Support browser side thumbnailing for GPU composited pages on Windows.

content/browser/renderer_host/render_widget_host_impl.cc

 // 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_impl.h"
 
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 14 matching lines @@
 #include "content/common/gpu/gpu_messages.h"
 #include "content/common/view_messages.h"
 #include "content/port/browser/render_widget_host_view_port.h"
 #include "content/public/browser/browser_accessibility_state.h"
 #include "content/public/browser/native_web_keyboard_event.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/user_metrics.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/result_codes.h"
+#include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebCompositionUnderline.h"
 #include "ui/base/keycodes/keyboard_codes.h"
 #include "webkit/glue/webcursor.h"
 #include "webkit/glue/webpreferences.h"
 #include "webkit/plugins/npapi/webplugin.h"
 
 #if defined(TOOLKIT_GTK)
 #include "content/browser/renderer_host/backing_store_gtk.h"
 #elif defined(OS_MACOSX)
 #include "content/browser/renderer_host/backing_store_mac.h"
@@ skipping 446 matching lines @@
   if (!view_)
     return;
   view_->SetIsLoading(is_loading);
 }
 
 bool RenderWidgetHostImpl::CopyFromBackingStore(skia::PlatformCanvas* output) {
   BackingStore* backing_store = GetBackingStore(false);
   if (!backing_store)
     return false;
 
+  TRACE_EVENT0("browser", "RenderWidgetHostImpl::CopyFromBackingStore");
   return backing_store->CopyFromBackingStore(
       gfx::Rect(backing_store->size()), output);
 }
 
+bool RenderWidgetHostImpl::CopyFromCompositingSurface(
+    const gfx::Size& size,
+    skia::PlatformCanvas* output) {
+  if (!is_accelerated_compositing_active_)
+    return false;
+
+  if (!view_)
+    return false;
+
+  TRACE_EVENT0("browser", "RenderWidgetHostImpl::CopyFromCompositingSurface");
+  return view_->CopyFromCompositingSurface(size, output);
+}
+
 #if defined(TOOLKIT_GTK)
 bool RenderWidgetHostImpl::CopyFromBackingStoreToGtkWindow(
     const gfx::Rect& dest_rect, GdkWindow* target) {
   BackingStore* backing_store = GetBackingStore(false);
   if (!backing_store)
     return false;
   (static_cast<BackingStoreGtk*>(backing_store))->PaintToRect(
       dest_rect, target);
   return true;
 }
@@ skipping 1154 matching lines @@
 
 // static
 void RenderWidgetHostImpl::AcknowledgePostSubBuffer(int32 route_id,
                                                     int gpu_host_id) {
   GpuProcessHostUIShim* ui_shim = GpuProcessHostUIShim::FromID(gpu_host_id);
   if (ui_shim)
     ui_shim->Send(new AcceleratedSurfaceMsg_PostSubBufferACK(route_id));
 }
 
 }  // namespace content