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Fix centroid interpolation weights

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PPSA03792
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nmzik committed 2026-09-15 19:51:30 +04:00
1 parent 9cf7963f44
commit 0d9e95d96a
8 files changed
+128 -16
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterFlow.cpp
+18 -7
View File
@@ -41,7 +41,9 @@ uint32_t EmitBuiltinU32(EmitterState& state, IR::StageInputKind kind, uint32_t c
return EmitAddU32(state, local,
EmitBinaryU32(state, spv::OpIMul, group, ConstantU32(state, size)));
}
const auto variable = InputVariableForKind(state, kind);
const bool centroid = kind == IR::StageInputKind::BaryCoordSmoothCentroid;
const auto variable = InputVariableForKind(
state, centroid ? IR::StageInputKind::BaryCoordSmooth : kind);
if (variable == 0) {
return ConstantU32(state, 0);
}
@@ -74,15 +76,24 @@ uint32_t EmitBuiltinU32(EmitterState& state, IR::StageInputKind kind, uint32_t c
state.builder.AddFunction(spv::OpBitcast, TypeU32(state), bits, value);
return bits;
}
if (kind == IR::StageInputKind::BaryCoordSmooth ||
if (centroid || kind == IR::StageInputKind::BaryCoordSmooth ||
kind == IR::StageInputKind::BaryCoordNoPerspective) {
const auto pointer = state.builder.AllocateId();
const auto value = state.builder.AllocateId();
const auto bits = state.builder.AllocateId();
state.builder.AddFunction(spv::OpAccessChain,
TypePointer(state, spv::StorageClassInput, TypeF32(state)),
pointer, variable, ConstantU32(state, component + 1u));
state.builder.AddFunction(spv::OpLoad, TypeF32(state), value, pointer);
if (centroid) {
const auto coordinates = state.builder.AllocateId();
state.builder.RequireCapability(spv::CapabilityInterpolationFunction);
state.builder.AddFunction(spv::OpExtInst, TypeF32Vector(state, 3), coordinates,
GlslStd450(state), GLSLstd450InterpolateAtCentroid, variable);
state.builder.AddFunction(spv::OpCompositeExtract, TypeF32(state), value,
coordinates, component + 1u);
} else {
const auto pointer = state.builder.AllocateId();
state.builder.AddFunction(spv::OpAccessChain,
TypePointer(state, spv::StorageClassInput, TypeF32(state)),
pointer, variable, ConstantU32(state, component + 1u));
state.builder.AddFunction(spv::OpLoad, TypeF32(state), value, pointer);
}
state.builder.AddFunction(spv::OpBitcast, TypeU32(state), bits, value);
return bits;
}