1#include <metal_stdlib> 2#include <simd/simd.h> 3using namespace metal; 4struct Uniforms { 5 float4 src; 6 float4 dst; 7}; 8struct Inputs { 9}; 10struct Outputs { 11 float4 sk_FragColor [[color(0)]]; 12}; 13 14fragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { 15 Outputs _out; 16 (void)_out; 17 _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); 18 return _out; 19} 20