//
// If you have both RGBA and Y'CbCr output(s), the RGBA output will come
// in the last draw buffer. Also, <format> and <alpha_format> must be
// identical between the two.
void add_ycbcr_output(const ImageFormat &format, OutputAlphaFormat alpha_format,
const YCbCrFormat &ycbcr_format,
//
// If you have both RGBA and Y'CbCr output(s), the RGBA output will come
// in the last draw buffer. Also, <format> and <alpha_format> must be
// identical between the two.
void add_ycbcr_output(const ImageFormat &format, OutputAlphaFormat alpha_format,
const YCbCrFormat &ycbcr_format,