#include #include using namespace metal; struct Uniforms { float4 src; float4 dst; }; struct Inputs { }; struct Outputs { float4 sk_FragColor [[color(0)]]; }; float _blend_overlay_component_hh2h2(float2 s, float2 d) { return 2.0 * d.x <= d.y ? (2.0 * s.x) * d.x : s.y * d.y - (2.0 * (d.y - d.x)) * (s.y - s.x); } float4 blend_overlay_h4h4h4(float4 src, float4 dst) { float4 result = float4(_blend_overlay_component_hh2h2(src.xw, dst.xw), _blend_overlay_component_hh2h2(src.yw, dst.yw), _blend_overlay_component_hh2h2(src.zw, dst.zw), src.w + (1.0 - src.w) * dst.w); result.xyz = result.xyz + dst.xyz * (1.0 - src.w) + src.xyz * (1.0 - dst.w); return result; } 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 = blend_overlay_h4h4h4(_uniforms.dst, _uniforms.src); return _out; }