3D Compositing in <browser>, first draft.

content/browser/renderer_host/render_widget_host_view_base.h

 // Copyright (c) 2012 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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
 #pragma once
 
 #if defined(OS_MACOSX)
 #include <OpenGL/OpenGL.h>
@@ skipping 35 matching lines @@
 
   // RenderWidgetHostViewPort implementation.
   virtual void SelectionChanged(const string16& text,
                                 size_t offset,
                                 const ui::Range& range) OVERRIDE;
   virtual void SetBackground(const SkBitmap& background) OVERRIDE;
   virtual const SkBitmap& GetBackground() OVERRIDE;
   virtual bool IsShowingContextMenu() const OVERRIDE;
   virtual void SetShowingContextMenu(bool showing_menu) OVERRIDE;
   virtual bool IsMouseLocked() OVERRIDE;
+  virtual gfx::GLSurfaceHandle GetCompositingSurface() OVERRIDE;
+  virtual bool ResizeNeedsNewSurface() OVERRIDE;
   virtual void UnhandledWheelEvent(
       const WebKit::WebMouseWheelEvent& event) OVERRIDE;
   virtual void SetPopupType(WebKit::WebPopupType popup_type) OVERRIDE;
   virtual WebKit::WebPopupType GetPopupType() OVERRIDE;
   virtual BrowserAccessibilityManager*
       GetBrowserAccessibilityManager() const OVERRIDE;
 
+  virtual void AcceleratedSurfaceBuffersSwapped(
+      const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params_in_pixel,
+      int gpu_host_id) OVERRIDE;
+  virtual void AcceleratedSurfaceNew(
+      int32 width_in_pixel,
+      int32 height_in_pixel,
+      uint64* surface_handle,
+      TransportDIB::Handle* shm_handle) OVERRIDE;
+  virtual void AcceleratedSurfaceRelease(uint64 surface_handle) OVERRIDE;
+  virtual void AcceleratedSurfacePostSubBuffer(
+      const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params_in_pixel,
+      int gpu_host_id) OVERRIDE;
+
   void SetBrowserAccessibilityManager(BrowserAccessibilityManager* manager);
 
   // Notification that a resize or move session ended on the native widget.
   void UpdateScreenInfo();
 
+  // A small wrapper to represent a pluggable mechanism for generating a
+  // GLSurfaceHandle. Normally the platform-specific derived class will
+  // provide an implementation, but for the browser plugin, an alternate
+  // implementation is used.
+  class CompositingDelegate {
+   public:
+    virtual gfx::GLSurfaceHandle GetCompositingSurface() = 0;
+    virtual bool ResizeNeedsNewSurface() = 0;
+    virtual void AcceleratedSurfaceBuffersSwapped(
+        const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params_in_pixel,
+        int gpu_host_id) = 0;
+    virtual void AcceleratedSurfaceNew(
+        int32 width_in_pixel,
+        int32 height_in_pixel,
+        uint64* surface_handle,
+        TransportDIB::Handle* shm_handle);
+    virtual void AcceleratedSurfaceRelease(uint64 surface_handle);
+    virtual void AcceleratedSurfacePostSubBuffer(
+        const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params_in_pixel,
+        int gpu_host_id) = 0;
+    virtual ~CompositingDelegate();
+  };
+
+  void SetCompositingDelegate(scoped_ptr<CompositingDelegate> delegate) {
+   compositing_delegate_.reset(delegate.release());
+  }
+
  protected:
   // Interface class only, do not construct.
-  RenderWidgetHostViewBase();
+  RenderWidgetHostViewBase(scoped_ptr<CompositingDelegate> delegate);
 
   // Whether this view is a popup and what kind of popup it is (select,
   // autofill...).
   WebKit::WebPopupType popup_type_;
 
   // A custom background to paint behind the web content. This will be tiled
   // horizontally. Can be null, in which case we fall back to painting white.
   SkBitmap background_;
 
   // While the mouse is locked, the cursor is hidden from the user. Mouse events
   // are still generated. However, the position they report is the last known
   // mouse position just as mouse lock was entered; the movement they report
   // indicates what the change in position of the mouse would be had it not been
   // locked.
   bool mouse_locked_;
 
   // Whether we are showing a context menu.
   bool showing_context_menu_;
 
   // A buffer containing the text inside and around the current selection range.
   string16 selection_text_;
 
   // The offset of the text stored in |selection_text_| relative to the start of
   // the web page.
   size_t selection_text_offset_;
 
   // The current selection range relative to the start of the web page.
   ui::Range selection_range_;
 
+
  private:
   // Manager of the tree representation of the WebKit render tree.
   scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
 
   gfx::Rect current_display_area_;
   float current_device_scale_factor_;
 
+  scoped_ptr<CompositingDelegate> compositing_delegate_;
+
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_