e7a8f85e4f
Bug: skia:11389 Change-Id: I3e24dcaa2cfeddc7efd7985f9f42a59bfc8175f2 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/385137 Reviewed-by: John Stiles <johnstiles@google.com> Commit-Queue: Jim Van Verth <jvanverth@google.com>
23 lines
831 B
Metal
23 lines
831 B
Metal
struct Inputs {
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float4 src;
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float4 dst;
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};
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struct Outputs {
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float4 sk_FragColor [[color(0)]];
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};
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float _blend_overlay_component(float2 s, float2 d) {
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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);
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}
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float4 blend_overlay(float4 src, float4 dst) {
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float4 result = float4(_blend_overlay_component(src.xw, dst.xw), _blend_overlay_component(src.yw, dst.yw), _blend_overlay_component(src.zw, dst.zw), src.w + (1.0 - src.w) * dst.w);
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result.xyz = result.xyz + dst.xyz * (1.0 - src.w) + src.xyz * (1.0 - dst.w);
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return result;
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}
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fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
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Outputs _out;
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(void)_out;
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_out.sk_FragColor = blend_overlay(_in.dst, _in.src);
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return _out;
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}
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