Files
crumpet-engine/OpenGL/texture.cpp

49 lines
1.3 KiB
C++

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#define STB_IMAGE_IMPLEMENTATION
#include "stb_image.h"
#include "texture.h"
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#include "texture.h"
#include "stb_image.h"
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#include <cassert>
#include <iostream>
Texture::Texture(std::string fileName) {
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stbi_set_flip_vertically_on_load(true);
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int width, height, numComponents;
unsigned char* imageData = stbi_load(fileName.c_str(), &width, &height, &numComponents, 4);
if (imageData == NULL)
std::cout << "Loading failed for texture: " << fileName << std::endl;
glGenTextures(1, &m_texture);
glBindTexture(GL_TEXTURE_2D, m_texture);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, imageData);
stbi_image_free(imageData);
std::cout << "Loaded texture: " << fileName << std::endl;
}
void Texture::Bind(unsigned int unit) {
assert(unit >= 0 && unit <= 31);
glActiveTexture(GL_TEXTURE0 + unit);
glBindTexture(GL_TEXTURE_2D, m_texture);
}
Texture::~Texture() {
glDeleteTextures(1, &m_texture);
}