SkMatrixColorFilter.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 SkMatrixColorFilter_DEFINED

#define SkMatrixColorFilter_DEFINED

#include "include/core/SkFlattenable.h"

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

#include <cstdint>

class SkReadBuffer;

class SkWriteBuffer;

struct SkStageRec;

class SkMatrixColorFilter final : public SkColorFilterBase {

public:

    enum class Domain : uint8_t { kRGBA, kHSLA };

    explicit SkMatrixColorFilter(const float array[20], Domain);

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

    bool onIsAlphaUnchanged() const override { return fAlphaIsUnchanged; }

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

    Domain domain() const { return fDomain; }

    const float* matrix() const { return fMatrix; }

private:

    friend void ::SkRegisterMatrixColorFilterFlattenable();

    SK_FLATTENABLE_HOOKS(SkMatrixColorFilter)

    void flatten(SkWriteBuffer&) const override;

    bool onAsAColorMatrix(float matrix[20]) const override;

    float fMatrix[20];

    bool fAlphaIsUnchanged;

    Domain fDomain;

};

#endif