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//TEST:SIMPLE(filecheck=CHECK): -target spirv -emit-spirv-directly
// CHECK: OpDecorate %primitives_color Location 0
// CHECK: OpDecorate %primitives_color PerPrimitive
// CHECK: OpDecorate %prim_color Location 0
// CHECK: OpDecorate %prim_color Flat
const static uint MAX_VERTS = 6;
const static uint MAX_PRIMS = 2;
const static float2 positions[MAX_VERTS] = {
float2(0.0, -0.5),
float2(0.5, 0),
float2(-0.5, 0),
float2(0.0, 0.5),
float2(0.5, 0),
float2(-0.5, 0),
};
struct Vertex
{
float4 pos : SV_Position;
};
struct Primitive
{
[[vk::location(0)]] float3 color;
}
[outputtopology("triangle")]
[numthreads(MAX_VERTS, 1, 1)]
[shader("mesh")]
void entry_mesh(
in uint tig : SV_GroupThreadID,
OutputVertices<Vertex, MAX_VERTS> verts,
OutputIndices<uint3, MAX_PRIMS> triangles,
OutputPrimitives<Primitive, MAX_PRIMS> primitives)
{
const uint numVertices = MAX_VERTS;
const uint numPrimitives = MAX_PRIMS;
SetMeshOutputCounts(numVertices, numPrimitives);
if(tig < numVertices) {
verts[tig] = {float4(positions[tig], 0, 1)};
}
if(tig < numPrimitives) {
triangles[tig] = uint3(0,1,2) + tig * 3;
primitives[tig] = { float3(1,0,0) };
}
}
struct FragmentOut
{
[[vk::location(0)]] float3 color;
};
[shader("fragment")]
FragmentOut entry_fragment(in nointerpolation Primitive prim)
{
FragmentOut frag_out;
frag_out.color = prim.color;
return frag_out;
}
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