Calling OpenGL from the renderer process.

chrome/gpu/gpu_thread.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/gpu/gpu_thread.h"
 
 #include "build/build_config.h"
 #include "chrome/common/child_process.h"
 #include "chrome/common/gpu_messages.h"
-#include "chrome/gpu/gpu_channel.h"
 #include "chrome/gpu/gpu_config.h"
 
 #if defined(OS_WIN)
 #include "chrome/gpu/gpu_view_win.h"
 #elif defined(GPU_USE_GLX)
 #include "chrome/gpu/gpu_backing_store_glx_context.h"
 #include "chrome/gpu/gpu_view_x.h"
 
 #include <X11/Xutil.h>  // Must be last.
 #endif
@@ skipping 19 matching lines @@
   bool msg_is_ok = true;
   IPC_BEGIN_MESSAGE_MAP_EX(GpuThread, msg, msg_is_ok)
     IPC_MESSAGE_HANDLER(GpuMsg_EstablishChannel,
                         OnEstablishChannel)
     IPC_MESSAGE_HANDLER(GpuMsg_NewRenderWidgetHostView,
                         OnNewRenderWidgetHostView)
   IPC_END_MESSAGE_MAP_EX()
 }
 
 void GpuThread::OnEstablishChannel(int renderer_id) {
-  scoped_refptr<GpuChannel> channel =
-      GpuChannel::EstablishGpuChannel(renderer_id);
+  scoped_refptr<GpuChannel> channel;
+
+  GpuChannelMap::const_iterator iter = gpu_channels_.find(renderer_id);
+  if (iter == gpu_channels_.end()) {
+    channel = new GpuChannel(renderer_id);
+  } else {
+    channel = iter->second;
+  }
+
+  DCHECK(channel != NULL);
+
+  if (channel->Init()) {
+    // TODO(apatrick): figure out when to remove channels from the map. They
+    // will never be destroyed otherwise.
+    gpu_channels_[renderer_id] = channel;
+  } else {
+    channel = NULL;
+  }
+
   IPC::ChannelHandle channel_handle;
   if (channel.get()) {
-    channel_handle.name = channel->channel_name();
+    channel_handle.name = channel->GetChannelName();
 #if defined(OS_POSIX)
     // On POSIX, pass the renderer-side FD. Also mark it as auto-close so that
     // it gets closed after it has been sent.
     int renderer_fd = channel->DisownRendererFd();
     channel_handle.socket = base::FileDescriptor(renderer_fd, true);
 #endif
   }
 
   Send(new GpuHostMsg_ChannelEstablished(channel_handle));
 }
 
 void GpuThread::OnNewRenderWidgetHostView(GpuNativeWindowHandle parent_window,
                                           int32 routing_id) {
   // The GPUView class' lifetime is controlled by the host, which will send a
   // message to destroy the GpuRWHView when necessary. So we don't manage the
   // lifetime of this object.
 #if defined(OS_WIN)
   new GpuViewWin(this, parent_window, routing_id);
 #elif defined(GPU_USE_GLX)
   new GpuViewX(this, parent_window, routing_id);
 #else
   NOTIMPLEMENTED();
 #endif
 }