[PATCH xserver 2/2] glamor: Avoid software fallback for planemasked ZPixmap GetImage

[Adam Jackson]

On Wed, 2016-09-28 at 13:05 -0400, Adam Jackson wrote:
> Same trick as in fb: just do a normal GetImage and deal with the
> planemask on the CPU if you have to. Since the software fallback hit for
> glamor is pretty brutal, this is a much more impressive win for glamor
> than it was for fb:
> 
>   11100.0  87700.0 (7.901) (copy 0xaaaaaaaa) ShmGetImage 10x10 square
>    9840.0  47800.0 (4.858) (copy 0xaaaaaaaa) ShmGetImage 100x100 square
>    1550.0   4240.0 (2.735) (copy 0xaaaaaaaa) ShmGetImage 500x500 square
>    9450.0  78900.0 (8.349) (0xaaaaaaaa) GetImage 10x10 square
>    6910.0  30900.0 (4.472) (0xaaaaaaaa) GetImage 100x100 square
>     431.0   2020.0 (4.687) (0xaaaaaaaa) GetImage 500x500 square
> 
> Measured with Xephyr -glamor on Skylake GT3e.

The objection to this series was that they got 24bpp wrong. Since
that's no longer a problem, anyone care to review these?

- ajax