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Put in basic propagation algorithm for precision qualifiers. Some corner cases are document as TODO.

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git-svn-id: https://cvs.khronos.org/svn/repos/ogl/trunk/ecosystem/public/sdk/tools/glslang@20360 e7fa87d3-cd2b-0410-9028-fcbf551c1848
This commit is contained in:
John Kessenich 2013-01-28 23:52:49 +00:00
parent cc2f8022d4
commit e406f1c71c
5 changed files with 61 additions and 11 deletions
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50
glslang/MachineIndependent/Intermediate.cpp
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@ -836,6 +836,8 @@ bool TIntermBinary::promote(TInfoSink& infoSink)
// Fix precision qualifiers
if (right->getQualifier().precision > getQualifier().precision)
getQualifier().precision = right->getQualifier().precision;
left->propagatePrecision(getQualifier().precision);
right->propagatePrecision(getQualifier().precision);
//
// Array operations.
@ -1078,7 +1080,53 @@ bool CompareStruct(const TType& leftNodeType, constUnion* rightUnionArray, const
}
}
return true;
}
}
void TIntermTyped::propagatePrecision(TPrecisionQualifier newPrecision)
{
if (getQualifier().precision != EpqNone || (getBasicType() != EbtInt && getBasicType() != EbtFloat))
return;
getQualifier().precision = newPrecision;
TIntermBinary* binaryNode = getAsBinaryNode();
if (binaryNode) {
binaryNode->getLeft()->propagatePrecision(newPrecision);
binaryNode->getRight()->propagatePrecision(newPrecision);
}
TIntermUnary* unaryNode = getAsUnaryNode();
if (unaryNode)
unaryNode->getOperand()->propagatePrecision(newPrecision);
TIntermAggregate* aggregateNode = getAsAggregate();
if (aggregateNode) {
TIntermSequence operands = aggregateNode->getSequence();
for (unsigned int i = 0; i < operands.size(); ++i) {
TIntermTyped* typedNode = operands[i]->getAsTyped();
if (! typedNode)
break;
typedNode->propagatePrecision(newPrecision);
}
}
TIntermSelection* selectionNode = getAsSelectionNode();
if (selectionNode) {
TIntermTyped* typedNode = selectionNode->getTrueBlock()->getAsTyped();
if (typedNode) {
typedNode->propagatePrecision(newPrecision);
typedNode = selectionNode->getFalseBlock()->getAsTyped();
if (typedNode)
typedNode->propagatePrecision(newPrecision);
}
}
// TODO: propagate precision for
// comma operator: just through the last operand
// ":?" and ",": where is this triggered?
// built-in function calls: how much to propagate to arguments?
// performance: don't do this for desktop profiles
}
bool CompareStructure(const TType& leftNodeType, constUnion* rightUnionArray, constUnion* leftUnionArray)
{