• Adam Jackson's avatar
    glamor: Avoid software fallback for planemasked ZPixmap GetImage · 1ad23068
    Adam Jackson authored
    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.
    Reviewed-by: Eric Anholt's avatarEric Anholt <eric@anholt.net>
    Signed-off-by: Adam Jackson's avatarAdam Jackson <ajax@redhat.com>
glamor_image.c 5.33 KB