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