Connor Abbott
22a061fb91
nir: Use better calculation for alpha-to-coverage mask
...
The old calculation depended on the sample count, and gave subpar
results for 8x MSAA with standard sample locations. The new calculation
is based on the Intel pass, with some changing of the constants so that
the sample count is always proportional to alpha for 2xMSAA and 4xMSAA
and the addition of rotating the sample mask based on the pixel.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39335 >
2026-03-20 18:09:48 +00:00
Simon Perretta
2a7ebf2ae0
nir/lower_alpha: extend to support dynamic a2c
...
Signed-off-by: Simon Perretta <simon.perretta@imgtec.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37512 >
2025-09-30 12:15:53 +00:00
Ella Stanforth
5ab606ccda
nir: assert when we do not have a sample count when not using intrinsic
...
Signed-off-by: Ella Stanforth <ella@igalia.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36412 >
2025-09-16 18:26:42 +00:00
Ella Stanforth
b38c4e8982
nir/alpha_to_coverage: Add an intrinsic for better dithering
...
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33942 >
2025-04-23 09:03:41 +00:00
Ella Stanforth
d3aedbfe9d
asahi/lib: Move alpha_to_one and alpha_to_coverage lowering to common code.
...
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33942 >
2025-04-23 09:03:41 +00:00
