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gpu: fix zero-source alpha blending on swizzled targets

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Co-authored-by: Çağatay Güçlü <33038942+defektu@users.noreply.github.com>
This commit is contained in:
nmzik
2026-10-04 23:22:54 +04:00
parent 8274e517b2
commit 94e7d239dd
7 changed files with 35 additions and 10 deletions
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tests/shaderCfgTests.cpp
+9 -2
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@@ -12906,6 +12906,9 @@ void TestBlendMappingClassification() {
static_cast<uint8_t>(Factor::kOneMinusSrcAlpha);
Check(classify(Prospero::ColorMappingAbgr) == Support::SourceAlphaOne,
"separate alpha accumulation did not preserve its unit source factor");
blend.alpha_srcblend = static_cast<uint8_t>(Factor::kZero);
Check(classify(Prospero::ColorMappingAbgr) == Support::SourceAlphaZero,
"separate alpha attenuation did not preserve its zero source factor");
blend.alpha_srcblend = blend.color_srcblend;
Check(classify(Prospero::ColorMappingAbgr) == Support::SourceAlpha,
"equal separate alpha equations did not reuse the broadcast alpha mode");
@@ -12916,7 +12919,7 @@ void TestBlendMappingClassification() {
switch (changed) {
case 0: blend.color_srcblend = static_cast<uint8_t>(Factor::kZero); break;
case 1: blend.color_destblend = static_cast<uint8_t>(Factor::kOne); break;
case 2: blend.alpha_srcblend = static_cast<uint8_t>(Factor::kZero); break;
case 2: blend.alpha_srcblend = static_cast<uint8_t>(Factor::kDstAlpha); break;
case 3: blend.alpha_destblend = static_cast<uint8_t>(Factor::kOne); break;
case 4: blend.color_comb_fcn = static_cast<uint8_t>(Prospero::BlendOp::kSubtract); break;
case 5: blend.alpha_comb_fcn = static_cast<uint8_t>(Prospero::BlendOp::kSubtract); break;
@@ -12937,9 +12940,13 @@ void TestLogicalAlphaBlendExport() {
const auto remapped_key = MakeStageStaticKey(pixel);
pixel.alpha_blend_source = ShaderAlphaBlendSource::SourceAlphaOne;
const auto separate_key = MakeStageStaticKey(pixel);
pixel.alpha_blend_source = ShaderAlphaBlendSource::SourceAlphaZero;
const auto zero_key = MakeStageStaticKey(pixel);
Check(ordinary_key != guest_key && guest_key != remapped_key &&
ordinary_key != remapped_key && separate_key != ordinary_key &&
separate_key != guest_key && separate_key != remapped_key,
separate_key != guest_key && separate_key != remapped_key &&
zero_key != ordinary_key && zero_key != guest_key &&
zero_key != remapped_key && zero_key != separate_key,
"ordinary, guest dual-source, and logical-alpha modes share a cache key");
auto options = MakeCompileOptions(ShaderType::Pixel);