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HLSL: handle clip and cull distance input builtin type conversion

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HLSL allows a range of types for clip and cull distances.  There are
three dimensions, including arrayness, vectorness, and semantic ID.
SPIR-V requires clip and cull distance be a single array of floats in
all cases.

This code provides input side conversion between the SPIR-V form and
the HLSL form.  (Output conversion was added in PR #947 and #997).

This PR extends HlslParseContext::assignClipCullDistance to cope with
the input side conversion.  Not as much changed as appears: there was
also a lot of renaming to reflect the fact that the code now handles
either direction.

Currently, non-{frag,vert} stages are not handled, and are explicitly
rejected.

Fixes #1026.
This commit is contained in:
LoopDawg 2017-08-23 12:34:42 -06:00
parent 778806a692
commit e2cda3c2d7
27 changed files with 3272 additions and 247 deletions
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4
hlsl/hlslParseHelper.h
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@ -435,8 +435,8 @@ protected:
TVariable* gsStreamOutput; // geometry shader stream outputs, for emit (Append method)
TVariable* clipDistanceOutput; // synthesized clip distance output variable (shader might have >1)
TVariable* cullDistanceOutput; // synthesized cull distance output variable (shader might have >1)
TVariable* clipDistanceVariable; // synthesized clip distance variable (shader might have >1)
TVariable* cullDistanceVariable; // synthesized cull distance variable (shader might have >1)
static const int maxClipCullRegs = 2;
std::array<int, maxClipCullRegs> clipSemanticNSize; // vector, indexed by clip semantic ID