yum-mirror/slang

Making it easier to work with shaders

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

Darren WihandiMap `SV_VertexID` to `gl_VertexIndex-gl_BaseVertex`, add `SV_Vulkan*ID` semantics (#7150)634e3960c

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1//TEST:SIMPLE(filecheck=SPIRV): -entry main -stage vertex -target spirv -emit-spirv-directly
2//TEST:SIMPLE(filecheck=GLSL): -entry main -stage vertex -target glsl
3//TEST:SIMPLE(filecheck=METAL): -entry main -stage vertex -target metal
4//TEST:SIMPLE(filecheck=WGSL): -entry main -stage vertex -target wgsl
5
6struct VSInput
7{
8    uint vertexID : SV_VulkanVertexID;
9    uint instanceID : SV_VulkanInstanceID;
10};
11
12struct VSOutput
13{
14    float4 position : SV_POSITION;
15};
16
17[shader("vertex")]
18VSOutput main(VSInput input)
19{
20    VSOutput output;
21    output.position = float4(input.vertexID + input.instanceID);
22
23    // SPIRV-DAG: BuiltIn InstanceIndex
24    // SPIRV-DAG: BuiltIn VertexIndex
25    // SPIRV-NOT: BuiltIn BaseInstance
26    // SPIRV-NOT: BuiltIn BaseVertex
27
28    // GLSL-NOT: GL_ARB_shader_draw_parameters
29    // GLSL-DAG: gl_VertexIndex
30    // GLSL-NOT: gl_BaseVertex
31    // GLSL-DAG: gl_InstanceIndex
32    // GLSL-NOT: gl_BaseInstance
33
34    // METAL-DAG: vertex_id
35    // METAL-DAG: instance_id
36
37    // WGSL-DAG: vertex_index
38    // WGSL-DAG: instance_index
39
40    return output;
41}
42