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HLSL requires vec2 tessellation coordinate declarations in some cases (e.g, isoline topology), where SPIR-V requires the TessCoord qualified builtin to be a vec3 in all cases. This alters the IO form of the variable to be a vec3, which will be copied to the shader's declared type if needed. This is not a validation; the shader type must be correct.
32 lines
652 B
GLSL
32 lines
652 B
GLSL
// Test vec2 tessellation coordinate: the IO form should be a vec3, copied to a vec2
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// at the entry point boundary.
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struct ds_in_t
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{
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float4 pos : POSITION;
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float3 norm : TEXCOORD0;
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};
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struct pcf_in_t
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{
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float flTessFactor [3] : SV_TessFactor;
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float flInsideTessFactor : SV_InsideTessFactor;
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};
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struct gs_in_t
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{
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float4 pos : POSITION;
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float3 norm : TEXCOORD0;
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};
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[domain ( "isoline" )]
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gs_in_t main (const OutputPatch <ds_in_t, 2> i, float2 tesscoord : SV_DomainLocation, pcf_in_t pcf_data )
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{
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gs_in_t o;
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o.pos = i[0].pos + tesscoord.x;
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o.norm = i[0].norm + tesscoord.y;
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return o;
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}
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