1#include <metal_stdlib> 2#include <simd/simd.h> 3#ifdef __clang__ 4#pragma clang diagnostic ignored "-Wall" 5#endif 6using namespace metal; 7constant const half sk_PrivkGuardedDivideEpsilon = half(false ? 1e-08 : 0.0); 8struct Uniforms { 9 half4 src; 10 half4 dst; 11}; 12struct Inputs { 13}; 14struct Outputs { 15 half4 sk_FragColor [[color(0)]]; 16}; 17half soft_light_component_Qhh2h2(half2 s, half2 d); 18half soft_light_component_Qhh2h2(half2 s, half2 d) { 19 if (2.0h * s.x <= s.y) { 20 return (((d.x * d.x) * (s.y - 2.0h * s.x)) / (d.y + sk_PrivkGuardedDivideEpsilon) + (1.0h - d.y) * s.x) + d.x * ((-s.y + 2.0h * s.x) + 1.0h); 21 } else if (4.0h * d.x <= d.y) { 22 half DSqd = d.x * d.x; 23 half DCub = DSqd * d.x; 24 half DaSqd = d.y * d.y; 25 half DaCub = DaSqd * d.y; 26 return (((DaSqd * (s.x - d.x * ((3.0h * s.y - 6.0h * s.x) - 1.0h)) + ((12.0h * d.y) * DSqd) * (s.y - 2.0h * s.x)) - (16.0h * DCub) * (s.y - 2.0h * s.x)) - DaCub * s.x) / (DaSqd + sk_PrivkGuardedDivideEpsilon); 27 } else { 28 return ((d.x * ((s.y - 2.0h * s.x) + 1.0h) + s.x) - sqrt(d.y * d.x) * (s.y - 2.0h * s.x)) - d.y * s.x; 29 } 30} 31fragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { 32 Outputs _out; 33 (void)_out; 34 _out.sk_FragColor = _uniforms.dst.w == 0.0h ? _uniforms.src : half4(soft_light_component_Qhh2h2(_uniforms.src.xw, _uniforms.dst.xw), soft_light_component_Qhh2h2(_uniforms.src.yw, _uniforms.dst.yw), soft_light_component_Qhh2h2(_uniforms.src.zw, _uniforms.dst.zw), _uniforms.src.w + (1.0h - _uniforms.src.w) * _uniforms.dst.w); 35 return _out; 36} 37