61 lines
2.7 KiB
Metal
61 lines
2.7 KiB
Metal
#include <metal_stdlib>
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#include <simd/simd.h>
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using namespace metal;
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struct Uniforms {
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half4 src;
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half4 dst;
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};
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struct Inputs {
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};
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struct Outputs {
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half4 sk_FragColor [[color(0)]];
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};
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half3 blend_set_color_luminance_Qh3h3hh3(half3 hueSatColor, half alpha, half3 lumColor) {
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half lum = dot(half3(0.30000001192092896h, 0.5899999737739563h, 0.10999999940395355h), lumColor);
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half3 result = (lum - dot(half3(0.30000001192092896h, 0.5899999737739563h, 0.10999999940395355h), hueSatColor)) + hueSatColor;
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half minComp = min(min(result.x, result.y), result.z);
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half maxComp = max(max(result.x, result.y), result.z);
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if (minComp < 0.0h && lum != minComp) {
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result = lum + (result - lum) * (lum / (lum - minComp));
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}
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if (maxComp > alpha && maxComp != lum) {
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return lum + ((result - lum) * (alpha - lum)) / (maxComp - lum);
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} else {
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return result;
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}
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}
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half3 blend_set_color_saturation_helper_Qh3h3h(half3 minMidMax, half sat) {
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if (minMidMax.x < minMidMax.z) {
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return half3(0.0h, (sat * (minMidMax.y - minMidMax.x)) / (minMidMax.z - minMidMax.x), sat);
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} else {
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return half3(0.0h);
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}
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}
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half3 blend_set_color_saturation_Qh3h3h3(half3 hueLumColor, half3 satColor) {
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half sat = max(max(satColor.x, satColor.y), satColor.z) - min(min(satColor.x, satColor.y), satColor.z);
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if (hueLumColor.x <= hueLumColor.y) {
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if (hueLumColor.y <= hueLumColor.z) {
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return blend_set_color_saturation_helper_Qh3h3h(hueLumColor, sat);
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} else if (hueLumColor.x <= hueLumColor.z) {
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return blend_set_color_saturation_helper_Qh3h3h(hueLumColor.xzy, sat).xzy;
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} else {
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return blend_set_color_saturation_helper_Qh3h3h(hueLumColor.zxy, sat).yzx;
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}
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} else if (hueLumColor.x <= hueLumColor.z) {
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return blend_set_color_saturation_helper_Qh3h3h(hueLumColor.yxz, sat).yxz;
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} else if (hueLumColor.y <= hueLumColor.z) {
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return blend_set_color_saturation_helper_Qh3h3h(hueLumColor.yzx, sat).zxy;
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} else {
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return blend_set_color_saturation_helper_Qh3h3h(hueLumColor.zyx, sat).zyx;
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}
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}
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fragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
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Outputs _out;
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(void)_out;
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half _0_alpha = _uniforms.dst.w * _uniforms.src.w;
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half3 _1_sda = _uniforms.src.xyz * _uniforms.dst.w;
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half3 _2_dsa = _uniforms.dst.xyz * _uniforms.src.w;
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_out.sk_FragColor = half4((((blend_set_color_luminance_Qh3h3hh3(blend_set_color_saturation_Qh3h3h3(_1_sda, _2_dsa), _0_alpha, _2_dsa) + _uniforms.dst.xyz) - _2_dsa) + _uniforms.src.xyz) - _1_sda, (_uniforms.src.w + _uniforms.dst.w) - _0_alpha);
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return _out;
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}
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