yum-mirror/slang

Making it easier to work with shaders

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

Yong HeMap `SV_InstanceID` to `gl_InstanceIndex-gl_BaseInstance` (#6468)6f2ce72b0

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1//TEST:SIMPLE(filecheck=CHECK): -target spirv -fvk-use-entrypoint-name -emit-spirv-directly
2
3// CHECK-DAG: OpEntryPoint Vertex
4// CHECK-DAG: OpEntryPoint Fragment
5
6// We require 1 `Flat` for the fragment input `uint`
7// CHECK-DAG: OpDecorate %{{[1-9][0-9]*}} Flat
8
9// CHECK-DAG: OpDecorate %gl_InstanceIndex BuiltIn InstanceIndex
10
11// The vertex shader should be using the builtin InstanceIndex var.
12// CHECK: %vmain = OpFunction
13// CHECK: InstanceIndex
14// CHECK: OpFunctionEnd
15
16// The fragment shader should not be using the builtin InstanceIndex var.
17// CHECK: %pmain = OpFunction
18// CHECK-NOT: InstanceIndex
19// CHECK: OpFunctionEnd
20
21struct VIn
22{
23    uint instanceID : SV_InstanceID;
24}
25
26struct VSOutput
27{
28    uint instanceID : SV_InstanceID;
29	float4 color : COLOR;
30};
31
32[shader("vertex")]
33VSOutput vmain(VIn vin) {
34    VSOutput t;
35    t.instanceID = vin.instanceID;
36    t.color = float4(0, 0, 0, 0);
37    return t;
38}
39
40[shader("pixel")]
41float4 pmain(VSOutput input) : SV_TARGET
42{
43	return float4(float(input.instanceID), input.color.xyz);
44}