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HLSL: matrix swizzle (_12, _m23) syntax, partial semantics.

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This partially addressess issue #670, for when the matrix swizzle
degenerates to a component or column: m[c], m[c][r] (where HLSL
swaps rows and columns for user's view).

An error message is given for the arbitrary cases not covered.

These cases will work for arbitrary use of l-values.

Future work will handle more arbitrary swizzles, which might
not work as arbitrary l-values.
This commit is contained in:
John Kessenich 2017-01-12 16:51:18 -07:00
parent 913e3b686a
commit 001dfa1c5c
6 changed files with 367 additions and 62 deletions
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2
hlsl/hlslParseHelper.h
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@ -97,6 +97,8 @@ public:
TIntermAggregate* handleSamplerTextureCombine(const TSourceLoc& loc, TIntermTyped* argTex, TIntermTyped* argSampler);
bool parseVectorFields(const TSourceLoc&, const TString&, int vecSize, TVectorFields&);
bool parseMatrixComponents(const TSourceLoc&, const TString&, int cols, int rows, TMatrixComponents&);
int getMatrixComponentsColumn(int rows, const TMatrixComponents&);
void assignError(const TSourceLoc&, const char* op, TString left, TString right);
void unaryOpError(const TSourceLoc&, const char* op, TString operand);
void binaryOpError(const TSourceLoc&, const char* op, TString left, TString right);