - else if (type == 3) { - return 0; - } - else { - if (type == 1) { - // use fixed code lengths - if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length, 288)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; - } - else { - if (!stbi__compute_huffman_codes(a)) return 0; - } - if (!stbi__parse_huffman_block(a)) return 0; - } - } while (!final); - return 1; -} - -static int stbi__do_zlib(stbi__zbuf* a, char* obuf, int olen, int exp, int parse_header) -{ - a->zout_start = obuf; - a->zout = obuf; - a->zout_end = obuf + olen; - a->z_expandable = exp; - - return stbi__parse_zlib(a, parse_header); -} - -STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen) -{ - stbi__zbuf a; - char* p = (char*)stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc*)buffer; - a.zbuffer_end = (stbi_uc*)buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { - if (outlen)* outlen = (int)(a.zout - a.zout_start); - return a.zout_start; - } - else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF char* stbi_zlib_decode_malloc(char const* buffer, int len, int* outlen) -{ - return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); -} - -STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header) -{ - stbi__zbuf a; - char* p = (char*)stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc*)buffer; - a.zbuffer_end = (stbi_uc*)buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { - if (outlen)* outlen = (int)(a.zout - a.zout_start); - return a.zout_start; - } - else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, char const* ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc*)ibuffer; - a.zbuffer_end = (stbi_uc*)ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) - return (int)(a.zout - a.zout_start); - else - return -1; -} - -STBIDEF char* stbi_zlib_decode_noheader_malloc(char const* buffer, int len, int* outlen) -{ - stbi__zbuf a; - char* p = (char*)stbi__malloc(16384); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc*)buffer; - a.zbuffer_end = (stbi_uc*)buffer + len; - if (stbi__do_zlib(&a, p, 16384, 1, 0)) { - if (outlen)* outlen = (int)(a.zout - a.zout_start); - return a.zout_start; - } - else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc*)ibuffer; - a.zbuffer_end = (stbi_uc*)ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) - return (int)(a.zout - a.zout_start); - else - return -1; -} -#endif - -// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 -// simple implementation -// - only 8-bit samples -// - no CRC checking -// - allocates lots of intermediate memory -// - avoids problem of streaming data between subsystems -// - avoids explicit window management -// performance -// - uses stb_zlib, a PD zlib implementation with fast huffman decoding - -#ifndef STBI_NO_PNG -typedef struct -{ - stbi__uint32 length; - stbi__uint32 type; -} stbi__pngchunk; - -static stbi__pngchunk stbi__get_chunk_header(stbi__context* s) -{ - stbi__pngchunk c; - c.length = stbi__get32be(s); - c.type = stbi__get32be(s); - return c; -} - -static int stbi__check_png_header(stbi__context* s) -{ - static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; - int i; - for (i = 0; i < 8; ++i) - if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig", "Not a PNG"); - return 1; -} - -typedef struct -{ - stbi__context* s; - stbi_uc* idata, * expanded, * out; - int depth; -} stbi__png; - - -enum { - STBI__F_none = 0, - STBI__F_sub = 1, - STBI__F_up = 2, - STBI__F_avg = 3, - STBI__F_paeth = 4, - // synthetic filters used for first scanline to avoid needing a dummy row of 0s - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static stbi_uc first_row_filter[5] = -{ - STBI__F_none, - STBI__F_sub, - STBI__F_none, - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static int stbi__paeth(int a, int b, int c) -{ - int p = a + b - c; - int pa = abs(p - a); - int pb = abs(p - b); - int pc = abs(p - c); - if (pa <= pb && pa <= pc) return a; - if (pb <= pc) return b; - return c; -} - -static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; - -// create the png data from post-deflated data -static int stbi__create_png_image_raw(stbi__png* a, stbi_uc* raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) -{ - int bytes = (depth == 16 ? 2 : 1); - stbi__context* s = a->s; - stbi__uint32 i, j, stride = x * out_n * bytes; - stbi__uint32 img_len, img_width_bytes; - int k; - int img_n = s->img_n; // copy it into a local for later - - int output_bytes = out_n * bytes; - int filter_bytes = img_n * bytes; - int width = x; - - STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1); - a->out = (stbi_uc*)stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into - if (!a->out) return stbi__err("outofmem", "Out of memory"); - - if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); - img_width_bytes = (((img_n * x * depth) + 7) >> 3); - img_len = (img_width_bytes + 1) * y; - - // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, - // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), - // so just check for raw_len < img_len always. - if (raw_len < img_len) return stbi__err("not enough pixels", "Corrupt PNG"); - - for (j = 0; j < y; ++j) { - stbi_uc* cur = a->out + stride * j; - stbi_uc* prior; - int filter = *raw++; - - if (filter > 4) - return stbi__err("invalid filter", "Corrupt PNG"); - - if (depth < 8) { - STBI_ASSERT(img_width_bytes <= x); - cur += x * out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place - filter_bytes = 1; - width = img_width_bytes; - } - prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above - - // if first row, use special filter that doesn't sample previous row - if (j == 0) filter = first_row_filter[filter]; - - // handle first byte explicitly - for (k = 0; k < filter_bytes; ++k) { - switch (filter) { - case STBI__F_none: cur[k] = raw[k]; break; - case STBI__F_sub: cur[k] = raw[k]; break; - case STBI__F_up: cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; - case STBI__F_avg: cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1)); break; - case STBI__F_paeth: cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0)); break; - case STBI__F_avg_first: cur[k] = raw[k]; break; - case STBI__F_paeth_first: cur[k] = raw[k]; break; - } - } - - if (depth == 8) { - if (img_n != out_n) - cur[img_n] = 255; // first pixel - raw += img_n; - cur += out_n; - prior += out_n; - } - else if (depth == 16) { - if (img_n != out_n) { - cur[filter_bytes] = 255; // first pixel top byte - cur[filter_bytes + 1] = 255; // first pixel bottom byte - } - raw += filter_bytes; - cur += output_bytes; - prior += output_bytes; - } - else { - raw += 1; - cur += 1; - prior += 1; - } - - // this is a little gross, so that we don't switch per-pixel or per-component - if (depth < 8 || img_n == out_n) { - int nk = (width - 1) * filter_bytes; -#define STBI__CASE(f) \ - case f: \ - for (k=0; k < nk; ++k) - switch (filter) { - // "none" filter turns into a memcpy here; make that explicit. - case STBI__F_none: memcpy(cur, raw, nk); break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k], prior[k - filter_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)); } break; - } -#undef STBI__CASE - raw += nk; - } - else { - STBI_ASSERT(img_n + 1 == out_n); -#define STBI__CASE(f) \ - case f: \ - for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \ - for (k=0; k < filter_bytes; ++k) - switch (filter) { - STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], prior[k], prior[k - output_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)); } break; - } -#undef STBI__CASE - - // the loop above sets the high byte of the pixels' alpha, but for - // 16 bit png files we also need the low byte set. we'll do that here. - if (depth == 16) { - cur = a->out + stride * j; // start at the beginning of the row again - for (i = 0; i < x; ++i, cur += output_bytes) { - cur[filter_bytes + 1] = 255; - } - } - } - } - - // we make a separate pass to expand bits to pixels; for performance, - // this could run two scanlines behind the above code, so it won't - // intefere with filtering but will still be in the cache. - if (depth < 8) { - for (j = 0; j < y; ++j) { - stbi_uc* cur = a->out + stride * j; - stbi_uc* in = a->out + stride * j + x * out_n - img_width_bytes; - // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit - // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop - stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range - - // note that the final byte might overshoot and write more data than desired. - // we can allocate enough data that this never writes out of memory, but it - // could also overwrite the next scanline. can it overwrite non-empty data - // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. - // so we need to explicitly clamp the final ones - - if (depth == 4) { - for (k = x * img_n; k >= 2; k -= 2, ++in) { - *cur++ = scale * ((*in >> 4)); - *cur++ = scale * ((*in) & 0x0f); - } - if (k > 0)* cur++ = scale * ((*in >> 4)); - } - else if (depth == 2) { - for (k = x * img_n; k >= 4; k -= 4, ++in) { - *cur++ = scale * ((*in >> 6)); - *cur++ = scale * ((*in >> 4) & 0x03); - *cur++ = scale * ((*in >> 2) & 0x03); - *cur++ = scale * ((*in) & 0x03); - } - if (k > 0)* cur++ = scale * ((*in >> 6)); - if (k > 1)* cur++ = scale * ((*in >> 4) & 0x03); - if (k > 2)* cur++ = scale * ((*in >> 2) & 0x03); - } - else if (depth == 1) { - for (k = x * img_n; k >= 8; k -= 8, ++in) { - *cur++ = scale * ((*in >> 7)); - *cur++ = scale * ((*in >> 6) & 0x01); - *cur++ = scale * ((*in >> 5) & 0x01); - *cur++ = scale * ((*in >> 4) & 0x01); - *cur++ = scale * ((*in >> 3) & 0x01); - *cur++ = scale * ((*in >> 2) & 0x01); - *cur++ = scale * ((*in >> 1) & 0x01); - *cur++ = scale * ((*in) & 0x01); - } - if (k > 0)* cur++ = scale * ((*in >> 7)); - if (k > 1)* cur++ = scale * ((*in >> 6) & 0x01); - if (k > 2)* cur++ = scale * ((*in >> 5) & 0x01); - if (k > 3)* cur++ = scale * ((*in >> 4) & 0x01); - if (k > 4)* cur++ = scale * ((*in >> 3) & 0x01); - if (k > 5)* cur++ = scale * ((*in >> 2) & 0x01); - if (k > 6)* cur++ = scale * ((*in >> 1) & 0x01); - } - if (img_n != out_n) { - int q; - // insert alpha = 255 - cur = a->out + stride * j; - if (img_n == 1) { - for (q = x - 1; q >= 0; --q) { - cur[q * 2 + 1] = 255; - cur[q * 2 + 0] = cur[q]; - } - } - else { - STBI_ASSERT(img_n == 3); - for (q = x - 1; q >= 0; --q) { - cur[q * 4 + 3] = 255; - cur[q * 4 + 2] = cur[q * 3 + 2]; - cur[q * 4 + 1] = cur[q * 3 + 1]; - cur[q * 4 + 0] = cur[q * 3 + 0]; - } - } - } - } - } - else if (depth == 16) { - // force the image data from big-endian to platform-native. - // this is done in a separate pass due to the decoding relying - // on the data being untouched, but could probably be done - // per-line during decode if care is taken. - stbi_uc* cur = a->out; - stbi__uint16* cur16 = (stbi__uint16*)cur; - - for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) { - *cur16 = (cur[0] << 8) | cur[1]; - } - } - - return 1; -} - -static int stbi__create_png_image(stbi__png* a, stbi_uc* image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) -{ - int bytes = (depth == 16 ? 2 : 1); - int out_bytes = out_n * bytes; - stbi_uc* final; - int p; - if (!interlaced) - return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); - - // de-interlacing - final = (stbi_uc*)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); - for (p = 0; p < 7; ++p) { - int xorig[] = { 0,4,0,2,0,1,0 }; - int yorig[] = { 0,0,4,0,2,0,1 }; - int xspc[] = { 8,8,4,4,2,2,1 }; - int yspc[] = { 8,8,8,4,4,2,2 }; - int i, j, x, y; - // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 - x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p]; - y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p]; - if (x && y) { - stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; - if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { - STBI_FREE(final); - return 0; - } - for (j = 0; j < y; ++j) { - for (i = 0; i < x; ++i) { - int out_y = j * yspc[p] + yorig[p]; - int out_x = i * xspc[p] + xorig[p]; - memcpy(final + out_y * a->s->img_x * out_bytes + out_x * out_bytes, - a->out + (j * x + i) * out_bytes, out_bytes); - } - } - STBI_FREE(a->out); - image_data += img_len; - image_data_len -= img_len; - } - } - a->out = final; - - return 1; -} - -static int stbi__compute_transparency(stbi__png* z, stbi_uc tc[3], int out_n) -{ - stbi__context* s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc* p = z->out; - - // compute color-based transparency, assuming we've - // already got 255 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i = 0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 255); - p += 2; - } - } - else { - for (i = 0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__compute_transparency16(stbi__png* z, stbi__uint16 tc[3], int out_n) -{ - stbi__context* s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi__uint16* p = (stbi__uint16*)z->out; - - // compute color-based transparency, assuming we've - // already got 65535 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i = 0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 65535); - p += 2; - } - } - else { - for (i = 0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__expand_png_palette(stbi__png* a, stbi_uc* palette, int len, int pal_img_n) -{ - stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; - stbi_uc* p, * temp_out, * orig = a->out; - - p = (stbi_uc*)stbi__malloc_mad2(pixel_count, pal_img_n, 0); - if (p == NULL) return stbi__err("outofmem", "Out of memory"); - - // between here and free(out) below, exitting would leak - temp_out = p; - - if (pal_img_n == 3) { - for (i = 0; i < pixel_count; ++i) { - int n = orig[i] * 4; - p[0] = palette[n]; - p[1] = palette[n + 1]; - p[2] = palette[n + 2]; - p += 3; - } - } - else { - for (i = 0; i < pixel_count; ++i) { - int n = orig[i] * 4; - p[0] = palette[n]; - p[1] = palette[n + 1]; - p[2] = palette[n + 2]; - p[3] = palette[n + 3]; - p += 4; - } - } - STBI_FREE(a->out); - a->out = temp_out; - - STBI_NOTUSED(len); - - return 1; -} - -static int stbi__unpremultiply_on_load = 0; -static int stbi__de_iphone_flag = 0; - -STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) -{ - stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; -} - -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) -{ - stbi__de_iphone_flag = flag_true_if_should_convert; -} - -static void stbi__de_iphone(stbi__png* z) -{ - stbi__context* s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc* p = z->out; - - if (s->img_out_n == 3) { // convert bgr to rgb - for (i = 0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 3; - } - } - else { - STBI_ASSERT(s->img_out_n == 4); - if (stbi__unpremultiply_on_load) { - // convert bgr to rgb and unpremultiply - for (i = 0; i < pixel_count; ++i) { - stbi_uc a = p[3]; - stbi_uc t = p[0]; - if (a) { - stbi_uc half = a / 2; - p[0] = (p[2] * 255 + half) / a; - p[1] = (p[1] * 255 + half) / a; - p[2] = (t * 255 + half) / a; - } - else { - p[0] = p[2]; - p[2] = t; - } - p += 4; - } - } - else { - // convert bgr to rgb - for (i = 0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 4; - } - } - } -} - -#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) - -static int stbi__parse_png_file(stbi__png* z, int scan, int req_comp) -{ - stbi_uc palette[1024], pal_img_n = 0; - stbi_uc has_trans = 0, tc[3]; - stbi__uint16 tc16[3]; - stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0; - int first = 1, k, interlace = 0, color = 0, is_iphone = 0; - stbi__context* s = z->s; - - z->expanded = NULL; - z->idata = NULL; - z->out = NULL; - - if (!stbi__check_png_header(s)) return 0; - - if (scan == STBI__SCAN_type) return 1; - - for (;;) { - stbi__pngchunk c = stbi__get_chunk_header(s); - switch (c.type) { - case STBI__PNG_TYPE('C', 'g', 'B', 'I'): - is_iphone = 1; - stbi__skip(s, c.length); - break; - case STBI__PNG_TYPE('I', 'H', 'D', 'R'): { - int comp, filter; - if (!first) return stbi__err("multiple IHDR", "Corrupt PNG"); - first = 0; - if (c.length != 13) return stbi__err("bad IHDR len", "Corrupt PNG"); - s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large", "Very large image (corrupt?)"); - s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large", "Very large image (corrupt?)"); - z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only", "PNG not supported: 1/2/4/8/16-bit only"); - color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype", "Corrupt PNG"); - if (color == 3 && z->depth == 16) return stbi__err("bad ctype", "Corrupt PNG"); - if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype", "Corrupt PNG"); - comp = stbi__get8(s); if (comp) return stbi__err("bad comp method", "Corrupt PNG"); - filter = stbi__get8(s); if (filter) return stbi__err("bad filter method", "Corrupt PNG"); - interlace = stbi__get8(s); if (interlace > 1) return stbi__err("bad interlace method", "Corrupt PNG"); - if (!s->img_x || !s->img_y) return stbi__err("0-pixel image", "Corrupt PNG"); - if (!pal_img_n) { - s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); - if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); - if (scan == STBI__SCAN_header) return 1; - } - else { - // if paletted, then pal_n is our final components, and - // img_n is # components to decompress/filter. - s->img_n = 1; - if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large", "Corrupt PNG"); - // if SCAN_header, have to scan to see if we have a tRNS - } - break; - } - - case STBI__PNG_TYPE('P', 'L', 'T', 'E'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (c.length > 256 * 3) return stbi__err("invalid PLTE", "Corrupt PNG"); - pal_len = c.length / 3; - if (pal_len * 3 != c.length) return stbi__err("invalid PLTE", "Corrupt PNG"); - for (i = 0; i < pal_len; ++i) { - palette[i * 4 + 0] = stbi__get8(s); - palette[i * 4 + 1] = stbi__get8(s); - palette[i * 4 + 2] = stbi__get8(s); - palette[i * 4 + 3] = 255; - } - break; - } - - case STBI__PNG_TYPE('t', 'R', 'N', 'S'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (z->idata) return stbi__err("tRNS after IDAT", "Corrupt PNG"); - if (pal_img_n) { - if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } - if (pal_len == 0) return stbi__err("tRNS before PLTE", "Corrupt PNG"); - if (c.length > pal_len) return stbi__err("bad tRNS len", "Corrupt PNG"); - pal_img_n = 4; - for (i = 0; i < c.length; ++i) - palette[i * 4 + 3] = stbi__get8(s); - } - else { - if (!(s->img_n & 1)) return stbi__err("tRNS with alpha", "Corrupt PNG"); - if (c.length != (stbi__uint32)s->img_n * 2) return stbi__err("bad tRNS len", "Corrupt PNG"); - has_trans = 1; - if (z->depth == 16) { - for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is - } - else { - for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger - } - } - break; - } - - case STBI__PNG_TYPE('I', 'D', 'A', 'T'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (pal_img_n && !pal_len) return stbi__err("no PLTE", "Corrupt PNG"); - if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } - if ((int)(ioff + c.length) < (int)ioff) return 0; - if (ioff + c.length > idata_limit) { - stbi__uint32 idata_limit_old = idata_limit; - stbi_uc* p; - if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; - while (ioff + c.length > idata_limit) - idata_limit *= 2; - STBI_NOTUSED(idata_limit_old); - p = (stbi_uc*)STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); - z->idata = p; - } - if (!stbi__getn(s, z->idata + ioff, c.length)) return stbi__err("outofdata", "Corrupt PNG"); - ioff += c.length; - break; - } - - case STBI__PNG_TYPE('I', 'E', 'N', 'D'): { - stbi__uint32 raw_len, bpl; - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (scan != STBI__SCAN_load) return 1; - if (z->idata == NULL) return stbi__err("no IDAT", "Corrupt PNG"); - // initial guess for decoded data size to avoid unnecessary reallocs - bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component - raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; - z->expanded = (stbi_uc*)stbi_zlib_decode_malloc_guesssize_headerflag((char*)z->idata, ioff, raw_len, (int*)& raw_len, !is_iphone); - if (z->expanded == NULL) return 0; // zlib should set error - STBI_FREE(z->idata); z->idata = NULL; - if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) || has_trans) - s->img_out_n = s->img_n + 1; - else - s->img_out_n = s->img_n; - if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; - if (has_trans) { - if (z->depth == 16) { - if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; - } - else { - if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; - } - } - if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) - stbi__de_iphone(z); - if (pal_img_n) { - // pal_img_n == 3 or 4 - s->img_n = pal_img_n; // record the actual colors we had - s->img_out_n = pal_img_n; - if (req_comp >= 3) s->img_out_n = req_comp; - if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) - return 0; - } - else if (has_trans) { - // non-paletted image with tRNS -> source image has (constant) alpha - ++s->img_n; - } - STBI_FREE(z->expanded); z->expanded = NULL; - return 1; - } - - default: - // if critical, fail - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if ((c.type & (1 << 29)) == 0) { -#ifndef STBI_NO_FAILURE_STRINGS - // not threadsafe - static char invalid_chunk[] = "XXXX PNG chunk not known"; - invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); - invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); - invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); - invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); -#endif - return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); - } - stbi__skip(s, c.length); - break; - } - // end of PNG chunk, read and skip CRC - stbi__get32be(s); - } -} - -static void* stbi__do_png(stbi__png* p, int* x, int* y, int* n, int req_comp, stbi__result_info* ri) -{ - void* result = NULL; - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { - if (p->depth < 8) - ri->bits_per_channel = 8; - else - ri->bits_per_channel = p->depth; - result = p->out; - p->out = NULL; - if (req_comp && req_comp != p->s->img_out_n) { - if (ri->bits_per_channel == 8) - result = stbi__convert_format((unsigned char*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - else - result = stbi__convert_format16((stbi__uint16*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - p->s->img_out_n = req_comp; - if (result == NULL) return result; - } - *x = p->s->img_x; - *y = p->s->img_y; - if (n)* n = p->s->img_n; - } - STBI_FREE(p->out); p->out = NULL; - STBI_FREE(p->expanded); p->expanded = NULL; - STBI_FREE(p->idata); p->idata = NULL; - - return result; -} - -static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi__png p; - p.s = s; - return stbi__do_png(&p, x, y, comp, req_comp, ri); -} - -static int stbi__png_test(stbi__context* s) -{ - int r; - r = stbi__check_png_header(s); - stbi__rewind(s); - return r; -} - -static int stbi__png_info_raw(stbi__png* p, int* x, int* y, int* comp) -{ - if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { - stbi__rewind(p->s); - return 0; - } - if (x)* x = p->s->img_x; - if (y)* y = p->s->img_y; - if (comp)* comp = p->s->img_n; - return 1; -} - -static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp) -{ - stbi__png p; - p.s = s; - return stbi__png_info_raw(&p, x, y, comp); -} - -static int stbi__png_is16(stbi__context* s) -{ - stbi__png p; - p.s = s; - if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) - return 0; - if (p.depth != 16) { - stbi__rewind(p.s); - return 0; - } - return 1; -} -#endif - -// Microsoft/Windows BMP image - -#ifndef STBI_NO_BMP -static int stbi__bmp_test_raw(stbi__context* s) -{ - int r; - int sz; - if (stbi__get8(s) != 'B') return 0; - if (stbi__get8(s) != 'M') return 0; - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - stbi__get32le(s); // discard data offset - sz = stbi__get32le(s); - r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); - return r; -} - -static int stbi__bmp_test(stbi__context* s) -{ - int r = stbi__bmp_test_raw(s); - stbi__rewind(s); - return r; -} - - -// returns 0..31 for the highest set bit -static int stbi__high_bit(unsigned int z) -{ - int n = 0; - if (z == 0) return -1; - if (z >= 0x10000) n += 16, z >>= 16; - if (z >= 0x00100) n += 8, z >>= 8; - if (z >= 0x00010) n += 4, z >>= 4; - if (z >= 0x00004) n += 2, z >>= 2; - if (z >= 0x00002) n += 1, z >>= 1; - return n; -} - -static int stbi__bitcount(unsigned int a) -{ - a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 - a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 - a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits - a = (a + (a >> 8)); // max 16 per 8 bits - a = (a + (a >> 16)); // max 32 per 8 bits - return a & 0xff; -} - -// extract an arbitrarily-aligned N-bit value (N=bits) -// from v, and then make it 8-bits long and fractionally -// extend it to full full range. -static int stbi__shiftsigned(int v, int shift, int bits) -{ - static unsigned int mul_table[9] = { - 0, - 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, - 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, - }; - static unsigned int shift_table[9] = { - 0, 0,0,1,0,2,4,6,0, - }; - if (shift < 0) - v <<= -shift; - else - v >>= shift; - STBI_ASSERT(v >= 0 && v < 256); - v >>= (8 - bits); - STBI_ASSERT(bits >= 0 && bits <= 8); - return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits]; -} - -typedef struct -{ - int bpp, offset, hsz; - unsigned int mr, mg, mb, ma, all_a; -} stbi__bmp_data; - -static void* stbi__bmp_parse_header(stbi__context* s, stbi__bmp_data* info) -{ - int hsz; - if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - info->offset = stbi__get32le(s); - info->hsz = hsz = stbi__get32le(s); - info->mr = info->mg = info->mb = info->ma = 0; - - if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); - if (hsz == 12) { - s->img_x = stbi__get16le(s); - s->img_y = stbi__get16le(s); - } - else { - s->img_x = stbi__get32le(s); - s->img_y = stbi__get32le(s); - } - if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); - info->bpp = stbi__get16le(s); - if (hsz != 12) { - int compress = stbi__get32le(s); - if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); - stbi__get32le(s); // discard sizeof - stbi__get32le(s); // discard hres - stbi__get32le(s); // discard vres - stbi__get32le(s); // discard colorsused - stbi__get32le(s); // discard max important - if (hsz == 40 || hsz == 56) { - if (hsz == 56) { - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - } - if (info->bpp == 16 || info->bpp == 32) { - if (compress == 0) { - if (info->bpp == 32) { - info->mr = 0xffu << 16; - info->mg = 0xffu << 8; - info->mb = 0xffu << 0; - info->ma = 0xffu << 24; - info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 - } - else { - info->mr = 31u << 10; - info->mg = 31u << 5; - info->mb = 31u << 0; - } - } - else if (compress == 3) { - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - // not documented, but generated by photoshop and handled by mspaint - if (info->mr == info->mg && info->mg == info->mb) { - // ?!?!? - return stbi__errpuc("bad BMP", "bad BMP"); - } - } - else - return stbi__errpuc("bad BMP", "bad BMP"); - } - } - else { - int i; - if (hsz != 108 && hsz != 124) - return stbi__errpuc("bad BMP", "bad BMP"); - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - info->ma = stbi__get32le(s); - stbi__get32le(s); // discard color space - for (i = 0; i < 12; ++i) - stbi__get32le(s); // discard color space parameters - if (hsz == 124) { - stbi__get32le(s); // discard rendering intent - stbi__get32le(s); // discard offset of profile data - stbi__get32le(s); // discard size of profile data - stbi__get32le(s); // discard reserved - } - } - } - return (void*)1; -} - - -static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* out; - unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a; - stbi_uc pal[256][4]; - int psize = 0, i, j, width; - int flip_vertically, pad, target; - stbi__bmp_data info; - STBI_NOTUSED(ri); - - info.all_a = 255; - if (stbi__bmp_parse_header(s, &info) == NULL) - return NULL; // error code already set - - flip_vertically = ((int)s->img_y) > 0; - s->img_y = abs((int)s->img_y); - - mr = info.mr; - mg = info.mg; - mb = info.mb; - ma = info.ma; - all_a = info.all_a; - - if (info.hsz == 12) { - if (info.bpp < 24) - psize = (info.offset - 14 - 24) / 3; - } - else { - if (info.bpp < 16) - psize = (info.offset - 14 - info.hsz) >> 2; - } - - s->img_n = ma ? 4 : 3; - if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 - target = req_comp; - else - target = s->img_n; // if they want monochrome, we'll post-convert - - // sanity-check size - if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "Corrupt BMP"); - - out = (stbi_uc*)stbi__malloc_mad3(target, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - if (info.bpp < 16) { - int z = 0; - if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } - for (i = 0; i < psize; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - if (info.hsz != 12) stbi__get8(s); - pal[i][3] = 255; - } - stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); - if (info.bpp == 1) width = (s->img_x + 7) >> 3; - else if (info.bpp == 4) width = (s->img_x + 1) >> 1; - else if (info.bpp == 8) width = s->img_x; - else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } - pad = (-width) & 3; - if (info.bpp == 1) { - for (j = 0; j < (int)s->img_y; ++j) { - int bit_offset = 7, v = stbi__get8(s); - for (i = 0; i < (int)s->img_x; ++i) { - int color = (v >> bit_offset) & 0x1; - out[z++] = pal[color][0]; - out[z++] = pal[color][1]; - out[z++] = pal[color][2]; - if ((--bit_offset) < 0) { - bit_offset = 7; - v = stbi__get8(s); - } - } - stbi__skip(s, pad); - } - } - else { - for (j = 0; j < (int)s->img_y; ++j) { - for (i = 0; i < (int)s->img_x; i += 2) { - int v = stbi__get8(s), v2 = 0; - if (info.bpp == 4) { - v2 = v & 15; - v >>= 4; - } - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - if (i + 1 == (int)s->img_x) break; - v = (info.bpp == 8) ? stbi__get8(s) : v2; - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - } - stbi__skip(s, pad); - } - } - } - else { - int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0, gcount = 0, bcount = 0, acount = 0; - int z = 0; - int easy = 0; - stbi__skip(s, info.offset - 14 - info.hsz); - if (info.bpp == 24) width = 3 * s->img_x; - else if (info.bpp == 16) width = 2 * s->img_x; - else /* bpp = 32 and pad = 0 */ width = 0; - pad = (-width) & 3; - if (info.bpp == 24) { - easy = 1; - } - else if (info.bpp == 32) { - if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) - easy = 2; - } - if (!easy) { - if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } - // right shift amt to put high bit in position #7 - rshift = stbi__high_bit(mr) - 7; rcount = stbi__bitcount(mr); - gshift = stbi__high_bit(mg) - 7; gcount = stbi__bitcount(mg); - bshift = stbi__high_bit(mb) - 7; bcount = stbi__bitcount(mb); - ashift = stbi__high_bit(ma) - 7; acount = stbi__bitcount(ma); - } - for (j = 0; j < (int)s->img_y; ++j) { - if (easy) { - for (i = 0; i < (int)s->img_x; ++i) { - unsigned char a; - out[z + 2] = stbi__get8(s); - out[z + 1] = stbi__get8(s); - out[z + 0] = stbi__get8(s); - z += 3; - a = (easy == 2 ? stbi__get8(s) : 255); - all_a |= a; - if (target == 4) out[z++] = a; - } - } - else { - int bpp = info.bpp; - for (i = 0; i < (int)s->img_x; ++i) { - stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s) : stbi__get32le(s)); - unsigned int a; - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); - a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); - all_a |= a; - if (target == 4) out[z++] = STBI__BYTECAST(a); - } - } - stbi__skip(s, pad); - } - } - - // if alpha channel is all 0s, replace with all 255s - if (target == 4 && all_a == 0) - for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4) - out[i] = 255; - - if (flip_vertically) { - stbi_uc t; - for (j = 0; j < (int)s->img_y >> 1; ++j) { - stbi_uc* p1 = out + j * s->img_x * target; - stbi_uc* p2 = out + (s->img_y - 1 - j) * s->img_x * target; - for (i = 0; i < (int)s->img_x * target; ++i) { - t = p1[i], p1[i] = p2[i], p2[i] = t; - } - } - } - - if (req_comp && req_comp != target) { - out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - *x = s->img_x; - *y = s->img_y; - if (comp)* comp = s->img_n; - return out; -} -#endif - -// Targa Truevision - TGA -// by Jonathan Dummer -#ifndef STBI_NO_TGA -// returns STBI_rgb or whatever, 0 on error -static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) -{ - // only RGB or RGBA (incl. 16bit) or grey allowed - if (is_rgb16)* is_rgb16 = 0; - switch (bits_per_pixel) { - case 8: return STBI_grey; - case 16: if (is_grey) return STBI_grey_alpha; - // fallthrough - case 15: if (is_rgb16) * is_rgb16 = 1; - return STBI_rgb; - case 24: // fallthrough - case 32: return bits_per_pixel / 8; - default: return 0; - } -} - -static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp) -{ - int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; - int sz, tga_colormap_type; - stbi__get8(s); // discard Offset - tga_colormap_type = stbi__get8(s); // colormap type - if (tga_colormap_type > 1) { - stbi__rewind(s); - return 0; // only RGB or indexed allowed - } - tga_image_type = stbi__get8(s); // image type - if (tga_colormap_type == 1) { // colormapped (paletted) image - if (tga_image_type != 1 && tga_image_type != 9) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 4); // skip image x and y origin - tga_colormap_bpp = sz; - } - else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE - if ((tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11)) { - stbi__rewind(s); - return 0; // only RGB or grey allowed, +/- RLE - } - stbi__skip(s, 9); // skip colormap specification and image x/y origin - tga_colormap_bpp = 0; - } - tga_w = stbi__get16le(s); - if (tga_w < 1) { - stbi__rewind(s); - return 0; // test width - } - tga_h = stbi__get16le(s); - if (tga_h < 1) { - stbi__rewind(s); - return 0; // test height - } - tga_bits_per_pixel = stbi__get8(s); // bits per pixel - stbi__get8(s); // ignore alpha bits - if (tga_colormap_bpp != 0) { - if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { - // when using a colormap, tga_bits_per_pixel is the size of the indexes - // I don't think anything but 8 or 16bit indexes makes sense - stbi__rewind(s); - return 0; - } - tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); - } - else { - tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); - } - if (!tga_comp) { - stbi__rewind(s); - return 0; - } - if (x)* x = tga_w; - if (y)* y = tga_h; - if (comp)* comp = tga_comp; - return 1; // seems to have passed everything -} - -static int stbi__tga_test(stbi__context* s) -{ - int res = 0; - int sz, tga_color_type; - stbi__get8(s); // discard Offset - tga_color_type = stbi__get8(s); // color type - if (tga_color_type > 1) goto errorEnd; // only RGB or indexed allowed - sz = stbi__get8(s); // image type - if (tga_color_type == 1) { // colormapped (paletted) image - if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 - stbi__skip(s, 4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) goto errorEnd; - stbi__skip(s, 4); // skip image x and y origin - } - else { // "normal" image w/o colormap - if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11)) goto errorEnd; // only RGB or grey allowed, +/- RLE - stbi__skip(s, 9); // skip colormap specification and image x/y origin - } - if (stbi__get16le(s) < 1) goto errorEnd; // test width - if (stbi__get16le(s) < 1) goto errorEnd; // test height - sz = stbi__get8(s); // bits per pixel - if ((tga_color_type == 1) && (sz != 8) && (sz != 16)) goto errorEnd; // for colormapped images, bpp is size of an index - if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) goto errorEnd; - - res = 1; // if we got this far, everything's good and we can return 1 instead of 0 - -errorEnd: - stbi__rewind(s); - return res; -} - -// read 16bit value and convert to 24bit RGB -static void stbi__tga_read_rgb16(stbi__context* s, stbi_uc* out) -{ - stbi__uint16 px = (stbi__uint16)stbi__get16le(s); - stbi__uint16 fiveBitMask = 31; - // we have 3 channels with 5bits each - int r = (px >> 10) & fiveBitMask; - int g = (px >> 5) & fiveBitMask; - int b = px & fiveBitMask; - // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later - out[0] = (stbi_uc)((r * 255) / 31); - out[1] = (stbi_uc)((g * 255) / 31); - out[2] = (stbi_uc)((b * 255) / 31); - - // some people claim that the most significant bit might be used for alpha - // (possibly if an alpha-bit is set in the "image descriptor byte") - // but that only made 16bit test images completely translucent.. - // so let's treat all 15 and 16bit TGAs as RGB with no alpha. -} - -static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - // read in the TGA header stuff - int tga_offset = stbi__get8(s); - int tga_indexed = stbi__get8(s); - int tga_image_type = stbi__get8(s); - int tga_is_RLE = 0; - int tga_palette_start = stbi__get16le(s); - int tga_palette_len = stbi__get16le(s); - int tga_palette_bits = stbi__get8(s); - int tga_x_origin = stbi__get16le(s); - int tga_y_origin = stbi__get16le(s); - int tga_width = stbi__get16le(s); - int tga_height = stbi__get16le(s); - int tga_bits_per_pixel = stbi__get8(s); - int tga_comp, tga_rgb16 = 0; - int tga_inverted = stbi__get8(s); - // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) - // image data - unsigned char* tga_data; - unsigned char* tga_palette = NULL; - int i, j; - unsigned char raw_data[4] = { 0 }; - int RLE_count = 0; - int RLE_repeating = 0; - int read_next_pixel = 1; - STBI_NOTUSED(ri); - - // do a tiny bit of precessing - if (tga_image_type >= 8) - { - tga_image_type -= 8; - tga_is_RLE = 1; - } - tga_inverted = 1 - ((tga_inverted >> 5) & 1); - - // If I'm paletted, then I'll use the number of bits from the palette - if (tga_indexed) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); - else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); - - if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency - return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); - - // tga info - *x = tga_width; - *y = tga_height; - if (comp)* comp = tga_comp; - - if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) - return stbi__errpuc("too large", "Corrupt TGA"); - - tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); - if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); - - // skip to the data's starting position (offset usually = 0) - stbi__skip(s, tga_offset); - - if (!tga_indexed && !tga_is_RLE && !tga_rgb16) { - for (i = 0; i < tga_height; ++i) { - int row = tga_inverted ? tga_height - i - 1 : i; - stbi_uc* tga_row = tga_data + row * tga_width * tga_comp; - stbi__getn(s, tga_row, tga_width * tga_comp); - } - } - else { - // do I need to load a palette? - if (tga_indexed) - { - // any data to skip? (offset usually = 0) - stbi__skip(s, tga_palette_start); - // load the palette - tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); - if (!tga_palette) { - STBI_FREE(tga_data); - return stbi__errpuc("outofmem", "Out of memory"); - } - if (tga_rgb16) { - stbi_uc* pal_entry = tga_palette; - STBI_ASSERT(tga_comp == STBI_rgb); - for (i = 0; i < tga_palette_len; ++i) { - stbi__tga_read_rgb16(s, pal_entry); - pal_entry += tga_comp; - } - } - else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { - STBI_FREE(tga_data); - STBI_FREE(tga_palette); - return stbi__errpuc("bad palette", "Corrupt TGA"); - } - } - // load the data - for (i = 0; i < tga_width * tga_height; ++i) - { - // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? - if (tga_is_RLE) - { - if (RLE_count == 0) - { - // yep, get the next byte as a RLE command - int RLE_cmd = stbi__get8(s); - RLE_count = 1 + (RLE_cmd & 127); - RLE_repeating = RLE_cmd >> 7; - read_next_pixel = 1; - } - else if (!RLE_repeating) - { - read_next_pixel = 1; - } - } - else - { - read_next_pixel = 1; - } - // OK, if I need to read a pixel, do it now - if (read_next_pixel) - { - // load however much data we did have - if (tga_indexed) - { - // read in index, then perform the lookup - int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); - if (pal_idx >= tga_palette_len) { - // invalid index - pal_idx = 0; - } - pal_idx *= tga_comp; - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = tga_palette[pal_idx + j]; - } - } - else if (tga_rgb16) { - STBI_ASSERT(tga_comp == STBI_rgb); - stbi__tga_read_rgb16(s, raw_data); - } - else { - // read in the data raw - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = stbi__get8(s); - } - } - // clear the reading flag for the next pixel - read_next_pixel = 0; - } // end of reading a pixel - - // copy data - for (j = 0; j < tga_comp; ++j) - tga_data[i * tga_comp + j] = raw_data[j]; - - // in case we're in RLE mode, keep counting down - --RLE_count; - } - // do I need to invert the image? - if (tga_inverted) - { - for (j = 0; j * 2 < tga_height; ++j) - { - int index1 = j * tga_width * tga_comp; - int index2 = (tga_height - 1 - j) * tga_width * tga_comp; - for (i = tga_width * tga_comp; i > 0; --i) - { - unsigned char temp = tga_data[index1]; - tga_data[index1] = tga_data[index2]; - tga_data[index2] = temp; - ++index1; - ++index2; - } - } - } - // clear my palette, if I had one - if (tga_palette != NULL) - { - STBI_FREE(tga_palette); - } - } - - // swap RGB - if the source data was RGB16, it already is in the right order - if (tga_comp >= 3 && !tga_rgb16) - { - unsigned char* tga_pixel = tga_data; - for (i = 0; i < tga_width * tga_height; ++i) - { - unsigned char temp = tga_pixel[0]; - tga_pixel[0] = tga_pixel[2]; - tga_pixel[2] = temp; - tga_pixel += tga_comp; - } - } - - // convert to target component count - if (req_comp && req_comp != tga_comp) - tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); - - // the things I do to get rid of an error message, and yet keep - // Microsoft's C compilers happy... [8^( - tga_palette_start = tga_palette_len = tga_palette_bits = - tga_x_origin = tga_y_origin = 0; - // OK, done - return tga_data; -} -#endif - -// ************************************************************************************************* -// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context* s) -{ - int r = (stbi__get32be(s) == 0x38425053); - stbi__rewind(s); - return r; -} - -static int stbi__psd_decode_rle(stbi__context* s, stbi_uc* p, int pixelCount) -{ - int count, nleft, len; - - count = 0; - while ((nleft = pixelCount - count) > 0) { - len = stbi__get8(s); - if (len == 128) { - // No-op. - } - else if (len < 128) { - // Copy next len+1 bytes literally. - len++; - if (len > nleft) return 0; // corrupt data - count += len; - while (len) { - *p = stbi__get8(s); - p += 4; - len--; - } - } - else if (len > 128) { - stbi_uc val; - // Next -len+1 bytes in the dest are replicated from next source byte. - // (Interpret len as a negative 8-bit int.) - len = 257 - len; - if (len > nleft) return 0; // corrupt data - val = stbi__get8(s); - count += len; - while (len) { - *p = val; - p += 4; - len--; - } - } - } - - return 1; -} - -static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) -{ - int pixelCount; - int channelCount, compression; - int channel, i; - int bitdepth; - int w, h; - stbi_uc* out; - STBI_NOTUSED(ri); - - // Check identifier - if (stbi__get32be(s) != 0x38425053) // "8BPS" - return stbi__errpuc("not PSD", "Corrupt PSD image"); - - // Check file type version. - if (stbi__get16be(s) != 1) - return stbi__errpuc("wrong version", "Unsupported version of PSD image"); - - // Skip 6 reserved bytes. - stbi__skip(s, 6); - - // Read the number of channels (R, G, B, A, etc). - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) - return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); - - // Read the rows and columns of the image. - h = stbi__get32be(s); - w = stbi__get32be(s); - - // Make sure the depth is 8 bits. - bitdepth = stbi__get16be(s); - if (bitdepth != 8 && bitdepth != 16) - return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); - - // Make sure the color mode is RGB. - // Valid options are: - // 0: Bitmap - // 1: Grayscale - // 2: Indexed color - // 3: RGB color - // 4: CMYK color - // 7: Multichannel - // 8: Duotone - // 9: Lab color - if (stbi__get16be(s) != 3) - return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); - - // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) - stbi__skip(s, stbi__get32be(s)); - - // Skip the image resources. (resolution, pen tool paths, etc) - stbi__skip(s, stbi__get32be(s)); - - // Skip the reserved data. - stbi__skip(s, stbi__get32be(s)); - - // Find out if the data is compressed. - // Known values: - // 0: no compression - // 1: RLE compressed - compression = stbi__get16be(s); - if (compression > 1) - return stbi__errpuc("bad compression", "PSD has an unknown compression format"); - - // Check size - if (!stbi__mad3sizes_valid(4, w, h, 0)) - return stbi__errpuc("too large", "Corrupt PSD"); - - // Create the destination image. - - if (!compression && bitdepth == 16 && bpc == 16) { - out = (stbi_uc*)stbi__malloc_mad3(8, w, h, 0); - ri->bits_per_channel = 16; - } - else - out = (stbi_uc*)stbi__malloc(4 * w * h); - - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - pixelCount = w * h; - - // Initialize the data to zero. - //memset( out, 0, pixelCount * 4 ); - - // Finally, the image data. - if (compression) { - // RLE as used by .PSD and .TIFF - // Loop until you get the number of unpacked bytes you are expecting: - // Read the next source byte into n. - // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. - // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. - // Else if n is 128, noop. - // Endloop - - // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data, - // which we're going to just skip. - stbi__skip(s, h * channelCount * 2); - - // Read the RLE data by channel. - for (channel = 0; channel < 4; channel++) { - stbi_uc* p; - - p = out + channel; - if (channel >= channelCount) { - // Fill this channel with default data. - for (i = 0; i < pixelCount; i++, p += 4) - * p = (channel == 3 ? 255 : 0); - } - else { - // Read the RLE data. - if (!stbi__psd_decode_rle(s, p, pixelCount)) { - STBI_FREE(out); - return stbi__errpuc("corrupt", "bad RLE data"); - } - } - } - - } - else { - // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) - // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. - - // Read the data by channel. - for (channel = 0; channel < 4; channel++) { - if (channel >= channelCount) { - // Fill this channel with default data. - if (bitdepth == 16 && bpc == 16) { - stbi__uint16* q = ((stbi__uint16*)out) + channel; - stbi__uint16 val = channel == 3 ? 65535 : 0; - for (i = 0; i < pixelCount; i++, q += 4) - * q = val; - } - else { - stbi_uc* p = out + channel; - stbi_uc val = channel == 3 ? 255 : 0; - for (i = 0; i < pixelCount; i++, p += 4) - * p = val; - } - } - else { - if (ri->bits_per_channel == 16) { // output bpc - stbi__uint16* q = ((stbi__uint16*)out) + channel; - for (i = 0; i < pixelCount; i++, q += 4) - * q = (stbi__uint16)stbi__get16be(s); - } - else { - stbi_uc* p = out + channel; - if (bitdepth == 16) { // input bpc - for (i = 0; i < pixelCount; i++, p += 4) - * p = (stbi_uc)(stbi__get16be(s) >> 8); - } - else { - for (i = 0; i < pixelCount; i++, p += 4) - * p = stbi__get8(s); - } - } - } - } - } - - // remove weird white matte from PSD - if (channelCount >= 4) { - if (ri->bits_per_channel == 16) { - for (i = 0; i < w * h; ++i) { - stbi__uint16* pixel = (stbi__uint16*)out + 4 * i; - if (pixel[3] != 0 && pixel[3] != 65535) { - float a = pixel[3] / 65535.0f; - float ra = 1.0f / a; - float inv_a = 65535.0f * (1 - ra); - pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a); - pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a); - pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a); - } - } - } - else { - for (i = 0; i < w * h; ++i) { - unsigned char* pixel = out + 4 * i; - if (pixel[3] != 0 && pixel[3] != 255) { - float a = pixel[3] / 255.0f; - float ra = 1.0f / a; - float inv_a = 255.0f * (1 - ra); - pixel[0] = (unsigned char)(pixel[0] * ra + inv_a); - pixel[1] = (unsigned char)(pixel[1] * ra + inv_a); - pixel[2] = (unsigned char)(pixel[2] * ra + inv_a); - } - } - } - } - - // convert to desired output format - if (req_comp && req_comp != 4) { - if (ri->bits_per_channel == 16) - out = (stbi_uc*)stbi__convert_format16((stbi__uint16*)out, 4, req_comp, w, h); - else - out = stbi__convert_format(out, 4, req_comp, w, h); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - if (comp)* comp = 4; - *y = h; - *x = w; - - return out; -} -#endif - -// ************************************************************************************************* -// Softimage PIC loader -// by Tom Seddon -// -// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format -// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ - -#ifndef STBI_NO_PIC -static int stbi__pic_is4(stbi__context* s, const char* str) -{ - int i; - for (i = 0; i < 4; ++i) - if (stbi__get8(s) != (stbi_uc)str[i]) - return 0; - - return 1; -} - -static int stbi__pic_test_core(stbi__context* s) -{ - int i; - - if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) - return 0; - - for (i = 0; i < 84; ++i) - stbi__get8(s); - - if (!stbi__pic_is4(s, "PICT")) - return 0; - - return 1; -} - -typedef struct -{ - stbi_uc size, type, channel; -} stbi__pic_packet; - -static stbi_uc* stbi__readval(stbi__context* s, int channel, stbi_uc* dest) -{ - int mask = 0x80, i; - - for (i = 0; i < 4; ++i, mask >>= 1) { - if (channel & mask) { - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "PIC file too short"); - dest[i] = stbi__get8(s); - } - } - - return dest; -} - -static void stbi__copyval(int channel, stbi_uc* dest, const stbi_uc* src) -{ - int mask = 0x80, i; - - for (i = 0; i < 4; ++i, mask >>= 1) - if (channel & mask) - dest[i] = src[i]; -} - -static stbi_uc* stbi__pic_load_core(stbi__context* s, int width, int height, int* comp, stbi_uc* result) -{ - int act_comp = 0, num_packets = 0, y, chained; - stbi__pic_packet packets[10]; - - // this will (should...) cater for even some bizarre stuff like having data - // for the same channel in multiple packets. - do { - stbi__pic_packet* packet; - - if (num_packets == sizeof(packets) / sizeof(packets[0])) - return stbi__errpuc("bad format", "too many packets"); - - packet = &packets[num_packets++]; - - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - - act_comp |= packet->channel; - - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (reading packets)"); - if (packet->size != 8) return stbi__errpuc("bad format", "packet isn't 8bpp"); - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? - - for (y = 0; y < height; ++y) { - int packet_idx; - - for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) { - stbi__pic_packet* packet = &packets[packet_idx]; - stbi_uc* dest = result + y * width * 4; - - switch (packet->type) { - default: - return stbi__errpuc("bad format", "packet has bad compression type"); - - case 0: {//uncompressed - int x; - - for (x = 0; x < width; ++x, dest += 4) - if (!stbi__readval(s, packet->channel, dest)) - return 0; - break; - } - - case 1://Pure RLE - { - int left = width, i; - - while (left > 0) { - stbi_uc count, value[4]; - - count = stbi__get8(s); - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (pure read count)"); - - if (count > left) - count = (stbi_uc)left; - - if (!stbi__readval(s, packet->channel, value)) return 0; - - for (i = 0; i < count; ++i, dest += 4) - stbi__copyval(packet->channel, dest, value); - left -= count; - } - } - break; - - case 2: {//Mixed RLE - int left = width; - while (left > 0) { - int count = stbi__get8(s), i; - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (mixed read count)"); - - if (count >= 128) { // Repeated - stbi_uc value[4]; - - if (count == 128) - count = stbi__get16be(s); - else - count -= 127; - if (count > left) - return stbi__errpuc("bad file", "scanline overrun"); - - if (!stbi__readval(s, packet->channel, value)) - return 0; - - for (i = 0; i < count; ++i, dest += 4) - stbi__copyval(packet->channel, dest, value); - } - else { // Raw - ++count; - if (count > left) return stbi__errpuc("bad file", "scanline overrun"); - - for (i = 0; i < count; ++i, dest += 4) - if (!stbi__readval(s, packet->channel, dest)) - return 0; - } - left -= count; - } - break; - } - } - } - } - - return result; -} - -static void* stbi__pic_load(stbi__context* s, int* px, int* py, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* result; - int i, x, y, internal_comp; - STBI_NOTUSED(ri); - - if (!comp) comp = &internal_comp; - - for (i = 0; i < 92; ++i) - stbi__get8(s); - - x = stbi__get16be(s); - y = stbi__get16be(s); - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (pic header)"); - if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); - - stbi__get32be(s); //skip `ratio' - stbi__get16be(s); //skip `fields' - stbi__get16be(s); //skip `pad' - - // intermediate buffer is RGBA - result = (stbi_uc*)stbi__malloc_mad3(x, y, 4, 0); - memset(result, 0xff, x * y * 4); - - if (!stbi__pic_load_core(s, x, y, comp, result)) { - STBI_FREE(result); - result = 0; - } - *px = x; - *py = y; - if (req_comp == 0) req_comp = *comp; - result = stbi__convert_format(result, 4, req_comp, x, y); - - return result; -} - -static int stbi__pic_test(stbi__context* s) -{ - int r = stbi__pic_test_core(s); - stbi__rewind(s); - return r; -} -#endif - -// ************************************************************************************************* -// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb - -#ifndef STBI_NO_GIF -typedef struct -{ - stbi__int16 prefix; - stbi_uc first; - stbi_uc suffix; -} stbi__gif_lzw; - -typedef struct -{ - int w, h; - stbi_uc* out; // output buffer (always 4 components) - stbi_uc* background; // The current "background" as far as a gif is concerned - stbi_uc* history; - int flags, bgindex, ratio, transparent, eflags; - stbi_uc pal[256][4]; - stbi_uc lpal[256][4]; - stbi__gif_lzw codes[8192]; - stbi_uc* color_table; - int parse, step; - int lflags; - int start_x, start_y; - int max_x, max_y; - int cur_x, cur_y; - int line_size; - int delay; -} stbi__gif; - -static int stbi__gif_test_raw(stbi__context* s) -{ - int sz; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; - sz = stbi__get8(s); - if (sz != '9' && sz != '7') return 0; - if (stbi__get8(s) != 'a') return 0; - return 1; -} - -static int stbi__gif_test(stbi__context* s) -{ - int r = stbi__gif_test_raw(s); - stbi__rewind(s); - return r; -} - -static void stbi__gif_parse_colortable(stbi__context* s, stbi_uc pal[256][4], int num_entries, int transp) -{ - int i; - for (i = 0; i < num_entries; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - pal[i][3] = transp == i ? 0 : 255; - } -} - -static int stbi__gif_header(stbi__context* s, stbi__gif* g, int* comp, int is_info) -{ - stbi_uc version; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') - return stbi__err("not GIF", "Corrupt GIF"); - - version = stbi__get8(s); - if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); - if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); - - stbi__g_failure_reason = ""; - g->w = stbi__get16le(s); - g->h = stbi__get16le(s); - g->flags = stbi__get8(s); - g->bgindex = stbi__get8(s); - g->ratio = stbi__get8(s); - g->transparent = -1; - - if (comp != 0)* comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments - - if (is_info) return 1; - - if (g->flags & 0x80) - stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1); - - return 1; -} - -static int stbi__gif_info_raw(stbi__context* s, int* x, int* y, int* comp) -{ - stbi__gif* g = (stbi__gif*)stbi__malloc(sizeof(stbi__gif)); - if (!stbi__gif_header(s, g, comp, 1)) { - STBI_FREE(g); - stbi__rewind(s); - return 0; - } - if (x)* x = g->w; - if (y)* y = g->h; - STBI_FREE(g); - return 1; -} - -static void stbi__out_gif_code(stbi__gif* g, stbi__uint16 code) -{ - stbi_uc* p, * c; - int idx; - - // recurse to decode the prefixes, since the linked-list is backwards, - // and working backwards through an interleaved image would be nasty - if (g->codes[code].prefix >= 0) - stbi__out_gif_code(g, g->codes[code].prefix); - - if (g->cur_y >= g->max_y) return; - - idx = g->cur_x + g->cur_y; - p = &g->out[idx]; - g->history[idx / 4] = 1; - - c = &g->color_table[g->codes[code].suffix * 4]; - if (c[3] > 128) { // don't render transparent pixels; - p[0] = c[2]; - p[1] = c[1]; - p[2] = c[0]; - p[3] = c[3]; - } - g->cur_x += 4; - - if (g->cur_x >= g->max_x) { - g->cur_x = g->start_x; - g->cur_y += g->step; - - while (g->cur_y >= g->max_y && g->parse > 0) { - g->step = (1 << g->parse) * g->line_size; - g->cur_y = g->start_y + (g->step >> 1); - --g->parse; - } - } -} - -static stbi_uc* stbi__process_gif_raster(stbi__context* s, stbi__gif* g) -{ - stbi_uc lzw_cs; - stbi__int32 len, init_code; - stbi__uint32 first; - stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; - stbi__gif_lzw* p; - - lzw_cs = stbi__get8(s); - if (lzw_cs > 12) return NULL; - clear = 1 << lzw_cs; - first = 1; - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - bits = 0; - valid_bits = 0; - for (init_code = 0; init_code < clear; init_code++) { - g->codes[init_code].prefix = -1; - g->codes[init_code].first = (stbi_uc)init_code; - g->codes[init_code].suffix = (stbi_uc)init_code; - } - - // support no starting clear code - avail = clear + 2; - oldcode = -1; - - len = 0; - for (;;) { - if (valid_bits < codesize) { - if (len == 0) { - len = stbi__get8(s); // start new block - if (len == 0) - return g->out; - } - --len; - bits |= (stbi__int32)stbi__get8(s) << valid_bits; - valid_bits += 8; - } - else { - stbi__int32 code = bits & codemask; - bits >>= codesize; - valid_bits -= codesize; - // @OPTIMIZE: is there some way we can accelerate the non-clear path? - if (code == clear) { // clear code - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - avail = clear + 2; - oldcode = -1; - first = 0; - } - else if (code == clear + 1) { // end of stream code - stbi__skip(s, len); - while ((len = stbi__get8(s)) > 0) - stbi__skip(s, len); - return g->out; - } - else if (code <= avail) { - if (first) { - return stbi__errpuc("no clear code", "Corrupt GIF"); - } - - if (oldcode >= 0) { - p = &g->codes[avail++]; - if (avail > 8192) { - return stbi__errpuc("too many codes", "Corrupt GIF"); - } - - p->prefix = (stbi__int16)oldcode; - p->first = g->codes[oldcode].first; - p->suffix = (code == avail) ? p->first : g->codes[code].first; - } - else if (code == avail) - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - - stbi__out_gif_code(g, (stbi__uint16)code); - - if ((avail & codemask) == 0 && avail <= 0x0FFF) { - codesize++; - codemask = (1 << codesize) - 1; - } - - oldcode = code; - } - else { - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - } - } - } -} - -// this function is designed to support animated gifs, although stb_image doesn't support it -// two back is the image from two frames ago, used for a very specific disposal format -static stbi_uc* stbi__gif_load_next(stbi__context* s, stbi__gif* g, int* comp, int req_comp, stbi_uc* two_back) -{ - int dispose; - int first_frame; - int pi; - int pcount; - - // on first frame, any non-written pixels get the background colour (non-transparent) - first_frame = 0; - if (g->out == 0) { - if (!stbi__gif_header(s, g, comp, 0)) return 0; // stbi__g_failure_reason set by stbi__gif_header - g->out = (stbi_uc*)stbi__malloc(4 * g->w * g->h); - g->background = (stbi_uc*)stbi__malloc(4 * g->w * g->h); - g->history = (stbi_uc*)stbi__malloc(g->w * g->h); - if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); - - // image is treated as "tranparent" at the start - ie, nothing overwrites the current background; - // background colour is only used for pixels that are not rendered first frame, after that "background" - // color refers to teh color that was there the previous frame. - memset(g->out, 0x00, 4 * g->w * g->h); - memset(g->background, 0x00, 4 * g->w * g->h); // state of the background (starts transparent) - memset(g->history, 0x00, g->w * g->h); // pixels that were affected previous frame - first_frame = 1; - } - else { - // second frame - how do we dispoase of the previous one? - dispose = (g->eflags & 0x1C) >> 2; - pcount = g->w * g->h; - - if ((dispose == 3) && (two_back == 0)) { - dispose = 2; // if I don't have an image to revert back to, default to the old background - } - - if (dispose == 3) { // use previous graphic - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy(&g->out[pi * 4], &two_back[pi * 4], 4); - } - } - } - else if (dispose == 2) { - // restore what was changed last frame to background before that frame; - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy(&g->out[pi * 4], &g->background[pi * 4], 4); - } - } - } - else { - // This is a non-disposal case eithe way, so just - // leave the pixels as is, and they will become the new background - // 1: do not dispose - // 0: not specified. - } - - // background is what out is after the undoing of the previou frame; - memcpy(g->background, g->out, 4 * g->w * g->h); - } - - // clear my history; - memset(g->history, 0x00, g->w * g->h); // pixels that were affected previous frame - - for (;;) { - int tag = stbi__get8(s); - switch (tag) { - case 0x2C: /* Image Descriptor */ - { - stbi__int32 x, y, w, h; - stbi_uc* o; - - x = stbi__get16le(s); - y = stbi__get16le(s); - w = stbi__get16le(s); - h = stbi__get16le(s); - if (((x + w) > (g->w)) || ((y + h) > (g->h))) - return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); - - g->line_size = g->w * 4; - g->start_x = x * 4; - g->start_y = y * g->line_size; - g->max_x = g->start_x + w * 4; - g->max_y = g->start_y + h * g->line_size; - g->cur_x = g->start_x; - g->cur_y = g->start_y; - - g->lflags = stbi__get8(s); - - if (g->lflags & 0x40) { - g->step = 8 * g->line_size; // first interlaced spacing - g->parse = 3; - } - else { - g->step = g->line_size; - g->parse = 0; - } - - if (g->lflags & 0x80) { - stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); - g->color_table = (stbi_uc*)g->lpal; - } - else if (g->flags & 0x80) { - g->color_table = (stbi_uc*)g->pal; - } - else - return stbi__errpuc("missing color table", "Corrupt GIF"); - - o = stbi__process_gif_raster(s, g); - if (o == NULL) return NULL; - - // if this was the first frame, - pcount = g->w * g->h; - if (first_frame && (g->bgindex > 0)) { - // if first frame, any pixel not drawn to gets the background color - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi] == 0) { - g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; - memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4); - } - } - } - - return o; - } - - case 0x21: // Comment Extension. - { - int len; - int ext = stbi__get8(s); - if (ext == 0xF9) { // Graphic Control Extension. - len = stbi__get8(s); - if (len == 4) { - g->eflags = stbi__get8(s); - g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. - - // unset old transparent - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 255; - } - if (g->eflags & 0x01) { - g->transparent = stbi__get8(s); - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 0; - } - } - else { - // don't need transparent - stbi__skip(s, 1); - g->transparent = -1; - } - } - else { - stbi__skip(s, len); - break; - } - } - while ((len = stbi__get8(s)) != 0) { - stbi__skip(s, len); - } - break; - } - - case 0x3B: // gif stream termination code - return (stbi_uc*)s; // using '1' causes warning on some compilers - - default: - return stbi__errpuc("unknown code", "Corrupt GIF"); - } - } -} - -static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp) -{ - if (stbi__gif_test(s)) { - int layers = 0; - stbi_uc* u = 0; - stbi_uc* out = 0; - stbi_uc* two_back = 0; - stbi__gif g; - int stride; - memset(&g, 0, sizeof(g)); - if (delays) { - *delays = 0; - } - - do { - u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); - if (u == (stbi_uc*)s) u = 0; // end of animated gif marker - - if (u) { - *x = g.w; - *y = g.h; - ++layers; - stride = g.w * g.h * 4; - - if (out) { - out = (stbi_uc*)STBI_REALLOC(out, layers * stride); - if (delays) { - *delays = (int*)STBI_REALLOC(*delays, sizeof(int) * layers); - } - } - else { - out = (stbi_uc*)stbi__malloc(layers * stride); - if (delays) { - *delays = (int*)stbi__malloc(layers * sizeof(int)); - } - } - memcpy(out + ((layers - 1) * stride), u, stride); - if (layers >= 2) { - two_back = out - 2 * stride; - } - - if (delays) { - (*delays)[layers - 1U] = g.delay; - } - } - } while (u != 0); - - // free temp buffer; - STBI_FREE(g.out); - STBI_FREE(g.history); - STBI_FREE(g.background); - - // do the final conversion after loading everything; - if (req_comp && req_comp != 4) - out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); - - *z = layers; - return out; - } - else { - return stbi__errpuc("not GIF", "Image was not as a gif type."); - } -} - -static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* u = 0; - stbi__gif g; - memset(&g, 0, sizeof(g)); - - u = stbi__gif_load_next(s, &g, comp, req_comp, 0); - if (u == (stbi_uc*)s) u = 0; // end of animated gif marker - if (u) { - *x = g.w; - *y = g.h; - - // moved conversion to after successful load so that the same - // can be done for multiple frames. - if (req_comp && req_comp != 4) - u = stbi__convert_format(u, 4, req_comp, g.w, g.h); - } - - // free buffers needed for multiple frame loading; - STBI_FREE(g.history); - STBI_FREE(g.background); - - return u; -} - -static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp) -{ - return stbi__gif_info_raw(s, x, y, comp); -} -#endif - -// ************************************************************************************************* -// Radiance RGBE HDR loader -// originally by Nicolas Schulz -#ifndef STBI_NO_HDR -static int stbi__hdr_test_core(stbi__context* s, const char* signature) -{ - int i; - for (i = 0; signature[i]; ++i) - if (stbi__get8(s) != signature[i]) - return 0; - stbi__rewind(s); - return 1; -} - -static int stbi__hdr_test(stbi__context* s) -{ - int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); - stbi__rewind(s); - if (!r) { - r = stbi__hdr_test_core(s, "#?RGBE\n"); - stbi__rewind(s); - } - return r; -} - -#define STBI__HDR_BUFLEN 1024 -static char* stbi__hdr_gettoken(stbi__context * z, char* buffer) -{ - int len = 0; - char c = '\0'; - - c = (char)stbi__get8(z); - - while (!stbi__at_eof(z) && c != '\n') { - buffer[len++] = c; - if (len == STBI__HDR_BUFLEN - 1) { - // flush to end of line - while (!stbi__at_eof(z) && stbi__get8(z) != '\n') - ; - break; - } - c = (char)stbi__get8(z); - } - - buffer[len] = 0; - return buffer; -} - -static void stbi__hdr_convert(float* output, stbi_uc* input, int req_comp) -{ - if (input[3] != 0) { - float f1; - // Exponent - f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8)); - if (req_comp <= 2) - output[0] = (input[0] + input[1] + input[2]) * f1 / 3; - else { - output[0] = input[0] * f1; - output[1] = input[1] * f1; - output[2] = input[2] * f1; - } - if (req_comp == 2) output[1] = 1; - if (req_comp == 4) output[3] = 1; - } - else { - switch (req_comp) { - case 4: output[3] = 1; /* fallthrough */ - case 3: output[0] = output[1] = output[2] = 0; - break; - case 2: output[1] = 1; /* fallthrough */ - case 1: output[0] = 0; - break; - } - } -} - -static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - char buffer[STBI__HDR_BUFLEN]; - char* token; - int valid = 0; - int width, height; - stbi_uc* scanline; - float* hdr_data; - int len; - unsigned char count, value; - int i, j, k, c1, c2, z; - const char* headerToken; - STBI_NOTUSED(ri); - - // Check identifier - headerToken = stbi__hdr_gettoken(s, buffer); - if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) - return stbi__errpf("not HDR", "Corrupt HDR image"); - - // Parse header - for (;;) { - token = stbi__hdr_gettoken(s, buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); - - // Parse width and height - // can't use sscanf() if we're not using stdio! - token = stbi__hdr_gettoken(s, buffer); - if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - height = (int)strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - width = (int)strtol(token, NULL, 10); - - *x = width; - *y = height; - - if (comp)* comp = 3; - if (req_comp == 0) req_comp = 3; - - if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) - return stbi__errpf("too large", "HDR image is too large"); - - // Read data - hdr_data = (float*)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); - if (!hdr_data) - return stbi__errpf("outofmem", "Out of memory"); - - // Load image data - // image data is stored as some number of sca - if (width < 8 || width >= 32768) { - // Read flat data - for (j = 0; j < height; ++j) { - for (i = 0; i < width; ++i) { - stbi_uc rgbe[4]; - main_decode_loop: - stbi__getn(s, rgbe, 4); - stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); - } - } - } - else { - // Read RLE-encoded data - scanline = NULL; - - for (j = 0; j < height; ++j) { - c1 = stbi__get8(s); - c2 = stbi__get8(s); - len = stbi__get8(s); - if (c1 != 2 || c2 != 2 || (len & 0x80)) { - // not run-length encoded, so we have to actually use THIS data as a decoded - // pixel (note this can't be a valid pixel--one of RGB must be >= 128) - stbi_uc rgbe[4]; - rgbe[0] = (stbi_uc)c1; - rgbe[1] = (stbi_uc)c2; - rgbe[2] = (stbi_uc)len; - rgbe[3] = (stbi_uc)stbi__get8(s); - stbi__hdr_convert(hdr_data, rgbe, req_comp); - i = 1; - j = 0; - STBI_FREE(scanline); - goto main_decode_loop; // yes, this makes no sense - } - len <<= 8; - len |= stbi__get8(s); - if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } - if (scanline == NULL) { - scanline = (stbi_uc*)stbi__malloc_mad2(width, 4, 0); - if (!scanline) { - STBI_FREE(hdr_data); - return stbi__errpf("outofmem", "Out of memory"); - } - } - - for (k = 0; k < 4; ++k) { - int nleft; - i = 0; - while ((nleft = width - i) > 0) { - count = stbi__get8(s); - if (count > 128) { - // Run - value = stbi__get8(s); - count -= 128; - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = value; - } - else { - // Dump - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = stbi__get8(s); - } - } - } - for (i = 0; i < width; ++i) - stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp); - } - if (scanline) - STBI_FREE(scanline); - } - - return hdr_data; -} - -static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp) -{ - char buffer[STBI__HDR_BUFLEN]; - char* token; - int valid = 0; - int dummy; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (stbi__hdr_test(s) == 0) { - stbi__rewind(s); - return 0; - } - - for (;;) { - token = stbi__hdr_gettoken(s, buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) { - stbi__rewind(s); - return 0; - } - token = stbi__hdr_gettoken(s, buffer); - if (strncmp(token, "-Y ", 3)) { - stbi__rewind(s); - return 0; - } - token += 3; - *y = (int)strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) { - stbi__rewind(s); - return 0; - } - token += 3; - *x = (int)strtol(token, NULL, 10); - *comp = 3; - return 1; -} -#endif // STBI_NO_HDR - -#ifndef STBI_NO_BMP -static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp) -{ - void* p; - stbi__bmp_data info; - - info.all_a = 255; - p = stbi__bmp_parse_header(s, &info); - stbi__rewind(s); - if (p == NULL) - return 0; - if (x)* x = s->img_x; - if (y)* y = s->img_y; - if (comp)* comp = info.ma ? 4 : 3; - return 1; -} -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp) -{ - int channelCount, dummy, depth; - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind(s); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind(s); - return 0; - } - *y = stbi__get32be(s); - *x = stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 8 && depth != 16) { - stbi__rewind(s); - return 0; - } - if (stbi__get16be(s) != 3) { - stbi__rewind(s); - return 0; - } - *comp = 4; - return 1; -} - -static int stbi__psd_is16(stbi__context* s) -{ - int channelCount, depth; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind(s); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind(s); - return 0; - } - (void)stbi__get32be(s); - (void)stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 16) { - stbi__rewind(s); - return 0; - } - return 1; -} -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp) -{ - int act_comp = 0, num_packets = 0, chained, dummy; - stbi__pic_packet packets[10]; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) { - stbi__rewind(s); - return 0; - } - - stbi__skip(s, 88); - - *x = stbi__get16be(s); - *y = stbi__get16be(s); - if (stbi__at_eof(s)) { - stbi__rewind(s); - return 0; - } - if ((*x) != 0 && (1 << 28) / (*x) < (*y)) { - stbi__rewind(s); - return 0; - } - - stbi__skip(s, 8); - - do { - stbi__pic_packet* packet; - - if (num_packets == sizeof(packets) / sizeof(packets[0])) - return 0; - - packet = &packets[num_packets++]; - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - act_comp |= packet->channel; - - if (stbi__at_eof(s)) { - stbi__rewind(s); - return 0; - } - if (packet->size != 8) { - stbi__rewind(s); - return 0; - } - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); - - return 1; -} -#endif - -// ************************************************************************************************* -// Portable Gray Map and Portable Pixel Map loader -// by Ken Miller -// -// PGM: http://netpbm.sourceforge.net/doc/pgm.html -// PPM: http://netpbm.sourceforge.net/doc/ppm.html -// -// Known limitations: -// Does not support comments in the header section -// Does not support ASCII image data (formats P2 and P3) -// Does not support 16-bit-per-channel - -#ifndef STBI_NO_PNM - -static int stbi__pnm_test(stbi__context* s) -{ - char p, t; - p = (char)stbi__get8(s); - t = (char)stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind(s); - return 0; - } - return 1; -} - -static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* out; - STBI_NOTUSED(ri); - - if (!stbi__pnm_info(s, (int*)& s->img_x, (int*)& s->img_y, (int*)& s->img_n)) - return 0; - - *x = s->img_x; - *y = s->img_y; - if (comp)* comp = s->img_n; - - if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "PNM too large"); - - out = (stbi_uc*)stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - stbi__getn(s, out, s->img_n * s->img_x * s->img_y); - - if (req_comp && req_comp != s->img_n) { - out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - return out; -} - -static int stbi__pnm_isspace(char c) -{ - return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; -} - -static void stbi__pnm_skip_whitespace(stbi__context* s, char* c) -{ - for (;;) { - while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) - * c = (char)stbi__get8(s); - - if (stbi__at_eof(s) || *c != '#') - break; - - while (!stbi__at_eof(s) && *c != '\n' && *c != '\r') - * c = (char)stbi__get8(s); - } -} - -static int stbi__pnm_isdigit(char c) -{ - return c >= '0' && c <= '9'; -} - -static int stbi__pnm_getinteger(stbi__context* s, char* c) -{ - int value = 0; - - while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { - value = value * 10 + (*c - '0'); - *c = (char)stbi__get8(s); - } - - return value; -} - -static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp) -{ - int maxv, dummy; - char c, p, t; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - stbi__rewind(s); - - // Get identifier - p = (char)stbi__get8(s); - t = (char)stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind(s); - return 0; - } - - *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm - - c = (char)stbi__get8(s); - stbi__pnm_skip_whitespace(s, &c); - - *x = stbi__pnm_getinteger(s, &c); // read width - stbi__pnm_skip_whitespace(s, &c); - - *y = stbi__pnm_getinteger(s, &c); // read height - stbi__pnm_skip_whitespace(s, &c); - - maxv = stbi__pnm_getinteger(s, &c); // read max value - - if (maxv > 255) - return stbi__err("max value > 255", "PPM image not 8-bit"); - else - return 1; -} -#endif - -static int stbi__info_main(stbi__context* s, int* x, int* y, int* comp) -{ -#ifndef STBI_NO_JPEG - if (stbi__jpeg_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PNG - if (stbi__png_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_GIF - if (stbi__gif_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_BMP - if (stbi__bmp_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PSD - if (stbi__psd_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PIC - if (stbi__pic_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PNM - if (stbi__pnm_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_HDR - if (stbi__hdr_info(s, x, y, comp)) return 1; -#endif - - // test tga last because it's a crappy test! -#ifndef STBI_NO_TGA - if (stbi__tga_info(s, x, y, comp)) - return 1; -#endif - return stbi__err("unknown image type", "Image not of any known type, or corrupt"); -} - -static int stbi__is_16_main(stbi__context* s) -{ -#ifndef STBI_NO_PNG - if (stbi__png_is16(s)) return 1; -#endif - -#ifndef STBI_NO_PSD - if (stbi__psd_is16(s)) return 1; -#endif - - return 0; -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp) -{ - FILE* f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_info_from_file(f, x, y, comp); - fclose(f); - return result; -} - -STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__info_main(&s, x, y, comp); - fseek(f, pos, SEEK_SET); - return r; -} - -STBIDEF int stbi_is_16_bit(char const* filename) -{ - FILE* f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_is_16_bit_from_file(f); - fclose(f); - return result; -} - -STBIDEF int stbi_is_16_bit_from_file(FILE* f) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__is_16_main(&s); - fseek(f, pos, SEEK_SET); - return r; -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__info_main(&s, x, y, comp); -} - -STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* c, void* user, int* x, int* y, int* comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user); - return stbi__info_main(&s, x, y, comp); -} - -STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__is_16_main(&s); -} - -STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* c, void* user) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user); - return stbi__is_16_main(&s); -} - -#endif // STB_IMAGE_IMPLEMENTATION - -/* - revision history: - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug - 1-bit BMP - *_is_16_bit api - avoid warnings - 2.16 (2017-07-23) all functions have 16-bit variants; - STBI_NO_STDIO works again; - compilation fixes; - fix rounding in unpremultiply; - optimize vertical flip; - disable raw_len validation; - documentation fixes - 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; - warning fixes; disable run-time SSE detection on gcc; - uniform handling of optional "return" values; - thread-safe initialization of zlib tables - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) allocate large structures on the stack - remove white matting for transparent PSD - fix reported channel count for PNG & BMP - re-enable SSE2 in non-gcc 64-bit - support RGB-formatted JPEG - read 16-bit PNGs (only as 8-bit) - 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED - 2.09 (2016-01-16) allow comments in PNM files - 16-bit-per-pixel TGA (not bit-per-component) - info() for TGA could break due to .hdr handling - info() for BMP to shares code instead of sloppy parse - can use STBI_REALLOC_SIZED if allocator doesn't support realloc - code cleanup - 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA - 2.07 (2015-09-13) fix compiler warnings - partial animated GIF support - limited 16-bpc PSD support - #ifdef unused functions - bug with < 92 byte PIC,PNM,HDR,TGA - 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value - 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning - 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit - 2.03 (2015-04-12) extra corruption checking (mmozeiko) - stbi_set_flip_vertically_on_load (nguillemot) - fix NEON support; fix mingw support - 2.02 (2015-01-19) fix incorrect assert, fix warning - 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 - 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG - 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) - progressive JPEG (stb) - PGM/PPM support (Ken Miller) - STBI_MALLOC,STBI_REALLOC,STBI_FREE - GIF bugfix -- seemingly never worked - STBI_NO_*, STBI_ONLY_* - 1.48 (2014-12-14) fix incorrectly-named assert() - 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) - optimize PNG (ryg) - fix bug in interlaced PNG with user-specified channel count (stb) - 1.46 (2014-08-26) - fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG - 1.45 (2014-08-16) - fix MSVC-ARM internal compiler error by wrapping malloc - 1.44 (2014-08-07) - various warning fixes from Ronny Chevalier - 1.43 (2014-07-15) - fix MSVC-only compiler problem in code changed in 1.42 - 1.42 (2014-07-09) - don't define _CRT_SECURE_NO_WARNINGS (affects user code) - fixes to stbi__cleanup_jpeg path - added STBI_ASSERT to avoid requiring assert.h - 1.41 (2014-06-25) - fix search&replace from 1.36 that messed up comments/error messages - 1.40 (2014-06-22) - fix gcc struct-initialization warning - 1.39 (2014-06-15) - fix to TGA optimization when req_comp != number of components in TGA; - fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) - add support for BMP version 5 (more ignored fields) - 1.38 (2014-06-06) - suppress MSVC warnings on integer casts truncating values - fix accidental rename of 'skip' field of I/O - 1.37 (2014-06-04) - remove duplicate typedef - 1.36 (2014-06-03) - convert to header file single-file library - if de-iphone isn't set, load iphone images color-swapped instead of returning NULL - 1.35 (2014-05-27) - various warnings - fix broken STBI_SIMD path - fix bug where stbi_load_from_file no longer left file pointer in correct place - fix broken non-easy path for 32-bit BMP (possibly never used) - TGA optimization by Arseny Kapoulkine - 1.34 (unknown) - use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case - 1.33 (2011-07-14) - make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements - 1.32 (2011-07-13) - support for "info" function for all supported filetypes (SpartanJ) - 1.31 (2011-06-20) - a few more leak fixes, bug in PNG handling (SpartanJ) - 1.30 (2011-06-11) - added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) - removed deprecated format-specific test/load functions - removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway - error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) - fix inefficiency in decoding 32-bit BMP (David Woo) - 1.29 (2010-08-16) - various warning fixes from Aurelien Pocheville - 1.28 (2010-08-01) - fix bug in GIF palette transparency (SpartanJ) - 1.27 (2010-08-01) - cast-to-stbi_uc to fix warnings - 1.26 (2010-07-24) - fix bug in file buffering for PNG reported by SpartanJ - 1.25 (2010-07-17) - refix trans_data warning (Won Chun) - 1.24 (2010-07-12) - perf improvements reading from files on platforms with lock-heavy fgetc() - minor perf improvements for jpeg - deprecated type-specific functions so we'll get feedback if they're needed - attempt to fix trans_data warning (Won Chun) - 1.23 fixed bug in iPhone support - 1.22 (2010-07-10) - removed image *writing* support - stbi_info support from Jetro Lauha - GIF support from Jean-Marc Lienher - iPhone PNG-extensions from James Brown - warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) - 1.21 fix use of 'stbi_uc' in header (reported by jon blow) - 1.20 added support for Softimage PIC, by Tom Seddon - 1.19 bug in interlaced PNG corruption check (found by ryg) - 1.18 (2008-08-02) - fix a threading bug (local mutable static) - 1.17 support interlaced PNG - 1.16 major bugfix - stbi__convert_format converted one too many pixels - 1.15 initialize some fields for thread safety - 1.14 fix threadsafe conversion bug - header-file-only version (#define STBI_HEADER_FILE_ONLY before including) - 1.13 threadsafe - 1.12 const qualifiers in the API - 1.11 Support installable IDCT, colorspace conversion routines - 1.10 Fixes for 64-bit (don't use "unsigned long") - optimized upsampling by Fabian "ryg" Giesen - 1.09 Fix format-conversion for PSD code (bad global variables!) - 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz - 1.07 attempt to fix C++ warning/errors again - 1.06 attempt to fix C++ warning/errors again - 1.05 fix TGA loading to return correct *comp and use good luminance calc - 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free - 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR - 1.02 support for (subset of) HDR files, float interface for preferred access to them - 1.01 fix bug: possible bug in handling right-side up bmps... not sure - fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all - 1.00 interface to zlib that skips zlib header - 0.99 correct handling of alpha in palette - 0.98 TGA loader by lonesock; dynamically add loaders (untested) - 0.97 jpeg errors on too large a file; also catch another malloc failure - 0.96 fix detection of invalid v value - particleman@mollyrocket forum - 0.95 during header scan, seek to markers in case of padding - 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same - 0.93 handle jpegtran output; verbose errors - 0.92 read 4,8,16,24,32-bit BMP files of several formats - 0.91 output 24-bit Windows 3.0 BMP files - 0.90 fix a few more warnings; bump version number to approach 1.0 - 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd - 0.60 fix compiling as c++ - 0.59 fix warnings: merge Dave Moore's -Wall fixes - 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian - 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available - 0.56 fix bug: zlib uncompressed mode len vs. nlen - 0.55 fix bug: restart_interval not initialized to 0 - 0.54 allow NULL for 'int *comp' - 0.53 fix bug in png 3->4; speedup png decoding - 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments - 0.51 obey req_comp requests, 1-component jpegs return as 1-component, - on 'test' only check type, not whether we support this variant - 0.50 (2006-11-19) - first released version -*/ - - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/ diff --git a/src/util/stb_image_write.hpp b/src/util/stb_image_write.hpp deleted file mode 100644 index 764761a..0000000 --- a/src/util/stb_image_write.hpp +++ /dev/null @@ -1,7568 +0,0 @@ -/* stb_image - v2.19 - public domain image loader - http://nothings.org/stb - no warranty implied; use at your own risk - - Do this: - #define STB_IMAGE_IMPLEMENTATION - before you include this file in *one* C or C++ file to create the implementation. - - // i.e. it should look like this: - #include ... - #include ... - #include ... - #define STB_IMAGE_IMPLEMENTATION - #include "stb_image.h" - - You can #define STBI_ASSERT(x) before the #include to avoid using assert.h. - And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free - - - QUICK NOTES: - Primarily of interest to game developers and other people who can - avoid problematic images and only need the trivial interface - - JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib) - PNG 1/2/4/8/16-bit-per-channel - - TGA (not sure what subset, if a subset) - BMP non-1bpp, non-RLE - PSD (composited view only, no extra channels, 8/16 bit-per-channel) - - GIF (*comp always reports as 4-channel) - HDR (radiance rgbE format) - PIC (Softimage PIC) - PNM (PPM and PGM binary only) - - Animated GIF still needs a proper API, but here's one way to do it: - http://gist.github.com/urraka/685d9a6340b26b830d49 - - - decode from memory or through FILE (define STBI_NO_STDIO to remove code) - - decode from arbitrary I/O callbacks - - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON) - - Full documentation under "DOCUMENTATION" below. - - -LICENSE - - See end of file for license information. - -RECENT REVISION HISTORY: - - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings - 2.16 (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes - 2.15 (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-12-04) experimental 16-bit API, only for PNG so far; fixes - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64 - RGB-format JPEG; remove white matting in PSD; - allocate large structures on the stack; - correct channel count for PNG & BMP - 2.10 (2016-01-22) avoid warning introduced in 2.09 - 2.09 (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED - - See end of file for full revision history. - - - ============================ Contributors ========================= - - Image formats Extensions, features - Sean Barrett (jpeg, png, bmp) Jetro Lauha (stbi_info) - Nicolas Schulz (hdr, psd) Martin "SpartanJ" Golini (stbi_info) - Jonathan Dummer (tga) James "moose2000" Brown (iPhone PNG) - Jean-Marc Lienher (gif) Ben "Disch" Wenger (io callbacks) - Tom Seddon (pic) Omar Cornut (1/2/4-bit PNG) - Thatcher Ulrich (psd) Nicolas Guillemot (vertical flip) - Ken Miller (pgm, ppm) Richard Mitton (16-bit PSD) - github:urraka (animated gif) Junggon Kim (PNM comments) - Christopher Forseth (animated gif) Daniel Gibson (16-bit TGA) - socks-the-fox (16-bit PNG) - Jeremy Sawicki (handle all ImageNet JPGs) - Optimizations & bugfixes Mikhail Morozov (1-bit BMP) - Fabian "ryg" Giesen Anael Seghezzi (is-16-bit query) - Arseny Kapoulkine - John-Mark Allen - - Bug & warning fixes - Marc LeBlanc David Woo Guillaume George Martins Mozeiko - Christpher Lloyd Jerry Jansson Joseph Thomson Phil Jordan - Dave Moore Roy Eltham Hayaki Saito Nathan Reed - Won Chun Luke Graham Johan Duparc Nick Verigakis - the Horde3D community Thomas Ruf Ronny Chevalier github:rlyeh - Janez Zemva John Bartholomew Michal Cichon github:romigrou - Jonathan Blow Ken Hamada Tero Hanninen github:svdijk - Laurent Gomila Cort Stratton Sergio Gonzalez github:snagar - Aruelien Pocheville Thibault Reuille Cass Everitt github:Zelex - Ryamond Barbiero Paul Du Bois Engin Manap github:grim210 - Aldo Culquicondor Philipp Wiesemann Dale Weiler github:sammyhw - Oriol Ferrer Mesia Josh Tobin Matthew Gregan github:phprus - Julian Raschke Gregory Mullen Baldur Karlsson github:poppolopoppo - Christian Floisand Kevin Schmidt github:darealshinji - Blazej Dariusz Roszkowski github:Michaelangel007 -*/ - -#ifndef STBI_INCLUDE_STB_IMAGE_H -#define STBI_INCLUDE_STB_IMAGE_H - -// DOCUMENTATION -// -// Limitations: -// - no 12-bit-per-channel JPEG -// - no JPEGs with arithmetic coding -// - GIF always returns *comp=4 -// -// Basic usage (see HDR discussion below for HDR usage): -// int x,y,n; -// unsigned char *data = stbi_load(filename, &x, &y, &n, 0); -// // ... process data if not NULL ... -// // ... x = width, y = height, n = # 8-bit components per pixel ... -// // ... replace '0' with '1'..'4' to force that many components per pixel -// // ... but 'n' will always be the number that it would have been if you said 0 -// stbi_image_free(data) -// -// Standard parameters: -// int *x -- outputs image width in pixels -// int *y -- outputs image height in pixels -// int *channels_in_file -- outputs # of image components in image file -// int desired_channels -- if non-zero, # of image components requested in result -// -// The return value from an image loader is an 'unsigned char *' which points -// to the pixel data, or NULL on an allocation failure or if the image is -// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels, -// with each pixel consisting of N interleaved 8-bit components; the first -// pixel pointed to is top-left-most in the image. There is no padding between -// image scanlines or between pixels, regardless of format. The number of -// components N is 'desired_channels' if desired_channels is non-zero, or -// *channels_in_file otherwise. If desired_channels is non-zero, -// *channels_in_file has the number of components that _would_ have been -// output otherwise. E.g. if you set desired_channels to 4, you will always -// get RGBA output, but you can check *channels_in_file to see if it's trivially -// opaque because e.g. there were only 3 channels in the source image. -// -// An output image with N components has the following components interleaved -// in this order in each pixel: -// -// N=#comp components -// 1 grey -// 2 grey, alpha -// 3 red, green, blue -// 4 red, green, blue, alpha -// -// If image loading fails for any reason, the return value will be NULL, -// and *x, *y, *channels_in_file will be unchanged. The function -// stbi_failure_reason() can be queried for an extremely brief, end-user -// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS -// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly -// more user-friendly ones. -// -// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized. -// -// =========================================================================== -// -// Philosophy -// -// stb libraries are designed with the following priorities: -// -// 1. easy to use -// 2. easy to maintain -// 3. good performance -// -// Sometimes I let "good performance" creep up in priority over "easy to maintain", -// and for best performance I may provide less-easy-to-use APIs that give higher -// performance, in addition to the easy to use ones. Nevertheless, it's important -// to keep in mind that from the standpoint of you, a client of this library, -// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all. -// -// Some secondary priorities arise directly from the first two, some of which -// make more explicit reasons why performance can't be emphasized. -// -// - Portable ("ease of use") -// - Small source code footprint ("easy to maintain") -// - No dependencies ("ease of use") -// -// =========================================================================== -// -// I/O callbacks -// -// I/O callbacks allow you to read from arbitrary sources, like packaged -// files or some other source. Data read from callbacks are processed -// through a small internal buffer (currently 128 bytes) to try to reduce -// overhead. -// -// The three functions you must define are "read" (reads some bytes of data), -// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end). -// -// =========================================================================== -// -// SIMD support -// -// The JPEG decoder will try to automatically use SIMD kernels on x86 when -// supported by the compiler. For ARM Neon support, you must explicitly -// request it. -// -// (The old do-it-yourself SIMD API is no longer supported in the current -// code.) -// -// On x86, SSE2 will automatically be used when available based on a run-time -// test; if not, the generic C versions are used as a fall-back. On ARM targets, -// the typical path is to have separate builds for NEON and non-NEON devices -// (at least this is true for iOS and Android). Therefore, the NEON support is -// toggled by a build flag: define STBI_NEON to get NEON loops. -// -// If for some reason you do not want to use any of SIMD code, or if -// you have issues compiling it, you can disable it entirely by -// defining STBI_NO_SIMD. -// -// =========================================================================== -// -// HDR image support (disable by defining STBI_NO_HDR) -// -// stb_image now supports loading HDR images in general, and currently -// the Radiance .HDR file format, although the support is provided -// generically. You can still load any file through the existing interface; -// if you attempt to load an HDR file, it will be automatically remapped to -// LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1; -// both of these constants can be reconfigured through this interface: -// -// stbi_hdr_to_ldr_gamma(2.2f); -// stbi_hdr_to_ldr_scale(1.0f); -// -// (note, do not use _inverse_ constants; stbi_image will invert them -// appropriately). -// -// Additionally, there is a new, parallel interface for loading files as -// (linear) floats to preserve the full dynamic range: -// -// float *data = stbi_loadf(filename, &x, &y, &n, 0); -// -// If you load LDR images through this interface, those images will -// be promoted to floating point values, run through the inverse of -// constants corresponding to the above: -// -// stbi_ldr_to_hdr_scale(1.0f); -// stbi_ldr_to_hdr_gamma(2.2f); -// -// Finally, given a filename (or an open file or memory block--see header -// file for details) containing image data, you can query for the "most -// appropriate" interface to use (that is, whether the image is HDR or -// not), using: -// -// stbi_is_hdr(char *filename); -// -// =========================================================================== -// -// iPhone PNG support: -// -// By default we convert iphone-formatted PNGs back to RGB, even though -// they are internally encoded differently. You can disable this conversion -// by by calling stbi_convert_iphone_png_to_rgb(0), in which case -// you will always just get the native iphone "format" through (which -// is BGR stored in RGB). -// -// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per -// pixel to remove any premultiplied alpha *only* if the image file explicitly -// says there's premultiplied data (currently only happens in iPhone images, -// and only if iPhone convert-to-rgb processing is on). -// -// =========================================================================== -// -// ADDITIONAL CONFIGURATION -// -// - You can suppress implementation of any of the decoders to reduce -// your code footprint by #defining one or more of the following -// symbols before creating the implementation. -// -// STBI_NO_JPEG -// STBI_NO_PNG -// STBI_NO_BMP -// STBI_NO_PSD -// STBI_NO_TGA -// STBI_NO_GIF -// STBI_NO_HDR -// STBI_NO_PIC -// STBI_NO_PNM (.ppm and .pgm) -// -// - You can request *only* certain decoders and suppress all other ones -// (this will be more forward-compatible, as addition of new decoders -// doesn't require you to disable them explicitly): -// -// STBI_ONLY_JPEG -// STBI_ONLY_PNG -// STBI_ONLY_BMP -// STBI_ONLY_PSD -// STBI_ONLY_TGA -// STBI_ONLY_GIF -// STBI_ONLY_HDR -// STBI_ONLY_PIC -// STBI_ONLY_PNM (.ppm and .pgm) -// -// - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still -// want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB -// - - -#ifndef STBI_NO_STDIO -#include -#endif // STBI_NO_STDIO - -#define STBI_VERSION 1 - -enum -{ - STBI_default = 0, // only used for desired_channels - - STBI_grey = 1, - STBI_grey_alpha = 2, - STBI_rgb = 3, - STBI_rgb_alpha = 4 -}; - -typedef unsigned char stbi_uc; -typedef unsigned short stbi_us; - -#ifdef __cplusplus -extern "C" { -#endif - -#ifdef STB_IMAGE_STATIC -#define STBIDEF static -#else -#define STBIDEF extern -#endif - - ////////////////////////////////////////////////////////////////////////////// - // - // PRIMARY API - works on images of any type - // - - // - // load image by filename, open file, or memory buffer - // - - typedef struct - { - int (*read) (void* user, char* data, int size); // fill 'data' with 'size' bytes. return number of bytes actually read - void (*skip) (void* user, int n); // skip the next 'n' bytes, or 'unget' the last -n bytes if negative - int (*eof) (void* user); // returns nonzero if we are at end of file/data - } stbi_io_callbacks; - - //////////////////////////////////// - // - // 8-bits-per-channel interface - // - - STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels); -#ifndef STBI_NO_GIF - STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp); -#endif - - -#ifndef STBI_NO_STDIO - STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels); - // for stbi_load_from_file, file pointer is left pointing immediately after image -#endif - -//////////////////////////////////// -// -// 16-bits-per-channel interface -// - - STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO - STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF stbi_us* stbi_load_from_file_16(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels); -#endif - - //////////////////////////////////// - // - // float-per-channel interface - // -#ifndef STBI_NO_LINEAR - STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels); - -#ifndef STBI_NO_STDIO - STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* channels_in_file, int desired_channels); - STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* channels_in_file, int desired_channels); -#endif -#endif - -#ifndef STBI_NO_HDR - STBIDEF void stbi_hdr_to_ldr_gamma(float gamma); - STBIDEF void stbi_hdr_to_ldr_scale(float scale); -#endif // STBI_NO_HDR - -#ifndef STBI_NO_LINEAR - STBIDEF void stbi_ldr_to_hdr_gamma(float gamma); - STBIDEF void stbi_ldr_to_hdr_scale(float scale); -#endif // STBI_NO_LINEAR - - // stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR - STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user); - STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len); -#ifndef STBI_NO_STDIO - STBIDEF int stbi_is_hdr(char const* filename); - STBIDEF int stbi_is_hdr_from_file(FILE* f); -#endif // STBI_NO_STDIO - - - // get a VERY brief reason for failure - // NOT THREADSAFE - STBIDEF const char* stbi_failure_reason(void); - - // free the loaded image -- this is just free() - STBIDEF void stbi_image_free(void* retval_from_stbi_load); - - // get image dimensions & components without fully decoding - STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp); - STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp); - STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len); - STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* clbk, void* user); - -#ifndef STBI_NO_STDIO - STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp); - STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp); - STBIDEF int stbi_is_16_bit(char const* filename); - STBIDEF int stbi_is_16_bit_from_file(FILE* f); -#endif - - - - // for image formats that explicitly notate that they have premultiplied alpha, - // we just return the colors as stored in the file. set this flag to force - // unpremultiplication. results are undefined if the unpremultiply overflow. - STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply); - - // indicate whether we should process iphone images back to canonical format, - // or just pass them through "as-is" - STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert); - - // flip the image vertically, so the first pixel in the output array is the bottom left - STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip); - - // ZLIB client - used by PNG, available for other purposes - - STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen); - STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header); - STBIDEF char* stbi_zlib_decode_malloc(const char* buffer, int len, int* outlen); - STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, const char* ibuffer, int ilen); - - STBIDEF char* stbi_zlib_decode_noheader_malloc(const char* buffer, int len, int* outlen); - STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen); - - -#ifdef __cplusplus -} -#endif - -// -// -//// end header file ///////////////////////////////////////////////////// -#endif // STBI_INCLUDE_STB_IMAGE_H - -#ifdef STB_IMAGE_IMPLEMENTATION - -#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \ - || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \ - || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \ - || defined(STBI_ONLY_ZLIB) -#ifndef STBI_ONLY_JPEG -#define STBI_NO_JPEG -#endif -#ifndef STBI_ONLY_PNG -#define STBI_NO_PNG -#endif -#ifndef STBI_ONLY_BMP -#define STBI_NO_BMP -#endif -#ifndef STBI_ONLY_PSD -#define STBI_NO_PSD -#endif -#ifndef STBI_ONLY_TGA -#define STBI_NO_TGA -#endif -#ifndef STBI_ONLY_GIF -#define STBI_NO_GIF -#endif -#ifndef STBI_ONLY_HDR -#define STBI_NO_HDR -#endif -#ifndef STBI_ONLY_PIC -#define STBI_NO_PIC -#endif -#ifndef STBI_ONLY_PNM -#define STBI_NO_PNM -#endif -#endif - -#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB) -#define STBI_NO_ZLIB -#endif - - -#include -#include // ptrdiff_t on osx -#include -#include -#include - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -#include // ldexp, pow -#endif - -#ifndef STBI_NO_STDIO -#include -#endif - -#ifndef STBI_ASSERT -#include -#define STBI_ASSERT(x) assert(x) -#endif - - -#ifndef _MSC_VER -#ifdef __cplusplus -#define stbi_inline inline -#else -#define stbi_inline -#endif -#else -#define stbi_inline __forceinline -#endif - - -#ifdef _MSC_VER -typedef unsigned short stbi__uint16; -typedef signed short stbi__int16; -typedef unsigned int stbi__uint32; -typedef signed int stbi__int32; -#else -#include -typedef uint16_t stbi__uint16; -typedef int16_t stbi__int16; -typedef uint32_t stbi__uint32; -typedef int32_t stbi__int32; -#endif - -// should produce compiler error if size is wrong -typedef unsigned char validate_uint32[sizeof(stbi__uint32) == 4 ? 1 : -1]; - -#ifdef _MSC_VER -#define STBI_NOTUSED(v) (void)(v) -#else -#define STBI_NOTUSED(v) (void)sizeof(v) -#endif - -#ifdef _MSC_VER -#define STBI_HAS_LROTL -#endif - -#ifdef STBI_HAS_LROTL -#define stbi_lrot(x,y) _lrotl(x,y) -#else -#define stbi_lrot(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) -#endif - -#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED)) -// ok -#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED) -// ok -#else -#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)." -#endif - -#ifndef STBI_MALLOC -#define STBI_MALLOC(sz) malloc(sz) -#define STBI_REALLOC(p,newsz) realloc(p,newsz) -#define STBI_FREE(p) free(p) -#endif - -#ifndef STBI_REALLOC_SIZED -#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz) -#endif - -// x86/x64 detection -#if defined(__x86_64__) || defined(_M_X64) -#define STBI__X64_TARGET -#elif defined(__i386) || defined(_M_IX86) -#define STBI__X86_TARGET -#endif - -#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD) -// gcc doesn't support sse2 intrinsics unless you compile with -msse2, -// which in turn means it gets to use SSE2 everywhere. This is unfortunate, -// but previous attempts to provide the SSE2 functions with runtime -// detection caused numerous issues. The way architecture extensions are -// exposed in GCC/Clang is, sadly, not really suited for one-file libs. -// New behavior: if compiled with -msse2, we use SSE2 without any -// detection; if not, we don't use it at all. -#define STBI_NO_SIMD -#endif - -#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD) -// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET -// -// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the -// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant. -// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not -// simultaneously enabling "-mstackrealign". -// -// See https://github.com/nothings/stb/issues/81 for more information. -// -// So default to no SSE2 on 32-bit MinGW. If you've read this far and added -// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2. -#define STBI_NO_SIMD -#endif - -#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET)) -#define STBI_SSE2 -#include - -#ifdef _MSC_VER - -#if _MSC_VER >= 1400 // not VC6 -#include // __cpuid -static int stbi__cpuid3(void) -{ - int info[4]; - __cpuid(info, 1); - return info[3]; -} -#else -static int stbi__cpuid3(void) -{ - int res; - __asm { - mov eax, 1 - cpuid - mov res, edx - } - return res; -} -#endif - -#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name - -static int stbi__sse2_available(void) -{ - int info3 = stbi__cpuid3(); - return ((info3 >> 26) & 1) != 0; -} -#else // assume GCC-style if not VC++ -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) - -static int stbi__sse2_available(void) -{ - // If we're even attempting to compile this on GCC/Clang, that means - // -msse2 is on, which means the compiler is allowed to use SSE2 - // instructions at will, and so are we. - return 1; -} -#endif -#endif - -// ARM NEON -#if defined(STBI_NO_SIMD) && defined(STBI_NEON) -#undef STBI_NEON -#endif - -#ifdef STBI_NEON -#include -// assume GCC or Clang on ARM targets -#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) -#endif - -#ifndef STBI_SIMD_ALIGN -#define STBI_SIMD_ALIGN(type, name) type name -#endif - -/////////////////////////////////////////////// -// -// stbi__context struct and start_xxx functions - -// stbi__context structure is our basic context used by all images, so it -// contains all the IO context, plus some basic image information -typedef struct -{ - stbi__uint32 img_x, img_y; - int img_n, img_out_n; - - stbi_io_callbacks io; - void* io_user_data; - - int read_from_callbacks; - int buflen; - stbi_uc buffer_start[128]; - - stbi_uc* img_buffer, * img_buffer_end; - stbi_uc* img_buffer_original, * img_buffer_original_end; -} stbi__context; - - -static void stbi__refill_buffer(stbi__context* s); - -// initialize a memory-decode context -static void stbi__start_mem(stbi__context* s, stbi_uc const* buffer, int len) -{ - s->io.read = NULL; - s->read_from_callbacks = 0; - s->img_buffer = s->img_buffer_original = (stbi_uc*)buffer; - s->img_buffer_end = s->img_buffer_original_end = (stbi_uc*)buffer + len; -} - -// initialize a callback-based context -static void stbi__start_callbacks(stbi__context* s, stbi_io_callbacks* c, void* user) -{ - s->io = *c; - s->io_user_data = user; - s->buflen = sizeof(s->buffer_start); - s->read_from_callbacks = 1; - s->img_buffer_original = s->buffer_start; - stbi__refill_buffer(s); - s->img_buffer_original_end = s->img_buffer_end; -} - -#ifndef STBI_NO_STDIO - -static int stbi__stdio_read(void* user, char* data, int size) -{ - return (int)fread(data, 1, size, (FILE*)user); -} - -static void stbi__stdio_skip(void* user, int n) -{ - fseek((FILE*)user, n, SEEK_CUR); -} - -static int stbi__stdio_eof(void* user) -{ - return feof((FILE*)user); -} - -static stbi_io_callbacks stbi__stdio_callbacks = -{ - stbi__stdio_read, - stbi__stdio_skip, - stbi__stdio_eof, -}; - -static void stbi__start_file(stbi__context* s, FILE* f) -{ - stbi__start_callbacks(s, &stbi__stdio_callbacks, (void*)f); -} - -//static void stop_file(stbi__context *s) { } - -#endif // !STBI_NO_STDIO - -static void stbi__rewind(stbi__context* s) -{ - // conceptually rewind SHOULD rewind to the beginning of the stream, - // but we just rewind to the beginning of the initial buffer, because - // we only use it after doing 'test', which only ever looks at at most 92 bytes - s->img_buffer = s->img_buffer_original; - s->img_buffer_end = s->img_buffer_original_end; -} - -enum -{ - STBI_ORDER_RGB, - STBI_ORDER_BGR -}; - -typedef struct -{ - int bits_per_channel; - int num_channels; - int channel_order; -} stbi__result_info; - -#ifndef STBI_NO_JPEG -static int stbi__jpeg_test(stbi__context* s); -static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PNG -static int stbi__png_test(stbi__context* s); -static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp); -static int stbi__png_is16(stbi__context* s); -#endif - -#ifndef STBI_NO_BMP -static int stbi__bmp_test(stbi__context* s); -static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_TGA -static int stbi__tga_test(stbi__context* s); -static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context* s); -static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc); -static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp); -static int stbi__psd_is16(stbi__context* s); -#endif - -#ifndef STBI_NO_HDR -static int stbi__hdr_test(stbi__context* s); -static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_test(stbi__context* s); -static void* stbi__pic_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_GIF -static int stbi__gif_test(stbi__context* s); -static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp); -static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -#ifndef STBI_NO_PNM -static int stbi__pnm_test(stbi__context* s); -static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri); -static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp); -#endif - -// this is not threadsafe -static const char* stbi__g_failure_reason; - -STBIDEF const char* stbi_failure_reason(void) -{ - return stbi__g_failure_reason; -} - -static int stbi__err(const char* str) -{ - stbi__g_failure_reason = str; - return 0; -} - -static void* stbi__malloc(size_t size) -{ - return STBI_MALLOC(size); -} - -// stb_image uses ints pervasively, including for offset calculations. -// therefore the largest decoded image size we can support with the -// current code, even on 64-bit targets, is INT_MAX. this is not a -// significant limitation for the intended use case. -// -// we do, however, need to make sure our size calculations don't -// overflow. hence a few helper functions for size calculations that -// multiply integers together, making sure that they're non-negative -// and no overflow occurs. - -// return 1 if the sum is valid, 0 on overflow. -// negative terms are considered invalid. -static int stbi__addsizes_valid(int a, int b) -{ - if (b < 0) return 0; - // now 0 <= b <= INT_MAX, hence also - // 0 <= INT_MAX - b <= INTMAX. - // And "a + b <= INT_MAX" (which might overflow) is the - // same as a <= INT_MAX - b (no overflow) - return a <= INT_MAX - b; -} - -// returns 1 if the product is valid, 0 on overflow. -// negative factors are considered invalid. -static int stbi__mul2sizes_valid(int a, int b) -{ - if (a < 0 || b < 0) return 0; - if (b == 0) return 1; // mul-by-0 is always safe - // portable way to check for no overflows in a*b - return a <= INT_MAX / b; -} - -// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow -static int stbi__mad2sizes_valid(int a, int b, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a * b, add); -} - -// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow -static int stbi__mad3sizes_valid(int a, int b, int c, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && - stbi__addsizes_valid(a * b * c, add); -} - -// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add) -{ - return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a * b, c) && - stbi__mul2sizes_valid(a * b * c, d) && stbi__addsizes_valid(a * b * c * d, add); -} -#endif - -// mallocs with size overflow checking -static void* stbi__malloc_mad2(int a, int b, int add) -{ - if (!stbi__mad2sizes_valid(a, b, add)) return NULL; - return stbi__malloc(a * b + add); -} - -static void* stbi__malloc_mad3(int a, int b, int c, int add) -{ - if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL; - return stbi__malloc(a * b * c + add); -} - -#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) -static void* stbi__malloc_mad4(int a, int b, int c, int d, int add) -{ - if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL; - return stbi__malloc(a * b * c * d + add); -} -#endif - -// stbi__err - error -// stbi__errpf - error returning pointer to float -// stbi__errpuc - error returning pointer to unsigned char - -#ifdef STBI_NO_FAILURE_STRINGS -#define stbi__err(x,y) 0 -#elif defined(STBI_FAILURE_USERMSG) -#define stbi__err(x,y) stbi__err(y) -#else -#define stbi__err(x,y) stbi__err(x) -#endif - -#define stbi__errpf(x,y) ((float *)(size_t) (stbi__err(x,y)?NULL:NULL)) -#define stbi__errpuc(x,y) ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL)) - -STBIDEF void stbi_image_free(void* retval_from_stbi_load) -{ - STBI_FREE(retval_from_stbi_load); -} - -#ifndef STBI_NO_LINEAR -static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp); -#endif - -#ifndef STBI_NO_HDR -static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp); -#endif - -static int stbi__vertically_flip_on_load = 0; - -STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip) -{ - stbi__vertically_flip_on_load = flag_true_if_should_flip; -} - -static void* stbi__load_main(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) -{ - memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields - ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed - ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order - ri->num_channels = 0; - -#ifndef STBI_NO_JPEG - if (stbi__jpeg_test(s)) return stbi__jpeg_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_PNG - if (stbi__png_test(s)) return stbi__png_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_BMP - if (stbi__bmp_test(s)) return stbi__bmp_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_GIF - if (stbi__gif_test(s)) return stbi__gif_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_PSD - if (stbi__psd_test(s)) return stbi__psd_load(s, x, y, comp, req_comp, ri, bpc); -#endif -#ifndef STBI_NO_PIC - if (stbi__pic_test(s)) return stbi__pic_load(s, x, y, comp, req_comp, ri); -#endif -#ifndef STBI_NO_PNM - if (stbi__pnm_test(s)) return stbi__pnm_load(s, x, y, comp, req_comp, ri); -#endif - -#ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - float* hdr = stbi__hdr_load(s, x, y, comp, req_comp, ri); - return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp); - } -#endif - -#ifndef STBI_NO_TGA - // test tga last because it's a crappy test! - if (stbi__tga_test(s)) - return stbi__tga_load(s, x, y, comp, req_comp, ri); -#endif - - return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt"); -} - -static stbi_uc* stbi__convert_16_to_8(stbi__uint16* orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi_uc* reduced; - - reduced = (stbi_uc*)stbi__malloc(img_len); - if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling - - STBI_FREE(orig); - return reduced; -} - -static stbi__uint16* stbi__convert_8_to_16(stbi_uc* orig, int w, int h, int channels) -{ - int i; - int img_len = w * h * channels; - stbi__uint16* enlarged; - - enlarged = (stbi__uint16*)stbi__malloc(img_len * 2); - if (enlarged == NULL) return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory"); - - for (i = 0; i < img_len; ++i) - enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff - - STBI_FREE(orig); - return enlarged; -} - -static void stbi__vertical_flip(void* image, int w, int h, int bytes_per_pixel) -{ - int row; - size_t bytes_per_row = (size_t)w * bytes_per_pixel; - stbi_uc temp[2048]; - stbi_uc* bytes = (stbi_uc*)image; - - for (row = 0; row < (h >> 1); row++) { - stbi_uc* row0 = bytes + row * bytes_per_row; - stbi_uc* row1 = bytes + (h - row - 1) * bytes_per_row; - // swap row0 with row1 - size_t bytes_left = bytes_per_row; - while (bytes_left) { - size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp); - memcpy(temp, row0, bytes_copy); - memcpy(row0, row1, bytes_copy); - memcpy(row1, temp, bytes_copy); - row0 += bytes_copy; - row1 += bytes_copy; - bytes_left -= bytes_copy; - } - } -} - -static void stbi__vertical_flip_slices(void* image, int w, int h, int z, int bytes_per_pixel) -{ - int slice; - int slice_size = w * h * bytes_per_pixel; - - stbi_uc* bytes = (stbi_uc*)image; - for (slice = 0; slice < z; ++slice) { - stbi__vertical_flip(bytes, w, h, bytes_per_pixel); - bytes += slice_size; - } -} - -static unsigned char* stbi__load_and_postprocess_8bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) -{ - stbi__result_info ri; - void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8); - - if (result == NULL) - return NULL; - - if (ri.bits_per_channel != 8) { - STBI_ASSERT(ri.bits_per_channel == 16); - result = stbi__convert_16_to_8((stbi__uint16*)result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 8; - } - - // @TODO: move stbi__convert_format to here - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc)); - } - - return (unsigned char*)result; -} - -static stbi__uint16* stbi__load_and_postprocess_16bit(stbi__context* s, int* x, int* y, int* comp, int req_comp) -{ - stbi__result_info ri; - void* result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16); - - if (result == NULL) - return NULL; - - if (ri.bits_per_channel != 16) { - STBI_ASSERT(ri.bits_per_channel == 8); - result = stbi__convert_8_to_16((stbi_uc*)result, *x, *y, req_comp == 0 ? *comp : req_comp); - ri.bits_per_channel = 16; - } - - // @TODO: move stbi__convert_format16 to here - // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision - - if (stbi__vertically_flip_on_load) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16)); - } - - return (stbi__uint16*)result; -} - -#if !defined(STBI_NO_HDR) || !defined(STBI_NO_LINEAR) -static void stbi__float_postprocess(float* result, int* x, int* y, int* comp, int req_comp) -{ - if (stbi__vertically_flip_on_load && result != NULL) { - int channels = req_comp ? req_comp : *comp; - stbi__vertical_flip(result, *x, *y, channels * sizeof(float)); - } -} -#endif - -#ifndef STBI_NO_STDIO - -static FILE* stbi__fopen(char const* filename, char const* mode) -{ - FILE* f; -#if defined(_MSC_VER) && _MSC_VER >= 1400 - if (0 != fopen_s(&f, filename, mode)) - f = 0; -#else - f = fopen(filename, mode); -#endif - return f; -} - - -STBIDEF stbi_uc* stbi_load(char const* filename, int* x, int* y, int* comp, int req_comp) -{ - FILE* f = stbi__fopen(filename, "rb"); - unsigned char* result; - if (!f) return stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file(f, x, y, comp, req_comp); - fclose(f); - return result; -} - -STBIDEF stbi_uc* stbi_load_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) -{ - unsigned char* result; - stbi__context s; - stbi__start_file(&s, f); - result = stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi__uint16* stbi_load_from_file_16(FILE* f, int* x, int* y, int* comp, int req_comp) -{ - stbi__uint16* result; - stbi__context s; - stbi__start_file(&s, f); - result = stbi__load_and_postprocess_16bit(&s, x, y, comp, req_comp); - if (result) { - // need to 'unget' all the characters in the IO buffer - fseek(f, -(int)(s.img_buffer_end - s.img_buffer), SEEK_CUR); - } - return result; -} - -STBIDEF stbi_us* stbi_load_16(char const* filename, int* x, int* y, int* comp, int req_comp) -{ - FILE* f = stbi__fopen(filename, "rb"); - stbi__uint16* result; - if (!f) return (stbi_us*)stbi__errpuc("can't fopen", "Unable to open file"); - result = stbi_load_from_file_16(f, x, y, comp, req_comp); - fclose(f); - return result; -} - - -#endif //!STBI_NO_STDIO - -STBIDEF stbi_us* stbi_load_16_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); -} - -STBIDEF stbi_us* stbi_load_16_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* channels_in_file, int desired_channels) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__load_and_postprocess_16bit(&s, x, y, channels_in_file, desired_channels); -} - -STBIDEF stbi_uc* stbi_load_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); -} - -STBIDEF stbi_uc* stbi_load_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__load_and_postprocess_8bit(&s, x, y, comp, req_comp); -} - -#ifndef STBI_NO_GIF -STBIDEF stbi_uc* stbi_load_gif_from_memory(stbi_uc const* buffer, int len, int** delays, int* x, int* y, int* z, int* comp, int req_comp) -{ - unsigned char* result; - stbi__context s; - stbi__start_mem(&s, buffer, len); - - result = (unsigned char*)stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp); - if (stbi__vertically_flip_on_load) { - stbi__vertical_flip_slices(result, *x, *y, *z, *comp); - } - - return result; -} -#endif - -#ifndef STBI_NO_LINEAR -static float* stbi__loadf_main(stbi__context* s, int* x, int* y, int* comp, int req_comp) -{ - unsigned char* data; -#ifndef STBI_NO_HDR - if (stbi__hdr_test(s)) { - stbi__result_info ri; - float* hdr_data = stbi__hdr_load(s, x, y, comp, req_comp, &ri); - if (hdr_data) - stbi__float_postprocess(hdr_data, x, y, comp, req_comp); - return hdr_data; - } -#endif - data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp); - if (data) - return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp); - return stbi__errpf("unknown image type", "Image not of any known type, or corrupt"); -} - -STBIDEF float* stbi_loadf_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__loadf_main(&s, x, y, comp, req_comp); -} - -STBIDEF float* stbi_loadf_from_callbacks(stbi_io_callbacks const* clbk, void* user, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__loadf_main(&s, x, y, comp, req_comp); -} - -#ifndef STBI_NO_STDIO -STBIDEF float* stbi_loadf(char const* filename, int* x, int* y, int* comp, int req_comp) -{ - float* result; - FILE* f = stbi__fopen(filename, "rb"); - if (!f) return stbi__errpf("can't fopen", "Unable to open file"); - result = stbi_loadf_from_file(f, x, y, comp, req_comp); - fclose(f); - return result; -} - -STBIDEF float* stbi_loadf_from_file(FILE* f, int* x, int* y, int* comp, int req_comp) -{ - stbi__context s; - stbi__start_file(&s, f); - return stbi__loadf_main(&s, x, y, comp, req_comp); -} -#endif // !STBI_NO_STDIO - -#endif // !STBI_NO_LINEAR - -// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is -// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always -// reports false! - -STBIDEF int stbi_is_hdr_from_memory(stbi_uc const* buffer, int len) -{ -#ifndef STBI_NO_HDR - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__hdr_test(&s); -#else - STBI_NOTUSED(buffer); - STBI_NOTUSED(len); - return 0; -#endif -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_is_hdr(char const* filename) -{ - FILE* f = stbi__fopen(filename, "rb"); - int result = 0; - if (f) { - result = stbi_is_hdr_from_file(f); - fclose(f); - } - return result; -} - -STBIDEF int stbi_is_hdr_from_file(FILE* f) -{ -#ifndef STBI_NO_HDR - long pos = ftell(f); - int res; - stbi__context s; - stbi__start_file(&s, f); - res = stbi__hdr_test(&s); - fseek(f, pos, SEEK_SET); - return res; -#else - STBI_NOTUSED(f); - return 0; -#endif -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_is_hdr_from_callbacks(stbi_io_callbacks const* clbk, void* user) -{ -#ifndef STBI_NO_HDR - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)clbk, user); - return stbi__hdr_test(&s); -#else - STBI_NOTUSED(clbk); - STBI_NOTUSED(user); - return 0; -#endif -} - -#ifndef STBI_NO_LINEAR -static float stbi__l2h_gamma = 2.2f, stbi__l2h_scale = 1.0f; - -STBIDEF void stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; } -STBIDEF void stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; } -#endif - -static float stbi__h2l_gamma_i = 1.0f / 2.2f, stbi__h2l_scale_i = 1.0f; - -STBIDEF void stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1 / gamma; } -STBIDEF void stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1 / scale; } - - -////////////////////////////////////////////////////////////////////////////// -// -// Common code used by all image loaders -// - -enum -{ - STBI__SCAN_load = 0, - STBI__SCAN_type, - STBI__SCAN_header -}; - -static void stbi__refill_buffer(stbi__context* s) -{ - int n = (s->io.read)(s->io_user_data, (char*)s->buffer_start, s->buflen); - if (n == 0) { - // at end of file, treat same as if from memory, but need to handle case - // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file - s->read_from_callbacks = 0; - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start + 1; - *s->img_buffer = 0; - } - else { - s->img_buffer = s->buffer_start; - s->img_buffer_end = s->buffer_start + n; - } -} - -stbi_inline static stbi_uc stbi__get8(stbi__context* s) -{ - if (s->img_buffer < s->img_buffer_end) - return *s->img_buffer++; - if (s->read_from_callbacks) { - stbi__refill_buffer(s); - return *s->img_buffer++; - } - return 0; -} - -stbi_inline static int stbi__at_eof(stbi__context* s) -{ - if (s->io.read) { - if (!(s->io.eof)(s->io_user_data)) return 0; - // if feof() is true, check if buffer = end - // special case: we've only got the special 0 character at the end - if (s->read_from_callbacks == 0) return 1; - } - - return s->img_buffer >= s->img_buffer_end; -} - -static void stbi__skip(stbi__context* s, int n) -{ - if (n < 0) { - s->img_buffer = s->img_buffer_end; - return; - } - if (s->io.read) { - int blen = (int)(s->img_buffer_end - s->img_buffer); - if (blen < n) { - s->img_buffer = s->img_buffer_end; - (s->io.skip)(s->io_user_data, n - blen); - return; - } - } - s->img_buffer += n; -} - -static int stbi__getn(stbi__context* s, stbi_uc* buffer, int n) -{ - if (s->io.read) { - int blen = (int)(s->img_buffer_end - s->img_buffer); - if (blen < n) { - int res, count; - - memcpy(buffer, s->img_buffer, blen); - - count = (s->io.read)(s->io_user_data, (char*)buffer + blen, n - blen); - res = (count == (n - blen)); - s->img_buffer = s->img_buffer_end; - return res; - } - } - - if (s->img_buffer + n <= s->img_buffer_end) { - memcpy(buffer, s->img_buffer, n); - s->img_buffer += n; - return 1; - } - else - return 0; -} - -static int stbi__get16be(stbi__context* s) -{ - int z = stbi__get8(s); - return (z << 8) + stbi__get8(s); -} - -static stbi__uint32 stbi__get32be(stbi__context* s) -{ - stbi__uint32 z = stbi__get16be(s); - return (z << 16) + stbi__get16be(s); -} - -#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) -// nothing -#else -static int stbi__get16le(stbi__context* s) -{ - int z = stbi__get8(s); - return z + (stbi__get8(s) << 8); -} -#endif - -#ifndef STBI_NO_BMP -static stbi__uint32 stbi__get32le(stbi__context* s) -{ - stbi__uint32 z = stbi__get16le(s); - return z + (stbi__get16le(s) << 16); -} -#endif - -#define STBI__BYTECAST(x) ((stbi_uc) ((x) & 255)) // truncate int to byte without warnings - - -////////////////////////////////////////////////////////////////////////////// -// -// generic converter from built-in img_n to req_comp -// individual types do this automatically as much as possible (e.g. jpeg -// does all cases internally since it needs to colorspace convert anyway, -// and it never has alpha, so very few cases ). png can automatically -// interleave an alpha=255 channel, but falls back to this for other cases -// -// assume data buffer is malloced, so malloc a new one and free that one -// only failure mode is malloc failing - -static stbi_uc stbi__compute_y(int r, int g, int b) -{ - return (stbi_uc)(((r * 77) + (g * 150) + (29 * b)) >> 8); -} - -static unsigned char* stbi__convert_format(unsigned char* data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i, j; - unsigned char* good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (unsigned char*)stbi__malloc_mad3(req_comp, x, y, 0); - if (good == NULL) { - STBI_FREE(data); - return stbi__errpuc("outofmem", "Out of memory"); - } - - for (j = 0; j < (int)y; ++j) { - unsigned char* src = data + j * x * img_n; - unsigned char* dest = good + j * x * req_comp; - -#define STBI__COMBO(a,b) ((a)*8+(b)) -#define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1, 2) { dest[0] = src[0], dest[1] = 255; } break; - STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(1, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = 255; } break; - STBI__CASE(2, 1) { dest[0] = src[0]; } break; - STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(2, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = src[1]; } break; - STBI__CASE(3, 4) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2], dest[3] = 255; } break; - STBI__CASE(3, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } break; - STBI__CASE(3, 2) { dest[0] = stbi__compute_y(src[0], src[1], src[2]), dest[1] = 255; } break; - STBI__CASE(4, 1) { dest[0] = stbi__compute_y(src[0], src[1], src[2]); } break; - STBI__CASE(4, 2) { dest[0] = stbi__compute_y(src[0], src[1], src[2]), dest[1] = src[3]; } break; - STBI__CASE(4, 3) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2]; } break; - default: STBI_ASSERT(0); - } -#undef STBI__CASE - } - - STBI_FREE(data); - return good; -} - -static stbi__uint16 stbi__compute_y_16(int r, int g, int b) -{ - return (stbi__uint16)(((r * 77) + (g * 150) + (29 * b)) >> 8); -} - -static stbi__uint16* stbi__convert_format16(stbi__uint16* data, int img_n, int req_comp, unsigned int x, unsigned int y) -{ - int i, j; - stbi__uint16* good; - - if (req_comp == img_n) return data; - STBI_ASSERT(req_comp >= 1 && req_comp <= 4); - - good = (stbi__uint16*)stbi__malloc(req_comp * x * y * 2); - if (good == NULL) { - STBI_FREE(data); - return (stbi__uint16*)stbi__errpuc("outofmem", "Out of memory"); - } - - for (j = 0; j < (int)y; ++j) { - stbi__uint16* src = data + j * x * img_n; - stbi__uint16* dest = good + j * x * req_comp; - -#define STBI__COMBO(a,b) ((a)*8+(b)) -#define STBI__CASE(a,b) case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b) - // convert source image with img_n components to one with req_comp components; - // avoid switch per pixel, so use switch per scanline and massive macros - switch (STBI__COMBO(img_n, req_comp)) { - STBI__CASE(1, 2) { dest[0] = src[0], dest[1] = 0xffff; } break; - STBI__CASE(1, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(1, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = 0xffff; } break; - STBI__CASE(2, 1) { dest[0] = src[0]; } break; - STBI__CASE(2, 3) { dest[0] = dest[1] = dest[2] = src[0]; } break; - STBI__CASE(2, 4) { dest[0] = dest[1] = dest[2] = src[0], dest[3] = src[1]; } break; - STBI__CASE(3, 4) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2], dest[3] = 0xffff; } break; - STBI__CASE(3, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } break; - STBI__CASE(3, 2) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]), dest[1] = 0xffff; } break; - STBI__CASE(4, 1) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]); } break; - STBI__CASE(4, 2) { dest[0] = stbi__compute_y_16(src[0], src[1], src[2]), dest[1] = src[3]; } break; - STBI__CASE(4, 3) { dest[0] = src[0], dest[1] = src[1], dest[2] = src[2]; } break; - default: STBI_ASSERT(0); - } -#undef STBI__CASE - } - - STBI_FREE(data); - return good; -} - -#ifndef STBI_NO_LINEAR -static float* stbi__ldr_to_hdr(stbi_uc* data, int x, int y, int comp) -{ - int i, k, n; - float* output; - if (!data) return NULL; - output = (float*)stbi__malloc_mad4(x, y, comp, sizeof(float), 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp - 1; - for (i = 0; i < x * y; ++i) { - for (k = 0; k < n; ++k) { - output[i * comp + k] = (float)(pow(data[i * comp + k] / 255.0f, stbi__l2h_gamma) * stbi__l2h_scale); - } - if (k < comp) output[i * comp + k] = data[i * comp + k] / 255.0f; - } - STBI_FREE(data); - return output; -} -#endif - -#ifndef STBI_NO_HDR -#define stbi__float2int(x) ((int) (x)) -static stbi_uc* stbi__hdr_to_ldr(float* data, int x, int y, int comp) -{ - int i, k, n; - stbi_uc* output; - if (!data) return NULL; - output = (stbi_uc*)stbi__malloc_mad3(x, y, comp, 0); - if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); } - // compute number of non-alpha components - if (comp & 1) n = comp; else n = comp - 1; - for (i = 0; i < x * y; ++i) { - for (k = 0; k < n; ++k) { - float z = (float)pow(data[i * comp + k] * stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i * comp + k] = (stbi_uc)stbi__float2int(z); - } - if (k < comp) { - float z = data[i * comp + k] * 255 + 0.5f; - if (z < 0) z = 0; - if (z > 255) z = 255; - output[i * comp + k] = (stbi_uc)stbi__float2int(z); - } - } - STBI_FREE(data); - return output; -} -#endif - -////////////////////////////////////////////////////////////////////////////// -// -// "baseline" JPEG/JFIF decoder -// -// simple implementation -// - doesn't support delayed output of y-dimension -// - simple interface (only one output format: 8-bit interleaved RGB) -// - doesn't try to recover corrupt jpegs -// - doesn't allow partial loading, loading multiple at once -// - still fast on x86 (copying globals into locals doesn't help x86) -// - allocates lots of intermediate memory (full size of all components) -// - non-interleaved case requires this anyway -// - allows good upsampling (see next) -// high-quality -// - upsampled channels are bilinearly interpolated, even across blocks -// - quality integer IDCT derived from IJG's 'slow' -// performance -// - fast huffman; reasonable integer IDCT -// - some SIMD kernels for common paths on targets with SSE2/NEON -// - uses a lot of intermediate memory, could cache poorly - -#ifndef STBI_NO_JPEG - -// huffman decoding acceleration -#define FAST_BITS 9 // larger handles more cases; smaller stomps less cache - -typedef struct -{ - stbi_uc fast[1 << FAST_BITS]; - // weirdly, repacking this into AoS is a 10% speed loss, instead of a win - stbi__uint16 code[256]; - stbi_uc values[256]; - stbi_uc size[257]; - unsigned int maxcode[18]; - int delta[17]; // old 'firstsymbol' - old 'firstcode' -} stbi__huffman; - -typedef struct -{ - stbi__context* s; - stbi__huffman huff_dc[4]; - stbi__huffman huff_ac[4]; - stbi__uint16 dequant[4][64]; - stbi__int16 fast_ac[4][1 << FAST_BITS]; - - // sizes for components, interleaved MCUs - int img_h_max, img_v_max; - int img_mcu_x, img_mcu_y; - int img_mcu_w, img_mcu_h; - - // definition of jpeg image component - struct - { - int id; - int h, v; - int tq; - int hd, ha; - int dc_pred; - - int x, y, w2, h2; - stbi_uc* data; - void* raw_data, * raw_coeff; - stbi_uc* linebuf; - short* coeff; // progressive only - int coeff_w, coeff_h; // number of 8x8 coefficient blocks - } img_comp[4]; - - stbi__uint32 code_buffer; // jpeg entropy-coded buffer - int code_bits; // number of valid bits - unsigned char marker; // marker seen while filling entropy buffer - int nomore; // flag if we saw a marker so must stop - - int progressive; - int spec_start; - int spec_end; - int succ_high; - int succ_low; - int eob_run; - int jfif; - int app14_color_transform; // Adobe APP14 tag - int rgb; - - int scan_n, order[4]; - int restart_interval, todo; - - // kernels - void (*idct_block_kernel)(stbi_uc* out, int out_stride, short data[64]); - void (*YCbCr_to_RGB_kernel)(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step); - stbi_uc* (*resample_row_hv_2_kernel)(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs); -} stbi__jpeg; - -static int stbi__build_huffman(stbi__huffman* h, int* count) -{ - int i, j, k = 0; - unsigned int code; - // build size list for each symbol (from JPEG spec) - for (i = 0; i < 16; ++i) - for (j = 0; j < count[i]; ++j) - h->size[k++] = (stbi_uc)(i + 1); - h->size[k] = 0; - - // compute actual symbols (from jpeg spec) - code = 0; - k = 0; - for (j = 1; j <= 16; ++j) { - // compute delta to add to code to compute symbol id - h->delta[j] = k - code; - if (h->size[k] == j) { - while (h->size[k] == j) - h->code[k++] = (stbi__uint16)(code++); - if (code - 1 >= (1u << j)) return stbi__err("bad code lengths", "Corrupt JPEG"); - } - // compute largest code + 1 for this size, preshifted as needed later - h->maxcode[j] = code << (16 - j); - code <<= 1; - } - h->maxcode[j] = 0xffffffff; - - // build non-spec acceleration table; 255 is flag for not-accelerated - memset(h->fast, 255, 1 << FAST_BITS); - for (i = 0; i < k; ++i) { - int s = h->size[i]; - if (s <= FAST_BITS) { - int c = h->code[i] << (FAST_BITS - s); - int m = 1 << (FAST_BITS - s); - for (j = 0; j < m; ++j) { - h->fast[c + j] = (stbi_uc)i; - } - } - } - return 1; -} - -// build a table that decodes both magnitude and value of small ACs in -// one go. -static void stbi__build_fast_ac(stbi__int16* fast_ac, stbi__huffman* h) -{ - int i; - for (i = 0; i < (1 << FAST_BITS); ++i) { - stbi_uc fast = h->fast[i]; - fast_ac[i] = 0; - if (fast < 255) { - int rs = h->values[fast]; - int run = (rs >> 4) & 15; - int magbits = rs & 15; - int len = h->size[fast]; - - if (magbits && len + magbits <= FAST_BITS) { - // magnitude code followed by receive_extend code - int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits); - int m = 1 << (magbits - 1); - if (k < m) k += (~0U << magbits) + 1; - // if the result is small enough, we can fit it in fast_ac table - if (k >= -128 && k <= 127) - fast_ac[i] = (stbi__int16)((k * 256) + (run * 16) + (len + magbits)); - } - } - } -} - -static void stbi__grow_buffer_unsafe(stbi__jpeg* j) -{ - do { - unsigned int b = j->nomore ? 0 : stbi__get8(j->s); - if (b == 0xff) { - int c = stbi__get8(j->s); - while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes - if (c != 0) { - j->marker = (unsigned char)c; - j->nomore = 1; - return; - } - } - j->code_buffer |= b << (24 - j->code_bits); - j->code_bits += 8; - } while (j->code_bits <= 24); -} - -// (1 << n) - 1 -static const stbi__uint32 stbi__bmask[17] = { 0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535 }; - -// decode a jpeg huffman value from the bitstream -stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg* j, stbi__huffman* h) -{ - unsigned int temp; - int c, k; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - // look at the top FAST_BITS and determine what symbol ID it is, - // if the code is <= FAST_BITS - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); - k = h->fast[c]; - if (k < 255) { - int s = h->size[k]; - if (s > j->code_bits) - return -1; - j->code_buffer <<= s; - j->code_bits -= s; - return h->values[k]; - } - - // naive test is to shift the code_buffer down so k bits are - // valid, then test against maxcode. To speed this up, we've - // preshifted maxcode left so that it has (16-k) 0s at the - // end; in other words, regardless of the number of bits, it - // wants to be compared against something shifted to have 16; - // that way we don't need to shift inside the loop. - temp = j->code_buffer >> 16; - for (k = FAST_BITS + 1; ; ++k) - if (temp < h->maxcode[k]) - break; - if (k == 17) { - // error! code not found - j->code_bits -= 16; - return -1; - } - - if (k > j->code_bits) - return -1; - - // convert the huffman code to the symbol id - c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k]; - STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]); - - // convert the id to a symbol - j->code_bits -= k; - j->code_buffer <<= k; - return h->values[c]; -} - -// bias[n] = (-1<code_bits < n) stbi__grow_buffer_unsafe(j); - - sgn = (stbi__int32)j->code_buffer >> 31; // sign bit is always in MSB - k = stbi_lrot(j->code_buffer, n); - STBI_ASSERT(n >= 0 && n < (int)(sizeof(stbi__bmask) / sizeof(*stbi__bmask))); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k + (stbi__jbias[n] & ~sgn); -} - -// get some unsigned bits -stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg* j, int n) -{ - unsigned int k; - if (j->code_bits < n) stbi__grow_buffer_unsafe(j); - k = stbi_lrot(j->code_buffer, n); - j->code_buffer = k & ~stbi__bmask[n]; - k &= stbi__bmask[n]; - j->code_bits -= n; - return k; -} - -stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg* j) -{ - unsigned int k; - if (j->code_bits < 1) stbi__grow_buffer_unsafe(j); - k = j->code_buffer; - j->code_buffer <<= 1; - --j->code_bits; - return k & 0x80000000; -} - -// given a value that's at position X in the zigzag stream, -// where does it appear in the 8x8 matrix coded as row-major? -static const stbi_uc stbi__jpeg_dezigzag[64 + 15] = -{ - 0, 1, 8, 16, 9, 2, 3, 10, - 17, 24, 32, 25, 18, 11, 4, 5, - 12, 19, 26, 33, 40, 48, 41, 34, - 27, 20, 13, 6, 7, 14, 21, 28, - 35, 42, 49, 56, 57, 50, 43, 36, - 29, 22, 15, 23, 30, 37, 44, 51, - 58, 59, 52, 45, 38, 31, 39, 46, - 53, 60, 61, 54, 47, 55, 62, 63, - // let corrupt input sample past end - 63, 63, 63, 63, 63, 63, 63, 63, - 63, 63, 63, 63, 63, 63, 63 -}; - -// decode one 64-entry block-- -static int stbi__jpeg_decode_block(stbi__jpeg* j, short data[64], stbi__huffman* hdc, stbi__huffman* hac, stbi__int16* fac, int b, stbi__uint16* dequant) -{ - int diff, dc, k; - int t; - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - t = stbi__jpeg_huff_decode(j, hdc); - if (t < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - - // 0 all the ac values now so we can do it 32-bits at a time - memset(data, 0, 64 * sizeof(data[0])); - - diff = t ? stbi__extend_receive(j, t) : 0; - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short)(dc * dequant[0]); - - // decode AC components, see JPEG spec - k = 1; - do { - unsigned int zig; - int c, r, s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)((r >> 8) * dequant[zig]); - } - else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (rs != 0xf0) break; // end block - k += 16; - } - else { - k += r; - // decode into unzigzag'd location - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)(stbi__extend_receive(j, s) * dequant[zig]); - } - } - } while (k < 64); - return 1; -} - -static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg* j, short data[64], stbi__huffman* hdc, int b) -{ - int diff, dc; - int t; - if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - - if (j->succ_high == 0) { - // first scan for DC coefficient, must be first - memset(data, 0, 64 * sizeof(data[0])); // 0 all the ac values now - t = stbi__jpeg_huff_decode(j, hdc); - diff = t ? stbi__extend_receive(j, t) : 0; - - dc = j->img_comp[b].dc_pred + diff; - j->img_comp[b].dc_pred = dc; - data[0] = (short)(dc << j->succ_low); - } - else { - // refinement scan for DC coefficient - if (stbi__jpeg_get_bit(j)) - data[0] += (short)(1 << j->succ_low); - } - return 1; -} - -// @OPTIMIZE: store non-zigzagged during the decode passes, -// and only de-zigzag when dequantizing -static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg* j, short data[64], stbi__huffman* hac, stbi__int16* fac) -{ - int k; - if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG"); - - if (j->succ_high == 0) { - int shift = j->succ_low; - - if (j->eob_run) { - --j->eob_run; - return 1; - } - - k = j->spec_start; - do { - unsigned int zig; - int c, r, s; - if (j->code_bits < 16) stbi__grow_buffer_unsafe(j); - c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS) - 1); - r = fac[c]; - if (r) { // fast-AC path - k += (r >> 4) & 15; // run - s = r & 15; // combined length - j->code_buffer <<= s; - j->code_bits -= s; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)((r >> 8) << shift); - } - else { - int rs = stbi__jpeg_huff_decode(j, hac); - if (rs < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r); - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - --j->eob_run; - break; - } - k += 16; - } - else { - k += r; - zig = stbi__jpeg_dezigzag[k++]; - data[zig] = (short)(stbi__extend_receive(j, s) << shift); - } - } - } while (k <= j->spec_end); - } - else { - // refinement scan for these AC coefficients - - short bit = (short)(1 << j->succ_low); - - if (j->eob_run) { - --j->eob_run; - for (k = j->spec_start; k <= j->spec_end; ++k) { - short* p = &data[stbi__jpeg_dezigzag[k]]; - if (*p != 0) - if (stbi__jpeg_get_bit(j)) - if ((*p & bit) == 0) { - if (*p > 0) - * p += bit; - else - *p -= bit; - } - } - } - else { - k = j->spec_start; - do { - int r, s; - int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh - if (rs < 0) return stbi__err("bad huffman code", "Corrupt JPEG"); - s = rs & 15; - r = rs >> 4; - if (s == 0) { - if (r < 15) { - j->eob_run = (1 << r) - 1; - if (r) - j->eob_run += stbi__jpeg_get_bits(j, r); - r = 64; // force end of block - } - else { - // r=15 s=0 should write 16 0s, so we just do - // a run of 15 0s and then write s (which is 0), - // so we don't have to do anything special here - } - } - else { - if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG"); - // sign bit - if (stbi__jpeg_get_bit(j)) - s = bit; - else - s = -bit; - } - - // advance by r - while (k <= j->spec_end) { - short* p = &data[stbi__jpeg_dezigzag[k++]]; - if (*p != 0) { - if (stbi__jpeg_get_bit(j)) - if ((*p & bit) == 0) { - if (*p > 0) - * p += bit; - else - *p -= bit; - } - } - else { - if (r == 0) { - *p = (short)s; - break; - } - --r; - } - } - } while (k <= j->spec_end); - } - } - return 1; -} - -// take a -128..127 value and stbi__clamp it and convert to 0..255 -stbi_inline static stbi_uc stbi__clamp(int x) -{ - // trick to use a single test to catch both cases - if ((unsigned int)x > 255) { - if (x < 0) return 0; - if (x > 255) return 255; - } - return (stbi_uc)x; -} - -#define stbi__f2f(x) ((int) (((x) * 4096 + 0.5))) -#define stbi__fsh(x) ((x) * 4096) - -// derived from jidctint -- DCT_ISLOW -#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \ - int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \ - p2 = s2; \ - p3 = s6; \ - p1 = (p2+p3) * stbi__f2f(0.5411961f); \ - t2 = p1 + p3*stbi__f2f(-1.847759065f); \ - t3 = p1 + p2*stbi__f2f( 0.765366865f); \ - p2 = s0; \ - p3 = s4; \ - t0 = stbi__fsh(p2+p3); \ - t1 = stbi__fsh(p2-p3); \ - x0 = t0+t3; \ - x3 = t0-t3; \ - x1 = t1+t2; \ - x2 = t1-t2; \ - t0 = s7; \ - t1 = s5; \ - t2 = s3; \ - t3 = s1; \ - p3 = t0+t2; \ - p4 = t1+t3; \ - p1 = t0+t3; \ - p2 = t1+t2; \ - p5 = (p3+p4)*stbi__f2f( 1.175875602f); \ - t0 = t0*stbi__f2f( 0.298631336f); \ - t1 = t1*stbi__f2f( 2.053119869f); \ - t2 = t2*stbi__f2f( 3.072711026f); \ - t3 = t3*stbi__f2f( 1.501321110f); \ - p1 = p5 + p1*stbi__f2f(-0.899976223f); \ - p2 = p5 + p2*stbi__f2f(-2.562915447f); \ - p3 = p3*stbi__f2f(-1.961570560f); \ - p4 = p4*stbi__f2f(-0.390180644f); \ - t3 += p1+p4; \ - t2 += p2+p3; \ - t1 += p2+p4; \ - t0 += p1+p3; - -static void stbi__idct_block(stbi_uc* out, int out_stride, short data[64]) -{ - int i, val[64], * v = val; - stbi_uc* o; - short* d = data; - - // columns - for (i = 0; i < 8; ++i, ++d, ++v) { - // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing - if (d[8] == 0 && d[16] == 0 && d[24] == 0 && d[32] == 0 - && d[40] == 0 && d[48] == 0 && d[56] == 0) { - // no shortcut 0 seconds - // (1|2|3|4|5|6|7)==0 0 seconds - // all separate -0.047 seconds - // 1 && 2|3 && 4|5 && 6|7: -0.047 seconds - int dcterm = d[0] * 4; - v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm; - } - else { - STBI__IDCT_1D(d[0], d[8], d[16], d[24], d[32], d[40], d[48], d[56]) - // constants scaled things up by 1<<12; let's bring them back - // down, but keep 2 extra bits of precision - x0 += 512; x1 += 512; x2 += 512; x3 += 512; - v[0] = (x0 + t3) >> 10; - v[56] = (x0 - t3) >> 10; - v[8] = (x1 + t2) >> 10; - v[48] = (x1 - t2) >> 10; - v[16] = (x2 + t1) >> 10; - v[40] = (x2 - t1) >> 10; - v[24] = (x3 + t0) >> 10; - v[32] = (x3 - t0) >> 10; - } - } - - for (i = 0, v = val, o = out; i < 8; ++i, v += 8, o += out_stride) { - // no fast case since the first 1D IDCT spread components out - STBI__IDCT_1D(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]) - // constants scaled things up by 1<<12, plus we had 1<<2 from first - // loop, plus horizontal and vertical each scale by sqrt(8) so together - // we've got an extra 1<<3, so 1<<17 total we need to remove. - // so we want to round that, which means adding 0.5 * 1<<17, - // aka 65536. Also, we'll end up with -128 to 127 that we want - // to encode as 0..255 by adding 128, so we'll add that before the shift - x0 += 65536 + (128 << 17); - x1 += 65536 + (128 << 17); - x2 += 65536 + (128 << 17); - x3 += 65536 + (128 << 17); - // tried computing the shifts into temps, or'ing the temps to see - // if any were out of range, but that was slower - o[0] = stbi__clamp((x0 + t3) >> 17); - o[7] = stbi__clamp((x0 - t3) >> 17); - o[1] = stbi__clamp((x1 + t2) >> 17); - o[6] = stbi__clamp((x1 - t2) >> 17); - o[2] = stbi__clamp((x2 + t1) >> 17); - o[5] = stbi__clamp((x2 - t1) >> 17); - o[3] = stbi__clamp((x3 + t0) >> 17); - o[4] = stbi__clamp((x3 - t0) >> 17); - } -} - -#ifdef STBI_SSE2 -// sse2 integer IDCT. not the fastest possible implementation but it -// produces bit-identical results to the generic C version so it's -// fully "transparent". -static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) -{ - // This is constructed to match our regular (generic) integer IDCT exactly. - __m128i row0, row1, row2, row3, row4, row5, row6, row7; - __m128i tmp; - - // dot product constant: even elems=x, odd elems=y -#define dct_const(x,y) _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y)) - -// out(0) = c0[even]*x + c0[odd]*y (c0, x, y 16-bit, out 32-bit) -// out(1) = c1[even]*x + c1[odd]*y -#define dct_rot(out0,out1, x,y,c0,c1) \ - __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \ - __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \ - __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \ - __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \ - __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \ - __m128i out1##_h = _mm_madd_epi16(c0##hi, c1) - - // out = in << 12 (in 16-bit, out 32-bit) -#define dct_widen(out, in) \ - __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \ - __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4) - - // wide add -#define dct_wadd(out, a, b) \ - __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_add_epi32(a##_h, b##_h) - - // wide sub -#define dct_wsub(out, a, b) \ - __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \ - __m128i out##_h = _mm_sub_epi32(a##_h, b##_h) - - // butterfly a/b, add bias, then shift by "s" and pack -#define dct_bfly32o(out0, out1, a,b,bias,s) \ - { \ - __m128i abiased_l = _mm_add_epi32(a##_l, bias); \ - __m128i abiased_h = _mm_add_epi32(a##_h, bias); \ - dct_wadd(sum, abiased, b); \ - dct_wsub(dif, abiased, b); \ - out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \ - out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \ - } - - // 8-bit interleave step (for transposes) -#define dct_interleave8(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi8(a, b); \ - b = _mm_unpackhi_epi8(tmp, b) - - // 16-bit interleave step (for transposes) -#define dct_interleave16(a, b) \ - tmp = a; \ - a = _mm_unpacklo_epi16(a, b); \ - b = _mm_unpackhi_epi16(tmp, b) - -#define dct_pass(bias,shift) \ - { \ - /* even part */ \ - dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \ - __m128i sum04 = _mm_add_epi16(row0, row4); \ - __m128i dif04 = _mm_sub_epi16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \ - dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \ - __m128i sum17 = _mm_add_epi16(row1, row7); \ - __m128i sum35 = _mm_add_epi16(row3, row5); \ - dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \ - dct_wadd(x4, y0o, y4o); \ - dct_wadd(x5, y1o, y5o); \ - dct_wadd(x6, y2o, y5o); \ - dct_wadd(x7, y3o, y4o); \ - dct_bfly32o(row0,row7, x0,x7,bias,shift); \ - dct_bfly32o(row1,row6, x1,x6,bias,shift); \ - dct_bfly32o(row2,row5, x2,x5,bias,shift); \ - dct_bfly32o(row3,row4, x3,x4,bias,shift); \ - } - - __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f)); - __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f(0.765366865f), stbi__f2f(0.5411961f)); - __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f)); - __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f)); - __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f(0.298631336f), stbi__f2f(-1.961570560f)); - __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f(3.072711026f)); - __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f(2.053119869f), stbi__f2f(-0.390180644f)); - __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f(1.501321110f)); - - // rounding biases in column/row passes, see stbi__idct_block for explanation. - __m128i bias_0 = _mm_set1_epi32(512); - __m128i bias_1 = _mm_set1_epi32(65536 + (128 << 17)); - - // load - row0 = _mm_load_si128((const __m128i*) (data + 0 * 8)); - row1 = _mm_load_si128((const __m128i*) (data + 1 * 8)); - row2 = _mm_load_si128((const __m128i*) (data + 2 * 8)); - row3 = _mm_load_si128((const __m128i*) (data + 3 * 8)); - row4 = _mm_load_si128((const __m128i*) (data + 4 * 8)); - row5 = _mm_load_si128((const __m128i*) (data + 5 * 8)); - row6 = _mm_load_si128((const __m128i*) (data + 6 * 8)); - row7 = _mm_load_si128((const __m128i*) (data + 7 * 8)); - - // column pass - dct_pass(bias_0, 10); - - { - // 16bit 8x8 transpose pass 1 - dct_interleave16(row0, row4); - dct_interleave16(row1, row5); - dct_interleave16(row2, row6); - dct_interleave16(row3, row7); - - // transpose pass 2 - dct_interleave16(row0, row2); - dct_interleave16(row1, row3); - dct_interleave16(row4, row6); - dct_interleave16(row5, row7); - - // transpose pass 3 - dct_interleave16(row0, row1); - dct_interleave16(row2, row3); - dct_interleave16(row4, row5); - dct_interleave16(row6, row7); - } - - // row pass - dct_pass(bias_1, 17); - - { - // pack - __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7 - __m128i p1 = _mm_packus_epi16(row2, row3); - __m128i p2 = _mm_packus_epi16(row4, row5); - __m128i p3 = _mm_packus_epi16(row6, row7); - - // 8bit 8x8 transpose pass 1 - dct_interleave8(p0, p2); // a0e0a1e1... - dct_interleave8(p1, p3); // c0g0c1g1... - - // transpose pass 2 - dct_interleave8(p0, p1); // a0c0e0g0... - dct_interleave8(p2, p3); // b0d0f0h0... - - // transpose pass 3 - dct_interleave8(p0, p2); // a0b0c0d0... - dct_interleave8(p1, p3); // a4b4c4d4... - - // store - _mm_storel_epi64((__m128i*) out, p0); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i*) out, p2); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i*) out, p1); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride; - _mm_storel_epi64((__m128i*) out, p3); out += out_stride; - _mm_storel_epi64((__m128i*) out, _mm_shuffle_epi32(p3, 0x4e)); - } - -#undef dct_const -#undef dct_rot -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_interleave8 -#undef dct_interleave16 -#undef dct_pass -} - -#endif // STBI_SSE2 - -#ifdef STBI_NEON - -// NEON integer IDCT. should produce bit-identical -// results to the generic C version. -static void stbi__idct_simd(stbi_uc* out, int out_stride, short data[64]) -{ - int16x8_t row0, row1, row2, row3, row4, row5, row6, row7; - - int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f)); - int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f)); - int16x4_t rot0_2 = vdup_n_s16(stbi__f2f(0.765366865f)); - int16x4_t rot1_0 = vdup_n_s16(stbi__f2f(1.175875602f)); - int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f)); - int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f)); - int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f)); - int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f)); - int16x4_t rot3_0 = vdup_n_s16(stbi__f2f(0.298631336f)); - int16x4_t rot3_1 = vdup_n_s16(stbi__f2f(2.053119869f)); - int16x4_t rot3_2 = vdup_n_s16(stbi__f2f(3.072711026f)); - int16x4_t rot3_3 = vdup_n_s16(stbi__f2f(1.501321110f)); - -#define dct_long_mul(out, inq, coeff) \ - int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff) - -#define dct_long_mac(out, acc, inq, coeff) \ - int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \ - int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff) - -#define dct_widen(out, inq) \ - int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \ - int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12) - - // wide add -#define dct_wadd(out, a, b) \ - int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vaddq_s32(a##_h, b##_h) - -// wide sub -#define dct_wsub(out, a, b) \ - int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \ - int32x4_t out##_h = vsubq_s32(a##_h, b##_h) - -// butterfly a/b, then shift using "shiftop" by "s" and pack -#define dct_bfly32o(out0,out1, a,b,shiftop,s) \ - { \ - dct_wadd(sum, a, b); \ - dct_wsub(dif, a, b); \ - out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \ - out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \ - } - -#define dct_pass(shiftop, shift) \ - { \ - /* even part */ \ - int16x8_t sum26 = vaddq_s16(row2, row6); \ - dct_long_mul(p1e, sum26, rot0_0); \ - dct_long_mac(t2e, p1e, row6, rot0_1); \ - dct_long_mac(t3e, p1e, row2, rot0_2); \ - int16x8_t sum04 = vaddq_s16(row0, row4); \ - int16x8_t dif04 = vsubq_s16(row0, row4); \ - dct_widen(t0e, sum04); \ - dct_widen(t1e, dif04); \ - dct_wadd(x0, t0e, t3e); \ - dct_wsub(x3, t0e, t3e); \ - dct_wadd(x1, t1e, t2e); \ - dct_wsub(x2, t1e, t2e); \ - /* odd part */ \ - int16x8_t sum15 = vaddq_s16(row1, row5); \ - int16x8_t sum17 = vaddq_s16(row1, row7); \ - int16x8_t sum35 = vaddq_s16(row3, row5); \ - int16x8_t sum37 = vaddq_s16(row3, row7); \ - int16x8_t sumodd = vaddq_s16(sum17, sum35); \ - dct_long_mul(p5o, sumodd, rot1_0); \ - dct_long_mac(p1o, p5o, sum17, rot1_1); \ - dct_long_mac(p2o, p5o, sum35, rot1_2); \ - dct_long_mul(p3o, sum37, rot2_0); \ - dct_long_mul(p4o, sum15, rot2_1); \ - dct_wadd(sump13o, p1o, p3o); \ - dct_wadd(sump24o, p2o, p4o); \ - dct_wadd(sump23o, p2o, p3o); \ - dct_wadd(sump14o, p1o, p4o); \ - dct_long_mac(x4, sump13o, row7, rot3_0); \ - dct_long_mac(x5, sump24o, row5, rot3_1); \ - dct_long_mac(x6, sump23o, row3, rot3_2); \ - dct_long_mac(x7, sump14o, row1, rot3_3); \ - dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \ - dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \ - dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \ - dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \ - } - - // load - row0 = vld1q_s16(data + 0 * 8); - row1 = vld1q_s16(data + 1 * 8); - row2 = vld1q_s16(data + 2 * 8); - row3 = vld1q_s16(data + 3 * 8); - row4 = vld1q_s16(data + 4 * 8); - row5 = vld1q_s16(data + 5 * 8); - row6 = vld1q_s16(data + 6 * 8); - row7 = vld1q_s16(data + 7 * 8); - - // add DC bias - row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0)); - - // column pass - dct_pass(vrshrn_n_s32, 10); - - // 16bit 8x8 transpose - { - // these three map to a single VTRN.16, VTRN.32, and VSWP, respectively. - // whether compilers actually get this is another story, sadly. -#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); } -#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); } - - // pass 1 - dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6 - dct_trn16(row2, row3); - dct_trn16(row4, row5); - dct_trn16(row6, row7); - - // pass 2 - dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4 - dct_trn32(row1, row3); - dct_trn32(row4, row6); - dct_trn32(row5, row7); - - // pass 3 - dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0 - dct_trn64(row1, row5); - dct_trn64(row2, row6); - dct_trn64(row3, row7); - -#undef dct_trn16 -#undef dct_trn32 -#undef dct_trn64 - } - - // row pass - // vrshrn_n_s32 only supports shifts up to 16, we need - // 17. so do a non-rounding shift of 16 first then follow - // up with a rounding shift by 1. - dct_pass(vshrn_n_s32, 16); - - { - // pack and round - uint8x8_t p0 = vqrshrun_n_s16(row0, 1); - uint8x8_t p1 = vqrshrun_n_s16(row1, 1); - uint8x8_t p2 = vqrshrun_n_s16(row2, 1); - uint8x8_t p3 = vqrshrun_n_s16(row3, 1); - uint8x8_t p4 = vqrshrun_n_s16(row4, 1); - uint8x8_t p5 = vqrshrun_n_s16(row5, 1); - uint8x8_t p6 = vqrshrun_n_s16(row6, 1); - uint8x8_t p7 = vqrshrun_n_s16(row7, 1); - - // again, these can translate into one instruction, but often don't. -#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; } -#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); } -#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); } - - // sadly can't use interleaved stores here since we only write - // 8 bytes to each scan line! - - // 8x8 8-bit transpose pass 1 - dct_trn8_8(p0, p1); - dct_trn8_8(p2, p3); - dct_trn8_8(p4, p5); - dct_trn8_8(p6, p7); - - // pass 2 - dct_trn8_16(p0, p2); - dct_trn8_16(p1, p3); - dct_trn8_16(p4, p6); - dct_trn8_16(p5, p7); - - // pass 3 - dct_trn8_32(p0, p4); - dct_trn8_32(p1, p5); - dct_trn8_32(p2, p6); - dct_trn8_32(p3, p7); - - // store - vst1_u8(out, p0); out += out_stride; - vst1_u8(out, p1); out += out_stride; - vst1_u8(out, p2); out += out_stride; - vst1_u8(out, p3); out += out_stride; - vst1_u8(out, p4); out += out_stride; - vst1_u8(out, p5); out += out_stride; - vst1_u8(out, p6); out += out_stride; - vst1_u8(out, p7); - -#undef dct_trn8_8 -#undef dct_trn8_16 -#undef dct_trn8_32 - } - -#undef dct_long_mul -#undef dct_long_mac -#undef dct_widen -#undef dct_wadd -#undef dct_wsub -#undef dct_bfly32o -#undef dct_pass -} - -#endif // STBI_NEON - -#define STBI__MARKER_none 0xff -// if there's a pending marker from the entropy stream, return that -// otherwise, fetch from the stream and get a marker. if there's no -// marker, return 0xff, which is never a valid marker value -static stbi_uc stbi__get_marker(stbi__jpeg * j) -{ - stbi_uc x; - if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; } - x = stbi__get8(j->s); - if (x != 0xff) return STBI__MARKER_none; - while (x == 0xff) - x = stbi__get8(j->s); // consume repeated 0xff fill bytes - return x; -} - -// in each scan, we'll have scan_n components, and the order -// of the components is specified by order[] -#define STBI__RESTART(x) ((x) >= 0xd0 && (x) <= 0xd7) - -// after a restart interval, stbi__jpeg_reset the entropy decoder and -// the dc prediction -static void stbi__jpeg_reset(stbi__jpeg* j) -{ - j->code_bits = 0; - j->code_buffer = 0; - j->nomore = 0; - j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0; - j->marker = STBI__MARKER_none; - j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff; - j->eob_run = 0; - // no more than 1<<31 MCUs if no restart_interal? that's plenty safe, - // since we don't even allow 1<<30 pixels -} - -static int stbi__parse_entropy_coded_data(stbi__jpeg* z) -{ - stbi__jpeg_reset(z); - if (!z->progressive) { - if (z->scan_n == 1) { - int i, j; - STBI_SIMD_ALIGN(short, data[64]); - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x + 7) >> 3; - int h = (z->img_comp[n].y + 7) >> 3; - for (j = 0; j < h; ++j) { - for (i = 0; i < w; ++i) { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - // if it's NOT a restart, then just bail, so we get corrupt data - // rather than no data - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - else { // interleaved - int i, j, k, x, y; - STBI_SIMD_ALIGN(short, data[64]); - for (j = 0; j < z->img_mcu_y; ++j) { - for (i = 0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k = 0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y = 0; y < z->img_comp[n].v; ++y) { - for (x = 0; x < z->img_comp[n].h; ++x) { - int x2 = (i * z->img_comp[n].h + x) * 8; - int y2 = (j * z->img_comp[n].v + y) * 8; - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block(z, data, z->huff_dc + z->img_comp[n].hd, z->huff_ac + ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0; - z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * y2 + x2, z->img_comp[n].w2, data); - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } - else { - if (z->scan_n == 1) { - int i, j; - int n = z->order[0]; - // non-interleaved data, we just need to process one block at a time, - // in trivial scanline order - // number of blocks to do just depends on how many actual "pixels" this - // component has, independent of interleaved MCU blocking and such - int w = (z->img_comp[n].x + 7) >> 3; - int h = (z->img_comp[n].y + 7) >> 3; - for (j = 0; j < h; ++j) { - for (i = 0; i < w; ++i) { - short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - if (z->spec_start == 0) { - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } - else { - int ha = z->img_comp[n].ha; - if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha])) - return 0; - } - // every data block is an MCU, so countdown the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - else { // interleaved - int i, j, k, x, y; - for (j = 0; j < z->img_mcu_y; ++j) { - for (i = 0; i < z->img_mcu_x; ++i) { - // scan an interleaved mcu... process scan_n components in order - for (k = 0; k < z->scan_n; ++k) { - int n = z->order[k]; - // scan out an mcu's worth of this component; that's just determined - // by the basic H and V specified for the component - for (y = 0; y < z->img_comp[n].v; ++y) { - for (x = 0; x < z->img_comp[n].h; ++x) { - int x2 = (i * z->img_comp[n].h + x); - int y2 = (j * z->img_comp[n].v + y); - short* data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w); - if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n)) - return 0; - } - } - } - // after all interleaved components, that's an interleaved MCU, - // so now count down the restart interval - if (--z->todo <= 0) { - if (z->code_bits < 24) stbi__grow_buffer_unsafe(z); - if (!STBI__RESTART(z->marker)) return 1; - stbi__jpeg_reset(z); - } - } - } - return 1; - } - } -} - -static void stbi__jpeg_dequantize(short* data, stbi__uint16* dequant) -{ - int i; - for (i = 0; i < 64; ++i) - data[i] *= dequant[i]; -} - -static void stbi__jpeg_finish(stbi__jpeg* z) -{ - if (z->progressive) { - // dequantize and idct the data - int i, j, n; - for (n = 0; n < z->s->img_n; ++n) { - int w = (z->img_comp[n].x + 7) >> 3; - int h = (z->img_comp[n].y + 7) >> 3; - for (j = 0; j < h; ++j) { - for (i = 0; i < w; ++i) { - short* data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w); - stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]); - z->idct_block_kernel(z->img_comp[n].data + z->img_comp[n].w2 * j * 8 + i * 8, z->img_comp[n].w2, data); - } - } - } - } -} - -static int stbi__process_marker(stbi__jpeg* z, int m) -{ - int L; - switch (m) { - case STBI__MARKER_none: // no marker found - return stbi__err("expected marker", "Corrupt JPEG"); - - case 0xDD: // DRI - specify restart interval - if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len", "Corrupt JPEG"); - z->restart_interval = stbi__get16be(z->s); - return 1; - - case 0xDB: // DQT - define quantization table - L = stbi__get16be(z->s) - 2; - while (L > 0) { - int q = stbi__get8(z->s); - int p = q >> 4, sixteen = (p != 0); - int t = q & 15, i; - if (p != 0 && p != 1) return stbi__err("bad DQT type", "Corrupt JPEG"); - if (t > 3) return stbi__err("bad DQT table", "Corrupt JPEG"); - - for (i = 0; i < 64; ++i) - z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s)); - L -= (sixteen ? 129 : 65); - } - return L == 0; - - case 0xC4: // DHT - define huffman table - L = stbi__get16be(z->s) - 2; - while (L > 0) { - stbi_uc* v; - int sizes[16], i, n = 0; - int q = stbi__get8(z->s); - int tc = q >> 4; - int th = q & 15; - if (tc > 1 || th > 3) return stbi__err("bad DHT header", "Corrupt JPEG"); - for (i = 0; i < 16; ++i) { - sizes[i] = stbi__get8(z->s); - n += sizes[i]; - } - L -= 17; - if (tc == 0) { - if (!stbi__build_huffman(z->huff_dc + th, sizes)) return 0; - v = z->huff_dc[th].values; - } - else { - if (!stbi__build_huffman(z->huff_ac + th, sizes)) return 0; - v = z->huff_ac[th].values; - } - for (i = 0; i < n; ++i) - v[i] = stbi__get8(z->s); - if (tc != 0) - stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th); - L -= n; - } - return L == 0; - } - - // check for comment block or APP blocks - if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) { - L = stbi__get16be(z->s); - if (L < 2) { - if (m == 0xFE) - return stbi__err("bad COM len", "Corrupt JPEG"); - else - return stbi__err("bad APP len", "Corrupt JPEG"); - } - L -= 2; - - if (m == 0xE0 && L >= 5) { // JFIF APP0 segment - static const unsigned char tag[5] = { 'J','F','I','F','\0' }; - int ok = 1; - int i; - for (i = 0; i < 5; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 5; - if (ok) - z->jfif = 1; - } - else if (m == 0xEE && L >= 12) { // Adobe APP14 segment - static const unsigned char tag[6] = { 'A','d','o','b','e','\0' }; - int ok = 1; - int i; - for (i = 0; i < 6; ++i) - if (stbi__get8(z->s) != tag[i]) - ok = 0; - L -= 6; - if (ok) { - stbi__get8(z->s); // version - stbi__get16be(z->s); // flags0 - stbi__get16be(z->s); // flags1 - z->app14_color_transform = stbi__get8(z->s); // color transform - L -= 6; - } - } - - stbi__skip(z->s, L); - return 1; - } - - return stbi__err("unknown marker", "Corrupt JPEG"); -} - -// after we see SOS -static int stbi__process_scan_header(stbi__jpeg* z) -{ - int i; - int Ls = stbi__get16be(z->s); - z->scan_n = stbi__get8(z->s); - if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int)z->s->img_n) return stbi__err("bad SOS component count", "Corrupt JPEG"); - if (Ls != 6 + 2 * z->scan_n) return stbi__err("bad SOS len", "Corrupt JPEG"); - for (i = 0; i < z->scan_n; ++i) { - int id = stbi__get8(z->s), which; - int q = stbi__get8(z->s); - for (which = 0; which < z->s->img_n; ++which) - if (z->img_comp[which].id == id) - break; - if (which == z->s->img_n) return 0; // no match - z->img_comp[which].hd = q >> 4; if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff", "Corrupt JPEG"); - z->img_comp[which].ha = q & 15; if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff", "Corrupt JPEG"); - z->order[i] = which; - } - - { - int aa; - z->spec_start = stbi__get8(z->s); - z->spec_end = stbi__get8(z->s); // should be 63, but might be 0 - aa = stbi__get8(z->s); - z->succ_high = (aa >> 4); - z->succ_low = (aa & 15); - if (z->progressive) { - if (z->spec_start > 63 || z->spec_end > 63 || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13) - return stbi__err("bad SOS", "Corrupt JPEG"); - } - else { - if (z->spec_start != 0) return stbi__err("bad SOS", "Corrupt JPEG"); - if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS", "Corrupt JPEG"); - z->spec_end = 63; - } - } - - return 1; -} - -static int stbi__free_jpeg_components(stbi__jpeg* z, int ncomp, int why) -{ - int i; - for (i = 0; i < ncomp; ++i) { - if (z->img_comp[i].raw_data) { - STBI_FREE(z->img_comp[i].raw_data); - z->img_comp[i].raw_data = NULL; - z->img_comp[i].data = NULL; - } - if (z->img_comp[i].raw_coeff) { - STBI_FREE(z->img_comp[i].raw_coeff); - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].coeff = 0; - } - if (z->img_comp[i].linebuf) { - STBI_FREE(z->img_comp[i].linebuf); - z->img_comp[i].linebuf = NULL; - } - } - return why; -} - -static int stbi__process_frame_header(stbi__jpeg* z, int scan) -{ - stbi__context* s = z->s; - int Lf, p, i, q, h_max = 1, v_max = 1, c; - Lf = stbi__get16be(s); if (Lf < 11) return stbi__err("bad SOF len", "Corrupt JPEG"); // JPEG - p = stbi__get8(s); if (p != 8) return stbi__err("only 8-bit", "JPEG format not supported: 8-bit only"); // JPEG baseline - s->img_y = stbi__get16be(s); if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG - s->img_x = stbi__get16be(s); if (s->img_x == 0) return stbi__err("0 width", "Corrupt JPEG"); // JPEG requires - c = stbi__get8(s); - if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count", "Corrupt JPEG"); - s->img_n = c; - for (i = 0; i < c; ++i) { - z->img_comp[i].data = NULL; - z->img_comp[i].linebuf = NULL; - } - - if (Lf != 8 + 3 * s->img_n) return stbi__err("bad SOF len", "Corrupt JPEG"); - - z->rgb = 0; - for (i = 0; i < s->img_n; ++i) { - static const unsigned char rgb[3] = { 'R', 'G', 'B' }; - z->img_comp[i].id = stbi__get8(s); - if (s->img_n == 3 && z->img_comp[i].id == rgb[i]) - ++z->rgb; - q = stbi__get8(s); - z->img_comp[i].h = (q >> 4); if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H", "Corrupt JPEG"); - z->img_comp[i].v = q & 15; if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V", "Corrupt JPEG"); - z->img_comp[i].tq = stbi__get8(s); if (z->img_comp[i].tq > 3) return stbi__err("bad TQ", "Corrupt JPEG"); - } - - if (scan != STBI__SCAN_load) return 1; - - if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode"); - - for (i = 0; i < s->img_n; ++i) { - if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h; - if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v; - } - - // compute interleaved mcu info - z->img_h_max = h_max; - z->img_v_max = v_max; - z->img_mcu_w = h_max * 8; - z->img_mcu_h = v_max * 8; - // these sizes can't be more than 17 bits - z->img_mcu_x = (s->img_x + z->img_mcu_w - 1) / z->img_mcu_w; - z->img_mcu_y = (s->img_y + z->img_mcu_h - 1) / z->img_mcu_h; - - for (i = 0; i < s->img_n; ++i) { - // number of effective pixels (e.g. for non-interleaved MCU) - z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max - 1) / h_max; - z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max - 1) / v_max; - // to simplify generation, we'll allocate enough memory to decode - // the bogus oversized data from using interleaved MCUs and their - // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't - // discard the extra data until colorspace conversion - // - // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier) - // so these muls can't overflow with 32-bit ints (which we require) - z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8; - z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8; - z->img_comp[i].coeff = 0; - z->img_comp[i].raw_coeff = 0; - z->img_comp[i].linebuf = NULL; - z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15); - if (z->img_comp[i].raw_data == NULL) - return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); - // align blocks for idct using mmx/sse - z->img_comp[i].data = (stbi_uc*)(((size_t)z->img_comp[i].raw_data + 15) & ~15); - if (z->progressive) { - // w2, h2 are multiples of 8 (see above) - z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8; - z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8; - z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15); - if (z->img_comp[i].raw_coeff == NULL) - return stbi__free_jpeg_components(z, i + 1, stbi__err("outofmem", "Out of memory")); - z->img_comp[i].coeff = (short*)(((size_t)z->img_comp[i].raw_coeff + 15) & ~15); - } - } - - return 1; -} - -// use comparisons since in some cases we handle more than one case (e.g. SOF) -#define stbi__DNL(x) ((x) == 0xdc) -#define stbi__SOI(x) ((x) == 0xd8) -#define stbi__EOI(x) ((x) == 0xd9) -#define stbi__SOF(x) ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2) -#define stbi__SOS(x) ((x) == 0xda) - -#define stbi__SOF_progressive(x) ((x) == 0xc2) - -static int stbi__decode_jpeg_header(stbi__jpeg* z, int scan) -{ - int m; - z->jfif = 0; - z->app14_color_transform = -1; // valid values are 0,1,2 - z->marker = STBI__MARKER_none; // initialize cached marker to empty - m = stbi__get_marker(z); - if (!stbi__SOI(m)) return stbi__err("no SOI", "Corrupt JPEG"); - if (scan == STBI__SCAN_type) return 1; - m = stbi__get_marker(z); - while (!stbi__SOF(m)) { - if (!stbi__process_marker(z, m)) return 0; - m = stbi__get_marker(z); - while (m == STBI__MARKER_none) { - // some files have extra padding after their blocks, so ok, we'll scan - if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG"); - m = stbi__get_marker(z); - } - } - z->progressive = stbi__SOF_progressive(m); - if (!stbi__process_frame_header(z, scan)) return 0; - return 1; -} - -// decode image to YCbCr format -static int stbi__decode_jpeg_image(stbi__jpeg* j) -{ - int m; - for (m = 0; m < 4; m++) { - j->img_comp[m].raw_data = NULL; - j->img_comp[m].raw_coeff = NULL; - } - j->restart_interval = 0; - if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0; - m = stbi__get_marker(j); - while (!stbi__EOI(m)) { - if (stbi__SOS(m)) { - if (!stbi__process_scan_header(j)) return 0; - if (!stbi__parse_entropy_coded_data(j)) return 0; - if (j->marker == STBI__MARKER_none) { - // handle 0s at the end of image data from IP Kamera 9060 - while (!stbi__at_eof(j->s)) { - int x = stbi__get8(j->s); - if (x == 255) { - j->marker = stbi__get8(j->s); - break; - } - } - // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0 - } - } - else if (stbi__DNL(m)) { - int Ld = stbi__get16be(j->s); - stbi__uint32 NL = stbi__get16be(j->s); - if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG"); - if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG"); - } - else { - if (!stbi__process_marker(j, m)) return 0; - } - m = stbi__get_marker(j); - } - if (j->progressive) - stbi__jpeg_finish(j); - return 1; -} - -// static jfif-centered resampling (across block boundaries) - -typedef stbi_uc* (*resample_row_func)(stbi_uc* out, stbi_uc* in0, stbi_uc* in1, - int w, int hs); - -#define stbi__div4(x) ((stbi_uc) ((x) >> 2)) - -static stbi_uc* resample_row_1(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - STBI_NOTUSED(out); - STBI_NOTUSED(in_far); - STBI_NOTUSED(w); - STBI_NOTUSED(hs); - return in_near; -} - -static stbi_uc* stbi__resample_row_v_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate two samples vertically for every one in input - int i; - STBI_NOTUSED(hs); - for (i = 0; i < w; ++i) - out[i] = stbi__div4(3 * in_near[i] + in_far[i] + 2); - return out; -} - -static stbi_uc* stbi__resample_row_h_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate two samples horizontally for every one in input - int i; - stbi_uc* input = in_near; - - if (w == 1) { - // if only one sample, can't do any interpolation - out[0] = out[1] = input[0]; - return out; - } - - out[0] = input[0]; - out[1] = stbi__div4(input[0] * 3 + input[1] + 2); - for (i = 1; i < w - 1; ++i) { - int n = 3 * input[i] + 2; - out[i * 2 + 0] = stbi__div4(n + input[i - 1]); - out[i * 2 + 1] = stbi__div4(n + input[i + 1]); - } - out[i * 2 + 0] = stbi__div4(input[w - 2] * 3 + input[w - 1] + 2); - out[i * 2 + 1] = input[w - 1]; - - STBI_NOTUSED(in_far); - STBI_NOTUSED(hs); - - return out; -} - -#define stbi__div16(x) ((stbi_uc) ((x) >> 4)) - -static stbi_uc* stbi__resample_row_hv_2(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i, t0, t1; - if (w == 1) { - out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3 * in_near[0] + in_far[0]; - out[0] = stbi__div4(t1 + 2); - for (i = 1; i < w; ++i) { - t0 = t1; - t1 = 3 * in_near[i] + in_far[i]; - out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); - out[i * 2] = stbi__div16(3 * t1 + t0 + 8); - } - out[w * 2 - 1] = stbi__div4(t1 + 2); - - STBI_NOTUSED(hs); - - return out; -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static stbi_uc* stbi__resample_row_hv_2_simd(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // need to generate 2x2 samples for every one in input - int i = 0, t0, t1; - - if (w == 1) { - out[0] = out[1] = stbi__div4(3 * in_near[0] + in_far[0] + 2); - return out; - } - - t1 = 3 * in_near[0] + in_far[0]; - // process groups of 8 pixels for as long as we can. - // note we can't handle the last pixel in a row in this loop - // because we need to handle the filter boundary conditions. - for (; i < ((w - 1) & ~7); i += 8) { -#if defined(STBI_SSE2) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - __m128i zero = _mm_setzero_si128(); - __m128i farb = _mm_loadl_epi64((__m128i*) (in_far + i)); - __m128i nearb = _mm_loadl_epi64((__m128i*) (in_near + i)); - __m128i farw = _mm_unpacklo_epi8(farb, zero); - __m128i nearw = _mm_unpacklo_epi8(nearb, zero); - __m128i diff = _mm_sub_epi16(farw, nearw); - __m128i nears = _mm_slli_epi16(nearw, 2); - __m128i curr = _mm_add_epi16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - __m128i prv0 = _mm_slli_si128(curr, 2); - __m128i nxt0 = _mm_srli_si128(curr, 2); - __m128i prev = _mm_insert_epi16(prv0, t1, 0); - __m128i next = _mm_insert_epi16(nxt0, 3 * in_near[i + 8] + in_far[i + 8], 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - __m128i bias = _mm_set1_epi16(8); - __m128i curs = _mm_slli_epi16(curr, 2); - __m128i prvd = _mm_sub_epi16(prev, curr); - __m128i nxtd = _mm_sub_epi16(next, curr); - __m128i curb = _mm_add_epi16(curs, bias); - __m128i even = _mm_add_epi16(prvd, curb); - __m128i odd = _mm_add_epi16(nxtd, curb); - - // interleave even and odd pixels, then undo scaling. - __m128i int0 = _mm_unpacklo_epi16(even, odd); - __m128i int1 = _mm_unpackhi_epi16(even, odd); - __m128i de0 = _mm_srli_epi16(int0, 4); - __m128i de1 = _mm_srli_epi16(int1, 4); - - // pack and write output - __m128i outv = _mm_packus_epi16(de0, de1); - _mm_storeu_si128((__m128i*) (out + i * 2), outv); -#elif defined(STBI_NEON) - // load and perform the vertical filtering pass - // this uses 3*x + y = 4*x + (y - x) - uint8x8_t farb = vld1_u8(in_far + i); - uint8x8_t nearb = vld1_u8(in_near + i); - int16x8_t diff = vreinterpretq_s16_u16(vsubl_u8(farb, nearb)); - int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2)); - int16x8_t curr = vaddq_s16(nears, diff); // current row - - // horizontal filter works the same based on shifted vers of current - // row. "prev" is current row shifted right by 1 pixel; we need to - // insert the previous pixel value (from t1). - // "next" is current row shifted left by 1 pixel, with first pixel - // of next block of 8 pixels added in. - int16x8_t prv0 = vextq_s16(curr, curr, 7); - int16x8_t nxt0 = vextq_s16(curr, curr, 1); - int16x8_t prev = vsetq_lane_s16(t1, prv0, 0); - int16x8_t next = vsetq_lane_s16(3 * in_near[i + 8] + in_far[i + 8], nxt0, 7); - - // horizontal filter, polyphase implementation since it's convenient: - // even pixels = 3*cur + prev = cur*4 + (prev - cur) - // odd pixels = 3*cur + next = cur*4 + (next - cur) - // note the shared term. - int16x8_t curs = vshlq_n_s16(curr, 2); - int16x8_t prvd = vsubq_s16(prev, curr); - int16x8_t nxtd = vsubq_s16(next, curr); - int16x8_t even = vaddq_s16(curs, prvd); - int16x8_t odd = vaddq_s16(curs, nxtd); - - // undo scaling and round, then store with even/odd phases interleaved - uint8x8x2_t o; - o.val[0] = vqrshrun_n_s16(even, 4); - o.val[1] = vqrshrun_n_s16(odd, 4); - vst2_u8(out + i * 2, o); -#endif - - // "previous" value for next iter - t1 = 3 * in_near[i + 7] + in_far[i + 7]; - } - - t0 = t1; - t1 = 3 * in_near[i] + in_far[i]; - out[i * 2] = stbi__div16(3 * t1 + t0 + 8); - - for (++i; i < w; ++i) { - t0 = t1; - t1 = 3 * in_near[i] + in_far[i]; - out[i * 2 - 1] = stbi__div16(3 * t0 + t1 + 8); - out[i * 2] = stbi__div16(3 * t1 + t0 + 8); - } - out[w * 2 - 1] = stbi__div4(t1 + 2); - - STBI_NOTUSED(hs); - - return out; -} -#endif - -static stbi_uc* stbi__resample_row_generic(stbi_uc* out, stbi_uc* in_near, stbi_uc* in_far, int w, int hs) -{ - // resample with nearest-neighbor - int i, j; - STBI_NOTUSED(in_far); - for (i = 0; i < w; ++i) - for (j = 0; j < hs; ++j) - out[i * hs + j] = in_near[i]; - return out; -} - -// this is a reduced-precision calculation of YCbCr-to-RGB introduced -// to make sure the code produces the same results in both SIMD and scalar -#define stbi__float2fixed(x) (((int) ((x) * 4096.0f + 0.5f)) << 8) -static void stbi__YCbCr_to_RGB_row(stbi_uc* out, const stbi_uc* y, const stbi_uc* pcb, const stbi_uc* pcr, int count, int step) -{ - int i; - for (i = 0; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1 << 19); // rounding - int r, g, b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr * stbi__float2fixed(1.40200f); - g = y_fixed + (cr * -stbi__float2fixed(0.71414f)) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb * stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned)r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned)g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned)b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} - -#if defined(STBI_SSE2) || defined(STBI_NEON) -static void stbi__YCbCr_to_RGB_simd(stbi_uc* out, stbi_uc const* y, stbi_uc const* pcb, stbi_uc const* pcr, int count, int step) -{ - int i = 0; - -#ifdef STBI_SSE2 - // step == 3 is pretty ugly on the final interleave, and i'm not convinced - // it's useful in practice (you wouldn't use it for textures, for example). - // so just accelerate step == 4 case. - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - __m128i signflip = _mm_set1_epi8(-0x80); - __m128i cr_const0 = _mm_set1_epi16((short)(1.40200f * 4096.0f + 0.5f)); - __m128i cr_const1 = _mm_set1_epi16(-(short)(0.71414f * 4096.0f + 0.5f)); - __m128i cb_const0 = _mm_set1_epi16(-(short)(0.34414f * 4096.0f + 0.5f)); - __m128i cb_const1 = _mm_set1_epi16((short)(1.77200f * 4096.0f + 0.5f)); - __m128i y_bias = _mm_set1_epi8((char)(unsigned char)128); - __m128i xw = _mm_set1_epi16(255); // alpha channel - - for (; i + 7 < count; i += 8) { - // load - __m128i y_bytes = _mm_loadl_epi64((__m128i*) (y + i)); - __m128i cr_bytes = _mm_loadl_epi64((__m128i*) (pcr + i)); - __m128i cb_bytes = _mm_loadl_epi64((__m128i*) (pcb + i)); - __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128 - __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128 - - // unpack to short (and left-shift cr, cb by 8) - __m128i yw = _mm_unpacklo_epi8(y_bias, y_bytes); - __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased); - __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased); - - // color transform - __m128i yws = _mm_srli_epi16(yw, 4); - __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw); - __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw); - __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1); - __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1); - __m128i rws = _mm_add_epi16(cr0, yws); - __m128i gwt = _mm_add_epi16(cb0, yws); - __m128i bws = _mm_add_epi16(yws, cb1); - __m128i gws = _mm_add_epi16(gwt, cr1); - - // descale - __m128i rw = _mm_srai_epi16(rws, 4); - __m128i bw = _mm_srai_epi16(bws, 4); - __m128i gw = _mm_srai_epi16(gws, 4); - - // back to byte, set up for transpose - __m128i brb = _mm_packus_epi16(rw, bw); - __m128i gxb = _mm_packus_epi16(gw, xw); - - // transpose to interleave channels - __m128i t0 = _mm_unpacklo_epi8(brb, gxb); - __m128i t1 = _mm_unpackhi_epi8(brb, gxb); - __m128i o0 = _mm_unpacklo_epi16(t0, t1); - __m128i o1 = _mm_unpackhi_epi16(t0, t1); - - // store - _mm_storeu_si128((__m128i*) (out + 0), o0); - _mm_storeu_si128((__m128i*) (out + 16), o1); - out += 32; - } - } -#endif - -#ifdef STBI_NEON - // in this version, step=3 support would be easy to add. but is there demand? - if (step == 4) { - // this is a fairly straightforward implementation and not super-optimized. - uint8x8_t signflip = vdup_n_u8(0x80); - int16x8_t cr_const0 = vdupq_n_s16((short)(1.40200f * 4096.0f + 0.5f)); - int16x8_t cr_const1 = vdupq_n_s16(-(short)(0.71414f * 4096.0f + 0.5f)); - int16x8_t cb_const0 = vdupq_n_s16(-(short)(0.34414f * 4096.0f + 0.5f)); - int16x8_t cb_const1 = vdupq_n_s16((short)(1.77200f * 4096.0f + 0.5f)); - - for (; i + 7 < count; i += 8) { - // load - uint8x8_t y_bytes = vld1_u8(y + i); - uint8x8_t cr_bytes = vld1_u8(pcr + i); - uint8x8_t cb_bytes = vld1_u8(pcb + i); - int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip)); - int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip)); - - // expand to s16 - int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4)); - int16x8_t crw = vshll_n_s8(cr_biased, 7); - int16x8_t cbw = vshll_n_s8(cb_biased, 7); - - // color transform - int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0); - int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0); - int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1); - int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1); - int16x8_t rws = vaddq_s16(yws, cr0); - int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1); - int16x8_t bws = vaddq_s16(yws, cb1); - - // undo scaling, round, convert to byte - uint8x8x4_t o; - o.val[0] = vqrshrun_n_s16(rws, 4); - o.val[1] = vqrshrun_n_s16(gws, 4); - o.val[2] = vqrshrun_n_s16(bws, 4); - o.val[3] = vdup_n_u8(255); - - // store, interleaving r/g/b/a - vst4_u8(out, o); - out += 8 * 4; - } - } -#endif - - for (; i < count; ++i) { - int y_fixed = (y[i] << 20) + (1 << 19); // rounding - int r, g, b; - int cr = pcr[i] - 128; - int cb = pcb[i] - 128; - r = y_fixed + cr * stbi__float2fixed(1.40200f); - g = y_fixed + cr * -stbi__float2fixed(0.71414f) + ((cb * -stbi__float2fixed(0.34414f)) & 0xffff0000); - b = y_fixed + cb * stbi__float2fixed(1.77200f); - r >>= 20; - g >>= 20; - b >>= 20; - if ((unsigned)r > 255) { if (r < 0) r = 0; else r = 255; } - if ((unsigned)g > 255) { if (g < 0) g = 0; else g = 255; } - if ((unsigned)b > 255) { if (b < 0) b = 0; else b = 255; } - out[0] = (stbi_uc)r; - out[1] = (stbi_uc)g; - out[2] = (stbi_uc)b; - out[3] = 255; - out += step; - } -} -#endif - -// set up the kernels -static void stbi__setup_jpeg(stbi__jpeg* j) -{ - j->idct_block_kernel = stbi__idct_block; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2; - -#ifdef STBI_SSE2 - if (stbi__sse2_available()) { - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; - } -#endif - -#ifdef STBI_NEON - j->idct_block_kernel = stbi__idct_simd; - j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd; - j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd; -#endif -} - -// clean up the temporary component buffers -static void stbi__cleanup_jpeg(stbi__jpeg* j) -{ - stbi__free_jpeg_components(j, j->s->img_n, 0); -} - -typedef struct -{ - resample_row_func resample; - stbi_uc* line0, * line1; - int hs, vs; // expansion factor in each axis - int w_lores; // horizontal pixels pre-expansion - int ystep; // how far through vertical expansion we are - int ypos; // which pre-expansion row we're on -} stbi__resample; - -// fast 0..255 * 0..255 => 0..255 rounded multiplication -static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y) -{ - unsigned int t = x * y + 128; - return (stbi_uc)((t + (t >> 8)) >> 8); -} - -static stbi_uc* load_jpeg_image(stbi__jpeg* z, int* out_x, int* out_y, int* comp, int req_comp) -{ - int n, decode_n, is_rgb; - z->s->img_n = 0; // make stbi__cleanup_jpeg safe - - // validate req_comp - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - - // load a jpeg image from whichever source, but leave in YCbCr format - if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; } - - // determine actual number of components to generate - n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1; - - is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif)); - - if (z->s->img_n == 3 && n < 3 && !is_rgb) - decode_n = 1; - else - decode_n = z->s->img_n; - - // resample and color-convert - { - int k; - unsigned int i, j; - stbi_uc* output; - stbi_uc* coutput[4]; - - stbi__resample res_comp[4]; - - for (k = 0; k < decode_n; ++k) { - stbi__resample* r = &res_comp[k]; - - // allocate line buffer big enough for upsampling off the edges - // with upsample factor of 4 - z->img_comp[k].linebuf = (stbi_uc*)stbi__malloc(z->s->img_x + 3); - if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - r->hs = z->img_h_max / z->img_comp[k].h; - r->vs = z->img_v_max / z->img_comp[k].v; - r->ystep = r->vs >> 1; - r->w_lores = (z->s->img_x + r->hs - 1) / r->hs; - r->ypos = 0; - r->line0 = r->line1 = z->img_comp[k].data; - - if (r->hs == 1 && r->vs == 1) r->resample = resample_row_1; - else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2; - else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2; - else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel; - else r->resample = stbi__resample_row_generic; - } - - // can't error after this so, this is safe - output = (stbi_uc*)stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1); - if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); } - - // now go ahead and resample - for (j = 0; j < z->s->img_y; ++j) { - stbi_uc* out = output + n * z->s->img_x * j; - for (k = 0; k < decode_n; ++k) { - stbi__resample* r = &res_comp[k]; - int y_bot = r->ystep >= (r->vs >> 1); - coutput[k] = r->resample(z->img_comp[k].linebuf, - y_bot ? r->line1 : r->line0, - y_bot ? r->line0 : r->line1, - r->w_lores, r->hs); - if (++r->ystep >= r->vs) { - r->ystep = 0; - r->line0 = r->line1; - if (++r->ypos < z->img_comp[k].y) - r->line1 += z->img_comp[k].w2; - } - } - if (n >= 3) { - stbi_uc* y = coutput[0]; - if (z->s->img_n == 3) { - if (is_rgb) { - for (i = 0; i < z->s->img_x; ++i) { - out[0] = y[i]; - out[1] = coutput[1][i]; - out[2] = coutput[2][i]; - out[3] = 255; - out += n; - } - } - else { - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } - else if (z->s->img_n == 4) { - if (z->app14_color_transform == 0) { // CMYK - for (i = 0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(coutput[0][i], m); - out[1] = stbi__blinn_8x8(coutput[1][i], m); - out[2] = stbi__blinn_8x8(coutput[2][i], m); - out[3] = 255; - out += n; - } - } - else if (z->app14_color_transform == 2) { // YCCK - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - for (i = 0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - out[0] = stbi__blinn_8x8(255 - out[0], m); - out[1] = stbi__blinn_8x8(255 - out[1], m); - out[2] = stbi__blinn_8x8(255 - out[2], m); - out += n; - } - } - else { // YCbCr + alpha? Ignore the fourth channel for now - z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n); - } - } - else - for (i = 0; i < z->s->img_x; ++i) { - out[0] = out[1] = out[2] = y[i]; - out[3] = 255; // not used if n==3 - out += n; - } - } - else { - if (is_rgb) { - if (n == 1) - for (i = 0; i < z->s->img_x; ++i) - * out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - else { - for (i = 0; i < z->s->img_x; ++i, out += 2) { - out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]); - out[1] = 255; - } - } - } - else if (z->s->img_n == 4 && z->app14_color_transform == 0) { - for (i = 0; i < z->s->img_x; ++i) { - stbi_uc m = coutput[3][i]; - stbi_uc r = stbi__blinn_8x8(coutput[0][i], m); - stbi_uc g = stbi__blinn_8x8(coutput[1][i], m); - stbi_uc b = stbi__blinn_8x8(coutput[2][i], m); - out[0] = stbi__compute_y(r, g, b); - out[1] = 255; - out += n; - } - } - else if (z->s->img_n == 4 && z->app14_color_transform == 2) { - for (i = 0; i < z->s->img_x; ++i) { - out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]); - out[1] = 255; - out += n; - } - } - else { - stbi_uc* y = coutput[0]; - if (n == 1) - for (i = 0; i < z->s->img_x; ++i) out[i] = y[i]; - else - for (i = 0; i < z->s->img_x; ++i)* out++ = y[i], * out++ = 255; - } - } - } - stbi__cleanup_jpeg(z); - *out_x = z->s->img_x; - *out_y = z->s->img_y; - if (comp)* comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output - return output; - } -} - -static void* stbi__jpeg_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - unsigned char* result; - stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); - STBI_NOTUSED(ri); - j->s = s; - stbi__setup_jpeg(j); - result = load_jpeg_image(j, x, y, comp, req_comp); - STBI_FREE(j); - return result; -} - -static int stbi__jpeg_test(stbi__context* s) -{ - int r; - stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg)); - j->s = s; - stbi__setup_jpeg(j); - r = stbi__decode_jpeg_header(j, STBI__SCAN_type); - stbi__rewind(s); - STBI_FREE(j); - return r; -} - -static int stbi__jpeg_info_raw(stbi__jpeg* j, int* x, int* y, int* comp) -{ - if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) { - stbi__rewind(j->s); - return 0; - } - if (x)* x = j->s->img_x; - if (y)* y = j->s->img_y; - if (comp)* comp = j->s->img_n >= 3 ? 3 : 1; - return 1; -} - -static int stbi__jpeg_info(stbi__context* s, int* x, int* y, int* comp) -{ - int result; - stbi__jpeg* j = (stbi__jpeg*)(stbi__malloc(sizeof(stbi__jpeg))); - j->s = s; - result = stbi__jpeg_info_raw(j, x, y, comp); - STBI_FREE(j); - return result; -} -#endif - -// public domain zlib decode v0.2 Sean Barrett 2006-11-18 -// simple implementation -// - all input must be provided in an upfront buffer -// - all output is written to a single output buffer (can malloc/realloc) -// performance -// - fast huffman - -#ifndef STBI_NO_ZLIB - -// fast-way is faster to check than jpeg huffman, but slow way is slower -#define STBI__ZFAST_BITS 9 // accelerate all cases in default tables -#define STBI__ZFAST_MASK ((1 << STBI__ZFAST_BITS) - 1) - -// zlib-style huffman encoding -// (jpegs packs from left, zlib from right, so can't share code) -typedef struct -{ - stbi__uint16 fast[1 << STBI__ZFAST_BITS]; - stbi__uint16 firstcode[16]; - int maxcode[17]; - stbi__uint16 firstsymbol[16]; - stbi_uc size[288]; - stbi__uint16 value[288]; -} stbi__zhuffman; - -stbi_inline static int stbi__bitreverse16(int n) -{ - n = ((n & 0xAAAA) >> 1) | ((n & 0x5555) << 1); - n = ((n & 0xCCCC) >> 2) | ((n & 0x3333) << 2); - n = ((n & 0xF0F0) >> 4) | ((n & 0x0F0F) << 4); - n = ((n & 0xFF00) >> 8) | ((n & 0x00FF) << 8); - return n; -} - -stbi_inline static int stbi__bit_reverse(int v, int bits) -{ - STBI_ASSERT(bits <= 16); - // to bit reverse n bits, reverse 16 and shift - // e.g. 11 bits, bit reverse and shift away 5 - return stbi__bitreverse16(v) >> (16 - bits); -} - -static int stbi__zbuild_huffman(stbi__zhuffman* z, const stbi_uc* sizelist, int num) -{ - int i, k = 0; - int code, next_code[16], sizes[17]; - - // DEFLATE spec for generating codes - memset(sizes, 0, sizeof(sizes)); - memset(z->fast, 0, sizeof(z->fast)); - for (i = 0; i < num; ++i) - ++sizes[sizelist[i]]; - sizes[0] = 0; - for (i = 1; i < 16; ++i) - if (sizes[i] > (1 << i)) - return stbi__err("bad sizes", "Corrupt PNG"); - code = 0; - for (i = 1; i < 16; ++i) { - next_code[i] = code; - z->firstcode[i] = (stbi__uint16)code; - z->firstsymbol[i] = (stbi__uint16)k; - code = (code + sizes[i]); - if (sizes[i]) - if (code - 1 >= (1 << i)) return stbi__err("bad codelengths", "Corrupt PNG"); - z->maxcode[i] = code << (16 - i); // preshift for inner loop - code <<= 1; - k += sizes[i]; - } - z->maxcode[16] = 0x10000; // sentinel - for (i = 0; i < num; ++i) { - int s = sizelist[i]; - if (s) { - int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s]; - stbi__uint16 fastv = (stbi__uint16)((s << 9) | i); - z->size[c] = (stbi_uc)s; - z->value[c] = (stbi__uint16)i; - if (s <= STBI__ZFAST_BITS) { - int j = stbi__bit_reverse(next_code[s], s); - while (j < (1 << STBI__ZFAST_BITS)) { - z->fast[j] = fastv; - j += (1 << s); - } - } - ++next_code[s]; - } - } - return 1; -} - -// zlib-from-memory implementation for PNG reading -// because PNG allows splitting the zlib stream arbitrarily, -// and it's annoying structurally to have PNG call ZLIB call PNG, -// we require PNG read all the IDATs and combine them into a single -// memory buffer - -typedef struct -{ - stbi_uc* zbuffer, * zbuffer_end; - int num_bits; - stbi__uint32 code_buffer; - - char* zout; - char* zout_start; - char* zout_end; - int z_expandable; - - stbi__zhuffman z_length, z_distance; -} stbi__zbuf; - -stbi_inline static stbi_uc stbi__zget8(stbi__zbuf* z) -{ - if (z->zbuffer >= z->zbuffer_end) return 0; - return *z->zbuffer++; -} - -static void stbi__fill_bits(stbi__zbuf* z) -{ - do { - STBI_ASSERT(z->code_buffer < (1U << z->num_bits)); - z->code_buffer |= (unsigned int)stbi__zget8(z) << z->num_bits; - z->num_bits += 8; - } while (z->num_bits <= 24); -} - -stbi_inline static unsigned int stbi__zreceive(stbi__zbuf* z, int n) -{ - unsigned int k; - if (z->num_bits < n) stbi__fill_bits(z); - k = z->code_buffer & ((1 << n) - 1); - z->code_buffer >>= n; - z->num_bits -= n; - return k; -} - -static int stbi__zhuffman_decode_slowpath(stbi__zbuf* a, stbi__zhuffman* z) -{ - int b, s, k; - // not resolved by fast table, so compute it the slow way - // use jpeg approach, which requires MSbits at top - k = stbi__bit_reverse(a->code_buffer, 16); - for (s = STBI__ZFAST_BITS + 1; ; ++s) - if (k < z->maxcode[s]) - break; - if (s == 16) return -1; // invalid code! - // code size is s, so: - b = (k >> (16 - s)) - z->firstcode[s] + z->firstsymbol[s]; - STBI_ASSERT(z->size[b] == s); - a->code_buffer >>= s; - a->num_bits -= s; - return z->value[b]; -} - -stbi_inline static int stbi__zhuffman_decode(stbi__zbuf* a, stbi__zhuffman* z) -{ - int b, s; - if (a->num_bits < 16) stbi__fill_bits(a); - b = z->fast[a->code_buffer & STBI__ZFAST_MASK]; - if (b) { - s = b >> 9; - a->code_buffer >>= s; - a->num_bits -= s; - return b & 511; - } - return stbi__zhuffman_decode_slowpath(a, z); -} - -static int stbi__zexpand(stbi__zbuf* z, char* zout, int n) // need to make room for n bytes -{ - char* q; - int cur, limit, old_limit; - z->zout = zout; - if (!z->z_expandable) return stbi__err("output buffer limit", "Corrupt PNG"); - cur = (int)(z->zout - z->zout_start); - limit = old_limit = (int)(z->zout_end - z->zout_start); - while (cur + n > limit) - limit *= 2; - q = (char*)STBI_REALLOC_SIZED(z->zout_start, old_limit, limit); - STBI_NOTUSED(old_limit); - if (q == NULL) return stbi__err("outofmem", "Out of memory"); - z->zout_start = q; - z->zout = q + cur; - z->zout_end = q + limit; - return 1; -} - -static const int stbi__zlength_base[31] = { - 3,4,5,6,7,8,9,10,11,13, - 15,17,19,23,27,31,35,43,51,59, - 67,83,99,115,131,163,195,227,258,0,0 }; - -static const int stbi__zlength_extra[31] = -{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 }; - -static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, -257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0 }; - -static const int stbi__zdist_extra[32] = -{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13 }; - -static int stbi__parse_huffman_block(stbi__zbuf* a) -{ - char* zout = a->zout; - for (;;) { - int z = stbi__zhuffman_decode(a, &a->z_length); - if (z < 256) { - if (z < 0) return stbi__err("bad huffman code", "Corrupt PNG"); // error in huffman codes - if (zout >= a->zout_end) { - if (!stbi__zexpand(a, zout, 1)) return 0; - zout = a->zout; - } - *zout++ = (char)z; - } - else { - stbi_uc* p; - int len, dist; - if (z == 256) { - a->zout = zout; - return 1; - } - z -= 257; - len = stbi__zlength_base[z]; - if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]); - z = stbi__zhuffman_decode(a, &a->z_distance); - if (z < 0) return stbi__err("bad huffman code", "Corrupt PNG"); - dist = stbi__zdist_base[z]; - if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]); - if (zout - a->zout_start < dist) return stbi__err("bad dist", "Corrupt PNG"); - if (zout + len > a->zout_end) { - if (!stbi__zexpand(a, zout, len)) return 0; - zout = a->zout; - } - p = (stbi_uc*)(zout - dist); - if (dist == 1) { // run of one byte; common in images. - stbi_uc v = *p; - if (len) { do *zout++ = v; while (--len); } - } - else { - if (len) { do *zout++ = *p++; while (--len); } - } - } - } -} - -static int stbi__compute_huffman_codes(stbi__zbuf* a) -{ - static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 }; - stbi__zhuffman z_codelength; - stbi_uc lencodes[286 + 32 + 137];//padding for maximum single op - stbi_uc codelength_sizes[19]; - int i, n; - - int hlit = stbi__zreceive(a, 5) + 257; - int hdist = stbi__zreceive(a, 5) + 1; - int hclen = stbi__zreceive(a, 4) + 4; - int ntot = hlit + hdist; - - memset(codelength_sizes, 0, sizeof(codelength_sizes)); - for (i = 0; i < hclen; ++i) { - int s = stbi__zreceive(a, 3); - codelength_sizes[length_dezigzag[i]] = (stbi_uc)s; - } - if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0; - - n = 0; - while (n < ntot) { - int c = stbi__zhuffman_decode(a, &z_codelength); - if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG"); - if (c < 16) - lencodes[n++] = (stbi_uc)c; - else { - stbi_uc fill = 0; - if (c == 16) { - c = stbi__zreceive(a, 2) + 3; - if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG"); - fill = lencodes[n - 1]; - } - else if (c == 17) - c = stbi__zreceive(a, 3) + 3; - else { - STBI_ASSERT(c == 18); - c = stbi__zreceive(a, 7) + 11; - } - if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG"); - memset(lencodes + n, fill, c); - n += c; - } - } - if (n != ntot) return stbi__err("bad codelengths", "Corrupt PNG"); - if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, lencodes + hlit, hdist)) return 0; - return 1; -} - -static int stbi__parse_uncompressed_block(stbi__zbuf* a) -{ - stbi_uc header[4]; - int len, nlen, k; - if (a->num_bits & 7) - stbi__zreceive(a, a->num_bits & 7); // discard - // drain the bit-packed data into header - k = 0; - while (a->num_bits > 0) { - header[k++] = (stbi_uc)(a->code_buffer & 255); // suppress MSVC run-time check - a->code_buffer >>= 8; - a->num_bits -= 8; - } - STBI_ASSERT(a->num_bits == 0); - // now fill header the normal way - while (k < 4) - header[k++] = stbi__zget8(a); - len = header[1] * 256 + header[0]; - nlen = header[3] * 256 + header[2]; - if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt", "Corrupt PNG"); - if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer", "Corrupt PNG"); - if (a->zout + len > a->zout_end) - if (!stbi__zexpand(a, a->zout, len)) return 0; - memcpy(a->zout, a->zbuffer, len); - a->zbuffer += len; - a->zout += len; - return 1; -} - -static int stbi__parse_zlib_header(stbi__zbuf* a) -{ - int cmf = stbi__zget8(a); - int cm = cmf & 15; - /* int cinfo = cmf >> 4; */ - int flg = stbi__zget8(a); - if ((cmf * 256 + flg) % 31 != 0) return stbi__err("bad zlib header", "Corrupt PNG"); // zlib spec - if (flg & 32) return stbi__err("no preset dict", "Corrupt PNG"); // preset dictionary not allowed in png - if (cm != 8) return stbi__err("bad compression", "Corrupt PNG"); // DEFLATE required for png - // window = 1 << (8 + cinfo)... but who cares, we fully buffer output - return 1; -} - -static const stbi_uc stbi__zdefault_length[288] = -{ - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, - 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, - 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8 -}; -static const stbi_uc stbi__zdefault_distance[32] = -{ - 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5 -}; -/* -Init algorithm: -{ - int i; // use <= to match clearly with spec - for (i=0; i <= 143; ++i) stbi__zdefault_length[i] = 8; - for ( ; i <= 255; ++i) stbi__zdefault_length[i] = 9; - for ( ; i <= 279; ++i) stbi__zdefault_length[i] = 7; - for ( ; i <= 287; ++i) stbi__zdefault_length[i] = 8; - - for (i=0; i <= 31; ++i) stbi__zdefault_distance[i] = 5; -} -*/ - -static int stbi__parse_zlib(stbi__zbuf* a, int parse_header) -{ - int final, type; - if (parse_header) - if (!stbi__parse_zlib_header(a)) return 0; - a->num_bits = 0; - a->code_buffer = 0; - do { - final = stbi__zreceive(a, 1); - type = stbi__zreceive(a, 2); - if (type == 0) { - if (!stbi__parse_uncompressed_block(a)) return 0; - } - else if (type == 3) { - return 0; - } - else { - if (type == 1) { - // use fixed code lengths - if (!stbi__zbuild_huffman(&a->z_length, stbi__zdefault_length, 288)) return 0; - if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance, 32)) return 0; - } - else { - if (!stbi__compute_huffman_codes(a)) return 0; - } - if (!stbi__parse_huffman_block(a)) return 0; - } - } while (!final); - return 1; -} - -static int stbi__do_zlib(stbi__zbuf* a, char* obuf, int olen, int exp, int parse_header) -{ - a->zout_start = obuf; - a->zout = obuf; - a->zout_end = obuf + olen; - a->z_expandable = exp; - - return stbi__parse_zlib(a, parse_header); -} - -STBIDEF char* stbi_zlib_decode_malloc_guesssize(const char* buffer, int len, int initial_size, int* outlen) -{ - stbi__zbuf a; - char* p = (char*)stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc*)buffer; - a.zbuffer_end = (stbi_uc*)buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, 1)) { - if (outlen)* outlen = (int)(a.zout - a.zout_start); - return a.zout_start; - } - else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF char* stbi_zlib_decode_malloc(char const* buffer, int len, int* outlen) -{ - return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen); -} - -STBIDEF char* stbi_zlib_decode_malloc_guesssize_headerflag(const char* buffer, int len, int initial_size, int* outlen, int parse_header) -{ - stbi__zbuf a; - char* p = (char*)stbi__malloc(initial_size); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc*)buffer; - a.zbuffer_end = (stbi_uc*)buffer + len; - if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) { - if (outlen)* outlen = (int)(a.zout - a.zout_start); - return a.zout_start; - } - else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_buffer(char* obuffer, int olen, char const* ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc*)ibuffer; - a.zbuffer_end = (stbi_uc*)ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 1)) - return (int)(a.zout - a.zout_start); - else - return -1; -} - -STBIDEF char* stbi_zlib_decode_noheader_malloc(char const* buffer, int len, int* outlen) -{ - stbi__zbuf a; - char* p = (char*)stbi__malloc(16384); - if (p == NULL) return NULL; - a.zbuffer = (stbi_uc*)buffer; - a.zbuffer_end = (stbi_uc*)buffer + len; - if (stbi__do_zlib(&a, p, 16384, 1, 0)) { - if (outlen)* outlen = (int)(a.zout - a.zout_start); - return a.zout_start; - } - else { - STBI_FREE(a.zout_start); - return NULL; - } -} - -STBIDEF int stbi_zlib_decode_noheader_buffer(char* obuffer, int olen, const char* ibuffer, int ilen) -{ - stbi__zbuf a; - a.zbuffer = (stbi_uc*)ibuffer; - a.zbuffer_end = (stbi_uc*)ibuffer + ilen; - if (stbi__do_zlib(&a, obuffer, olen, 0, 0)) - return (int)(a.zout - a.zout_start); - else - return -1; -} -#endif - -// public domain "baseline" PNG decoder v0.10 Sean Barrett 2006-11-18 -// simple implementation -// - only 8-bit samples -// - no CRC checking -// - allocates lots of intermediate memory -// - avoids problem of streaming data between subsystems -// - avoids explicit window management -// performance -// - uses stb_zlib, a PD zlib implementation with fast huffman decoding - -#ifndef STBI_NO_PNG -typedef struct -{ - stbi__uint32 length; - stbi__uint32 type; -} stbi__pngchunk; - -static stbi__pngchunk stbi__get_chunk_header(stbi__context* s) -{ - stbi__pngchunk c; - c.length = stbi__get32be(s); - c.type = stbi__get32be(s); - return c; -} - -static int stbi__check_png_header(stbi__context* s) -{ - static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 }; - int i; - for (i = 0; i < 8; ++i) - if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig", "Not a PNG"); - return 1; -} - -typedef struct -{ - stbi__context* s; - stbi_uc* idata, * expanded, * out; - int depth; -} stbi__png; - - -enum { - STBI__F_none = 0, - STBI__F_sub = 1, - STBI__F_up = 2, - STBI__F_avg = 3, - STBI__F_paeth = 4, - // synthetic filters used for first scanline to avoid needing a dummy row of 0s - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static stbi_uc first_row_filter[5] = -{ - STBI__F_none, - STBI__F_sub, - STBI__F_none, - STBI__F_avg_first, - STBI__F_paeth_first -}; - -static int stbi__paeth(int a, int b, int c) -{ - int p = a + b - c; - int pa = abs(p - a); - int pb = abs(p - b); - int pc = abs(p - c); - if (pa <= pb && pa <= pc) return a; - if (pb <= pc) return b; - return c; -} - -static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 }; - -// create the png data from post-deflated data -static int stbi__create_png_image_raw(stbi__png* a, stbi_uc* raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color) -{ - int bytes = (depth == 16 ? 2 : 1); - stbi__context* s = a->s; - stbi__uint32 i, j, stride = x * out_n * bytes; - stbi__uint32 img_len, img_width_bytes; - int k; - int img_n = s->img_n; // copy it into a local for later - - int output_bytes = out_n * bytes; - int filter_bytes = img_n * bytes; - int width = x; - - STBI_ASSERT(out_n == s->img_n || out_n == s->img_n + 1); - a->out = (stbi_uc*)stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into - if (!a->out) return stbi__err("outofmem", "Out of memory"); - - if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG"); - img_width_bytes = (((img_n * x * depth) + 7) >> 3); - img_len = (img_width_bytes + 1) * y; - - // we used to check for exact match between raw_len and img_len on non-interlaced PNGs, - // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros), - // so just check for raw_len < img_len always. - if (raw_len < img_len) return stbi__err("not enough pixels", "Corrupt PNG"); - - for (j = 0; j < y; ++j) { - stbi_uc* cur = a->out + stride * j; - stbi_uc* prior; - int filter = *raw++; - - if (filter > 4) - return stbi__err("invalid filter", "Corrupt PNG"); - - if (depth < 8) { - STBI_ASSERT(img_width_bytes <= x); - cur += x * out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place - filter_bytes = 1; - width = img_width_bytes; - } - prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above - - // if first row, use special filter that doesn't sample previous row - if (j == 0) filter = first_row_filter[filter]; - - // handle first byte explicitly - for (k = 0; k < filter_bytes; ++k) { - switch (filter) { - case STBI__F_none: cur[k] = raw[k]; break; - case STBI__F_sub: cur[k] = raw[k]; break; - case STBI__F_up: cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break; - case STBI__F_avg: cur[k] = STBI__BYTECAST(raw[k] + (prior[k] >> 1)); break; - case STBI__F_paeth: cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0, prior[k], 0)); break; - case STBI__F_avg_first: cur[k] = raw[k]; break; - case STBI__F_paeth_first: cur[k] = raw[k]; break; - } - } - - if (depth == 8) { - if (img_n != out_n) - cur[img_n] = 255; // first pixel - raw += img_n; - cur += out_n; - prior += out_n; - } - else if (depth == 16) { - if (img_n != out_n) { - cur[filter_bytes] = 255; // first pixel top byte - cur[filter_bytes + 1] = 255; // first pixel bottom byte - } - raw += filter_bytes; - cur += output_bytes; - prior += output_bytes; - } - else { - raw += 1; - cur += 1; - prior += 1; - } - - // this is a little gross, so that we don't switch per-pixel or per-component - if (depth < 8 || img_n == out_n) { - int nk = (width - 1) * filter_bytes; -#define STBI__CASE(f) \ - case f: \ - for (k=0; k < nk; ++k) - switch (filter) { - // "none" filter turns into a memcpy here; make that explicit. - case STBI__F_none: memcpy(cur, raw, nk); break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - filter_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - filter_bytes]) >> 1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], prior[k], prior[k - filter_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - filter_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - filter_bytes], 0, 0)); } break; - } -#undef STBI__CASE - raw += nk; - } - else { - STBI_ASSERT(img_n + 1 == out_n); -#define STBI__CASE(f) \ - case f: \ - for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \ - for (k=0; k < filter_bytes; ++k) - switch (filter) { - STBI__CASE(STBI__F_none) { cur[k] = raw[k]; } break; - STBI__CASE(STBI__F_sub) { cur[k] = STBI__BYTECAST(raw[k] + cur[k - output_bytes]); } break; - STBI__CASE(STBI__F_up) { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break; - STBI__CASE(STBI__F_avg) { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k - output_bytes]) >> 1)); } break; - STBI__CASE(STBI__F_paeth) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], prior[k], prior[k - output_bytes])); } break; - STBI__CASE(STBI__F_avg_first) { cur[k] = STBI__BYTECAST(raw[k] + (cur[k - output_bytes] >> 1)); } break; - STBI__CASE(STBI__F_paeth_first) { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k - output_bytes], 0, 0)); } break; - } -#undef STBI__CASE - - // the loop above sets the high byte of the pixels' alpha, but for - // 16 bit png files we also need the low byte set. we'll do that here. - if (depth == 16) { - cur = a->out + stride * j; // start at the beginning of the row again - for (i = 0; i < x; ++i, cur += output_bytes) { - cur[filter_bytes + 1] = 255; - } - } - } - } - - // we make a separate pass to expand bits to pixels; for performance, - // this could run two scanlines behind the above code, so it won't - // intefere with filtering but will still be in the cache. - if (depth < 8) { - for (j = 0; j < y; ++j) { - stbi_uc* cur = a->out + stride * j; - stbi_uc* in = a->out + stride * j + x * out_n - img_width_bytes; - // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit - // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop - stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range - - // note that the final byte might overshoot and write more data than desired. - // we can allocate enough data that this never writes out of memory, but it - // could also overwrite the next scanline. can it overwrite non-empty data - // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel. - // so we need to explicitly clamp the final ones - - if (depth == 4) { - for (k = x * img_n; k >= 2; k -= 2, ++in) { - *cur++ = scale * ((*in >> 4)); - *cur++ = scale * ((*in) & 0x0f); - } - if (k > 0)* cur++ = scale * ((*in >> 4)); - } - else if (depth == 2) { - for (k = x * img_n; k >= 4; k -= 4, ++in) { - *cur++ = scale * ((*in >> 6)); - *cur++ = scale * ((*in >> 4) & 0x03); - *cur++ = scale * ((*in >> 2) & 0x03); - *cur++ = scale * ((*in) & 0x03); - } - if (k > 0)* cur++ = scale * ((*in >> 6)); - if (k > 1)* cur++ = scale * ((*in >> 4) & 0x03); - if (k > 2)* cur++ = scale * ((*in >> 2) & 0x03); - } - else if (depth == 1) { - for (k = x * img_n; k >= 8; k -= 8, ++in) { - *cur++ = scale * ((*in >> 7)); - *cur++ = scale * ((*in >> 6) & 0x01); - *cur++ = scale * ((*in >> 5) & 0x01); - *cur++ = scale * ((*in >> 4) & 0x01); - *cur++ = scale * ((*in >> 3) & 0x01); - *cur++ = scale * ((*in >> 2) & 0x01); - *cur++ = scale * ((*in >> 1) & 0x01); - *cur++ = scale * ((*in) & 0x01); - } - if (k > 0)* cur++ = scale * ((*in >> 7)); - if (k > 1)* cur++ = scale * ((*in >> 6) & 0x01); - if (k > 2)* cur++ = scale * ((*in >> 5) & 0x01); - if (k > 3)* cur++ = scale * ((*in >> 4) & 0x01); - if (k > 4)* cur++ = scale * ((*in >> 3) & 0x01); - if (k > 5)* cur++ = scale * ((*in >> 2) & 0x01); - if (k > 6)* cur++ = scale * ((*in >> 1) & 0x01); - } - if (img_n != out_n) { - int q; - // insert alpha = 255 - cur = a->out + stride * j; - if (img_n == 1) { - for (q = x - 1; q >= 0; --q) { - cur[q * 2 + 1] = 255; - cur[q * 2 + 0] = cur[q]; - } - } - else { - STBI_ASSERT(img_n == 3); - for (q = x - 1; q >= 0; --q) { - cur[q * 4 + 3] = 255; - cur[q * 4 + 2] = cur[q * 3 + 2]; - cur[q * 4 + 1] = cur[q * 3 + 1]; - cur[q * 4 + 0] = cur[q * 3 + 0]; - } - } - } - } - } - else if (depth == 16) { - // force the image data from big-endian to platform-native. - // this is done in a separate pass due to the decoding relying - // on the data being untouched, but could probably be done - // per-line during decode if care is taken. - stbi_uc* cur = a->out; - stbi__uint16* cur16 = (stbi__uint16*)cur; - - for (i = 0; i < x * y * out_n; ++i, cur16++, cur += 2) { - *cur16 = (cur[0] << 8) | cur[1]; - } - } - - return 1; -} - -static int stbi__create_png_image(stbi__png* a, stbi_uc* image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced) -{ - int bytes = (depth == 16 ? 2 : 1); - int out_bytes = out_n * bytes; - stbi_uc* final; - int p; - if (!interlaced) - return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color); - - // de-interlacing - final = (stbi_uc*)stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0); - for (p = 0; p < 7; ++p) { - int xorig[] = { 0,4,0,2,0,1,0 }; - int yorig[] = { 0,0,4,0,2,0,1 }; - int xspc[] = { 8,8,4,4,2,2,1 }; - int yspc[] = { 8,8,8,4,4,2,2 }; - int i, j, x, y; - // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1 - x = (a->s->img_x - xorig[p] + xspc[p] - 1) / xspc[p]; - y = (a->s->img_y - yorig[p] + yspc[p] - 1) / yspc[p]; - if (x && y) { - stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y; - if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) { - STBI_FREE(final); - return 0; - } - for (j = 0; j < y; ++j) { - for (i = 0; i < x; ++i) { - int out_y = j * yspc[p] + yorig[p]; - int out_x = i * xspc[p] + xorig[p]; - memcpy(final + out_y * a->s->img_x * out_bytes + out_x * out_bytes, - a->out + (j * x + i) * out_bytes, out_bytes); - } - } - STBI_FREE(a->out); - image_data += img_len; - image_data_len -= img_len; - } - } - a->out = final; - - return 1; -} - -static int stbi__compute_transparency(stbi__png* z, stbi_uc tc[3], int out_n) -{ - stbi__context* s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc* p = z->out; - - // compute color-based transparency, assuming we've - // already got 255 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i = 0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 255); - p += 2; - } - } - else { - for (i = 0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__compute_transparency16(stbi__png* z, stbi__uint16 tc[3], int out_n) -{ - stbi__context* s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi__uint16* p = (stbi__uint16*)z->out; - - // compute color-based transparency, assuming we've - // already got 65535 as the alpha value in the output - STBI_ASSERT(out_n == 2 || out_n == 4); - - if (out_n == 2) { - for (i = 0; i < pixel_count; ++i) { - p[1] = (p[0] == tc[0] ? 0 : 65535); - p += 2; - } - } - else { - for (i = 0; i < pixel_count; ++i) { - if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2]) - p[3] = 0; - p += 4; - } - } - return 1; -} - -static int stbi__expand_png_palette(stbi__png* a, stbi_uc* palette, int len, int pal_img_n) -{ - stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y; - stbi_uc* p, * temp_out, * orig = a->out; - - p = (stbi_uc*)stbi__malloc_mad2(pixel_count, pal_img_n, 0); - if (p == NULL) return stbi__err("outofmem", "Out of memory"); - - // between here and free(out) below, exitting would leak - temp_out = p; - - if (pal_img_n == 3) { - for (i = 0; i < pixel_count; ++i) { - int n = orig[i] * 4; - p[0] = palette[n]; - p[1] = palette[n + 1]; - p[2] = palette[n + 2]; - p += 3; - } - } - else { - for (i = 0; i < pixel_count; ++i) { - int n = orig[i] * 4; - p[0] = palette[n]; - p[1] = palette[n + 1]; - p[2] = palette[n + 2]; - p[3] = palette[n + 3]; - p += 4; - } - } - STBI_FREE(a->out); - a->out = temp_out; - - STBI_NOTUSED(len); - - return 1; -} - -static int stbi__unpremultiply_on_load = 0; -static int stbi__de_iphone_flag = 0; - -STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply) -{ - stbi__unpremultiply_on_load = flag_true_if_should_unpremultiply; -} - -STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert) -{ - stbi__de_iphone_flag = flag_true_if_should_convert; -} - -static void stbi__de_iphone(stbi__png* z) -{ - stbi__context* s = z->s; - stbi__uint32 i, pixel_count = s->img_x * s->img_y; - stbi_uc* p = z->out; - - if (s->img_out_n == 3) { // convert bgr to rgb - for (i = 0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 3; - } - } - else { - STBI_ASSERT(s->img_out_n == 4); - if (stbi__unpremultiply_on_load) { - // convert bgr to rgb and unpremultiply - for (i = 0; i < pixel_count; ++i) { - stbi_uc a = p[3]; - stbi_uc t = p[0]; - if (a) { - stbi_uc half = a / 2; - p[0] = (p[2] * 255 + half) / a; - p[1] = (p[1] * 255 + half) / a; - p[2] = (t * 255 + half) / a; - } - else { - p[0] = p[2]; - p[2] = t; - } - p += 4; - } - } - else { - // convert bgr to rgb - for (i = 0; i < pixel_count; ++i) { - stbi_uc t = p[0]; - p[0] = p[2]; - p[2] = t; - p += 4; - } - } - } -} - -#define STBI__PNG_TYPE(a,b,c,d) (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d)) - -static int stbi__parse_png_file(stbi__png* z, int scan, int req_comp) -{ - stbi_uc palette[1024], pal_img_n = 0; - stbi_uc has_trans = 0, tc[3]; - stbi__uint16 tc16[3]; - stbi__uint32 ioff = 0, idata_limit = 0, i, pal_len = 0; - int first = 1, k, interlace = 0, color = 0, is_iphone = 0; - stbi__context* s = z->s; - - z->expanded = NULL; - z->idata = NULL; - z->out = NULL; - - if (!stbi__check_png_header(s)) return 0; - - if (scan == STBI__SCAN_type) return 1; - - for (;;) { - stbi__pngchunk c = stbi__get_chunk_header(s); - switch (c.type) { - case STBI__PNG_TYPE('C', 'g', 'B', 'I'): - is_iphone = 1; - stbi__skip(s, c.length); - break; - case STBI__PNG_TYPE('I', 'H', 'D', 'R'): { - int comp, filter; - if (!first) return stbi__err("multiple IHDR", "Corrupt PNG"); - first = 0; - if (c.length != 13) return stbi__err("bad IHDR len", "Corrupt PNG"); - s->img_x = stbi__get32be(s); if (s->img_x > (1 << 24)) return stbi__err("too large", "Very large image (corrupt?)"); - s->img_y = stbi__get32be(s); if (s->img_y > (1 << 24)) return stbi__err("too large", "Very large image (corrupt?)"); - z->depth = stbi__get8(s); if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16) return stbi__err("1/2/4/8/16-bit only", "PNG not supported: 1/2/4/8/16-bit only"); - color = stbi__get8(s); if (color > 6) return stbi__err("bad ctype", "Corrupt PNG"); - if (color == 3 && z->depth == 16) return stbi__err("bad ctype", "Corrupt PNG"); - if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype", "Corrupt PNG"); - comp = stbi__get8(s); if (comp) return stbi__err("bad comp method", "Corrupt PNG"); - filter = stbi__get8(s); if (filter) return stbi__err("bad filter method", "Corrupt PNG"); - interlace = stbi__get8(s); if (interlace > 1) return stbi__err("bad interlace method", "Corrupt PNG"); - if (!s->img_x || !s->img_y) return stbi__err("0-pixel image", "Corrupt PNG"); - if (!pal_img_n) { - s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0); - if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode"); - if (scan == STBI__SCAN_header) return 1; - } - else { - // if paletted, then pal_n is our final components, and - // img_n is # components to decompress/filter. - s->img_n = 1; - if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large", "Corrupt PNG"); - // if SCAN_header, have to scan to see if we have a tRNS - } - break; - } - - case STBI__PNG_TYPE('P', 'L', 'T', 'E'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (c.length > 256 * 3) return stbi__err("invalid PLTE", "Corrupt PNG"); - pal_len = c.length / 3; - if (pal_len * 3 != c.length) return stbi__err("invalid PLTE", "Corrupt PNG"); - for (i = 0; i < pal_len; ++i) { - palette[i * 4 + 0] = stbi__get8(s); - palette[i * 4 + 1] = stbi__get8(s); - palette[i * 4 + 2] = stbi__get8(s); - palette[i * 4 + 3] = 255; - } - break; - } - - case STBI__PNG_TYPE('t', 'R', 'N', 'S'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (z->idata) return stbi__err("tRNS after IDAT", "Corrupt PNG"); - if (pal_img_n) { - if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; } - if (pal_len == 0) return stbi__err("tRNS before PLTE", "Corrupt PNG"); - if (c.length > pal_len) return stbi__err("bad tRNS len", "Corrupt PNG"); - pal_img_n = 4; - for (i = 0; i < c.length; ++i) - palette[i * 4 + 3] = stbi__get8(s); - } - else { - if (!(s->img_n & 1)) return stbi__err("tRNS with alpha", "Corrupt PNG"); - if (c.length != (stbi__uint32)s->img_n * 2) return stbi__err("bad tRNS len", "Corrupt PNG"); - has_trans = 1; - if (z->depth == 16) { - for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is - } - else { - for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger - } - } - break; - } - - case STBI__PNG_TYPE('I', 'D', 'A', 'T'): { - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (pal_img_n && !pal_len) return stbi__err("no PLTE", "Corrupt PNG"); - if (scan == STBI__SCAN_header) { s->img_n = pal_img_n; return 1; } - if ((int)(ioff + c.length) < (int)ioff) return 0; - if (ioff + c.length > idata_limit) { - stbi__uint32 idata_limit_old = idata_limit; - stbi_uc* p; - if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096; - while (ioff + c.length > idata_limit) - idata_limit *= 2; - STBI_NOTUSED(idata_limit_old); - p = (stbi_uc*)STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory"); - z->idata = p; - } - if (!stbi__getn(s, z->idata + ioff, c.length)) return stbi__err("outofdata", "Corrupt PNG"); - ioff += c.length; - break; - } - - case STBI__PNG_TYPE('I', 'E', 'N', 'D'): { - stbi__uint32 raw_len, bpl; - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if (scan != STBI__SCAN_load) return 1; - if (z->idata == NULL) return stbi__err("no IDAT", "Corrupt PNG"); - // initial guess for decoded data size to avoid unnecessary reallocs - bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component - raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */; - z->expanded = (stbi_uc*)stbi_zlib_decode_malloc_guesssize_headerflag((char*)z->idata, ioff, raw_len, (int*)& raw_len, !is_iphone); - if (z->expanded == NULL) return 0; // zlib should set error - STBI_FREE(z->idata); z->idata = NULL; - if ((req_comp == s->img_n + 1 && req_comp != 3 && !pal_img_n) || has_trans) - s->img_out_n = s->img_n + 1; - else - s->img_out_n = s->img_n; - if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0; - if (has_trans) { - if (z->depth == 16) { - if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0; - } - else { - if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0; - } - } - if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2) - stbi__de_iphone(z); - if (pal_img_n) { - // pal_img_n == 3 or 4 - s->img_n = pal_img_n; // record the actual colors we had - s->img_out_n = pal_img_n; - if (req_comp >= 3) s->img_out_n = req_comp; - if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n)) - return 0; - } - else if (has_trans) { - // non-paletted image with tRNS -> source image has (constant) alpha - ++s->img_n; - } - STBI_FREE(z->expanded); z->expanded = NULL; - return 1; - } - - default: - // if critical, fail - if (first) return stbi__err("first not IHDR", "Corrupt PNG"); - if ((c.type & (1 << 29)) == 0) { -#ifndef STBI_NO_FAILURE_STRINGS - // not threadsafe - static char invalid_chunk[] = "XXXX PNG chunk not known"; - invalid_chunk[0] = STBI__BYTECAST(c.type >> 24); - invalid_chunk[1] = STBI__BYTECAST(c.type >> 16); - invalid_chunk[2] = STBI__BYTECAST(c.type >> 8); - invalid_chunk[3] = STBI__BYTECAST(c.type >> 0); -#endif - return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type"); - } - stbi__skip(s, c.length); - break; - } - // end of PNG chunk, read and skip CRC - stbi__get32be(s); - } -} - -static void* stbi__do_png(stbi__png* p, int* x, int* y, int* n, int req_comp, stbi__result_info* ri) -{ - void* result = NULL; - if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error"); - if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) { - if (p->depth < 8) - ri->bits_per_channel = 8; - else - ri->bits_per_channel = p->depth; - result = p->out; - p->out = NULL; - if (req_comp && req_comp != p->s->img_out_n) { - if (ri->bits_per_channel == 8) - result = stbi__convert_format((unsigned char*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - else - result = stbi__convert_format16((stbi__uint16*)result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y); - p->s->img_out_n = req_comp; - if (result == NULL) return result; - } - *x = p->s->img_x; - *y = p->s->img_y; - if (n)* n = p->s->img_n; - } - STBI_FREE(p->out); p->out = NULL; - STBI_FREE(p->expanded); p->expanded = NULL; - STBI_FREE(p->idata); p->idata = NULL; - - return result; -} - -static void* stbi__png_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi__png p; - p.s = s; - return stbi__do_png(&p, x, y, comp, req_comp, ri); -} - -static int stbi__png_test(stbi__context* s) -{ - int r; - r = stbi__check_png_header(s); - stbi__rewind(s); - return r; -} - -static int stbi__png_info_raw(stbi__png* p, int* x, int* y, int* comp) -{ - if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) { - stbi__rewind(p->s); - return 0; - } - if (x)* x = p->s->img_x; - if (y)* y = p->s->img_y; - if (comp)* comp = p->s->img_n; - return 1; -} - -static int stbi__png_info(stbi__context* s, int* x, int* y, int* comp) -{ - stbi__png p; - p.s = s; - return stbi__png_info_raw(&p, x, y, comp); -} - -static int stbi__png_is16(stbi__context* s) -{ - stbi__png p; - p.s = s; - if (!stbi__png_info_raw(&p, NULL, NULL, NULL)) - return 0; - if (p.depth != 16) { - stbi__rewind(p.s); - return 0; - } - return 1; -} -#endif - -// Microsoft/Windows BMP image - -#ifndef STBI_NO_BMP -static int stbi__bmp_test_raw(stbi__context* s) -{ - int r; - int sz; - if (stbi__get8(s) != 'B') return 0; - if (stbi__get8(s) != 'M') return 0; - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - stbi__get32le(s); // discard data offset - sz = stbi__get32le(s); - r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124); - return r; -} - -static int stbi__bmp_test(stbi__context* s) -{ - int r = stbi__bmp_test_raw(s); - stbi__rewind(s); - return r; -} - - -// returns 0..31 for the highest set bit -static int stbi__high_bit(unsigned int z) -{ - int n = 0; - if (z == 0) return -1; - if (z >= 0x10000) n += 16, z >>= 16; - if (z >= 0x00100) n += 8, z >>= 8; - if (z >= 0x00010) n += 4, z >>= 4; - if (z >= 0x00004) n += 2, z >>= 2; - if (z >= 0x00002) n += 1, z >>= 1; - return n; -} - -static int stbi__bitcount(unsigned int a) -{ - a = (a & 0x55555555) + ((a >> 1) & 0x55555555); // max 2 - a = (a & 0x33333333) + ((a >> 2) & 0x33333333); // max 4 - a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits - a = (a + (a >> 8)); // max 16 per 8 bits - a = (a + (a >> 16)); // max 32 per 8 bits - return a & 0xff; -} - -// extract an arbitrarily-aligned N-bit value (N=bits) -// from v, and then make it 8-bits long and fractionally -// extend it to full full range. -static int stbi__shiftsigned(int v, int shift, int bits) -{ - static unsigned int mul_table[9] = { - 0, - 0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/, - 0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/, - }; - static unsigned int shift_table[9] = { - 0, 0,0,1,0,2,4,6,0, - }; - if (shift < 0) - v <<= -shift; - else - v >>= shift; - STBI_ASSERT(v >= 0 && v < 256); - v >>= (8 - bits); - STBI_ASSERT(bits >= 0 && bits <= 8); - return (int)((unsigned)v * mul_table[bits]) >> shift_table[bits]; -} - -typedef struct -{ - int bpp, offset, hsz; - unsigned int mr, mg, mb, ma, all_a; -} stbi__bmp_data; - -static void* stbi__bmp_parse_header(stbi__context* s, stbi__bmp_data* info) -{ - int hsz; - if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP"); - stbi__get32le(s); // discard filesize - stbi__get16le(s); // discard reserved - stbi__get16le(s); // discard reserved - info->offset = stbi__get32le(s); - info->hsz = hsz = stbi__get32le(s); - info->mr = info->mg = info->mb = info->ma = 0; - - if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown"); - if (hsz == 12) { - s->img_x = stbi__get16le(s); - s->img_y = stbi__get16le(s); - } - else { - s->img_x = stbi__get32le(s); - s->img_y = stbi__get32le(s); - } - if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP"); - info->bpp = stbi__get16le(s); - if (hsz != 12) { - int compress = stbi__get32le(s); - if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE"); - stbi__get32le(s); // discard sizeof - stbi__get32le(s); // discard hres - stbi__get32le(s); // discard vres - stbi__get32le(s); // discard colorsused - stbi__get32le(s); // discard max important - if (hsz == 40 || hsz == 56) { - if (hsz == 56) { - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - stbi__get32le(s); - } - if (info->bpp == 16 || info->bpp == 32) { - if (compress == 0) { - if (info->bpp == 32) { - info->mr = 0xffu << 16; - info->mg = 0xffu << 8; - info->mb = 0xffu << 0; - info->ma = 0xffu << 24; - info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0 - } - else { - info->mr = 31u << 10; - info->mg = 31u << 5; - info->mb = 31u << 0; - } - } - else if (compress == 3) { - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - // not documented, but generated by photoshop and handled by mspaint - if (info->mr == info->mg && info->mg == info->mb) { - // ?!?!? - return stbi__errpuc("bad BMP", "bad BMP"); - } - } - else - return stbi__errpuc("bad BMP", "bad BMP"); - } - } - else { - int i; - if (hsz != 108 && hsz != 124) - return stbi__errpuc("bad BMP", "bad BMP"); - info->mr = stbi__get32le(s); - info->mg = stbi__get32le(s); - info->mb = stbi__get32le(s); - info->ma = stbi__get32le(s); - stbi__get32le(s); // discard color space - for (i = 0; i < 12; ++i) - stbi__get32le(s); // discard color space parameters - if (hsz == 124) { - stbi__get32le(s); // discard rendering intent - stbi__get32le(s); // discard offset of profile data - stbi__get32le(s); // discard size of profile data - stbi__get32le(s); // discard reserved - } - } - } - return (void*)1; -} - - -static void* stbi__bmp_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* out; - unsigned int mr = 0, mg = 0, mb = 0, ma = 0, all_a; - stbi_uc pal[256][4]; - int psize = 0, i, j, width; - int flip_vertically, pad, target; - stbi__bmp_data info; - STBI_NOTUSED(ri); - - info.all_a = 255; - if (stbi__bmp_parse_header(s, &info) == NULL) - return NULL; // error code already set - - flip_vertically = ((int)s->img_y) > 0; - s->img_y = abs((int)s->img_y); - - mr = info.mr; - mg = info.mg; - mb = info.mb; - ma = info.ma; - all_a = info.all_a; - - if (info.hsz == 12) { - if (info.bpp < 24) - psize = (info.offset - 14 - 24) / 3; - } - else { - if (info.bpp < 16) - psize = (info.offset - 14 - info.hsz) >> 2; - } - - s->img_n = ma ? 4 : 3; - if (req_comp && req_comp >= 3) // we can directly decode 3 or 4 - target = req_comp; - else - target = s->img_n; // if they want monochrome, we'll post-convert - - // sanity-check size - if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "Corrupt BMP"); - - out = (stbi_uc*)stbi__malloc_mad3(target, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - if (info.bpp < 16) { - int z = 0; - if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); } - for (i = 0; i < psize; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - if (info.hsz != 12) stbi__get8(s); - pal[i][3] = 255; - } - stbi__skip(s, info.offset - 14 - info.hsz - psize * (info.hsz == 12 ? 3 : 4)); - if (info.bpp == 1) width = (s->img_x + 7) >> 3; - else if (info.bpp == 4) width = (s->img_x + 1) >> 1; - else if (info.bpp == 8) width = s->img_x; - else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); } - pad = (-width) & 3; - if (info.bpp == 1) { - for (j = 0; j < (int)s->img_y; ++j) { - int bit_offset = 7, v = stbi__get8(s); - for (i = 0; i < (int)s->img_x; ++i) { - int color = (v >> bit_offset) & 0x1; - out[z++] = pal[color][0]; - out[z++] = pal[color][1]; - out[z++] = pal[color][2]; - if ((--bit_offset) < 0) { - bit_offset = 7; - v = stbi__get8(s); - } - } - stbi__skip(s, pad); - } - } - else { - for (j = 0; j < (int)s->img_y; ++j) { - for (i = 0; i < (int)s->img_x; i += 2) { - int v = stbi__get8(s), v2 = 0; - if (info.bpp == 4) { - v2 = v & 15; - v >>= 4; - } - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - if (i + 1 == (int)s->img_x) break; - v = (info.bpp == 8) ? stbi__get8(s) : v2; - out[z++] = pal[v][0]; - out[z++] = pal[v][1]; - out[z++] = pal[v][2]; - if (target == 4) out[z++] = 255; - } - stbi__skip(s, pad); - } - } - } - else { - int rshift = 0, gshift = 0, bshift = 0, ashift = 0, rcount = 0, gcount = 0, bcount = 0, acount = 0; - int z = 0; - int easy = 0; - stbi__skip(s, info.offset - 14 - info.hsz); - if (info.bpp == 24) width = 3 * s->img_x; - else if (info.bpp == 16) width = 2 * s->img_x; - else /* bpp = 32 and pad = 0 */ width = 0; - pad = (-width) & 3; - if (info.bpp == 24) { - easy = 1; - } - else if (info.bpp == 32) { - if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000) - easy = 2; - } - if (!easy) { - if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); } - // right shift amt to put high bit in position #7 - rshift = stbi__high_bit(mr) - 7; rcount = stbi__bitcount(mr); - gshift = stbi__high_bit(mg) - 7; gcount = stbi__bitcount(mg); - bshift = stbi__high_bit(mb) - 7; bcount = stbi__bitcount(mb); - ashift = stbi__high_bit(ma) - 7; acount = stbi__bitcount(ma); - } - for (j = 0; j < (int)s->img_y; ++j) { - if (easy) { - for (i = 0; i < (int)s->img_x; ++i) { - unsigned char a; - out[z + 2] = stbi__get8(s); - out[z + 1] = stbi__get8(s); - out[z + 0] = stbi__get8(s); - z += 3; - a = (easy == 2 ? stbi__get8(s) : 255); - all_a |= a; - if (target == 4) out[z++] = a; - } - } - else { - int bpp = info.bpp; - for (i = 0; i < (int)s->img_x; ++i) { - stbi__uint32 v = (bpp == 16 ? (stbi__uint32)stbi__get16le(s) : stbi__get32le(s)); - unsigned int a; - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount)); - out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount)); - a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255); - all_a |= a; - if (target == 4) out[z++] = STBI__BYTECAST(a); - } - } - stbi__skip(s, pad); - } - } - - // if alpha channel is all 0s, replace with all 255s - if (target == 4 && all_a == 0) - for (i = 4 * s->img_x * s->img_y - 1; i >= 0; i -= 4) - out[i] = 255; - - if (flip_vertically) { - stbi_uc t; - for (j = 0; j < (int)s->img_y >> 1; ++j) { - stbi_uc* p1 = out + j * s->img_x * target; - stbi_uc* p2 = out + (s->img_y - 1 - j) * s->img_x * target; - for (i = 0; i < (int)s->img_x * target; ++i) { - t = p1[i], p1[i] = p2[i], p2[i] = t; - } - } - } - - if (req_comp && req_comp != target) { - out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - *x = s->img_x; - *y = s->img_y; - if (comp)* comp = s->img_n; - return out; -} -#endif - -// Targa Truevision - TGA -// by Jonathan Dummer -#ifndef STBI_NO_TGA -// returns STBI_rgb or whatever, 0 on error -static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16) -{ - // only RGB or RGBA (incl. 16bit) or grey allowed - if (is_rgb16)* is_rgb16 = 0; - switch (bits_per_pixel) { - case 8: return STBI_grey; - case 16: if (is_grey) return STBI_grey_alpha; - // fallthrough - case 15: if (is_rgb16) * is_rgb16 = 1; - return STBI_rgb; - case 24: // fallthrough - case 32: return bits_per_pixel / 8; - default: return 0; - } -} - -static int stbi__tga_info(stbi__context* s, int* x, int* y, int* comp) -{ - int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp; - int sz, tga_colormap_type; - stbi__get8(s); // discard Offset - tga_colormap_type = stbi__get8(s); // colormap type - if (tga_colormap_type > 1) { - stbi__rewind(s); - return 0; // only RGB or indexed allowed - } - tga_image_type = stbi__get8(s); // image type - if (tga_colormap_type == 1) { // colormapped (paletted) image - if (tga_image_type != 1 && tga_image_type != 9) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 4); // skip image x and y origin - tga_colormap_bpp = sz; - } - else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE - if ((tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11)) { - stbi__rewind(s); - return 0; // only RGB or grey allowed, +/- RLE - } - stbi__skip(s, 9); // skip colormap specification and image x/y origin - tga_colormap_bpp = 0; - } - tga_w = stbi__get16le(s); - if (tga_w < 1) { - stbi__rewind(s); - return 0; // test width - } - tga_h = stbi__get16le(s); - if (tga_h < 1) { - stbi__rewind(s); - return 0; // test height - } - tga_bits_per_pixel = stbi__get8(s); // bits per pixel - stbi__get8(s); // ignore alpha bits - if (tga_colormap_bpp != 0) { - if ((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) { - // when using a colormap, tga_bits_per_pixel is the size of the indexes - // I don't think anything but 8 or 16bit indexes makes sense - stbi__rewind(s); - return 0; - } - tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL); - } - else { - tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL); - } - if (!tga_comp) { - stbi__rewind(s); - return 0; - } - if (x)* x = tga_w; - if (y)* y = tga_h; - if (comp)* comp = tga_comp; - return 1; // seems to have passed everything -} - -static int stbi__tga_test(stbi__context* s) -{ - int res = 0; - int sz, tga_color_type; - stbi__get8(s); // discard Offset - tga_color_type = stbi__get8(s); // color type - if (tga_color_type > 1) goto errorEnd; // only RGB or indexed allowed - sz = stbi__get8(s); // image type - if (tga_color_type == 1) { // colormapped (paletted) image - if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9 - stbi__skip(s, 4); // skip index of first colormap entry and number of entries - sz = stbi__get8(s); // check bits per palette color entry - if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) goto errorEnd; - stbi__skip(s, 4); // skip image x and y origin - } - else { // "normal" image w/o colormap - if ((sz != 2) && (sz != 3) && (sz != 10) && (sz != 11)) goto errorEnd; // only RGB or grey allowed, +/- RLE - stbi__skip(s, 9); // skip colormap specification and image x/y origin - } - if (stbi__get16le(s) < 1) goto errorEnd; // test width - if (stbi__get16le(s) < 1) goto errorEnd; // test height - sz = stbi__get8(s); // bits per pixel - if ((tga_color_type == 1) && (sz != 8) && (sz != 16)) goto errorEnd; // for colormapped images, bpp is size of an index - if ((sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32)) goto errorEnd; - - res = 1; // if we got this far, everything's good and we can return 1 instead of 0 - -errorEnd: - stbi__rewind(s); - return res; -} - -// read 16bit value and convert to 24bit RGB -static void stbi__tga_read_rgb16(stbi__context* s, stbi_uc* out) -{ - stbi__uint16 px = (stbi__uint16)stbi__get16le(s); - stbi__uint16 fiveBitMask = 31; - // we have 3 channels with 5bits each - int r = (px >> 10) & fiveBitMask; - int g = (px >> 5) & fiveBitMask; - int b = px & fiveBitMask; - // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later - out[0] = (stbi_uc)((r * 255) / 31); - out[1] = (stbi_uc)((g * 255) / 31); - out[2] = (stbi_uc)((b * 255) / 31); - - // some people claim that the most significant bit might be used for alpha - // (possibly if an alpha-bit is set in the "image descriptor byte") - // but that only made 16bit test images completely translucent.. - // so let's treat all 15 and 16bit TGAs as RGB with no alpha. -} - -static void* stbi__tga_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - // read in the TGA header stuff - int tga_offset = stbi__get8(s); - int tga_indexed = stbi__get8(s); - int tga_image_type = stbi__get8(s); - int tga_is_RLE = 0; - int tga_palette_start = stbi__get16le(s); - int tga_palette_len = stbi__get16le(s); - int tga_palette_bits = stbi__get8(s); - int tga_x_origin = stbi__get16le(s); - int tga_y_origin = stbi__get16le(s); - int tga_width = stbi__get16le(s); - int tga_height = stbi__get16le(s); - int tga_bits_per_pixel = stbi__get8(s); - int tga_comp, tga_rgb16 = 0; - int tga_inverted = stbi__get8(s); - // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?) - // image data - unsigned char* tga_data; - unsigned char* tga_palette = NULL; - int i, j; - unsigned char raw_data[4] = { 0 }; - int RLE_count = 0; - int RLE_repeating = 0; - int read_next_pixel = 1; - STBI_NOTUSED(ri); - - // do a tiny bit of precessing - if (tga_image_type >= 8) - { - tga_image_type -= 8; - tga_is_RLE = 1; - } - tga_inverted = 1 - ((tga_inverted >> 5) & 1); - - // If I'm paletted, then I'll use the number of bits from the palette - if (tga_indexed) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16); - else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16); - - if (!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency - return stbi__errpuc("bad format", "Can't find out TGA pixelformat"); - - // tga info - *x = tga_width; - *y = tga_height; - if (comp)* comp = tga_comp; - - if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0)) - return stbi__errpuc("too large", "Corrupt TGA"); - - tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0); - if (!tga_data) return stbi__errpuc("outofmem", "Out of memory"); - - // skip to the data's starting position (offset usually = 0) - stbi__skip(s, tga_offset); - - if (!tga_indexed && !tga_is_RLE && !tga_rgb16) { - for (i = 0; i < tga_height; ++i) { - int row = tga_inverted ? tga_height - i - 1 : i; - stbi_uc* tga_row = tga_data + row * tga_width * tga_comp; - stbi__getn(s, tga_row, tga_width * tga_comp); - } - } - else { - // do I need to load a palette? - if (tga_indexed) - { - // any data to skip? (offset usually = 0) - stbi__skip(s, tga_palette_start); - // load the palette - tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0); - if (!tga_palette) { - STBI_FREE(tga_data); - return stbi__errpuc("outofmem", "Out of memory"); - } - if (tga_rgb16) { - stbi_uc* pal_entry = tga_palette; - STBI_ASSERT(tga_comp == STBI_rgb); - for (i = 0; i < tga_palette_len; ++i) { - stbi__tga_read_rgb16(s, pal_entry); - pal_entry += tga_comp; - } - } - else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) { - STBI_FREE(tga_data); - STBI_FREE(tga_palette); - return stbi__errpuc("bad palette", "Corrupt TGA"); - } - } - // load the data - for (i = 0; i < tga_width * tga_height; ++i) - { - // if I'm in RLE mode, do I need to get a RLE stbi__pngchunk? - if (tga_is_RLE) - { - if (RLE_count == 0) - { - // yep, get the next byte as a RLE command - int RLE_cmd = stbi__get8(s); - RLE_count = 1 + (RLE_cmd & 127); - RLE_repeating = RLE_cmd >> 7; - read_next_pixel = 1; - } - else if (!RLE_repeating) - { - read_next_pixel = 1; - } - } - else - { - read_next_pixel = 1; - } - // OK, if I need to read a pixel, do it now - if (read_next_pixel) - { - // load however much data we did have - if (tga_indexed) - { - // read in index, then perform the lookup - int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s); - if (pal_idx >= tga_palette_len) { - // invalid index - pal_idx = 0; - } - pal_idx *= tga_comp; - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = tga_palette[pal_idx + j]; - } - } - else if (tga_rgb16) { - STBI_ASSERT(tga_comp == STBI_rgb); - stbi__tga_read_rgb16(s, raw_data); - } - else { - // read in the data raw - for (j = 0; j < tga_comp; ++j) { - raw_data[j] = stbi__get8(s); - } - } - // clear the reading flag for the next pixel - read_next_pixel = 0; - } // end of reading a pixel - - // copy data - for (j = 0; j < tga_comp; ++j) - tga_data[i * tga_comp + j] = raw_data[j]; - - // in case we're in RLE mode, keep counting down - --RLE_count; - } - // do I need to invert the image? - if (tga_inverted) - { - for (j = 0; j * 2 < tga_height; ++j) - { - int index1 = j * tga_width * tga_comp; - int index2 = (tga_height - 1 - j) * tga_width * tga_comp; - for (i = tga_width * tga_comp; i > 0; --i) - { - unsigned char temp = tga_data[index1]; - tga_data[index1] = tga_data[index2]; - tga_data[index2] = temp; - ++index1; - ++index2; - } - } - } - // clear my palette, if I had one - if (tga_palette != NULL) - { - STBI_FREE(tga_palette); - } - } - - // swap RGB - if the source data was RGB16, it already is in the right order - if (tga_comp >= 3 && !tga_rgb16) - { - unsigned char* tga_pixel = tga_data; - for (i = 0; i < tga_width * tga_height; ++i) - { - unsigned char temp = tga_pixel[0]; - tga_pixel[0] = tga_pixel[2]; - tga_pixel[2] = temp; - tga_pixel += tga_comp; - } - } - - // convert to target component count - if (req_comp && req_comp != tga_comp) - tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height); - - // the things I do to get rid of an error message, and yet keep - // Microsoft's C compilers happy... [8^( - tga_palette_start = tga_palette_len = tga_palette_bits = - tga_x_origin = tga_y_origin = 0; - // OK, done - return tga_data; -} -#endif - -// ************************************************************************************************* -// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB - -#ifndef STBI_NO_PSD -static int stbi__psd_test(stbi__context* s) -{ - int r = (stbi__get32be(s) == 0x38425053); - stbi__rewind(s); - return r; -} - -static int stbi__psd_decode_rle(stbi__context* s, stbi_uc* p, int pixelCount) -{ - int count, nleft, len; - - count = 0; - while ((nleft = pixelCount - count) > 0) { - len = stbi__get8(s); - if (len == 128) { - // No-op. - } - else if (len < 128) { - // Copy next len+1 bytes literally. - len++; - if (len > nleft) return 0; // corrupt data - count += len; - while (len) { - *p = stbi__get8(s); - p += 4; - len--; - } - } - else if (len > 128) { - stbi_uc val; - // Next -len+1 bytes in the dest are replicated from next source byte. - // (Interpret len as a negative 8-bit int.) - len = 257 - len; - if (len > nleft) return 0; // corrupt data - val = stbi__get8(s); - count += len; - while (len) { - *p = val; - p += 4; - len--; - } - } - } - - return 1; -} - -static void* stbi__psd_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri, int bpc) -{ - int pixelCount; - int channelCount, compression; - int channel, i; - int bitdepth; - int w, h; - stbi_uc* out; - STBI_NOTUSED(ri); - - // Check identifier - if (stbi__get32be(s) != 0x38425053) // "8BPS" - return stbi__errpuc("not PSD", "Corrupt PSD image"); - - // Check file type version. - if (stbi__get16be(s) != 1) - return stbi__errpuc("wrong version", "Unsupported version of PSD image"); - - // Skip 6 reserved bytes. - stbi__skip(s, 6); - - // Read the number of channels (R, G, B, A, etc). - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) - return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image"); - - // Read the rows and columns of the image. - h = stbi__get32be(s); - w = stbi__get32be(s); - - // Make sure the depth is 8 bits. - bitdepth = stbi__get16be(s); - if (bitdepth != 8 && bitdepth != 16) - return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit"); - - // Make sure the color mode is RGB. - // Valid options are: - // 0: Bitmap - // 1: Grayscale - // 2: Indexed color - // 3: RGB color - // 4: CMYK color - // 7: Multichannel - // 8: Duotone - // 9: Lab color - if (stbi__get16be(s) != 3) - return stbi__errpuc("wrong color format", "PSD is not in RGB color format"); - - // Skip the Mode Data. (It's the palette for indexed color; other info for other modes.) - stbi__skip(s, stbi__get32be(s)); - - // Skip the image resources. (resolution, pen tool paths, etc) - stbi__skip(s, stbi__get32be(s)); - - // Skip the reserved data. - stbi__skip(s, stbi__get32be(s)); - - // Find out if the data is compressed. - // Known values: - // 0: no compression - // 1: RLE compressed - compression = stbi__get16be(s); - if (compression > 1) - return stbi__errpuc("bad compression", "PSD has an unknown compression format"); - - // Check size - if (!stbi__mad3sizes_valid(4, w, h, 0)) - return stbi__errpuc("too large", "Corrupt PSD"); - - // Create the destination image. - - if (!compression && bitdepth == 16 && bpc == 16) { - out = (stbi_uc*)stbi__malloc_mad3(8, w, h, 0); - ri->bits_per_channel = 16; - } - else - out = (stbi_uc*)stbi__malloc(4 * w * h); - - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - pixelCount = w * h; - - // Initialize the data to zero. - //memset( out, 0, pixelCount * 4 ); - - // Finally, the image data. - if (compression) { - // RLE as used by .PSD and .TIFF - // Loop until you get the number of unpacked bytes you are expecting: - // Read the next source byte into n. - // If n is between 0 and 127 inclusive, copy the next n+1 bytes literally. - // Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times. - // Else if n is 128, noop. - // Endloop - - // The RLE-compressed data is preceeded by a 2-byte data count for each row in the data, - // which we're going to just skip. - stbi__skip(s, h * channelCount * 2); - - // Read the RLE data by channel. - for (channel = 0; channel < 4; channel++) { - stbi_uc* p; - - p = out + channel; - if (channel >= channelCount) { - // Fill this channel with default data. - for (i = 0; i < pixelCount; i++, p += 4) - * p = (channel == 3 ? 255 : 0); - } - else { - // Read the RLE data. - if (!stbi__psd_decode_rle(s, p, pixelCount)) { - STBI_FREE(out); - return stbi__errpuc("corrupt", "bad RLE data"); - } - } - } - - } - else { - // We're at the raw image data. It's each channel in order (Red, Green, Blue, Alpha, ...) - // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image. - - // Read the data by channel. - for (channel = 0; channel < 4; channel++) { - if (channel >= channelCount) { - // Fill this channel with default data. - if (bitdepth == 16 && bpc == 16) { - stbi__uint16* q = ((stbi__uint16*)out) + channel; - stbi__uint16 val = channel == 3 ? 65535 : 0; - for (i = 0; i < pixelCount; i++, q += 4) - * q = val; - } - else { - stbi_uc* p = out + channel; - stbi_uc val = channel == 3 ? 255 : 0; - for (i = 0; i < pixelCount; i++, p += 4) - * p = val; - } - } - else { - if (ri->bits_per_channel == 16) { // output bpc - stbi__uint16* q = ((stbi__uint16*)out) + channel; - for (i = 0; i < pixelCount; i++, q += 4) - * q = (stbi__uint16)stbi__get16be(s); - } - else { - stbi_uc* p = out + channel; - if (bitdepth == 16) { // input bpc - for (i = 0; i < pixelCount; i++, p += 4) - * p = (stbi_uc)(stbi__get16be(s) >> 8); - } - else { - for (i = 0; i < pixelCount; i++, p += 4) - * p = stbi__get8(s); - } - } - } - } - } - - // remove weird white matte from PSD - if (channelCount >= 4) { - if (ri->bits_per_channel == 16) { - for (i = 0; i < w * h; ++i) { - stbi__uint16* pixel = (stbi__uint16*)out + 4 * i; - if (pixel[3] != 0 && pixel[3] != 65535) { - float a = pixel[3] / 65535.0f; - float ra = 1.0f / a; - float inv_a = 65535.0f * (1 - ra); - pixel[0] = (stbi__uint16)(pixel[0] * ra + inv_a); - pixel[1] = (stbi__uint16)(pixel[1] * ra + inv_a); - pixel[2] = (stbi__uint16)(pixel[2] * ra + inv_a); - } - } - } - else { - for (i = 0; i < w * h; ++i) { - unsigned char* pixel = out + 4 * i; - if (pixel[3] != 0 && pixel[3] != 255) { - float a = pixel[3] / 255.0f; - float ra = 1.0f / a; - float inv_a = 255.0f * (1 - ra); - pixel[0] = (unsigned char)(pixel[0] * ra + inv_a); - pixel[1] = (unsigned char)(pixel[1] * ra + inv_a); - pixel[2] = (unsigned char)(pixel[2] * ra + inv_a); - } - } - } - } - - // convert to desired output format - if (req_comp && req_comp != 4) { - if (ri->bits_per_channel == 16) - out = (stbi_uc*)stbi__convert_format16((stbi__uint16*)out, 4, req_comp, w, h); - else - out = stbi__convert_format(out, 4, req_comp, w, h); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - - if (comp)* comp = 4; - *y = h; - *x = w; - - return out; -} -#endif - -// ************************************************************************************************* -// Softimage PIC loader -// by Tom Seddon -// -// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format -// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/ - -#ifndef STBI_NO_PIC -static int stbi__pic_is4(stbi__context* s, const char* str) -{ - int i; - for (i = 0; i < 4; ++i) - if (stbi__get8(s) != (stbi_uc)str[i]) - return 0; - - return 1; -} - -static int stbi__pic_test_core(stbi__context* s) -{ - int i; - - if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) - return 0; - - for (i = 0; i < 84; ++i) - stbi__get8(s); - - if (!stbi__pic_is4(s, "PICT")) - return 0; - - return 1; -} - -typedef struct -{ - stbi_uc size, type, channel; -} stbi__pic_packet; - -static stbi_uc* stbi__readval(stbi__context* s, int channel, stbi_uc* dest) -{ - int mask = 0x80, i; - - for (i = 0; i < 4; ++i, mask >>= 1) { - if (channel & mask) { - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "PIC file too short"); - dest[i] = stbi__get8(s); - } - } - - return dest; -} - -static void stbi__copyval(int channel, stbi_uc* dest, const stbi_uc* src) -{ - int mask = 0x80, i; - - for (i = 0; i < 4; ++i, mask >>= 1) - if (channel & mask) - dest[i] = src[i]; -} - -static stbi_uc* stbi__pic_load_core(stbi__context* s, int width, int height, int* comp, stbi_uc* result) -{ - int act_comp = 0, num_packets = 0, y, chained; - stbi__pic_packet packets[10]; - - // this will (should...) cater for even some bizarre stuff like having data - // for the same channel in multiple packets. - do { - stbi__pic_packet* packet; - - if (num_packets == sizeof(packets) / sizeof(packets[0])) - return stbi__errpuc("bad format", "too many packets"); - - packet = &packets[num_packets++]; - - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - - act_comp |= packet->channel; - - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (reading packets)"); - if (packet->size != 8) return stbi__errpuc("bad format", "packet isn't 8bpp"); - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel? - - for (y = 0; y < height; ++y) { - int packet_idx; - - for (packet_idx = 0; packet_idx < num_packets; ++packet_idx) { - stbi__pic_packet* packet = &packets[packet_idx]; - stbi_uc* dest = result + y * width * 4; - - switch (packet->type) { - default: - return stbi__errpuc("bad format", "packet has bad compression type"); - - case 0: {//uncompressed - int x; - - for (x = 0; x < width; ++x, dest += 4) - if (!stbi__readval(s, packet->channel, dest)) - return 0; - break; - } - - case 1://Pure RLE - { - int left = width, i; - - while (left > 0) { - stbi_uc count, value[4]; - - count = stbi__get8(s); - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (pure read count)"); - - if (count > left) - count = (stbi_uc)left; - - if (!stbi__readval(s, packet->channel, value)) return 0; - - for (i = 0; i < count; ++i, dest += 4) - stbi__copyval(packet->channel, dest, value); - left -= count; - } - } - break; - - case 2: {//Mixed RLE - int left = width; - while (left > 0) { - int count = stbi__get8(s), i; - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (mixed read count)"); - - if (count >= 128) { // Repeated - stbi_uc value[4]; - - if (count == 128) - count = stbi__get16be(s); - else - count -= 127; - if (count > left) - return stbi__errpuc("bad file", "scanline overrun"); - - if (!stbi__readval(s, packet->channel, value)) - return 0; - - for (i = 0; i < count; ++i, dest += 4) - stbi__copyval(packet->channel, dest, value); - } - else { // Raw - ++count; - if (count > left) return stbi__errpuc("bad file", "scanline overrun"); - - for (i = 0; i < count; ++i, dest += 4) - if (!stbi__readval(s, packet->channel, dest)) - return 0; - } - left -= count; - } - break; - } - } - } - } - - return result; -} - -static void* stbi__pic_load(stbi__context* s, int* px, int* py, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* result; - int i, x, y, internal_comp; - STBI_NOTUSED(ri); - - if (!comp) comp = &internal_comp; - - for (i = 0; i < 92; ++i) - stbi__get8(s); - - x = stbi__get16be(s); - y = stbi__get16be(s); - if (stbi__at_eof(s)) return stbi__errpuc("bad file", "file too short (pic header)"); - if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode"); - - stbi__get32be(s); //skip `ratio' - stbi__get16be(s); //skip `fields' - stbi__get16be(s); //skip `pad' - - // intermediate buffer is RGBA - result = (stbi_uc*)stbi__malloc_mad3(x, y, 4, 0); - memset(result, 0xff, x * y * 4); - - if (!stbi__pic_load_core(s, x, y, comp, result)) { - STBI_FREE(result); - result = 0; - } - *px = x; - *py = y; - if (req_comp == 0) req_comp = *comp; - result = stbi__convert_format(result, 4, req_comp, x, y); - - return result; -} - -static int stbi__pic_test(stbi__context* s) -{ - int r = stbi__pic_test_core(s); - stbi__rewind(s); - return r; -} -#endif - -// ************************************************************************************************* -// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb - -#ifndef STBI_NO_GIF -typedef struct -{ - stbi__int16 prefix; - stbi_uc first; - stbi_uc suffix; -} stbi__gif_lzw; - -typedef struct -{ - int w, h; - stbi_uc* out; // output buffer (always 4 components) - stbi_uc* background; // The current "background" as far as a gif is concerned - stbi_uc* history; - int flags, bgindex, ratio, transparent, eflags; - stbi_uc pal[256][4]; - stbi_uc lpal[256][4]; - stbi__gif_lzw codes[8192]; - stbi_uc* color_table; - int parse, step; - int lflags; - int start_x, start_y; - int max_x, max_y; - int cur_x, cur_y; - int line_size; - int delay; -} stbi__gif; - -static int stbi__gif_test_raw(stbi__context* s) -{ - int sz; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0; - sz = stbi__get8(s); - if (sz != '9' && sz != '7') return 0; - if (stbi__get8(s) != 'a') return 0; - return 1; -} - -static int stbi__gif_test(stbi__context* s) -{ - int r = stbi__gif_test_raw(s); - stbi__rewind(s); - return r; -} - -static void stbi__gif_parse_colortable(stbi__context* s, stbi_uc pal[256][4], int num_entries, int transp) -{ - int i; - for (i = 0; i < num_entries; ++i) { - pal[i][2] = stbi__get8(s); - pal[i][1] = stbi__get8(s); - pal[i][0] = stbi__get8(s); - pal[i][3] = transp == i ? 0 : 255; - } -} - -static int stbi__gif_header(stbi__context* s, stbi__gif* g, int* comp, int is_info) -{ - stbi_uc version; - if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') - return stbi__err("not GIF", "Corrupt GIF"); - - version = stbi__get8(s); - if (version != '7' && version != '9') return stbi__err("not GIF", "Corrupt GIF"); - if (stbi__get8(s) != 'a') return stbi__err("not GIF", "Corrupt GIF"); - - stbi__g_failure_reason = ""; - g->w = stbi__get16le(s); - g->h = stbi__get16le(s); - g->flags = stbi__get8(s); - g->bgindex = stbi__get8(s); - g->ratio = stbi__get8(s); - g->transparent = -1; - - if (comp != 0)* comp = 4; // can't actually tell whether it's 3 or 4 until we parse the comments - - if (is_info) return 1; - - if (g->flags & 0x80) - stbi__gif_parse_colortable(s, g->pal, 2 << (g->flags & 7), -1); - - return 1; -} - -static int stbi__gif_info_raw(stbi__context* s, int* x, int* y, int* comp) -{ - stbi__gif* g = (stbi__gif*)stbi__malloc(sizeof(stbi__gif)); - if (!stbi__gif_header(s, g, comp, 1)) { - STBI_FREE(g); - stbi__rewind(s); - return 0; - } - if (x)* x = g->w; - if (y)* y = g->h; - STBI_FREE(g); - return 1; -} - -static void stbi__out_gif_code(stbi__gif* g, stbi__uint16 code) -{ - stbi_uc* p, * c; - int idx; - - // recurse to decode the prefixes, since the linked-list is backwards, - // and working backwards through an interleaved image would be nasty - if (g->codes[code].prefix >= 0) - stbi__out_gif_code(g, g->codes[code].prefix); - - if (g->cur_y >= g->max_y) return; - - idx = g->cur_x + g->cur_y; - p = &g->out[idx]; - g->history[idx / 4] = 1; - - c = &g->color_table[g->codes[code].suffix * 4]; - if (c[3] > 128) { // don't render transparent pixels; - p[0] = c[2]; - p[1] = c[1]; - p[2] = c[0]; - p[3] = c[3]; - } - g->cur_x += 4; - - if (g->cur_x >= g->max_x) { - g->cur_x = g->start_x; - g->cur_y += g->step; - - while (g->cur_y >= g->max_y && g->parse > 0) { - g->step = (1 << g->parse) * g->line_size; - g->cur_y = g->start_y + (g->step >> 1); - --g->parse; - } - } -} - -static stbi_uc* stbi__process_gif_raster(stbi__context* s, stbi__gif* g) -{ - stbi_uc lzw_cs; - stbi__int32 len, init_code; - stbi__uint32 first; - stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear; - stbi__gif_lzw* p; - - lzw_cs = stbi__get8(s); - if (lzw_cs > 12) return NULL; - clear = 1 << lzw_cs; - first = 1; - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - bits = 0; - valid_bits = 0; - for (init_code = 0; init_code < clear; init_code++) { - g->codes[init_code].prefix = -1; - g->codes[init_code].first = (stbi_uc)init_code; - g->codes[init_code].suffix = (stbi_uc)init_code; - } - - // support no starting clear code - avail = clear + 2; - oldcode = -1; - - len = 0; - for (;;) { - if (valid_bits < codesize) { - if (len == 0) { - len = stbi__get8(s); // start new block - if (len == 0) - return g->out; - } - --len; - bits |= (stbi__int32)stbi__get8(s) << valid_bits; - valid_bits += 8; - } - else { - stbi__int32 code = bits & codemask; - bits >>= codesize; - valid_bits -= codesize; - // @OPTIMIZE: is there some way we can accelerate the non-clear path? - if (code == clear) { // clear code - codesize = lzw_cs + 1; - codemask = (1 << codesize) - 1; - avail = clear + 2; - oldcode = -1; - first = 0; - } - else if (code == clear + 1) { // end of stream code - stbi__skip(s, len); - while ((len = stbi__get8(s)) > 0) - stbi__skip(s, len); - return g->out; - } - else if (code <= avail) { - if (first) { - return stbi__errpuc("no clear code", "Corrupt GIF"); - } - - if (oldcode >= 0) { - p = &g->codes[avail++]; - if (avail > 8192) { - return stbi__errpuc("too many codes", "Corrupt GIF"); - } - - p->prefix = (stbi__int16)oldcode; - p->first = g->codes[oldcode].first; - p->suffix = (code == avail) ? p->first : g->codes[code].first; - } - else if (code == avail) - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - - stbi__out_gif_code(g, (stbi__uint16)code); - - if ((avail & codemask) == 0 && avail <= 0x0FFF) { - codesize++; - codemask = (1 << codesize) - 1; - } - - oldcode = code; - } - else { - return stbi__errpuc("illegal code in raster", "Corrupt GIF"); - } - } - } -} - -// this function is designed to support animated gifs, although stb_image doesn't support it -// two back is the image from two frames ago, used for a very specific disposal format -static stbi_uc* stbi__gif_load_next(stbi__context* s, stbi__gif* g, int* comp, int req_comp, stbi_uc* two_back) -{ - int dispose; - int first_frame; - int pi; - int pcount; - - // on first frame, any non-written pixels get the background colour (non-transparent) - first_frame = 0; - if (g->out == 0) { - if (!stbi__gif_header(s, g, comp, 0)) return 0; // stbi__g_failure_reason set by stbi__gif_header - g->out = (stbi_uc*)stbi__malloc(4 * g->w * g->h); - g->background = (stbi_uc*)stbi__malloc(4 * g->w * g->h); - g->history = (stbi_uc*)stbi__malloc(g->w * g->h); - if (g->out == 0) return stbi__errpuc("outofmem", "Out of memory"); - - // image is treated as "tranparent" at the start - ie, nothing overwrites the current background; - // background colour is only used for pixels that are not rendered first frame, after that "background" - // color refers to teh color that was there the previous frame. - memset(g->out, 0x00, 4 * g->w * g->h); - memset(g->background, 0x00, 4 * g->w * g->h); // state of the background (starts transparent) - memset(g->history, 0x00, g->w * g->h); // pixels that were affected previous frame - first_frame = 1; - } - else { - // second frame - how do we dispoase of the previous one? - dispose = (g->eflags & 0x1C) >> 2; - pcount = g->w * g->h; - - if ((dispose == 3) && (two_back == 0)) { - dispose = 2; // if I don't have an image to revert back to, default to the old background - } - - if (dispose == 3) { // use previous graphic - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy(&g->out[pi * 4], &two_back[pi * 4], 4); - } - } - } - else if (dispose == 2) { - // restore what was changed last frame to background before that frame; - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi]) { - memcpy(&g->out[pi * 4], &g->background[pi * 4], 4); - } - } - } - else { - // This is a non-disposal case eithe way, so just - // leave the pixels as is, and they will become the new background - // 1: do not dispose - // 0: not specified. - } - - // background is what out is after the undoing of the previou frame; - memcpy(g->background, g->out, 4 * g->w * g->h); - } - - // clear my history; - memset(g->history, 0x00, g->w * g->h); // pixels that were affected previous frame - - for (;;) { - int tag = stbi__get8(s); - switch (tag) { - case 0x2C: /* Image Descriptor */ - { - stbi__int32 x, y, w, h; - stbi_uc* o; - - x = stbi__get16le(s); - y = stbi__get16le(s); - w = stbi__get16le(s); - h = stbi__get16le(s); - if (((x + w) > (g->w)) || ((y + h) > (g->h))) - return stbi__errpuc("bad Image Descriptor", "Corrupt GIF"); - - g->line_size = g->w * 4; - g->start_x = x * 4; - g->start_y = y * g->line_size; - g->max_x = g->start_x + w * 4; - g->max_y = g->start_y + h * g->line_size; - g->cur_x = g->start_x; - g->cur_y = g->start_y; - - g->lflags = stbi__get8(s); - - if (g->lflags & 0x40) { - g->step = 8 * g->line_size; // first interlaced spacing - g->parse = 3; - } - else { - g->step = g->line_size; - g->parse = 0; - } - - if (g->lflags & 0x80) { - stbi__gif_parse_colortable(s, g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1); - g->color_table = (stbi_uc*)g->lpal; - } - else if (g->flags & 0x80) { - g->color_table = (stbi_uc*)g->pal; - } - else - return stbi__errpuc("missing color table", "Corrupt GIF"); - - o = stbi__process_gif_raster(s, g); - if (o == NULL) return NULL; - - // if this was the first frame, - pcount = g->w * g->h; - if (first_frame && (g->bgindex > 0)) { - // if first frame, any pixel not drawn to gets the background color - for (pi = 0; pi < pcount; ++pi) { - if (g->history[pi] == 0) { - g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be; - memcpy(&g->out[pi * 4], &g->pal[g->bgindex], 4); - } - } - } - - return o; - } - - case 0x21: // Comment Extension. - { - int len; - int ext = stbi__get8(s); - if (ext == 0xF9) { // Graphic Control Extension. - len = stbi__get8(s); - if (len == 4) { - g->eflags = stbi__get8(s); - g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths. - - // unset old transparent - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 255; - } - if (g->eflags & 0x01) { - g->transparent = stbi__get8(s); - if (g->transparent >= 0) { - g->pal[g->transparent][3] = 0; - } - } - else { - // don't need transparent - stbi__skip(s, 1); - g->transparent = -1; - } - } - else { - stbi__skip(s, len); - break; - } - } - while ((len = stbi__get8(s)) != 0) { - stbi__skip(s, len); - } - break; - } - - case 0x3B: // gif stream termination code - return (stbi_uc*)s; // using '1' causes warning on some compilers - - default: - return stbi__errpuc("unknown code", "Corrupt GIF"); - } - } -} - -static void* stbi__load_gif_main(stbi__context* s, int** delays, int* x, int* y, int* z, int* comp, int req_comp) -{ - if (stbi__gif_test(s)) { - int layers = 0; - stbi_uc* u = 0; - stbi_uc* out = 0; - stbi_uc* two_back = 0; - stbi__gif g; - int stride; - memset(&g, 0, sizeof(g)); - if (delays) { - *delays = 0; - } - - do { - u = stbi__gif_load_next(s, &g, comp, req_comp, two_back); - if (u == (stbi_uc*)s) u = 0; // end of animated gif marker - - if (u) { - *x = g.w; - *y = g.h; - ++layers; - stride = g.w * g.h * 4; - - if (out) { - out = (stbi_uc*)STBI_REALLOC(out, layers * stride); - if (delays) { - *delays = (int*)STBI_REALLOC(*delays, sizeof(int) * layers); - } - } - else { - out = (stbi_uc*)stbi__malloc(layers * stride); - if (delays) { - *delays = (int*)stbi__malloc(layers * sizeof(int)); - } - } - memcpy(out + ((layers - 1) * stride), u, stride); - if (layers >= 2) { - two_back = out - 2 * stride; - } - - if (delays) { - (*delays)[layers - 1U] = g.delay; - } - } - } while (u != 0); - - // free temp buffer; - STBI_FREE(g.out); - STBI_FREE(g.history); - STBI_FREE(g.background); - - // do the final conversion after loading everything; - if (req_comp && req_comp != 4) - out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h); - - *z = layers; - return out; - } - else { - return stbi__errpuc("not GIF", "Image was not as a gif type."); - } -} - -static void* stbi__gif_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* u = 0; - stbi__gif g; - memset(&g, 0, sizeof(g)); - - u = stbi__gif_load_next(s, &g, comp, req_comp, 0); - if (u == (stbi_uc*)s) u = 0; // end of animated gif marker - if (u) { - *x = g.w; - *y = g.h; - - // moved conversion to after successful load so that the same - // can be done for multiple frames. - if (req_comp && req_comp != 4) - u = stbi__convert_format(u, 4, req_comp, g.w, g.h); - } - - // free buffers needed for multiple frame loading; - STBI_FREE(g.history); - STBI_FREE(g.background); - - return u; -} - -static int stbi__gif_info(stbi__context* s, int* x, int* y, int* comp) -{ - return stbi__gif_info_raw(s, x, y, comp); -} -#endif - -// ************************************************************************************************* -// Radiance RGBE HDR loader -// originally by Nicolas Schulz -#ifndef STBI_NO_HDR -static int stbi__hdr_test_core(stbi__context* s, const char* signature) -{ - int i; - for (i = 0; signature[i]; ++i) - if (stbi__get8(s) != signature[i]) - return 0; - stbi__rewind(s); - return 1; -} - -static int stbi__hdr_test(stbi__context* s) -{ - int r = stbi__hdr_test_core(s, "#?RADIANCE\n"); - stbi__rewind(s); - if (!r) { - r = stbi__hdr_test_core(s, "#?RGBE\n"); - stbi__rewind(s); - } - return r; -} - -#define STBI__HDR_BUFLEN 1024 -static char* stbi__hdr_gettoken(stbi__context * z, char* buffer) -{ - int len = 0; - char c = '\0'; - - c = (char)stbi__get8(z); - - while (!stbi__at_eof(z) && c != '\n') { - buffer[len++] = c; - if (len == STBI__HDR_BUFLEN - 1) { - // flush to end of line - while (!stbi__at_eof(z) && stbi__get8(z) != '\n') - ; - break; - } - c = (char)stbi__get8(z); - } - - buffer[len] = 0; - return buffer; -} - -static void stbi__hdr_convert(float* output, stbi_uc* input, int req_comp) -{ - if (input[3] != 0) { - float f1; - // Exponent - f1 = (float)ldexp(1.0f, input[3] - (int)(128 + 8)); - if (req_comp <= 2) - output[0] = (input[0] + input[1] + input[2]) * f1 / 3; - else { - output[0] = input[0] * f1; - output[1] = input[1] * f1; - output[2] = input[2] * f1; - } - if (req_comp == 2) output[1] = 1; - if (req_comp == 4) output[3] = 1; - } - else { - switch (req_comp) { - case 4: output[3] = 1; /* fallthrough */ - case 3: output[0] = output[1] = output[2] = 0; - break; - case 2: output[1] = 1; /* fallthrough */ - case 1: output[0] = 0; - break; - } - } -} - -static float* stbi__hdr_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - char buffer[STBI__HDR_BUFLEN]; - char* token; - int valid = 0; - int width, height; - stbi_uc* scanline; - float* hdr_data; - int len; - unsigned char count, value; - int i, j, k, c1, c2, z; - const char* headerToken; - STBI_NOTUSED(ri); - - // Check identifier - headerToken = stbi__hdr_gettoken(s, buffer); - if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0) - return stbi__errpf("not HDR", "Corrupt HDR image"); - - // Parse header - for (;;) { - token = stbi__hdr_gettoken(s, buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) return stbi__errpf("unsupported format", "Unsupported HDR format"); - - // Parse width and height - // can't use sscanf() if we're not using stdio! - token = stbi__hdr_gettoken(s, buffer); - if (strncmp(token, "-Y ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - height = (int)strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) return stbi__errpf("unsupported data layout", "Unsupported HDR format"); - token += 3; - width = (int)strtol(token, NULL, 10); - - *x = width; - *y = height; - - if (comp)* comp = 3; - if (req_comp == 0) req_comp = 3; - - if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0)) - return stbi__errpf("too large", "HDR image is too large"); - - // Read data - hdr_data = (float*)stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0); - if (!hdr_data) - return stbi__errpf("outofmem", "Out of memory"); - - // Load image data - // image data is stored as some number of sca - if (width < 8 || width >= 32768) { - // Read flat data - for (j = 0; j < height; ++j) { - for (i = 0; i < width; ++i) { - stbi_uc rgbe[4]; - main_decode_loop: - stbi__getn(s, rgbe, 4); - stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp); - } - } - } - else { - // Read RLE-encoded data - scanline = NULL; - - for (j = 0; j < height; ++j) { - c1 = stbi__get8(s); - c2 = stbi__get8(s); - len = stbi__get8(s); - if (c1 != 2 || c2 != 2 || (len & 0x80)) { - // not run-length encoded, so we have to actually use THIS data as a decoded - // pixel (note this can't be a valid pixel--one of RGB must be >= 128) - stbi_uc rgbe[4]; - rgbe[0] = (stbi_uc)c1; - rgbe[1] = (stbi_uc)c2; - rgbe[2] = (stbi_uc)len; - rgbe[3] = (stbi_uc)stbi__get8(s); - stbi__hdr_convert(hdr_data, rgbe, req_comp); - i = 1; - j = 0; - STBI_FREE(scanline); - goto main_decode_loop; // yes, this makes no sense - } - len <<= 8; - len |= stbi__get8(s); - if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); } - if (scanline == NULL) { - scanline = (stbi_uc*)stbi__malloc_mad2(width, 4, 0); - if (!scanline) { - STBI_FREE(hdr_data); - return stbi__errpf("outofmem", "Out of memory"); - } - } - - for (k = 0; k < 4; ++k) { - int nleft; - i = 0; - while ((nleft = width - i) > 0) { - count = stbi__get8(s); - if (count > 128) { - // Run - value = stbi__get8(s); - count -= 128; - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = value; - } - else { - // Dump - if (count > nleft) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); } - for (z = 0; z < count; ++z) - scanline[i++ * 4 + k] = stbi__get8(s); - } - } - } - for (i = 0; i < width; ++i) - stbi__hdr_convert(hdr_data + (j * width + i) * req_comp, scanline + i * 4, req_comp); - } - if (scanline) - STBI_FREE(scanline); - } - - return hdr_data; -} - -static int stbi__hdr_info(stbi__context* s, int* x, int* y, int* comp) -{ - char buffer[STBI__HDR_BUFLEN]; - char* token; - int valid = 0; - int dummy; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (stbi__hdr_test(s) == 0) { - stbi__rewind(s); - return 0; - } - - for (;;) { - token = stbi__hdr_gettoken(s, buffer); - if (token[0] == 0) break; - if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1; - } - - if (!valid) { - stbi__rewind(s); - return 0; - } - token = stbi__hdr_gettoken(s, buffer); - if (strncmp(token, "-Y ", 3)) { - stbi__rewind(s); - return 0; - } - token += 3; - *y = (int)strtol(token, &token, 10); - while (*token == ' ') ++token; - if (strncmp(token, "+X ", 3)) { - stbi__rewind(s); - return 0; - } - token += 3; - *x = (int)strtol(token, NULL, 10); - *comp = 3; - return 1; -} -#endif // STBI_NO_HDR - -#ifndef STBI_NO_BMP -static int stbi__bmp_info(stbi__context* s, int* x, int* y, int* comp) -{ - void* p; - stbi__bmp_data info; - - info.all_a = 255; - p = stbi__bmp_parse_header(s, &info); - stbi__rewind(s); - if (p == NULL) - return 0; - if (x)* x = s->img_x; - if (y)* y = s->img_y; - if (comp)* comp = info.ma ? 4 : 3; - return 1; -} -#endif - -#ifndef STBI_NO_PSD -static int stbi__psd_info(stbi__context* s, int* x, int* y, int* comp) -{ - int channelCount, dummy, depth; - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind(s); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind(s); - return 0; - } - *y = stbi__get32be(s); - *x = stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 8 && depth != 16) { - stbi__rewind(s); - return 0; - } - if (stbi__get16be(s) != 3) { - stbi__rewind(s); - return 0; - } - *comp = 4; - return 1; -} - -static int stbi__psd_is16(stbi__context* s) -{ - int channelCount, depth; - if (stbi__get32be(s) != 0x38425053) { - stbi__rewind(s); - return 0; - } - if (stbi__get16be(s) != 1) { - stbi__rewind(s); - return 0; - } - stbi__skip(s, 6); - channelCount = stbi__get16be(s); - if (channelCount < 0 || channelCount > 16) { - stbi__rewind(s); - return 0; - } - (void)stbi__get32be(s); - (void)stbi__get32be(s); - depth = stbi__get16be(s); - if (depth != 16) { - stbi__rewind(s); - return 0; - } - return 1; -} -#endif - -#ifndef STBI_NO_PIC -static int stbi__pic_info(stbi__context* s, int* x, int* y, int* comp) -{ - int act_comp = 0, num_packets = 0, chained, dummy; - stbi__pic_packet packets[10]; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - if (!stbi__pic_is4(s, "\x53\x80\xF6\x34")) { - stbi__rewind(s); - return 0; - } - - stbi__skip(s, 88); - - *x = stbi__get16be(s); - *y = stbi__get16be(s); - if (stbi__at_eof(s)) { - stbi__rewind(s); - return 0; - } - if ((*x) != 0 && (1 << 28) / (*x) < (*y)) { - stbi__rewind(s); - return 0; - } - - stbi__skip(s, 8); - - do { - stbi__pic_packet* packet; - - if (num_packets == sizeof(packets) / sizeof(packets[0])) - return 0; - - packet = &packets[num_packets++]; - chained = stbi__get8(s); - packet->size = stbi__get8(s); - packet->type = stbi__get8(s); - packet->channel = stbi__get8(s); - act_comp |= packet->channel; - - if (stbi__at_eof(s)) { - stbi__rewind(s); - return 0; - } - if (packet->size != 8) { - stbi__rewind(s); - return 0; - } - } while (chained); - - *comp = (act_comp & 0x10 ? 4 : 3); - - return 1; -} -#endif - -// ************************************************************************************************* -// Portable Gray Map and Portable Pixel Map loader -// by Ken Miller -// -// PGM: http://netpbm.sourceforge.net/doc/pgm.html -// PPM: http://netpbm.sourceforge.net/doc/ppm.html -// -// Known limitations: -// Does not support comments in the header section -// Does not support ASCII image data (formats P2 and P3) -// Does not support 16-bit-per-channel - -#ifndef STBI_NO_PNM - -static int stbi__pnm_test(stbi__context* s) -{ - char p, t; - p = (char)stbi__get8(s); - t = (char)stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind(s); - return 0; - } - return 1; -} - -static void* stbi__pnm_load(stbi__context* s, int* x, int* y, int* comp, int req_comp, stbi__result_info* ri) -{ - stbi_uc* out; - STBI_NOTUSED(ri); - - if (!stbi__pnm_info(s, (int*)& s->img_x, (int*)& s->img_y, (int*)& s->img_n)) - return 0; - - *x = s->img_x; - *y = s->img_y; - if (comp)* comp = s->img_n; - - if (!stbi__mad3sizes_valid(s->img_n, s->img_x, s->img_y, 0)) - return stbi__errpuc("too large", "PNM too large"); - - out = (stbi_uc*)stbi__malloc_mad3(s->img_n, s->img_x, s->img_y, 0); - if (!out) return stbi__errpuc("outofmem", "Out of memory"); - stbi__getn(s, out, s->img_n * s->img_x * s->img_y); - - if (req_comp && req_comp != s->img_n) { - out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y); - if (out == NULL) return out; // stbi__convert_format frees input on failure - } - return out; -} - -static int stbi__pnm_isspace(char c) -{ - return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r'; -} - -static void stbi__pnm_skip_whitespace(stbi__context* s, char* c) -{ - for (;;) { - while (!stbi__at_eof(s) && stbi__pnm_isspace(*c)) - * c = (char)stbi__get8(s); - - if (stbi__at_eof(s) || *c != '#') - break; - - while (!stbi__at_eof(s) && *c != '\n' && *c != '\r') - * c = (char)stbi__get8(s); - } -} - -static int stbi__pnm_isdigit(char c) -{ - return c >= '0' && c <= '9'; -} - -static int stbi__pnm_getinteger(stbi__context* s, char* c) -{ - int value = 0; - - while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) { - value = value * 10 + (*c - '0'); - *c = (char)stbi__get8(s); - } - - return value; -} - -static int stbi__pnm_info(stbi__context* s, int* x, int* y, int* comp) -{ - int maxv, dummy; - char c, p, t; - - if (!x) x = &dummy; - if (!y) y = &dummy; - if (!comp) comp = &dummy; - - stbi__rewind(s); - - // Get identifier - p = (char)stbi__get8(s); - t = (char)stbi__get8(s); - if (p != 'P' || (t != '5' && t != '6')) { - stbi__rewind(s); - return 0; - } - - *comp = (t == '6') ? 3 : 1; // '5' is 1-component .pgm; '6' is 3-component .ppm - - c = (char)stbi__get8(s); - stbi__pnm_skip_whitespace(s, &c); - - *x = stbi__pnm_getinteger(s, &c); // read width - stbi__pnm_skip_whitespace(s, &c); - - *y = stbi__pnm_getinteger(s, &c); // read height - stbi__pnm_skip_whitespace(s, &c); - - maxv = stbi__pnm_getinteger(s, &c); // read max value - - if (maxv > 255) - return stbi__err("max value > 255", "PPM image not 8-bit"); - else - return 1; -} -#endif - -static int stbi__info_main(stbi__context* s, int* x, int* y, int* comp) -{ -#ifndef STBI_NO_JPEG - if (stbi__jpeg_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PNG - if (stbi__png_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_GIF - if (stbi__gif_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_BMP - if (stbi__bmp_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PSD - if (stbi__psd_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PIC - if (stbi__pic_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_PNM - if (stbi__pnm_info(s, x, y, comp)) return 1; -#endif - -#ifndef STBI_NO_HDR - if (stbi__hdr_info(s, x, y, comp)) return 1; -#endif - - // test tga last because it's a crappy test! -#ifndef STBI_NO_TGA - if (stbi__tga_info(s, x, y, comp)) - return 1; -#endif - return stbi__err("unknown image type", "Image not of any known type, or corrupt"); -} - -static int stbi__is_16_main(stbi__context* s) -{ -#ifndef STBI_NO_PNG - if (stbi__png_is16(s)) return 1; -#endif - -#ifndef STBI_NO_PSD - if (stbi__psd_is16(s)) return 1; -#endif - - return 0; -} - -#ifndef STBI_NO_STDIO -STBIDEF int stbi_info(char const* filename, int* x, int* y, int* comp) -{ - FILE* f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_info_from_file(f, x, y, comp); - fclose(f); - return result; -} - -STBIDEF int stbi_info_from_file(FILE* f, int* x, int* y, int* comp) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__info_main(&s, x, y, comp); - fseek(f, pos, SEEK_SET); - return r; -} - -STBIDEF int stbi_is_16_bit(char const* filename) -{ - FILE* f = stbi__fopen(filename, "rb"); - int result; - if (!f) return stbi__err("can't fopen", "Unable to open file"); - result = stbi_is_16_bit_from_file(f); - fclose(f); - return result; -} - -STBIDEF int stbi_is_16_bit_from_file(FILE* f) -{ - int r; - stbi__context s; - long pos = ftell(f); - stbi__start_file(&s, f); - r = stbi__is_16_main(&s); - fseek(f, pos, SEEK_SET); - return r; -} -#endif // !STBI_NO_STDIO - -STBIDEF int stbi_info_from_memory(stbi_uc const* buffer, int len, int* x, int* y, int* comp) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__info_main(&s, x, y, comp); -} - -STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const* c, void* user, int* x, int* y, int* comp) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user); - return stbi__info_main(&s, x, y, comp); -} - -STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const* buffer, int len) -{ - stbi__context s; - stbi__start_mem(&s, buffer, len); - return stbi__is_16_main(&s); -} - -STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const* c, void* user) -{ - stbi__context s; - stbi__start_callbacks(&s, (stbi_io_callbacks*)c, user); - return stbi__is_16_main(&s); -} - -#endif // STB_IMAGE_IMPLEMENTATION - -/* - revision history: - 2.19 (2018-02-11) fix warning - 2.18 (2018-01-30) fix warnings - 2.17 (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug - 1-bit BMP - *_is_16_bit api - avoid warnings - 2.16 (2017-07-23) all functions have 16-bit variants; - STBI_NO_STDIO works again; - compilation fixes; - fix rounding in unpremultiply; - optimize vertical flip; - disable raw_len validation; - documentation fixes - 2.15 (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode; - warning fixes; disable run-time SSE detection on gcc; - uniform handling of optional "return" values; - thread-safe initialization of zlib tables - 2.14 (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs - 2.13 (2016-11-29) add 16-bit API, only supported for PNG right now - 2.12 (2016-04-02) fix typo in 2.11 PSD fix that caused crashes - 2.11 (2016-04-02) allocate large structures on the stack - remove white matting for transparent PSD - fix reported channel count for PNG & BMP - re-enable SSE2 in non-gcc 64-bit - support RGB-formatted JPEG - read 16-bit PNGs (only as 8-bit) - 2.10 (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED - 2.09 (2016-01-16) allow comments in PNM files - 16-bit-per-pixel TGA (not bit-per-component) - info() for TGA could break due to .hdr handling - info() for BMP to shares code instead of sloppy parse - can use STBI_REALLOC_SIZED if allocator doesn't support realloc - code cleanup - 2.08 (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA - 2.07 (2015-09-13) fix compiler warnings - partial animated GIF support - limited 16-bpc PSD support - #ifdef unused functions - bug with < 92 byte PIC,PNM,HDR,TGA - 2.06 (2015-04-19) fix bug where PSD returns wrong '*comp' value - 2.05 (2015-04-19) fix bug in progressive JPEG handling, fix warning - 2.04 (2015-04-15) try to re-enable SIMD on MinGW 64-bit - 2.03 (2015-04-12) extra corruption checking (mmozeiko) - stbi_set_flip_vertically_on_load (nguillemot) - fix NEON support; fix mingw support - 2.02 (2015-01-19) fix incorrect assert, fix warning - 2.01 (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2 - 2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG - 2.00 (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg) - progressive JPEG (stb) - PGM/PPM support (Ken Miller) - STBI_MALLOC,STBI_REALLOC,STBI_FREE - GIF bugfix -- seemingly never worked - STBI_NO_*, STBI_ONLY_* - 1.48 (2014-12-14) fix incorrectly-named assert() - 1.47 (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb) - optimize PNG (ryg) - fix bug in interlaced PNG with user-specified channel count (stb) - 1.46 (2014-08-26) - fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG - 1.45 (2014-08-16) - fix MSVC-ARM internal compiler error by wrapping malloc - 1.44 (2014-08-07) - various warning fixes from Ronny Chevalier - 1.43 (2014-07-15) - fix MSVC-only compiler problem in code changed in 1.42 - 1.42 (2014-07-09) - don't define _CRT_SECURE_NO_WARNINGS (affects user code) - fixes to stbi__cleanup_jpeg path - added STBI_ASSERT to avoid requiring assert.h - 1.41 (2014-06-25) - fix search&replace from 1.36 that messed up comments/error messages - 1.40 (2014-06-22) - fix gcc struct-initialization warning - 1.39 (2014-06-15) - fix to TGA optimization when req_comp != number of components in TGA; - fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite) - add support for BMP version 5 (more ignored fields) - 1.38 (2014-06-06) - suppress MSVC warnings on integer casts truncating values - fix accidental rename of 'skip' field of I/O - 1.37 (2014-06-04) - remove duplicate typedef - 1.36 (2014-06-03) - convert to header file single-file library - if de-iphone isn't set, load iphone images color-swapped instead of returning NULL - 1.35 (2014-05-27) - various warnings - fix broken STBI_SIMD path - fix bug where stbi_load_from_file no longer left file pointer in correct place - fix broken non-easy path for 32-bit BMP (possibly never used) - TGA optimization by Arseny Kapoulkine - 1.34 (unknown) - use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case - 1.33 (2011-07-14) - make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements - 1.32 (2011-07-13) - support for "info" function for all supported filetypes (SpartanJ) - 1.31 (2011-06-20) - a few more leak fixes, bug in PNG handling (SpartanJ) - 1.30 (2011-06-11) - added ability to load files via callbacks to accomidate custom input streams (Ben Wenger) - removed deprecated format-specific test/load functions - removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway - error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha) - fix inefficiency in decoding 32-bit BMP (David Woo) - 1.29 (2010-08-16) - various warning fixes from Aurelien Pocheville - 1.28 (2010-08-01) - fix bug in GIF palette transparency (SpartanJ) - 1.27 (2010-08-01) - cast-to-stbi_uc to fix warnings - 1.26 (2010-07-24) - fix bug in file buffering for PNG reported by SpartanJ - 1.25 (2010-07-17) - refix trans_data warning (Won Chun) - 1.24 (2010-07-12) - perf improvements reading from files on platforms with lock-heavy fgetc() - minor perf improvements for jpeg - deprecated type-specific functions so we'll get feedback if they're needed - attempt to fix trans_data warning (Won Chun) - 1.23 fixed bug in iPhone support - 1.22 (2010-07-10) - removed image *writing* support - stbi_info support from Jetro Lauha - GIF support from Jean-Marc Lienher - iPhone PNG-extensions from James Brown - warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva) - 1.21 fix use of 'stbi_uc' in header (reported by jon blow) - 1.20 added support for Softimage PIC, by Tom Seddon - 1.19 bug in interlaced PNG corruption check (found by ryg) - 1.18 (2008-08-02) - fix a threading bug (local mutable static) - 1.17 support interlaced PNG - 1.16 major bugfix - stbi__convert_format converted one too many pixels - 1.15 initialize some fields for thread safety - 1.14 fix threadsafe conversion bug - header-file-only version (#define STBI_HEADER_FILE_ONLY before including) - 1.13 threadsafe - 1.12 const qualifiers in the API - 1.11 Support installable IDCT, colorspace conversion routines - 1.10 Fixes for 64-bit (don't use "unsigned long") - optimized upsampling by Fabian "ryg" Giesen - 1.09 Fix format-conversion for PSD code (bad global variables!) - 1.08 Thatcher Ulrich's PSD code integrated by Nicolas Schulz - 1.07 attempt to fix C++ warning/errors again - 1.06 attempt to fix C++ warning/errors again - 1.05 fix TGA loading to return correct *comp and use good luminance calc - 1.04 default float alpha is 1, not 255; use 'void *' for stbi_image_free - 1.03 bugfixes to STBI_NO_STDIO, STBI_NO_HDR - 1.02 support for (subset of) HDR files, float interface for preferred access to them - 1.01 fix bug: possible bug in handling right-side up bmps... not sure - fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all - 1.00 interface to zlib that skips zlib header - 0.99 correct handling of alpha in palette - 0.98 TGA loader by lonesock; dynamically add loaders (untested) - 0.97 jpeg errors on too large a file; also catch another malloc failure - 0.96 fix detection of invalid v value - particleman@mollyrocket forum - 0.95 during header scan, seek to markers in case of padding - 0.94 STBI_NO_STDIO to disable stdio usage; rename all #defines the same - 0.93 handle jpegtran output; verbose errors - 0.92 read 4,8,16,24,32-bit BMP files of several formats - 0.91 output 24-bit Windows 3.0 BMP files - 0.90 fix a few more warnings; bump version number to approach 1.0 - 0.61 bugfixes due to Marc LeBlanc, Christopher Lloyd - 0.60 fix compiling as c++ - 0.59 fix warnings: merge Dave Moore's -Wall fixes - 0.58 fix bug: zlib uncompressed mode len/nlen was wrong endian - 0.57 fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available - 0.56 fix bug: zlib uncompressed mode len vs. nlen - 0.55 fix bug: restart_interval not initialized to 0 - 0.54 allow NULL for 'int *comp' - 0.53 fix bug in png 3->4; speedup png decoding - 0.52 png handles req_comp=3,4 directly; minor cleanup; jpeg comments - 0.51 obey req_comp requests, 1-component jpegs return as 1-component, - on 'test' only check type, not whether we support this variant - 0.50 (2006-11-19) - first released version -*/ - - -/* ------------------------------------------------------------------------------- -This software is available under 2 licenses -- choose whichever you prefer. ------------------------------------------------------------------------------- -ALTERNATIVE A - MIT License -Copyright (c) 2017 Sean Barrett -Permission is hereby granted, free of charge, to any person obtaining a copy of -this software and associated documentation files (the "Software"), to deal in -the Software without restriction, including without limitation the rights to -use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies -of the Software, and to permit persons to whom the Software is furnished to do -so, subject to the following conditions: -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. ------------------------------------------------------------------------------- -ALTERNATIVE B - Public Domain (www.unlicense.org) -This is free and unencumbered software released into the public domain. -Anyone is free to copy, modify, publish, use, compile, sell, or distribute this -software, either in source code form or as a compiled binary, for any purpose, -commercial or non-commercial, and by any means. -In jurisdictions that recognize copyright laws, the author or authors of this -software dedicate any and all copyright interest in the software to the public -domain. We make this dedication for the benefit of the public at large and to -the detriment of our heirs and successors. We intend this dedication to be an -overt act of relinquishment in perpetuity of all present and future rights to -this software under copyright law. -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN -ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION -WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ------------------------------------------------------------------------------- -*/ diff --git a/src/world/block.cpp b/src/world/block.cpp deleted file mode 100644 index 39b400d..0000000 --- a/src/world/block.cpp +++ /dev/null @@ -1,52 +0,0 @@ -#include "block.hpp" - -#include "../config.hpp" - -#include - -std::shared_ptr CBlockDictionary::Instance; - -std::shared_ptr CBlockDictionary::GetInstance() { - - if (!CBlockDictionary::Instance) { - - CBlockDictionary::Instance = std::make_shared(); - - } - - return CBlockDictionary::Instance; - -} - - -void CBlockDictionary::Build() { - - // Order matters ! - RegisterTexture("stone.png"); - RegisterTexture("dirt.png"); - RegisterTexture("grass_side.png"); - RegisterTexture("grass_top.png"); - RegisterTexture("cobblestone.png"); - RegisterTexture("bedrock.png"); - - // Texture winding order - top, bottom, left, right, front, back - RegisterBlock(EBlockType::Air, { }); - RegisterBlock(EBlockType::Stone, { EFaceTexture::Stone, EFaceTexture::Stone, EFaceTexture::Stone, EFaceTexture::Stone, EFaceTexture::Stone, EFaceTexture::Stone }); - RegisterBlock(EBlockType::Dirt, { EFaceTexture::Dirt, EFaceTexture::Dirt, EFaceTexture::Dirt, EFaceTexture::Dirt, EFaceTexture::Dirt, EFaceTexture::Dirt }); - RegisterBlock(EBlockType::Grass, { EFaceTexture::Grass, EFaceTexture::Dirt, EFaceTexture::GrassSide, EFaceTexture::GrassSide, EFaceTexture::GrassSide, EFaceTexture::GrassSide }); - RegisterBlock(EBlockType::Cobblestone, { EFaceTexture::Cobblestone, EFaceTexture::Cobblestone, EFaceTexture::Cobblestone, EFaceTexture::Cobblestone, EFaceTexture::Cobblestone, EFaceTexture::Cobblestone }); - RegisterBlock(EBlockType::Bedrock, { EFaceTexture::Bedrock, EFaceTexture::Bedrock, EFaceTexture::Bedrock, EFaceTexture::Bedrock, EFaceTexture::Bedrock, EFaceTexture::Bedrock }); - -} - -void CBlockDictionary::RegisterTexture(std::string texture) { - - Textures.push_back(texture); - -} - -void CBlockDictionary::RegisterBlock(EBlockType::Block block, std::vector faceTextures) { - - BlockEntries[block] = std::make_shared((uint8_t)block, faceTextures); - -} diff --git a/src/world/block.hpp b/src/world/block.hpp deleted file mode 100644 index ea7686e..0000000 --- a/src/world/block.hpp +++ /dev/null @@ -1,86 +0,0 @@ -#ifndef MINECRAFT_WORLD_BLOCK_H_ -#define MINECRAFT_WORLD_BLOCK_H_ - -#include "../common.hpp" - - -namespace EBlockType { - - enum Block : uint8_t { - - Air = 0, - Stone, - Grass, - Dirt, - Cobblestone, - Bedrock - - }; - -} - -namespace EFaceTexture { - - enum Texture : uint16_t { - - Stone, - Dirt, - GrassSide, - Grass, - Cobblestone, - Bedrock - - }; - -} - -// Texture winding order - top, bottom, left, right, front, back -class CBlockEntry { -public: - - CBlockEntry(uint8_t id, std::vector faceTextures) - : ID(id), FaceTextures(faceTextures) { } - - uint8_t ID; - std::vector FaceTextures; - -}; - -// TODO: Make design of the class data oriented -// ie, import all the data used in the build from -// files and that -class CBlockDictionary { -public: - - static std::shared_ptr GetInstance(); - - static std::shared_ptr Instance; - -public: - - void Build(); - - // The index of the texutres path in this array is equal to - // that textures ID, to be referenced in the block entry - std::vector Textures; - - // Only supports up to 255 blocs, 0 being air - // word stores vectors of chunks which are 16x16x256 - // vectors of uint8_t which reference the block dictionary - std::map> BlockEntries; - - // Expects textures to be inserted in order, 0-... - void RegisterTexture(std::string texture); - - void RegisterBlock(EBlockType::Block block, std::vector faceTextures); - -}; - - -// static std::vector> TextureIdsAndPaths { -// {0, "dirt.png"}, -// {1, "grass_side.png"}, -// {2, "grass_top.png"} -// }; - -#endif diff --git a/src/world/chunk/chunk.cpp b/src/world/chunk/chunk.cpp deleted file mode 100644 index d46c902..0000000 --- a/src/world/chunk/chunk.cpp +++ /dev/null @@ -1,295 +0,0 @@ -#include "chunk.hpp" -#include "voxel.hpp" - -#include "../../renderer/shader.hpp" -#include "../../renderer/camera.hpp" - -#include "../block.hpp" - -#include "../../util/fastnoise.hpp" - -#include - -static std::default_random_engine generator; - -Chunk::Chunk() { - -} - -Chunk::Chunk(int x, int z) { - - X = x, Z = z; - - Load(); - -} - -Chunk::Chunk(int x, int z, std::vector voxels) { - - X = x, Z = z; - - Voxels = voxels; - - Load(); - -} - -Chunk::Chunk(int x, int z, std::shared_ptr terrainGenerator) { - - X = x, Z = z; - int y; - - for (x = 0; x < CHUNK_WIDTH; x++) - for (y = 0; y < CHUNK_HEIGHT; y++) - for (z = 0; z < CHUNK_DEPTH; z++) { - - if (y == 0) { - Voxels.push_back((uint8_t)EBlockType::Bedrock); - continue; - } - - if (y == 1 && (float)rand() / (float)RAND_MAX > 0.5f) { - Voxels.push_back((uint8_t)EBlockType::Bedrock); - continue; - } - - if (pow((y / (float)CHUNK_HEIGHT), 1.1024f) + terrainGenerator->GetNoise(x + (Z * CHUNK_WIDTH), y, z + (X * CHUNK_DEPTH)) * 0.40f < 0.5f) { - - Voxels.push_back((uint8_t)EBlockType::Grass); - continue; - - } - - Voxels.push_back((uint8_t)EBlockType::Air); - - } - - for (x = 0; x < CHUNK_WIDTH; x++) - for (y = 0; y < CHUNK_HEIGHT; y++) - for (z = 0; z < CHUNK_DEPTH; z++) { - - if (BlockAt(x, y, z) == EBlockType::Bedrock) - continue; - - // No need for bounds checking as a closed loop - if (BlockAt(x, y + 1, z) == EBlockType::Grass) - Voxels[x + CHUNK_WIDTH * (y + CHUNK_HEIGHT * z)] = EBlockType::Dirt; - - } - - // Add stone 3 layers below dirt - for (x = 0; x < CHUNK_WIDTH; x++) - for (y = 0; y < CHUNK_HEIGHT; y++) - for (z = 0; z < CHUNK_DEPTH; z++) { - - if (BlockAt(x, y, z) == EBlockType::Bedrock) - continue; - - if (BlockAt(x, y + 1, z) == EBlockType::Dirt) - if (BlockAt(x, y + 2, z) == EBlockType::Dirt) - // if (BlockAt(x, y + 3, z) == EBlockType::Dirt) - Voxels[x + CHUNK_WIDTH * (y + CHUNK_HEIGHT * z)] = EBlockType::Stone; - - } - - // Add the rest of the stone - for (x = 0; x < CHUNK_WIDTH; x++) - for (y = 0; y < CHUNK_HEIGHT; y++) - for (z = 0; z < CHUNK_DEPTH; z++) { - - if (BlockAt(x, y, z) == EBlockType::Bedrock) - continue; - - if (BlockAt(x, y + 1, z) == EBlockType::Stone) - Voxels[x + CHUNK_WIDTH * (y + CHUNK_HEIGHT * z)] = EBlockType::Stone; - - } - - Load(); - -} - -void Chunk::Load() { - - if (Loaded) - return; - - m_model = glm::translate(glm::mat4(1.0f), { X * CHUNK_WIDTH, 0, Z * CHUNK_DEPTH }); - - if (!Voxels.empty()) { - m_mesh(); - Loaded = true; - return; - } - - // Generate a superflat chunk if nothing is there - // [x + WIDTH * (y + HEIGHT * z)] - for (int x = 0; x < CHUNK_WIDTH; x++) - for (int y = 0; y < CHUNK_HEIGHT; y++) - for (int z = 0; z < CHUNK_DEPTH; z++) { - - if (y > 32) { - Voxels.push_back((uint8_t)EBlockType::Air); - continue; - } - - if (y == 0) - Voxels.push_back((uint8_t)EBlockType::Bedrock); - else if (y < 28) - Voxels.push_back((uint8_t)EBlockType::Stone); - else if (y < 32) - Voxels.push_back((uint8_t)EBlockType::Dirt); - else - Voxels.push_back((uint8_t)EBlockType::Grass); - - } - - m_mesh(); - Loaded = true; - -} - -void Chunk::Unload() { - - m_vertices.clear(); - m_uvs.clear(); - - glBindVertexArray(m_vao); - - glDeleteBuffers(1, &m_vbo); - glDeleteVertexArrays(1, &m_vao); - - Loaded = false; - -} - -void Chunk::UploadMesh() { - - if (!MeshReady || !Loaded) - return; - - glGenVertexArrays(1, &m_vao); - glBindVertexArray(m_vao); - - glGenBuffers(1, &m_vbo); - glBindBuffer(GL_ARRAY_BUFFER, m_vbo); - - std::vector data; - data.insert(data.end(), m_vertices.begin(), m_vertices.end()); - data.insert(data.end(), m_uvs.begin(), m_uvs.end()); - - m_numVerts = m_vertices.size(); - - glBufferData(GL_ARRAY_BUFFER, data.size() * sizeof(glm::vec3), &data[0], GL_STATIC_DRAW); - - glEnableVertexAttribArray(0); - glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, (const void*)0); - - glEnableVertexAttribArray(1); - glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 0, (const void*)(m_vertices.size() * sizeof(glm::vec3))); - - m_vertices.clear(); - m_uvs.clear(); - - data.clear(); - - glBindVertexArray(0); - - MeshReady = !MeshReady; - -} - -void Chunk::Render(std::shared_ptr camera, std::shared_ptr shader) { - - if (!MeshReady || !Loaded) - return; - - shader->Use(); - glBindVertexArray(m_vao); - - GLint uniTrans = glGetUniformLocation(shader->Program, "model"); - glUniformMatrix4fv(uniTrans, 1, GL_FALSE, glm::value_ptr(m_model)); - - GLint uniView = glGetUniformLocation(shader->Program, "view"); - glUniformMatrix4fv(uniView, 1, GL_FALSE, glm::value_ptr(camera->GetViewMatrix())); - - GLint uniProj = glGetUniformLocation(shader->Program, "proj"); - glUniformMatrix4fv(uniProj, 1, GL_FALSE, glm::value_ptr(camera->GetProjectionMatrix())); - - glDrawArrays(GL_TRIANGLES, 0, m_numVerts); - -} - -void Chunk::Update(std::vector voxels) { - - Voxels = voxels; - m_mesh(); - -} - -uint8_t Chunk::BlockAt(int x, int y, int z) { - - if (x > CHUNK_WIDTH - 1) return 0; - if (y > CHUNK_HEIGHT - 1) return 0; - if (z > CHUNK_DEPTH - 1) return 0; - - if (x < 0) return 0; - if (y < 0) return 0; - if (z < 0) return 0; - - return Voxels[x + CHUNK_WIDTH * (y + CHUNK_HEIGHT * z)]; - -} - -void Chunk::m_mesh() { - - // TODO: Use greedy meshing for MAXIMUM performance - for (int x = 0; x < CHUNK_WIDTH; x++) - for (int y = 0; y < CHUNK_HEIGHT; y++) - for (int z = 0; z < CHUNK_DEPTH; z++) { - - std::vector tempVerts; - std::vector tempUVs; - - uint8_t block = BlockAt(x, y, z); - - if (block == EBlockType::Air) continue; - - Voxel tmp({x, y, z}, block); - - if (BlockAt(x + 1, y, z) == EBlockType::Air) - tmp.AddFace(EFaceType::Right); - - if (BlockAt(x - 1, y, z) == EBlockType::Air) - tmp.AddFace(EFaceType::Left); - - if (BlockAt(x, y + 1, z) == EBlockType::Air) - tmp.AddFace(EFaceType::Top); - - if (BlockAt(x, y - 1, z) == EBlockType::Air) - tmp.AddFace(EFaceType::Bottom); - - if (BlockAt(x, y, z + 1) == EBlockType::Air) - tmp.AddFace(EFaceType::Front); - - if (BlockAt(x, y, z - 1) == EBlockType::Air) - tmp.AddFace(EFaceType::Back); - - tmp.GetMesh(tempVerts, tempUVs); - - m_vertices.insert(m_vertices.end(), tempVerts.begin(), tempVerts.end()); - m_uvs.insert(m_uvs.end(), tempUVs.begin(), tempUVs.end()); - - tmp.Clear(); - - } - - MeshReady = true; - -} - -Chunk::~Chunk() { - - Unload(); - -} diff --git a/src/world/chunk/chunk.hpp b/src/world/chunk/chunk.hpp deleted file mode 100644 index 0422df7..0000000 --- a/src/world/chunk/chunk.hpp +++ /dev/null @@ -1,70 +0,0 @@ -#ifndef MINECRAFT_RENDERER_CHUNK_H_ -#define MINECRAFT_RENDERER_CHUNK_H_ - -#include "../../common.hpp" - -#define CHUNK_HEIGHT 128 -#define CHUNK_WIDTH 16 -#define CHUNK_DEPTH 16 - -class FastNoise; - -class Camera; -class Shader; - -class Voxel; - -class Chunk { -public: - - Chunk(); - Chunk(int x, int z); - Chunk(int x, int z, std::vector voxels); - Chunk(int x, int z, std::shared_ptr terrainGenerator); - - void Load(); - void Unload(); - - void UploadMesh(); - bool MeshReady = false; - - void Render(std::shared_ptr camera, std::shared_ptr shader); - - void Update(std::vector voxels); - - uint8_t BlockAt(int x, int y, int z); - - // Indexed sequentially [x + WIDTH * (y + HEIGHT * z)] = voxelID - // the voxel id is used to index the block dictionary to get properties - // to generate a mesh and send it to the GPU - std::vector Voxels; - - // To only be changed by the class its self - bool Loaded = false; - // To only be changed by render components - bool ShouldRender = false; - - // Chunk World pos - int X,Z; - - ~Chunk(); - -private: - - void m_mesh(); - - GLuint m_vao = 0; - GLuint m_vbo = 0; - - // Must be translated by a multiple of 16 in the x or z, nothing in y - glm::mat4 m_model; - - std::vector m_vertices; - int m_numVerts = 0; - - std::vector m_uvs; - - -}; - -#endif diff --git a/src/world/chunk/face.hpp b/src/world/chunk/face.hpp deleted file mode 100644 index 20dc525..0000000 --- a/src/world/chunk/face.hpp +++ /dev/null @@ -1,127 +0,0 @@ -#ifndef MINECRAFT_RENDERER_FACE_H_ -#define MINECRAFT_RENDERER_FACE_H_ - -#include "../../common.hpp" - -namespace EFaceType { - - enum Face : uint8_t { - Top, - Bottom, - Left, - Right, - Front, - Back, - }; - -} - -static std::vector CubeTopFace = { - { -0.5f, 0.5f, -0.5f }, - { 0.5f, 0.5f, -0.5f }, - { 0.5f, 0.5f, 0.5f }, - { 0.5f, 0.5f, 0.5f }, - { -0.5f, 0.5f, 0.5f }, - { -0.5f, 0.5f, -0.5f } -}; - -static std::vector CubeTopFaceUVs = { - { 0.0f, 0.0f }, - { 1.0f, 0.0f }, - { 1.0f, 1.0f }, - { 1.0f, 1.0f }, - { 0.0f, 1.0f }, - { 0.0f, 0.0f } -}; - -static std::vector CubeBottomFace = { - { -0.5f, -0.5f, -0.5f }, - { 0.5f, -0.5f, -0.5f }, - { 0.5f, -0.5f, 0.5f }, - { 0.5f, -0.5f, 0.5f }, - { -0.5f, -0.5f, 0.5f }, - { -0.5f, -0.5f, -0.5f } -}; - -static std::vector CubeBottomFaceUVs = { - { 0.0f, 0.0f }, - { 1.0f, 0.0f }, - { 1.0f, 1.0f }, - { 1.0f, 1.0f }, - { 0.0f, 1.0f }, - { 0.0f, 0.0f } -}; - -static std::vector CubeLeftFace = { - { -0.5f, 0.5f, 0.5f }, - { -0.5f, 0.5f, -0.5f }, - { -0.5f, -0.5f, -0.5f }, - { -0.5f, -0.5f, -0.5f }, - { -0.5f, -0.5f, 0.5f }, - { -0.5f, 0.5f, 0.5f } -}; - -static std::vector CubeLeftFaceUVs = { - { 0.0f, 0.0f }, - { 1.0f, 0.0f }, - { 1.0f, 1.0f }, - { 1.0f, 1.0f }, - { 0.0f, 1.0f }, - { 0.0f, 0.0f } -}; - -static std::vector CubeRightFace = { - { 0.5f, 0.5f, 0.5f }, - { 0.5f, 0.5f, -0.5f }, - { 0.5f, -0.5f, -0.5f }, - { 0.5f, -0.5f, -0.5f }, - { 0.5f, -0.5f, 0.5f }, - { 0.5f, 0.5f, 0.5f }, -}; - -static std::vector CubeRightFaceUVs = { - { 0.0f, 0.0f }, - { 1.0f, 0.0f }, - { 1.0f, 1.0f }, - { 1.0f, 1.0f }, - { 0.0f, 1.0f }, - { 0.0f, 0.0f } -}; - -static std::vector CubeFrontFace = { - { -0.5f, -0.5f, 0.5f }, - { 0.5f, -0.5f, 0.5f }, - { 0.5f, 0.5f, 0.5f }, - { 0.5f, 0.5f, 0.5f }, - { -0.5f, 0.5f, 0.5f }, - { -0.5f, -0.5f, 0.5f } -}; - -static std::vector CubeFrontFaceUVs = { - { 1.0f, 1.0f }, - { 0.0f, 1.0f }, - { 0.0f, 0.0f }, - { 0.0f, 0.0f }, - { 1.0f, 0.0f }, - { 1.0f, 1.0f } -}; - -static std::vector CubeBackFace = { - { -0.5f, -0.5f, -0.5f }, - { 0.5f, -0.5f, -0.5f }, - { 0.5f, 0.5f, -0.5f }, - { 0.5f, 0.5f, -0.5f }, - { -0.5f, 0.5f, -0.5f }, - { -0.5f, -0.5f, -0.5f } -}; - -static std::vector CubeBackFaceUVs = { - { 1.0f, 1.0f }, - { 0.0f, 1.0f }, - { 0.0f, 0.0f }, - { 0.0f, 0.0f }, - { 1.0f, 0.0f }, - { 1.0f, 1.0f } -}; - -#endif diff --git a/src/world/chunk/voxel.cpp b/src/world/chunk/voxel.cpp deleted file mode 100644 index b0ff73f..0000000 --- a/src/world/chunk/voxel.cpp +++ /dev/null @@ -1,132 +0,0 @@ -#include "voxel.hpp" - -#include -#include - -#include "../../renderer/shader.hpp" -#include "../../renderer/camera.hpp" - -#include "face.hpp" - -#include "../block.hpp" - -Voxel::Voxel(glm::vec3 coordsInChunk, uint8_t block) { - - // Texture winding order - top, bottom, left, right, front, back - - Block = block; - m_coordsInChunk = coordsInChunk; - -} - -void Voxel::AddFace(EFaceType::Face face) { - - std::vector verts; - std::vector uvs; - - switch (face) { - - case EFaceType::Top: - { - - verts = CubeTopFace; - uvs = CubeTopFaceUVs; - - break; - } - - case EFaceType::Bottom: - { - - verts = CubeBottomFace; - uvs = CubeBottomFaceUVs; - - break; - } - - case EFaceType::Left: - { - - verts = CubeLeftFace; - uvs = CubeLeftFaceUVs; - - break; - } - - case EFaceType::Right: - { - - verts = CubeRightFace; - uvs = CubeRightFaceUVs; - - break; - } - - case EFaceType::Front: - { - - verts = CubeFrontFace; - uvs = CubeFrontFaceUVs; - - break; - } - - case EFaceType::Back: - { - - verts = CubeBackFace; - uvs = CubeBackFaceUVs; - - break; - } - - } - - - verts = m_translateIntoChunk(verts, m_coordsInChunk); - m_vertices.insert(m_vertices.end(), verts.begin(), verts.end()); - - std::shared_ptr block = CBlockDictionary::GetInstance()->BlockEntries[Block]; - - uint16_t tex = block->FaceTextures[(uint16_t)face]; - - std::vector uvws = { - { uvs[0].x, uvs[0].y, (float)tex }, - { uvs[1].x, uvs[1].y, (float)tex }, - { uvs[2].x, uvs[2].y, (float)tex }, - { uvs[3].x, uvs[3].y, (float)tex }, - { uvs[4].x, uvs[4].y, (float)tex }, - { uvs[5].x, uvs[5].y, (float)tex }, - }; - - m_uvs.insert(m_uvs.end(), uvws.begin(), uvws.end()); - -} - -void Voxel::GetMesh(std::vector& verts, std::vector& uvs) { - - verts = m_vertices; - uvs = m_uvs; - -} - -void Voxel::Clear() { - - m_vertices.clear(); - m_uvs.clear(); - -} - -std::vector Voxel::m_translateIntoChunk(std::vector verts, glm::vec3 trans) { - - for (int i = 0; i < verts.size(); i++) { - - verts[i].x += trans.x; - verts[i].y += trans.y; - verts[i].z += trans.z; - - } - - return verts; - -} diff --git a/src/world/chunk/voxel.hpp b/src/world/chunk/voxel.hpp deleted file mode 100644 index 1e1b7b9..0000000 --- a/src/world/chunk/voxel.hpp +++ /dev/null @@ -1,33 +0,0 @@ -#ifndef MINECRAFT_RENDERER_VOXEL_H_ -#define MINECRAFT_RENDERER_VOXEL_H_ - -#include "../../common.hpp" - -#include "face.hpp" - -class Camera; -class Shader; - -class Voxel { -public: - Voxel(glm::vec3 coordsInChunk, uint8_t block); - - void AddFace(EFaceType::Face face); - void GetMesh(std::vector& verts, std::vector& uvs); - - void Clear(); - - uint8_t Block; - -private: - - glm::vec3 m_coordsInChunk; - - std::vector m_translateIntoChunk(std::vector verts, glm::vec3 trans); - - std::vector m_vertices; - std::vector m_uvs; - -}; - -#endif diff --git a/src/world/entity.cpp b/src/world/entity.cpp deleted file mode 100644 index 9e14d4f..0000000 --- a/src/world/entity.cpp +++ /dev/null @@ -1,59 +0,0 @@ -#include "entity.hpp" - -#include "../renderer/camera.hpp" - -Entity::Entity(glm::vec3 postion, glm::vec3 direction, std::shared_ptr camera) - : Position(Position) - , Direction(direction) - , EntityCamera(camera) - { - - if (EntityCamera) { - EntityCamera->UpdateView(); - } -} - -Player::Player(glm::vec3 position, glm::vec3 direction, std::shared_ptr camera) - : Entity(position, direction, camera) { - - Position = { 0, 64, 0 }; - EntityCamera->Position = { Position.x, Position.y + EyePosition, Position.z }; - EntityCamera->UpdateView(); - -} - -void Player::MoveSDL(Uint8* state) { - - EntityCamera->MoveCamera(state); - Position = EntityCamera->Position; - Position.y -= EyePosition; - -} - -void Player::HandleMouseSDL(SDL_Event e) { - - EntityCamera->HandleMouse(e); - Direction = EntityCamera->LookDirection; - -} - -void Player::UpdatePosition(glm::vec3 position) { - - Position = position; - EntityCamera->UpdatePosition({ Position.x, Position.y + EyePosition, Position.z }); - -} - - -void Player::UpdateDirection(glm::vec3 direction) { - - Direction = direction; - EntityCamera->UpdateLookDirection(direction); - -} - -void Player::CameraUpdateProjection(int xres, int yres) { - - EntityCamera->UpdateProjection(xres, yres); - -} diff --git a/src/world/entity.hpp b/src/world/entity.hpp deleted file mode 100644 index ade36b9..0000000 --- a/src/world/entity.hpp +++ /dev/null @@ -1,51 +0,0 @@ -#ifndef MINECRAFT_WORLD_ENTITY_H_ -#define MINECRAFT_WORLD_ENTITY_H_ - -#include "../common.hpp" - -class Camera; - -class Collider; - -class Entity { -public: - - Entity(glm::vec3 position, glm::vec3 direction = { 0.0f, 0.0f, 0.0f }, std::shared_ptr camera = std::make_shared()); - - // World position, 1.7 units below the - // camera position. - glm::vec3 Position; - // Look direction of the camera - glm::vec3 Direction; - // Velocity in direction - // of movement - glm::vec3 Velocity; - - // Can be null - std::shared_ptr EntityCamera; - - // Collider - // std::unique_ptr EntityCollider; - - // Mesh (or reference to) - -}; - -class Player : public Entity { -public: - - Player(glm::vec3 position, glm::vec3 direction, std::shared_ptr camera); - - float EyePosition = 1.7f; - - void MoveSDL(Uint8* state); - void HandleMouseSDL(SDL_Event e); - - void UpdatePosition(glm::vec3 position); - void UpdateDirection(glm::vec3 direction); - - void CameraUpdateProjection(int xres, int yres); - -}; - -#endif diff --git a/src/world/generator/chunkgenerator.cpp b/src/world/generator/chunkgenerator.cpp deleted file mode 100644 index 435dc81..0000000 --- a/src/world/generator/chunkgenerator.cpp +++ /dev/null @@ -1,14 +0,0 @@ -#include "../../util/fastnoise.hpp" - - -void dp() { - - FastNoise noise; - noise.SetSeed(121212); - - noise.SetNoiseType(FastNoise::SimplexFractal); - - noise.SetFractalOctaves(3); - -} - diff --git a/src/world/generator/chunkgenerator.hpp b/src/world/generator/chunkgenerator.hpp deleted file mode 100644 index 1425a26..0000000 --- a/src/world/generator/chunkgenerator.hpp +++ /dev/null @@ -1,6 +0,0 @@ -#ifndef MINECRAFT_WORLD_GENERATOR_CHUNKGENERATOR_H_ -#define MINECRAFT_WORLD_GENERATOR_CHUNKGENERATOR_H_ - - - -#endif diff --git a/src/world/generator/chunkmanager.hpp b/src/world/generator/chunkmanager.hpp deleted file mode 100644 index 8420177..0000000 --- a/src/world/generator/chunkmanager.hpp +++ /dev/null @@ -1,28 +0,0 @@ -#ifndef MINECRAFT_WORLD_GENERATOR_CUNKMANAGER_H_ -#define MINECRAFT_WORLD_GENERATOR_CUNKMANAGER_H_ - -#include "../../common.hpp" - - -class Frustrum; - -class ChunkManager { -public: - - // Instatntiated - ChunkManager(); - - void Update(); - - void Play(); - void Pause(); - - void LoadChunksAroundWorldPoint(glm::vec3 worldPoint); - - - - void CullFrustrumFromRenderQueue(); - -}; - -#endif diff --git a/src/world/world.cpp b/src/world/world.cpp deleted file mode 100644 index f7e3fbb..0000000 --- a/src/world/world.cpp +++ /dev/null @@ -1,191 +0,0 @@ -#include "world.hpp" - -#include -#include - -#include "chunk/chunk.hpp" - -#include "../renderer/shader.hpp" - -#include "../util/fastnoise.hpp" - -#include "../config.hpp" -#include "entity.hpp" - -World::World() { - -} - -void World::LoadWorld() { - - m_shaders["Basic"] = std::make_shared(); - m_shaders["Basic"]->Load(GameConfig.ResourceBase + "shaders/simple"); - m_shaders["Basic"]->Link(); - - srand(time(NULL)); - - m_noiseGenerator = std::make_shared(); - m_noiseGenerator->SetSeed(rand()); - - m_noiseGenerator->SetNoiseType(FastNoise::ValueFractal); - - m_noiseGenerator->SetFractalOctaves(5); - - // Generate a 54x54 chunk world - for (int x = -4; x < 50; x++) - for (int y = -50; y < 4; y++) { - - m_chunkLoaderQueue.push({ x, y }); - - } - - // Spawn generator threads - for (int i = 0; i < 6; i++) { - - m_generatorThreads.push_back(std::thread([&]() { - - m_loadChunks(); - - })); - - } - - m_generatorRunning = true; - -} - -void World::SetTextureMap(GLuint map) { - - m_textureMapID = map; - -} - -glm::vec3 World::GetChunkCoords(glm::vec3 worldCoords) { - - return { worldCoords.x / static_cast(CHUNK_WIDTH), - worldCoords.y / static_cast(CHUNK_HEIGHT), - worldCoords.z / static_cast(CHUNK_DEPTH) }; - -} - -glm::vec2 World::GetChunk(glm::vec3 worldCoords) { - - return { static_cast(worldCoords.x / CHUNK_WIDTH), static_cast(worldCoords.z / CHUNK_DEPTH) }; - -} - -std::vector> World::GetRenderableChunks() { - - std::vector> chunks; - - for (auto& chunk : m_chunks) { - - // Should the chunk be rendererd ? - if (chunk.second->ShouldRender) { - - m_chunkLoderMutex.lock(); - - if (chunk.second->MeshReady) - chunk.second->UploadMesh(); - - m_chunkLoderMutex.unlock(); - - // If not, add it - chunks.push_back(chunk.second); - - } - - } - - return chunks; - -} - -void World::Update(std::shared_ptr player) { - - // glm::vec2 inChunk = GetChunk(player->Position); - - // if (m_chunks.find(inChunk) == m_chunks.end()) { - - // m_chunkLoderMutex.lock(); - - // m_chunkLoaderQueue.push(inChunk); - - // m_chunkLoderMutex.unlock(); - - // } - - // std::cout << "Position: " << player->Position.x << ":" << player->Position.y << ":" << player->Position.z << std::endl; - // std::cout << "Chunk: " << inChunk.x << ":" << inChunk.y << std::endl << std::endl; - -} - -void World::Render(std::shared_ptr player) { - - glBindTexture(GL_TEXTURE_2D_ARRAY, m_textureMapID); - - std::vector> chunks = GetRenderableChunks(); - - - for (int i = 0; i < chunks.size(); i++) { - - chunks[i]->Render(player->EntityCamera, m_shaders["Basic"]); - - } - -} - -World::~World() { - - m_generatorRunning = false; - - for (int i = 0; i < m_generatorThreads.size(); i++) { - - m_generatorThreads[i].join(); - - } - - for (auto& chunk : m_chunks) { - - chunk.second->Unload(); - - } - -} - -void World::m_loadChunks() { - - while (m_generatorRunning) { - - m_chunkLoderMutex.lock(); - - glm::vec2 coords = m_chunkLoaderQueue.front(); - m_chunkLoaderQueue.pop(); - - m_chunkLoderMutex.unlock(); - - - std::shared_ptr loadingChunk = std::make_shared(coords.x, coords.y, m_noiseGenerator); - loadingChunk->ShouldRender = true; - std::cout << "Loaded chunk " << coords.x << ":" << coords.y << std::endl; - - - m_chunkLoderMutex.lock(); - - m_chunks[coords] = loadingChunk; - - m_chunkLoderMutex.unlock(); - - - while (m_chunkLoaderQueue.empty()) { - - if (!m_generatorRunning) break; - - static std::chrono::milliseconds dura(1); - std::this_thread::sleep_for(dura); - - } - - } - -} diff --git a/src/world/world.hpp b/src/world/world.hpp deleted file mode 100644 index 771dedc..0000000 --- a/src/world/world.hpp +++ /dev/null @@ -1,80 +0,0 @@ -#ifndef MINECRAFT_WORLD_WORLD_H_ -#define MINECRAFT_WORLD_WORLD_H_ - -#include "../common.hpp" - -#include "../renderer/camera.hpp" - -#include "generator/chunkmanager.hpp" -#include "chunk/chunk.hpp" - -#include -#include -#include -#include - -class FastNoise; - -class Shader; -class Entity; - -class World { -public: - - // Default constructor - World(); - - // Preps the render threads and loads all of the shaders - void LoadWorld(); - - void SetTextureMap(GLuint map); - - // Takes world coordinates and gets a chunks coordinates - glm::vec3 GetChunkCoords(glm::vec3 wordCoords); - - // Takes world coordinates and gets the chunk those coorinates - // fall in - glm::vec2 GetChunk(glm::vec3 worldCoords); - - std::vector> GetRenderableChunks(); - - void Update(std::shared_ptr player); - void Render(std::shared_ptr player); - - ~World(); - -private: - - // GL stuff - - // Main texture map id - GLuint m_textureMapID; - - // Shaders indexed by name - std::map> m_shaders; - - - // Threads used for chunk generation - std::vector m_generatorThreads; - bool m_generatorRunning = false; - - - // Chuks - // Indexed by chunk coorinates - std::unordered_map> m_chunks; - - std::mutex m_chunkUpdaterMutex; - std::queue m_chunkUpdatesQueue; - - std::mutex m_chunkLoderMutex; - std::queue m_chunkLoaderQueue; - - // Generator - std::shared_ptr m_noiseGenerator; - - - void m_loadChunks(); - -}; - -#endif