| // |
| // Copyright 2002 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 "angle_gl.h" |
| #include "common/debug.h" |
| #include "common/mathutil.h" |
| #include "compiler/translator/Compiler.h" |
| #include "compiler/translator/util.h" |
| |
| #include <cfloat> |
| |
| namespace sh |
| { |
| |
| namespace |
| { |
| |
| 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; |
| } |
| else if (node->getAsPreprocessorDirective()) |
| { |
| return false; |
| } |
| return true; |
| } |
| |
| class CommaSeparatedListItemPrefixGenerator |
| { |
| public: |
| CommaSeparatedListItemPrefixGenerator() : mFirst(true) {} |
| |
| private: |
| bool mFirst; |
| |
| template <typename Stream> |
| friend Stream &operator<<(Stream &out, CommaSeparatedListItemPrefixGenerator &gen); |
| }; |
| |
| template <typename Stream> |
| Stream &operator<<(Stream &out, CommaSeparatedListItemPrefixGenerator &gen) |
| { |
| if (gen.mFirst) |
| { |
| gen.mFirst = false; |
| } |
| else |
| { |
| out << ", "; |
| } |
| return out; |
| } |
| |
| } // namespace |
| |
| TOutputGLSLBase::TOutputGLSLBase(TInfoSinkBase &objSink, |
| ShHashFunction64 hashFunction, |
| NameMap &nameMap, |
| TSymbolTable *symbolTable, |
| sh::GLenum shaderType, |
| int shaderVersion, |
| ShShaderOutput output, |
| ShCompileOptions compileOptions) |
| : TIntermTraverser(true, true, true, symbolTable), |
| mObjSink(objSink), |
| mDeclaringVariable(false), |
| mHashFunction(hashFunction), |
| mNameMap(nameMap), |
| 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::writePreciseQualifier(const TType &type) |
| { |
| TInfoSinkBase &out = objSink(); |
| out << "precise "; |
| } |
| |
| 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::writeFunctionTriplet(Visit visit, |
| const ImmutableString &functionName, |
| bool useEmulatedFunction) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (visit == PreVisit) |
| { |
| if (useEmulatedFunction) |
| { |
| BuiltInFunctionEmulator::WriteEmulatedFunctionName(out, functionName.data()); |
| } |
| else |
| { |
| out << functionName; |
| } |
| out << "("; |
| } |
| else |
| { |
| writeTriplet(visit, nullptr, ", ", ")"); |
| } |
| } |
| |
| // Outputs what goes inside layout(), except for location and binding qualifiers, as they are |
| // handled differently between GL GLSL and Vulkan GLSL. |
| std::string TOutputGLSLBase::getCommonLayoutQualifiers(TIntermSymbol *variable) |
| { |
| std::ostringstream out; |
| CommaSeparatedListItemPrefixGenerator listItemPrefix; |
| |
| const TType &type = variable->getType(); |
| const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier(); |
| |
| if (type.getQualifier() == EvqFragmentOut || type.getQualifier() == EvqVertexIn || |
| IsVarying(type.getQualifier())) |
| { |
| if (type.getQualifier() == EvqFragmentOut && layoutQualifier.index >= 0) |
| { |
| out << listItemPrefix << "index = " << layoutQualifier.index; |
| } |
| } |
| |
| if (type.getQualifier() == EvqFragmentOut) |
| { |
| if (layoutQualifier.yuv == true) |
| { |
| out << listItemPrefix << "yuv"; |
| } |
| } |
| |
| if (IsImage(type.getBasicType())) |
| { |
| if (layoutQualifier.imageInternalFormat != EiifUnspecified) |
| { |
| ASSERT(type.getQualifier() == EvqTemporary || type.getQualifier() == EvqUniform); |
| out << listItemPrefix |
| << getImageInternalFormatString(layoutQualifier.imageInternalFormat); |
| } |
| } |
| |
| if (IsAtomicCounter(type.getBasicType())) |
| { |
| out << listItemPrefix << "offset = " << layoutQualifier.offset; |
| } |
| |
| return out.str(); |
| } |
| |
| // Outputs memory qualifiers applied to images, buffers and its fields, as well as image function |
| // arguments. |
| std::string TOutputGLSLBase::getMemoryQualifiers(const TType &type) |
| { |
| std::ostringstream out; |
| |
| const TMemoryQualifier &memoryQualifier = type.getMemoryQualifier(); |
| if (memoryQualifier.readonly) |
| { |
| out << "readonly "; |
| } |
| |
| if (memoryQualifier.writeonly) |
| { |
| out << "writeonly "; |
| } |
| |
| if (memoryQualifier.coherent) |
| { |
| out << "coherent "; |
| } |
| |
| if (memoryQualifier.restrictQualifier) |
| { |
| out << "restrict "; |
| } |
| |
| if (memoryQualifier.volatileQualifier) |
| { |
| out << "volatile "; |
| } |
| |
| return out.str(); |
| } |
| |
| void TOutputGLSLBase::writeLayoutQualifier(TIntermSymbol *variable) |
| { |
| const TType &type = variable->getType(); |
| |
| if (!NeedsToWriteLayoutQualifier(type)) |
| { |
| return; |
| } |
| |
| if (type.getBasicType() == EbtInterfaceBlock) |
| { |
| declareInterfaceBlockLayout(type); |
| return; |
| } |
| |
| TInfoSinkBase &out = objSink(); |
| const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier(); |
| out << "layout("; |
| |
| CommaSeparatedListItemPrefixGenerator listItemPrefix; |
| |
| if (type.getQualifier() == EvqFragmentOut || type.getQualifier() == EvqVertexIn || |
| IsVarying(type.getQualifier())) |
| { |
| if (layoutQualifier.location >= 0) |
| { |
| out << listItemPrefix << "location = " << layoutQualifier.location; |
| } |
| } |
| |
| if (IsOpaqueType(type.getBasicType())) |
| { |
| if (layoutQualifier.binding >= 0) |
| { |
| out << listItemPrefix << "binding = " << layoutQualifier.binding; |
| } |
| } |
| |
| std::string otherQualifiers = getCommonLayoutQualifiers(variable); |
| if (!otherQualifiers.empty()) |
| { |
| out << listItemPrefix << otherQualifiers; |
| } |
| |
| out << ") "; |
| } |
| |
| void TOutputGLSLBase::writeFieldLayoutQualifier(const TField *field) |
| { |
| if (!field->type()->isMatrix() && !field->type()->isStructureContainingMatrices()) |
| { |
| return; |
| } |
| |
| TInfoSinkBase &out = objSink(); |
| |
| out << "layout("; |
| switch (field->type()->getLayoutQualifier().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::writeQualifier(TQualifier qualifier, const TType &type, const TSymbol *symbol) |
| { |
| const char *result = mapQualifierToString(qualifier); |
| if (result && result[0] != '\0') |
| { |
| objSink() << result << " "; |
| } |
| |
| objSink() << getMemoryQualifiers(type); |
| } |
| |
| 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, |
| const TSymbol *symbol, |
| bool isFunctionArgument) |
| { |
| TQualifier qualifier = type.getQualifier(); |
| TInfoSinkBase &out = objSink(); |
| if (type.isInvariant()) |
| { |
| writeInvariantQualifier(type); |
| } |
| if (type.isPrecise()) |
| { |
| writePreciseQualifier(type); |
| } |
| if (qualifier != EvqTemporary && qualifier != EvqGlobal) |
| { |
| writeQualifier(qualifier, type, symbol); |
| } |
| if (isFunctionArgument) |
| { |
| // Function arguments are the only place (other than image/SSBO/field declaration) where |
| // memory qualifiers can appear. |
| out << getMemoryQualifiers(type); |
| } |
| |
| // Declare the struct. |
| if (type.isStructSpecifier()) |
| { |
| const TStructure *structure = type.getStruct(); |
| |
| declareStruct(structure); |
| } |
| else if (type.getBasicType() == EbtInterfaceBlock) |
| { |
| declareInterfaceBlock(type); |
| } |
| else |
| { |
| if (writeVariablePrecision(type.getPrecision())) |
| out << " "; |
| out << getTypeName(type); |
| } |
| } |
| |
| void TOutputGLSLBase::writeFunctionParameters(const TFunction *func) |
| { |
| TInfoSinkBase &out = objSink(); |
| size_t paramCount = func->getParamCount(); |
| for (size_t i = 0; i < paramCount; ++i) |
| { |
| const TVariable *param = func->getParam(i); |
| const TType &type = param->getType(); |
| writeVariableType(type, param, true); |
| |
| if (param->symbolType() != SymbolType::Empty) |
| out << " " << hashName(param); |
| if (type.isArray()) |
| out << ArrayString(type); |
| |
| // Put a comma if this is not the last argument. |
| if (i != paramCount - 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(structure) << "("; |
| |
| 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 << ArrayString(type); |
| out << "("; |
| } |
| else |
| { |
| out << getTypeName(type) << "("; |
| } |
| } |
| else |
| { |
| writeTriplet(visit, nullptr, ", ", ")"); |
| } |
| } |
| |
| void TOutputGLSLBase::visitSymbol(TIntermSymbol *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| out << hashName(&node->variable()); |
| |
| if (mDeclaringVariable && node->getType().isArray()) |
| out << ArrayString(node->getType()); |
| } |
| |
| void TOutputGLSLBase::visitConstantUnion(TIntermConstantUnion *node) |
| { |
| writeConstantUnion(node->getType(), node->getConstantValue()); |
| } |
| |
| 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. |
| mDeclaringVariable = 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: |
| case EOpIndexIndirect: |
| 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)]; |
| |
| out << hashFieldName(field); |
| 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)]; |
| out << hashFieldName(field); |
| 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) |
| { |
| const char *preString = ""; |
| const char *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 EOpArrayLength: |
| preString = "(("; |
| postString = ").length())"; |
| break; |
| |
| default: |
| writeFunctionTriplet(visit, node->getFunction()->name(), |
| node->getUseEmulatedFunction()); |
| return true; |
| } |
| |
| writeTriplet(visit, preString, nullptr, postString); |
| |
| 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) |
| { |
| ASSERT(node->getStatementList()); |
| writeTriplet(visit, "switch (", ") ", nullptr); |
| // The curly braces get written when visiting the statementList aggregate |
| 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 (getCurrentTraversalDepth() > 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 (getCurrentTraversalDepth() > 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::visitGlobalQualifierDeclaration(Visit visit, |
| TIntermGlobalQualifierDeclaration *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| ASSERT(visit == PreVisit); |
| const TIntermSymbol *symbol = node->getSymbol(); |
| out << (node->isPrecise() ? "precise " : "invariant ") << hashName(&symbol->variable()); |
| return false; |
| } |
| |
| void TOutputGLSLBase::visitFunctionPrototype(TIntermFunctionPrototype *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| const TType &type = node->getType(); |
| writeVariableType(type, node->getFunction(), false); |
| if (type.isArray()) |
| out << ArrayString(type); |
| |
| out << " " << hashFunctionNameIfNeeded(node->getFunction()); |
| |
| out << "("; |
| writeFunctionParameters(node->getFunction()); |
| out << ")"; |
| } |
| |
| bool TOutputGLSLBase::visitAggregate(Visit visit, TIntermAggregate *node) |
| { |
| bool visitChildren = true; |
| if (node->getOp() == EOpConstruct) |
| { |
| writeConstructorTriplet(visit, node->getType()); |
| } |
| else |
| { |
| // Function call. |
| ImmutableString functionName = node->getFunction()->name(); |
| if (visit == PreVisit) |
| { |
| if (node->getOp() == EOpCallFunctionInAST || |
| node->getOp() == EOpCallInternalRawFunction) |
| { |
| functionName = hashFunctionNameIfNeeded(node->getFunction()); |
| } |
| else |
| { |
| functionName = |
| translateTextureFunction(node->getFunction()->name(), mCompileOptions); |
| } |
| } |
| writeFunctionTriplet(visit, functionName, node->getUseEmulatedFunction()); |
| } |
| return visitChildren; |
| } |
| |
| bool TOutputGLSLBase::visitDeclaration(Visit visit, TIntermDeclaration *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| // Variable declaration. |
| if (visit == PreVisit) |
| { |
| const TIntermSequence &sequence = *(node->getSequence()); |
| TIntermTyped *variable = sequence.front()->getAsTyped(); |
| TIntermSymbol *symbolNode = variable->getAsSymbolNode(); |
| if (symbolNode == nullptr) |
| { |
| ASSERT(variable->getAsBinaryNode() && |
| variable->getAsBinaryNode()->getOp() == EOpInitialize); |
| symbolNode = variable->getAsBinaryNode()->getLeft()->getAsSymbolNode(); |
| } |
| ASSERT(symbolNode); |
| |
| if (symbolNode->getName() != "gl_ClipDistance" && |
| symbolNode->getName() != "gl_CullDistance") |
| { |
| // gl_Clip/CullDistance re-declaration doesn't need layout. |
| writeLayoutQualifier(symbolNode); |
| } |
| |
| // Note: the TIntermDeclaration type is used for variable declaration instead of the |
| // TIntermSymbol one. The TIntermDeclaration type includes precision promotions from the |
| // right hand side that the symbol may be missing. This is an inconsistency in the tree |
| // that is too ingrained. |
| writeVariableType(variable->getType(), &symbolNode->variable(), false); |
| if (symbolNode->variable().symbolType() != SymbolType::Empty) |
| { |
| out << " "; |
| } |
| mDeclaringVariable = true; |
| } |
| else if (visit == InVisit) |
| { |
| UNREACHABLE(); |
| } |
| else |
| { |
| mDeclaringVariable = 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. |
| } |
| } |
| |
| void TOutputGLSLBase::visitPreprocessorDirective(TIntermPreprocessorDirective *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << "\n"; |
| |
| switch (node->getDirective()) |
| { |
| case PreprocessorDirective::Define: |
| out << "#define"; |
| break; |
| case PreprocessorDirective::Endif: |
| out << "#endif"; |
| break; |
| case PreprocessorDirective::If: |
| out << "#if"; |
| break; |
| case PreprocessorDirective::Ifdef: |
| out << "#ifdef"; |
| break; |
| |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| if (!node->getCommand().empty()) |
| { |
| out << " " << node->getCommand(); |
| } |
| |
| out << "\n"; |
| } |
| |
| ImmutableString TOutputGLSLBase::getTypeName(const TType &type) |
| { |
| if (type.getBasicType() == EbtSamplerVideoWEBGL) |
| { |
| // TODO(http://anglebug.com/3889): translate SamplerVideoWEBGL into different token |
| // when necessary (e.g. on Android devices) |
| return ImmutableString("sampler2D"); |
| } |
| |
| return GetTypeName(type, mHashFunction, &mNameMap); |
| } |
| |
| ImmutableString TOutputGLSLBase::hashName(const TSymbol *symbol) |
| { |
| return HashName(symbol, mHashFunction, &mNameMap); |
| } |
| |
| ImmutableString TOutputGLSLBase::hashFieldName(const TField *field) |
| { |
| ASSERT(field->symbolType() != SymbolType::Empty); |
| if (field->symbolType() == SymbolType::UserDefined) |
| { |
| return HashName(field->name(), mHashFunction, &mNameMap); |
| } |
| |
| return field->name(); |
| } |
| |
| ImmutableString TOutputGLSLBase::hashFunctionNameIfNeeded(const TFunction *func) |
| { |
| if (func->isMain()) |
| { |
| return func->name(); |
| } |
| else |
| { |
| return hashName(func); |
| } |
| } |
| |
| void TOutputGLSLBase::declareStruct(const TStructure *structure) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << "struct "; |
| |
| if (structure->symbolType() != SymbolType::Empty) |
| { |
| out << hashName(structure) << " "; |
| } |
| out << "{\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()) << " " << hashFieldName(field); |
| if (field->type()->isArray()) |
| out << ArrayString(*field->type()); |
| out << ";\n"; |
| } |
| out << "}"; |
| } |
| |
| void TOutputGLSLBase::declareInterfaceBlockLayout(const TType &type) |
| { |
| // 4.4.5 Uniform and Shader Storage Block Layout Qualifiers in GLSL 4.5 spec. |
| // Layout qualifiers can be used for uniform and shader storage blocks, |
| // but not for non-block uniform declarations. |
| if (IsShaderIoBlock(type.getQualifier())) |
| { |
| return; |
| } |
| |
| const TInterfaceBlock *interfaceBlock = type.getInterfaceBlock(); |
| 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; |
| |
| case EbsStd430: |
| out << "std430"; |
| break; |
| |
| default: |
| UNREACHABLE(); |
| break; |
| } |
| |
| if (interfaceBlock->blockBinding() >= 0) |
| { |
| out << ", "; |
| out << "binding = " << interfaceBlock->blockBinding(); |
| } |
| |
| out << ") "; |
| } |
| |
| const char *getVariableInterpolation(TQualifier qualifier) |
| { |
| switch (qualifier) |
| { |
| case EvqSmoothOut: |
| return "smooth out "; |
| case EvqFlatOut: |
| return "flat out "; |
| case EvqNoPerspectiveOut: |
| return "noperspective out "; |
| case EvqCentroidOut: |
| return "centroid out "; |
| case EvqSmoothIn: |
| return "smooth in "; |
| case EvqFlatIn: |
| return "flat in "; |
| case EvqNoPerspectiveIn: |
| return "noperspective in "; |
| case EvqCentroidIn: |
| return "centroid in "; |
| default: |
| break; |
| } |
| return nullptr; |
| } |
| |
| void TOutputGLSLBase::declareInterfaceBlock(const TType &type) |
| { |
| const TInterfaceBlock *interfaceBlock = type.getInterfaceBlock(); |
| TInfoSinkBase &out = objSink(); |
| |
| out << hashName(interfaceBlock) << "{\n"; |
| const TFieldList &fields = interfaceBlock->fields(); |
| for (const TField *field : fields) |
| { |
| if (!IsShaderIoBlock(type.getQualifier()) && type.getQualifier() != EvqPatchIn && |
| type.getQualifier() != EvqPatchOut) |
| { |
| writeFieldLayoutQualifier(field); |
| } |
| |
| const TType &fieldType = *field->type(); |
| |
| out << getMemoryQualifiers(fieldType); |
| if (writeVariablePrecision(fieldType.getPrecision())) |
| out << " "; |
| if (fieldType.isInvariant()) |
| { |
| writeInvariantQualifier(fieldType); |
| } |
| |
| const char *qualifier = getVariableInterpolation(fieldType.getQualifier()); |
| if (qualifier != nullptr) |
| out << qualifier; |
| |
| out << getTypeName(fieldType) << " " << hashFieldName(field); |
| |
| if (fieldType.isArray()) |
| out << ArrayString(fieldType); |
| out << ";\n"; |
| } |
| out << "}"; |
| } |
| |
| void WritePragma(TInfoSinkBase &out, ShCompileOptions compileOptions, const TPragma &pragma) |
| { |
| if ((compileOptions & SH_FLATTEN_PRAGMA_STDGL_INVARIANT_ALL) == 0) |
| { |
| if (pragma.stdgl.invariantAll) |
| out << "#pragma STDGL invariant(all)\n"; |
| } |
| } |
| |
| void WriteGeometryShaderLayoutQualifiers(TInfoSinkBase &out, |
| sh::TLayoutPrimitiveType inputPrimitive, |
| int invocations, |
| sh::TLayoutPrimitiveType outputPrimitive, |
| int maxVertices) |
| { |
| // Omit 'invocations = 1' |
| if (inputPrimitive != EptUndefined || invocations > 1) |
| { |
| out << "layout ("; |
| |
| if (inputPrimitive != EptUndefined) |
| { |
| out << getGeometryShaderPrimitiveTypeString(inputPrimitive); |
| } |
| |
| if (invocations > 1) |
| { |
| if (inputPrimitive != EptUndefined) |
| { |
| out << ", "; |
| } |
| out << "invocations = " << invocations; |
| } |
| out << ") in;\n"; |
| } |
| |
| if (outputPrimitive != EptUndefined || maxVertices != -1) |
| { |
| out << "layout ("; |
| |
| if (outputPrimitive != EptUndefined) |
| { |
| out << getGeometryShaderPrimitiveTypeString(outputPrimitive); |
| } |
| |
| if (maxVertices != -1) |
| { |
| if (outputPrimitive != EptUndefined) |
| { |
| out << ", "; |
| } |
| out << "max_vertices = " << maxVertices; |
| } |
| out << ") out;\n"; |
| } |
| } |
| |
| void WriteTessControlShaderLayoutQualifiers(TInfoSinkBase &out, int inputVertices) |
| { |
| if (inputVertices != 0) |
| { |
| out << "layout (vertices = " << inputVertices << ") out;\n"; |
| } |
| } |
| |
| void WriteTessEvaluationShaderLayoutQualifiers(TInfoSinkBase &out, |
| sh::TLayoutTessEvaluationType inputPrimitive, |
| sh::TLayoutTessEvaluationType inputVertexSpacing, |
| sh::TLayoutTessEvaluationType inputOrdering, |
| sh::TLayoutTessEvaluationType inputPoint) |
| { |
| if (inputPrimitive != EtetUndefined) |
| { |
| out << "layout ("; |
| out << getTessEvaluationShaderTypeString(inputPrimitive); |
| if (inputVertexSpacing != EtetUndefined) |
| { |
| out << ", " << getTessEvaluationShaderTypeString(inputVertexSpacing); |
| } |
| if (inputOrdering != EtetUndefined) |
| { |
| out << ", " << getTessEvaluationShaderTypeString(inputOrdering); |
| } |
| if (inputPoint != EtetUndefined) |
| { |
| out << ", " << getTessEvaluationShaderTypeString(inputPoint); |
| } |
| out << ") in;\n"; |
| } |
| } |
| |
| // 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 true; |
| } |
| |
| const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier(); |
| |
| if ((type.getQualifier() == EvqFragmentOut || type.getQualifier() == EvqVertexIn || |
| IsVarying(type.getQualifier())) && |
| 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; |
| } |
| |
| void EmitEarlyFragmentTestsGLSL(const TCompiler &compiler, TInfoSinkBase &sink) |
| { |
| if (compiler.isEarlyFragmentTestsSpecified() || compiler.isEarlyFragmentTestsOptimized()) |
| { |
| sink << "layout (early_fragment_tests) in;\n"; |
| } |
| } |
| |
| void EmitWorkGroupSizeGLSL(const TCompiler &compiler, TInfoSinkBase &sink) |
| { |
| if (compiler.isComputeShaderLocalSizeDeclared()) |
| { |
| const sh::WorkGroupSize &localSize = compiler.getComputeShaderLocalSize(); |
| sink << "layout (local_size_x=" << localSize[0] << ", local_size_y=" << localSize[1] |
| << ", local_size_z=" << localSize[2] << ") in;\n"; |
| } |
| } |
| |
| void EmitMultiviewGLSL(const TCompiler &compiler, |
| const ShCompileOptions &compileOptions, |
| const TExtension extension, |
| const TBehavior behavior, |
| TInfoSinkBase &sink) |
| { |
| ASSERT(behavior != EBhUndefined); |
| if (behavior == EBhDisable) |
| return; |
| |
| const bool isVertexShader = (compiler.getShaderType() == GL_VERTEX_SHADER); |
| if ((compileOptions & SH_INITIALIZE_BUILTINS_FOR_INSTANCED_MULTIVIEW) != 0) |
| { |
| // Emit ARB_shader_viewport_layer_array/NV_viewport_array2 in a vertex shader if the |
| // SH_SELECT_VIEW_IN_NV_GLSL_VERTEX_SHADER option is set and the |
| // OVR_multiview(2) extension is requested. |
| if (isVertexShader && (compileOptions & SH_SELECT_VIEW_IN_NV_GLSL_VERTEX_SHADER) != 0) |
| { |
| sink << "#if defined(GL_ARB_shader_viewport_layer_array)\n" |
| << "#extension GL_ARB_shader_viewport_layer_array : require\n" |
| << "#elif defined(GL_NV_viewport_array2)\n" |
| << "#extension GL_NV_viewport_array2 : require\n" |
| << "#endif\n"; |
| } |
| } |
| else |
| { |
| sink << "#extension GL_OVR_multiview"; |
| if (extension == TExtension::OVR_multiview2) |
| { |
| sink << "2"; |
| } |
| sink << " : " << GetBehaviorString(behavior) << "\n"; |
| |
| const auto &numViews = compiler.getNumViews(); |
| if (isVertexShader && numViews != -1) |
| { |
| sink << "layout(num_views=" << numViews << ") in;\n"; |
| } |
| } |
| } |
| |
| } // namespace sh |
