1#include <metal_stdlib> 2#include <simd/simd.h> 3using namespace metal; 4constant const half sk_PrivkGuardedDivideEpsilon = half(false ? 1e-08 : 0.0); 5struct Uniforms { 6 half4 src; 7 half4 dst; 8}; 9struct Inputs { 10}; 11struct Outputs { 12 half4 sk_FragColor [[color(0)]]; 13}; 14half blend_color_saturation_Qhh3(half3 color); 15half4 blend_hslc_h4h2h4h4(half2 flipSat, half4 src, half4 dst); 16half blend_color_saturation_Qhh3(half3 color) { 17 return max(max(color.x, color.y), color.z) - min(min(color.x, color.y), color.z); 18} 19half4 blend_hslc_h4h2h4h4(half2 flipSat, half4 src, half4 dst) { 20 half alpha = dst.w * src.w; 21 half3 sda = src.xyz * dst.w; 22 half3 dsa = dst.xyz * src.w; 23 half3 l = bool(flipSat.x) ? dsa : sda; 24 half3 r = bool(flipSat.x) ? sda : dsa; 25 if (bool(flipSat.y)) { 26 half _2_mn = min(min(l.x, l.y), l.z); 27 half _3_mx = max(max(l.x, l.y), l.z); 28 l = _3_mx > _2_mn ? ((l - _2_mn) * blend_color_saturation_Qhh3(r)) / (_3_mx - _2_mn) : half3(0.0h); 29 r = dsa; 30 } 31 half _4_lum = dot(half3(0.3h, 0.59h, 0.11h), r); 32 half3 _5_result = (_4_lum - dot(half3(0.3h, 0.59h, 0.11h), l)) + l; 33 half _6_minComp = min(min(_5_result.x, _5_result.y), _5_result.z); 34 half _7_maxComp = max(max(_5_result.x, _5_result.y), _5_result.z); 35 if (_6_minComp < 0.0h && _4_lum != _6_minComp) { 36 _5_result = _4_lum + (_5_result - _4_lum) * (_4_lum / ((_4_lum - _6_minComp) + sk_PrivkGuardedDivideEpsilon)); 37 } 38 if (_7_maxComp > alpha && _7_maxComp != _4_lum) { 39 _5_result = _4_lum + ((_5_result - _4_lum) * (alpha - _4_lum)) / ((_7_maxComp - _4_lum) + sk_PrivkGuardedDivideEpsilon); 40 } 41 return half4((((_5_result + dst.xyz) - dsa) + src.xyz) - sda, (src.w + dst.w) - alpha); 42} 43fragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { 44 Outputs _out; 45 (void)_out; 46 _out.sk_FragColor = blend_hslc_h4h2h4h4(half2(0.0h, 1.0h), _uniforms.src, _uniforms.dst); 47 return _out; 48} 49