tree 2b06748cfe443c746120c5e3ecd8ff661d559dd8
parent 84bd361217d1a1ab6610368df60ad23b3cd7d94e
author Samuel Pitoiset <samuel.pitoiset@gmail.com> 1559831461 +0200
committer Juan A. Suarez Romero <jasuarez@igalia.com> 1560239886 +0000

radv: fix alpha-to-coverage when there is unused color attachments

When alphaToCoverage is enabled, we should always write the alpha
channel of MRT0 if it's unused. This now matches RadeonSI.

This fixes the new CTS:
dEQP-VK.pipeline.multisample.alpha_to_coverage_unused_attachment.samples_*.alpha_invisible

Cc: 19.0 19.1 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-By: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl
(cherry picked from commit 91aa25f4625014ddf194578fc1c1d0a505e5f8db)