#include #include using namespace metal; struct Uniforms { float4 src; float4 dst; }; struct Inputs { }; struct Outputs { float4 sk_FragColor [[color(0)]]; }; fragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { Outputs _out; (void)_out; _out.sk_FragColor = float4((_uniforms.src.xyz + _uniforms.dst.xyz) - 2.0 * min(_uniforms.src.xyz * _uniforms.dst.w, _uniforms.dst.xyz * _uniforms.src.w), _uniforms.src.w + (1.0 - _uniforms.src.w) * _uniforms.dst.w); return _out; }