yum-mirror/slang

Making it easier to work with shaders

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

Yong HeFix lowering of `extern` types with defaults. (#6512)2aaa91007

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1//TEST:SIMPLE(filecheck=CHECK): -target spirv
2
3// CHECK: OpEntryPoint
4
5static extern const bool _AlphaTest = false;
6static extern const bool _BaseColorMap = false;
7static extern const bool _NormalMap = false;
8static extern const bool _EmissiveMap = false;
9static extern const bool _MetallicRoughnessMap = false;
10
11interface IVertexInput
12{
13    float3 GetPosition();
14    float3 GetNormal();
15    float4 GetTangent();
16    float2 GetUV();
17    float4 GetBone();
18}
19
20struct StandardVertexInput : IVertexInput
21{
22    float3 position;
23    float3 normal;
24    float4 tangent;
25    float2 uv;
26
27    float3 GetPosition() {return position;}
28    float3 GetNormal() {return normal;}
29    float4 GetTangent() {return tangent;}
30    float2 GetUV() { return uv;}
31    float4 GetBone() { return float4(0,0,0,0);}
32}
33
34extern struct VertexInput : IVertexInput = StandardVertexInput;
35
36struct PushConstant
37{
38    float4x4 model;
39    float4x4 invTspModel;
40} 
41
42[vk_push_constant]
43PushConstant pconst;
44
45struct VertexOutput
46{
47    float4 position : SV_Position;
48    float3 positionWS;
49    float3 normalWS;
50    float3 tangentWS;
51    float3 bitangentWS;
52    float2 uv;
53}
54
55
56
57VertexOutput SceneLitVertex(VertexInput input)
58{
59    VertexOutput output;
60    float3 vertexPos = input.GetPosition();
61    float3 normal = input.GetNormal();
62    float4 tangent = input.GetTangent();
63
64    output.positionWS = mul(pconst.model, float4(vertexPos, 1)).xyz;
65
66    matrix<float,3,3> model33 = (float3x3)pconst.invTspModel;
67    output.normalWS = mul(model33, normal).xyz;
68    output.tangentWS = mul(model33, tangent.xyz);
69    output.bitangentWS = tangent.w * cross(output.normalWS, output.tangentWS);
70    output.uv = input.GetUV();
71
72    float4x4 vp = {};
73    output.position = mul(vp, float4(output.positionWS, 1));
74
75    return output;
76}
77
78
79[shader("vertex")]
80VertexOutput VertexMain(VertexInput input)
81{
82    return SceneLitVertex(input);
83}
84
85struct PerMaterial
86{
87    float4 baseColorFactor;
88    float4 emissive;
89    float roughness;
90    float metallic;
91    float alphaCutoff;
92
93    Sampler2D baseColorTex;
94    Sampler2D normalMap;
95    Sampler2D metallicRoughnessMap;
96    Sampler2D emissiveMap;
97};
98
99ParameterBlock<PerMaterial> perMaterial;
100
101struct FragmentOutput
102{
103    float4 color : SV_Target0;
104}
105
106FragmentOutput SceneLitFragment(VertexOutput input)
107{
108    FragmentOutput output;
109    output.color = 0;
110
111    return output;
112}
113
114[shader("fragment")]
115FragmentOutput FragmentMain(VertexOutput input)
116{
117    return SceneLitFragment(input);
118}