| // |
| // Copyright (c) 2002-2013 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 "compiler/translator/compilerdebug.h" |
| |
| #include <cfloat> |
| |
| namespace |
| { |
| TString arrayBrackets(const TType &type) |
| { |
| ASSERT(type.isArray()); |
| TInfoSinkBase out; |
| out << "[" << type.getArraySize() << "]"; |
| return TString(out.c_str()); |
| } |
| |
| bool isSingleStatement(TIntermNode *node) |
| { |
| if (const TIntermAggregate *aggregate = node->getAsAggregate()) |
| { |
| return (aggregate->getOp() != EOpFunction) && |
| (aggregate->getOp() != EOpSequence); |
| } |
| else if (const TIntermSelection *selection = node->getAsSelectionNode()) |
| { |
| // Ternary operators are usually part of an assignment operator. |
| // This handles those rare cases in which they are all by themselves. |
| return selection->usesTernaryOperator(); |
| } |
| else if (node->getAsLoopNode()) |
| { |
| return false; |
| } |
| return true; |
| } |
| } // namespace |
| |
| TOutputGLSLBase::TOutputGLSLBase(TInfoSinkBase &objSink, |
| ShArrayIndexClampingStrategy clampingStrategy, |
| ShHashFunction64 hashFunction, |
| NameMap &nameMap, |
| TSymbolTable &symbolTable, |
| int shaderVersion) |
| : TIntermTraverser(true, true, true), |
| mObjSink(objSink), |
| mDeclaringVariables(false), |
| mClampingStrategy(clampingStrategy), |
| mHashFunction(hashFunction), |
| mNameMap(nameMap), |
| mSymbolTable(symbolTable), |
| mShaderVersion(shaderVersion) |
| { |
| // Set up global scope. |
| mDeclaredStructs.push_back(ScopedDeclaredStructs()); |
| } |
| |
| 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, const char *preStr, bool useEmulatedFunction) |
| { |
| TString preString = useEmulatedFunction ? |
| BuiltInFunctionEmulator::GetEmulatedFunctionName(preStr) : preStr; |
| writeTriplet(visit, preString.c_str(), ", ", ")"); |
| } |
| |
| void TOutputGLSLBase::writeVariableType(const TType &type) |
| { |
| TInfoSinkBase &out = objSink(); |
| TQualifier qualifier = type.getQualifier(); |
| // TODO(alokp): Validate qualifier for variable declarations. |
| if (qualifier != EvqTemporary && qualifier != EvqGlobal) |
| out << type.getQualifierString() << " "; |
| // Declare the struct if we have not done so already. |
| if (type.getBasicType() == EbtStruct && !structDeclared(type.getStruct())) |
| { |
| declareStruct(type.getStruct()); |
| mDeclaredStructs[mDeclaredStructs.size() - 1].push_back(type.getStruct()); |
| } |
| 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 != NULL); |
| |
| const TType &type = arg->getType(); |
| writeVariableType(type); |
| |
| const TString &name = arg->getSymbol(); |
| if (!name.empty()) |
| out << " " << hashName(name); |
| if (type.isArray()) |
| out << arrayBrackets(type); |
| |
| // Put a comma if this is not the last argument. |
| if (iter != args.end() - 1) |
| out << ", "; |
| } |
| } |
| |
| const ConstantUnion *TOutputGLSLBase::writeConstantUnion( |
| const TType &type, const ConstantUnion *pConstUnion) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| if (type.getBasicType() == EbtStruct) |
| { |
| const TStructure *structure = type.getStruct(); |
| out << hashName(structure->name()) << "("; |
| |
| const TFieldList &fields = structure->fields(); |
| for (size_t i = 0; i < fields.size(); ++i) |
| { |
| const TType *fieldType = fields[i]->type(); |
| ASSERT(fieldType != NULL); |
| 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: |
| out << std::min(FLT_MAX, std::max(-FLT_MAX, pConstUnion->getFConst())); |
| break; |
| case EbtInt: |
| out << pConstUnion->getIConst(); |
| break; |
| case EbtBool: |
| out << pConstUnion->getBConst(); |
| break; |
| default: UNREACHABLE(); |
| } |
| if (i != size - 1) |
| out << ", "; |
| } |
| if (writeType) |
| out << ")"; |
| } |
| return pConstUnion; |
| } |
| |
| void TOutputGLSLBase::visitSymbol(TIntermSymbol *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (mLoopUnrollStack.needsToReplaceSymbolWithValue(node)) |
| out << mLoopUnrollStack.getLoopIndexValue(node); |
| else |
| out << hashVariableName(node->getSymbol()); |
| |
| if (mDeclaringVariables && node->getType().isArray()) |
| out << arrayBrackets(node->getType()); |
| } |
| |
| void TOutputGLSLBase::visitConstantUnion(TIntermConstantUnion *node) |
| { |
| writeConstantUnion(node->getType(), node->getUnionArrayPointer()); |
| } |
| |
| bool TOutputGLSLBase::visitBinary(Visit visit, TIntermBinary *node) |
| { |
| bool visitChildren = true; |
| TInfoSinkBase &out = objSink(); |
| switch (node->getOp()) |
| { |
| 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; |
| // Notice the fall-through. |
| case EOpMulAssign: |
| case EOpVectorTimesMatrixAssign: |
| case EOpVectorTimesScalarAssign: |
| case EOpMatrixTimesScalarAssign: |
| case EOpMatrixTimesMatrixAssign: |
| writeTriplet(visit, "(", " *= ", ")"); |
| break; |
| |
| case EOpIndexDirect: |
| writeTriplet(visit, NULL, "[", "]"); |
| 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 = 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, NULL, "[", "]"); |
| } |
| 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(fieldName); |
| |
| out << fieldName; |
| visitChildren = false; |
| } |
| break; |
| case EOpVectorSwizzle: |
| if (visit == InVisit) |
| { |
| out << "."; |
| TIntermAggregate *rightChild = node->getRight()->getAsAggregate(); |
| TIntermSequence &sequence = rightChild->getSequence(); |
| for (TIntermSequence::iterator sit = sequence.begin(); sit != sequence.end(); ++sit) |
| { |
| TIntermConstantUnion *element = (*sit)->getAsConstantUnion(); |
| ASSERT(element->getBasicType() == EbtInt); |
| ASSERT(element->getNominalSize() == 1); |
| const ConstantUnion& data = element->getUnionArrayPointer()[0]; |
| ASSERT(data.getType() == EbtInt); |
| switch (data.getIConst()) |
| { |
| case 0: |
| out << "x"; |
| break; |
| case 1: |
| out << "y"; |
| break; |
| case 2: |
| out << "z"; |
| break; |
| case 3: |
| out << "w"; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| } |
| visitChildren = false; |
| } |
| break; |
| |
| case EOpAdd: |
| writeTriplet(visit, "(", " + ", ")"); |
| break; |
| case EOpSub: |
| writeTriplet(visit, "(", " - ", ")"); |
| break; |
| case EOpMul: |
| writeTriplet(visit, "(", " * ", ")"); |
| break; |
| case EOpDiv: |
| writeTriplet(visit, "(", " / ", ")"); |
| break; |
| case EOpMod: |
| UNIMPLEMENTED(); |
| 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 EOpVectorLogicalNot: preString = "not("; break; |
| case EOpLogicalNot: preString = "(!"; break; |
| |
| case EOpPostIncrement: preString = "("; postString = "++)"; break; |
| case EOpPostDecrement: preString = "("; postString = "--)"; break; |
| case EOpPreIncrement: preString = "(++"; break; |
| case EOpPreDecrement: preString = "(--"; break; |
| |
| case EOpConvIntToBool: |
| case EOpConvFloatToBool: |
| switch (node->getOperand()->getType().getNominalSize()) |
| { |
| case 1: |
| preString = "bool("; |
| break; |
| case 2: |
| preString = "bvec2("; |
| break; |
| case 3: |
| preString = "bvec3("; |
| break; |
| case 4: |
| preString = "bvec4("; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| break; |
| case EOpConvBoolToFloat: |
| case EOpConvIntToFloat: |
| switch (node->getOperand()->getType().getNominalSize()) |
| { |
| case 1: |
| preString = "float("; |
| break; |
| case 2: |
| preString = "vec2("; |
| break; |
| case 3: |
| preString = "vec3("; |
| break; |
| case 4: |
| preString = "vec4("; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| break; |
| case EOpConvFloatToInt: |
| case EOpConvBoolToInt: |
| switch (node->getOperand()->getType().getNominalSize()) |
| { |
| case 1: |
| preString = "int("; |
| break; |
| case 2: |
| preString = "ivec2("; |
| break; |
| case 3: |
| preString = "ivec3("; |
| break; |
| case 4: |
| preString = "ivec4("; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| break; |
| |
| case EOpRadians: |
| preString = "radians("; |
| break; |
| case EOpDegrees: |
| preString = "degrees("; |
| break; |
| case EOpSin: |
| preString = "sin("; |
| break; |
| case EOpCos: |
| preString = "cos("; |
| break; |
| case EOpTan: |
| preString = "tan("; |
| break; |
| case EOpAsin: |
| preString = "asin("; |
| break; |
| case EOpAcos: |
| preString = "acos("; |
| break; |
| case EOpAtan: |
| preString = "atan("; |
| break; |
| |
| case EOpExp: |
| preString = "exp("; |
| break; |
| case EOpLog: |
| preString = "log("; |
| break; |
| case EOpExp2: |
| preString = "exp2("; |
| break; |
| case EOpLog2: |
| preString = "log2("; |
| break; |
| case EOpSqrt: |
| preString = "sqrt("; |
| break; |
| case EOpInverseSqrt: |
| preString = "inversesqrt("; |
| break; |
| |
| case EOpAbs: |
| preString = "abs("; |
| break; |
| case EOpSign: |
| preString = "sign("; |
| break; |
| case EOpFloor: |
| preString = "floor("; |
| break; |
| case EOpCeil: |
| preString = "ceil("; |
| break; |
| case EOpFract: |
| preString = "fract("; |
| break; |
| |
| case EOpLength: |
| preString = "length("; |
| break; |
| case EOpNormalize: |
| preString = "normalize("; |
| break; |
| |
| case EOpDFdx: |
| preString = "dFdx("; |
| break; |
| case EOpDFdy: |
| preString = "dFdy("; |
| break; |
| case EOpFwidth: |
| preString = "fwidth("; |
| break; |
| |
| case EOpAny: |
| preString = "any("; |
| break; |
| case EOpAll: |
| preString = "all("; |
| break; |
| |
| default: |
| UNREACHABLE(); |
| } |
| |
| if (visit == PreVisit && node->getUseEmulatedFunction()) |
| preString = BuiltInFunctionEmulator::GetEmulatedFunctionName(preString); |
| writeTriplet(visit, preString.c_str(), NULL, postString.c_str()); |
| |
| return true; |
| } |
| |
| bool TOutputGLSLBase::visitSelection(Visit visit, TIntermSelection *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| if (node->usesTernaryOperator()) |
| { |
| // 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->getTrueBlock()->traverse(this); |
| out << ") : ("; |
| node->getFalseBlock()->traverse(this); |
| out << "))"; |
| } |
| else |
| { |
| out << "if ("; |
| node->getCondition()->traverse(this); |
| out << ")\n"; |
| |
| incrementDepth(node); |
| visitCodeBlock(node->getTrueBlock()); |
| |
| if (node->getFalseBlock()) |
| { |
| out << "else\n"; |
| visitCodeBlock(node->getFalseBlock()); |
| } |
| decrementDepth(); |
| } |
| return false; |
| } |
| |
| bool TOutputGLSLBase::visitAggregate(Visit visit, TIntermAggregate *node) |
| { |
| bool visitChildren = true; |
| TInfoSinkBase &out = objSink(); |
| TString preString; |
| bool useEmulatedFunction = (visit == PreVisit && node->getUseEmulatedFunction()); |
| switch (node->getOp()) |
| { |
| case EOpSequence: |
| // Scope the sequences except when at the global scope. |
| if (depth > 0) |
| { |
| out << "{\n"; |
| pushDeclaredStructsScope(); |
| } |
| |
| incrementDepth(node); |
| for (TIntermSequence::const_iterator iter = node->getSequence().begin(); |
| iter != node->getSequence().end(); ++iter) |
| { |
| TIntermNode *node = *iter; |
| ASSERT(node != NULL); |
| node->traverse(this); |
| |
| if (isSingleStatement(node)) |
| out << ";\n"; |
| } |
| decrementDepth(); |
| |
| // Scope the sequences except when at the global scope. |
| if (depth > 0) |
| { |
| popDeclaredStructsScope(); |
| out << "}\n"; |
| } |
| visitChildren = false; |
| break; |
| case EOpPrototype: |
| // Function declaration. |
| ASSERT(visit == PreVisit); |
| writeVariableType(node->getType()); |
| out << " " << hashName(node->getName()); |
| |
| out << "("; |
| writeFunctionParameters(node->getSequence()); |
| out << ")"; |
| |
| visitChildren = false; |
| break; |
| case EOpFunction: { |
| // Function definition. |
| ASSERT(visit == PreVisit); |
| writeVariableType(node->getType()); |
| out << " " << hashFunctionName(node->getName()); |
| |
| incrementDepth(node); |
| // Function definition node contains one or two children nodes |
| // representing function parameters and function body. The latter |
| // is not present in case of empty function bodies. |
| const TIntermSequence &sequence = node->getSequence(); |
| ASSERT((sequence.size() == 1) || (sequence.size() == 2)); |
| TIntermSequence::const_iterator seqIter = sequence.begin(); |
| |
| // Traverse function parameters. |
| TIntermAggregate *params = (*seqIter)->getAsAggregate(); |
| ASSERT(params != NULL); |
| ASSERT(params->getOp() == EOpParameters); |
| params->traverse(this); |
| |
| // Traverse function body. |
| TIntermAggregate *body = ++seqIter != sequence.end() ? |
| (*seqIter)->getAsAggregate() : NULL; |
| visitCodeBlock(body); |
| decrementDepth(); |
| |
| // Fully processed; no need to visit children. |
| visitChildren = false; |
| break; |
| } |
| case EOpFunctionCall: |
| // Function call. |
| if (visit == PreVisit) |
| out << hashFunctionName(node->getName()) << "("; |
| else if (visit == InVisit) |
| out << ", "; |
| else |
| out << ")"; |
| break; |
| case EOpParameters: |
| // Function parameters. |
| ASSERT(visit == PreVisit); |
| out << "("; |
| writeFunctionParameters(node->getSequence()); |
| out << ")"; |
| visitChildren = false; |
| break; |
| case EOpDeclaration: |
| // Variable declaration. |
| if (visit == PreVisit) |
| { |
| const TIntermSequence &sequence = node->getSequence(); |
| const TIntermTyped *variable = sequence.front()->getAsTyped(); |
| writeVariableType(variable->getType()); |
| out << " "; |
| mDeclaringVariables = true; |
| } |
| else if (visit == InVisit) |
| { |
| out << ", "; |
| mDeclaringVariables = true; |
| } |
| else |
| { |
| mDeclaringVariables = false; |
| } |
| break; |
| case EOpConstructFloat: |
| writeTriplet(visit, "float(", NULL, ")"); |
| break; |
| case EOpConstructVec2: |
| writeBuiltInFunctionTriplet(visit, "vec2(", false); |
| break; |
| case EOpConstructVec3: |
| writeBuiltInFunctionTriplet(visit, "vec3(", false); |
| break; |
| case EOpConstructVec4: |
| writeBuiltInFunctionTriplet(visit, "vec4(", false); |
| break; |
| case EOpConstructBool: |
| writeTriplet(visit, "bool(", NULL, ")"); |
| break; |
| case EOpConstructBVec2: |
| writeBuiltInFunctionTriplet(visit, "bvec2(", false); |
| break; |
| case EOpConstructBVec3: |
| writeBuiltInFunctionTriplet(visit, "bvec3(", false); |
| break; |
| case EOpConstructBVec4: |
| writeBuiltInFunctionTriplet(visit, "bvec4(", false); |
| break; |
| case EOpConstructInt: |
| writeTriplet(visit, "int(", NULL, ")"); |
| break; |
| case EOpConstructIVec2: |
| writeBuiltInFunctionTriplet(visit, "ivec2(", false); |
| break; |
| case EOpConstructIVec3: |
| writeBuiltInFunctionTriplet(visit, "ivec3(", false); |
| break; |
| case EOpConstructIVec4: |
| writeBuiltInFunctionTriplet(visit, "ivec4(", false); |
| break; |
| case EOpConstructMat2: |
| writeBuiltInFunctionTriplet(visit, "mat2(", false); |
| break; |
| case EOpConstructMat3: |
| writeBuiltInFunctionTriplet(visit, "mat3(", false); |
| break; |
| case EOpConstructMat4: |
| writeBuiltInFunctionTriplet(visit, "mat4(", false); |
| break; |
| case EOpConstructStruct: |
| if (visit == PreVisit) |
| { |
| const TType &type = node->getType(); |
| ASSERT(type.getBasicType() == EbtStruct); |
| out << hashName(type.getStruct()->name()) << "("; |
| } |
| else if (visit == InVisit) |
| { |
| out << ", "; |
| } |
| else |
| { |
| out << ")"; |
| } |
| break; |
| |
| case EOpLessThan: |
| writeBuiltInFunctionTriplet(visit, "lessThan(", useEmulatedFunction); |
| break; |
| case EOpGreaterThan: |
| writeBuiltInFunctionTriplet(visit, "greaterThan(", useEmulatedFunction); |
| break; |
| case EOpLessThanEqual: |
| writeBuiltInFunctionTriplet(visit, "lessThanEqual(", useEmulatedFunction); |
| break; |
| case EOpGreaterThanEqual: |
| writeBuiltInFunctionTriplet(visit, "greaterThanEqual(", useEmulatedFunction); |
| break; |
| case EOpVectorEqual: |
| writeBuiltInFunctionTriplet(visit, "equal(", useEmulatedFunction); |
| break; |
| case EOpVectorNotEqual: |
| writeBuiltInFunctionTriplet(visit, "notEqual(", useEmulatedFunction); |
| break; |
| case EOpComma: |
| writeTriplet(visit, NULL, ", ", NULL); |
| break; |
| |
| case EOpMod: |
| writeBuiltInFunctionTriplet(visit, "mod(", useEmulatedFunction); |
| break; |
| case EOpPow: |
| writeBuiltInFunctionTriplet(visit, "pow(", useEmulatedFunction); |
| break; |
| case EOpAtan: |
| writeBuiltInFunctionTriplet(visit, "atan(", useEmulatedFunction); |
| break; |
| case EOpMin: |
| writeBuiltInFunctionTriplet(visit, "min(", useEmulatedFunction); |
| break; |
| case EOpMax: |
| writeBuiltInFunctionTriplet(visit, "max(", useEmulatedFunction); |
| break; |
| case EOpClamp: |
| writeBuiltInFunctionTriplet(visit, "clamp(", useEmulatedFunction); |
| break; |
| case EOpMix: |
| writeBuiltInFunctionTriplet(visit, "mix(", useEmulatedFunction); |
| break; |
| case EOpStep: |
| writeBuiltInFunctionTriplet(visit, "step(", useEmulatedFunction); |
| break; |
| case EOpSmoothStep: |
| writeBuiltInFunctionTriplet(visit, "smoothstep(", useEmulatedFunction); |
| break; |
| case EOpDistance: |
| writeBuiltInFunctionTriplet(visit, "distance(", useEmulatedFunction); |
| break; |
| case EOpDot: |
| writeBuiltInFunctionTriplet(visit, "dot(", useEmulatedFunction); |
| break; |
| case EOpCross: |
| writeBuiltInFunctionTriplet(visit, "cross(", useEmulatedFunction); |
| break; |
| case EOpFaceForward: |
| writeBuiltInFunctionTriplet(visit, "faceforward(", useEmulatedFunction); |
| break; |
| case EOpReflect: |
| writeBuiltInFunctionTriplet(visit, "reflect(", useEmulatedFunction); |
| break; |
| case EOpRefract: |
| writeBuiltInFunctionTriplet(visit, "refract(", useEmulatedFunction); |
| break; |
| case EOpMul: |
| writeBuiltInFunctionTriplet(visit, "matrixCompMult(", useEmulatedFunction); |
| break; |
| |
| default: |
| UNREACHABLE(); |
| } |
| return visitChildren; |
| } |
| |
| bool TOutputGLSLBase::visitLoop(Visit visit, TIntermLoop *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| incrementDepth(node); |
| // Loop header. |
| TLoopType loopType = node->getType(); |
| if (loopType == ELoopFor) // for loop |
| { |
| if (!node->getUnrollFlag()) |
| { |
| 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"; |
| } |
| else |
| { |
| // Need to put a one-iteration loop here to handle break. |
| TIntermSequence &declSeq = |
| node->getInit()->getAsAggregate()->getSequence(); |
| TIntermSymbol *indexSymbol = |
| declSeq[0]->getAsBinaryNode()->getLeft()->getAsSymbolNode(); |
| TString name = hashVariableName(indexSymbol->getSymbol()); |
| out << "for (int " << name << " = 0; " |
| << name << " < 1; " |
| << "++" << name << ")\n"; |
| } |
| } |
| else if (loopType == ELoopWhile) // while loop |
| { |
| out << "while ("; |
| ASSERT(node->getCondition() != NULL); |
| node->getCondition()->traverse(this); |
| out << ")\n"; |
| } |
| else // do-while loop |
| { |
| ASSERT(loopType == ELoopDoWhile); |
| out << "do\n"; |
| } |
| |
| // Loop body. |
| if (node->getUnrollFlag()) |
| { |
| out << "{\n"; |
| mLoopUnrollStack.push(node); |
| while (mLoopUnrollStack.satisfiesLoopCondition()) |
| { |
| visitCodeBlock(node->getBody()); |
| mLoopUnrollStack.step(); |
| } |
| mLoopUnrollStack.pop(); |
| out << "}\n"; |
| } |
| else |
| { |
| visitCodeBlock(node->getBody()); |
| } |
| |
| // Loop footer. |
| if (loopType == ELoopDoWhile) // do-while loop |
| { |
| out << "while ("; |
| ASSERT(node->getCondition() != NULL); |
| node->getCondition()->traverse(this); |
| out << ");\n"; |
| } |
| decrementDepth(); |
| |
| // 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", NULL, NULL); |
| break; |
| case EOpBreak: |
| writeTriplet(visit, "break", NULL, NULL); |
| break; |
| case EOpContinue: |
| writeTriplet(visit, "continue", NULL, NULL); |
| break; |
| case EOpReturn: |
| writeTriplet(visit, "return ", NULL, NULL); |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| return true; |
| } |
| |
| void TOutputGLSLBase::visitCodeBlock(TIntermNode *node) |
| { |
| TInfoSinkBase &out = objSink(); |
| if (node != NULL) |
| { |
| 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) |
| { |
| TInfoSinkBase out; |
| if (type.isMatrix()) |
| { |
| out << "mat"; |
| out << type.getNominalSize(); |
| } |
| else if (type.isVector()) |
| { |
| switch (type.getBasicType()) |
| { |
| case EbtFloat: |
| out << "vec"; |
| break; |
| case EbtInt: |
| out << "ivec"; |
| break; |
| case EbtBool: |
| out << "bvec"; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| out << type.getNominalSize(); |
| } |
| else |
| { |
| if (type.getBasicType() == EbtStruct) |
| out << hashName(type.getStruct()->name()); |
| else |
| out << type.getBasicString(); |
| } |
| return TString(out.c_str()); |
| } |
| |
| TString TOutputGLSLBase::hashName(const TString &name) |
| { |
| if (mHashFunction == NULL || name.empty()) |
| return name; |
| NameMap::const_iterator it = mNameMap.find(name.c_str()); |
| if (it != mNameMap.end()) |
| return it->second.c_str(); |
| TString hashedName = TIntermTraverser::hash(name, mHashFunction); |
| mNameMap[name.c_str()] = hashedName.c_str(); |
| return hashedName; |
| } |
| |
| TString TOutputGLSLBase::hashVariableName(const TString &name) |
| { |
| if (mSymbolTable.findBuiltIn(name, mShaderVersion) != NULL) |
| return name; |
| return hashName(name); |
| } |
| |
| TString TOutputGLSLBase::hashFunctionName(const TString &mangled_name) |
| { |
| TString name = TFunction::unmangleName(mangled_name); |
| if (mSymbolTable.findBuiltIn(mangled_name, mShaderVersion) != NULL || name == "main") |
| return translateTextureFunction(name); |
| return hashName(name); |
| } |
| |
| bool TOutputGLSLBase::structDeclared(const TStructure *structure) const |
| { |
| ASSERT(structure); |
| ASSERT(mDeclaredStructs.size() > 0); |
| for (size_t ii = mDeclaredStructs.size(); ii > 0; --ii) |
| { |
| const ScopedDeclaredStructs &scope = mDeclaredStructs[ii - 1]; |
| for (size_t jj = 0; jj < scope.size(); ++jj) |
| { |
| if (scope[jj]->equals(*structure)) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void TOutputGLSLBase::declareStruct(const TStructure *structure) |
| { |
| TInfoSinkBase &out = objSink(); |
| |
| out << "struct " << hashName(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(field->name()); |
| if (field->type()->isArray()) |
| out << arrayBrackets(*field->type()); |
| out << ";\n"; |
| } |
| out << "}"; |
| } |
| |
| void TOutputGLSLBase::pushDeclaredStructsScope() |
| { |
| mDeclaredStructs.push_back(ScopedDeclaredStructs()); |
| } |
| |
| void TOutputGLSLBase::popDeclaredStructsScope() |
| { |
| // We should never pop the global scope. |
| ASSERT(mDeclaredStructs.size() >= 2); |
| mDeclaredStructs.pop_back(); |
| } |