glsl-fs-raytrace: Use a single readpixels instead of 256*256 probes
commitc9746336856e3253318a09f701a03e0a7881fc55
authorEmma Anholt <emma@anholt.net>
Tue, 2 May 2023 20:38:35 +0000 (2 13:38 -0700)
committerMarge Bot <emma+marge@anholt.net>
Wed, 3 May 2023 22:06:50 +0000 (3 22:06 +0000)
tree1652c3f0acc33f939d986bf3714bf264d72aebc3
parent550d4a2996d4c80e0c0ef976dcde5d5b2322185f
glsl-fs-raytrace: Use a single readpixels instead of 256*256 probes

zink-on-adl runtime goes from 35s to .1s.

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/piglit/-/merge_requests/804>
tests/shaders/glsl-fs-raytrace-bug27060.c