| #include <metal_stdlib> |
| #include <simd/simd.h> |
| using namespace metal; |
| struct Inputs { |
| uint3 sk_ThreadPosition; |
| }; |
| struct Globals { |
| texture2d<half, access::read> src; |
| texture2d<half, access::write> dest; |
| }; |
| void desaturate_vTT(Inputs _in, texture2d<half, access::read> src, texture2d<half, access::write> dest) { |
| half4 color = src.read(_in.sk_ThreadPosition.xy); |
| color.xyz = half3(dot(color.xyz, half3(0.22h, 0.67h, 0.11h))); |
| dest.write(color, _in.sk_ThreadPosition.xy); |
| } |
| kernel void computeMain(texture2d<half, access::read> src [[texture(0)]], texture2d<half, access::write> dest [[texture(1)]], uint3 sk_ThreadPosition [[thread_position_in_grid]]) { |
| Globals _globals{src, dest}; |
| (void)_globals; |
| Inputs _in = { sk_ThreadPosition }; |
| if (_in.sk_ThreadPosition.x < _globals.src.get_width() && _in.sk_ThreadPosition.y < _globals.src.get_height()) { |
| desaturate_vTT(_in, _globals.src, _globals.dest); |
| } |
| return; |
| } |