Index: content/browser/renderer_host/offscreen_canvas_surface_manager.cc |
diff --git a/content/browser/renderer_host/offscreen_canvas_surface_manager.cc b/content/browser/renderer_host/offscreen_canvas_surface_manager.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..68fa8bb76ee055893f2b64cf035d27f9e96a34f2 |
--- /dev/null |
+++ b/content/browser/renderer_host/offscreen_canvas_surface_manager.cc |
@@ -0,0 +1,48 @@ |
+// Copyright 2016 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 "base/lazy_instance.h" |
+#include "content/browser/renderer_host/offscreen_canvas_surface_manager.h" |
+ |
+namespace content { |
+ |
+namespace { |
+base::LazyInstance<OffscreenCanvasSurfaceManager> g_manager = |
dcheng
2016/11/15 07:28:29
Nit: let's make this a Leaky LazyInstance unless w
xlai (Olivia)
2016/11/15 17:16:18
Done.
|
+ LAZY_INSTANCE_INITIALIZER; |
+} |
+ |
+OffscreenCanvasSurfaceManager::OffscreenCanvasSurfaceManager() {} |
+ |
+OffscreenCanvasSurfaceManager::~OffscreenCanvasSurfaceManager() { |
+ registered_surface_instances_.clear(); |
+} |
+ |
+OffscreenCanvasSurfaceManager* OffscreenCanvasSurfaceManager::GetInstance() { |
+ return g_manager.Pointer(); |
+} |
+ |
+void OffscreenCanvasSurfaceManager::RegisterOffscreenCanvasSurfaceInstance( |
+ cc::FrameSinkId frame_sink_id, |
+ OffscreenCanvasSurfaceImpl* surface_instance) { |
+ DCHECK(surface_instance); |
+ DCHECK_EQ(registered_surface_instances_.count(frame_sink_id), 0u); |
+ registered_surface_instances_[frame_sink_id] = surface_instance->GetWeakPtr(); |
+} |
+ |
+void OffscreenCanvasSurfaceManager::UnregisterOffscreenCanvasSurfaceInstance( |
+ cc::FrameSinkId frame_sink_id) { |
+ DCHECK_EQ(registered_surface_instances_.count(frame_sink_id), 1u); |
+ registered_surface_instances_.erase(frame_sink_id); |
+} |
+ |
+OffscreenCanvasSurfaceImpl* OffscreenCanvasSurfaceManager::GetSurfaceInstance( |
+ cc::FrameSinkId frame_sink_id) { |
+ auto search = registered_surface_instances_.find(frame_sink_id); |
+ if (search != registered_surface_instances_.end()) { |
+ return search->second.get(); |
+ } |
+ return nullptr; |
+} |
+ |
+} // namespace content |