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HLSL: require tessellation factors to be fixed size arrays

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SPIR-V requires that tessellation factor arrays be size 4 (outer) or 2 (inner).
HLSL allows other sizes such as 3, or even scalars.  This commit converts
between them by forcing the IO types to be the SPIR-V size, and allowing
copies between the internal and IO types to handle these cases.
This commit is contained in:
steve-lunarg 2017-03-17 18:51:05 -06:00
parent 9cee73e028
commit 194f0f39ec
6 changed files with 216 additions and 162 deletions
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4
Test/hlsl.hull.ctrlpt-1.tesc
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@ -9,8 +9,8 @@ struct hs_in_t
struct hs_pcf_t
{
float tfactor[3] : SV_TessFactor;
float flInFactor : SV_InsideTessFactor;
float tfactor[3] : SV_TessFactor; // must turn into a size 4 array in SPIR-V
float flInFactor : SV_InsideTessFactor; // must turn into a size 2 array in SPIR-V
};
struct hs_out_t