#include #include #ifdef __clang__ #pragma clang diagnostic ignored "-Wall" #endif using namespace metal; struct Uniforms { half4 src; half4 dst; }; struct Inputs { }; struct Outputs { half4 sk_FragColor [[color(0)]]; }; half blend_overlay_component_Qhh2h2(half2 s, half2 d); half4 blend_overlay_h4h4h4(half4 src, half4 dst); half blend_overlay_component_Qhh2h2(half2 s, half2 d) { return 2.0h * d.x <= d.y ? (2.0h * s.x) * d.x : s.y * d.y - (2.0h * (d.y - d.x)) * (s.y - s.x); } half4 blend_overlay_h4h4h4(half4 src, half4 dst) { half4 result = half4(blend_overlay_component_Qhh2h2(src.xw, dst.xw), blend_overlay_component_Qhh2h2(src.yw, dst.yw), blend_overlay_component_Qhh2h2(src.zw, dst.zw), src.w + (1.0h - src.w) * dst.w); result.xyz = result.xyz + (dst.xyz * (1.0h - src.w) + src.xyz * (1.0h - 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; }