SkWorkingFormatColorFilter.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 SkWorkingFormatColorFilter_DEFINED
#define SkWorkingFormatColorFilter_DEFINED
 
#include "include/core/SkColorFilter.h"
#include "include/core/SkFlattenable.h"
#include "include/core/SkRefCnt.h"
#include "include/private/SkColorData.h"
#include "modules/skcms/skcms.h"
#include "src/effects/colorfilters/SkColorFilterBase.h"
 
class SkColorSpace;
class SkReadBuffer;
class SkWriteBuffer;
enum SkAlphaType : int;
struct SkStageRec;
 
class SkWorkingFormatColorFilter final : public SkColorFilterBase {
public:
    SkWorkingFormatColorFilter(sk_sp<SkColorFilter> child,
                               const skcms_TransferFunction* tf,
                               const skcms_Matrix3x3* gamut,
                               const SkAlphaType* at);
 
    sk_sp<SkColorSpace> workingFormat(const sk_sp<SkColorSpace>& dstCS, SkAlphaType* at) const;
 
    SkColorFilterBase::Type type() const override {
        return SkColorFilterBase::Type::kWorkingFormat;
    }
 
    bool appendStages(const SkStageRec& rec, bool shaderIsOpaque) const override;
 
    SkPMColor4f onFilterColor4f(const SkPMColor4f& origColor,
                                SkColorSpace* rawDstCS) const override;
 
    bool onIsAlphaUnchanged() const override;
 
    sk_sp<SkColorFilter> child() const { return fChild; }
 
private:
    friend void ::SkRegisterWorkingFormatColorFilterFlattenable();
    SK_FLATTENABLE_HOOKS(SkWorkingFormatColorFilter)
 
    void flatten(SkWriteBuffer& buffer) const override;
 
    sk_sp<SkColorFilter> fChild;
    skcms_TransferFunction fTF;
    bool fUseDstTF = true;
    skcms_Matrix3x3 fGamut;
    bool fUseDstGamut = true;
    SkAlphaType fAT;
    bool fUseDstAT = true;
};
 
#endif