ExportTexture.cpp

#include "ExportTexture.h"
 
#include <glad/glad.h>
#include <stb/stb_image_write.h>
 
void ExportTexture(int fbo, std::string path, int w, int h)
{
    if (path.size() < 3)
    {
        return;
    }
 
    if (path.find(".png") == std::string::npos)
    {
        path += ".png";
    }
 
    unsigned char *data = new unsigned char[w * h * 3];
    glReadBuffer(GL_COLOR_ATTACHMENT0);
    glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    glReadPixels(0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, data);
    glBindFramebuffer(GL_FRAMEBUFFER, 0);
    stbi_flip_vertically_on_write(true);
    stbi_write_png(path.c_str(), w, h, 3, data, w * 3);
    delete[] data;
}