Use WebKit compositor in ui::Layer

ui/gfx/compositor/compositor_cc.h

+// Copyright (c) 2011 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 UI_GFX_COMPOSITOR_COMPOSITOR_CC_H_
+#define UI_GFX_COMPOSITOR_COMPOSITOR_CC_H_
+#pragma once
+
+#include "base/compiler_specific.h"
+#include "ui/gfx/compositor/compositor.h"
+#include "ui/gfx/size.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebLayer.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebLayerClient.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebLayerTreeView.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebLayerTreeViewClient.h"
+
+namespace gfx {
+class Rect;
+}
+
+namespace ui {
+
+class COMPOSITOR_EXPORT TextureCC : public Texture {
+ public:
+  TextureCC();
+
+  // Texture implementation.
+  virtual void SetCanvas(const SkCanvas& canvas,
+                         const gfx::Point& origin,
+                         const gfx::Size& overall_size) OVERRIDE;
+
+  virtual void Draw(const ui::TextureDrawParams& params,
+                    const gfx::Rect& clip_bounds_in_texture) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TextureCC);
+};
+
+class COMPOSITOR_EXPORT CompositorCC : public Compositor,
+                                       public WebKit::WebLayerTreeViewClient,
+                                       public WebKit::WebLayerClient {
+ public:
+  CompositorCC(CompositorDelegate* delegate,
+               gfx::AcceleratedWidget widget,
+               const gfx::Size& size);
+  virtual ~CompositorCC();
+
+  static void InitializeThread();
+  static void TerminateThread();
+
+ protected:
+  // Compositor implementation.
+  virtual Texture* CreateTexture() OVERRIDE;
+  virtual void Blur(const gfx::Rect& bounds) OVERRIDE;
+  virtual void ScheduleDraw() OVERRIDE;
+  virtual void OnNotifyStart(bool clear) OVERRIDE;
+  virtual void OnNotifyEnd() OVERRIDE;
+  virtual void OnWidgetSizeChanged() OVERRIDE;
+  virtual void OnRootLayerChanged() OVERRIDE;
+  virtual void DrawTree() OVERRIDE;
+
+  // WebLayerTreeViewClient implementation.
+  virtual void animateAndLayout(double frameBeginTime) OVERRIDE;
+  virtual void applyScrollDelta(const WebKit::WebSize&) OVERRIDE;
+  virtual WebKit::WebGraphicsContext3D* createContext3D() OVERRIDE;
+  virtual void didRebindGraphicsContext(bool success) OVERRIDE;
+  virtual void scheduleComposite() OVERRIDE;
+
+  // WebLayerClient implementation.
+  virtual void notifyNeedsComposite() OVERRIDE;
+
+ private:
+  gfx::AcceleratedWidget widget_;
+  WebKit::WebLayer root_web_layer_;
+  WebKit::WebLayerTreeView host_;
+
+  DISALLOW_COPY_AND_ASSIGN(CompositorCC);
+};
+
+}  // namespace ui
+
+#endif  // UI_GFX_COMPOSITOR_COMPOSITOR_CC_H_