yum-mirror/slang

Making it easier to work with shaders

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

Anders LeinoMigrate render-test away from deprecated compile request API (#6514)f4d5372d3

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1// constexpr.slang
2//TEST(compute):COMPARE_COMPUTE_EX:-slang -gcompute -shaderobj
3//DISABLED://TEST(compute, vulkan):COMPARE_COMPUTE_EX:-vk -gcompute -shaderobj
4//TEST(compute):COMPARE_COMPUTE_EX:-mtl -gcompute -shaderobj
5//TEST(compute):COMPARE_COMPUTE_EX:-wgpu -gcompute -shaderobj
6
7//TEST_INPUT: Texture2D(size=4, content = one):name tex
8//TEST_INPUT: Sampler:name samp
9//TEST_INPUT: ubuffer(data=[0 0], stride=4):out,name outputBuffer
10
11// Note: Vulkan version of this test is disabled pending adding
12// support for rendering tests to the harness.
13
14Texture2D tex;
15SamplerState samp;
16RWStructuredBuffer<float> outputBuffer;
17
18cbuffer Uniforms
19{
20	float4x4 modelViewProjection;
21}
22
23struct AssembledVertex
24{
25	float3	position;
26	float3	color;
27    float2  uv;
28};
29
30struct CoarseVertex
31{
32	float3	color;
33    float2  uv;
34};
35
36struct Fragment
37{
38	float4 color;
39};
40
41
42// Vertex  Shader
43
44struct VertexStageInput
45{
46	AssembledVertex assembledVertex	: A;
47};
48
49struct VertexStageOutput
50{
51	CoarseVertex	coarseVertex	: CoarseVertex;
52	float4			sv_position		: SV_Position;
53};
54
55[shader("vertex")]
56VertexStageOutput vertexMain(VertexStageInput input)
57{
58	VertexStageOutput output;
59
60	float3 position = input.assembledVertex.position;
61	float3 color	= input.assembledVertex.color;
62
63	output.coarseVertex.color = color;
64	output.sv_position = mul(modelViewProjection, float4(position, 1.0));
65    output.coarseVertex.uv = input.assembledVertex.uv;
66	return output;
67}
68
69// Fragment Shader
70
71struct FragmentStageInput
72{
73	CoarseVertex	coarseVertex	: CoarseVertex;
74};
75
76struct FragmentStageOutput
77{
78	Fragment fragment	: SV_Target;
79};
80
81[shader("fragment")]
82FragmentStageOutput fragmentMain(FragmentStageInput input)
83{
84	// The texel offset argument to `Texture2D.Sample` is
85	// required to be `constexpr`. This test is going to
86	// check that we correctly propagate this constraint
87	// backward to the value `a`.
88	//
89	// Because the HLSL compiler(s) already do this kind
90	// of propagation, the only real way to test this
91	// will be to target Vulkan, where the standard
92	// GLSL compiler gives an error message rather than
93	// infer `const`-ness.
94
95	uint a = 0;
96	constexpr uint b = 1;
97
98	uint2 ab = uint2(a,b);
99
100	FragmentStageOutput output;
101
102	float3 color = input.coarseVertex.color;
103    float2 uv = input.coarseVertex.uv;
104	output.fragment.color = float4(color, 1.0);
105
106	float4 val = float4(color, 1.0);
107	val = val - 16*tex.Sample(samp, uv, int2(ab));
108
109	outputBuffer[0] = 1;
110
111	if(val.x < 0)
112		discard;
113
114	outputBuffer[1] = 1;
115	return output;
116}