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SPV: Fix an issue of interpolation decoration.

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GLSL interpolation qualifiers and auxiliary storage qualifiers are not
mutually exclusive. So when they are translated to SPIR-V decorations, two
independent utility methods should be employed to do this job.
This commit is contained in:
Rex Xu 2016-05-21 09:40:44 +08:00
parent 2921e0c54a
commit bbceed7be3
2 changed files with 20 additions and 8 deletions
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26
SPIRV/GlslangToSpv.cpp
View File

@ -108,7 +108,7 @@ public:
void dumpSpv(std::vector<unsigned int>& out);
protected:
spv::Decoration TranslateInterpolationDecoration(const glslang::TQualifier& qualifier);
spv::Decoration TranslateAuxiliaryStorageDecoration(const glslang::TQualifier& qualifier);
spv::BuiltIn TranslateBuiltInDecoration(glslang::TBuiltInVariable, bool member);
spv::ImageFormat TranslateImageFormat(const glslang::TType& type);
spv::Id createSpvVariable(const glslang::TIntermSymbol*);
@ -354,18 +354,26 @@ spv::Decoration TranslateLayoutDecoration(const glslang::TType& type, glslang::T
// Translate glslang type to SPIR-V interpolation decorations.
// Returns spv::Decoration(spv::BadValue) when no decoration
// should be applied.
spv::Decoration TGlslangToSpvTraverser::TranslateInterpolationDecoration(const glslang::TQualifier& qualifier)
spv::Decoration TranslateInterpolationDecoration(const glslang::TQualifier& qualifier)
{
if (qualifier.smooth) {
if (qualifier.smooth)
// Smooth decoration doesn't exist in SPIR-V 1.0
return (spv::Decoration)spv::BadValue;
}
if (qualifier.nopersp)
else if (qualifier.nopersp)
return spv::DecorationNoPerspective;
else if (qualifier.patch)
return spv::DecorationPatch;
else if (qualifier.flat)
return spv::DecorationFlat;
else
return (spv::Decoration)spv::BadValue;
}
// Translate glslang type to SPIR-V auxiliary storage decorations.
// Returns spv::Decoration(spv::BadValue) when no decoration
// should be applied.
spv::Decoration TGlslangToSpvTraverser::TranslateAuxiliaryStorageDecoration(const glslang::TQualifier& qualifier)
{
if (qualifier.patch)
return spv::DecorationPatch;
else if (qualifier.centroid)
return spv::DecorationCentroid;
else if (qualifier.sample) {
@ -1890,9 +1898,10 @@ spv::Id TGlslangToSpvTraverser::convertGlslangToSpvType(const glslang::TType& ty
builder.addMemberName(spvType, member, glslangType.getFieldName().c_str());
addMemberDecoration(spvType, member, TranslateLayoutDecoration(glslangType, subQualifier.layoutMatrix));
addMemberDecoration(spvType, member, TranslatePrecisionDecoration(glslangType));
// Add interpolation decorations only to top-level members of Input and Output storage classes
// Add interpolation and auxiliary storage decorations only to top-level members of Input and Output storage classes
if (type.getQualifier().storage == glslang::EvqVaryingIn || type.getQualifier().storage == glslang::EvqVaryingOut) {
addMemberDecoration(spvType, member, TranslateInterpolationDecoration(subQualifier));
addMemberDecoration(spvType, member, TranslateAuxiliaryStorageDecoration(subQualifier));
}
addMemberDecoration(spvType, member, TranslateInvariantDecoration(subQualifier));
@ -3917,6 +3926,7 @@ spv::Id TGlslangToSpvTraverser::getSymbolId(const glslang::TIntermSymbol* symbol
if (! symbol->getType().isStruct()) {
addDecoration(id, TranslatePrecisionDecoration(symbol->getType()));
addDecoration(id, TranslateInterpolationDecoration(symbol->getType().getQualifier()));
addDecoration(id, TranslateAuxiliaryStorageDecoration(symbol->getType().getQualifier()));
if (symbol->getType().getQualifier().hasSpecConstantId())
addDecoration(id, spv::DecorationSpecId, symbol->getType().getQualifier().layoutSpecConstantId);
if (symbol->getQualifier().hasIndex())

2
Test/baseResults/spv.qualifiers.vert.out
View File

@ -21,9 +21,11 @@ Linked vertex stage:
Name 15 "outVf"
Name 17 "outVn"
Name 19 "outVcn"
Decorate 9(outVc) Centroid
Decorate 15(outVf) Flat
Decorate 17(outVn) NoPerspective
Decorate 19(outVcn) NoPerspective
Decorate 19(outVcn) Centroid
2: TypeVoid
3: TypeFunction 2
6: TypeFloat 32