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Preserve vertex export locations for mixed pixel interpolation

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This commit is contained in:
nmzik
2026-10-08 20:05:32 +04:00
parent b65dc12208
commit b38b7454a6
7 changed files with 100 additions and 10 deletions
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src/graphics/shader/recompiler/ir/passes/ShaderInfoCollection.cpp
+8 -6
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@@ -227,15 +227,16 @@ void CollectPixelInputs(const Program& program, const ShaderPixelInputInfo* pixe
}
}
}
// Aliases of a vertex output share one SPIR-V interface variable. If any
// alias reads raw vertices, interpolate the other aliases from those too.
// Mixed interpolation modes share raw vertices at their guest export slot.
// Rectangle expansion alone supplies separate flat and smooth outputs.
for (uint32_t input = 0; input < pixel->input_num; input++) {
for (uint32_t alias = 0; alias < pixel->input_num; alias++) {
const bool same_mode = ShaderPixelParameterIsFlat(*pixel, input) ==
ShaderPixelParameterIsFlat(*pixel, alias);
if (ShaderPixelParameterMappedLocation(*pixel, input) ==
ShaderPixelParameterMappedLocation(*pixel, alias) &&
ShaderPixelParameterIsFlat(*pixel, input) ==
ShaderPixelParameterIsFlat(*pixel, alias)) {
per_vertex[input] = per_vertex[input] || per_vertex[alias];
(pixel->parameter_mode != ShaderPixelParameterMode::Rectangle || same_mode)) {
per_vertex[input] = per_vertex[input] || per_vertex[alias] || !same_mode;
}
}
}
@@ -244,7 +245,8 @@ void CollectPixelInputs(const Program& program, const ShaderPixelInputInfo* pixe
per_vertex[input]);
}
for (uint32_t input = 0; input < pixel->input_num; input++) {
if (interpolated[input] && per_vertex[input]) {
if (interpolated[input] && per_vertex[input] &&
!ShaderPixelParameterIsFlat(*pixel, input)) {
const auto kind = pixel->ps_no_perspective ? StageInputKind::BaryCoordNoPerspective
: StageInputKind::BaryCoordSmooth;
AddInput(info, kind, 0, 3,