| #include <metal_stdlib> |
| #include <simd/simd.h> |
| 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; |
| } |
| float _color_dodge_component_hh2h2(float2 s, float2 d) { |
| if (d.x == 0.0) { |
| return s.x * (1.0 - d.y); |
| } else { |
| float delta = s.y - s.x; |
| if (delta == 0.0) { |
| return (s.y * d.y + s.x * (1.0 - d.y)) + d.x * (1.0 - s.y); |
| } else { |
| delta = min(d.y, (d.x * s.y) / delta); |
| return (delta * s.y + s.x * (1.0 - d.y)) + d.x * (1.0 - s.y); |
| } |
| } |
| } |
| float _color_burn_component_hh2h2(float2 s, float2 d) { |
| if (d.y == d.x) { |
| return (s.y * d.y + s.x * (1.0 - d.y)) + d.x * (1.0 - s.y); |
| } else if (s.x == 0.0) { |
| return d.x * (1.0 - s.y); |
| } else { |
| float delta = max(0.0, d.y - ((d.y - d.x) * s.y) / s.x); |
| return (delta * s.y + s.x * (1.0 - d.y)) + d.x * (1.0 - s.y); |
| } |
| } |
| float _soft_light_component_hh2h2(float2 s, float2 d) { |
| if (2.0 * s.x <= s.y) { |
| return (((d.x * d.x) * (s.y - 2.0 * s.x)) / d.y + (1.0 - d.y) * s.x) + d.x * ((-s.y + 2.0 * s.x) + 1.0); |
| } else if (4.0 * d.x <= d.y) { |
| float DSqd = d.x * d.x; |
| float DCub = DSqd * d.x; |
| float DaSqd = d.y * d.y; |
| float DaCub = DaSqd * d.y; |
| return (((DaSqd * (s.x - d.x * ((3.0 * s.y - 6.0 * s.x) - 1.0)) + ((12.0 * d.y) * DSqd) * (s.y - 2.0 * s.x)) - (16.0 * DCub) * (s.y - 2.0 * s.x)) - DaCub * s.x) / DaSqd; |
| } else { |
| return ((d.x * ((s.y - 2.0 * s.x) + 1.0) + s.x) - sqrt(d.y * d.x) * (s.y - 2.0 * s.x)) - d.y * s.x; |
| } |
| } |
| float3 _blend_set_color_luminance_h3h3hh3(float3 hueSatColor, float alpha, float3 lumColor) { |
| float lum = dot(float3(0.30000001192092896, 0.5899999737739563, 0.10999999940395355), lumColor); |
| float3 result = (lum - dot(float3(0.30000001192092896, 0.5899999737739563, 0.10999999940395355), hueSatColor)) + hueSatColor; |
| float minComp = min(min(result.x, result.y), result.z); |
| float maxComp = max(max(result.x, result.y), result.z); |
| if (minComp < 0.0 && lum != minComp) { |
| result = lum + (result - lum) * (lum / (lum - minComp)); |
| } |
| if (maxComp > alpha && maxComp != lum) { |
| return lum + ((result - lum) * (alpha - lum)) / (maxComp - lum); |
| } else { |
| return result; |
| } |
| } |
| float3 _blend_set_color_saturation_helper_h3h3h(float3 minMidMax, float sat) { |
| if (minMidMax.x < minMidMax.z) { |
| return float3(0.0, (sat * (minMidMax.y - minMidMax.x)) / (minMidMax.z - minMidMax.x), sat); |
| } else { |
| return float3(0.0); |
| } |
| } |
| float3 _blend_set_color_saturation_h3h3h3(float3 hueLumColor, float3 satColor) { |
| float sat = max(max(satColor.x, satColor.y), satColor.z) - min(min(satColor.x, satColor.y), satColor.z); |
| if (hueLumColor.x <= hueLumColor.y) { |
| if (hueLumColor.y <= hueLumColor.z) { |
| return _blend_set_color_saturation_helper_h3h3h(hueLumColor, sat); |
| } else if (hueLumColor.x <= hueLumColor.z) { |
| return _blend_set_color_saturation_helper_h3h3h(hueLumColor.xzy, sat).xzy; |
| } else { |
| return _blend_set_color_saturation_helper_h3h3h(hueLumColor.zxy, sat).yzx; |
| } |
| } else if (hueLumColor.x <= hueLumColor.z) { |
| return _blend_set_color_saturation_helper_h3h3h(hueLumColor.yxz, sat).yxz; |
| } else if (hueLumColor.y <= hueLumColor.z) { |
| return _blend_set_color_saturation_helper_h3h3h(hueLumColor.yzx, sat).zxy; |
| } else { |
| return _blend_set_color_saturation_helper_h3h3h(hueLumColor.zyx, sat).zyx; |
| } |
| } |
| float4 blend_h4eh4h4(int mode, float4 src, float4 dst) { |
| switch (mode) { |
| case 0: |
| return float4(0.0); |
| case 1: |
| return src; |
| case 2: |
| return dst; |
| case 3: |
| return src + (1.0 - src.w) * dst; |
| case 4: |
| return (1.0 - dst.w) * src + dst; |
| case 5: |
| return src * dst.w; |
| case 6: |
| return dst * src.w; |
| case 7: |
| return (1.0 - dst.w) * src; |
| case 8: |
| return (1.0 - src.w) * dst; |
| case 9: |
| return dst.w * src + (1.0 - src.w) * dst; |
| case 10: |
| return (1.0 - dst.w) * src + src.w * dst; |
| case 11: |
| return (1.0 - dst.w) * src + (1.0 - src.w) * dst; |
| case 12: |
| return min(src + dst, 1.0); |
| case 13: |
| return src * dst; |
| case 14: |
| return src + (1.0 - src) * dst; |
| case 15: |
| return blend_overlay_h4h4h4(src, dst); |
| case 16: |
| float4 _0_result = src + (1.0 - src.w) * dst; |
| _0_result.xyz = min(_0_result.xyz, (1.0 - dst.w) * src.xyz + dst.xyz); |
| return _0_result; |
| case 17: |
| float4 _1_result = src + (1.0 - src.w) * dst; |
| _1_result.xyz = max(_1_result.xyz, (1.0 - dst.w) * src.xyz + dst.xyz); |
| return _1_result; |
| case 18: |
| return float4(_color_dodge_component_hh2h2(src.xw, dst.xw), _color_dodge_component_hh2h2(src.yw, dst.yw), _color_dodge_component_hh2h2(src.zw, dst.zw), src.w + (1.0 - src.w) * dst.w); |
| case 19: |
| return float4(_color_burn_component_hh2h2(src.xw, dst.xw), _color_burn_component_hh2h2(src.yw, dst.yw), _color_burn_component_hh2h2(src.zw, dst.zw), src.w + (1.0 - src.w) * dst.w); |
| case 20: |
| return blend_overlay_h4h4h4(dst, src); |
| case 21: |
| return dst.w == 0.0 ? src : float4(_soft_light_component_hh2h2(src.xw, dst.xw), _soft_light_component_hh2h2(src.yw, dst.yw), _soft_light_component_hh2h2(src.zw, dst.zw), src.w + (1.0 - src.w) * dst.w); |
| case 22: |
| return float4((src.xyz + dst.xyz) - 2.0 * min(src.xyz * dst.w, dst.xyz * src.w), src.w + (1.0 - src.w) * dst.w); |
| case 23: |
| return float4((dst.xyz + src.xyz) - (2.0 * dst.xyz) * src.xyz, src.w + (1.0 - src.w) * dst.w); |
| case 24: |
| return float4(((1.0 - src.w) * dst.xyz + (1.0 - dst.w) * src.xyz) + src.xyz * dst.xyz, src.w + (1.0 - src.w) * dst.w); |
| case 25: |
| float _2_alpha = dst.w * src.w; |
| float3 _3_sda = src.xyz * dst.w; |
| float3 _4_dsa = dst.xyz * src.w; |
| return float4((((_blend_set_color_luminance_h3h3hh3(_blend_set_color_saturation_h3h3h3(_3_sda, _4_dsa), _2_alpha, _4_dsa) + dst.xyz) - _4_dsa) + src.xyz) - _3_sda, (src.w + dst.w) - _2_alpha); |
| case 26: |
| float _5_alpha = dst.w * src.w; |
| float3 _6_sda = src.xyz * dst.w; |
| float3 _7_dsa = dst.xyz * src.w; |
| return float4((((_blend_set_color_luminance_h3h3hh3(_blend_set_color_saturation_h3h3h3(_7_dsa, _6_sda), _5_alpha, _7_dsa) + dst.xyz) - _7_dsa) + src.xyz) - _6_sda, (src.w + dst.w) - _5_alpha); |
| case 27: |
| float _8_alpha = dst.w * src.w; |
| float3 _9_sda = src.xyz * dst.w; |
| float3 _10_dsa = dst.xyz * src.w; |
| return float4((((_blend_set_color_luminance_h3h3hh3(_9_sda, _8_alpha, _10_dsa) + dst.xyz) - _10_dsa) + src.xyz) - _9_sda, (src.w + dst.w) - _8_alpha); |
| case 28: |
| float _11_alpha = dst.w * src.w; |
| float3 _12_sda = src.xyz * dst.w; |
| float3 _13_dsa = dst.xyz * src.w; |
| return float4((((_blend_set_color_luminance_h3h3hh3(_13_dsa, _11_alpha, _12_sda) + dst.xyz) - _13_dsa) + src.xyz) - _12_sda, (src.w + dst.w) - _11_alpha); |
| default: |
| return float4(0.0); |
| } |
| } |
| |
| 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_h4eh4h4(13, _uniforms.src, _uniforms.dst); |
| return _out; |
| } |
