CARemoteLayer alive-ish

content/browser/renderer_host/render_widget_host_view_mac.mm

 // 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.
 
 #include "content/browser/renderer_host/render_widget_host_view_mac.h"
 
 #import <objc/runtime.h>
 #include <QuartzCore/QuartzCore.h>
 
 #include "base/basictypes.h"
@@ skipping 432 matching lines @@
   *results = GetWebScreenInfo(NULL);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewMac, public:
 
 RenderWidgetHostViewMac::RenderWidgetHostViewMac(RenderWidgetHost* widget)
     : render_widget_host_(RenderWidgetHostImpl::From(widget)),
       text_input_type_(ui::TEXT_INPUT_TYPE_NONE),
       can_compose_inline_(true),
+      remote_context_id_(0),
       pending_latency_info_delay_(0),
       pending_latency_info_delay_weak_ptr_factory_(this),
       backing_store_scale_factor_(1),
       is_loading_(false),
       weak_factory_(this),
       fullscreen_parent_host_view_(NULL),
       overlay_view_weak_factory_(this),
       software_frame_weak_ptr_factory_(this) {
   software_frame_manager_.reset(new SoftwareFrameManager(
       software_frame_weak_ptr_factory_.GetWeakPtr()));
@@ skipping 1195 matching lines @@
     const GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params& params,
     int gpu_host_id) {
   TRACE_EVENT0("browser",
       "RenderWidgetHostViewMac::AcceleratedSurfaceBuffersSwapped");
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   AddPendingSwapAck(params.route_id,
                     gpu_host_id,
                     compositing_iosurface_ ?
                         compositing_iosurface_->GetRendererID() : 0);
+
+
+  if (params.ca_context_id) {
+    if (params.ca_context_id != remote_context_id_) {
+      remote_context_id_ = params.ca_context_id;
+      CALayerHost* layer_host = [[CALayerHost alloc] init];
+      CHECK(layer_host);
+      [layer_host setContextId:remote_context_id_];
+      [background_layer_ addSublayer:layer_host];
+    }
+    SendPendingSwapAck();
+    return;
+  }
+
   CompositorSwapBuffers(params.surface_handle,
                         params.size,
                         params.scale_factor,
                         params.latency_info);
 }
 
 void RenderWidgetHostViewMac::AcceleratedSurfacePostSubBuffer(
     const GpuHostMsg_AcceleratedSurfacePostSubBuffer_Params& params,
     int gpu_host_id) {
   TRACE_EVENT0("browser",
@@ skipping 2246 matching lines @@
 
 // "-webkit-app-region: drag | no-drag" is implemented on Mac by excluding
 // regions that are not draggable. (See ControlRegionView in
 // native_app_window_cocoa.mm). This requires the render host view to be
 // draggable by default.
 - (BOOL)mouseDownCanMoveWindow {
   return YES;
 }
 
 @end