SkColorFilterShader.h

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/*
 * Copyright 2016 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
#ifndef SkColorFilterShader_DEFINED
#define SkColorFilterShader_DEFINED
 
#include "include/core/SkFlattenable.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkShader.h"
#include "src/effects/colorfilters/SkColorFilterBase.h"
#include "src/shaders/SkShaderBase.h"
 
class SkColorFilter;
class SkReadBuffer;
class SkWriteBuffer;
struct SkStageRec;
 
class SkColorFilterShader : public SkShaderBase {
public:
    SkColorFilterShader(sk_sp<SkShader> shader, float alpha, sk_sp<SkColorFilter> filter);
 
    ShaderType type() const override { return ShaderType::kColorFilter; }
 
    sk_sp<SkShader> shader() const { return fShader; }
    sk_sp<SkColorFilterBase> filter() const { return fFilter; }
    float alpha() const { return fAlpha; }
 
private:
    bool isOpaque() const override;
    void flatten(SkWriteBuffer&) const override;
    bool appendStages(const SkStageRec&, const SkShaders::MatrixRec&) const override;
 
    SK_FLATTENABLE_HOOKS(SkColorFilterShader)
 
    sk_sp<SkShader>          fShader;
    sk_sp<SkColorFilterBase> fFilter;
    float fAlpha;
};
 
#endif