xref: /aosp_15_r20/external/skia/tests/sksl/blend/BlendOverlay.metal (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)
1*c8dee2aaSAndroid Build Coastguard Worker#include <metal_stdlib>
2*c8dee2aaSAndroid Build Coastguard Worker#include <simd/simd.h>
3*c8dee2aaSAndroid Build Coastguard Worker#ifdef __clang__
4*c8dee2aaSAndroid Build Coastguard Worker#pragma clang diagnostic ignored "-Wall"
5*c8dee2aaSAndroid Build Coastguard Worker#endif
6*c8dee2aaSAndroid Build Coastguard Workerusing namespace metal;
7*c8dee2aaSAndroid Build Coastguard Workerstruct Uniforms {
8*c8dee2aaSAndroid Build Coastguard Worker    half4 src;
9*c8dee2aaSAndroid Build Coastguard Worker    half4 dst;
10*c8dee2aaSAndroid Build Coastguard Worker};
11*c8dee2aaSAndroid Build Coastguard Workerstruct Inputs {
12*c8dee2aaSAndroid Build Coastguard Worker};
13*c8dee2aaSAndroid Build Coastguard Workerstruct Outputs {
14*c8dee2aaSAndroid Build Coastguard Worker    half4 sk_FragColor [[color(0)]];
15*c8dee2aaSAndroid Build Coastguard Worker};
16*c8dee2aaSAndroid Build Coastguard Workerhalf blend_overlay_component_Qhh2h2(half2 s, half2 d);
17*c8dee2aaSAndroid Build Coastguard Workerhalf blend_overlay_component_Qhh2h2(half2 s, half2 d) {
18*c8dee2aaSAndroid Build Coastguard Worker    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);
19*c8dee2aaSAndroid Build Coastguard Worker}
20*c8dee2aaSAndroid Build Coastguard Workerfragment Outputs fragmentMain(Inputs _in [[stage_in]], constant Uniforms& _uniforms [[buffer(0)]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) {
21*c8dee2aaSAndroid Build Coastguard Worker    Outputs _out;
22*c8dee2aaSAndroid Build Coastguard Worker    (void)_out;
23*c8dee2aaSAndroid Build Coastguard Worker    half4 _0_result = half4(blend_overlay_component_Qhh2h2(_uniforms.src.xw, _uniforms.dst.xw), blend_overlay_component_Qhh2h2(_uniforms.src.yw, _uniforms.dst.yw), blend_overlay_component_Qhh2h2(_uniforms.src.zw, _uniforms.dst.zw), _uniforms.src.w + (1.0h - _uniforms.src.w) * _uniforms.dst.w);
24*c8dee2aaSAndroid Build Coastguard Worker    _0_result.xyz = _0_result.xyz + (_uniforms.dst.xyz * (1.0h - _uniforms.src.w) + _uniforms.src.xyz * (1.0h - _uniforms.dst.w));
25*c8dee2aaSAndroid Build Coastguard Worker    _out.sk_FragColor = _0_result;
26*c8dee2aaSAndroid Build Coastguard Worker    return _out;
27*c8dee2aaSAndroid Build Coastguard Worker}
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