Added support for opening a GPU command buffer from a renderer processes through a GPU channel.

Probably only works in windows only so far.
TEST=none
BUG=none

Review URL: http://codereview.chromium.org/657046

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@40783 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 41 insertions, 0 deletions

diff --git a/chrome/renderer/render_widget.cc b/chrome/renderer/render_widget.cc
index 343db541..7d59256 100644
--- a/chrome/renderer/render_widget.cc
+++ b/chrome/renderer/render_widget.cc
@@ -147,6 +147,7 @@ IPC_DEFINE_MESSAGE_MAP(RenderWidget)
   IPC_MESSAGE_HANDLER(ViewMsg_ImeSetComposition, OnImeSetComposition)
   IPC_MESSAGE_HANDLER(ViewMsg_Repaint, OnMsgRepaint)
   IPC_MESSAGE_HANDLER(ViewMsg_SetTextDirection, OnSetTextDirection)
+  IPC_MESSAGE_HANDLER(ViewMsg_GpuChannelEstablished, OnGpuChannelEstablished)
   IPC_MESSAGE_HANDLER(ViewMsg_Move_ACK, OnRequestMoveAck)
   IPC_MESSAGE_UNHANDLED_ERROR()
 IPC_END_MESSAGE_MAP()
@@ -725,6 +726,17 @@ void RenderWidget::OnSetTextDirection(WebTextDirection direction) {
   webwidget_->setTextDirection(direction);
 }
 
+void RenderWidget::OnGpuChannelEstablished(
+    const IPC::ChannelHandle& channel_handle) {
+  if (channel_handle.name.size() != 0) {
+    // Connect to the GPU process if a channel name was received.
+    gpu_channel_->Connect(channel_handle.name);
+  } else {
+    // Otherwise cancel the connection.
+    gpu_channel_ = NULL;
+  }
+}
+
 void RenderWidget::SetHidden(bool hidden) {
   if (is_hidden_ == hidden)
     return;
@@ -867,3 +879,32 @@ void RenderWidget::CleanupWindowInPluginMoves(gfx::PluginWindowHandle window) {
     }
   }
 }
+
+void RenderWidget::EstablishGpuChannel() {
+  if (gpu_channel_.get()) {
+    // Do nothing if we are already establishing GPU channel.
+    if (gpu_channel_->state() == GpuChannelHost::UNCONNECTED)
+      return;
+
+    // Recreate the channel if it has been lost.
+    if (gpu_channel_->state() == GpuChannelHost::LOST)
+      gpu_channel_ = NULL;
+  }
+
+  if (!gpu_channel_.get())
+    gpu_channel_ = new GpuChannelHost;
+
+  // Ask the browser for the channel name.
+  CHECK(Send(new ViewHostMsg_EstablishGpuChannel(routing_id_)));
+}
+
+GpuChannelHost* RenderWidget::GetGpuChannel() {
+  if (!gpu_channel_.get())
+    return NULL;
+
+  if (gpu_channel_->state() != GpuChannelHost::CONNECTED)
+    return NULL;
+
+  return gpu_channel_.get();
+}
+