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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MANAGER_H_ | 5 #ifndef CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MANAGER_H_ |
6 #define CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MANAGER_H_ | 6 #define CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MANAGER_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <vector> | 9 // TODO(jam): remove this file when all files have been converted. |
10 | 10 #include "content/browser/renderer_host/backing_store_manager.h" |
11 #include "app/surface/transport_dib.h" | |
12 #include "base/basictypes.h" | |
13 #include "base/process.h" | |
14 #include "ui/gfx/rect.h" | |
15 #include "ui/gfx/size.h" | |
16 | |
17 class BackingStore; | |
18 class RenderWidgetHost; | |
19 | |
20 // This class manages backing stores in the browsr. Every RenderWidgetHost is | |
21 // associated with a backing store which it requests from this class. The | |
22 // hosts don't maintain any references to the backing stores. These backing | |
23 // stores are maintained in a cache which can be trimmed as needed. | |
24 class BackingStoreManager { | |
25 public: | |
26 // Returns a backing store which matches the desired dimensions. | |
27 // | |
28 // backing_store_rect | |
29 // The desired backing store dimensions. | |
30 // Returns a pointer to the backing store on success, NULL on failure. | |
31 static BackingStore* GetBackingStore(RenderWidgetHost* host, | |
32 const gfx::Size& desired_size); | |
33 | |
34 // Makes a backing store which is fully ready for consumption, i.e. the | |
35 // bitmap from the renderer has been copied into the backing store. | |
36 // | |
37 // backing_store_size | |
38 // The desired backing store dimensions. | |
39 // bitmap_section | |
40 // The bitmap section from the renderer. | |
41 // bitmap_rect | |
42 // The rect to be painted into the backing store | |
43 // needs_full_paint | |
44 // Set if we need to send out a request to paint the view | |
45 // to the renderer. | |
46 static void PrepareBackingStore( | |
47 RenderWidgetHost* host, | |
48 const gfx::Size& backing_store_size, | |
49 TransportDIB::Id bitmap, | |
50 const gfx::Rect& bitmap_rect, | |
51 const std::vector<gfx::Rect>& copy_rects, | |
52 bool* needs_full_paint); | |
53 | |
54 // Returns a matching backing store for the host. | |
55 // Returns NULL if we fail to find one. | |
56 static BackingStore* Lookup(RenderWidgetHost* host); | |
57 | |
58 // Removes the backing store for the host. | |
59 static void RemoveBackingStore(RenderWidgetHost* host); | |
60 | |
61 // Removes all backing stores. | |
62 static void RemoveAllBackingStores(); | |
63 | |
64 // Expires the given backing store. This emulates something getting evicted | |
65 // from the cache for the purpose of testing. Returns true if the host was | |
66 // removed, false if it wasn't found. | |
67 static bool ExpireBackingStoreForTest(RenderWidgetHost* host); | |
68 | |
69 // Current size in bytes of the backing store cache. | |
70 static size_t MemorySize(); | |
71 | |
72 private: | |
73 // Not intended for instantiation. | |
74 BackingStoreManager() {} | |
75 | |
76 DISALLOW_COPY_AND_ASSIGN(BackingStoreManager); | |
77 }; | |
78 | 11 |
79 #endif // CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MANAGER_H_ | 12 #endif // CHROME_BROWSER_RENDERER_HOST_BACKING_STORE_MANAGER_H_ |
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