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

content/common/gpu/gpu_channel.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_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 #pragma once
 
 #include <queue>
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/id_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/process.h"
 #include "build/build_config.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
 #include "content/common/message_router.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ui/gfx/gl/gl_share_group.h"
+#include "ui/gfx/gl/gpu_preference.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 
 class GpuChannelManager;
 struct GPUCreateCommandBufferConfig;
 class GpuWatchdog;
 class TransportTexture;
 
 namespace base {
 class MessageLoopProxy;
@@ skipping 77 matching lines @@
   // TransportTexture to delete and detach itself.
   void DestroyTransportTexture(int32 route_id);
 
   // Generate a route ID guaranteed to be unique for this channel.
   int GenerateRouteID();
 
   // Called to add/remove a listener for a particular message routing ID.
   void AddRoute(int32 route_id, IPC::Channel::Listener* listener);
   void RemoveRoute(int32 route_id);
 
+  // Indicates whether newly created contexts should prefer the
+  // discrete GPU even if they would otherwise use the integrated GPU.
+  bool ShouldPreferDiscreteGpu() const;
+
  private:
   void OnDestroy();
 
   bool OnControlMessageReceived(const IPC::Message& msg);
 
   void HandleMessage();
 
   // Message handlers.
   void OnInitialize(base::ProcessHandle renderer_process);
   void OnCreateOffscreenCommandBuffer(
       const gfx::Size& size,
       const GPUCreateCommandBufferConfig& init_params,
       IPC::Message* reply_message);
   void OnDestroyCommandBuffer(int32 route_id, IPC::Message* reply_message);
 
   void OnCreateTransportTexture(int32 context_route_id, int32 host_id);
 
   void OnEcho(const IPC::Message& message);
 
+  void OnWillGpuSwitchOccur(bool is_creating_context,
+                            gfx::GpuPreference gpu_preference,
+                            IPC::Message* reply_message);
+  void OnCloseChannel();
+
+  void WillCreateCommandBuffer(gfx::GpuPreference gpu_preference);
+  void DidDestroyCommandBuffer(gfx::GpuPreference gpu_preference);
+
   // The lifetime of objects of this class is managed by a GpuChannelManager.
   // The GpuChannelManager destroy all the GpuChannels that they own when they
   // are destroyed. So a raw pointer is safe.
   GpuChannelManager* gpu_channel_manager_;
 
   scoped_ptr<IPC::SyncChannel> channel_;
 
   std::deque<IPC::Message*> deferred_messages_;
 
   // The id of the renderer who is on the other side of the channel.
@@ skipping 19 matching lines @@
 
   // A collection of transport textures created.
   typedef IDMap<TransportTexture, IDMapOwnPointer> TransportTextureMap;
   TransportTextureMap transport_textures_;
 
   bool log_messages_;  // True if we should log sent and received messages.
   gpu::gles2::DisallowedFeatures disallowed_features_;
   GpuWatchdog* watchdog_;
   bool software_;
   bool handle_messages_scheduled_;
+  int32 num_contexts_preferring_discrete_gpu_;
 
   ScopedRunnableMethodFactory<GpuChannel> task_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_