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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_ |
| 6 #define CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_ |
| 7 |
| 8 #include <map> |
| 9 |
| 10 #include "base/basictypes.h" |
| 11 #include "base/memory/singleton.h" |
| 12 #include "base/synchronization/lock.h" |
| 13 #include "ui/gfx/native_widget_types.h" |
| 14 |
| 15 // This class is responsible for managing rendering surfaces exposed to the |
| 16 // GPU process. Every surface gets registered to this class, and gets an ID. |
| 17 // All calls to and from the GPU process, with the exception of |
| 18 // CreateViewCommandBuffer, refer to the rendering surface by its ID. |
| 19 // This class is thread safe. |
| 20 // |
| 21 // Note: The ID can exist before the actual native handle for the surface is |
| 22 // created, for example to allow giving a reference to it to a renderer, so that |
| 23 // it is unamibiguously identified. |
| 24 class GpuSurfaceTracker { |
| 25 public: |
| 26 // Gets the global instance of the surface tracker. |
| 27 static GpuSurfaceTracker* Get() { return GetInstance(); } |
| 28 |
| 29 // Adds a surface for a given RenderWidgetHost. |renderer_id| is the renderer |
| 30 // process ID, |render_widget_id| is the RenderWidgetHost route id within that |
| 31 // renderer. Returns the surface ID. |
| 32 int AddSurfaceForRenderer(int renderer_id, int render_widget_id); |
| 33 |
| 34 // Looks up a surface for a given RenderWidgetHost. Returns the surface |
| 35 // ID, or 0 if not found. |
| 36 // Note: This is an O(N) lookup. |
| 37 int LookupSurfaceForRenderer(int renderer_id, int render_widget_id); |
| 38 |
| 39 // Removes a given existing surface. |
| 40 void RemoveSurface(int surface_id); |
| 41 |
| 42 // Gets the renderer process ID and RenderWidgetHost route id for a given |
| 43 // surface, returning true if the surface is found (and corresponds to a |
| 44 // RenderWidgetHost), or false if not. |
| 45 bool GetRenderWidgetIDForSurface(int surface_id, |
| 46 int* renderer_id, |
| 47 int* render_widget_id); |
| 48 |
| 49 // Sets the native handle for the given surface. |
| 50 // Note: This is an O(log N) lookup. |
| 51 void SetSurfaceHandle(int surface_id, gfx::PluginWindowHandle handle); |
| 52 |
| 53 // Gets the native handle for the given surface. |
| 54 // Note: This is an O(log N) lookup. |
| 55 gfx::PluginWindowHandle GetSurfaceHandle(int surface_id); |
| 56 |
| 57 // Gets the global instance of the surface tracker. Identical to Get(), but |
| 58 // named that way for the implementation of Singleton. |
| 59 static GpuSurfaceTracker* GetInstance(); |
| 60 |
| 61 private: |
| 62 struct SurfaceInfo { |
| 63 int renderer_id; |
| 64 int render_widget_id; |
| 65 gfx::PluginWindowHandle handle; |
| 66 }; |
| 67 typedef std::map<int, SurfaceInfo> SurfaceMap; |
| 68 |
| 69 friend struct DefaultSingletonTraits<GpuSurfaceTracker>; |
| 70 |
| 71 GpuSurfaceTracker(); |
| 72 ~GpuSurfaceTracker(); |
| 73 |
| 74 base::Lock lock_; |
| 75 SurfaceMap surface_map_; |
| 76 int next_surface_id_; |
| 77 |
| 78 DISALLOW_COPY_AND_ASSIGN(GpuSurfaceTracker); |
| 79 }; |
| 80 |
| 81 #endif // CONTENT_BROWSER_GPU_GPU_SURFACE_TRACKER_H_ |
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