Initial port of accelerated compositor to Mac OS X 10.6. Reused...

chrome/browser/renderer_host/accelerated_surface_container_manager_mac.h

 // Copyright (c) 2010 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 CHROME_BROWSER_RENDERER_HOST_GPU_PLUGIN_CONTAINER_MANAGER_MAC_H_
 #define CHROME_BROWSER_RENDERER_HOST_GPU_PLUGIN_CONTAINER_MANAGER_MAC_H_
 #pragma once
 
 #include <OpenGL/OpenGL.h>
 #include <map>
@@ skipping 10 matching lines @@
 class AcceleratedSurfaceContainerMac;
 
 // Helper class that manages the backing store and on-screen rendering
 // of instances of the GPU plugin on the Mac.
 class AcceleratedSurfaceContainerManagerMac {
  public:
   AcceleratedSurfaceContainerManagerMac();
 
   // Allocates a new "fake" PluginWindowHandle, which is used as the
   // key for the other operations.
-  gfx::PluginWindowHandle AllocateFakePluginWindowHandle(bool opaque);
+  gfx::PluginWindowHandle AllocateFakePluginWindowHandle(bool opaque,
+                                                         bool root);
 
   // Destroys a fake PluginWindowHandle and associated storage.
   void DestroyFakePluginWindowHandle(gfx::PluginWindowHandle id);
 
+  // Indicates whether a "root" PluginWindowHandle has been allocated,
+  // which means that we are using accelerated compositing and should
+  // short-circuit the normal drawing process.
+  bool HasRootContainer();
+
   // Sets the size and backing store of the plugin instance.  There are two
   // versions: the IOSurface version is used on systems where the IOSurface
   // API is supported (Mac OS X 10.6 and later); the TransportDIB is used on
   // Mac OS X 10.5 and earlier.
   void SetSizeAndIOSurface(gfx::PluginWindowHandle id,
                            int32 width,
                            int32 height,
                            uint64 io_surface_identifier);
   void SetSizeAndTransportDIB(gfx::PluginWindowHandle id,
                               int32 width,
                               int32 height,
                               TransportDIB::Handle transport_dib);
 
   // Takes an update from WebKit about a plugin's position and size and moves
   // the plugin accordingly.
   void MovePluginContainer(const webkit_glue::WebPluginGeometry& move);
 
   // Draws all of the managed plugin containers into the given OpenGL
   // context, which must already be current.
-  void Draw(CGLContextObj context);
+  void Draw(CGLContextObj context,
+            bool draw_root_container);
 
   // Causes the next Draw call on each container to trigger a texture upload.
   // Should be called any time the drawing context has changed.
   void ForceTextureReload();
 
   // Called by the container to enqueue its OpenGL texture objects for
   // deletion.
   void EnqueueTextureForDeletion(GLuint texture);
 
  private:
   uint32 current_id_;
 
   // Maps a "fake" plugin window handle to the corresponding container.
   AcceleratedSurfaceContainerMac* MapIDToContainer(gfx::PluginWindowHandle id);
 
   // A map that associates plugin window handles with their containers.
   typedef std::map<gfx::PluginWindowHandle, AcceleratedSurfaceContainerMac*>
       PluginWindowToContainerMap;
   PluginWindowToContainerMap plugin_window_to_container_map_;
 
+  // The "root" container, which is only used to draw the output of
+  // the accelerated compositor if it is active. Currently,
+  // accelerated plugins (Core Animation and Pepper 3D) are drawn on
+  // top of the page's contents rather than transformed and composited
+  // with the rest of the page. At some point we would like them to be
+  // treated uniformly with other page elements; when this is done,
+  // the separate treatment of the root container can go away because
+  // there will only be one container active when the accelerated
+  // compositor is active.
+  AcceleratedSurfaceContainerMac* root_container_;
+
   // A list of OpenGL textures waiting to be deleted
   std::vector<GLuint> textures_pending_deletion_;
 
   DISALLOW_COPY_AND_ASSIGN(AcceleratedSurfaceContainerManagerMac);
 };
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_GPU_PLUGIN_CONTAINER_MANAGER_MAC_H_