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spirv: Fix alpha test

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FernandoS27 2021-04-14 08:00:41 +02:00 committed by ameerj
parent 6f4a1c8dcf
commit ab3831f6cb
1 changed files with 5 additions and 0 deletions
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5
src/shader_recompiler/backend/spirv/emit_spirv_special.cpp
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@ -65,6 +65,10 @@ void AlphaTest(EmitContext& ctx) {
if (comparison == CompareFunction::Always) {
return;
}
if (!Sirit::ValidId(ctx.frag_color[0])) {
return;
}
const Id type{ctx.F32[1]};
const Id rt0_color{ctx.OpLoad(ctx.F32[4], ctx.frag_color[0])};
const Id alpha{ctx.OpCompositeExtract(type, rt0_color, 3u)};
@ -74,6 +78,7 @@ void AlphaTest(EmitContext& ctx) {
const Id alpha_reference{ctx.Constant(ctx.F32[1], ctx.profile.alpha_test_reference)};
const Id condition{ComparisonFunction(ctx, comparison, alpha, alpha_reference)};
ctx.OpSelectionMerge(true_label, spv::SelectionControlMask::MaskNone);
ctx.OpBranchConditional(condition, true_label, discard_label);
ctx.AddLabel(discard_label);
ctx.OpKill();