[Android WebView] Migrate the rendering code to a separate set of classes.

android_webview/browser/browser_view_renderer_impl.h

+// Copyright (c) 2013 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 ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_IMPL_H_
+#define ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_IMPL_H_
+
+#include "android_webview/browser/browser_view_renderer.h"
+#include "android_webview/browser/renderer_host/view_renderer_host.h"
+#include "content/public/browser/android/compositor.h"
+#include "content/public/browser/web_contents_observer.h"
+#include "skia/ext/refptr.h"
+#include "ui/gfx/point.h"
+#include "ui/gfx/size.h"
+
+typedef void* EGLContext;
+struct AwDrawSWFunctionTable;
+struct AwDrawGLInfo;
+class SkCanvas;
+class SkPicture;
+
+namespace content {
+class WebContents;
+}
+
+namespace android_webview {
+
+class BrowserViewRendererImpl
+    : public BrowserViewRenderer,
+      public ViewRendererHost::Client,
+      public content::Compositor::Client {
+ public:
+  static BrowserViewRendererImpl* Create(BrowserViewRenderer::Client* client,
+                                         JavaHelper* java_helper);
+  virtual ~BrowserViewRendererImpl();
+
+  // Platform methods.
+  static void SetAwDrawSWFunctionTable(AwDrawSWFunctionTable* table);
+
+  // BrowserViewRenderer implementation.
+  virtual void SetContents(
+      content::ContentViewCore* content_view_core) OVERRIDE;
+  virtual void DrawGL(AwDrawGLInfo* draw_info) OVERRIDE;
+  virtual void SetScrollForHWFrame(int x, int y) OVERRIDE;
+  virtual bool DrawSW(jobject java_canvas, const gfx::Rect& clip) OVERRIDE;
+  virtual base::android::ScopedJavaLocalRef<jobject> CapturePicture() OVERRIDE;
+  virtual void EnableOnNewPicture(OnNewPictureMode mode) OVERRIDE;
+  virtual void OnVisibilityChanged(
+      bool view_visible, bool window_visible) OVERRIDE;
+  virtual void OnSizeChanged(int width, int height) OVERRIDE;
+  virtual void OnAttachedToWindow(int width, int height) OVERRIDE;
+  virtual void OnDetachedFromWindow() OVERRIDE;
+
+  // content::Compositor::Client implementation.
+  virtual void ScheduleComposite() OVERRIDE;
+
+  // ViewRendererHost::Client implementation.
+  virtual void OnPictureUpdated(int process_id, int render_view_id) OVERRIDE;
+
+ protected:
+  BrowserViewRendererImpl(BrowserViewRenderer::Client* client,
+                          JavaHelper* java_helper);
+
+ private:
+  // Returns the latest locally available picture if any.
+  // If none is available will synchronously request the latest one
+  // and block until the result is received.
+  skia::RefPtr<SkPicture> GetLastCapturedPicture();
+  void OnPictureUpdated();
+
+  void SetCompositorVisibility(bool visible);
+  void ResetCompositor();
+  void Invalidate();
+  bool RenderSW(SkCanvas* canvas);
+  bool RenderPicture(SkCanvas* canvas);
+
+  BrowserViewRenderer::Client* client_;
+  BrowserViewRenderer::JavaHelper* java_helper_;
+
+  scoped_ptr<ViewRendererHost> view_renderer_host_;
+  scoped_ptr<content::Compositor> compositor_;
+
+  // Ensures content keeps clipped within the view during transformations.
+  scoped_refptr<cc::Layer> view_clip_layer_;
+
+  // Applies the transformation matrix.
+  scoped_refptr<cc::Layer> transform_layer_;
+
+  // Ensures content is drawn within the scissor clip rect provided by the
+  // Android framework.
+  scoped_refptr<cc::Layer> scissor_clip_layer_;
+
+  // Last View scroll before hardware rendering is triggered.
+  gfx::Point hw_rendering_scroll_;
+
+  bool view_visible_;
+  bool compositor_visible_;
+  bool is_composite_pending_;
+  float dpi_scale_;
+  gfx::Size view_size_;
+  OnNewPictureMode on_new_picture_mode_;
+
+  // Used only for detecting Android View System context changes.
+  // Not to be used between draw calls.
+  EGLContext last_frame_context_;
+
+  // Set via SetContents. Used to recognize updates to the local WebView.
+  content::WebContents* web_contents_;
+
+  DISALLOW_COPY_AND_ASSIGN(BrowserViewRendererImpl);
+};
+
+}  // namespace android_webview
+
+#endif  // ANDROID_WEBVIEW_BROWSER_BROWSER_VIEW_RENDERER_IMPL_H_