Support dynamic switching between integrated and discrete GPUs on Mac OS X.

content/renderer/gpu/gpu_channel_host.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 CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
 #define CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process_util.h"
 #include "base/synchronization/lock.h"
 #include "content/common/gpu/gpu_info.h"
 #include "content/common/message_router.h"
 #include "content/renderer/gpu/gpu_video_decode_accelerator_host.h"
 #include "ipc/ipc_channel_handle.h"
 #include "ipc/ipc_channel_proxy.h"
 #include "ipc/ipc_sync_channel.h"
+#include "ui/gfx/gl/gpu_preference.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 class CommandBufferProxy;
 class GpuSurfaceProxy;
 class GURL;
 class TransportTextureService;
 
 namespace base {
 class MessageLoopProxy;
@@ skipping 39 matching lines @@
 
   // IPC::Message::Sender implementation:
   virtual bool Send(IPC::Message* msg);
 
   // Create and connect to a command buffer in the GPU process.
   CommandBufferProxy* CreateViewCommandBuffer(
       int render_view_id,
       CommandBufferProxy* share_group,
       const std::string& allowed_extensions,
       const std::vector<int32>& attribs,
-      const GURL& active_url);
+      const GURL& active_url,
+      gfx::GpuPreference gpu_preference);
 
   // Create and connect to a command buffer in the GPU process.
   CommandBufferProxy* CreateOffscreenCommandBuffer(
       const gfx::Size& size,
       CommandBufferProxy* share_group,
       const std::string& allowed_extensions,
       const std::vector<int32>& attribs,
-      const GURL& active_url);
+      const GURL& active_url,
+      gfx::GpuPreference gpu_preference);
 
   // Creates a video decoder in the GPU process.
   // Returned pointer is owned by the CommandBufferProxy for |route_id|.
   GpuVideoDecodeAcceleratorHost* CreateVideoDecoder(
       int command_buffer_route_id,
       media::VideoDecodeAccelerator::Profile profile,
       media::VideoDecodeAccelerator::Client* client);
 
   // Destroy a command buffer created by this channel.
   void DestroyCommandBuffer(CommandBufferProxy* command_buffer);
 
   TransportTextureService* transport_texture_service() {
     return transport_texture_service_.get();
   }
 
   // Add a route for the current message loop.
   void AddRoute(int route_id, base::WeakPtr<IPC::Channel::Listener> listener);
   void RemoveRoute(int route_id);
 
+  // Asks the GPU process whether the creation or destruction of the
+  // given command buffer on the given GPU will provoke a switch of
+  // the GPU from integrated to discrete or vice versa. This requires
+  // all of the GL contexts in the same share group in the GPU process
+  // to be dropped.
+  bool WillGpuSwitchOccur(bool is_creating_context,
+                          gfx::GpuPreference gpu_preference);
+
+  // Forcibly close the channel on the GPU process side. This will
+  // cause all command buffers on this side to soon afterward start
+  // registering lost contexts. It also has the side effect of setting
+  // the state on this side to lost.
+  void ForciblyCloseChannel();
+
  private:
   // An shim class for working with listeners between threads.
   // It is used to post a task to the thread that owns the listener,
   // and where it's safe to dereference the weak pointer.
   class Listener :
     public base::RefCountedThreadSafe<Listener> {
    public:
     Listener(base::WeakPtr<IPC::Channel::Listener> listener,
                        scoped_refptr<base::MessageLoopProxy> loop);
     virtual ~Listener();
@@ skipping 51 matching lines @@
   // textures. These messages are routed to TransportTextureHost.
   scoped_refptr<TransportTextureService> transport_texture_service_;
 
   // A filter for sending messages from thread other than the main thread.
   scoped_refptr<IPC::SyncMessageFilter> sync_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannelHost);
 };
 
 #endif  // CONTENT_RENDERER_GPU_GPU_CHANNEL_HOST_H_