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// Copyright 2019 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 CC_LAYERS_MIRROR_LAYER_H_
#define CC_LAYERS_MIRROR_LAYER_H_
#include "base/memory/scoped_refptr.h"
#include "cc/cc_export.h"
#include "cc/layers/layer.h"
namespace cc {
// A layer that can mirror contents of another Layer.
class CC_EXPORT MirrorLayer : public Layer {
public:
static scoped_refptr<MirrorLayer> Create(scoped_refptr<Layer> mirrored_layer);
MirrorLayer(const MirrorLayer&) = delete;
MirrorLayer& operator=(const MirrorLayer&) = delete;
Layer* mirrored_layer() const { return mirrored_layer_.get(); }
// Layer overrides.
std::unique_ptr<LayerImpl> CreateLayerImpl(LayerTreeImpl* tree_impl) override;
void PushPropertiesTo(LayerImpl* layer) override;
void SetLayerTreeHost(LayerTreeHost* host) override;
protected:
explicit MirrorLayer(scoped_refptr<Layer> mirrored_layer);
private:
~MirrorLayer() override;
// A reference to a layer that is mirrored by this layer. |mirrored_layer_|
// cannot be an ancestor of |this|.
scoped_refptr<Layer> mirrored_layer_;
};
} // namespace cc
#endif // CC_LAYERS_MIRROR_LAYER_H_
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