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// Copyright 2015 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 PaintArtifactCompositor_h
#define PaintArtifactCompositor_h
#include "base/memory/ref_counted.h"
#include "platform/PlatformExport.h"
#include "wtf/Noncopyable.h"
#include "wtf/OwnPtr.h"
#include "wtf/Vector.h"
namespace cc {
class Layer;
}
namespace blink {
class PaintArtifact;
class WebLayer;
// Responsible for managing compositing in terms of a PaintArtifact.
//
// Owns a subtree of the compositor layer tree, and updates it in response to
// changes in the paint artifact.
//
// PaintArtifactCompositor is the successor to PaintLayerCompositor, reflecting
// the new home of compositing decisions after paint in Slimming Paint v2.
class PLATFORM_EXPORT PaintArtifactCompositor {
WTF_MAKE_NONCOPYABLE(PaintArtifactCompositor);
public:
PaintArtifactCompositor();
~PaintArtifactCompositor();
// Updates the layer tree to match the provided paint artifact.
// Creates the root layer if not already done.
void update(const PaintArtifact&);
// The root layer of the tree managed by this object.
cc::Layer* rootLayer() const { return m_rootLayer.get(); }
// Wraps rootLayer(), so that it can be attached as a child of another
// WebLayer.
WebLayer* webLayer() const { return m_webLayer.get(); }
private:
class ContentLayerClientImpl;
scoped_refptr<cc::Layer> m_rootLayer;
OwnPtr<WebLayer> m_webLayer;
Vector<OwnPtr<ContentLayerClientImpl>> m_contentLayerClients;
// For ~PaintArtifactCompositor on MSVC.
friend struct WTF::OwnedPtrDeleter<ContentLayerClientImpl>;
};
} // namespace blink
#endif // PaintArtifactCompositor_h
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