Add optimization for CHROMIUM_subscribe_uniform extension.

content/common/gpu/gpu_channel.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_COMMON_GPU_GPU_CHANNEL_H_
 #define CONTENT_COMMON_GPU_GPU_CHANNEL_H_
 
 #include <deque>
 #include <string>
 
 #include "base/id_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
 #include "build/build_config.h"
 #include "content/common/gpu/gpu_command_buffer_stub.h"
 #include "content/common/gpu/gpu_memory_manager.h"
 #include "content/common/gpu/gpu_result_codes.h"
 #include "content/common/message_router.h"
+#include "gpu/command_buffer/service/valuebuffer_manager.h"
 #include "ipc/ipc_sync_channel.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/gfx/size.h"
 #include "ui/gl/gl_share_group.h"
 #include "ui/gl/gpu_preference.h"
 
 struct GPUCreateCommandBufferConfig;
 
 namespace base {
 class MessageLoopProxy;
 class WaitableEvent;
 }
 
 namespace gpu {
 class PreemptionFlag;
 union ValueState;
 class ValueStateMap;
 namespace gles2 {
+class SubscriptionRefSet;
 }
 }
 
 namespace IPC {
 class MessageFilter;
 }
 
 namespace content {
 class DevToolsGpuAgent;
 class GpuChannelManager;
 class GpuChannelMessageFilter;
 class GpuWatchdog;
 
 // Encapsulates an IPC channel between the GPU process and one renderer
 // process. On the renderer side there's a corresponding GpuChannelHost.
-class GpuChannel : public IPC::Listener, public IPC::Sender {
+class GpuChannel : public IPC::Listener, public IPC::Sender,
+                   public gpu::gles2::SubscriptionRefSet::Observer {
  public:
   // Takes ownership of the renderer process handle.
   GpuChannel(GpuChannelManager* gpu_channel_manager,
              GpuWatchdog* watchdog,
              gfx::GLShareGroup* share_group,
              gpu::gles2::MailboxManager* mailbox_manager,
              int client_id,
              bool software,
              bool allow_future_sync_points);
   ~GpuChannel() override;
@@ skipping 26 matching lines @@
   void OnChannelError() override;
 
   // IPC::Sender implementation:
   bool Send(IPC::Message* msg) override;
 
   // Requeue the message that is currently being processed to the beginning of
   // the queue. Used when the processing of a message gets aborted because of
   // unscheduling conditions.
   void RequeueMessage();
 
+  // SubscriptionRefSet::Observer implementation
+  void OnAddSubscription(unsigned int target) override;
+  void OnRemoveSubscription(unsigned int target) override;
+
   // This is called when a command buffer transitions from the unscheduled
   // state to the scheduled state, which potentially means the channel
   // transitions from the unscheduled to the scheduled state. When this occurs
   // deferred IPC messaged are handled.
   void OnScheduled();
 
   // This is called when a command buffer transitions between scheduled and
   // descheduled states. When any stub is descheduled, we stop preempting
   // other channels.
   void StubSchedulingChanged(bool scheduled);
@@ skipping 100 matching lines @@
 
   // Used to implement message routing functionality to CommandBuffer objects
   MessageRouter router_;
 
   // The share group that all contexts associated with a particular renderer
   // process use.
   scoped_refptr<gfx::GLShareGroup> share_group_;
 
   scoped_refptr<gpu::gles2::MailboxManager> mailbox_manager_;
 
+  scoped_refptr<gpu::gles2::SubscriptionRefSet> subscription_ref_set_;
+
   scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state_;
 
   typedef IDMap<GpuCommandBufferStub, IDMapOwnPointer> StubMap;
   StubMap stubs_;
 
   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_;
@@ skipping 11 matching lines @@
   // that any WeakPtrs to Controller are invalidated before its members
   // variable's destructors are executed, rendering them invalid.
   base::WeakPtrFactory<GpuChannel> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuChannel);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_GPU_CHANNEL_H_