Metal Task Shader payload (#4238)

1 files changed, 102 insertions, 0 deletions

diff --git a/tests/metal/simple-task.slang b/tests/metal/simple-task.slang
new file mode 100644
index 000000000..fa38f6043
--- /dev/null
+++ b/tests/metal/simple-task.slang
@@ -0,0 +1,102 @@
+//TEST:SIMPLE(filecheck=CHECK): -entry taskMain -stage amplification -target metal
+
+//TEST_INPUT: ubuffer(data=[0 0 0 0], stride=4):out,name outputBuffer
+
+uniform RWStructuredBuffer<float> outputBuffer;
+
+cbuffer Uniforms
+{
+    float4x4 modelViewProjection;
+}
+
+//
+// Task shader
+//
+
+struct MeshPayload
+{
+    int exponent;
+};
+
+// CHECK: MeshPayload_0 object_data& _slang_mesh_payload
+// CHECK: mesh_grid_properties  _slang_mgp
+[numthreads(1,1,1)]
+void taskMain()
+{
+    // CHECK: _slang_mesh_payload
+    // CHECK: _slang_mgp.set_threadgroups_per_grid
+    MeshPayload p;
+    p.exponent = 3;
+    DispatchMesh(1, 1, 1, p);
+}
+
+//
+// Mesh shader
+//
+
+const static float2 positions[3] = {
+    float2(0.0, -0.5),
+    float2(0.5, 0.5),
+    float2(-0.5, 0.5)
+};
+
+const static float3 colors[3] = {
+    float3(1.0, 1.0, 0.0),
+    float3(0.0, 1.0, 1.0),
+    float3(1.0, 0.0, 1.0)
+};
+
+struct Vertex
+{
+    float4 pos : SV_Position;
+    float3 color : Color;
+    int index : Index;
+    int value : Value;
+};
+
+const static uint MAX_VERTS = 12;
+const static uint MAX_PRIMS = 4;
+
+[outputtopology("triangle")]
+[numthreads(12, 1, 1)]
+void meshMain(
+    in uint tig: SV_GroupIndex,
+    in payload MeshPayload meshPayload,
+    // Check that we correctly generate the specific 'in payload' that HLSL
+    // requires:
+    // HLSL: , in payload MeshPayload
+    OutputVertices<Vertex, MAX_VERTS> verts,
+    OutputIndices<uint3, MAX_PRIMS> triangles)
+{
+    const uint numVertices = 12;
+    const uint numPrimitives = 4;
+    SetMeshOutputCounts(numVertices, numPrimitives);
+
+    if (tig < numVertices)
+    {
+        const int tri = tig / 3;
+        verts[tig] = { float4(positions[tig % 3], 0, 1), colors[tig % 3], tri, int(pow(tri, meshPayload.exponent)) };
+    }
+
+    if (tig < numPrimitives)
+        triangles[tig] = tig * 3 + uint3(0, 1, 2);
+}
+
+//
+// Fragment Shader
+//
+
+struct Fragment
+{
+    float4 color : SV_Target;
+};
+
+Fragment fragmentMain(Vertex input)
+{
+    outputBuffer[input.index] = input.value;
+
+    Fragment output;
+    output.color = float4(input.color, 1.0);
+    return output;
+}
+