9a2f1be814
This is potentially nicer for some drivers. AMD drivers will use it. mesa_frag_result_get_color_index will be used often. Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com> Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38604>