Method makeRectangularTextureInternal

Source/Graphics/textures.cpp:2240–2326

}

unsigned int Textures::makeRectangularTextureInternal(int width, int height, GLint internal_format, GLint format) {
    CHECK_GL_ERROR();
    unsigned which = AllocateFreeSlot();

    Texture& texture = textures[which];
    texture.Init();
    texture.width = width;
    texture.height = height;
    texture.internal_format = internal_format;
    texture.format = format;
    texture.tex_target = GL_TEXTURE_2D;

    glGenTextures(1, &texture.gl_texture_id);
    LOG_ASSERT(texture.gl_texture_id != INVALID_ID);
    LOG_ASSERT(texture.gl_texture_id != UNLOADED_ID);

    CHECK_GL_ERROR();
    glBindTexture(texture.tex_target, texture.gl_texture_id);
    CHECK_GL_ERROR();
    unsigned int totalTextureSize = 0;
    if (internal_format == GL_RGBA16F || internal_format == GL_RGBA32F || internal_format == GL_DEPTH_COMPONENT || internal_format == GL_DEPTH_COMPONENT24) {
        if (Graphics::Instance()->features().HDR_enable()) {
            glTexImage2D(texture.tex_target, 0, internal_format, width, height, 0,
                         format, GL_UNSIGNED_BYTE, NULL);
            totalTextureSize += width * height * 8;
            int level = 0;
            while (width > 1 || height > 1) {
                width = max(1, width / 2);
                height = max(1, height / 2);
                ++level;
                glTexImage2D(texture.tex_target, level, internal_format, width, height, 0,
                             format, GL_UNSIGNED_BYTE, NULL);
                totalTextureSize += width * height * 8;
            }
            CHECK_GL_ERROR();
        } else {
            glTexImage2D(texture.tex_target, 0, GL_RGBA, width, height, 0,
                         format, GL_UNSIGNED_BYTE, NULL);
            totalTextureSize += width * height * 4;
            int level = 0;
            while (width > 1 || height > 1) {
                width = max(1, width / 2);
                height = max(1, height / 2);
                ++level;
                glTexImage2D(texture.tex_target, level, GL_RGBA, width, height, 0,
                             format, GL_UNSIGNED_BYTE, NULL);
                totalTextureSize += width * height * 4;
            }
            CHECK_GL_ERROR();
        }
    } else {
        glTexImage2D(texture.tex_target, 0, internal_format, width, height, 0,
                     format, GL_UNSIGNED_BYTE, NULL);
        totalTextureSize += width * height * 4;
        int level = 0;
        while (width > 1 || height > 1) {
            width = max(1, width / 2);
            height = max(1, height / 2);