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radeonsi: fix alpha-to-coverage if color writes are disabled

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If alpha-to-coverage is enabled, we have to compute alpha
even if color writes are disabled.

Signed-off-by: Józef Kucia <joseph.kucia@gmail.com>
Signed-off-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Józef Kucia 2017-12-31 10:19:15 +01:00 • committed by Marek Olšák
parent 79724c89f8
commit f222cf3c6d
1 changed files with 3 additions and 0 deletions
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3
src/gallium/drivers/radeonsi/si_state_shaders.c
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@ -1168,10 +1168,13 @@ static void si_shader_selector_key_hw_vs(struct si_context *sctx,
/* Find out if PS is disabled. */
bool ps_disabled = true;
if (ps) {
const struct si_state_blend *blend = sctx->queued.named.blend;
bool alpha_to_coverage = blend && blend->alpha_to_coverage;
bool ps_modifies_zs = ps->info.uses_kill ||
ps->info.writes_z ||
ps->info.writes_stencil ||
ps->info.writes_samplemask ||
alpha_to_coverage ||
si_get_alpha_test_func(sctx) != PIPE_FUNC_ALWAYS;
unsigned ps_colormask = sctx->framebuffer.colorbuf_enabled_4bit &