yum-mirror/slang

Making it easier to work with shaders

git clone https://git.yummers.dev/yum-mirror/slang

Jay KwakUpdate spirv-header and spirv-tools to Jun/2024 (#4679)ad379b7c5

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1// hello.slang
2
3// Test that a simple mesh shader compiles
4
5//TEST:SIMPLE(filecheck=SPIRV):-target spirv-assembly -entry main -stage mesh -profile glsl_450+spirv_1_4
6//TEST:SIMPLE(filecheck=DXIL):-target dxil-assembly  -entry main -stage mesh -profile sm_6_6
7
8// DXIL: call void @dx.op.setMeshOutputCounts
9// DXIL: call void @dx.op.storeVertexOutput.f32
10// DXIL: call void @dx.op.emitIndices
11// SPIRV: OpEntryPoint MeshEXT %main
12
13// SPIRV-DAG: OpExecutionMode %main OutputVertices 3
14// SPIRV-DAG: OpExecutionMode %main OutputPrimitives{{NV|EXT}} 1
15// SPIRV-DAG: OpExecutionMode %main OutputTriangles{{NV|EXT}}
16
17// SPIRV: OpSetMeshOutputsEXT
18
19const static float2 positions[3] = {
20  float2(0.0, -0.5),
21  float2(0.5, 0.5),
22  float2(-0.5, 0.5)
23};
24
25const static float3 colors[3] = {
26  float3(1.0, 1.0, 0.0),
27  float3(0.0, 1.0, 1.0),
28  float3(1.0, 0.0, 1.0)
29};
30
31struct Vertex
32{
33  float4 pos : SV_Position;
34  float3 color : Color;
35};
36
37const static uint MAX_VERTS = 3;
38const static uint MAX_PRIMS = 1;
39
40[outputtopology("triangle")]
41[numthreads(3, 1, 1)]
42void main(
43    in uint tig : SV_GroupIndex,
44    OutputVertices<Vertex, MAX_VERTS> verts,
45    OutputIndices<uint3, MAX_PRIMS> triangles
46    )
47{
48    const uint numVertices = 3;
49    const uint numPrimitives = 1;
50    SetMeshOutputCounts(numVertices, numPrimitives);
51
52    if(tig < numVertices) {
53        verts[tig] = {float4(positions[tig], 0, 1), colors[tig]};
54    }
55
56    if(tig < numPrimitives) {
57        triangles[tig] = uint3(0,1,2);
58    }
59}
60