Index: content/browser/gpu/gpu_surface_tracker.h |
diff --git a/content/browser/gpu/gpu_surface_tracker.h b/content/browser/gpu/gpu_surface_tracker.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..17fa13ab94faba864614e39ad16042529e719580 |
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+++ b/content/browser/gpu/gpu_surface_tracker.h |
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+// 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. |
+ |
+#ifndef CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_ |
+#define CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_ |
+ |
+#include <map> |
+ |
+#include "base/basictypes.h" |
+#include "base/memory/singleton.h" |
+#include "base/synchronization/lock.h" |
+#include "ui/gfx/native_widget_types.h" |
+ |
+// This class is responsible for managing rendering surfaces exposed to the |
+// GPU process. Every surface gets registered to this class, and gets an ID. |
+// All calls to and from the GPU process, with the exception of |
+// CreateViewCommandBuffer, refer to the rendering surface by its ID. |
+// This class is thread safe. |
+// |
+// Note: The ID can exist before the actual native handle for the surface is |
+// created, for example to allow giving a reference to it to a renderer, so that |
+// it is unamibiguously identified. |
+class GpuSurfaceTracker { |
+ public: |
+ // Gets the global instance of the surface tracker. |
+ static GpuSurfaceTracker* Get() { return GetInstance(); } |
+ |
+ // Adds a surface for a given RenderWidgetHost. |renderer_id| is the renderer |
+ // process ID, |render_widget_id| is the RenderWidgetHost route id within that |
+ // renderer. Returns the surface ID. |
+ int AddSurfaceForRenderer(int renderer_id, int render_widget_id); |
+ |
+ // Looks up a surface for a given RenderWidgetHost. Returns the surface |
+ // ID, or 0 if not found. |
+ // Note: This is an O(N) lookup. |
+ int LookupSurfaceForRenderer(int renderer_id, int render_widget_id); |
+ |
+ // Removes a given existing surface. |
+ void RemoveSurface(int surface_id); |
+ |
+ // Gets the renderer process ID and RenderWidgetHost route id for a given |
+ // surface, returning true if the surface is found (and corresponds to a |
+ // RenderWidgetHost), or false if not. |
+ bool GetRenderWidgetIDForSurface(int surface_id, |
+ int* renderer_id, |
+ int* render_widget_id); |
+ |
+ // Sets the native handle for the given surface. |
+ // Note: This is an O(log N) lookup. |
+ void SetSurfaceHandle(int surface_id, gfx::PluginWindowHandle handle); |
+ |
+ // Gets the native handle for the given surface. |
+ // Note: This is an O(log N) lookup. |
+ gfx::PluginWindowHandle GetSurfaceHandle(int surface_id); |
+ |
+ // Gets the global instance of the surface tracker. Identical to Get(), but |
+ // named that way for the implementation of Singleton. |
+ static GpuSurfaceTracker* GetInstance(); |
+ |
+ private: |
+ struct SurfaceInfo { |
+ int renderer_id; |
+ int render_widget_id; |
+ gfx::PluginWindowHandle handle; |
+ }; |
+ typedef std::map<int, SurfaceInfo> SurfaceMap; |
+ |
+ friend struct DefaultSingletonTraits<GpuSurfaceTracker>; |
+ |
+ GpuSurfaceTracker(); |
+ ~GpuSurfaceTracker(); |
+ |
+ base::Lock lock_; |
+ SurfaceMap surface_map_; |
+ int next_surface_id_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(GpuSurfaceTracker); |
+}; |
+ |
+#endif // CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_ |