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LoopDawg authored
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.e2cda3c2
hlsl.clipdistance-6.frag 330 B
struct VS_OUTPUT {
float4 Position : SV_Position;
float4 clip0 : SV_ClipDistance0; // multiple semantic IDs, two vec4s (no extra packing)
float4 clip1 : SV_ClipDistance1; // ...
};
float4 main(VS_OUTPUT v) : SV_Target0
{
return v.Position + v.clip0 + v.clip1;
}