- if (image_format.pixel_format == FORMAT_RGB) {
- format = GL_RGB;
- bytes_per_pixel = 3;
- } else if (image_format.pixel_format == FORMAT_RGBA) {
- format = GL_RGBA;
- bytes_per_pixel = 4;
- } else if (image_format.pixel_format == FORMAT_BGR) {
- format = GL_BGR;
- bytes_per_pixel = 3;
- } else if (image_format.pixel_format == FORMAT_BGRA) {
- format = GL_BGRA;
- bytes_per_pixel = 4;
- } else if (image_format.pixel_format == FORMAT_GRAYSCALE) {
- format = GL_LUMINANCE;
- bytes_per_pixel = 1;
- } else {
- assert(false);
- }
-
- // Create PBO to hold the texture holding the input image, and then the texture itself.
- glGenBuffers(1, &pbo);
- check_error();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
- check_error();
- glBufferData(GL_PIXEL_UNPACK_BUFFER_ARB, pitch * height * bytes_per_pixel, NULL, GL_STREAM_DRAW);
- check_error();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
- check_error();
-
- glGenTextures(1, &texture_num);
- check_error();
- glBindTexture(GL_TEXTURE_2D, texture_num);
- check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- check_error();
- glPixelStorei(GL_UNPACK_ROW_LENGTH, pitch);
- check_error();
- // Intel/Mesa seems to have a broken glGenerateMipmap() for non-FBO textures, so do it here
- // instead of calling glGenerateMipmap().
- glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, needs_mipmaps);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, internal_format, width, height, 0, format, GL_UNSIGNED_BYTE, NULL);
- check_error();
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- check_error();
-
- needs_update = false;
- finalized = true;