void writeFuncCall( const TString &name, TIntermAggregate *node, TGlslOutputTraverser* goit, bool bGenMatrix = false )
{
TIntermSequence::iterator sit;
TIntermSequence &sequence = node->getSequence();
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
current->beginStatement();
if ( bGenMatrix )
{
if ( node->isMatrix () )
{
out << "xll_";
current->addLibFunction ( node->getOp() );
}
}
out << name << "(";
for (sit = sequence.begin(); sit != sequence.end(); ++sit)
{
if (sit !=sequence.begin())
out << ", ";
(*sit)->traverse(goit);
}
out << ")";
}
static bool sortFunctionsTopologically (std::vector<GlslFunction*>& dst, const std::vector<GlslFunction*>& src)
{
dst.clear();
// Build function use counts.
FunctionUseCounts useCounts;
for (std::vector<GlslFunction*>::const_iterator funcIter = src.begin(); funcIter != src.end(); ++funcIter)
useCounts[(*funcIter)->getMangledName()] = 0;
for (std::vector<GlslFunction*>::const_iterator funcIter = src.begin(); funcIter != src.end(); ++funcIter)
{
std::set<std::string> calledNames = (*funcIter)->getCalledFunctions();
for (std::set<std::string>::const_iterator callIter = calledNames.begin(); callIter != calledNames.end(); ++callIter)
useCounts[*callIter] += 1;
}
std::vector<GlslFunction*> liveSet;
// Init live set with functions that have use count 0 (should be only main())
for (std::vector<GlslFunction*>::const_iterator funcIter = src.begin(); funcIter != src.end(); ++funcIter)
{
if (useCounts[(*funcIter)->getMangledName()] == 0)
liveSet.push_back(*funcIter);
}
// Process until live set is empty.
while (!liveSet.empty())
{
GlslFunction* curFunction = liveSet.back();
liveSet.pop_back();
dst.push_back(curFunction);
// Decrement use counts and add to live set if reaches zero.
std::set<std::string> calledNames = curFunction->getCalledFunctions();
for (std::set<std::string>::const_iterator callIter = calledNames.begin(); callIter != calledNames.end(); ++callIter)
{
int& useCount = useCounts[*callIter];
useCount -= 1;
if (useCount == 0)
{
GlslFunction* newLiveFunc = resolveFunctionByMangledName(src, *callIter);
if (!newLiveFunc)
return false; // Not found - why?
liveSet.push_back(newLiveFunc);
}
}
}
// If dependency graph contains cycles, some functions will never end up in live set and from there
// to sorted list. This checks if sort succeeded.
return dst.size() == src.size();
}
bool TGlslOutputTraverser::traverseLoop( bool preVisit, TIntermLoop *node, TIntermTraverser *it )
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
current->beginStatement();
if ( node->getTerminal())
{
// Process for loop, initial statement was promoted outside the loop
out << "for ( ; ";
node->getTest()->traverse(goit);
out << "; ";
node->getTerminal()->traverse(goit);
out << ") ";
current->beginBlock();
if (node->getBody())
node->getBody()->traverse(goit);
current->endBlock();
}
else
{
if ( node->testFirst())
{
// Process while loop
out << "while ( ";
node->getTest()->traverse(goit);
out << " ) ";
current->beginBlock();
if (node->getBody())
node->getBody()->traverse(goit);
current->endBlock();
}
else
{
// Process do loop
out << "do ";
current->beginBlock();
if (node->getBody())
node->getBody()->traverse(goit);
current->endBlock();
current->indent();
out << "while ( ";
node->getTest()->traverse(goit);
out << " )\n";
}
}
return false;
}
void setupUnaryBuiltInFuncCall( const TString &name, TIntermUnary *node, TString &opStr, bool &funcStyle, bool &prefix,
TGlslOutputTraverser* goit )
{
GlslFunction *current = goit->current;
funcStyle = true;
prefix = true;
if ( node->isMatrix() )
{
current->addLibFunction( node->getOp() );
opStr = "xll_" + name;
}
else
{
opStr = name;
}
}
void TGlslOutputTraverser::traverseConstantUnion( TIntermConstant *node, TIntermTraverser *it )
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
EGlslSymbolType type = translateType( node->getTypePointer());
GlslStruct *str = 0;
current->beginStatement();
if (type == EgstStruct)
{
str = goit->createStructFromType( node->getTypePointer());
}
writeConstantConstructor (out, type, goit->m_UsePrecision?node->getPrecision():EbpUndefined, node, str);
}
void TGlslOutputTraverser::traverseParameterSymbol(TIntermSymbol *node, TIntermTraverser *it)
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
int array = node->getTypePointer()->isArray() ? node->getTypePointer()->getArraySize() : 0;
const char* semantic = "";
if (node->getInfo())
semantic = node->getInfo()->getSemantic().c_str();
GlslSymbol * sym = new GlslSymbol( node->getSymbol().c_str(), semantic, node->getId(),
translateType(node->getTypePointer()), goit->m_UsePrecision?node->getPrecision():EbpUndefined, translateQualifier(node->getQualifier()), array);
current->addParameter(sym);
if (sym->getType() == EgstStruct)
{
GlslStruct *s = goit->createStructFromType( node->getTypePointer());
sym->setStruct(s);
}
}
bool TGlslOutputTraverser::traverseBranch( bool preVisit, TIntermBranch *node, TIntermTraverser *it )
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
current->beginStatement();
switch (node->getFlowOp())
{
case EOpKill: out << "discard"; break;
case EOpBreak: out << "break"; break;
case EOpContinue: out << "continue"; break;
case EOpReturn: out << "return "; break;
default: assert(0); break;
}
if (node->getExpression())
{
node->getExpression()->traverse(it);
}
return false;
}
void TGlslOutputTraverser::traverseSymbol(TIntermSymbol *node, TIntermTraverser *it)
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
current->beginStatement();
if ( ! current->hasSymbol( node->getId()))
{
//check to see if it is a global we can share
if ( goit->global->hasSymbol( node->getId()))
{
current->addSymbol( &goit->global->getSymbol( node->getId()));
}
else
{
int array = node->getTypePointer()->isArray() ? node->getTypePointer()->getArraySize() : 0;
const char* semantic = "";
if (node->getInfo())
semantic = node->getInfo()->getSemantic().c_str();
GlslSymbol * sym = new GlslSymbol( node->getSymbol().c_str(), semantic, node->getId(),
translateType(node->getTypePointer()), goit->m_UsePrecision?node->getPrecision():EbpUndefined, translateQualifier(node->getQualifier()), array);
sym->setIsGlobal(node->isGlobal());
current->addSymbol(sym);
if (sym->getType() == EgstStruct)
{
GlslStruct *s = goit->createStructFromType( node->getTypePointer());
sym->setStruct(s);
}
}
}
// If we're at the global scope, emit the non-mutable names of uniforms.
bool globalScope = current == goit->global;
out << current->getSymbol(node->getId()).getName(!globalScope);
}
bool TGlslOutputTraverser::traverseUnary( bool preVisit, TIntermUnary *node, TIntermTraverser *it )
{
TString op("??");
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
bool funcStyle = false;
bool prefix = true;
char zero[] = "0";
current->beginStatement();
switch (node->getOp())
{
case EOpNegative: op = "-"; funcStyle = false; prefix = true; break;
case EOpVectorLogicalNot:
case EOpLogicalNot: op = "!"; funcStyle = false; prefix = true; break;
case EOpBitwiseNot: op = "-"; funcStyle = false; prefix = true; break;
case EOpPostIncrement: op = "++"; funcStyle = false; prefix = false; break;
case EOpPostDecrement: op = "--"; funcStyle = false; prefix = false; break;
case EOpPreIncrement: op = "++"; funcStyle = false; prefix = true; break;
case EOpPreDecrement: op = "--"; funcStyle = false; prefix = true; break;
case EOpConvIntToBool:
case EOpConvFloatToBool:
op = "bool";
if ( node->getTypePointer()->getNominalSize() > 1)
{
zero[0] += node->getTypePointer()->getNominalSize();
op = TString("bvec") + zero;
}
funcStyle = true;
prefix = true;
break;
case EOpConvBoolToFloat:
case EOpConvIntToFloat:
op = "float";
if ( node->getTypePointer()->getNominalSize() > 1)
{
zero[0] += node->getTypePointer()->getNominalSize();
op = TString("vec") + zero;
}
funcStyle = true;
prefix = true;
break;
case EOpConvFloatToInt:
case EOpConvBoolToInt:
op = "int";
if ( node->getTypePointer()->getNominalSize() > 1)
{
zero[0] += node->getTypePointer()->getNominalSize();
op = TString("ivec") + zero;
}
funcStyle = true;
prefix = true;
break;
case EOpRadians: setupUnaryBuiltInFuncCall ( "radians", node, op, funcStyle, prefix, goit ); break;
case EOpDegrees: setupUnaryBuiltInFuncCall ( "degrees", node, op, funcStyle, prefix, goit ); break;
case EOpSin: setupUnaryBuiltInFuncCall ( "sin", node, op, funcStyle, prefix, goit ); break;
case EOpCos: setupUnaryBuiltInFuncCall ( "cos", node, op, funcStyle, prefix, goit ); break;
case EOpTan: setupUnaryBuiltInFuncCall ( "tan", node, op, funcStyle, prefix, goit ); break;
case EOpAsin: setupUnaryBuiltInFuncCall ( "asin", node, op, funcStyle, prefix, goit ); break;
case EOpAcos: setupUnaryBuiltInFuncCall ( "acos", node, op, funcStyle, prefix, goit ); break;
case EOpAtan: setupUnaryBuiltInFuncCall ( "atan", node, op, funcStyle, prefix, goit ); break;
case EOpExp: setupUnaryBuiltInFuncCall ( "exp", node, op, funcStyle, prefix, goit ); break;
case EOpLog: setupUnaryBuiltInFuncCall ( "log", node, op, funcStyle, prefix, goit ); break;
case EOpExp2: setupUnaryBuiltInFuncCall ( "exp2", node, op, funcStyle, prefix, goit ); break;
case EOpLog2: setupUnaryBuiltInFuncCall ( "log2", node, op, funcStyle, prefix, goit ); break;
case EOpSqrt: setupUnaryBuiltInFuncCall ( "sqrt", node, op, funcStyle, prefix, goit ); break;
case EOpInverseSqrt: setupUnaryBuiltInFuncCall ( "inversesqrt", node, op, funcStyle, prefix, goit ); break;
case EOpAbs: setupUnaryBuiltInFuncCall ( "abs", node, op, funcStyle, prefix, goit ); break;
case EOpSign: setupUnaryBuiltInFuncCall ( "sign", node, op, funcStyle, prefix, goit ); break;
case EOpFloor: setupUnaryBuiltInFuncCall ( "floor", node, op, funcStyle, prefix, goit ); break;
case EOpCeil: setupUnaryBuiltInFuncCall ( "ceil", node, op, funcStyle, prefix, goit ); break;
case EOpFract: setupUnaryBuiltInFuncCall ( "fract", node, op, funcStyle, prefix, goit ); break;
case EOpLength: op = "length"; funcStyle = true; prefix = true; break;
case EOpNormalize: op = "normalize"; funcStyle = true; prefix = true; break;
case EOpDPdx:
current->addLibFunction(EOpDPdx);
op = "xll_dFdx";
funcStyle = true;
prefix = true;
break;
case EOpDPdy:
current->addLibFunction(EOpDPdy);
op = "xll_dFdy";
funcStyle = true;
prefix = true;
break;
case EOpFwidth:
current->addLibFunction(EOpFwidth);
op = "xll_fwidth";
funcStyle = true;
prefix = true;
break;
case EOpFclip:
current->addLibFunction(EOpFclip);
op = "xll_clip";
funcStyle = true;
prefix = true;
break;
case EOpAny: op = "any"; funcStyle = true; prefix = true; break;
case EOpAll: op = "all"; funcStyle = true; prefix = true; break;
//these are HLSL specific and they map to the lib functions
case EOpSaturate:
current->addLibFunction(EOpSaturate);
op = "xll_saturate";
funcStyle = true;
prefix = true;
break;
case EOpTranspose:
current->addLibFunction(EOpTranspose);
op = "xll_transpose";
funcStyle = true;
prefix = true;
break;
case EOpDeterminant:
current->addLibFunction(EOpDeterminant);
op = "xll_determinant";
funcStyle = true;
prefix = true;
break;
case EOpLog10:
current->addLibFunction(EOpLog10);
op = "xll_log10";
funcStyle = true;
prefix = true;
break;
case EOpD3DCOLORtoUBYTE4:
current->addLibFunction(EOpD3DCOLORtoUBYTE4);
op = "xll_D3DCOLORtoUBYTE4";
funcStyle = true;
prefix = true;
break;
default:
assert(0);
}
if (funcStyle)
out << op << '(';
else
{
out << '(';
if (prefix)
out << op;
}
node->getOperand()->traverse(goit);
if (! funcStyle && !prefix)
out << op;
out << ')';
return false;
}
bool TGlslOutputTraverser::traverseBinary( bool preVisit, TIntermBinary *node, TIntermTraverser *it )
{
TString op = "??";
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
bool infix = true;
bool assign = false;
bool needsParens = true;
switch (node->getOp())
{
case EOpAssign: op = "="; infix = true; needsParens = false; break;
case EOpAddAssign: op = "+="; infix = true; needsParens = false; break;
case EOpSubAssign: op = "-="; infix = true; needsParens = false; break;
case EOpMulAssign: op = "*="; infix = true; needsParens = false; break;
case EOpVectorTimesMatrixAssign: op = "*="; infix = true; needsParens = false; break;
case EOpVectorTimesScalarAssign: op = "*="; infix = true; needsParens = false; break;
case EOpMatrixTimesScalarAssign: op = "*="; infix = true; needsParens = false; break;
case EOpMatrixTimesMatrixAssign: op = "*="; infix = true; needsParens = false; break;
case EOpDivAssign: op = "/="; infix = true; needsParens = false; break;
case EOpModAssign: op = "%="; infix = true; needsParens = false; break;
case EOpAndAssign: op = "&="; infix = true; needsParens = false; break;
case EOpInclusiveOrAssign: op = "|="; infix = true; needsParens = false; break;
case EOpExclusiveOrAssign: op = "^="; infix = true; needsParens = false; break;
case EOpLeftShiftAssign: op = "<<="; infix = true; needsParens = false; break;
case EOpRightShiftAssign: op = "??="; infix = true; needsParens = false; break;
case EOpIndexDirect:
{
TIntermTyped *left = node->getLeft();
TIntermTyped *right = node->getRight();
assert( left && right);
current->beginStatement();
if (Check2DMatrixIndex (goit, out, left, right))
return false;
if (left->isMatrix() && !left->isArray())
{
if (right->getAsConstant())
{
current->addLibFunction (EOpMatrixIndex);
out << "xll_matrixindex (";
left->traverse(goit);
out << ", ";
right->traverse(goit);
out << ")";
return false;
}
else
{
current->addLibFunction (EOpTranspose);
current->addLibFunction (EOpMatrixIndex);
current->addLibFunction (EOpMatrixIndexDynamic);
out << "xll_matrixindexdynamic (";
left->traverse(goit);
out << ", ";
right->traverse(goit);
out << ")";
return false;
}
}
left->traverse(goit);
// Special code for handling a vector component select (this improves readability)
if (left->isVector() && !left->isArray() && right->getAsConstant())
{
char swiz[] = "xyzw";
goit->visitConstantUnion = TGlslOutputTraverser::traverseImmediateConstant;
goit->generatingCode = false;
right->traverse(goit);
assert( goit->indexList.size() == 1);
assert( goit->indexList[0] < 4);
out << "." << swiz[goit->indexList[0]];
goit->indexList.clear();
goit->visitConstantUnion = TGlslOutputTraverser::traverseConstantUnion;
goit->generatingCode = true;
}
else
{
out << "[";
right->traverse(goit);
out << "]";
}
return false;
}
case EOpIndexIndirect:
{
TIntermTyped *left = node->getLeft();
TIntermTyped *right = node->getRight();
current->beginStatement();
if (Check2DMatrixIndex (goit, out, left, right))
return false;
if (left && right && left->isMatrix() && !left->isArray())
{
if (right->getAsConstant())
{
current->addLibFunction (EOpMatrixIndex);
out << "xll_matrixindex (";
left->traverse(goit);
out << ", ";
right->traverse(goit);
out << ")";
return false;
}
else
{
current->addLibFunction (EOpTranspose);
current->addLibFunction (EOpMatrixIndex);
current->addLibFunction (EOpMatrixIndexDynamic);
out << "xll_matrixindexdynamic (";
left->traverse(goit);
out << ", ";
right->traverse(goit);
out << ")";
return false;
}
}
if (left)
left->traverse(goit);
out << "[";
if (right)
right->traverse(goit);
out << "]";
return false;
}
case EOpIndexDirectStruct:
{
current->beginStatement();
GlslStruct *s = goit->createStructFromType(node->getLeft()->getTypePointer());
if (node->getLeft())
node->getLeft()->traverse(goit);
// The right child is always an offset into the struct, switch to get an
// immediate constant, and put it back afterwords
goit->visitConstantUnion = TGlslOutputTraverser::traverseImmediateConstant;
goit->generatingCode = false;
if (node->getRight())
{
node->getRight()->traverse(goit);
assert( goit->indexList.size() == 1);
assert( goit->indexList[0] < s->memberCount());
out << "." << s->getMember(goit->indexList[0]).name;
}
goit->indexList.clear();
goit->visitConstantUnion = TGlslOutputTraverser::traverseConstantUnion;
goit->generatingCode = true;
}
return false;
case EOpVectorSwizzle:
current->beginStatement();
if (node->getLeft())
node->getLeft()->traverse(goit);
goit->visitConstantUnion = TGlslOutputTraverser::traverseImmediateConstant;
goit->generatingCode = false;
if (node->getRight())
{
node->getRight()->traverse(goit);
assert( goit->indexList.size() <= 4);
out << '.';
const char fields[] = "xyzw";
for (int ii = 0; ii < (int)goit->indexList.size(); ii++)
{
int val = goit->indexList[ii];
assert( val >= 0);
assert( val < 4);
out << fields[val];
}
}
goit->indexList.clear();
goit->visitConstantUnion = TGlslOutputTraverser::traverseConstantUnion;
goit->generatingCode = true;
return false;
case EOpMatrixSwizzle:
// This presently only works for swizzles as rhs operators
if (node->getRight())
{
goit->visitConstantUnion = TGlslOutputTraverser::traverseImmediateConstant;
goit->generatingCode = false;
node->getRight()->traverse(goit);
goit->visitConstantUnion = TGlslOutputTraverser::traverseConstantUnion;
goit->generatingCode = true;
std::vector<int> elements = goit->indexList;
goit->indexList.clear();
if (elements.size() > 4 || elements.size() < 1) {
goit->infoSink.info << "Matrix swizzle operations can must contain at least 1 and at most 4 element selectors.";
return true;
}
unsigned column[4] = {0}, row[4] = {0};
for (unsigned i = 0; i != elements.size(); ++i)
{
unsigned val = elements[i];
column[i] = val % 4;
row[i] = val / 4;
}
bool sameColumn = true;
for (unsigned i = 1; i != elements.size(); ++i)
sameColumn &= column[i] == column[i-1];
static const char* fields = "xyzw";
if (sameColumn)
{
//select column, then swizzle row
if (node->getLeft())
node->getLeft()->traverse(goit);
out << "[" << column[0] << "].";
for (unsigned i = 0; i < elements.size(); ++i)
out << fields[row[i]];
}
else
{
// Insert constructor, and dereference individually
// Might need to account for different types here
assert( elements.size() != 1); //should have hit same collumn case
out << "vec" << elements.size() << "(";
if (node->getLeft())
node->getLeft()->traverse(goit);
out << "[" << column[0] << "].";
out << fields[row[0]];
for (unsigned i = 1; i < elements.size(); ++i)
{
out << ", ";
if (node->getLeft())
node->getLeft()->traverse(goit);
out << "[" << column[i] << "].";
out << fields[row[i]];
}
out << ")";
}
}
return false;
case EOpAdd: op = "+"; infix = true; break;
case EOpSub: op = "-"; infix = true; break;
case EOpMul: op = "*"; infix = true; break;
case EOpDiv: op = "/"; infix = true; break;
case EOpMod: op = "mod"; infix = false; break;
case EOpRightShift: op = "<<"; infix = true;
break;
case EOpLeftShift: op = ">>"; infix = true; break;
case EOpAnd: op = "&"; infix = true; break;
case EOpInclusiveOr: op = "|"; infix = true; break;
case EOpExclusiveOr: op = "^"; infix = true; break;
case EOpEqual:
writeComparison ( "==", "equal", node, goit );
return false;
case EOpNotEqual:
writeComparison ( "!=", "notEqual", node, goit );
return false;
case EOpLessThan:
writeComparison ( "<", "lessThan", node, goit );
return false;
case EOpGreaterThan:
writeComparison ( ">", "greaterThan", node, goit );
return false;
case EOpLessThanEqual:
writeComparison ( "<=", "lessThanEqual", node, goit );
return false;
case EOpGreaterThanEqual:
writeComparison ( ">=", "greaterThanEqual", node, goit );
return false;
case EOpVectorTimesScalar: op = "*"; infix = true; break;
case EOpVectorTimesMatrix: op = "*"; infix = true; break;
case EOpMatrixTimesVector: op = "*"; infix = true; break;
case EOpMatrixTimesScalar: op = "*"; infix = true; break;
case EOpMatrixTimesMatrix: op = "*"; infix = true; break;
case EOpLogicalOr: op = "||"; infix = true; break;
case EOpLogicalXor: op = "^^"; infix = true; break;
case EOpLogicalAnd: op = "&&"; infix = true; break;
default: assert(0);
}
current->beginStatement();
if (infix)
{
// special case for swizzled matrix assignment
if (node->getOp() == EOpAssign && node->getLeft() && node->getRight()) {
TIntermBinary* lval = node->getLeft()->getAsBinaryNode();
if (lval && lval->getOp() == EOpMatrixSwizzle) {
static const char* vec_swizzles = "xyzw";
TIntermTyped* rval = node->getRight();
TIntermTyped* lexp = lval->getLeft();
goit->visitConstantUnion = TGlslOutputTraverser::traverseImmediateConstant;
goit->generatingCode = false;
lval->getRight()->traverse(goit);
goit->visitConstantUnion = TGlslOutputTraverser::traverseConstantUnion;
goit->generatingCode = true;
std::vector<int> swizzles = goit->indexList;
goit->indexList.clear();
char temp_rval[128];
unsigned n_swizzles = swizzles.size();
if (n_swizzles > 1) {
snprintf(temp_rval, 128, "xlat_swiztemp%d", goit->swizzleAssignTempCounter++);
current->beginStatement();
out << "vec" << n_swizzles << " " << temp_rval << " = ";
rval->traverse(goit);
current->endStatement();
}
for (unsigned i = 0; i != n_swizzles; ++i) {
unsigned col = swizzles[i] / 4;
unsigned row = swizzles[i] % 4;
current->beginStatement();
lexp->traverse(goit);
out << "[" << row << "][" << col << "] = ";
if (n_swizzles > 1)
out << temp_rval << "." << vec_swizzles[i];
else
rval->traverse(goit);
current->endStatement();
}
return false;
}
}
if (needsParens)
out << '(';
if (node->getLeft())
node->getLeft()->traverse(goit);
out << ' ' << op << ' ';
if (node->getRight())
node->getRight()->traverse(goit);
if (needsParens)
out << ')';
}
else
{
if (assign)
{
// Need to traverse the left child twice to allow for the assign and the op
// This is OK, because we know it is an lvalue
if (node->getLeft())
node->getLeft()->traverse(goit);
out << " = " << op << '(';
if (node->getLeft())
node->getLeft()->traverse(goit);
out << ", ";
if (node->getRight())
node->getRight()->traverse(goit);
out << ')';
}
else
{
out << op << '(';
if (node->getLeft())
node->getLeft()->traverse(goit);
out << ", ";
if (node->getRight())
node->getRight()->traverse(goit);
out << ')';
}
}
return false;
}
bool TGlslOutputTraverser::traverseDeclaration(bool preVisit, TIntermDeclaration* decl, TIntermTraverser* it) {
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
EGlslSymbolType symbol_type = translateType(decl->getTypePointer());
TType& type = *decl->getTypePointer();
bool emit_osx10_6_arrays = goit->m_EmitSnowLeopardCompatibleArrayInitializers
&& decl->containsArrayInitialization();
if (emit_osx10_6_arrays) {
assert(decl->isSingleInitialization() && "Emission of multiple in-line array declarations isn't supported when running in OS X 10.6 compatible mode.");
current->indent(out);
out << "#if defined(OSX_SNOW_LEOPARD)" << std::endl;
current->increaseDepth();
TQualifier q = type.getQualifier();
if (q == EvqConst)
q = EvqTemporary;
current->beginStatement();
if (q != EvqTemporary && q != EvqGlobal)
out << type.getQualifierString() << " ";
TIntermBinary* assign = decl->getDeclaration()->getAsBinaryNode();
TIntermSymbol* sym = assign->getLeft()->getAsSymbolNode();
TIntermSequence& init = assign->getRight()->getAsAggregate()->getSequence();
writeType(out, symbol_type, NULL, goit->m_UsePrecision ? decl->getPrecision() : EbpUndefined);
out << "[" << type.getArraySize() << "] " << sym->getSymbol();
current->endStatement();
unsigned n_vals = init.size();
for (unsigned i = 0; i != n_vals; ++i) {
current->beginStatement();
sym->traverse(goit);
out << "[" << i << "]" << " = ";
init[i]->traverse(goit);
current->endStatement();
}
current->decreaseDepth();
current->indent(out);
out << "#else" << std::endl;
current->increaseDepth();
}
current->beginStatement();
if (type.getQualifier() != EvqTemporary && type.getQualifier() != EvqGlobal)
out << type.getQualifierString() << " ";
if (type.getBasicType() == EbtStruct)
out << type.getTypeName();
else
writeType(out, symbol_type, NULL, goit->m_UsePrecision ? decl->getPrecision() : EbpUndefined);
if (type.isArray())
out << "[" << type.getArraySize() << "]";
out << " ";
decl->getDeclaration()->traverse(goit);
current->endStatement();
if (emit_osx10_6_arrays) {
current->decreaseDepth();
current->indent(out);
out << "#endif" << std::endl;
}
return false;
}
bool TGlslOutputTraverser::traverseAggregate( bool preVisit, TIntermAggregate *node, TIntermTraverser *it )
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
int argCount = (int) node->getSequence().size();
if (node->getOp() == EOpNull)
{
goit->infoSink.info << "node is still EOpNull!\n";
return true;
}
switch (node->getOp())
{
case EOpSequence:
if (goit->generatingCode)
{
goit->outputLineDirective (node->getLine());
TIntermSequence::iterator sit;
TIntermSequence &sequence = node->getSequence();
for (sit = sequence.begin(); sit != sequence.end(); ++sit)
{
goit->outputLineDirective((*sit)->getLine());
(*sit)->traverse(it);
//out << ";\n";
current->endStatement();
}
}
else
{
TIntermSequence::iterator sit;
TIntermSequence &sequence = node->getSequence();
for (sit = sequence.begin(); sit != sequence.end(); ++sit)
{
(*sit)->traverse(it);
}
}
return false;
case EOpFunction:
{
GlslFunction *func = new GlslFunction( node->getPlainName().c_str(), node->getName().c_str(),
translateType(node->getTypePointer()), goit->m_UsePrecision?node->getPrecision():EbpUndefined,
node->getSemantic().c_str(), node->getLine());
if (func->getReturnType() == EgstStruct)
{
GlslStruct *s = goit->createStructFromType( node->getTypePointer());
func->setStruct(s);
}
goit->functionList.push_back( func);
goit->current = func;
goit->current->beginBlock( false);
TIntermSequence::iterator sit;
TIntermSequence &sequence = node->getSequence();
for (sit = sequence.begin(); sit != sequence.end(); ++sit)
{
(*sit)->traverse(it);
}
goit->current->endBlock();
goit->current = goit->global;
return false;
}
case EOpParameters:
it->visitSymbol = traverseParameterSymbol;
{
TIntermSequence::iterator sit;
TIntermSequence &sequence = node->getSequence();
for (sit = sequence.begin(); sit != sequence.end(); ++sit)
(*sit)->traverse(it);
}
it->visitSymbol = traverseSymbol;
return false;
case EOpConstructFloat: writeFuncCall( "float", node, goit); return false;
case EOpConstructVec2: writeFuncCall( "vec2", node, goit); return false;
case EOpConstructVec3: writeFuncCall( "vec3", node, goit); return false;
case EOpConstructVec4: writeFuncCall( "vec4", node, goit); return false;
case EOpConstructBool: writeFuncCall( "bool", node, goit); return false;
case EOpConstructBVec2: writeFuncCall( "bvec2", node, goit); return false;
case EOpConstructBVec3: writeFuncCall( "bvec3", node, goit); return false;
case EOpConstructBVec4: writeFuncCall( "bvec4", node, goit); return false;
case EOpConstructInt: writeFuncCall( "int", node, goit); return false;
case EOpConstructIVec2: writeFuncCall( "ivec2", node, goit); return false;
case EOpConstructIVec3: writeFuncCall( "ivec3", node, goit); return false;
case EOpConstructIVec4: writeFuncCall( "ivec4", node, goit); return false;
case EOpConstructMat2FromMat:
case EOpConstructMat2: writeFuncCall( "mat2", node, goit); return false;
case EOpConstructMat3FromMat:
case EOpConstructMat3: writeFuncCall( "mat3", node, goit); return false;
case EOpConstructMat4: writeFuncCall( "mat4", node, goit); return false;
case EOpConstructStruct: writeFuncCall( node->getTypePointer()->getTypeName(), node, goit); return false;
case EOpConstructArray: writeFuncCall( buildArrayConstructorString(*node->getTypePointer()), node, goit); return false;
case EOpComma:
{
TIntermSequence::iterator sit;
TIntermSequence &sequence = node->getSequence();
for (sit = sequence.begin(); sit != sequence.end(); ++sit)
{
(*sit)->traverse(it);
if ( sit+1 != sequence.end())
out << ", ";
}
}
return false;
case EOpFunctionCall:
current->addCalledFunction(node->getName().c_str());
writeFuncCall( node->getPlainName(), node, goit);
return false;
case EOpLessThan: writeFuncCall( "lessThan", node, goit); return false;
case EOpGreaterThan: writeFuncCall( "greaterThan", node, goit); return false;
case EOpLessThanEqual: writeFuncCall( "lessThanEqual", node, goit); return false;
case EOpGreaterThanEqual: writeFuncCall( "greaterThanEqual", node, goit); return false;
case EOpVectorEqual: writeFuncCall( "equal", node, goit); return false;
case EOpVectorNotEqual: writeFuncCall( "notEqual", node, goit); return false;
case EOpMod: writeFuncCall( "mod", node, goit, true); return false;
case EOpPow: writeFuncCall( "pow", node, goit, true); return false;
case EOpAtan2: writeFuncCall( "atan", node, goit, true); return false;
case EOpMin: writeFuncCall( "min", node, goit, true); return false;
case EOpMax: writeFuncCall( "max", node, goit, true); return false;
case EOpClamp: writeFuncCall( "clamp", node, goit, true); return false;
case EOpMix: writeFuncCall( "mix", node, goit, true); return false;
case EOpStep: writeFuncCall( "step", node, goit, true); return false;
case EOpSmoothStep: writeFuncCall( "smoothstep", node, goit, true); return false;
case EOpDistance: writeFuncCall( "distance", node, goit); return false;
case EOpDot: writeFuncCall( "dot", node, goit); return false;
case EOpCross: writeFuncCall( "cross", node, goit); return false;
case EOpFaceForward: writeFuncCall( "faceforward", node, goit); return false;
case EOpReflect: writeFuncCall( "reflect", node, goit); return false;
case EOpRefract: writeFuncCall( "refract", node, goit); return false;
case EOpMul:
{
//This should always have two arguments
assert(node->getSequence().size() == 2);
current->beginStatement();
out << '(';
node->getSequence()[0]->traverse(goit);
out << " * ";
node->getSequence()[1]->traverse(goit);
out << ')';
return false;
}
//HLSL texture functions
case EOpTex1D:
if (argCount == 2)
writeTex( "texture1D", node, goit);
else
{
current->addLibFunction(EOpTex1DGrad);
writeTex( "xll_tex1Dgrad", node, goit);
}
return false;
case EOpTex1DProj:
writeTex( "texture1DProj", node, goit);
return false;
case EOpTex1DLod:
current->addLibFunction(EOpTex1DLod);
writeTex( "xll_tex1Dlod", node, goit);
return false;
case EOpTex1DBias:
current->addLibFunction(EOpTex1DBias);
writeTex( "xll_tex1Dbias", node, goit);
return false;
case EOpTex1DGrad:
current->addLibFunction(EOpTex1DGrad);
writeTex( "xll_tex1Dgrad", node, goit);
return false;
case EOpTex2D:
if (argCount == 2)
writeTex( "texture2D", node, goit);
else
{
current->addLibFunction(EOpTex2DGrad);
writeTex( "xll_tex2Dgrad", node, goit);
}
return false;
case EOpTex2DProj:
writeTex( "texture2DProj", node, goit);
return false;
case EOpTex2DLod:
current->addLibFunction(EOpTex2DLod);
writeTex( "xll_tex2Dlod", node, goit);
return false;
case EOpTex2DBias:
current->addLibFunction(EOpTex2DBias);
writeTex( "xll_tex2Dbias", node, goit);
return false;
case EOpTex2DGrad:
current->addLibFunction(EOpTex2DGrad);
writeTex( "xll_tex2Dgrad", node, goit);
return false;
case EOpTex3D:
if (argCount == 2)
writeTex( "texture3D", node, goit);
else
{
current->addLibFunction(EOpTex3DGrad);
writeTex( "xll_tex3Dgrad", node, goit);
}
return false;
case EOpTex3DProj:
writeTex( "texture3DProj", node, goit);
return false;
case EOpTex3DLod:
current->addLibFunction(EOpTex3DLod);
writeTex( "xll_tex3Dlod", node, goit);
return false;
case EOpTex3DBias:
current->addLibFunction(EOpTex3DBias);
writeTex( "xll_tex3Dbias", node, goit);
return false;
case EOpTex3DGrad:
current->addLibFunction(EOpTex3DGrad);
writeTex( "xll_tex3Dgrad", node, goit);
return false;
case EOpTexCube:
if (argCount == 2)
writeTex( "textureCube", node, goit);
else
{
current->addLibFunction(EOpTexCubeGrad);
writeTex( "xll_texCUBEgrad", node, goit);
}
return false;
case EOpTexCubeProj:
writeTex( "textureCubeProj", node, goit);
return false;
case EOpTexCubeLod:
current->addLibFunction(EOpTexCubeLod);
writeTex( "xll_texCUBElod", node, goit);
return false;
case EOpTexCubeBias:
current->addLibFunction(EOpTexCubeBias);
writeTex( "xll_texCUBEbias", node, goit);
return false;
case EOpTexCubeGrad:
current->addLibFunction(EOpTexCubeGrad);
writeTex( "xll_texCUBEgrad", node, goit);
return false;
case EOpTexRect:
writeTex( "texture2DRect", node, goit);
return false;
case EOpTexRectProj:
writeTex( "texture2DRectProj", node, goit);
return false;
case EOpModf:
current->addLibFunction(EOpModf);
writeFuncCall( "xll_modf", node, goit);
break;
case EOpLdexp:
current->addLibFunction(EOpLdexp);
writeFuncCall( "xll_ldexp", node, goit);
break;
case EOpSinCos:
current->addLibFunction(EOpSinCos);
writeFuncCall ( "xll_sincos", node, goit);
break;
case EOpLit:
current->addLibFunction(EOpLit);
writeFuncCall( "xll_lit", node, goit);
break;
default: goit->infoSink.info << "Bad aggregation op\n";
}
return false;
}
void writeComparison( const TString &compareOp, const TString &compareCall, TIntermBinary *node, TGlslOutputTraverser* goit )
{
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
bool bUseCompareCall = false;
// Determine whether we need the vector or scalar comparison function
if ( ( node->getLeft() && node->getLeft()->getNominalSize() > 1 ) ||
( node->getRight() && node->getRight()->getNominalSize() > 1 ) )
{
bUseCompareCall = true;
}
current->beginStatement ();
// Output vector comparison
if ( bUseCompareCall )
{
out << compareCall << "( ";
if (node->getLeft())
{
// If it is a float, need to smear to the size of the right hand side
if ( node->getLeft()->getNominalSize() == 1 )
{
out << "vec" << node->getRight()->getNominalSize() << "( ";
node->getLeft()->traverse(goit);
out << " )";
}
else
{
node->getLeft()->traverse(goit);
}
}
out << ", ";
if (node->getRight())
{
// If it is a float, need to smear to the size of the left hand side
if ( node->getRight()->getNominalSize() == 1 )
{
out << "vec" << node->getLeft()->getNominalSize() << "( ";
node->getRight()->traverse(goit);
out << " )";
}
else
{
node->getRight()->traverse(goit);
}
}
out << ")";
}
// Output scalar comparison
else
{
out << "(";
if (node->getLeft())
node->getLeft()->traverse(goit);
out << " " << compareOp << " ";
if (node->getRight())
node->getRight()->traverse(goit);
out << ")";
}
}
bool TGlslOutputTraverser::traverseSelection( bool preVisit, TIntermSelection *node, TIntermTraverser *it )
{
TGlslOutputTraverser* goit = static_cast<TGlslOutputTraverser*>(it);
GlslFunction *current = goit->current;
std::stringstream& out = current->getActiveOutput();
current->beginStatement();
if (node->getBasicType() == EbtVoid)
{
// if/else selection
out << "if (";
node->getCondition()->traverse(goit);
out << ')';
current->beginBlock();
node->getTrueBlock()->traverse(goit);
current->endBlock();
if (node->getFalseBlock())
{
current->indent();
out << "else";
current->beginBlock();
node->getFalseBlock()->traverse(goit);
current->endBlock();
}
}
else if (node->isVector() && node->getCondition()->getAsTyped()->isVector())
{
// ?: selection on vectors, e.g. bvec4 ? vec4 : vec4
// emulate HLSL's component-wise selection here
current->addLibFunction(EOpVecTernarySel);
out << "xll_vecTSel (";
node->getCondition()->traverse(goit);
out << ", ";
node->getTrueBlock()->traverse(goit);
out << ", ";
if (node->getFalseBlock())
{
node->getFalseBlock()->traverse(goit);
}
else
assert(0);
out << ")";
}
else
{
// simple ?: selection
out << "(( ";
node->getCondition()->traverse(goit);
out << " ) ? ( ";
node->getTrueBlock()->traverse(goit);
out << " ) : ( ";
if (node->getFalseBlock())
{
node->getFalseBlock()->traverse(goit);
}
else
assert(0);
out << " ))";
}
return false;
}
bool HlslLinker::link(HlslCrossCompiler* compiler, const char* entryFunc, bool usePrecision)
{
std::vector<GlslFunction*> globalList;
std::vector<GlslFunction*> functionList;
std::string entryPoint;
GlslFunction* funcMain = NULL;
FunctionSet calledFunctions;
std::set<TOperator> libFunctions;
std::map<std::string,GlslSymbol*> globalSymMap;
std::map<std::string,GlslStruct*> structMap;
if (!compiler)
{
infoSink.info << "No shader compiler provided\n";
return false;
}
EShLanguage lang = compiler->getLanguage();
if (!entryFunc)
{
infoSink.info << "No shader entry function provided\n";
return false;
}
entryPoint = GetEntryName (entryFunc);
//build the list of functions
HlslCrossCompiler *comp = static_cast<HlslCrossCompiler*>(compiler);
std::vector<GlslFunction*> &fl = comp->functionList;
for ( std::vector<GlslFunction*>::iterator fit = fl.begin(); fit < fl.end(); fit++)
{
if ( (*fit)->getName() == "__global__")
globalList.push_back( *fit);
else
functionList.push_back( *fit);
if ((*fit)->getName() == entryPoint)
{
if (funcMain)
{
infoSink.info << kShaderTypeNames[lang] << " entry function cannot be overloaded\n";
return false;
}
funcMain = *fit;
}
}
// check to ensure that we found the entry function
if (!funcMain)
{
infoSink.info << "Failed to find entry function: '" << entryPoint <<"'\n";
return false;
}
//add all the called functions to the list
calledFunctions.push_back (funcMain);
if (!addCalledFunctions (funcMain, calledFunctions, functionList))
{
infoSink.info << "Failed to resolve all called functions in the " << kShaderTypeNames[lang] << " shader\n";
}
//iterate over the functions, building a global list of structure declaractions and symbols
// assume a single compilation unit for expediency (eliminates name clashes, as type checking
// withing a single compilation unit has been performed)
for (FunctionSet::iterator it=calledFunctions.begin(); it != calledFunctions.end(); it++)
{
//get each symbol and each structure, and add them to the map
// checking that any previous entries are equivalent
const std::vector<GlslSymbol*> &symList = (*it)->getSymbols();
for (std::vector<GlslSymbol*>::const_iterator cit = symList.begin(); cit < symList.end(); cit++)
{
if ( (*cit)->getIsGlobal())
{
//should check for already added ones here
globalSymMap[(*cit)->getName()] = *cit;
}
}
//take each referenced library function, and add it to the set
const std::set<TOperator> &libSet = (*it)->getLibFunctions();
libFunctions.insert( libSet.begin(), libSet.end());
}
// The following code is what is used to generate the actual shader and "main"
// function. The process is to take all the components collected above, and
// write them to the appropriate code stream. Finally, a main function is
// generated that calls the specified entrypoint. That main function uses
// semantics on the arguments and return values to connect items appropriately.
//
// Write Library Functions & required extensions
std::string shaderExtensions, shaderLibFunctions;
if (!libFunctions.empty())
{
for (std::set<TOperator>::iterator it = libFunctions.begin(); it != libFunctions.end(); it++)
{
const std::string &func = getHLSLSupportCode(*it, shaderExtensions, lang==EShLangVertex);
if (!func.empty())
{
shaderLibFunctions += func;
shaderLibFunctions += '\n';
}
}
}
shader << shaderExtensions;
shader << shaderLibFunctions;
//
//Structure addition hack
// Presently, structures are not tracked per function, just dump them all
// This could be improved by building a complete list of structures for the
// shaders based on the variables in each function
//
{
HlslCrossCompiler *comp = static_cast<HlslCrossCompiler*>(compiler);
std::vector<GlslStruct*> &sList = comp->structList;
if (!sList.empty())
{
for (std::vector<GlslStruct*>::iterator it = sList.begin(); it < sList.end(); it++)
{
shader << (*it)->getDecl() << "\n";
}
}
}
//
// Write global variables
//
if (!globalSymMap.empty())
{
for (std::map<std::string,GlslSymbol*>::iterator sit = globalSymMap.begin(); sit != globalSymMap.end(); sit++)
{
sit->second->writeDecl(shader,false,false);
shader << ";\n";
if ( sit->second->getIsMutable() )
{
sit->second->writeDecl(shader, true, false);
shader << ";\n";
}
}
}
//
// Write function declarations and definitions
//
EmitCalledFunctions (shader, calledFunctions);
//
// Gather the uniforms into the uniform list
//
for (std::map<std::string, GlslSymbol*>::iterator it = globalSymMap.begin(); it != globalSymMap.end(); it++)
{
if (it->second->getQualifier() != EqtUniform)
continue;
ShUniformInfo infoStruct;
infoStruct.name = new char[it->first.size()+1];
strcpy( infoStruct.name, it->first.c_str());
if (it->second->getSemantic() != "")
{
infoStruct.semantic = new char[it->second->getSemantic().size()+1];
strcpy( infoStruct.semantic, it->second->getSemantic().c_str());
}
else
infoStruct.semantic = 0;
//gigantic hack, the enumerations are kept in alignment
infoStruct.type = (EShType)it->second->getType();
infoStruct.arraySize = it->second->getArraySize();
if ( it->second->hasInitializer() )
{
int initSize = it->second->initializerSize();
infoStruct.init = new float[initSize];
memcpy( infoStruct.init, it->second->getInitializer(), sizeof(float) * initSize);
}
else
infoStruct.init = 0;
//TODO: need to add annotation
uniforms.push_back( infoStruct);
}
//
// Generate the main function
//
std::stringstream attrib;
std::stringstream uniform;
std::stringstream preamble;
std::stringstream postamble;
std::stringstream varying;
std::stringstream call;
const int pCount = funcMain->getParameterCount();
preamble << "void main() {\n";
const EGlslSymbolType retType = funcMain->getReturnType();
GlslStruct *retStruct = funcMain->getStruct();
if ( retType == EgstStruct)
{
assert(retStruct);
preamble << " " << retStruct->getName() << " xl_retval;\n";
}
else
{
if ( retType != EgstVoid)
{
preamble << " ";
writeType (preamble, retType, NULL, usePrecision?funcMain->getPrecision():EbpUndefined);
preamble << " xl_retval;\n";
}
}
// Write all mutable initializations
if ( calledFunctions.size() > 0 )
{
for (FunctionSet::iterator fit = calledFunctions.begin(); fit != calledFunctions.end(); fit++)
{
std::string mutableDecls = (*fit)->getMutableDecls(1, calledFunctions.begin(), fit);
if ( mutableDecls.size() > 0 )
{
preamble << mutableDecls;
}
}
}
call << " ";
if (retType != EgstVoid)
call << "xl_retval = " << funcMain->getName() << "( ";
else
call << funcMain->getName() << "( ";
// pass main function parameters
for (int ii=0; ii<pCount; ii++)
{
GlslSymbol *sym = funcMain->getParameter(ii);
EAttribSemantic attrSem = parseAttributeSemantic( sym->getSemantic());
switch (sym->getQualifier())
{
// -------- IN & OUT parameters
case EqtIn:
case EqtInOut:
if ( sym->getType() != EgstStruct)
{
std::string name, ctor;
int pad;
if ( getArgumentData( sym, lang==EShLangVertex ? EClassAttrib : EClassVarIn, name, ctor, pad) )
{
// In fragment shader, pass zero for POSITION inputs
bool ignoredPositionInFragment = false;
if (lang == EShLangFragment && attrSem == EAttrSemPosition)
{
call << ctor << "(0.0)";
ignoredPositionInFragment = true;
}
// For "in" parameters, just call directly to the main
else if ( sym->getQualifier() != EqtInOut )
{
call << ctor << "(" << name;
for (int ii = 0; ii<pad; ii++)
call << ", 0.0";
call << ")";
}
// For "inout" parameters, declare a temp and initialize the temp
else
{
preamble << " ";
writeType (preamble, sym->getType(), NULL, usePrecision?sym->getPrecision():EbpUndefined);
preamble << " xlt_" << sym->getName() << " = ";
preamble << ctor << "(" << name;
for (int ii = 0; ii<pad; ii++)
preamble << ", 0.0";
preamble << ");\n";
}
if (lang == EShLangVertex) // vertex shader: deal with gl_ attributes
{
if ( strncmp( name.c_str(), "gl_", 3))
{
int typeOffset = 0;
// If the type is integer or bool based, we must convert to a float based
// type. This is because GLSL does not allow int or bool based vertex attributes.
if ( sym->getType() >= EgstInt && sym->getType() <= EgstInt4)
{
typeOffset += 4;
}
if ( sym->getType() >= EgstBool && sym->getType() <= EgstBool4)
{
typeOffset += 8;
}
// This is an undefined attribute
attrib << "attribute " << getTypeString((EGlslSymbolType)(sym->getType() + typeOffset)) << " " << name << ";\n";
}
}
if (lang == EShLangFragment) // deal with varyings
{
if (!ignoredPositionInFragment)
AddToVaryings (varying, sym->getPrecision(), ctor, name);
}
}
else
{
//should deal with fall through cases here
assert(0);
infoSink.info << "Unsupported type for shader entry parameter (";
infoSink.info << getTypeString(sym->getType()) << ")\n";
}
}
else
{
//structs must pass the struct, then process per element
GlslStruct *Struct = sym->getStruct();
assert(Struct);
//first create the temp
std::string tempVar = "xlt_" + sym->getName();
preamble << " " << Struct->getName() << " ";
preamble << tempVar <<";\n";
call << tempVar;
const int elem = Struct->memberCount();
for (int jj=0; jj<elem; jj++)
{
const GlslStruct::member ¤t = Struct->getMember(jj);
EAttribSemantic memberSem = parseAttributeSemantic (current.semantic);
std::string name, ctor;
int pad;
int numArrayElements = 1;
bool bIsArray = false;
// If it is an array, loop over each member
if ( current.arraySize > 0 )
{
numArrayElements = current.arraySize;
bIsArray = true;
}
for ( int arrayIndex = 0; arrayIndex < numArrayElements; arrayIndex++ )
{
if ( getArgumentData2( current.name, current.semantic, current.type,
lang==EShLangVertex ? EClassAttrib : EClassVarIn, name, ctor, pad, arrayIndex ) )
{
preamble << " ";
preamble << tempVar << "." << current.name;
if ( bIsArray )
preamble << "[" << arrayIndex << "]";
// In fragment shader, pass zero for POSITION inputs
bool ignoredPositionInFragment = false;
if (lang == EShLangFragment && memberSem == EAttrSemPosition)
{
preamble << " = " << ctor << "(0.0);\n";
ignoredPositionInFragment = true;
}
else
{
preamble << " = " << ctor << "( " << name;
for (int ii = 0; ii<pad; ii++)
preamble << ", 0.0";
preamble << ");\n";
}
if (lang == EShLangVertex) // vertex shader: gl_ attributes
{
if ( strncmp( name.c_str(), "gl_", 3))
{
int typeOffset = 0;
// If the type is integer or bool based, we must convert to a float based
// type. This is because GLSL does not allow int or bool based vertex attributes.
if ( current.type >= EgstInt && current.type <= EgstInt4)
{
typeOffset += 4;
}
if ( current.type >= EgstBool && current.type <= EgstBool4)
{
typeOffset += 8;
}
// This is an undefined attribute
attrib << "attribute " << getTypeString((EGlslSymbolType)(current.type + typeOffset)) << " " << name << ";\n";
}
}
if (lang == EShLangFragment) // deal with varyings
{
if (!ignoredPositionInFragment)
AddToVaryings (varying, current.precision, ctor, name);
}
}
else
{
//should deal with fall through cases here
assert(0);
infoSink.info << "Unsupported type for struct element in shader entry parameter (";
infoSink.info << getTypeString(current.type) << ")\n";
}
}
}
}
//
// NOTE: This check only breaks out of the case if we have an "in" parameter, for
// "inout" it will fallthrough to the next case
//
if ( sym->getQualifier() != EqtInOut )
{
break;
}
// -------- OUT parameters; also fall-through for INOUT (see the check above)
case EqtOut:
if ( sym->getType() != EgstStruct)
{
std::string name, ctor;
int pad;
if ( getArgumentData( sym, lang==EShLangVertex ? EClassVarOut : EClassRes, name, ctor, pad) )
{
// For "inout" parameters, the preamble was already written so no need to do it here.
if ( sym->getQualifier() != EqtInOut )
{
preamble << " ";
writeType (preamble, sym->getType(), NULL, usePrecision?sym->getPrecision():EbpUndefined);
preamble << " xlt_" << sym->getName() << ";\n";
}
if (lang == EShLangVertex) // deal with varyings
{
AddToVaryings (varying, sym->getPrecision(), ctor, name);
}
call << "xlt_" << sym->getName();
postamble << " ";
postamble << name << " = " << ctor << "( xlt_" <<sym->getName();
for (int ii = 0; ii<pad; ii++)
postamble << ", 0.0";
postamble << ");\n";
}
else
{
//should deal with fall through cases here
assert(0);
infoSink.info << "Unsupported type for shader entry parameter (";
infoSink.info << getTypeString(sym->getType()) << ")\n";
}
}
else
{
//structs must pass the struct, then process per element
GlslStruct *Struct = sym->getStruct();
assert(Struct);
//first create the temp
std::string tempVar = "xlt_" + sym->getName();
// For "inout" parmaeters the preamble and call were already written, no need to do it here
if ( sym->getQualifier() != EqtInOut )
{
preamble << " " << Struct->getName() << " ";
preamble << tempVar <<";\n";
call << tempVar;
}
const int elem = Struct->memberCount();
for (int ii=0; ii<elem; ii++)
{
const GlslStruct::member ¤t = Struct->getMember(ii);
std::string name, ctor;
int pad;
if ( getArgumentData2( current.name, current.semantic, current.type, lang==EShLangVertex ? EClassVarOut : EClassRes, name, ctor, pad, 0) )
{
postamble << " ";
postamble << name << " = " << ctor;
postamble << "( " << tempVar << "." << current.name;
for (int ii = 0; ii<pad; ii++)
postamble << ", 0.0";
postamble << ");\n";
if (lang == EShLangVertex) // deal with varyings
{
AddToVaryings (varying, current.precision, ctor, name);
}
}
else
{
//should deal with fall through cases here
assert(0);
infoSink.info << "Unsupported type in struct element for shader entry parameter (";
infoSink.info << getTypeString(current.type) << ")\n";
}
}
}
break;
case EqtUniform:
uniform << "uniform ";
writeType (uniform, sym->getType(), NULL, usePrecision?sym->getPrecision():EbpUndefined);
uniform << " xlu_" << sym->getName() << ";\n";
call << "xlu_" << sym->getName();
break;
default:
assert(0);
};
if (ii != pCount -1)
call << ", ";
}
call << ");\n";
// -------- return value of main entry point
if (retType != EgstVoid)
{
if (retType != EgstStruct)
{
std::string name, ctor;
int pad;
if ( getArgumentData2( "", funcMain->getSemantic(), retType, lang==EShLangVertex ? EClassVarOut : EClassRes,
name, ctor, pad, 0) )
{
postamble << " ";
postamble << name << " = " << ctor << "( xl_retval";
for (int ii = 0; ii<pad; ii++)
postamble << ", 0.0";
postamble << ");\n";
if (lang == EShLangVertex) // deal with varyings
{
AddToVaryings (varying, funcMain->getPrecision(), ctor, name);
}
}
else
{
//should deal with fall through cases here
assert(0);
infoSink.info << (lang==EShLangVertex ? "Unsupported type for shader return value (" : "Unsupported return type for shader entry function (");
infoSink.info << getTypeString(retType) << ")\n";
}
}
else
{
const int elem = retStruct->memberCount();
for (int ii=0; ii<elem; ii++)
{
const GlslStruct::member ¤t = retStruct->getMember(ii);
std::string name, ctor;
int pad;
int numArrayElements = 1;
bool bIsArray = false;
if (lang == EShLangVertex) // vertex shader
{
// If it is an array, loop over each member
if ( current.arraySize > 0 )
{
numArrayElements = current.arraySize;
bIsArray = true;
}
}
for ( int arrayIndex = 0; arrayIndex < numArrayElements; arrayIndex++ )
{
if ( getArgumentData2( current.name, current.semantic, current.type, lang==EShLangVertex ? EClassVarOut : EClassRes, name, ctor, pad, arrayIndex) )
{
postamble << " ";
postamble << name;
postamble << " = " << ctor;
postamble << "( xl_retval." << current.name;
if ( bIsArray )
{
postamble << "[" << arrayIndex << "]";
}
for (int ii = 0; ii<pad; ii++)
postamble << ", 0.0";
postamble << ");\n";
if (lang == EShLangVertex) // deal with varyings
{
AddToVaryings (varying, current.precision, ctor, name);
}
}
else
{
//should deal with fall through cases here
//assert(0);
infoSink.info << (lang==EShLangVertex ? "Unsupported element type in struct for shader return value (" : "Unsupported struct element type in return type for shader entry function (");
infoSink.info << getTypeString(current.type) << ")\n";
return false;
}
}
}
}
}
else
{
if (lang == EShLangFragment) // fragment shader
{
// If no return type, close off the output
postamble << ";\n";
}
}
postamble << "}\n\n";
EmitIfNotEmpty (shader, uniform);
EmitIfNotEmpty (shader, attrib);
EmitIfNotEmpty (shader, varying);
shader << preamble.str() << "\n";
shader << call.str() << "\n";
shader << postamble.str() << "\n";
return true;
}
bool HlslLinker::link(HlslCrossCompiler* compiler, const char* entryFunc, ETargetVersion targetVersion, unsigned options)
{
m_Target = targetVersion;
m_Options = options;
m_Extensions.clear();
if (!linkerSanityCheck(compiler, entryFunc))
return false;
const bool usePrecision = Hlsl2Glsl_VersionUsesPrecision(targetVersion);
EShLanguage lang = compiler->getLanguage();
std::string entryPoint = GetEntryName (entryFunc);
// figure out all relevant functions
GlslFunction* globalFunction = NULL;
std::vector<GlslFunction*> functionList;
FunctionSet calledFunctions;
GlslFunction* funcMain = NULL;
if (!buildFunctionLists(compiler, lang, entryPoint, globalFunction, functionList, calledFunctions, funcMain))
return false;
assert(globalFunction);
assert(funcMain);
// uniforms and used built-in functions
std::vector<GlslSymbol*> constants;
std::set<TOperator> libFunctions;
buildUniformsAndLibFunctions(calledFunctions, constants, libFunctions);
// add built-in functions possibly used by uniform initializers
const std::set<TOperator>& referencedGlobalFunctions = globalFunction->getLibFunctions();
libFunctions.insert (referencedGlobalFunctions.begin(), referencedGlobalFunctions.end());
buildUniformReflection (constants);
// print all the components collected above.
emitLibraryFunctions (libFunctions, lang, usePrecision);
emitStructs(compiler);
emitGlobals (globalFunction, constants);
EmitCalledFunctions (shader, calledFunctions);
// Generate a main function that calls the specified entrypoint.
// That main function uses semantics on the arguments and return values to
// connect items appropriately.
std::stringstream attrib;
std::stringstream uniform;
std::stringstream preamble;
std::stringstream postamble;
std::stringstream varying;
std::stringstream call;
markDuplicatedInSemantics(funcMain);
// Declare return value
const EGlslSymbolType retType = funcMain->getReturnType();
emitMainStart(compiler, retType, funcMain, m_Options, usePrecision, preamble, constants);
// Call the entry point
call << " ";
if (retType != EgstVoid)
call << "xl_retval = ";
call << funcMain->getName() << "( ";
// Entry point parameters
const int pCount = funcMain->getParameterCount();
for (int ii=0; ii<pCount; ii++)
{
GlslSymbol *sym = funcMain->getParameter(ii);
EAttribSemantic attrSem = parseAttributeSemantic( sym->getSemantic());
add_extension_from_semantic(attrSem, m_Target, m_Extensions);
switch (sym->getQualifier())
{
// -------- IN & OUT parameters
case EqtIn:
case EqtInOut:
case EqtConst:
if (sym->getType() != EgstStruct)
{
emitInputNonStructParam(sym, lang, usePrecision, attrSem, attrib, varying, preamble, call);
}
else
{
emitInputStructParam(sym, lang, attrib, varying, preamble, call);
}
// NOTE: for "inout" parameters need to fallthrough to the next case
if (sym->getQualifier() != EqtInOut)
{
break;
}
// -------- OUT parameters; also fall-through for INOUT (see the check above)
case EqtOut:
if ( sym->getType() != EgstStruct)
{
emitOutputNonStructParam(sym, lang, usePrecision, attrSem, varying, preamble, postamble, call);
}
else
{
emitOutputStructParam(sym, lang, usePrecision, attrSem, varying, preamble, postamble, call);
}
break;
case EqtUniform:
uniform << "uniform ";
writeType (uniform, sym->getType(), NULL, usePrecision?sym->getPrecision():EbpUndefined);
uniform << " xlu_" << sym->getName();
if(sym->getArraySize())
uniform << "[" << sym->getArraySize() << "]";
uniform << ";\n";
call << "xlu_" << sym->getName();
break;
default:
assert(0);
};
if (ii != pCount -1)
call << ", ";
}
call << ");\n";
// Entry point return value
if (!emitReturnValue(retType, funcMain, lang, varying, postamble))
return false;
postamble << "}\n\n";
// Generate final code of the pieces above.
{
shaderPrefix << kTargetVersionStrings[targetVersion];
ExtensionSet::const_iterator it = m_Extensions.begin(), end = m_Extensions.end();
for (; it != end; ++it)
shaderPrefix << "#extension " << *it << " : require" << std::endl;
}
EmitIfNotEmpty (shader, uniform);
EmitIfNotEmpty (shader, attrib);
EmitIfNotEmpty (shader, varying);
shader << preamble.str() << "\n";
shader << call.str() << "\n";
shader << postamble.str() << "\n";
return true;
}