tests/sksl/blend/golden/BlendDifference.metal

#include <metal_stdlib>
#include <simd/simd.h>
using namespace metal;
struct Inputs {
    float4 srcdst;
};
struct Outputs {
    float4 sk_FragColor [[color(0)]];
};

float4 blend_difference(float4 src, float4 dst) {
    return float4((src.xyz + dst.xyz) - 2.0 * min(src.xyz * dst.w, dst.xyz * src.w), src.w + (1.0 - src.w) * dst.w);
}
fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
    Outputs _outputStruct;
    thread Outputs* _out = &_outputStruct;
    float4 _0_blend_difference;
    {
        _0_blend_difference = float4((_in.src.xyz + _in.dst.xyz) - 2.0 * min(_in.src.xyz * _in.dst.w, _in.dst.xyz * _in.src.w), _in.src.w + (1.0 - _in.src.w) * _in.dst.w);
    }

    _out->sk_FragColor = _0_blend_difference;

    return *_out;
}