1#include <metal_stdlib> 2#include <simd/simd.h> 3#ifdef __clang__ 4#pragma clang diagnostic ignored "-Wall" 5#endif 6using namespace metal; 7struct Uniforms { 8 half4 src; 9 half4 dst; 10}; 11struct Inputs { 12}; 13struct Outputs { 14 half4 sk_FragColor [[color(0)]]; 15}; 16half blend_overlay_component_Qhh2h2(half2 s, half2 d); 17half4 blend_overlay_h4h4h4(half4 src, half4 dst); 18half blend_overlay_component_Qhh2h2(half2 s, half2 d) { 19 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); 20} 21half4 blend_overlay_h4h4h4(half4 src, half4 dst) { 22 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); 23 result.xyz = result.xyz + (dst.xyz * (1.0h - src.w) + src.xyz * (1.0h - dst.w)); 24 return result; 25} 26fragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { 27 Outputs _out; 28 (void)_out; 29 _out.sk_FragColor = blend_overlay_h4h4h4(_uniforms.dst, _uniforms.src); 30 return _out; 31} 32