SkGaussianColorFilter.h

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/*

 * Copyright 2023 Google LLC

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

*/

#ifndef SkGaussianColorFilter_DEFINED

#define SkGaussianColorFilter_DEFINED

#include "include/core/SkFlattenable.h"

#include "include/core/SkTypes.h"

#include "src/effects/colorfilters/SkColorFilterBase.h"

class SkReadBuffer;

class SkWriteBuffer;

struct SkStageRec;

/**

 * Remaps the input color's alpha to a Gaussian ramp and then outputs premul white using the

 * remapped alpha.

*/

class SkGaussianColorFilter final : public SkColorFilterBase {

public:

    SkGaussianColorFilter();

    bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override;

    SkColorFilterBase::Type type() const override { return SkColorFilterBase::Type::kGaussian; }

protected:

    void flatten(SkWriteBuffer&) const override {}

private:

    SK_FLATTENABLE_HOOKS(SkGaussianColorFilter)

};

#endif