| // |
| // Copyright (c) 2002-2014 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/OutputGLSLBase.h" |
| |
| #include "common/debug.h" |
| #include "common/mathutil.h" |
| |
| #include <cfloat> |
| |
| namespace sh |
| { |
| |
| namespace |
| { |
| TString arrayBrackets(const TType &type) |
| { |
| ASSERT(type.isArray()); |
| TInfoSinkBase out; |
| out << "[" << type.getArraySize() << "]"; |
| return TString(out.c_str()); |
| } |
| |
| bool isSingleStatement(TIntermNode *node) |
| { |
| if (node->getAsFunctionDefinition()) |
| { |
| return false; |
| } |
| else if (node->getAsBlock()) |
| { |
| return false; |
| } |
| else if (node->getAsIfElseNode()) |
| { |
| return false; |
| } |
| else if (node->getAsLoopNode()) |
| { |
| return false; |
| } |
| else if (node->getAsSwitchNode()) |
| { |
| return false; |
| } |
| else if (node->getAsCaseNode()) |
| { |
| return false; |
| } |
| return true; |
| } |
| |
| // If SH_SCALARIZE_VEC_AND_MAT_CONSTRUCTOR_ARGS is enabled, layout qualifiers are spilled whenever |
| // variables with specified layout qualifiers are copied. Additional checks are needed against the |
| // type and storage qualifier of the variable to verify that layout qualifiers have to be outputted. |
| // TODO (mradev): Fix layout qualifier spilling in ScalarizeVecAndMatConstructorArgs and remove |
| // NeedsToWriteLayoutQualifier. |
| bool NeedsToWriteLayoutQualifier(const TType &type) |
| { |
| if (type.getBasicType() == EbtInterfaceBlock) |
| { |
| return false; |
| } |
| |
| const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier(); |
| |
| if ((type.getQualifier() == EvqFragmentOut || type.getQualifier() == EvqVertexIn) && |
| layoutQualifier.location >= 0) |
| { |
| return true; |
| } |
| |
| if (type.getQualifier() == EvqFragmentOut && layoutQualifier.yuv == true) |
| { |
| return true; |
| } |
| |
| if (IsOpaqueType(type.getBasicType()) && layoutQualifier.binding != -1) |
| { |
| return true; |
| } |
| |
| if (IsImage(type.getBasicType()) && layoutQualifier.imageInternalFormat != EiifUnspecified) |
| { |
| return true; |
| } |
| return false; |
| } |
| |
| class CommaSeparatedListItemPrefixGenerator |
| { |
| public: |
| CommaSeparatedListItemPrefixGenerator() : mFirst(true) {} |
| private: |
| bool mFirst; |
| |
| friend TInfoSinkBase &operator<<(TInfoSinkBase &out, |
| CommaSeparatedListItemPrefixGenerator &gen); |
| }; |
| |
| TInfoSinkBase &operator<<(TInfoSinkBase &out, CommaSeparatedListItemPrefixGenerator &gen) |
| { |
| if (gen.mFirst) |
| { |
| gen.mFirst = false; |
| } |
| else |
| { |
| out << ", "; |
| } |
| return out; |
| } |
| |
| } // namespace |
| |
| TOutputGLSLBase::TOutputGLSLBase(TInfoSinkBase &objSink, |
| ShArrayIndexClampingStrategy clampingStrategy, |
| ShHashFunction64 hashFunction, |
| NameMap &nameMap, |
| TSymbolTable &symbolTable, |
| sh::GLenum shaderType, |
| int shaderVersion, |
| ShShaderOutput output, |
| ShCompileOptions compileOptions) |
| : TIntermTraverser(true, true, true), |
| mObjSink(objSink), |
| mDeclaringVariables(false), |
| mClampingStrategy(clampingStrategy), |
| mHashFunction(hashFunction), |
| mNameMap(nameMap), |
| mSymbolTable(symbolTable), |
| mShaderType(shaderType), |
| mShaderVersion(shaderVersion), |
| mOutput(output), |
| mCompileOptions(compileOptions) |
| { |
| } |
| |
| void TOutputGLSLBase::writeInvariantQualifier(const TType &type) |
| { |
| if (!sh::RemoveInvariant(mShaderType, mShaderVersion, mOutput, mCompileOptions)) |
| { |
| TInfoSinkBase &out = objSink(); |
| out << "invariant "; |
| } |
| } |
| |
| void TOutputGLSLBase::writeFloat(TInfoSinkBase &out, float f) |
| { |
| if ((gl::isInf(f) || gl::isNaN(f)) && mShaderVersion >= 300) |
| { |
| out << "uintBitsToFloat(" << gl::bitCast<uint32_t>(f) << "u)"; |
| } |
| else |
| { |
| out << std::min(FLT_MAX, std::max(-FLT_MAX, f)); |
| } |
| } |
| |
| void TOutputGLSLBase::writeTriplet(Visit visit, |
| const char *preStr, |
| const char *inStr, |
| const char *postStr) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (visit == PreVisit && preStr) |
| out << preStr; |
| else if (visit == InVisit && inStr) |
| out << inStr; |
| else if (visit == PostVisit && postStr) |
| out << postStr; |
| } |
| |
| void TOutputGLSLBase::writeBuiltInFunctionTriplet(Visit visit, |
| TOperator op, |
| bool useEmulatedFunction) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (visit == PreVisit) |
| { |
| const char *opStr(GetOperatorString(op)); |
| if (useEmulatedFunction) |
| { |
| BuiltInFunctionEmulator::WriteEmulatedFunctionName(out, opStr); |
| } |
| else |
| { |
| out << opStr; |
| } |
| out << "("; |
| } |
| else |
| { |
| writeTriplet(visit, nullptr, ", ", ")"); |
| } |
| } |
| |
| void TOutputGLSLBase::writeLayoutQualifier(const TType &type) |
| { |
| if (!NeedsToWriteLayoutQualifier(type)) |
| { |
| return; |
| } |
| |
| TInfoSinkBase &out = objSink(); |
| const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier(); |
| out << "layout("; |
| |
| CommaSeparatedListItemPrefixGenerator listItemPrefix; |
| |
| if (type.getQualifier() == EvqFragmentOut || type.getQualifier() == EvqVertexIn) |
| { |
| if (layoutQualifier.location >= 0) |
| { |
| out << listItemPrefix << "location = " << layoutQualifier.location; |
| } |
| } |
| |
| if (type.getQualifier() == EvqFragmentOut) |
| { |
| if (layoutQualifier.yuv == true) |
| { |
| out << listItemPrefix << "yuv"; |
| } |
| } |
| |
| if (IsOpaqueType(type.getBasicType())) |
| { |
| if (layoutQualifier.binding >= 0) |
| { |
| out << listItemPrefix << "binding = " << layoutQualifier.binding; |
| } |
| } |
| |
| if (IsImage(type.getBasicType())) |
| { |
| if (layoutQualifier.imageInternalFormat != EiifUnspecified) |
| { |
| ASSERT(type.getQualifier() == EvqTemporary || type.getQualifier() == EvqUniform); |
| out << listItemPrefix |
| << getImageInternalFormatString(layoutQualifier.imageInternalFormat); |
| } |
| } |
| |
| out << ") "; |
| } |
| |
| const char *TOutputGLSLBase::mapQualifierToString(TQualifier qualifier) |
| { |
| if (sh::IsGLSL410OrOlder(mOutput) && mShaderVersion >= 300 && |
| (mCompileOptions & SH_REMOVE_INVARIANT_AND_CENTROID_FOR_ESSL3) != 0) |
| { |
| switch (qualifier) |
| { |
| // The return string is consistent with sh::getQualifierString() from |
| // BaseTypes.h minus the "centroid" keyword. |
| case EvqCentroid: |
| return ""; |
| case EvqCentroidIn: |
| return "smooth in"; |
| case EvqCentroidOut: |
| return "smooth out"; |
| default: |
| break; |
| } |
| } |
| if (sh::IsGLSL130OrNewer(mOutput)) |
| { |
| switch (qualifier) |
| { |
| case EvqAttribute: |
| return "in"; |
| case EvqVaryingIn: |
| return "in"; |
| case EvqVaryingOut: |
| return "out"; |
| default: |
| break; |
| } |
| } |
| return sh::getQualifierString(qualifier); |
| } |
| |
| void TOutputGLSLBase::writeVariableType(const TType &type) |
| { |
| TQualifier qualifier = type.getQualifier(); |
| TInfoSinkBase &out = objSink(); |
| if (type.isInvariant()) |
| { |
| writeInvariantQualifier(type); |
| } |
| if (type.getBasicType() == EbtInterfaceBlock) |
| { |
| TInterfaceBlock *interfaceBlock = type.getInterfaceBlock(); |
| declareInterfaceBlockLayout(interfaceBlock); |
| } |
| if (qualifier != EvqTemporary && qualifier != EvqGlobal) |
| { |
| const char *qualifierString = mapQualifierToString(qualifier); |
| if (qualifierString && qualifierString[0] != '\0') |
| { |
| out << qualifierString << " "; |
| } |
| } |
| |
| const TMemoryQualifier &memoryQualifier = type.getMemoryQualifier(); |
| if (memoryQualifier.readonly) |
| { |
| ASSERT(IsImage(type.getBasicType())); |
| out << "readonly "; |
| } |
| |
| if (memoryQualifier.writeonly) |
| { |
| ASSERT(IsImage(type.getBasicType())); |
| out << "writeonly "; |
| } |
| |
| if (memoryQualifier.coherent) |
| { |
| ASSERT(IsImage(type.getBasicType())); |
| out << "coherent "; |
| } |
| |
| if (memoryQualifier.restrictQualifier) |
| { |
| ASSERT(IsImage(type.getBasicType())); |
| out << "restrict "; |
| } |
| |
| if (memoryQualifier.volatileQualifier) |
| { |
| ASSERT(IsImage(type.getBasicType())); |
| out << "volatile "; |
| } |
| |
| // Declare the struct if we have not done so already. |
| if (type.getBasicType() == EbtStruct && !structDeclared(type.getStruct())) |
| { |
| TStructure *structure = type.getStruct(); |
| |
| declareStruct(structure); |
| |
| if (!structure->name().empty()) |
| { |
| mDeclaredStructs.insert(structure->uniqueId()); |
| } |
| } |
| else if (type.getBasicType() == EbtInterfaceBlock) |
| { |
| TInterfaceBlock *interfaceBlock = type.getInterfaceBlock(); |
| declareInterfaceBlock(interfaceBlock); |
| } |
| else |
| { |
| if (writeVariablePrecision(type.getPrecision())) |
| out << " "; |
| out << getTypeName(type); |
| } |
| } |
| |
| void TOutputGLSLBase::writeFunctionParameters(const TIntermSequence &args) |
| { |
| TInfoSinkBase &out = objSink(); |
| for (TIntermSequence::const_iterator iter = args.begin(); iter != args.end(); ++iter) |
| { |
| const TIntermSymbol *arg = (*iter)->getAsSymbolNode(); |
| ASSERT(arg != nullptr); |
| |
| const TType &type = arg->getType(); |
| writeVariableType(type); |
| |
| if (!arg->getName().getString().empty()) |
| out << " " << hashName(arg->getName()); |
| if (type.isArray()) |
| out << arrayBrackets(type); |
| |
| // Put a comma if this is not the last argument. |
| if (iter != args.end() - 1) |
| out << ", "; |
| } |
| } |
| |
| const TConstantUnion *TOutputGLSLBase::writeConstantUnion(const TType &type, |
| const TConstantUnion *pConstUnion) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| if (type.getBasicType() == EbtStruct) |
| { |
| const TStructure *structure = type.getStruct(); |
| out << hashName(TName(structure->name())) << "("; |
| |
| const TFieldList &fields = structure->fields(); |
| for (size_t i = 0; i < fields.size(); ++i) |
| { |
| const TType *fieldType = fields[i]->type(); |
| ASSERT(fieldType != nullptr); |
| pConstUnion = writeConstantUnion(*fieldType, pConstUnion); |
| if (i != fields.size() - 1) |
| out << ", "; |
| } |
| out << ")"; |
| } |
| else |
| { |
| size_t size = type.getObjectSize(); |
| bool writeType = size > 1; |
| if (writeType) |
| out << getTypeName(type) << "("; |
| for (size_t i = 0; i < size; ++i, ++pConstUnion) |
| { |
| switch (pConstUnion->getType()) |
| { |
| case EbtFloat: |
| writeFloat(out, pConstUnion->getFConst()); |
| break; |
| case EbtInt: |
| out << pConstUnion->getIConst(); |
| break; |
| case EbtUInt: |
| out << pConstUnion->getUConst() << "u"; |
| break; |
| case EbtBool: |
| out << pConstUnion->getBConst(); |
| break; |
| case EbtYuvCscStandardEXT: |
| out << getYuvCscStandardEXTString(pConstUnion->getYuvCscStandardEXTConst()); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| if (i != size - 1) |
| out << ", "; |
| } |
| if (writeType) |
| out << ")"; |
| } |
| return pConstUnion; |
| } |
| |
| void TOutputGLSLBase::writeConstructorTriplet(Visit visit, const TType &type) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (visit == PreVisit) |
| { |
| if (type.isArray()) |
| { |
| out << getTypeName(type); |
| out << arrayBrackets(type); |
| out << "("; |
| } |
| else |
| { |
| out << getTypeName(type) << "("; |
| } |
| } |
| else |
| { |
| writeTriplet(visit, nullptr, ", ", ")"); |
| } |
| } |
| |
| void TOutputGLSLBase::visitSymbol(TIntermSymbol *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| out << hashVariableName(node->getName()); |
| |
| if (mDeclaringVariables && node->getType().isArray()) |
| out << arrayBrackets(node->getType()); |
| } |
| |
| void TOutputGLSLBase::visitConstantUnion(TIntermConstantUnion *node) |
| { |
| writeConstantUnion(node->getType(), node->getUnionArrayPointer()); |
| } |
| |
| bool TOutputGLSLBase::visitSwizzle(Visit visit, TIntermSwizzle *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (visit == PostVisit) |
| { |
| out << "."; |
| node->writeOffsetsAsXYZW(&out); |
| } |
| return true; |
| } |
| |
| bool TOutputGLSLBase::visitBinary(Visit visit, TIntermBinary *node) |
| { |
| bool visitChildren = true; |
| TInfoSinkBase &out = objSink(); |
| switch (node->getOp()) |
| { |
| case EOpComma: |
| writeTriplet(visit, "(", ", ", ")"); |
| break; |
| case EOpInitialize: |
| if (visit == InVisit) |
| { |
| out << " = "; |
| // RHS of initialize is not being declared. |
| mDeclaringVariables = false; |
| } |
| break; |
| case EOpAssign: |
| writeTriplet(visit, "(", " = ", ")"); |
| break; |
| case EOpAddAssign: |
| writeTriplet(visit, "(", " += ", ")"); |
| break; |
| case EOpSubAssign: |
| writeTriplet(visit, "(", " -= ", ")"); |
| break; |
| case EOpDivAssign: |
| writeTriplet(visit, "(", " /= ", ")"); |
| break; |
| case EOpIModAssign: |
| writeTriplet(visit, "(", " %= ", ")"); |
| break; |
| // Notice the fall-through. |
| case EOpMulAssign: |
| case EOpVectorTimesMatrixAssign: |
| case EOpVectorTimesScalarAssign: |
| case EOpMatrixTimesScalarAssign: |
| case EOpMatrixTimesMatrixAssign: |
| writeTriplet(visit, "(", " *= ", ")"); |
| break; |
| case EOpBitShiftLeftAssign: |
| writeTriplet(visit, "(", " <<= ", ")"); |
| break; |
| case EOpBitShiftRightAssign: |
| writeTriplet(visit, "(", " >>= ", ")"); |
| break; |
| case EOpBitwiseAndAssign: |
| writeTriplet(visit, "(", " &= ", ")"); |
| break; |
| case EOpBitwiseXorAssign: |
| writeTriplet(visit, "(", " ^= ", ")"); |
| break; |
| case EOpBitwiseOrAssign: |
| writeTriplet(visit, "(", " |= ", ")"); |
| break; |
| |
| case EOpIndexDirect: |
| writeTriplet(visit, nullptr, "[", "]"); |
| break; |
| case EOpIndexIndirect: |
| if (node->getAddIndexClamp()) |
| { |
| if (visit == InVisit) |
| { |
| if (mClampingStrategy == SH_CLAMP_WITH_CLAMP_INTRINSIC) |
| out << "[int(clamp(float("; |
| else |
| out << "[webgl_int_clamp("; |
| } |
| else if (visit == PostVisit) |
| { |
| int maxSize; |
| TIntermTyped *left = node->getLeft(); |
| TType leftType = left->getType(); |
| |
| if (left->isArray()) |
| { |
| // The shader will fail validation if the array length is not > 0. |
| maxSize = static_cast<int>(leftType.getArraySize()) - 1; |
| } |
| else |
| { |
| maxSize = leftType.getNominalSize() - 1; |
| } |
| |
| if (mClampingStrategy == SH_CLAMP_WITH_CLAMP_INTRINSIC) |
| out << "), 0.0, float(" << maxSize << ")))]"; |
| else |
| out << ", 0, " << maxSize << ")]"; |
| } |
| } |
| else |
| { |
| writeTriplet(visit, nullptr, "[", "]"); |
| } |
| break; |
| case EOpIndexDirectStruct: |
| if (visit == InVisit) |
| { |
| // Here we are writing out "foo.bar", where "foo" is struct |
| // and "bar" is field. In AST, it is represented as a binary |
| // node, where left child represents "foo" and right child "bar". |
| // The node itself represents ".". The struct field "bar" is |
| // actually stored as an index into TStructure::fields. |
| out << "."; |
| const TStructure *structure = node->getLeft()->getType().getStruct(); |
| const TIntermConstantUnion *index = node->getRight()->getAsConstantUnion(); |
| const TField *field = structure->fields()[index->getIConst(0)]; |
| |
| TString fieldName = field->name(); |
| if (!mSymbolTable.findBuiltIn(structure->name(), mShaderVersion)) |
| fieldName = hashName(TName(fieldName)); |
| |
| out << fieldName; |
| visitChildren = false; |
| } |
| break; |
| case EOpIndexDirectInterfaceBlock: |
| if (visit == InVisit) |
| { |
| out << "."; |
| const TInterfaceBlock *interfaceBlock = |
| node->getLeft()->getType().getInterfaceBlock(); |
| const TIntermConstantUnion *index = node->getRight()->getAsConstantUnion(); |
| const TField *field = interfaceBlock->fields()[index->getIConst(0)]; |
| |
| TString fieldName = field->name(); |
| ASSERT(!mSymbolTable.findBuiltIn(interfaceBlock->name(), mShaderVersion)); |
| fieldName = hashName(TName(fieldName)); |
| |
| out << fieldName; |
| visitChildren = false; |
| } |
| break; |
| |
| case EOpAdd: |
| writeTriplet(visit, "(", " + ", ")"); |
| break; |
| case EOpSub: |
| writeTriplet(visit, "(", " - ", ")"); |
| break; |
| case EOpMul: |
| writeTriplet(visit, "(", " * ", ")"); |
| break; |
| case EOpDiv: |
| writeTriplet(visit, "(", " / ", ")"); |
| break; |
| case EOpIMod: |
| writeTriplet(visit, "(", " % ", ")"); |
| break; |
| case EOpBitShiftLeft: |
| writeTriplet(visit, "(", " << ", ")"); |
| break; |
| case EOpBitShiftRight: |
| writeTriplet(visit, "(", " >> ", ")"); |
| break; |
| case EOpBitwiseAnd: |
| writeTriplet(visit, "(", " & ", ")"); |
| break; |
| case EOpBitwiseXor: |
| writeTriplet(visit, "(", " ^ ", ")"); |
| break; |
| case EOpBitwiseOr: |
| writeTriplet(visit, "(", " | ", ")"); |
| break; |
| |
| case EOpEqual: |
| writeTriplet(visit, "(", " == ", ")"); |
| break; |
| case EOpNotEqual: |
| writeTriplet(visit, "(", " != ", ")"); |
| break; |
| case EOpLessThan: |
| writeTriplet(visit, "(", " < ", ")"); |
| break; |
| case EOpGreaterThan: |
| writeTriplet(visit, "(", " > ", ")"); |
| break; |
| case EOpLessThanEqual: |
| writeTriplet(visit, "(", " <= ", ")"); |
| break; |
| case EOpGreaterThanEqual: |
| writeTriplet(visit, "(", " >= ", ")"); |
| break; |
| |
| // Notice the fall-through. |
| case EOpVectorTimesScalar: |
| case EOpVectorTimesMatrix: |
| case EOpMatrixTimesVector: |
| case EOpMatrixTimesScalar: |
| case EOpMatrixTimesMatrix: |
| writeTriplet(visit, "(", " * ", ")"); |
| break; |
| |
| case EOpLogicalOr: |
| writeTriplet(visit, "(", " || ", ")"); |
| break; |
| case EOpLogicalXor: |
| writeTriplet(visit, "(", " ^^ ", ")"); |
| break; |
| case EOpLogicalAnd: |
| writeTriplet(visit, "(", " && ", ")"); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| return visitChildren; |
| } |
| |
| bool TOutputGLSLBase::visitUnary(Visit visit, TIntermUnary *node) |
| { |
| TString preString; |
| TString postString = ")"; |
| |
| switch (node->getOp()) |
| { |
| case EOpNegative: |
| preString = "(-"; |
| break; |
| case EOpPositive: |
| preString = "(+"; |
| break; |
| case EOpLogicalNot: |
| preString = "(!"; |
| break; |
| case EOpBitwiseNot: |
| preString = "(~"; |
| break; |
| |
| case EOpPostIncrement: |
| preString = "("; |
| postString = "++)"; |
| break; |
| case EOpPostDecrement: |
| preString = "("; |
| postString = "--)"; |
| break; |
| case EOpPreIncrement: |
| preString = "(++"; |
| break; |
| case EOpPreDecrement: |
| preString = "(--"; |
| break; |
| |
| case EOpRadians: |
| case EOpDegrees: |
| case EOpSin: |
| case EOpCos: |
| case EOpTan: |
| case EOpAsin: |
| case EOpAcos: |
| case EOpAtan: |
| case EOpSinh: |
| case EOpCosh: |
| case EOpTanh: |
| case EOpAsinh: |
| case EOpAcosh: |
| case EOpAtanh: |
| case EOpExp: |
| case EOpLog: |
| case EOpExp2: |
| case EOpLog2: |
| case EOpSqrt: |
| case EOpInverseSqrt: |
| case EOpAbs: |
| case EOpSign: |
| case EOpFloor: |
| case EOpTrunc: |
| case EOpRound: |
| case EOpRoundEven: |
| case EOpCeil: |
| case EOpFract: |
| case EOpIsNan: |
| case EOpIsInf: |
| case EOpFloatBitsToInt: |
| case EOpFloatBitsToUint: |
| case EOpIntBitsToFloat: |
| case EOpUintBitsToFloat: |
| case EOpPackSnorm2x16: |
| case EOpPackUnorm2x16: |
| case EOpPackHalf2x16: |
| case EOpUnpackSnorm2x16: |
| case EOpUnpackUnorm2x16: |
| case EOpUnpackHalf2x16: |
| case EOpPackUnorm4x8: |
| case EOpPackSnorm4x8: |
| case EOpUnpackUnorm4x8: |
| case EOpUnpackSnorm4x8: |
| case EOpLength: |
| case EOpNormalize: |
| case EOpDFdx: |
| case EOpDFdy: |
| case EOpFwidth: |
| case EOpTranspose: |
| case EOpDeterminant: |
| case EOpInverse: |
| case EOpAny: |
| case EOpAll: |
| case EOpLogicalNotComponentWise: |
| case EOpBitfieldReverse: |
| case EOpBitCount: |
| case EOpFindLSB: |
| case EOpFindMSB: |
| writeBuiltInFunctionTriplet(visit, node->getOp(), node->getUseEmulatedFunction()); |
| return true; |
| default: |
| UNREACHABLE(); |
| } |
| |
| writeTriplet(visit, preString.c_str(), nullptr, postString.c_str()); |
| |
| return true; |
| } |
| |
| bool TOutputGLSLBase::visitTernary(Visit visit, TIntermTernary *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| // Notice two brackets at the beginning and end. The outer ones |
| // encapsulate the whole ternary expression. This preserves the |
| // order of precedence when ternary expressions are used in a |
| // compound expression, i.e., c = 2 * (a < b ? 1 : 2). |
| out << "(("; |
| node->getCondition()->traverse(this); |
| out << ") ? ("; |
| node->getTrueExpression()->traverse(this); |
| out << ") : ("; |
| node->getFalseExpression()->traverse(this); |
| out << "))"; |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitIfElse(Visit visit, TIntermIfElse *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << "if ("; |
| node->getCondition()->traverse(this); |
| out << ")\n"; |
| |
| visitCodeBlock(node->getTrueBlock()); |
| |
| if (node->getFalseBlock()) |
| { |
| out << "else\n"; |
| visitCodeBlock(node->getFalseBlock()); |
| } |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitSwitch(Visit visit, TIntermSwitch *node) |
| { |
| if (node->getStatementList()) |
| { |
| writeTriplet(visit, "switch (", ") ", nullptr); |
| // The curly braces get written when visiting the statementList aggregate |
| } |
| else |
| { |
| // No statementList, so it won't output curly braces |
| writeTriplet(visit, "switch (", ") {", "}\n"); |
| } |
| return true; |
| } |
| |
| bool TOutputGLSLBase::visitCase(Visit visit, TIntermCase *node) |
| { |
| if (node->hasCondition()) |
| { |
| writeTriplet(visit, "case (", nullptr, "):\n"); |
| return true; |
| } |
| else |
| { |
| TInfoSinkBase &out = objSink(); |
| out << "default:\n"; |
| return false; |
| } |
| } |
| |
| bool TOutputGLSLBase::visitBlock(Visit visit, TIntermBlock *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| // Scope the blocks except when at the global scope. |
| if (mDepth > 0) |
| { |
| out << "{\n"; |
| } |
| |
| for (TIntermSequence::const_iterator iter = node->getSequence()->begin(); |
| iter != node->getSequence()->end(); ++iter) |
| { |
| TIntermNode *curNode = *iter; |
| ASSERT(curNode != nullptr); |
| curNode->traverse(this); |
| |
| if (isSingleStatement(curNode)) |
| out << ";\n"; |
| } |
| |
| // Scope the blocks except when at the global scope. |
| if (mDepth > 0) |
| { |
| out << "}\n"; |
| } |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitFunctionDefinition(Visit visit, TIntermFunctionDefinition *node) |
| { |
| TIntermFunctionPrototype *prototype = node->getFunctionPrototype(); |
| prototype->traverse(this); |
| visitCodeBlock(node->getBody()); |
| |
| // Fully processed; no need to visit children. |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitInvariantDeclaration(Visit visit, TIntermInvariantDeclaration *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| ASSERT(visit == PreVisit); |
| const TIntermSymbol *symbol = node->getSymbol(); |
| out << "invariant " << hashVariableName(symbol->getName()); |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitFunctionPrototype(Visit visit, TIntermFunctionPrototype *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| ASSERT(visit == PreVisit); |
| |
| const TType &type = node->getType(); |
| writeVariableType(type); |
| if (type.isArray()) |
| out << arrayBrackets(type); |
| |
| out << " " << hashFunctionNameIfNeeded(*node->getFunctionSymbolInfo()); |
| |
| out << "("; |
| writeFunctionParameters(*(node->getSequence())); |
| out << ")"; |
| |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitAggregate(Visit visit, TIntermAggregate *node) |
| { |
| bool visitChildren = true; |
| TInfoSinkBase &out = objSink(); |
| switch (node->getOp()) |
| { |
| case EOpCallFunctionInAST: |
| case EOpCallInternalRawFunction: |
| case EOpCallBuiltInFunction: |
| // Function call. |
| if (visit == PreVisit) |
| { |
| if (node->getOp() == EOpCallBuiltInFunction) |
| { |
| out << translateTextureFunction(node->getFunctionSymbolInfo()->getName()); |
| } |
| else |
| { |
| out << hashFunctionNameIfNeeded(*node->getFunctionSymbolInfo()); |
| } |
| out << "("; |
| } |
| else if (visit == InVisit) |
| out << ", "; |
| else |
| out << ")"; |
| break; |
| case EOpConstruct: |
| writeConstructorTriplet(visit, node->getType()); |
| break; |
| |
| case EOpEqualComponentWise: |
| case EOpNotEqualComponentWise: |
| case EOpLessThanComponentWise: |
| case EOpGreaterThanComponentWise: |
| case EOpLessThanEqualComponentWise: |
| case EOpGreaterThanEqualComponentWise: |
| case EOpMod: |
| case EOpModf: |
| case EOpPow: |
| case EOpAtan: |
| case EOpMin: |
| case EOpMax: |
| case EOpClamp: |
| case EOpMix: |
| case EOpStep: |
| case EOpSmoothStep: |
| case EOpFrexp: |
| case EOpLdexp: |
| case EOpDistance: |
| case EOpDot: |
| case EOpCross: |
| case EOpFaceForward: |
| case EOpReflect: |
| case EOpRefract: |
| case EOpMulMatrixComponentWise: |
| case EOpOuterProduct: |
| case EOpBitfieldExtract: |
| case EOpBitfieldInsert: |
| case EOpUaddCarry: |
| case EOpUsubBorrow: |
| case EOpUmulExtended: |
| case EOpImulExtended: |
| case EOpBarrier: |
| case EOpMemoryBarrier: |
| case EOpMemoryBarrierAtomicCounter: |
| case EOpMemoryBarrierBuffer: |
| case EOpMemoryBarrierImage: |
| case EOpMemoryBarrierShared: |
| case EOpGroupMemoryBarrier: |
| writeBuiltInFunctionTriplet(visit, node->getOp(), node->getUseEmulatedFunction()); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| return visitChildren; |
| } |
| |
| bool TOutputGLSLBase::visitDeclaration(Visit visit, TIntermDeclaration *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| // Variable declaration. |
| if (visit == PreVisit) |
| { |
| const TIntermSequence &sequence = *(node->getSequence()); |
| const TIntermTyped *variable = sequence.front()->getAsTyped(); |
| writeLayoutQualifier(variable->getType()); |
| writeVariableType(variable->getType()); |
| out << " "; |
| mDeclaringVariables = true; |
| } |
| else if (visit == InVisit) |
| { |
| out << ", "; |
| mDeclaringVariables = true; |
| } |
| else |
| { |
| mDeclaringVariables = false; |
| } |
| return true; |
| } |
| |
| bool TOutputGLSLBase::visitLoop(Visit visit, TIntermLoop *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| TLoopType loopType = node->getType(); |
| |
| if (loopType == ELoopFor) // for loop |
| { |
| out << "for ("; |
| if (node->getInit()) |
| node->getInit()->traverse(this); |
| out << "; "; |
| |
| if (node->getCondition()) |
| node->getCondition()->traverse(this); |
| out << "; "; |
| |
| if (node->getExpression()) |
| node->getExpression()->traverse(this); |
| out << ")\n"; |
| |
| visitCodeBlock(node->getBody()); |
| } |
| else if (loopType == ELoopWhile) // while loop |
| { |
| out << "while ("; |
| ASSERT(node->getCondition() != nullptr); |
| node->getCondition()->traverse(this); |
| out << ")\n"; |
| |
| visitCodeBlock(node->getBody()); |
| } |
| else // do-while loop |
| { |
| ASSERT(loopType == ELoopDoWhile); |
| out << "do\n"; |
| |
| visitCodeBlock(node->getBody()); |
| |
| out << "while ("; |
| ASSERT(node->getCondition() != nullptr); |
| node->getCondition()->traverse(this); |
| out << ");\n"; |
| } |
| |
| // No need to visit children. They have been already processed in |
| // this function. |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitBranch(Visit visit, TIntermBranch *node) |
| { |
| switch (node->getFlowOp()) |
| { |
| case EOpKill: |
| writeTriplet(visit, "discard", nullptr, nullptr); |
| break; |
| case EOpBreak: |
| writeTriplet(visit, "break", nullptr, nullptr); |
| break; |
| case EOpContinue: |
| writeTriplet(visit, "continue", nullptr, nullptr); |
| break; |
| case EOpReturn: |
| writeTriplet(visit, "return ", nullptr, nullptr); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| return true; |
| } |
| |
| void TOutputGLSLBase::visitCodeBlock(TIntermBlock *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (node != nullptr) |
| { |
| node->traverse(this); |
| // Single statements not part of a sequence need to be terminated |
| // with semi-colon. |
| if (isSingleStatement(node)) |
| out << ";\n"; |
| } |
| else |
| { |
| out << "{\n}\n"; // Empty code block. |
| } |
| } |
| |
| TString TOutputGLSLBase::getTypeName(const TType &type) |
| { |
| if (type.getBasicType() == EbtStruct) |
| return hashName(TName(type.getStruct()->name())); |
| else |
| return type.getBuiltInTypeNameString(); |
| } |
| |
| TString TOutputGLSLBase::hashName(const TName &name) |
| { |
| if (name.getString().empty()) |
| { |
| ASSERT(!name.isInternal()); |
| return name.getString(); |
| } |
| if (name.isInternal()) |
| { |
| // TODO(oetuaho): Would be nicer to prefix non-internal names with "_" instead, like is |
| // done in the HLSL output, but that requires fairly complex changes elsewhere in the code |
| // as well. |
| // We need to use a prefix that is reserved in WebGL in order to guarantee that the internal |
| // names don't conflict with user-defined names from WebGL. |
| return "webgl_angle_" + name.getString(); |
| } |
| if (mHashFunction == nullptr) |
| { |
| return name.getString(); |
| } |
| NameMap::const_iterator it = mNameMap.find(name.getString().c_str()); |
| if (it != mNameMap.end()) |
| return it->second.c_str(); |
| TString hashedName = TIntermTraverser::hash(name.getString(), mHashFunction); |
| mNameMap[name.getString().c_str()] = hashedName.c_str(); |
| return hashedName; |
| } |
| |
| TString TOutputGLSLBase::hashVariableName(const TName &name) |
| { |
| if (mSymbolTable.findBuiltIn(name.getString(), mShaderVersion) != nullptr) |
| { |
| if (mCompileOptions & SH_TRANSLATE_VIEWID_OVR_TO_UNIFORM && |
| name.getString() == "gl_ViewID_OVR") |
| { |
| TName uniformName(TString("ViewID_OVR")); |
| uniformName.setInternal(true); |
| return hashName(uniformName); |
| } |
| return name.getString(); |
| } |
| return hashName(name); |
| } |
| |
| TString TOutputGLSLBase::hashFunctionNameIfNeeded(const TFunctionSymbolInfo &info) |
| { |
| if (info.isMain() || info.getNameObj().isInternal()) |
| { |
| // Internal function names are outputted as-is - they may refer to functions manually added |
| // to the output shader source that are not included in the AST at all. |
| return info.getName(); |
| } |
| else |
| { |
| return hashName(info.getNameObj()); |
| } |
| } |
| |
| bool TOutputGLSLBase::structDeclared(const TStructure *structure) const |
| { |
| ASSERT(structure); |
| if (structure->name().empty()) |
| { |
| return false; |
| } |
| |
| return (mDeclaredStructs.count(structure->uniqueId()) > 0); |
| } |
| |
| void TOutputGLSLBase::declareStruct(const TStructure *structure) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << "struct " << hashName(TName(structure->name())) << "{\n"; |
| const TFieldList &fields = structure->fields(); |
| for (size_t i = 0; i < fields.size(); ++i) |
| { |
| const TField *field = fields[i]; |
| if (writeVariablePrecision(field->type()->getPrecision())) |
| out << " "; |
| out << getTypeName(*field->type()) << " " << hashName(TName(field->name())); |
| if (field->type()->isArray()) |
| out << arrayBrackets(*field->type()); |
| out << ";\n"; |
| } |
| out << "}"; |
| } |
| |
| void TOutputGLSLBase::declareInterfaceBlockLayout(const TInterfaceBlock *interfaceBlock) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << "layout("; |
| |
| switch (interfaceBlock->blockStorage()) |
| { |
| case EbsUnspecified: |
| case EbsShared: |
| // Default block storage is shared. |
| out << "shared"; |
| break; |
| |
| case EbsPacked: |
| out << "packed"; |
| break; |
| |
| case EbsStd140: |
| out << "std140"; |
| break; |
| |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| out << ", "; |
| |
| switch (interfaceBlock->matrixPacking()) |
| { |
| case EmpUnspecified: |
| case EmpColumnMajor: |
| // Default matrix packing is column major. |
| out << "column_major"; |
| break; |
| |
| case EmpRowMajor: |
| out << "row_major"; |
| break; |
| |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| out << ") "; |
| } |
| |
| void TOutputGLSLBase::declareInterfaceBlock(const TInterfaceBlock *interfaceBlock) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << hashName(TName(interfaceBlock->name())) << "{\n"; |
| const TFieldList &fields = interfaceBlock->fields(); |
| for (size_t i = 0; i < fields.size(); ++i) |
| { |
| const TField *field = fields[i]; |
| if (writeVariablePrecision(field->type()->getPrecision())) |
| out << " "; |
| out << getTypeName(*field->type()) << " " << hashName(TName(field->name())); |
| if (field->type()->isArray()) |
| out << arrayBrackets(*field->type()); |
| out << ";\n"; |
| } |
| out << "}"; |
| } |
| |
| } // namespace sh |
