Patch "Remove the 8e extra safety margin in COVER_CLIP analysis" reduced
the required image area for setting the COVER flags in
pixman.c:analyze_extent(). Do the same reduction in affine-bench.
Leaving the old calculations in place would be very confusing for anyone
reading the code.
Also add a comment that explains how affine-bench wants to hit the COVER
paths. This explains why the intricate extent calculations are copied
from pixman.c.
[Pekka: split patch, change comments, write commit message]
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Ben Avison <bavison@riscosopen.org>
Affine-bench is written by following the example of lowlevel-blt-bench.
Affine-bench differs from lowlevel-blt-bench in the following:
- does not test different sized operations fitting to specific caches,
destination is always 1920x1080
- allows defining the affine transformation parameters
- carefully computes operation extents to hit the COVER_CLIP fast paths
Original version by Ben Avison. Changes by Pekka in v3:
- commit message
- style fixes
- more comments
- refactoring (e.g. bench_info_t)
- help output tweak
Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-by: Ben Avison <bavison@riscosopen.org>
