Moved content/browser/gpu_* to content/browser/gpu/.

Also added an OWNERS file with myself and kbr.

TEST=build locally, try
BUG=none
Review URL: http://codereview.chromium.org/6931017

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@84661 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 157 insertions, 0 deletions

diff --git a/content/browser/gpu/gpu_process_host.h b/content/browser/gpu/gpu_process_host.h
new file mode 100644
index 0000000..17ba8fe
--- /dev/null
+++ b/content/browser/gpu/gpu_process_host.h
@@ -0,0 +1,157 @@
+// 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_BROWSER_GPU_GPU_PROCESS_HOST_H_
+#define CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_
+#pragma once
+
+#include <map>
+#include <queue>
+
+#include "base/callback.h"
+#include "base/memory/linked_ptr.h"
+#include "base/threading/non_thread_safe.h"
+#include "content/browser/browser_child_process_host.h"
+#include "content/common/gpu/gpu_info.h"
+#include "content/common/gpu/gpu_process_launch_causes.h"
+#include "ui/gfx/native_widget_types.h"
+
+struct GPUCreateCommandBufferConfig;
+
+namespace IPC {
+class Message;
+}
+
+class GpuProcessHost : public BrowserChildProcessHost,
+                       public base::NonThreadSafe {
+ public:
+  // Creates a new GpuProcessHost or gets one for a particular
+  // renderer process, resulting in the launching of a GPU process if required.
+  // Returns null on failure. It is not safe to store the pointer once control
+  // has returned to the message loop as it can be destroyed. Instead store the
+  // associated GPU host ID. A renderer ID of zero means the browser process.
+  // This could return NULL if GPU access is not allowed (blacklisted).
+  static GpuProcessHost* GetForRenderer(int renderer_id,
+                                        content::CauseForGpuLaunch cause);
+
+  // Helper function to send the given message to the GPU process on the IO
+  // thread.  Calls GetForRenderer and if a host is returned, sends it.
+  // Can be called from any thread.
+  static void SendOnIO(int renderer_id,
+                       content::CauseForGpuLaunch cause,
+                       IPC::Message* message);
+
+  // Get the GPU process host for the GPU process with the given ID. Returns
+  // null if the process no longer exists.
+  static GpuProcessHost* FromID(int host_id);
+  int host_id() const { return host_id_; }
+
+  virtual bool Send(IPC::Message* msg);
+
+  // ChildProcessHost implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message);
+  virtual void OnChannelConnected(int32 peer_pid);
+
+  typedef Callback3<const IPC::ChannelHandle&,
+                    base::ProcessHandle,
+                    const GPUInfo&>::Type
+    EstablishChannelCallback;
+
+  // Tells the GPU process to create a new channel for communication with a
+  // renderer. Once the GPU process responds asynchronously with the IPC handle
+  // and GPUInfo, we call the callback.
+  void EstablishGpuChannel(
+      int renderer_id, EstablishChannelCallback* callback);
+
+  typedef Callback0::Type SynchronizeCallback;
+
+  // Sends a reply message later when the next GpuHostMsg_SynchronizeReply comes
+  // in.
+  void Synchronize(SynchronizeCallback* callback);
+
+  typedef Callback1<int32>::Type CreateCommandBufferCallback;
+
+  // Tells the GPU process to create a new command buffer that draws into the
+  // window associated with the given renderer.
+  void CreateViewCommandBuffer(
+      gfx::PluginWindowHandle compositing_surface,
+      int32 render_view_id,
+      int32 renderer_id,
+      const GPUCreateCommandBufferConfig& init_params,
+      CreateCommandBufferCallback* callback);
+
+ private:
+  GpuProcessHost(int host_id);
+  virtual ~GpuProcessHost();
+
+  bool Init();
+
+  // Post an IPC message to the UI shim's message handler on the UI thread.
+  void RouteOnUIThread(const IPC::Message& message);
+
+  virtual bool CanShutdown();
+  virtual void OnProcessLaunched();
+  virtual void OnChildDied();
+  virtual void OnProcessCrashed(int exit_code);
+
+  // Message handlers.
+  void OnChannelEstablished(const IPC::ChannelHandle& channel_handle);
+  void OnSynchronizeReply();
+  void OnCommandBufferCreated(const int32 route_id);
+  void OnDestroyCommandBuffer(
+      gfx::PluginWindowHandle window, int32 renderer_id, int32 render_view_id);
+  void OnGraphicsInfoCollected(const GPUInfo& gpu_info);
+
+  bool LaunchGpuProcess();
+
+  void SendOutstandingReplies();
+  void EstablishChannelError(
+      EstablishChannelCallback* callback,
+      const IPC::ChannelHandle& channel_handle,
+      base::ProcessHandle renderer_process_for_gpu,
+      const GPUInfo& gpu_info);
+  void CreateCommandBufferError(CreateCommandBufferCallback* callback,
+                                int32 route_id);
+  void SynchronizeError(SynchronizeCallback* callback);
+
+  // The serial number of the GpuProcessHost / GpuProcessHostUIShim pair.
+  int host_id_;
+
+  // These are the channel requests that we have already sent to
+  // the GPU process, but haven't heard back about yet.
+  std::queue<linked_ptr<EstablishChannelCallback> > channel_requests_;
+
+  // The pending synchronization requests we need to reply to.
+  std::queue<linked_ptr<SynchronizeCallback> > synchronize_requests_;
+
+  // The pending create command buffer requests we need to reply to.
+  std::queue<linked_ptr<CreateCommandBufferCallback> >
+      create_command_buffer_requests_;
+
+#if defined(OS_LINUX)
+  typedef std::pair<int32 /* renderer_id */,
+                    int32 /* render_view_id */> ViewID;
+
+  // Encapsulates surfaces that we lock when creating view command buffers.
+  // We release this lock once the command buffer (or associated GPU process)
+  // is destroyed. This prevents the browser from destroying the surface
+  // while the GPU process is drawing to it.
+
+  // Multimap is used to simulate reference counting, see comment in
+  // GpuProcessHostUIShim::CreateViewCommandBuffer.
+  class SurfaceRef;
+  typedef std::multimap<ViewID, linked_ptr<SurfaceRef> > SurfaceRefMap;
+  SurfaceRefMap surface_refs_;
+#endif
+
+  // Qeueud messages to send when the process launches.
+  std::queue<IPC::Message*> queued_messages_;
+
+  // The handle for the GPU process or null if it is not known to be launched.
+  base::ProcessHandle gpu_process_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuProcessHost);
+};
+
+#endif  // CONTENT_BROWSER_GPU_GPU_PROCESS_HOST_H_