blob: f2bf79ec982b6fe234e52e5c430af21a17b2b8f5 [file] [log] [blame]
/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// Mixes the output of two FPs.
in fragmentProcessor fp0;
in fragmentProcessor? fp1;
in uniform half weight;
@class {
static OptimizationFlags OptFlags(const std::unique_ptr<GrFragmentProcessor>& fp0,
const std::unique_ptr<GrFragmentProcessor>& fp1) {
auto flags = ProcessorOptimizationFlags(fp0.get());
if (fp1) {
flags &= ProcessorOptimizationFlags(fp1.get());
}
return flags;
}
SkPMColor4f constantOutputForConstantInput(const SkPMColor4f& input) const override {
const auto c0 = ConstantOutputForConstantInput(this->childProcessor(0), input),
c1 = (this->numChildProcessors() > 1)
? ConstantOutputForConstantInput(this->childProcessor(1), input)
: input;
return {
c0.fR + (c1.fR - c0.fR) * weight,
c0.fG + (c1.fG - c0.fG) * weight,
c0.fB + (c1.fB - c0.fB) * weight,
c0.fA + (c1.fA - c0.fA) * weight
};
}
}
@optimizationFlags { OptFlags(fp0, fp1) }
void main() {
half4 in0 = sample(fp0, sk_InColor);
half4 in1 = (fp1 != null) ? sample(fp1, sk_InColor) : sk_InColor;
sk_OutColor = mix(in0, in1, weight);
}