third_party/WebKit/Source/platform/graphics/CompositorMutableState.h

// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CompositorMutableState_h
#define CompositorMutableState_h

#include "platform/PlatformExport.h"

class SkMatrix44;

namespace cc {
class LayerImpl;
} // namespace cc

namespace blink {

class CompositorMutation;

// This class wraps the compositor-owned, mutable state for a single element.
class PLATFORM_EXPORT CompositorMutableState {
public:
    CompositorMutableState(CompositorMutation*, cc::LayerImpl* main, cc::LayerImpl* scroll);
    ~CompositorMutableState();

    double opacity() const;
    void setOpacity(double);

    const SkMatrix44& transform() const;
    void setTransform(const SkMatrix44&);

    double scrollLeft() const;
    void setScrollLeft(double);

    double scrollTop() const;
    void setScrollTop(double);

private:
    CompositorMutation* m_mutation;
    cc::LayerImpl* m_mainLayer;
    cc::LayerImpl* m_scrollLayer;
};

} // namespace blink

#endif // CompositorMutableState_h