BeeEngine/glslang-zig
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

HLSL: Add EOpMatrixSwizzle, selectively decomposed to other ops, for issue #670.

Browse source 
Since EOpMatrixSwizzle is a new op, existing back-ends only work when the
front end first decomposes it to other operations. So far, this is only
being done for simple assignment into matrix swizzles.
This commit is contained in:
John Kessenich 2017-01-13 12:27:52 -07:00
parent 001dfa1c5c
commit fdf6347f0a
12 changed files with 907 additions and 116 deletions
Download patch file Download diff file Expand all files Collapse all files

24
glslang/MachineIndependent/Intermediate.cpp
View file

@ -1408,6 +1408,26 @@ TIntermTyped* TIntermediate::addSwizzle(TVectorFields& fields, const TSourceLoc&
return node;
}
// A matrix swizzle is a sequence of nodes, 2N long, where N is the
// number of components in the swizzle, alternating col,row, col,row, ...
TIntermTyped* TIntermediate::addSwizzle(TMatrixComponents& comps, const TSourceLoc& loc)
{
TIntermAggregate* node = new TIntermAggregate(EOpSequence);
node->setLoc(loc);
TIntermConstantUnion* constIntNode;
TIntermSequence &sequenceVector = node->getSequence();
for (int i = 0; i < comps.size(); i++) {
constIntNode = addConstantUnion(comps.get(i).coord1, loc);
sequenceVector.push_back(constIntNode);
constIntNode = addConstantUnion(comps.get(i).coord2, loc);
sequenceVector.push_back(constIntNode);
}
return node;
}
//
// Follow the left branches down to the root of an l-value
// expression (just "." and []).
@ -1425,10 +1445,10 @@ const TIntermTyped* TIntermediate::findLValueBase(const TIntermTyped* node, bool
if (binary == nullptr)
return node;
TOperator op = binary->getOp();
if (op != EOpIndexDirect && op != EOpIndexIndirect && op != EOpIndexDirectStruct && op != EOpVectorSwizzle)
if (op != EOpIndexDirect && op != EOpIndexIndirect && op != EOpIndexDirectStruct && op != EOpVectorSwizzle && op != EOpMatrixSwizzle)
return nullptr;
if (! swizzleOkay) {
if (op == EOpVectorSwizzle)
if (op == EOpVectorSwizzle || op == EOpMatrixSwizzle)
return nullptr;
if ((op == EOpIndexDirect || op == EOpIndexIndirect) &&
(binary->getLeft()->getType().isVector() || binary->getLeft()->getType().isScalar()) &&