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Side by Side Diff: chrome/browser/renderer_host/backing_store_manager.h

Issue 6532073: Move core pieces of browser\renderer_host to src\content. (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/
Patch Set: '' Created 9 years, 10 months ago
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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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