Provide shared context to Platform API in renderer.

content/renderer/render_thread_impl.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_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/observer_list.h"
 #include "base/string16.h"
 #include "base/timer.h"
 #include "build/build_config.h"
 #include "content/common/child_process.h"
 #include "content/common/child_thread.h"
 #include "content/common/content_export.h"
 #include "content/common/gpu/client/gpu_channel_host.h"
+#include "content/common/gpu/client/offscreen_context.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "content/public/renderer/render_thread.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ui/gfx/native_widget_types.h"
 
 class SkBitmap;
 struct ViewMsg_New_Params;
 
 namespace WebKit {
 class WebMediaStreamCenter;
@@ skipping 47 matching lines @@
 
 // The RenderThreadImpl class represents a background thread where RenderView
 // instances live.  The RenderThread supports an API that is used by its
 // consumer to talk indirectly to the RenderViews and supporting objects.
 // Likewise, it provides an API for the RenderViews to talk back to the main
 // process (i.e., their corresponding WebContentsImpl).
 //
 // Most of the communication occurs in the form of IPC messages.  They are
 // routed to the RenderThread according to the routing IDs of the messages.
 // The routing IDs correspond to RenderView instances.
-class CONTENT_EXPORT RenderThreadImpl : public RenderThread,
-                                        public ChildThread,
-                                        public GpuChannelHostFactory {
+class CONTENT_EXPORT RenderThreadImpl
+    : public RenderThread,
+      public ChildThread,
+      public GpuChannelHostFactory,
+      public OffscreenContextClient {
  public:
   static RenderThreadImpl* current();
 
   RenderThreadImpl();
   // Constructor that's used when running in single process mode.
   explicit RenderThreadImpl(const std::string& channel_name);
   virtual ~RenderThreadImpl();
 
   // When initializing WebKit, ensure that any schemes needed for the content
   // module are registered properly.  Static to allow sharing with tests.
@@ skipping 91 matching lines @@
   }
 
   AudioInputMessageFilter* audio_input_message_filter() {
     return audio_input_message_filter_.get();
   }
 
   AudioMessageFilter* audio_message_filter() {
     return audio_message_filter_.get();
   }
 
-
+  WebKit::WebGraphicsContext3D* OffscreenContext3dForMainThread();
+  WebKit::WebGraphicsContext3D* OffscreenContext3dForCompositorThread();
+  GrContext* OffscreenGrContextForMainThread();
+  GrContext* OffscreenGrContextForCompositorThread();
 
   // Creates the embedder implementation of WebMediaStreamCenter.
   // The resulting object is owned by WebKit and deleted by WebKit at tear-down.
   WebKit::WebMediaStreamCenter* CreateMediaStreamCenter(
       WebKit::WebMediaStreamCenterClient* client);
 
   // Returns a factory used for creating RTC PeerConnection objects.
   MediaStreamDependencyFactory* GetMediaStreamDependencyFactory();
 
   PeerConnectionTracker* peer_connection_tracker() {
@@ skipping 104 matching lines @@
   void OnSetZoomLevelForCurrentURL(const std::string& host, double zoom_level);
   void OnCreateNewView(const ViewMsg_New_Params& params);
   void OnTransferBitmap(const SkBitmap& bitmap, int resource_id);
   void OnPurgePluginListCache(bool reload_pages);
   void OnNetworkStateChanged(bool online);
   void OnGetAccessibilityTree();
   void OnTempCrashWithData(const GURL& data);
 
   void IdleHandlerInForegroundTab();
 
+  // OffscreenContextClient implementation.
+  virtual WebKit::WebGraphicsContext3D* CreateOffscreenContext()
+      OVERRIDE;
+  virtual void DidLoseContext(OffscreenContext* offscreen_context)
+      OVERRIDE {}
+  virtual void DidCreateContext(OffscreenContext* offscreen_context,
+                                bool success) OVERRIDE {}
+
   // These objects live solely on the render thread.
   scoped_ptr<AppCacheDispatcher> appcache_dispatcher_;
   scoped_ptr<DomStorageDispatcher> dom_storage_dispatcher_;
   scoped_ptr<IndexedDBDispatcher> main_thread_indexed_db_dispatcher_;
   scoped_ptr<RendererWebKitPlatformSupportImpl> webkit_platform_support_;
 
   // Used on the render thread and deleted by WebKit at shutdown.
   MediaStreamCenter* media_stream_center_;
 
   // Used on the renderer and IPC threads.
@@ skipping 43 matching lines @@
   // The channel from the renderer process to the GPU process.
   scoped_refptr<GpuChannelHost> gpu_channel_;
 
   // A lazily initiated thread on which file operations are run.
   scoped_ptr<base::Thread> file_thread_;
 
   bool compositor_initialized_;
   scoped_ptr<CompositorThread> compositor_thread_;
   scoped_refptr<IPC::ForwardingMessageFilter> compositor_output_surface_filter_;
 
+  OffscreenContext shared_context_main_thread_;
+  OffscreenContext shared_context_compositor_thread_;
+
   ObserverList<RenderProcessObserver> observers_;
 
   class GpuVDAContextLostCallback;
   scoped_ptr<GpuVDAContextLostCallback> context_lost_cb_;
   scoped_ptr<WebGraphicsContext3DCommandBufferImpl> gpu_vda_context3d_;
 
   scoped_ptr<AudioRendererMixerManager> audio_renderer_mixer_manager_;
   scoped_ptr<media::AudioHardwareConfig> audio_hardware_config_;
 
   HistogramCustomizer histogram_customizer_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_