xref: /aosp_15_r20/external/skia/tests/sksl/blend/BlendSaturation.wgsl (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17)

diagnostic(off, derivative_uniformity);
diagnostic(off, chromium.unreachable_code);
struct FSOut {
  @location(0) sk_FragColor: vec4<f32>,
};
struct _GlobalUniforms {
  src: vec4<f32>,
  dst: vec4<f32>,
};
@binding(0) @group(0) var<uniform> _globalUniforms: _GlobalUniforms;
const sk_PrivkGuardedDivideEpsilon: f32 = f32(select(0.0, 1e-08, false));
const sk_PrivkMinNormalHalf: f32 = 6.10351562e-05;
fn blend_color_saturation_Qhh3(color: vec3<f32>) -> f32 {
  {
    let _skTemp0 = max(color.x, color.y);
    let _skTemp1 = max(_skTemp0, color.z);
    let _skTemp2 = min(color.x, color.y);
    let _skTemp3 = min(_skTemp2, color.z);
    return _skTemp1 - _skTemp3;
  }
}
fn blend_hslc_h4h2h4h4(flipSat: vec2<f32>, src: vec4<f32>, dst: vec4<f32>) -> vec4<f32> {
  {
    let alpha: f32 = dst.w * src.w;
    let sda: vec3<f32> = src.xyz * dst.w;
    let dsa: vec3<f32> = dst.xyz * src.w;
    var l: vec3<f32> = select(sda, dsa, vec3<bool>(bool(flipSat.x)));
    var r: vec3<f32> = select(dsa, sda, vec3<bool>(bool(flipSat.x)));
    if bool(flipSat.y) {
      {
        let _skTemp4 = min(l.x, l.y);
        let _skTemp5 = min(_skTemp4, l.z);
        let _2_mn: f32 = _skTemp5;
        let _skTemp6 = max(l.x, l.y);
        let _skTemp7 = max(_skTemp6, l.z);
        let _3_mx: f32 = _skTemp7;
        var _skTemp8: vec3<f32>;
        if _3_mx > _2_mn {
          let _skTemp9 = blend_color_saturation_Qhh3(r);
          _skTemp8 = ((l - _2_mn) * _skTemp9) / (_3_mx - _2_mn);
        } else {
          _skTemp8 = vec3<f32>(0.0);
        }
        l = _skTemp8;
        r = dsa;
      }
    }
    let _skTemp10 = dot(vec3<f32>(0.3, 0.59, 0.11), r);
    let _4_lum: f32 = _skTemp10;
    let _skTemp11 = dot(vec3<f32>(0.3, 0.59, 0.11), l);
    var _5_result: vec3<f32> = (_4_lum - _skTemp11) + l;
    let _skTemp12 = min(_5_result.x, _5_result.y);
    let _skTemp13 = min(_skTemp12, _5_result.z);
    let _6_minComp: f32 = _skTemp13;
    let _skTemp14 = max(_5_result.x, _5_result.y);
    let _skTemp15 = max(_skTemp14, _5_result.z);
    let _7_maxComp: f32 = _skTemp15;
    if (_6_minComp < 0.0) && (_4_lum != _6_minComp) {
      {
        _5_result = _4_lum + (_5_result - _4_lum) * (_4_lum / (((_4_lum - _6_minComp) + sk_PrivkMinNormalHalf) + sk_PrivkGuardedDivideEpsilon));
      }
    }
    if (_7_maxComp > alpha) && (_7_maxComp != _4_lum) {
      {
        _5_result = _4_lum + ((_5_result - _4_lum) * (alpha - _4_lum)) / (((_7_maxComp - _4_lum) + sk_PrivkMinNormalHalf) + sk_PrivkGuardedDivideEpsilon);
      }
    }
    return vec4<f32>((((_5_result + dst.xyz) - dsa) + src.xyz) - sda, (src.w + dst.w) - alpha);
  }
}
fn _skslMain(_stageOut: ptr<function, FSOut>) {
  {
    let _skTemp16 = blend_hslc_h4h2h4h4(vec2<f32>(1.0), _globalUniforms.src, _globalUniforms.dst);
    (*_stageOut).sk_FragColor = _skTemp16;
  }
}
@fragment fn main() -> FSOut {
  var _stageOut: FSOut;
  _skslMain(&_stageOut);
  return _stageOut;
}