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//TEST:SIMPLE(filecheck=CHECK): -target spirv
// CHECK-DAG: OpExecutionMode %main SpacingEqual
// CHECK-DAG: OpExecutionMode %main OutputVertices 4
// CHECK-DAG: OpExecutionMode %main VertexOrderCw
// CHECK-DAG: OpExecutionMode %main Quads
// CHECK: OpDecorate %gl_TessLevelOuter BuiltIn TessLevelOuter
// CHECK: OpDecorate %gl_TessLevelOuter Patch
// CHECK: OpDecorate %gl_TessLevelInner BuiltIn TessLevelInner
// CHECK: OpDecorate %gl_TessLevelInner Patch
// CHECK: OpControlBarrier %uint_2 %uint_4 %uint_0
// CHECK: OpStore %gl_TessLevelOuter
// CHECK: OpStore %gl_TessLevelInner
struct VS_OUT
{
float3 position : POSITION;
};
struct HS_OUT
{
float3 position : POSITION;
};
struct HSC_OUT
{
float EdgeTessFactor[4] : SV_TessFactor;
float InsideTessFactor[2] : SV_InsideTessFactor;
};
// Hull Shader (HS)
[domain("quad")]
[partitioning("integer")]
[outputtopology("triangle_cw")]
[outputcontrolpoints(4)]
[patchconstantfunc("constants")]
HS_OUT main(InputPatch<VS_OUT, 4> patch, uint i : SV_OutputControlPointID)
{
HS_OUT o;
o.position = patch[i].position;
return o;
}
HSC_OUT constants(InputPatch<VS_OUT, 4> patch)
{
float3 p0 = patch[0].position;
float3 p1 = patch[1].position;
float3 p2 = patch[2].position;
float3 p3 = patch[3].position;
HSC_OUT o;
o.EdgeTessFactor[0] = dot(p0, p1);
o.EdgeTessFactor[1] = dot(p0, p3);
o.EdgeTessFactor[2] = dot(p2, p3);
o.EdgeTessFactor[3] = dot(p1, p2);
o.InsideTessFactor[0] = lerp(o.EdgeTessFactor[1], o.EdgeTessFactor[3], 0.5);
o.InsideTessFactor[1] = lerp(o.EdgeTessFactor[0], o.EdgeTessFactor[2], 0.5);
return o;
}
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