diff options
Diffstat (limited to 'src/3rdparty/angle/src/compiler/translator/QualifierTypes.cpp')
| -rw-r--r-- | src/3rdparty/angle/src/compiler/translator/QualifierTypes.cpp | 784 |
1 files changed, 784 insertions, 0 deletions
diff --git a/src/3rdparty/angle/src/compiler/translator/QualifierTypes.cpp b/src/3rdparty/angle/src/compiler/translator/QualifierTypes.cpp new file mode 100644 index 0000000000..f748175957 --- /dev/null +++ b/src/3rdparty/angle/src/compiler/translator/QualifierTypes.cpp @@ -0,0 +1,784 @@ +// +// Copyright (c) 2002-2016 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// + +#include "compiler/translator/QualifierTypes.h" + +#include "compiler/translator/Diagnostics.h" + +#include <algorithm> + +namespace sh +{ + +namespace +{ + +// GLSL ES 3.10 does not impose a strict order on type qualifiers and allows multiple layout +// declarations. +// GLSL ES 3.10 Revision 4, 4.10 Order of Qualification +bool AreTypeQualifierChecksRelaxed(int shaderVersion) +{ + return shaderVersion >= 310; +} + +bool IsScopeQualifier(TQualifier qualifier) +{ + return qualifier == EvqGlobal || qualifier == EvqTemporary; +} + +bool IsScopeQualifierWrapper(const TQualifierWrapperBase *qualifier) +{ + if (qualifier->getType() != QtStorage) + return false; + const TStorageQualifierWrapper *storageQualifier = + static_cast<const TStorageQualifierWrapper *>(qualifier); + TQualifier q = storageQualifier->getQualifier(); + return IsScopeQualifier(q); +} + +// Returns true if the invariant for the qualifier sequence holds +bool IsInvariantCorrect(const TTypeQualifierBuilder::QualifierSequence &qualifiers) +{ + // We should have at least one qualifier. + // The first qualifier always tells the scope. + return qualifiers.size() >= 1 && IsScopeQualifierWrapper(qualifiers[0]); +} + +// Returns true if there are qualifiers which have been specified multiple times +// If areQualifierChecksRelaxed is set to true, then layout qualifier repetition is allowed. +bool HasRepeatingQualifiers(const TTypeQualifierBuilder::QualifierSequence &qualifiers, + bool areQualifierChecksRelaxed, + std::string *errorMessage) +{ + bool invariantFound = false; + bool precisionFound = false; + bool layoutFound = false; + bool interpolationFound = false; + + unsigned int locationsSpecified = 0; + bool isOut = false; + + // The iteration starts from one since the first qualifier only reveals the scope of the + // expression. It is inserted first whenever the sequence gets created. + for (size_t i = 1; i < qualifiers.size(); ++i) + { + switch (qualifiers[i]->getType()) + { + case QtInvariant: + { + if (invariantFound) + { + *errorMessage = "The invariant qualifier specified multiple times."; + return true; + } + invariantFound = true; + break; + } + case QtPrecision: + { + if (precisionFound) + { + *errorMessage = "The precision qualifier specified multiple times."; + return true; + } + precisionFound = true; + break; + } + case QtLayout: + { + if (layoutFound && !areQualifierChecksRelaxed) + { + *errorMessage = "The layout qualifier specified multiple times."; + return true; + } + if (invariantFound && !areQualifierChecksRelaxed) + { + // This combination is not correct according to the syntax specified in the + // formal grammar in the ESSL 3.00 spec. In ESSL 3.10 the grammar does not have + // a similar restriction. + *errorMessage = + "The layout qualifier and invariant qualifier cannot coexist in the same " + "declaration according to the grammar."; + return true; + } + layoutFound = true; + const TLayoutQualifier ¤tQualifier = + static_cast<const TLayoutQualifierWrapper *>(qualifiers[i])->getQualifier(); + locationsSpecified += currentQualifier.locationsSpecified; + break; + } + case QtInterpolation: + { + // 'centroid' is treated as a storage qualifier + // 'flat centroid' will be squashed to 'flat' + // 'smooth centroid' will be squashed to 'centroid' + if (interpolationFound) + { + *errorMessage = "The interpolation qualifier specified multiple times."; + return true; + } + interpolationFound = true; + break; + } + case QtStorage: + { + // Go over all of the storage qualifiers up until the current one and check for + // repetitions. + TQualifier currentQualifier = + static_cast<const TStorageQualifierWrapper *>(qualifiers[i])->getQualifier(); + if (currentQualifier == EvqVertexOut || currentQualifier == EvqFragmentOut) + { + isOut = true; + } + for (size_t j = 1; j < i; ++j) + { + if (qualifiers[j]->getType() == QtStorage) + { + const TStorageQualifierWrapper *previousQualifierWrapper = + static_cast<const TStorageQualifierWrapper *>(qualifiers[j]); + TQualifier previousQualifier = previousQualifierWrapper->getQualifier(); + if (currentQualifier == previousQualifier) + { + *errorMessage = previousQualifierWrapper->getQualifierString().c_str(); + *errorMessage += " specified multiple times"; + return true; + } + } + } + break; + } + case QtMemory: + { + // Go over all of the memory qualifiers up until the current one and check for + // repetitions. + // Having both readonly and writeonly in a sequence is valid. + // GLSL ES 3.10 Revision 4, 4.9 Memory Access Qualifiers + TQualifier currentQualifier = + static_cast<const TMemoryQualifierWrapper *>(qualifiers[i])->getQualifier(); + for (size_t j = 1; j < i; ++j) + { + if (qualifiers[j]->getType() == QtMemory) + { + const TMemoryQualifierWrapper *previousQualifierWrapper = + static_cast<const TMemoryQualifierWrapper *>(qualifiers[j]); + TQualifier previousQualifier = previousQualifierWrapper->getQualifier(); + if (currentQualifier == previousQualifier) + { + *errorMessage = previousQualifierWrapper->getQualifierString().c_str(); + *errorMessage += " specified multiple times"; + return true; + } + } + } + break; + } + default: + UNREACHABLE(); + } + } + + if (locationsSpecified > 1 && isOut) + { + // GLSL ES 3.00.6 section 4.3.8.2 Output Layout Qualifiers + // GLSL ES 3.10 section 4.4.2 Output Layout Qualifiers + // "The qualifier may appear at most once within a declaration." + *errorMessage = "Output layout location specified multiple times."; + return true; + } + + return false; +} + +// GLSL ES 3.00_6, 4.7 Order of Qualification +// The correct order of qualifiers is: +// invariant-qualifier interpolation-qualifier storage-qualifier precision-qualifier +// layout-qualifier has to be before storage-qualifier. +bool AreQualifiersInOrder(const TTypeQualifierBuilder::QualifierSequence &qualifiers, + std::string *errorMessage) +{ + bool foundInterpolation = false; + bool foundStorage = false; + bool foundPrecision = false; + for (size_t i = 1; i < qualifiers.size(); ++i) + { + switch (qualifiers[i]->getType()) + { + case QtInvariant: + if (foundInterpolation || foundStorage || foundPrecision) + { + *errorMessage = "The invariant qualifier has to be first in the expression."; + return false; + } + break; + case QtInterpolation: + if (foundStorage) + { + *errorMessage = "Storage qualifiers have to be after interpolation qualifiers."; + return false; + } + else if (foundPrecision) + { + *errorMessage = + "Precision qualifiers have to be after interpolation qualifiers."; + return false; + } + foundInterpolation = true; + break; + case QtLayout: + if (foundStorage) + { + *errorMessage = "Storage qualifiers have to be after layout qualifiers."; + return false; + } + else if (foundPrecision) + { + *errorMessage = "Precision qualifiers have to be after layout qualifiers."; + return false; + } + break; + case QtStorage: + if (foundPrecision) + { + *errorMessage = "Precision qualifiers have to be after storage qualifiers."; + return false; + } + foundStorage = true; + break; + case QtMemory: + if (foundPrecision) + { + *errorMessage = "Precision qualifiers have to be after memory qualifiers."; + return false; + } + break; + case QtPrecision: + foundPrecision = true; + break; + default: + UNREACHABLE(); + } + } + return true; +} + +struct QualifierComparator +{ + bool operator()(const TQualifierWrapperBase *q1, const TQualifierWrapperBase *q2) + { + return q1->getRank() < q2->getRank(); + } +}; + +void SortSequence(TTypeQualifierBuilder::QualifierSequence &qualifiers) +{ + // We need a stable sorting algorithm since the order of layout-qualifier declarations matter. + // The sorting starts from index 1, instead of 0, since the element at index 0 tells the scope + // and we always want it to be first. + std::stable_sort(qualifiers.begin() + 1, qualifiers.end(), QualifierComparator()); +} + +// Handles the joining of storage qualifiers for variables. +bool JoinVariableStorageQualifier(TQualifier *joinedQualifier, TQualifier storageQualifier) +{ + switch (*joinedQualifier) + { + case EvqGlobal: + *joinedQualifier = storageQualifier; + break; + case EvqTemporary: + { + switch (storageQualifier) + { + case EvqConst: + *joinedQualifier = storageQualifier; + break; + default: + return false; + } + break; + } + case EvqSmooth: + { + switch (storageQualifier) + { + case EvqCentroid: + *joinedQualifier = EvqCentroid; + break; + case EvqVertexOut: + case EvqGeometryOut: + *joinedQualifier = EvqSmoothOut; + break; + case EvqFragmentIn: + case EvqGeometryIn: + *joinedQualifier = EvqSmoothIn; + break; + default: + return false; + } + break; + } + case EvqFlat: + { + switch (storageQualifier) + { + case EvqCentroid: + *joinedQualifier = EvqFlat; + break; + case EvqVertexOut: + case EvqGeometryOut: + *joinedQualifier = EvqFlatOut; + break; + case EvqFragmentIn: + case EvqGeometryIn: + *joinedQualifier = EvqFlatIn; + break; + default: + return false; + } + break; + } + case EvqCentroid: + { + switch (storageQualifier) + { + case EvqVertexOut: + case EvqGeometryOut: + *joinedQualifier = EvqCentroidOut; + break; + case EvqFragmentIn: + case EvqGeometryIn: + *joinedQualifier = EvqCentroidIn; + break; + default: + return false; + } + break; + } + default: + return false; + } + return true; +} + +// Handles the joining of storage qualifiers for a parameter in a function. +bool JoinParameterStorageQualifier(TQualifier *joinedQualifier, TQualifier storageQualifier) +{ + switch (*joinedQualifier) + { + case EvqTemporary: + *joinedQualifier = storageQualifier; + break; + case EvqConst: + { + switch (storageQualifier) + { + case EvqIn: + *joinedQualifier = EvqConstReadOnly; + break; + default: + return false; + } + break; + } + default: + return false; + } + return true; +} + +bool JoinMemoryQualifier(TMemoryQualifier *joinedMemoryQualifier, TQualifier memoryQualifier) +{ + switch (memoryQualifier) + { + case EvqReadOnly: + joinedMemoryQualifier->readonly = true; + break; + case EvqWriteOnly: + joinedMemoryQualifier->writeonly = true; + break; + case EvqCoherent: + joinedMemoryQualifier->coherent = true; + break; + case EvqRestrict: + joinedMemoryQualifier->restrictQualifier = true; + break; + case EvqVolatile: + // Variables having the volatile qualifier are automatcally treated as coherent as well. + // GLSL ES 3.10, Revision 4, 4.9 Memory Access Qualifiers + joinedMemoryQualifier->volatileQualifier = true; + joinedMemoryQualifier->coherent = true; + break; + default: + UNREACHABLE(); + } + return true; +} + +TTypeQualifier GetVariableTypeQualifierFromSortedSequence( + const TTypeQualifierBuilder::QualifierSequence &sortedSequence, + TDiagnostics *diagnostics) +{ + TTypeQualifier typeQualifier( + static_cast<const TStorageQualifierWrapper *>(sortedSequence[0])->getQualifier(), + sortedSequence[0]->getLine()); + for (size_t i = 1; i < sortedSequence.size(); ++i) + { + const TQualifierWrapperBase *qualifier = sortedSequence[i]; + bool isQualifierValid = false; + switch (qualifier->getType()) + { + case QtInvariant: + isQualifierValid = true; + typeQualifier.invariant = true; + break; + case QtInterpolation: + { + switch (typeQualifier.qualifier) + { + case EvqGlobal: + isQualifierValid = true; + typeQualifier.qualifier = + static_cast<const TInterpolationQualifierWrapper *>(qualifier) + ->getQualifier(); + break; + default: + isQualifierValid = false; + } + break; + } + case QtLayout: + { + const TLayoutQualifierWrapper *layoutQualifierWrapper = + static_cast<const TLayoutQualifierWrapper *>(qualifier); + isQualifierValid = true; + typeQualifier.layoutQualifier = sh::JoinLayoutQualifiers( + typeQualifier.layoutQualifier, layoutQualifierWrapper->getQualifier(), + layoutQualifierWrapper->getLine(), diagnostics); + break; + } + case QtStorage: + isQualifierValid = JoinVariableStorageQualifier( + &typeQualifier.qualifier, + static_cast<const TStorageQualifierWrapper *>(qualifier)->getQualifier()); + break; + case QtPrecision: + isQualifierValid = true; + typeQualifier.precision = + static_cast<const TPrecisionQualifierWrapper *>(qualifier)->getQualifier(); + ASSERT(typeQualifier.precision != EbpUndefined); + break; + case QtMemory: + isQualifierValid = JoinMemoryQualifier( + &typeQualifier.memoryQualifier, + static_cast<const TMemoryQualifierWrapper *>(qualifier)->getQualifier()); + break; + default: + UNREACHABLE(); + } + if (!isQualifierValid) + { + const TString &qualifierString = qualifier->getQualifierString(); + diagnostics->error(qualifier->getLine(), "invalid qualifier combination", + qualifierString.c_str()); + break; + } + } + return typeQualifier; +} + +TTypeQualifier GetParameterTypeQualifierFromSortedSequence( + const TTypeQualifierBuilder::QualifierSequence &sortedSequence, + TDiagnostics *diagnostics) +{ + TTypeQualifier typeQualifier(EvqTemporary, sortedSequence[0]->getLine()); + for (size_t i = 1; i < sortedSequence.size(); ++i) + { + const TQualifierWrapperBase *qualifier = sortedSequence[i]; + bool isQualifierValid = false; + switch (qualifier->getType()) + { + case QtInvariant: + case QtInterpolation: + case QtLayout: + break; + case QtMemory: + isQualifierValid = JoinMemoryQualifier( + &typeQualifier.memoryQualifier, + static_cast<const TMemoryQualifierWrapper *>(qualifier)->getQualifier()); + break; + case QtStorage: + isQualifierValid = JoinParameterStorageQualifier( + &typeQualifier.qualifier, + static_cast<const TStorageQualifierWrapper *>(qualifier)->getQualifier()); + break; + case QtPrecision: + isQualifierValid = true; + typeQualifier.precision = + static_cast<const TPrecisionQualifierWrapper *>(qualifier)->getQualifier(); + ASSERT(typeQualifier.precision != EbpUndefined); + break; + default: + UNREACHABLE(); + } + if (!isQualifierValid) + { + const TString &qualifierString = qualifier->getQualifierString(); + diagnostics->error(qualifier->getLine(), "invalid parameter qualifier", + qualifierString.c_str()); + break; + } + } + + switch (typeQualifier.qualifier) + { + case EvqIn: + case EvqConstReadOnly: // const in + case EvqOut: + case EvqInOut: + break; + case EvqConst: + typeQualifier.qualifier = EvqConstReadOnly; + break; + case EvqTemporary: + // no qualifier has been specified, set it to EvqIn which is the default + typeQualifier.qualifier = EvqIn; + break; + default: + diagnostics->error(sortedSequence[0]->getLine(), "Invalid parameter qualifier ", + getQualifierString(typeQualifier.qualifier)); + } + return typeQualifier; +} +} // namespace + +TLayoutQualifier JoinLayoutQualifiers(TLayoutQualifier leftQualifier, + TLayoutQualifier rightQualifier, + const TSourceLoc &rightQualifierLocation, + TDiagnostics *diagnostics) +{ + TLayoutQualifier joinedQualifier = leftQualifier; + + if (rightQualifier.location != -1) + { + joinedQualifier.location = rightQualifier.location; + ++joinedQualifier.locationsSpecified; + } + if (rightQualifier.yuv != false) + { + joinedQualifier.yuv = rightQualifier.yuv; + } + if (rightQualifier.binding != -1) + { + joinedQualifier.binding = rightQualifier.binding; + } + if (rightQualifier.offset != -1) + { + joinedQualifier.offset = rightQualifier.offset; + } + if (rightQualifier.matrixPacking != EmpUnspecified) + { + joinedQualifier.matrixPacking = rightQualifier.matrixPacking; + } + if (rightQualifier.blockStorage != EbsUnspecified) + { + joinedQualifier.blockStorage = rightQualifier.blockStorage; + } + + for (size_t i = 0u; i < rightQualifier.localSize.size(); ++i) + { + if (rightQualifier.localSize[i] != -1) + { + if (joinedQualifier.localSize[i] != -1 && + joinedQualifier.localSize[i] != rightQualifier.localSize[i]) + { + diagnostics->error(rightQualifierLocation, + "Cannot have multiple different work group size specifiers", + getWorkGroupSizeString(i)); + } + joinedQualifier.localSize[i] = rightQualifier.localSize[i]; + } + } + + if (rightQualifier.numViews != -1) + { + joinedQualifier.numViews = rightQualifier.numViews; + } + + if (rightQualifier.imageInternalFormat != EiifUnspecified) + { + joinedQualifier.imageInternalFormat = rightQualifier.imageInternalFormat; + } + + if (rightQualifier.primitiveType != EptUndefined) + { + if (joinedQualifier.primitiveType != EptUndefined && + joinedQualifier.primitiveType != rightQualifier.primitiveType) + { + diagnostics->error(rightQualifierLocation, + "Cannot have multiple different primitive specifiers", + getGeometryShaderPrimitiveTypeString(rightQualifier.primitiveType)); + } + joinedQualifier.primitiveType = rightQualifier.primitiveType; + } + + if (rightQualifier.invocations != 0) + { + if (joinedQualifier.invocations != 0 && + joinedQualifier.invocations != rightQualifier.invocations) + { + diagnostics->error(rightQualifierLocation, + "Cannot have multiple different invocations specifiers", + "invocations"); + } + joinedQualifier.invocations = rightQualifier.invocations; + } + + if (rightQualifier.maxVertices != -1) + { + if (joinedQualifier.maxVertices != -1 && + joinedQualifier.maxVertices != rightQualifier.maxVertices) + { + diagnostics->error(rightQualifierLocation, + "Cannot have multiple different max_vertices specifiers", + "max_vertices"); + } + joinedQualifier.maxVertices = rightQualifier.maxVertices; + } + + return joinedQualifier; +} + +unsigned int TInvariantQualifierWrapper::getRank() const +{ + return 0u; +} + +unsigned int TInterpolationQualifierWrapper::getRank() const +{ + return 1u; +} + +unsigned int TLayoutQualifierWrapper::getRank() const +{ + return 2u; +} + +unsigned int TStorageQualifierWrapper::getRank() const +{ + // Force the 'centroid' auxilary storage qualifier to be always first among all storage + // qualifiers. + if (mStorageQualifier == EvqCentroid) + { + return 3u; + } + else + { + return 4u; + } +} + +unsigned int TMemoryQualifierWrapper::getRank() const +{ + return 4u; +} + +unsigned int TPrecisionQualifierWrapper::getRank() const +{ + return 5u; +} + +TTypeQualifier::TTypeQualifier(TQualifier scope, const TSourceLoc &loc) + : layoutQualifier(TLayoutQualifier::Create()), + memoryQualifier(TMemoryQualifier::Create()), + precision(EbpUndefined), + qualifier(scope), + invariant(false), + line(loc) +{ + ASSERT(IsScopeQualifier(qualifier)); +} + +TTypeQualifierBuilder::TTypeQualifierBuilder(const TStorageQualifierWrapper *scope, + int shaderVersion) + : mShaderVersion(shaderVersion) +{ + ASSERT(IsScopeQualifier(scope->getQualifier())); + mQualifiers.push_back(scope); +} + +void TTypeQualifierBuilder::appendQualifier(const TQualifierWrapperBase *qualifier) +{ + mQualifiers.push_back(qualifier); +} + +bool TTypeQualifierBuilder::checkSequenceIsValid(TDiagnostics *diagnostics) const +{ + bool areQualifierChecksRelaxed = AreTypeQualifierChecksRelaxed(mShaderVersion); + std::string errorMessage; + if (HasRepeatingQualifiers(mQualifiers, areQualifierChecksRelaxed, &errorMessage)) + { + diagnostics->error(mQualifiers[0]->getLine(), errorMessage.c_str(), "qualifier sequence"); + return false; + } + + if (!areQualifierChecksRelaxed && !AreQualifiersInOrder(mQualifiers, &errorMessage)) + { + diagnostics->error(mQualifiers[0]->getLine(), errorMessage.c_str(), "qualifier sequence"); + return false; + } + + return true; +} + +TTypeQualifier TTypeQualifierBuilder::getParameterTypeQualifier(TDiagnostics *diagnostics) const +{ + ASSERT(IsInvariantCorrect(mQualifiers)); + ASSERT(static_cast<const TStorageQualifierWrapper *>(mQualifiers[0])->getQualifier() == + EvqTemporary); + + if (!checkSequenceIsValid(diagnostics)) + { + return TTypeQualifier(EvqTemporary, mQualifiers[0]->getLine()); + } + + // If the qualifier checks are relaxed, then it is easier to sort the qualifiers so + // that the order imposed by the GLSL ES 3.00 spec is kept. Then we can use the same code to + // combine the qualifiers. + if (AreTypeQualifierChecksRelaxed(mShaderVersion)) + { + // Copy the qualifier sequence so that we can sort them. + QualifierSequence sortedQualifierSequence = mQualifiers; + SortSequence(sortedQualifierSequence); + return GetParameterTypeQualifierFromSortedSequence(sortedQualifierSequence, diagnostics); + } + return GetParameterTypeQualifierFromSortedSequence(mQualifiers, diagnostics); +} + +TTypeQualifier TTypeQualifierBuilder::getVariableTypeQualifier(TDiagnostics *diagnostics) const +{ + ASSERT(IsInvariantCorrect(mQualifiers)); + + if (!checkSequenceIsValid(diagnostics)) + { + return TTypeQualifier( + static_cast<const TStorageQualifierWrapper *>(mQualifiers[0])->getQualifier(), + mQualifiers[0]->getLine()); + } + + // If the qualifier checks are relaxed, then it is easier to sort the qualifiers so + // that the order imposed by the GLSL ES 3.00 spec is kept. Then we can use the same code to + // combine the qualifiers. + if (AreTypeQualifierChecksRelaxed(mShaderVersion)) + { + // Copy the qualifier sequence so that we can sort them. + QualifierSequence sortedQualifierSequence = mQualifiers; + SortSequence(sortedQualifierSequence); + return GetVariableTypeQualifierFromSortedSequence(sortedQualifierSequence, diagnostics); + } + return GetVariableTypeQualifierFromSortedSequence(mQualifiers, diagnostics); +} + +} // namespace sh |