[igt-dev] [PATCH i-g-t 2/2] lib/igt_fb: Add support for P01x formats, v5.

[Maarten Lankhorst]

Op 12-02-2019 om 18:11 schreef Maarten Lankhorst:
> The P01x formats are planar 16 bits per component, with the unused lower bits set to 0.
> This means they can all be converted the same way. Only the range is slightly different,
> and this is handled in the color_encoding implementation.
>
> This requires cairo 1.17.2 and pixman 0.36. This works but doesn't give extra precision.
> For more than 8 bits precision a few more patches are required to pixman, pending review:
> https://lists.freedesktop.org/archives/pixman/2019-January/004815.html
> https://lists.freedesktop.org/archives/pixman/2019-January/004809.html
>
> Once those are merged, we will require the next pixman release for better precision.
>
> Changes since v1:
> - Add fallback color definitions when compiling on cairo version < 1.17.2.
> - Skip when FB creation fails on HDR formats, instead of failing.
> Changes since v2:
> - Complain slightly harder when pixman/cairo are out of date.
> - Create a fb with alpha when converting to pixman formats with alpha.
> - Oops, s/pixman_format_code_t/cairo_format_t/
> Changes since v3:
> - Rebase on top of upstream YUV changes.
> Changes since v4:
> - Rebase again.
> - Use drm_fourcc.h from drm-misc-next.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>  #v4


CI is happy, pushed. :)