From ed5e264b0c9d2a3c357f5093aa79d665b6b3d536 Mon Sep 17 00:00:00 2001 From: Ben Kyd Date: Tue, 14 Jan 2020 16:57:08 +0000 Subject: [PATCH] BRuh --- CMakeLists.txt | 1 + LICENSE.md | 21 + resources/2d.frag | 9 + resources/2d.vert | 14 + src/frambuffer.hpp | 19 - src/framebuffer.cpp | 72 ++ src/framebuffer.hpp | 27 + src/main.cpp | 109 +- src/renderer.cpp | 90 ++ src/renderer.hpp | 33 + src/thirdparty/stb_image_write.h | 1636 ++++++++++++++++++++++++++++++ src/util/filereader.cpp | 16 + src/util/filereader.hpp | 12 + 13 files changed, 1993 insertions(+), 66 deletions(-) create mode 100644 LICENSE.md create mode 100644 resources/2d.frag create mode 100644 resources/2d.vert delete mode 100644 src/frambuffer.hpp create mode 100644 src/framebuffer.cpp create mode 100644 src/framebuffer.hpp create mode 100644 src/renderer.cpp create mode 100644 src/renderer.hpp create mode 100644 src/thirdparty/stb_image_write.h create mode 100644 src/util/filereader.cpp create mode 100644 src/util/filereader.hpp diff --git a/CMakeLists.txt b/CMakeLists.txt index 6bfa620..3e8f6ce 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -44,6 +44,7 @@ include_directories(${exe} file(GLOB src ${src}/* + ${src}/util/* ${src}/thirdparty/* ) diff --git a/LICENSE.md b/LICENSE.md new file mode 100644 index 0000000..3476190 --- /dev/null +++ b/LICENSE.md @@ -0,0 +1,21 @@ +MIT License + +Copyright (c) 2020 Benjamin Kyd + +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. diff --git a/resources/2d.frag b/resources/2d.frag new file mode 100644 index 0000000..7cba0d6 --- /dev/null +++ b/resources/2d.frag @@ -0,0 +1,9 @@ +#version 450 core + +out vec4 outColour; + +void main() { + + outColour = vec4(.9, .9, .9, 1); + +} \ No newline at end of file diff --git a/resources/2d.vert b/resources/2d.vert new file mode 100644 index 0000000..93e1513 --- /dev/null +++ b/resources/2d.vert @@ -0,0 +1,14 @@ +#version 450 core + +layout (location = 0) in vec3 position; + +uniform mat4 model; +uniform mat4 view; +uniform mat4 proj; + +void main() { + + + gl_Position = proj * view * model * vec4(position, 1.0); + +} diff --git a/src/frambuffer.hpp b/src/frambuffer.hpp deleted file mode 100644 index 2fb7ed1..0000000 --- a/src/frambuffer.hpp +++ /dev/null @@ -1,19 +0,0 @@ -#pragma once - -//#include - -class FrameBuffer -{ -public: - - FrameBuffer(); - - // Renders with OpenGL as a texture - void Render(); - - - uint32_t data; - - -}; - diff --git a/src/framebuffer.cpp b/src/framebuffer.cpp new file mode 100644 index 0000000..8edb90e --- /dev/null +++ b/src/framebuffer.cpp @@ -0,0 +1,72 @@ +#include "framebuffer.hpp" + +#include + +#define STB_IMAGE_WRITE_IMPLEMENTATION +#include "thirdparty/stb_image_write.h" + +FrameBuffer::FrameBuffer( int width, int height ) + : mWidth(width) + , mHeight(height) +{ + + size_t size = sizeof( uint32_t ) * mWidth * mHeight; + + Data = (uint32_t*)malloc( size ); + + // Initialise the framebuffer + if ( Data != nullptr ) + memset( Data, 0xFFFFFFFF, size ); +} + +void FrameBuffer::SetPixel( int x, int y, glm::vec3 p ) +{ + int i = y * mWidth + x; + const static float gamma = 1.0f / 2.2f; + uint8_t r = (uint8_t)( pow( p.r, gamma ) * 255.0f ); + uint8_t g = (uint8_t)( pow( p.g, gamma ) * 255.0f ); + uint8_t b = (uint8_t)( pow( p.b, gamma ) * 255.0f ); + uint32_t col = 0xFF000000 | r << 16 | g << 8 | b; + Data[i] = col; +} + +void FrameBuffer::Resize( int width, int height ) +{ + mWidth = width; mHeight = height; + + size_t size = sizeof( uint32_t ) * mWidth * mHeight; + + realloc( Data, size ); + memset( Data, 0xFFFFFFFF, size ); +} + +void FrameBuffer::DumpToFile( std::string file ) +{ + // int stbi_write_png(char const* filename, int w, int h, int comp, const void* data, int stride_in_bytes); + struct P { + unsigned char r, g, b, a; + }; + + P* imageData = (P*)malloc( ( (int)mWidth * (int)mHeight ) * sizeof( P ) ); + + for ( int x = 0; x < mWidth; x++ ) + for ( int y = 0; y < mHeight; y++ ) { + // Red and Blue channels need to be swapped, no clue why + // saving the framebuffer just doesnt work + uint32_t pixel = Data[y * mWidth + x]; + uint8_t er = ( pixel & 0x000000FF ); + uint8_t eg = ( pixel & 0x0000FF00 ) >> 8; + uint8_t eb = ( pixel & 0x00FF0000 ) >> 16; + uint8_t ea = ( pixel & 0xFF000000 ) >> 24; + + imageData[y * mWidth + x] = P{ (unsigned char)eb, (unsigned char)eg, (unsigned char)er, (unsigned char)ea }; + } + + stbi_write_png( file.c_str(), mWidth, mHeight, sizeof( P ), imageData, sizeof( P ) * mWidth ); + free( imageData ); +} + +FrameBuffer::~FrameBuffer() +{ + free( Data ); +} diff --git a/src/framebuffer.hpp b/src/framebuffer.hpp new file mode 100644 index 0000000..0cd5980 --- /dev/null +++ b/src/framebuffer.hpp @@ -0,0 +1,27 @@ +#pragma once + +#include +#include + +class FrameBuffer +{ +public: + + FrameBuffer( int width, int height ); + + void SetPixel( int x, int y, glm::vec3 col ); + + // Will clear the framebuffers current state + void Resize( int width, int height ); + + void DumpToFile( std::string file ); + + uint32_t* Data; + + ~FrameBuffer(); + +private: + + int mWidth, mHeight; + +}; diff --git a/src/main.cpp b/src/main.cpp index 5d2dde9..10d25c5 100644 --- a/src/main.cpp +++ b/src/main.cpp @@ -9,90 +9,105 @@ #include #endif -void doInput(SDL_Event* e, bool& isWindowOpen); +#include "renderer.hpp" +#include "framebuffer.hpp" + +void doInput( SDL_Event* e, bool& isWindowOpen ); struct Game { - int Width, Height; - SDL_Window* Window = nullptr; - SDL_GLContext GlContext = nullptr; + int Width, Height; + SDL_Window* Window = nullptr; + SDL_GLContext GlContext = nullptr; }; int main() { - SDL_Init(SDL_INIT_VIDEO); + SDL_Init( SDL_INIT_VIDEO ); - 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_CONTEXT_MAJOR_VERSION, 4); - SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 5); + 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 ); - Game game; - game.Width = 1000; game.Height = 1000; + SDL_GL_SetAttribute( SDL_GL_CONTEXT_MAJOR_VERSION, 4 ); + SDL_GL_SetAttribute( SDL_GL_CONTEXT_MINOR_VERSION, 4 ); - game.Window = SDL_CreateWindow("2D Global Illumination", - SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, - game.Width, game.Height, - SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE); + Game game; + game.Width = 700; game.Height = 700; - game.GlContext = SDL_GL_CreateContext(game.Window); + game.Window = SDL_CreateWindow( "2D Global Illumination", + SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, + game.Width, game.Height, + SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE ); - // Vsync - SDL_GL_SetSwapInterval(1); + game.GlContext = SDL_GL_CreateContext( game.Window ); - // Time to actually load OpenGL - gladLoadGLLoader(SDL_GL_GetProcAddress); + if ( !game.GlContext ) + { + std::cout << SDL_GetError() << std::endl; + exit( 0 ); + } + // Vsync + SDL_GL_SetSwapInterval( 1 ); - SDL_Event e; - const float clearColour[] = { 186.0f / 255.0f, 214.0f / 255.0f, 254.0f / 255.0f }; + // Time to actually load OpenGL + gladLoadGLLoader( SDL_GL_GetProcAddress ); - bool IsWindowOpen = true; - while (IsWindowOpen) - { + Renderer renderer; + renderer.LoadShader(); - doInput(&e, IsWindowOpen); + FrameBuffer framebuffer{ game.Width, game.Height }; + framebuffer.SetPixel( 1, 1, { 1.0, 0.0, 0.0 } ); + framebuffer.DumpToFile( "image.png" ); - //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - glClearBufferfv(GL_COLOR, 0, clearColour); + SDL_Event e; + const float clearColour[] = { 186.0f / 255.0f, 214.0f / 255.0f, 254.0f / 255.0f }; - SDL_GL_SwapWindow(game.Window); + bool IsWindowOpen = true; + while ( IsWindowOpen ) + { - } + doInput( &e, IsWindowOpen ); + + glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ); + glClearBufferfv( GL_COLOR, 0, clearColour ); + + SDL_GL_SwapWindow( game.Window ); + + } return 0; } -void doInput(SDL_Event* e, bool& isWindowOpen) +void doInput( SDL_Event* e, bool& isWindowOpen ) { - Uint8* state = (Uint8*)SDL_GetKeyboardState(NULL); + Uint8* state = (Uint8*)SDL_GetKeyboardState( NULL ); - static bool IsMouseActive = false; + static bool IsMouseActive = false; - while (SDL_PollEvent(e)) { + while ( SDL_PollEvent( e ) ) { - switch (e->type) { + switch ( e->type ) { case SDL_KEYDOWN: { - if (e->key.keysym.sym == SDLK_ESCAPE) { - + if ( e->key.keysym.sym == SDLK_ESCAPE ) { + IsMouseActive = !IsMouseActive; - if (IsMouseActive) - SDL_SetRelativeMouseMode(SDL_TRUE); + if ( IsMouseActive ) + SDL_SetRelativeMouseMode( SDL_TRUE ); else - SDL_SetRelativeMouseMode(SDL_FALSE); + SDL_SetRelativeMouseMode( SDL_FALSE ); } @@ -100,7 +115,7 @@ void doInput(SDL_Event* e, bool& isWindowOpen) } - case SDL_QUIT: + case SDL_QUIT: { isWindowOpen = false; diff --git a/src/renderer.cpp b/src/renderer.cpp new file mode 100644 index 0000000..adce74c --- /dev/null +++ b/src/renderer.cpp @@ -0,0 +1,90 @@ +#include "renderer.hpp" + +#include + +Renderer::Renderer() + : mFileReader() +{ + +} + +bool 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 ); + std::cout << "ERROR: " << buf << std::endl; + delete buf; + return false; + } + + return true; +} + + +void Renderer::LoadShader() +{ + + std::string path = std::string( RESOURCES ) + "/2d"; + + GLuint vert, frag; + + auto Load = [&]( std::string path, GLenum type ) + { + GLuint activeShader = 0; + + if ( type == GL_VERTEX_SHADER ) + vert = activeShader = glCreateShader( type ); + + if ( type == GL_FRAGMENT_SHADER ) + frag = activeShader = glCreateShader( type ); + + std::string loadedShaderSource = mFileReader.LoadTextFromFile( path ); + const char* shaderSource = loadedShaderSource.c_str(); + int shaderSourceLength = loadedShaderSource.length(); + + glShaderSource( activeShader, 1, &shaderSource, &shaderSourceLength ); + }; + + std::string vertexLocation = path + ".vert"; + Load( vertexLocation, GL_VERTEX_SHADER ); + std::cout << "Vertex shader at '" << vertexLocation << "' loaded..." << std::endl; + + + std::string fragmentLocation = path + ".frag"; + Load( fragmentLocation, GL_FRAGMENT_SHADER ); + std::cout << "Fragment shader at '" << fragmentLocation << "' loaded..." << std::endl; + + + if ( vert == 0 || frag == 0 ) { + std::cout << "Failed to link programs: Both programs not present" << std::endl; + return; + } + + glCompileShader( vert ); + if ( checkShader( vert ) ) { + std::cout << "Vertex shader '" << vert << "' compiled..." << std::endl; + } + + glCompileShader( frag ); + if ( checkShader( frag ) ) { + std::cout << "Fragment shader '" << frag << "' compiled..." << std::endl; + } + + mShaderProgram = glCreateProgram(); + + glAttachShader( mShaderProgram, vert ); + glAttachShader( mShaderProgram, frag ); + + glLinkProgram( mShaderProgram ); + + glDeleteShader( vert ); + glDeleteShader( frag ); + + glUseProgram( mShaderProgram ); + +} diff --git a/src/renderer.hpp b/src/renderer.hpp new file mode 100644 index 0000000..9064054 --- /dev/null +++ b/src/renderer.hpp @@ -0,0 +1,33 @@ +#pragma once + +#include +#include + +#include "util/filereader.hpp" + +class FrameBuffer; + +struct FrameBufferRenderable +{ + FrameBuffer* Buffer; + GLuint TextureID; + int Layer; +}; + +class Renderer +{ +public: + Renderer(); + + void LoadShader(); + + void RegisterBuffer( FrameBuffer* buffer, int layer ); + + +private: + + FileReader mFileReader; + + GLuint mShaderProgram; + +}; diff --git a/src/thirdparty/stb_image_write.h b/src/thirdparty/stb_image_write.h new file mode 100644 index 0000000..b69249e --- /dev/null +++ b/src/thirdparty/stb_image_write.h @@ -0,0 +1,1636 @@ +/* stb_image_write - v1.13 - public domain - http://nothings.org/stb + writes out PNG/BMP/TGA/JPEG/HDR images to C stdio - Sean Barrett 2010-2015 + no warranty implied; use at your own risk + + Before #including, + + #define STB_IMAGE_WRITE_IMPLEMENTATION + + in the file that you want to have the implementation. + + Will probably not work correctly with strict-aliasing optimizations. + +ABOUT: + + This header file is a library for writing images to C stdio or a callback. + + The PNG output is not optimal; it is 20-50% larger than the file + written by a decent optimizing implementation; though providing a custom + zlib compress function (see STBIW_ZLIB_COMPRESS) can mitigate that. + This library is designed for source code compactness and simplicity, + not optimal image file size or run-time performance. + +BUILDING: + + You can #define STBIW_ASSERT(x) before the #include to avoid using assert.h. + You can #define STBIW_MALLOC(), STBIW_REALLOC(), and STBIW_FREE() to replace + malloc,realloc,free. + You can #define STBIW_MEMMOVE() to replace memmove() + You can #define STBIW_ZLIB_COMPRESS to use a custom zlib-style compress function + for PNG compression (instead of the builtin one), it must have the following signature: + unsigned char * my_compress(unsigned char *data, int data_len, int *out_len, int quality); + The returned data will be freed with STBIW_FREE() (free() by default), + so it must be heap allocated with STBIW_MALLOC() (malloc() by default), + +UNICODE: + + If compiling for Windows and you wish to use Unicode filenames, compile + with + #define STBIW_WINDOWS_UTF8 + and pass utf8-encoded filenames. Call stbiw_convert_wchar_to_utf8 to convert + Windows wchar_t filenames to utf8. + +USAGE: + + There are five functions, one for each image file format: + + int stbi_write_png(char const *filename, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_tga(char const *filename, int w, int h, int comp, const void *data); + int stbi_write_jpg(char const *filename, int w, int h, int comp, const void *data, int quality); + int stbi_write_hdr(char const *filename, int w, int h, int comp, const float *data); + + void stbi_flip_vertically_on_write(int flag); // flag is non-zero to flip data vertically + + There are also five equivalent functions that use an arbitrary write function. You are + expected to open/close your file-equivalent before and after calling these: + + int stbi_write_png_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data, int stride_in_bytes); + int stbi_write_bmp_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); + int stbi_write_tga_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const void *data); + int stbi_write_hdr_to_func(stbi_write_func *func, void *context, int w, int h, int comp, const float *data); + int stbi_write_jpg_to_func(stbi_write_func *func, void *context, int x, int y, int comp, const void *data, int quality); + + where the callback is: + void stbi_write_func(void *context, void *data, int size); + + You can configure it with these global variables: + int stbi_write_tga_with_rle; // defaults to true; set to 0 to disable RLE + int stbi_write_png_compression_level; // defaults to 8; set to higher for more compression + int stbi_write_force_png_filter; // defaults to -1; set to 0..5 to force a filter mode + + + You can define STBI_WRITE_NO_STDIO to disable the file variant of these + functions, so the library will not use stdio.h at all. However, this will + also disable HDR writing, because it requires stdio for formatted output. + + Each function returns 0 on failure and non-0 on success. + + The functions create an image file defined by the parameters. The image + is a rectangle of pixels stored from left-to-right, top-to-bottom. + Each pixel contains 'comp' channels of data stored interleaved with 8-bits + per channel, in the following order: 1=Y, 2=YA, 3=RGB, 4=RGBA. (Y is + monochrome color.) The rectangle is 'w' pixels wide and 'h' pixels tall. + The *data pointer points to the first byte of the top-left-most pixel. + For PNG, "stride_in_bytes" is the distance in bytes from the first byte of + a row of pixels to the first byte of the next row of pixels. + + PNG creates output files with the same number of components as the input. + The BMP format expands Y to RGB in the file format and does not + output alpha. + + PNG supports writing rectangles of data even when the bytes storing rows of + data are not consecutive in memory (e.g. sub-rectangles of a larger image), + by supplying the stride between the beginning of adjacent rows. The other + formats do not. (Thus you cannot write a native-format BMP through the BMP + writer, both because it is in BGR order and because it may have padding + at the end of the line.) + + PNG allows you to set the deflate compression level by setting the global + variable 'stbi_write_png_compression_level' (it defaults to 8). + + HDR expects linear float data. Since the format is always 32-bit rgb(e) + data, alpha (if provided) is discarded, and for monochrome data it is + replicated across all three channels. + + TGA supports RLE or non-RLE compressed data. To use non-RLE-compressed + data, set the global variable 'stbi_write_tga_with_rle' to 0. + + JPEG does ignore alpha channels in input data; quality is between 1 and 100. + Higher quality looks better but results in a bigger image. + JPEG baseline (no JPEG progressive). + +CREDITS: + + + Sean Barrett - PNG/BMP/TGA + Baldur Karlsson - HDR + Jean-Sebastien Guay - TGA monochrome + Tim Kelsey - misc enhancements + Alan Hickman - TGA RLE + Emmanuel Julien - initial file IO callback implementation + Jon Olick - original jo_jpeg.cpp code + Daniel Gibson - integrate JPEG, allow external zlib + Aarni Koskela - allow choosing PNG filter + + bugfixes: + github:Chribba + Guillaume Chereau + github:jry2 + github:romigrou + Sergio Gonzalez + Jonas Karlsson + Filip Wasil + Thatcher Ulrich + github:poppolopoppo + Patrick Boettcher + github:xeekworx + Cap Petschulat + Simon Rodriguez + Ivan Tikhonov + github:ignotion + Adam Schackart + +LICENSE + + See end of file for license information. + +*/ + +#ifndef INCLUDE_STB_IMAGE_WRITE_H +#define INCLUDE_STB_IMAGE_WRITE_H + +#include + +// if STB_IMAGE_WRITE_STATIC causes problems, try defining STBIWDEF to 'inline' or 'static inline' +#ifndef STBIWDEF +#ifdef STB_IMAGE_WRITE_STATIC +#define STBIWDEF static +#else +#ifdef __cplusplus +#define STBIWDEF extern "C" +#else +#define STBIWDEF extern +#endif +#endif +#endif + +#ifndef STB_IMAGE_WRITE_STATIC // C++ forbids static forward declarations +extern int stbi_write_tga_with_rle; +extern int stbi_write_png_compression_level; +extern int stbi_write_force_png_filter; +#endif + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png( char const* filename, int w, int h, int comp, const void* data, int stride_in_bytes ); +STBIWDEF int stbi_write_bmp( char const* filename, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_tga( char const* filename, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_hdr( char const* filename, int w, int h, int comp, const float* data ); +STBIWDEF int stbi_write_jpg( char const* filename, int x, int y, int comp, const void* data, int quality ); + +#ifdef STBI_WINDOWS_UTF8 +STBIWDEF int stbiw_convert_wchar_to_utf8( char* buffer, size_t bufferlen, const wchar_t* input ); +#endif +#endif + +typedef void stbi_write_func( void* context, void* data, int size ); + +STBIWDEF int stbi_write_png_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data, int stride_in_bytes ); +STBIWDEF int stbi_write_bmp_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_tga_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const void* data ); +STBIWDEF int stbi_write_hdr_to_func( stbi_write_func* func, void* context, int w, int h, int comp, const float* data ); +STBIWDEF int stbi_write_jpg_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int quality ); + +STBIWDEF void stbi_flip_vertically_on_write( int flip_boolean ); + +#endif//INCLUDE_STB_IMAGE_WRITE_H + +#ifdef STB_IMAGE_WRITE_IMPLEMENTATION + +#ifdef _WIN32 +#ifndef _CRT_SECURE_NO_WARNINGS +#define _CRT_SECURE_NO_WARNINGS +#endif +#ifndef _CRT_NONSTDC_NO_DEPRECATE +#define _CRT_NONSTDC_NO_DEPRECATE +#endif +#endif + +#ifndef STBI_WRITE_NO_STDIO +#include +#endif // STBI_WRITE_NO_STDIO + +#include +#include +#include +#include + +#if defined(STBIW_MALLOC) && defined(STBIW_FREE) && (defined(STBIW_REALLOC) || defined(STBIW_REALLOC_SIZED)) +// ok +#elif !defined(STBIW_MALLOC) && !defined(STBIW_FREE) && !defined(STBIW_REALLOC) && !defined(STBIW_REALLOC_SIZED) +// ok +#else +#error "Must define all or none of STBIW_MALLOC, STBIW_FREE, and STBIW_REALLOC (or STBIW_REALLOC_SIZED)." +#endif + +#ifndef STBIW_MALLOC +#define STBIW_MALLOC(sz) malloc(sz) +#define STBIW_REALLOC(p,newsz) realloc(p,newsz) +#define STBIW_FREE(p) free(p) +#endif + +#ifndef STBIW_REALLOC_SIZED +#define STBIW_REALLOC_SIZED(p,oldsz,newsz) STBIW_REALLOC(p,newsz) +#endif + + +#ifndef STBIW_MEMMOVE +#define STBIW_MEMMOVE(a,b,sz) memmove(a,b,sz) +#endif + + +#ifndef STBIW_ASSERT +#include +#define STBIW_ASSERT(x) assert(x) +#endif + +#define STBIW_UCHAR(x) (unsigned char) ((x) & 0xff) + +#ifdef STB_IMAGE_WRITE_STATIC +static int stbi__flip_vertically_on_write = 0; +static int stbi_write_png_compression_level = 8; +static int stbi_write_tga_with_rle = 1; +static int stbi_write_force_png_filter = -1; +#else +int stbi_write_png_compression_level = 8; +int stbi__flip_vertically_on_write = 0; +int stbi_write_tga_with_rle = 1; +int stbi_write_force_png_filter = -1; +#endif + +STBIWDEF void stbi_flip_vertically_on_write( int flag ) +{ + stbi__flip_vertically_on_write = flag; +} + +typedef struct +{ + stbi_write_func* func; + void* context; +} stbi__write_context; + +// initialize a callback-based context +static void stbi__start_write_callbacks( stbi__write_context* s, stbi_write_func* c, void* context ) +{ + s->func = c; + s->context = context; +} + +#ifndef STBI_WRITE_NO_STDIO + +static void stbi__stdio_write( void* context, void* data, int size ) +{ + fwrite( data, 1, size, (FILE*)context ); +} + +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) +#ifdef __cplusplus +#define STBIW_EXTERN extern "C" +#else +#define STBIW_EXTERN extern +#endif +STBIW_EXTERN __declspec( dllimport ) int __stdcall MultiByteToWideChar( unsigned int cp, unsigned long flags, const char* str, int cbmb, wchar_t* widestr, int cchwide ); +STBIW_EXTERN __declspec( dllimport ) int __stdcall WideCharToMultiByte( unsigned int cp, unsigned long flags, const wchar_t* widestr, int cchwide, char* str, int cbmb, const char* defchar, int* used_default ); + +STBIWDEF int stbiw_convert_wchar_to_utf8( char* buffer, size_t bufferlen, const wchar_t* input ) +{ + return WideCharToMultiByte( 65001 /* UTF8 */, 0, input, -1, buffer, (int)bufferlen, NULL, NULL ); +} +#endif + +static FILE* stbiw__fopen( char const* filename, char const* mode ) +{ + FILE* f; +#if defined(_MSC_VER) && defined(STBI_WINDOWS_UTF8) + wchar_t wMode[64]; + wchar_t wFilename[1024]; + if ( 0 == MultiByteToWideChar( 65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof( wFilename ) ) ) + return 0; + + if ( 0 == MultiByteToWideChar( 65001 /* UTF8 */, 0, mode, -1, wMode, sizeof( wMode ) ) ) + return 0; + +#if _MSC_VER >= 1400 + if ( 0 != _wfopen_s( &f, wFilename, wMode ) ) + f = 0; +#else + f = _wfopen( wFilename, wMode ); +#endif + +#elif defined(_MSC_VER) && _MSC_VER >= 1400 + if ( 0 != fopen_s( &f, filename, mode ) ) + f = 0; +#else + f = fopen( filename, mode ); +#endif + return f; +} + +static int stbi__start_write_file( stbi__write_context* s, const char* filename ) +{ + FILE* f = stbiw__fopen( filename, "wb" ); + stbi__start_write_callbacks( s, stbi__stdio_write, (void*)f ); + return f != NULL; +} + +static void stbi__end_write_file( stbi__write_context* s ) +{ + fclose( (FILE*)s->context ); +} + +#endif // !STBI_WRITE_NO_STDIO + +typedef unsigned int stbiw_uint32; +typedef int stb_image_write_test[sizeof( stbiw_uint32 ) == 4 ? 1 : -1]; + +static void stbiw__writefv( stbi__write_context* s, const char* fmt, va_list v ) +{ + while ( *fmt ) { + switch ( *fmt++ ) { + case ' ': break; + case '1': { unsigned char x = STBIW_UCHAR( va_arg( v, int ) ); + s->func( s->context, &x, 1 ); + break; } + case '2': { int x = va_arg( v, int ); + unsigned char b[2]; + b[0] = STBIW_UCHAR( x ); + b[1] = STBIW_UCHAR( x >> 8 ); + s->func( s->context, b, 2 ); + break; } + case '4': { stbiw_uint32 x = va_arg( v, int ); + unsigned char b[4]; + b[0] = STBIW_UCHAR( x ); + b[1] = STBIW_UCHAR( x >> 8 ); + b[2] = STBIW_UCHAR( x >> 16 ); + b[3] = STBIW_UCHAR( x >> 24 ); + s->func( s->context, b, 4 ); + break; } + default: + STBIW_ASSERT( 0 ); + return; + } + } +} + +static void stbiw__writef( stbi__write_context* s, const char* fmt, ... ) +{ + va_list v; + va_start( v, fmt ); + stbiw__writefv( s, fmt, v ); + va_end( v ); +} + +static void stbiw__putc( stbi__write_context* s, unsigned char c ) +{ + s->func( s->context, &c, 1 ); +} + +static void stbiw__write3( stbi__write_context* s, unsigned char a, unsigned char b, unsigned char c ) +{ + unsigned char arr[3]; + arr[0] = a; arr[1] = b; arr[2] = c; + s->func( s->context, arr, 3 ); +} + +static void stbiw__write_pixel( stbi__write_context* s, int rgb_dir, int comp, int write_alpha, int expand_mono, unsigned char* d ) +{ + unsigned char bg[3] = { 255, 0, 255 }, px[3]; + int k; + + if ( write_alpha < 0 ) + s->func( s->context, &d[comp - 1], 1 ); + + switch ( comp ) { + case 2: // 2 pixels = mono + alpha, alpha is written separately, so same as 1-channel case + case 1: + if ( expand_mono ) + stbiw__write3( s, d[0], d[0], d[0] ); // monochrome bmp + else + s->func( s->context, d, 1 ); // monochrome TGA + break; + case 4: + if ( !write_alpha ) { + // composite against pink background + for ( k = 0; k < 3; ++k ) + px[k] = bg[k] + ( ( d[k] - bg[k] ) * d[3] ) / 255; + stbiw__write3( s, px[1 - rgb_dir], px[1], px[1 + rgb_dir] ); + break; + } + /* FALLTHROUGH */ + case 3: + stbiw__write3( s, d[1 - rgb_dir], d[1], d[1 + rgb_dir] ); + break; + } + if ( write_alpha > 0 ) + s->func( s->context, &d[comp - 1], 1 ); +} + +static void stbiw__write_pixels( stbi__write_context* s, int rgb_dir, int vdir, int x, int y, int comp, void* data, int write_alpha, int scanline_pad, int expand_mono ) +{ + stbiw_uint32 zero = 0; + int i, j, j_end; + + if ( y <= 0 ) + return; + + if ( stbi__flip_vertically_on_write ) + vdir *= -1; + + if ( vdir < 0 ) { + j_end = -1; j = y - 1; + } + else { + j_end = y; j = 0; + } + + for ( ; j != j_end; j += vdir ) { + for ( i = 0; i < x; ++i ) { + unsigned char* d = (unsigned char*)data + ( j * x + i ) * comp; + stbiw__write_pixel( s, rgb_dir, comp, write_alpha, expand_mono, d ); + } + s->func( s->context, &zero, scanline_pad ); + } +} + +static int stbiw__outfile( stbi__write_context* s, int rgb_dir, int vdir, int x, int y, int comp, int expand_mono, void* data, int alpha, int pad, const char* fmt, ... ) +{ + if ( y < 0 || x < 0 ) { + return 0; + } + else { + va_list v; + va_start( v, fmt ); + stbiw__writefv( s, fmt, v ); + va_end( v ); + stbiw__write_pixels( s, rgb_dir, vdir, x, y, comp, data, alpha, pad, expand_mono ); + return 1; + } +} + +static int stbi_write_bmp_core( stbi__write_context* s, int x, int y, int comp, const void* data ) +{ + int pad = ( -x * 3 ) & 3; + return stbiw__outfile( s, -1, -1, x, y, comp, 1, (void*)data, 0, pad, + "11 4 22 4" "4 44 22 444444", + 'B', 'M', 14 + 40 + ( x * 3 + pad ) * y, 0, 0, 14 + 40, // file header + 40, x, y, 1, 24, 0, 0, 0, 0, 0, 0 ); // bitmap header +} + +STBIWDEF int stbi_write_bmp_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data ) +{ + stbi__write_context s; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_bmp_core( &s, x, y, comp, data ); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_bmp( char const* filename, int x, int y, int comp, const void* data ) +{ + stbi__write_context s; + if ( stbi__start_write_file( &s, filename ) ) { + int r = stbi_write_bmp_core( &s, x, y, comp, data ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif //!STBI_WRITE_NO_STDIO + +static int stbi_write_tga_core( stbi__write_context* s, int x, int y, int comp, void* data ) +{ + int has_alpha = ( comp == 2 || comp == 4 ); + int colorbytes = has_alpha ? comp - 1 : comp; + int format = colorbytes < 2 ? 3 : 2; // 3 color channels (RGB/RGBA) = 2, 1 color channel (Y/YA) = 3 + + if ( y < 0 || x < 0 ) + return 0; + + if ( !stbi_write_tga_with_rle ) { + return stbiw__outfile( s, -1, -1, x, y, comp, 0, (void*)data, has_alpha, 0, + "111 221 2222 11", 0, 0, format, 0, 0, 0, 0, 0, x, y, ( colorbytes + has_alpha ) * 8, has_alpha * 8 ); + } + else { + int i, j, k; + int jend, jdir; + + stbiw__writef( s, "111 221 2222 11", 0, 0, format + 8, 0, 0, 0, 0, 0, x, y, ( colorbytes + has_alpha ) * 8, has_alpha * 8 ); + + if ( stbi__flip_vertically_on_write ) { + j = 0; + jend = y; + jdir = 1; + } + else { + j = y - 1; + jend = -1; + jdir = -1; + } + for ( ; j != jend; j += jdir ) { + unsigned char* row = (unsigned char*)data + j * x * comp; + int len; + + for ( i = 0; i < x; i += len ) { + unsigned char* begin = row + i * comp; + int diff = 1; + len = 1; + + if ( i < x - 1 ) { + ++len; + diff = memcmp( begin, row + ( i + 1 ) * comp, comp ); + if ( diff ) { + const unsigned char* prev = begin; + for ( k = i + 2; k < x && len < 128; ++k ) { + if ( memcmp( prev, row + k * comp, comp ) ) { + prev += comp; + ++len; + } + else { + --len; + break; + } + } + } + else { + for ( k = i + 2; k < x && len < 128; ++k ) { + if ( !memcmp( begin, row + k * comp, comp ) ) { + ++len; + } + else { + break; + } + } + } + } + + if ( diff ) { + unsigned char header = STBIW_UCHAR( len - 1 ); + s->func( s->context, &header, 1 ); + for ( k = 0; k < len; ++k ) { + stbiw__write_pixel( s, -1, comp, has_alpha, 0, begin + k * comp ); + } + } + else { + unsigned char header = STBIW_UCHAR( len - 129 ); + s->func( s->context, &header, 1 ); + stbiw__write_pixel( s, -1, comp, has_alpha, 0, begin ); + } + } + } + } + return 1; +} + +STBIWDEF int stbi_write_tga_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data ) +{ + stbi__write_context s; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_tga_core( &s, x, y, comp, (void*)data ); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_tga( char const* filename, int x, int y, int comp, const void* data ) +{ + stbi__write_context s; + if ( stbi__start_write_file( &s, filename ) ) { + int r = stbi_write_tga_core( &s, x, y, comp, (void*)data ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif + +// ************************************************************************************************* +// Radiance RGBE HDR writer +// by Baldur Karlsson + +#define stbiw__max(a, b) ((a) > (b) ? (a) : (b)) + +static void stbiw__linear_to_rgbe( unsigned char* rgbe, float* linear ) +{ + int exponent; + float maxcomp = stbiw__max( linear[0], stbiw__max( linear[1], linear[2] ) ); + + if ( maxcomp < 1e-32f ) { + rgbe[0] = rgbe[1] = rgbe[2] = rgbe[3] = 0; + } + else { + float normalize = (float)frexp( maxcomp, &exponent ) * 256.0f / maxcomp; + + rgbe[0] = (unsigned char)( linear[0] * normalize ); + rgbe[1] = (unsigned char)( linear[1] * normalize ); + rgbe[2] = (unsigned char)( linear[2] * normalize ); + rgbe[3] = (unsigned char)( exponent + 128 ); + } +} + +static void stbiw__write_run_data( stbi__write_context* s, int length, unsigned char databyte ) +{ + unsigned char lengthbyte = STBIW_UCHAR( length + 128 ); + STBIW_ASSERT( length + 128 <= 255 ); + s->func( s->context, &lengthbyte, 1 ); + s->func( s->context, &databyte, 1 ); +} + +static void stbiw__write_dump_data( stbi__write_context* s, int length, unsigned char* data ) +{ + unsigned char lengthbyte = STBIW_UCHAR( length ); + STBIW_ASSERT( length <= 128 ); // inconsistent with spec but consistent with official code + s->func( s->context, &lengthbyte, 1 ); + s->func( s->context, data, length ); +} + +static void stbiw__write_hdr_scanline( stbi__write_context* s, int width, int ncomp, unsigned char* scratch, float* scanline ) +{ + unsigned char scanlineheader[4] = { 2, 2, 0, 0 }; + unsigned char rgbe[4]; + float linear[3]; + int x; + + scanlineheader[2] = ( width & 0xff00 ) >> 8; + scanlineheader[3] = ( width & 0x00ff ); + + /* skip RLE for images too small or large */ + if ( width < 8 || width >= 32768 ) { + for ( x = 0; x < width; x++ ) { + switch ( ncomp ) { + case 4: /* fallthrough */ + case 3: linear[2] = scanline[x * ncomp + 2]; + linear[1] = scanline[x * ncomp + 1]; + linear[0] = scanline[x * ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x * ncomp + 0]; + break; + } + stbiw__linear_to_rgbe( rgbe, linear ); + s->func( s->context, rgbe, 4 ); + } + } + else { + int c, r; + /* encode into scratch buffer */ + for ( x = 0; x < width; x++ ) { + switch ( ncomp ) { + case 4: /* fallthrough */ + case 3: linear[2] = scanline[x * ncomp + 2]; + linear[1] = scanline[x * ncomp + 1]; + linear[0] = scanline[x * ncomp + 0]; + break; + default: + linear[0] = linear[1] = linear[2] = scanline[x * ncomp + 0]; + break; + } + stbiw__linear_to_rgbe( rgbe, linear ); + scratch[x + width * 0] = rgbe[0]; + scratch[x + width * 1] = rgbe[1]; + scratch[x + width * 2] = rgbe[2]; + scratch[x + width * 3] = rgbe[3]; + } + + s->func( s->context, scanlineheader, 4 ); + + /* RLE each component separately */ + for ( c = 0; c < 4; c++ ) { + unsigned char* comp = &scratch[width * c]; + + x = 0; + while ( x < width ) { + // find first run + r = x; + while ( r + 2 < width ) { + if ( comp[r] == comp[r + 1] && comp[r] == comp[r + 2] ) + break; + ++r; + } + if ( r + 2 >= width ) + r = width; + // dump up to first run + while ( x < r ) { + int len = r - x; + if ( len > 128 ) len = 128; + stbiw__write_dump_data( s, len, &comp[x] ); + x += len; + } + // if there's a run, output it + if ( r + 2 < width ) { // same test as what we break out of in search loop, so only true if we break'd + // find next byte after run + while ( r < width && comp[r] == comp[x] ) + ++r; + // output run up to r + while ( x < r ) { + int len = r - x; + if ( len > 127 ) len = 127; + stbiw__write_run_data( s, len, comp[x] ); + x += len; + } + } + } + } + } +} + +static int stbi_write_hdr_core( stbi__write_context* s, int x, int y, int comp, float* data ) +{ + if ( y <= 0 || x <= 0 || data == NULL ) + return 0; + else { + // Each component is stored separately. Allocate scratch space for full output scanline. + unsigned char* scratch = (unsigned char*)STBIW_MALLOC( x * 4 ); + int i, len; + char buffer[128]; + char header[] = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n"; + s->func( s->context, header, sizeof( header ) - 1 ); + +#ifdef __STDC_WANT_SECURE_LIB__ + len = sprintf_s( buffer, sizeof( buffer ), "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x ); +#else + len = sprintf( buffer, "EXPOSURE= 1.0000000000000\n\n-Y %d +X %d\n", y, x ); +#endif + s->func( s->context, buffer, len ); + + for ( i = 0; i < y; i++ ) + stbiw__write_hdr_scanline( s, x, comp, scratch, data + comp * x * ( stbi__flip_vertically_on_write ? y - 1 - i : i ) ); + STBIW_FREE( scratch ); + return 1; + } +} + +STBIWDEF int stbi_write_hdr_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const float* data ) +{ + stbi__write_context s; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_hdr_core( &s, x, y, comp, (float*)data ); +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_hdr( char const* filename, int x, int y, int comp, const float* data ) +{ + stbi__write_context s; + if ( stbi__start_write_file( &s, filename ) ) { + int r = stbi_write_hdr_core( &s, x, y, comp, (float*)data ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif // STBI_WRITE_NO_STDIO + + +////////////////////////////////////////////////////////////////////////////// +// +// PNG writer +// + +#ifndef STBIW_ZLIB_COMPRESS +// stretchy buffer; stbiw__sbpush() == vector<>::push_back() -- stbiw__sbcount() == vector<>::size() +#define stbiw__sbraw(a) ((int *) (a) - 2) +#define stbiw__sbm(a) stbiw__sbraw(a)[0] +#define stbiw__sbn(a) stbiw__sbraw(a)[1] + +#define stbiw__sbneedgrow(a,n) ((a)==0 || stbiw__sbn(a)+n >= stbiw__sbm(a)) +#define stbiw__sbmaybegrow(a,n) (stbiw__sbneedgrow(a,(n)) ? stbiw__sbgrow(a,n) : 0) +#define stbiw__sbgrow(a,n) stbiw__sbgrowf((void **) &(a), (n), sizeof(*(a))) + +#define stbiw__sbpush(a, v) (stbiw__sbmaybegrow(a,1), (a)[stbiw__sbn(a)++] = (v)) +#define stbiw__sbcount(a) ((a) ? stbiw__sbn(a) : 0) +#define stbiw__sbfree(a) ((a) ? STBIW_FREE(stbiw__sbraw(a)),0 : 0) + +static void* stbiw__sbgrowf( void** arr, int increment, int itemsize ) +{ + int m = *arr ? 2 * stbiw__sbm( *arr ) + increment : increment + 1; + void* p = STBIW_REALLOC_SIZED( *arr ? stbiw__sbraw( *arr ) : 0, *arr ? ( stbiw__sbm( *arr ) * itemsize + sizeof( int ) * 2 ) : 0, itemsize * m + sizeof( int ) * 2 ); + STBIW_ASSERT( p ); + if ( p ) { + if ( !*arr ) ( (int*)p )[1] = 0; + *arr = (void*)( (int*)p + 2 ); + stbiw__sbm( *arr ) = m; + } + return *arr; +} + +static unsigned char* stbiw__zlib_flushf( unsigned char* data, unsigned int* bitbuffer, int* bitcount ) +{ + while ( *bitcount >= 8 ) { + stbiw__sbpush( data, STBIW_UCHAR( *bitbuffer ) ); + *bitbuffer >>= 8; + *bitcount -= 8; + } + return data; +} + +static int stbiw__zlib_bitrev( int code, int codebits ) +{ + int res = 0; + while ( codebits-- ) { + res = ( res << 1 ) | ( code & 1 ); + code >>= 1; + } + return res; +} + +static unsigned int stbiw__zlib_countm( unsigned char* a, unsigned char* b, int limit ) +{ + int i; + for ( i = 0; i < limit && i < 258; ++i ) + if ( a[i] != b[i] ) break; + return i; +} + +static unsigned int stbiw__zhash( unsigned char* data ) +{ + stbiw_uint32 hash = data[0] + ( data[1] << 8 ) + ( data[2] << 16 ); + hash ^= hash << 3; + hash += hash >> 5; + hash ^= hash << 4; + hash += hash >> 17; + hash ^= hash << 25; + hash += hash >> 6; + return hash; +} + +#define stbiw__zlib_flush() (out = stbiw__zlib_flushf(out, &bitbuf, &bitcount)) +#define stbiw__zlib_add(code,codebits) \ + (bitbuf |= (code) << bitcount, bitcount += (codebits), stbiw__zlib_flush()) +#define stbiw__zlib_huffa(b,c) stbiw__zlib_add(stbiw__zlib_bitrev(b,c),c) +// default huffman tables +#define stbiw__zlib_huff1(n) stbiw__zlib_huffa(0x30 + (n), 8) +#define stbiw__zlib_huff2(n) stbiw__zlib_huffa(0x190 + (n)-144, 9) +#define stbiw__zlib_huff3(n) stbiw__zlib_huffa(0 + (n)-256,7) +#define stbiw__zlib_huff4(n) stbiw__zlib_huffa(0xc0 + (n)-280,8) +#define stbiw__zlib_huff(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : (n) <= 255 ? stbiw__zlib_huff2(n) : (n) <= 279 ? stbiw__zlib_huff3(n) : stbiw__zlib_huff4(n)) +#define stbiw__zlib_huffb(n) ((n) <= 143 ? stbiw__zlib_huff1(n) : stbiw__zlib_huff2(n)) + +#define stbiw__ZHASH 16384 + +#endif // STBIW_ZLIB_COMPRESS + +STBIWDEF unsigned char* stbi_zlib_compress( unsigned char* data, int data_len, int* out_len, int quality ) +{ +#ifdef STBIW_ZLIB_COMPRESS + // user provided a zlib compress implementation, use that + return STBIW_ZLIB_COMPRESS( data, data_len, out_len, quality ); +#else // use builtin + static unsigned short lengthc[] = { 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, 259 }; + static unsigned char lengtheb[] = { 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 }; + static unsigned short distc[] = { 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, 32768 }; + static unsigned char disteb[] = { 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 }; + unsigned int bitbuf = 0; + int i, j, bitcount = 0; + unsigned char* out = NULL; + unsigned char*** hash_table = (unsigned char***)STBIW_MALLOC( stbiw__ZHASH * sizeof( unsigned char** ) ); + if ( hash_table == NULL ) + return NULL; + if ( quality < 5 ) quality = 5; + + stbiw__sbpush( out, 0x78 ); // DEFLATE 32K window + stbiw__sbpush( out, 0x5e ); // FLEVEL = 1 + stbiw__zlib_add( 1, 1 ); // BFINAL = 1 + stbiw__zlib_add( 1, 2 ); // BTYPE = 1 -- fixed huffman + + for ( i = 0; i < stbiw__ZHASH; ++i ) + hash_table[i] = NULL; + + i = 0; + while ( i < data_len - 3 ) { + // hash next 3 bytes of data to be compressed + int h = stbiw__zhash( data + i ) & ( stbiw__ZHASH - 1 ), best = 3; + unsigned char* bestloc = 0; + unsigned char** hlist = hash_table[h]; + int n = stbiw__sbcount( hlist ); + for ( j = 0; j < n; ++j ) { + if ( hlist[j] - data > i - 32768 ) { // if entry lies within window + int d = stbiw__zlib_countm( hlist[j], data + i, data_len - i ); + if ( d >= best ) { best = d; bestloc = hlist[j]; } + } + } + // when hash table entry is too long, delete half the entries + if ( hash_table[h] && stbiw__sbn( hash_table[h] ) == 2 * quality ) { + STBIW_MEMMOVE( hash_table[h], hash_table[h] + quality, sizeof( hash_table[h][0] ) * quality ); + stbiw__sbn( hash_table[h] ) = quality; + } + stbiw__sbpush( hash_table[h], data + i ); + + if ( bestloc ) { + // "lazy matching" - check match at *next* byte, and if it's better, do cur byte as literal + h = stbiw__zhash( data + i + 1 ) & ( stbiw__ZHASH - 1 ); + hlist = hash_table[h]; + n = stbiw__sbcount( hlist ); + for ( j = 0; j < n; ++j ) { + if ( hlist[j] - data > i - 32767 ) { + int e = stbiw__zlib_countm( hlist[j], data + i + 1, data_len - i - 1 ); + if ( e > best ) { // if next match is better, bail on current match + bestloc = NULL; + break; + } + } + } + } + + if ( bestloc ) { + int d = (int)( data + i - bestloc ); // distance back + STBIW_ASSERT( d <= 32767 && best <= 258 ); + for ( j = 0; best > lengthc[j + 1] - 1; ++j ); + stbiw__zlib_huff( j + 257 ); + if ( lengtheb[j] ) stbiw__zlib_add( best - lengthc[j], lengtheb[j] ); + for ( j = 0; d > distc[j + 1] - 1; ++j ); + stbiw__zlib_add( stbiw__zlib_bitrev( j, 5 ), 5 ); + if ( disteb[j] ) stbiw__zlib_add( d - distc[j], disteb[j] ); + i += best; + } + else { + stbiw__zlib_huffb( data[i] ); + ++i; + } + } + // write out final bytes + for ( ; i < data_len; ++i ) + stbiw__zlib_huffb( data[i] ); + stbiw__zlib_huff( 256 ); // end of block + // pad with 0 bits to byte boundary + while ( bitcount ) + stbiw__zlib_add( 0, 1 ); + + for ( i = 0; i < stbiw__ZHASH; ++i ) + (void)stbiw__sbfree( hash_table[i] ); + STBIW_FREE( hash_table ); + + { + // compute adler32 on input + unsigned int s1 = 1, s2 = 0; + int blocklen = (int)( data_len % 5552 ); + j = 0; + while ( j < data_len ) { + for ( i = 0; i < blocklen; ++i ) { s1 += data[j + i]; s2 += s1; } + s1 %= 65521; s2 %= 65521; + j += blocklen; + blocklen = 5552; + } + stbiw__sbpush( out, STBIW_UCHAR( s2 >> 8 ) ); + stbiw__sbpush( out, STBIW_UCHAR( s2 ) ); + stbiw__sbpush( out, STBIW_UCHAR( s1 >> 8 ) ); + stbiw__sbpush( out, STBIW_UCHAR( s1 ) ); + } + *out_len = stbiw__sbn( out ); + // make returned pointer freeable + STBIW_MEMMOVE( stbiw__sbraw( out ), out, *out_len ); + return (unsigned char*)stbiw__sbraw( out ); +#endif // STBIW_ZLIB_COMPRESS +} + +static unsigned int stbiw__crc32( unsigned char* buffer, int len ) +{ +#ifdef STBIW_CRC32 + return STBIW_CRC32( buffer, len ); +#else + static unsigned int crc_table[256] = + { + 0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3, + 0x0eDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, + 0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7, + 0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5, + 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172, 0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, + 0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59, + 0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F, + 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924, 0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, + 0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433, + 0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01, + 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E, 0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, + 0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65, + 0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB, + 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0, 0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, + 0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F, + 0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD, + 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A, 0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, + 0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1, + 0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7, + 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC, 0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, + 0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B, + 0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79, + 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236, 0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, + 0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D, + 0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713, + 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38, 0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, + 0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777, + 0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45, + 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2, 0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, + 0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9, + 0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF, + 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94, 0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D + }; + + unsigned int crc = ~0u; + int i; + for ( i = 0; i < len; ++i ) + crc = ( crc >> 8 ) ^ crc_table[buffer[i] ^ ( crc & 0xff )]; + return ~crc; +#endif +} + +#define stbiw__wpng4(o,a,b,c,d) ((o)[0]=STBIW_UCHAR(a),(o)[1]=STBIW_UCHAR(b),(o)[2]=STBIW_UCHAR(c),(o)[3]=STBIW_UCHAR(d),(o)+=4) +#define stbiw__wp32(data,v) stbiw__wpng4(data, (v)>>24,(v)>>16,(v)>>8,(v)); +#define stbiw__wptag(data,s) stbiw__wpng4(data, s[0],s[1],s[2],s[3]) + +static void stbiw__wpcrc( unsigned char** data, int len ) +{ + unsigned int crc = stbiw__crc32( *data - len - 4, len + 4 ); + stbiw__wp32( *data, crc ); +} + +static unsigned char stbiw__paeth( int a, int b, int c ) +{ + int p = a + b - c, pa = abs( p - a ), pb = abs( p - b ), pc = abs( p - c ); + if ( pa <= pb && pa <= pc ) return STBIW_UCHAR( a ); + if ( pb <= pc ) return STBIW_UCHAR( b ); + return STBIW_UCHAR( c ); +} + +// @OPTIMIZE: provide an option that always forces left-predict or paeth predict +static void stbiw__encode_png_line( unsigned char* pixels, int stride_bytes, int width, int height, int y, int n, int filter_type, signed char* line_buffer ) +{ + static int mapping[] = { 0,1,2,3,4 }; + static int firstmap[] = { 0,1,0,5,6 }; + int* mymap = ( y != 0 ) ? mapping : firstmap; + int i; + int type = mymap[filter_type]; + unsigned char* z = pixels + stride_bytes * ( stbi__flip_vertically_on_write ? height - 1 - y : y ); + int signed_stride = stbi__flip_vertically_on_write ? -stride_bytes : stride_bytes; + + if ( type == 0 ) { + memcpy( line_buffer, z, width * n ); + return; + } + + // first loop isn't optimized since it's just one pixel + for ( i = 0; i < n; ++i ) { + switch ( type ) { + case 1: line_buffer[i] = z[i]; break; + case 2: line_buffer[i] = z[i] - z[i - signed_stride]; break; + case 3: line_buffer[i] = z[i] - ( z[i - signed_stride] >> 1 ); break; + case 4: line_buffer[i] = (signed char)( z[i] - stbiw__paeth( 0, z[i - signed_stride], 0 ) ); break; + case 5: line_buffer[i] = z[i]; break; + case 6: line_buffer[i] = z[i]; break; + } + } + switch ( type ) { + case 1: for ( i = n; i < width * n; ++i ) line_buffer[i] = z[i] - z[i - n]; break; + case 2: for ( i = n; i < width * n; ++i ) line_buffer[i] = z[i] - z[i - signed_stride]; break; + case 3: for ( i = n; i < width * n; ++i ) line_buffer[i] = z[i] - ( ( z[i - n] + z[i - signed_stride] ) >> 1 ); break; + case 4: for ( i = n; i < width * n; ++i ) line_buffer[i] = z[i] - stbiw__paeth( z[i - n], z[i - signed_stride], z[i - signed_stride - n] ); break; + case 5: for ( i = n; i < width * n; ++i ) line_buffer[i] = z[i] - ( z[i - n] >> 1 ); break; + case 6: for ( i = n; i < width * n; ++i ) line_buffer[i] = z[i] - stbiw__paeth( z[i - n], 0, 0 ); break; + } +} + +STBIWDEF unsigned char* stbi_write_png_to_mem( const unsigned char* pixels, int stride_bytes, int x, int y, int n, int* out_len ) +{ + int force_filter = stbi_write_force_png_filter; + int ctype[5] = { -1, 0, 4, 2, 6 }; + unsigned char sig[8] = { 137,80,78,71,13,10,26,10 }; + unsigned char* out, * o, * filt, * zlib; + signed char* line_buffer; + int j, zlen; + + if ( stride_bytes == 0 ) + stride_bytes = x * n; + + if ( force_filter >= 5 ) { + force_filter = -1; + } + + filt = (unsigned char*)STBIW_MALLOC( ( x * n + 1 ) * y ); if ( !filt ) return 0; + line_buffer = (signed char*)STBIW_MALLOC( x * n ); if ( !line_buffer ) { STBIW_FREE( filt ); return 0; } + for ( j = 0; j < y; ++j ) { + int filter_type; + if ( force_filter > -1 ) { + filter_type = force_filter; + stbiw__encode_png_line( (unsigned char*)( pixels ), stride_bytes, x, y, j, n, force_filter, line_buffer ); + } + else { // Estimate the best filter by running through all of them: + int best_filter = 0, best_filter_val = 0x7fffffff, est, i; + for ( filter_type = 0; filter_type < 5; filter_type++ ) { + stbiw__encode_png_line( (unsigned char*)( pixels ), stride_bytes, x, y, j, n, filter_type, line_buffer ); + + // Estimate the entropy of the line using this filter; the less, the better. + est = 0; + for ( i = 0; i < x * n; ++i ) { + est += abs( (signed char)line_buffer[i] ); + } + if ( est < best_filter_val ) { + best_filter_val = est; + best_filter = filter_type; + } + } + if ( filter_type != best_filter ) { // If the last iteration already got us the best filter, don't redo it + stbiw__encode_png_line( (unsigned char*)( pixels ), stride_bytes, x, y, j, n, best_filter, line_buffer ); + filter_type = best_filter; + } + } + // when we get here, filter_type contains the filter type, and line_buffer contains the data + filt[j * ( x * n + 1 )] = (unsigned char)filter_type; + STBIW_MEMMOVE( filt + j * ( x * n + 1 ) + 1, line_buffer, x * n ); + } + STBIW_FREE( line_buffer ); + zlib = stbi_zlib_compress( filt, y * ( x * n + 1 ), &zlen, stbi_write_png_compression_level ); + STBIW_FREE( filt ); + if ( !zlib ) return 0; + + // each tag requires 12 bytes of overhead + out = (unsigned char*)STBIW_MALLOC( 8 + 12 + 13 + 12 + zlen + 12 ); + if ( !out ) return 0; + *out_len = 8 + 12 + 13 + 12 + zlen + 12; + + o = out; + STBIW_MEMMOVE( o, sig, 8 ); o += 8; + stbiw__wp32( o, 13 ); // header length + stbiw__wptag( o, "IHDR" ); + stbiw__wp32( o, x ); + stbiw__wp32( o, y ); + *o++ = 8; + *o++ = STBIW_UCHAR( ctype[n] ); + *o++ = 0; + *o++ = 0; + *o++ = 0; + stbiw__wpcrc( &o, 13 ); + + stbiw__wp32( o, zlen ); + stbiw__wptag( o, "IDAT" ); + STBIW_MEMMOVE( o, zlib, zlen ); + o += zlen; + STBIW_FREE( zlib ); + stbiw__wpcrc( &o, zlen ); + + stbiw__wp32( o, 0 ); + stbiw__wptag( o, "IEND" ); + stbiw__wpcrc( &o, 0 ); + + STBIW_ASSERT( o == out + *out_len ); + + return out; +} + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_png( char const* filename, int x, int y, int comp, const void* data, int stride_bytes ) +{ + FILE* f; + int len; + unsigned char* png = stbi_write_png_to_mem( (const unsigned char*)data, stride_bytes, x, y, comp, &len ); + if ( png == NULL ) return 0; + + f = stbiw__fopen( filename, "wb" ); + if ( !f ) { STBIW_FREE( png ); return 0; } + fwrite( png, 1, len, f ); + fclose( f ); + STBIW_FREE( png ); + return 1; +} +#endif + +STBIWDEF int stbi_write_png_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int stride_bytes ) +{ + int len; + unsigned char* png = stbi_write_png_to_mem( (const unsigned char*)data, stride_bytes, x, y, comp, &len ); + if ( png == NULL ) return 0; + func( context, png, len ); + STBIW_FREE( png ); + return 1; +} + + +/* *************************************************************************** + * + * JPEG writer + * + * This is based on Jon Olick's jo_jpeg.cpp: + * public domain Simple, Minimalistic JPEG writer - http://www.jonolick.com/code.html + */ + +static const unsigned char stbiw__jpg_ZigZag[] = { 0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18, + 24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63 }; + +static void stbiw__jpg_writeBits( stbi__write_context* s, int* bitBufP, int* bitCntP, const unsigned short* bs ) { + int bitBuf = *bitBufP, bitCnt = *bitCntP; + bitCnt += bs[1]; + bitBuf |= bs[0] << ( 24 - bitCnt ); + while ( bitCnt >= 8 ) { + unsigned char c = ( bitBuf >> 16 ) & 255; + stbiw__putc( s, c ); + if ( c == 255 ) { + stbiw__putc( s, 0 ); + } + bitBuf <<= 8; + bitCnt -= 8; + } + *bitBufP = bitBuf; + *bitCntP = bitCnt; +} + +static void stbiw__jpg_DCT( float* d0p, float* d1p, float* d2p, float* d3p, float* d4p, float* d5p, float* d6p, float* d7p ) { + float d0 = *d0p, d1 = *d1p, d2 = *d2p, d3 = *d3p, d4 = *d4p, d5 = *d5p, d6 = *d6p, d7 = *d7p; + float z1, z2, z3, z4, z5, z11, z13; + + float tmp0 = d0 + d7; + float tmp7 = d0 - d7; + float tmp1 = d1 + d6; + float tmp6 = d1 - d6; + float tmp2 = d2 + d5; + float tmp5 = d2 - d5; + float tmp3 = d3 + d4; + float tmp4 = d3 - d4; + + // Even part + float tmp10 = tmp0 + tmp3; // phase 2 + float tmp13 = tmp0 - tmp3; + float tmp11 = tmp1 + tmp2; + float tmp12 = tmp1 - tmp2; + + d0 = tmp10 + tmp11; // phase 3 + d4 = tmp10 - tmp11; + + z1 = ( tmp12 + tmp13 ) * 0.707106781f; // c4 + d2 = tmp13 + z1; // phase 5 + d6 = tmp13 - z1; + + // Odd part + tmp10 = tmp4 + tmp5; // phase 2 + tmp11 = tmp5 + tmp6; + tmp12 = tmp6 + tmp7; + + // The rotator is modified from fig 4-8 to avoid extra negations. + z5 = ( tmp10 - tmp12 ) * 0.382683433f; // c6 + z2 = tmp10 * 0.541196100f + z5; // c2-c6 + z4 = tmp12 * 1.306562965f + z5; // c2+c6 + z3 = tmp11 * 0.707106781f; // c4 + + z11 = tmp7 + z3; // phase 5 + z13 = tmp7 - z3; + + *d5p = z13 + z2; // phase 6 + *d3p = z13 - z2; + *d1p = z11 + z4; + *d7p = z11 - z4; + + *d0p = d0; *d2p = d2; *d4p = d4; *d6p = d6; +} + +static void stbiw__jpg_calcBits( int val, unsigned short bits[2] ) { + int tmp1 = val < 0 ? -val : val; + val = val < 0 ? val - 1 : val; + bits[1] = 1; + while ( tmp1 >>= 1 ) { + ++bits[1]; + } + bits[0] = val & ( ( 1 << bits[1] ) - 1 ); +} + +static int stbiw__jpg_processDU( stbi__write_context* s, int* bitBuf, int* bitCnt, float* CDU, float* fdtbl, int DC, const unsigned short HTDC[256][2], const unsigned short HTAC[256][2] ) { + const unsigned short EOB[2] = { HTAC[0x00][0], HTAC[0x00][1] }; + const unsigned short M16zeroes[2] = { HTAC[0xF0][0], HTAC[0xF0][1] }; + int dataOff, i, diff, end0pos; + int DU[64]; + + // DCT rows + for ( dataOff = 0; dataOff < 64; dataOff += 8 ) { + stbiw__jpg_DCT( &CDU[dataOff], &CDU[dataOff + 1], &CDU[dataOff + 2], &CDU[dataOff + 3], &CDU[dataOff + 4], &CDU[dataOff + 5], &CDU[dataOff + 6], &CDU[dataOff + 7] ); + } + // DCT columns + for ( dataOff = 0; dataOff < 8; ++dataOff ) { + stbiw__jpg_DCT( &CDU[dataOff], &CDU[dataOff + 8], &CDU[dataOff + 16], &CDU[dataOff + 24], &CDU[dataOff + 32], &CDU[dataOff + 40], &CDU[dataOff + 48], &CDU[dataOff + 56] ); + } + // Quantize/descale/zigzag the coefficients + for ( i = 0; i < 64; ++i ) { + float v = CDU[i] * fdtbl[i]; + // DU[stbiw__jpg_ZigZag[i]] = (int)(v < 0 ? ceilf(v - 0.5f) : floorf(v + 0.5f)); + // ceilf() and floorf() are C99, not C89, but I /think/ they're not needed here anyway? + DU[stbiw__jpg_ZigZag[i]] = (int)( v < 0 ? v - 0.5f : v + 0.5f ); + } + + // Encode DC + diff = DU[0] - DC; + if ( diff == 0 ) { + stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTDC[0] ); + } + else { + unsigned short bits[2]; + stbiw__jpg_calcBits( diff, bits ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTDC[bits[1]] ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, bits ); + } + // Encode ACs + end0pos = 63; + for ( ; ( end0pos > 0 ) && ( DU[end0pos] == 0 ); --end0pos ) { + } + // end0pos = first element in reverse order !=0 + if ( end0pos == 0 ) { + stbiw__jpg_writeBits( s, bitBuf, bitCnt, EOB ); + return DU[0]; + } + for ( i = 1; i <= end0pos; ++i ) { + int startpos = i; + int nrzeroes; + unsigned short bits[2]; + for ( ; DU[i] == 0 && i <= end0pos; ++i ) { + } + nrzeroes = i - startpos; + if ( nrzeroes >= 16 ) { + int lng = nrzeroes >> 4; + int nrmarker; + for ( nrmarker = 1; nrmarker <= lng; ++nrmarker ) + stbiw__jpg_writeBits( s, bitBuf, bitCnt, M16zeroes ); + nrzeroes &= 15; + } + stbiw__jpg_calcBits( DU[i], bits ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, HTAC[( nrzeroes << 4 ) + bits[1]] ); + stbiw__jpg_writeBits( s, bitBuf, bitCnt, bits ); + } + if ( end0pos != 63 ) { + stbiw__jpg_writeBits( s, bitBuf, bitCnt, EOB ); + } + return DU[0]; +} + +static int stbi_write_jpg_core( stbi__write_context* s, int width, int height, int comp, const void* data, int quality ) { + // Constants that don't pollute global namespace + static const unsigned char std_dc_luminance_nrcodes[] = { 0,0,1,5,1,1,1,1,1,1,0,0,0,0,0,0,0 }; + static const unsigned char std_dc_luminance_values[] = { 0,1,2,3,4,5,6,7,8,9,10,11 }; + static const unsigned char std_ac_luminance_nrcodes[] = { 0,0,2,1,3,3,2,4,3,5,5,4,4,0,0,1,0x7d }; + static const unsigned char std_ac_luminance_values[] = { + 0x01,0x02,0x03,0x00,0x04,0x11,0x05,0x12,0x21,0x31,0x41,0x06,0x13,0x51,0x61,0x07,0x22,0x71,0x14,0x32,0x81,0x91,0xa1,0x08, + 0x23,0x42,0xb1,0xc1,0x15,0x52,0xd1,0xf0,0x24,0x33,0x62,0x72,0x82,0x09,0x0a,0x16,0x17,0x18,0x19,0x1a,0x25,0x26,0x27,0x28, + 0x29,0x2a,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58,0x59, + 0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x83,0x84,0x85,0x86,0x87,0x88,0x89, + 0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4,0xb5,0xb6, + 0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda,0xe1,0xe2, + 0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa + }; + static const unsigned char std_dc_chrominance_nrcodes[] = { 0,0,3,1,1,1,1,1,1,1,1,1,0,0,0,0,0 }; + static const unsigned char std_dc_chrominance_values[] = { 0,1,2,3,4,5,6,7,8,9,10,11 }; + static const unsigned char std_ac_chrominance_nrcodes[] = { 0,0,2,1,2,4,4,3,4,7,5,4,4,0,1,2,0x77 }; + static const unsigned char std_ac_chrominance_values[] = { + 0x00,0x01,0x02,0x03,0x11,0x04,0x05,0x21,0x31,0x06,0x12,0x41,0x51,0x07,0x61,0x71,0x13,0x22,0x32,0x81,0x08,0x14,0x42,0x91, + 0xa1,0xb1,0xc1,0x09,0x23,0x33,0x52,0xf0,0x15,0x62,0x72,0xd1,0x0a,0x16,0x24,0x34,0xe1,0x25,0xf1,0x17,0x18,0x19,0x1a,0x26, + 0x27,0x28,0x29,0x2a,0x35,0x36,0x37,0x38,0x39,0x3a,0x43,0x44,0x45,0x46,0x47,0x48,0x49,0x4a,0x53,0x54,0x55,0x56,0x57,0x58, + 0x59,0x5a,0x63,0x64,0x65,0x66,0x67,0x68,0x69,0x6a,0x73,0x74,0x75,0x76,0x77,0x78,0x79,0x7a,0x82,0x83,0x84,0x85,0x86,0x87, + 0x88,0x89,0x8a,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9a,0xa2,0xa3,0xa4,0xa5,0xa6,0xa7,0xa8,0xa9,0xaa,0xb2,0xb3,0xb4, + 0xb5,0xb6,0xb7,0xb8,0xb9,0xba,0xc2,0xc3,0xc4,0xc5,0xc6,0xc7,0xc8,0xc9,0xca,0xd2,0xd3,0xd4,0xd5,0xd6,0xd7,0xd8,0xd9,0xda, + 0xe2,0xe3,0xe4,0xe5,0xe6,0xe7,0xe8,0xe9,0xea,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7,0xf8,0xf9,0xfa + }; + // Huffman tables + static const unsigned short YDC_HT[256][2] = { {0,2},{2,3},{3,3},{4,3},{5,3},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9} }; + static const unsigned short UVDC_HT[256][2] = { {0,2},{1,2},{2,2},{6,3},{14,4},{30,5},{62,6},{126,7},{254,8},{510,9},{1022,10},{2046,11} }; + static const unsigned short YAC_HT[256][2] = { + {10,4},{0,2},{1,2},{4,3},{11,4},{26,5},{120,7},{248,8},{1014,10},{65410,16},{65411,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {12,4},{27,5},{121,7},{502,9},{2038,11},{65412,16},{65413,16},{65414,16},{65415,16},{65416,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {28,5},{249,8},{1015,10},{4084,12},{65417,16},{65418,16},{65419,16},{65420,16},{65421,16},{65422,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {58,6},{503,9},{4085,12},{65423,16},{65424,16},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {59,6},{1016,10},{65430,16},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {122,7},{2039,11},{65438,16},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {123,7},{4086,12},{65446,16},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {250,8},{4087,12},{65454,16},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {504,9},{32704,15},{65462,16},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {505,9},{65470,16},{65471,16},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {506,9},{65479,16},{65480,16},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1017,10},{65488,16},{65489,16},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1018,10},{65497,16},{65498,16},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2040,11},{65506,16},{65507,16},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {65515,16},{65516,16},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2041,11},{65525,16},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} + }; + static const unsigned short UVAC_HT[256][2] = { + {0,2},{1,2},{4,3},{10,4},{24,5},{25,5},{56,6},{120,7},{500,9},{1014,10},{4084,12},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {11,4},{57,6},{246,8},{501,9},{2038,11},{4085,12},{65416,16},{65417,16},{65418,16},{65419,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {26,5},{247,8},{1015,10},{4086,12},{32706,15},{65420,16},{65421,16},{65422,16},{65423,16},{65424,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {27,5},{248,8},{1016,10},{4087,12},{65425,16},{65426,16},{65427,16},{65428,16},{65429,16},{65430,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {58,6},{502,9},{65431,16},{65432,16},{65433,16},{65434,16},{65435,16},{65436,16},{65437,16},{65438,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {59,6},{1017,10},{65439,16},{65440,16},{65441,16},{65442,16},{65443,16},{65444,16},{65445,16},{65446,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {121,7},{2039,11},{65447,16},{65448,16},{65449,16},{65450,16},{65451,16},{65452,16},{65453,16},{65454,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {122,7},{2040,11},{65455,16},{65456,16},{65457,16},{65458,16},{65459,16},{65460,16},{65461,16},{65462,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {249,8},{65463,16},{65464,16},{65465,16},{65466,16},{65467,16},{65468,16},{65469,16},{65470,16},{65471,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {503,9},{65472,16},{65473,16},{65474,16},{65475,16},{65476,16},{65477,16},{65478,16},{65479,16},{65480,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {504,9},{65481,16},{65482,16},{65483,16},{65484,16},{65485,16},{65486,16},{65487,16},{65488,16},{65489,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {505,9},{65490,16},{65491,16},{65492,16},{65493,16},{65494,16},{65495,16},{65496,16},{65497,16},{65498,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {506,9},{65499,16},{65500,16},{65501,16},{65502,16},{65503,16},{65504,16},{65505,16},{65506,16},{65507,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {2041,11},{65508,16},{65509,16},{65510,16},{65511,16},{65512,16},{65513,16},{65514,16},{65515,16},{65516,16},{0,0},{0,0},{0,0},{0,0},{0,0},{0,0}, + {16352,14},{65517,16},{65518,16},{65519,16},{65520,16},{65521,16},{65522,16},{65523,16},{65524,16},{65525,16},{0,0},{0,0},{0,0},{0,0},{0,0}, + {1018,10},{32707,15},{65526,16},{65527,16},{65528,16},{65529,16},{65530,16},{65531,16},{65532,16},{65533,16},{65534,16},{0,0},{0,0},{0,0},{0,0},{0,0} + }; + static const int YQT[] = { 16,11,10,16,24,40,51,61,12,12,14,19,26,58,60,55,14,13,16,24,40,57,69,56,14,17,22,29,51,87,80,62,18,22, + 37,56,68,109,103,77,24,35,55,64,81,104,113,92,49,64,78,87,103,121,120,101,72,92,95,98,112,100,103,99 }; + static const int UVQT[] = { 17,18,24,47,99,99,99,99,18,21,26,66,99,99,99,99,24,26,56,99,99,99,99,99,47,66,99,99,99,99,99,99, + 99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99,99 }; + static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, + 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f }; + + int row, col, i, k; + float fdtbl_Y[64], fdtbl_UV[64]; + unsigned char YTable[64], UVTable[64]; + + if ( !data || !width || !height || comp > 4 || comp < 1 ) { + return 0; + } + + quality = quality ? quality : 90; + quality = quality < 1 ? 1 : quality > 100 ? 100 : quality; + quality = quality < 50 ? 5000 / quality : 200 - quality * 2; + + for ( i = 0; i < 64; ++i ) { + int uvti, yti = ( YQT[i] * quality + 50 ) / 100; + YTable[stbiw__jpg_ZigZag[i]] = (unsigned char)( yti < 1 ? 1 : yti > 255 ? 255 : yti ); + uvti = ( UVQT[i] * quality + 50 ) / 100; + UVTable[stbiw__jpg_ZigZag[i]] = (unsigned char)( uvti < 1 ? 1 : uvti > 255 ? 255 : uvti ); + } + + for ( row = 0, k = 0; row < 8; ++row ) { + for ( col = 0; col < 8; ++col, ++k ) { + fdtbl_Y[k] = 1 / ( YTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col] ); + fdtbl_UV[k] = 1 / ( UVTable[stbiw__jpg_ZigZag[k]] * aasf[row] * aasf[col] ); + } + } + + // Write Headers + { + static const unsigned char head0[] = { 0xFF,0xD8,0xFF,0xE0,0,0x10,'J','F','I','F',0,1,1,0,0,1,0,1,0,0,0xFF,0xDB,0,0x84,0 }; + static const unsigned char head2[] = { 0xFF,0xDA,0,0xC,3,1,0,2,0x11,3,0x11,0,0x3F,0 }; + const unsigned char head1[] = { 0xFF,0xC0,0,0x11,8,(unsigned char)( height >> 8 ),STBIW_UCHAR( height ),(unsigned char)( width >> 8 ),STBIW_UCHAR( width ), + 3,1,0x11,0,2,0x11,1,3,0x11,1,0xFF,0xC4,0x01,0xA2,0 }; + s->func( s->context, (void*)head0, sizeof( head0 ) ); + s->func( s->context, (void*)YTable, sizeof( YTable ) ); + stbiw__putc( s, 1 ); + s->func( s->context, UVTable, sizeof( UVTable ) ); + s->func( s->context, (void*)head1, sizeof( head1 ) ); + s->func( s->context, (void*)( std_dc_luminance_nrcodes + 1 ), sizeof( std_dc_luminance_nrcodes ) - 1 ); + s->func( s->context, (void*)std_dc_luminance_values, sizeof( std_dc_luminance_values ) ); + stbiw__putc( s, 0x10 ); // HTYACinfo + s->func( s->context, (void*)( std_ac_luminance_nrcodes + 1 ), sizeof( std_ac_luminance_nrcodes ) - 1 ); + s->func( s->context, (void*)std_ac_luminance_values, sizeof( std_ac_luminance_values ) ); + stbiw__putc( s, 1 ); // HTUDCinfo + s->func( s->context, (void*)( std_dc_chrominance_nrcodes + 1 ), sizeof( std_dc_chrominance_nrcodes ) - 1 ); + s->func( s->context, (void*)std_dc_chrominance_values, sizeof( std_dc_chrominance_values ) ); + stbiw__putc( s, 0x11 ); // HTUACinfo + s->func( s->context, (void*)( std_ac_chrominance_nrcodes + 1 ), sizeof( std_ac_chrominance_nrcodes ) - 1 ); + s->func( s->context, (void*)std_ac_chrominance_values, sizeof( std_ac_chrominance_values ) ); + s->func( s->context, (void*)head2, sizeof( head2 ) ); + } + + // Encode 8x8 macroblocks + { + static const unsigned short fillBits[] = { 0x7F, 7 }; + const unsigned char* imageData = (const unsigned char*)data; + int DCY = 0, DCU = 0, DCV = 0; + int bitBuf = 0, bitCnt = 0; + // comp == 2 is grey+alpha (alpha is ignored) + int ofsG = comp > 2 ? 1 : 0, ofsB = comp > 2 ? 2 : 0; + int x, y, pos; + for ( y = 0; y < height; y += 8 ) { + for ( x = 0; x < width; x += 8 ) { + float YDU[64], UDU[64], VDU[64]; + for ( row = y, pos = 0; row < y + 8; ++row ) { + // row >= height => use last input row + int clamped_row = ( row < height ) ? row : height - 1; + int base_p = ( stbi__flip_vertically_on_write ? ( height - 1 - clamped_row ) : clamped_row ) * width * comp; + for ( col = x; col < x + 8; ++col, ++pos ) { + float r, g, b; + // if col >= width => use pixel from last input column + int p = base_p + ( ( col < width ) ? col : ( width - 1 ) ) * comp; + + r = imageData[p + 0]; + g = imageData[p + ofsG]; + b = imageData[p + ofsB]; + YDU[pos] = +0.29900f * r + 0.58700f * g + 0.11400f * b - 128; + UDU[pos] = -0.16874f * r - 0.33126f * g + 0.50000f * b; + VDU[pos] = +0.50000f * r - 0.41869f * g - 0.08131f * b; + } + } + + DCY = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT ); + DCU = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT ); + DCV = stbiw__jpg_processDU( s, &bitBuf, &bitCnt, VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT ); + } + } + + // Do the bit alignment of the EOI marker + stbiw__jpg_writeBits( s, &bitBuf, &bitCnt, fillBits ); + } + + // EOI + stbiw__putc( s, 0xFF ); + stbiw__putc( s, 0xD9 ); + + return 1; +} + +STBIWDEF int stbi_write_jpg_to_func( stbi_write_func* func, void* context, int x, int y, int comp, const void* data, int quality ) +{ + stbi__write_context s; + stbi__start_write_callbacks( &s, func, context ); + return stbi_write_jpg_core( &s, x, y, comp, (void*)data, quality ); +} + + +#ifndef STBI_WRITE_NO_STDIO +STBIWDEF int stbi_write_jpg( char const* filename, int x, int y, int comp, const void* data, int quality ) +{ + stbi__write_context s; + if ( stbi__start_write_file( &s, filename ) ) { + int r = stbi_write_jpg_core( &s, x, y, comp, data, quality ); + stbi__end_write_file( &s ); + return r; + } + else + return 0; +} +#endif + +#endif // STB_IMAGE_WRITE_IMPLEMENTATION + +/* Revision history + 1.11 (2019-08-11) + + 1.10 (2019-02-07) + support utf8 filenames in Windows; fix warnings and platform ifdefs + 1.09 (2018-02-11) + fix typo in zlib quality API, improve STB_I_W_STATIC in C++ + 1.08 (2018-01-29) + add stbi__flip_vertically_on_write, external zlib, zlib quality, choose PNG filter + 1.07 (2017-07-24) + doc fix + 1.06 (2017-07-23) + writing JPEG (using Jon Olick's code) + 1.05 ??? + 1.04 (2017-03-03) + monochrome BMP expansion + 1.03 ??? + 1.02 (2016-04-02) + avoid allocating large structures on the stack + 1.01 (2016-01-16) + STBIW_REALLOC_SIZED: support allocators with no realloc support + avoid race-condition in crc initialization + minor compile issues + 1.00 (2015-09-14) + installable file IO function + 0.99 (2015-09-13) + warning fixes; TGA rle support + 0.98 (2015-04-08) + added STBIW_MALLOC, STBIW_ASSERT etc + 0.97 (2015-01-18) + fixed HDR asserts, rewrote HDR rle logic + 0.96 (2015-01-17) + add HDR output + fix monochrome BMP + 0.95 (2014-08-17) + add monochrome TGA output + 0.94 (2014-05-31) + rename private functions to avoid conflicts with stb_image.h + 0.93 (2014-05-27) + warning fixes + 0.92 (2010-08-01) + casts to unsigned char to fix warnings + 0.91 (2010-07-17) + first public release + 0.90 first internal release +*/ + +/* +------------------------------------------------------------------------------ +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/filereader.cpp b/src/util/filereader.cpp new file mode 100644 index 0000000..f9fc0d4 --- /dev/null +++ b/src/util/filereader.cpp @@ -0,0 +1,16 @@ +#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 new file mode 100644 index 0000000..9b185c7 --- /dev/null +++ b/src/util/filereader.hpp @@ -0,0 +1,12 @@ +#pragma once + +#include + +class FileReader +{ +public: + FileReader(); + + std::string LoadTextFromFile( std::string path ); + +};