Atlas - SDL_shaders_metal.metal
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[FILE BEGIN]
1#include <metal_texture>
2#include <metal_matrix>
3
4using namespace metal;
5
6struct SolidVertexOutput
7{
8    float4 position [[position]];
9    float pointSize [[point_size]];
10};
11
12vertex SolidVertexOutput SDL_Solid_vertex(const device float2 *position [[buffer(0)]],
13                                          constant float4x4 &projection [[buffer(2)]],
14                                          constant float4x4 &transform [[buffer(3)]],
15                                          uint vid [[vertex_id]])
16{
17    SolidVertexOutput v;
18    v.position = (projection * transform) * float4(position[vid], 0.0f, 1.0f);
19    v.pointSize = 1.0f;
20    return v;
21}
22
23fragment float4 SDL_Solid_fragment(constant float4 &col [[buffer(0)]])
24{
25    return col;
26}
27
28struct CopyVertexOutput
29{
30    float4 position [[position]];
31    float2 texcoord;
32};
33
34vertex CopyVertexOutput SDL_Copy_vertex(const device float2 *position [[buffer(0)]],
35                                        const device float2 *texcoords [[buffer(1)]],
36                                        constant float4x4 &projection [[buffer(2)]],
37                                        constant float4x4 &transform [[buffer(3)]],
38                                        uint vid [[vertex_id]])
39{
40    CopyVertexOutput v;
41    v.position = (projection * transform) * float4(position[vid], 0.0f, 1.0f);
42    v.texcoord = texcoords[vid];
43    return v;
44}
45
46fragment float4 SDL_Copy_fragment(CopyVertexOutput vert [[stage_in]],
47                                  constant float4 &col [[buffer(0)]],
48                                  texture2d<float> tex [[texture(0)]],
49                                  sampler s [[sampler(0)]])
50{
51    return tex.sample(s, vert.texcoord) * col;
52}
53
54struct YUVDecode
55{
56    float3 offset;
57    float3 Rcoeff;
58    float3 Gcoeff;
59    float3 Bcoeff;
60};
61
62fragment float4 SDL_YUV_fragment(CopyVertexOutput vert [[stage_in]],
63                                 constant float4 &col [[buffer(0)]],
64                                 constant YUVDecode &decode [[buffer(1)]],
65                                 texture2d<float> texY [[texture(0)]],
66                                 texture2d_array<float> texUV [[texture(1)]],
67                                 sampler s [[sampler(0)]])
68{
69    float3 yuv;
70    yuv.x = texY.sample(s, vert.texcoord).r;
71    yuv.y = texUV.sample(s, vert.texcoord, 0).r;
72    yuv.z = texUV.sample(s, vert.texcoord, 1).r;
73
74    yuv += decode.offset;
75
76    return col * float4(dot(yuv, decode.Rcoeff), dot(yuv, decode.Gcoeff), dot(yuv, decode.Bcoeff), 1.0);
77}
78
79fragment float4 SDL_NV12_fragment(CopyVertexOutput vert [[stage_in]],
80                                 constant float4 &col [[buffer(0)]],
81                                 constant YUVDecode &decode [[buffer(1)]],
82                                 texture2d<float> texY [[texture(0)]],
83                                 texture2d<float> texUV [[texture(1)]],
84                                 sampler s [[sampler(0)]])
85{
86    float3 yuv;
87    yuv.x = texY.sample(s, vert.texcoord).r;
88    yuv.yz = texUV.sample(s, vert.texcoord).rg;
89
90    yuv += decode.offset;
91
92    return col * float4(dot(yuv, decode.Rcoeff), dot(yuv, decode.Gcoeff), dot(yuv, decode.Bcoeff), 1.0);
93}
94
95fragment float4 SDL_NV21_fragment(CopyVertexOutput vert [[stage_in]],
96                                 constant float4 &col [[buffer(0)]],
97                                 constant YUVDecode &decode [[buffer(1)]],
98                                 texture2d<float> texY [[texture(0)]],
99                                 texture2d<float> texUV [[texture(1)]],
100                                 sampler s [[sampler(0)]])
101{
102    float3 yuv;
103    yuv.x = texY.sample(s, vert.texcoord).r;
104    yuv.yz = texUV.sample(s, vert.texcoord).gr;
105
106    yuv += decode.offset;
107
108    return col * float4(dot(yuv, decode.Rcoeff), dot(yuv, decode.Gcoeff), dot(yuv, decode.Bcoeff), 1.0);
109}
110
[FILE END]
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