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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 91aa25f462)
tags/mesa-19.1.0
Samuel Pitoiset
6 years ago
1 changed files with 1 additions and 1 deletions
+ 1
- 1
src/amd/vulkan/radv_pipeline.c
View File
| @@ -524,7 +524,7 @@ radv_pipeline_compute_spi_color_formats(struct radv_pipeline *pipeline, | |||
| col_format |= cf << (4 * i); | |||
| } | |||
| if (!col_format && blend->need_src_alpha & (1 << 0)) { | |||
| if (!(col_format & 0xf) && blend->need_src_alpha & (1 << 0)) { | |||
| /* When a subpass doesn't have any color attachments, write the | |||
| * alpha channel of MRT0 when alpha coverage is enabled because | |||
| * the depth attachment needs it. | |||
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