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1 /* | |
2 * Copyright (C) 2013 Google Inc. All rights reserved. | |
3 * | |
4 * Redistribution and use in source and binary forms, with or without | |
5 * modification, are permitted provided that the following conditions | |
6 * are met: | |
7 * 1. Redistributions of source code must retain the above copyright | |
8 * notice, this list of conditions and the following disclaimer. | |
9 * 2. Redistributions in binary form must reproduce the above copyright | |
10 * notice, this list of conditions and the following disclaimer in the | |
11 * documentation and/or other materials provided with the distribution. | |
12 * | |
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | |
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
24 */ | |
25 | |
26 #ifndef DiscardablePixelRef_h | |
27 #define DiscardablePixelRef_h | |
28 | |
29 #include "SkBitmap.h" | |
30 #include "SkPixelRef.h" | |
31 | |
32 #include "platform/PlatformExport.h" | |
33 #include "public/platform/WebDiscardableMemory.h" | |
34 #include "wtf/OwnPtr.h" | |
35 #include "wtf/PassOwnPtr.h" | |
36 | |
37 namespace blink { | |
38 | |
39 // Class for allocating the DiscardablePixelRef object. | |
40 class PLATFORM_EXPORT DiscardablePixelRefAllocator : public SkBitmap::Allocator
{ | |
41 // SkBitmap::Allocator implementation. The discardable memory allocated | |
42 // after this call is locked and will not be purged until next | |
43 // onUnlockPixels(). | |
44 virtual bool allocPixelRef(SkBitmap*, SkColorTable*) OVERRIDE; | |
45 }; | |
46 | |
47 // PixelRef object whose memory can be discarded when pixels are unlocked. | |
48 class PLATFORM_EXPORT DiscardablePixelRef : public SkPixelRef { | |
49 public: | |
50 DiscardablePixelRef(const SkImageInfo&, size_t rowBytes, PassOwnPtr<SkMutex>
); | |
51 virtual ~DiscardablePixelRef(); | |
52 | |
53 static bool isDiscardable(SkPixelRef*); | |
54 bool allocAndLockDiscardableMemory(size_t); | |
55 | |
56 protected: | |
57 // SkPixelRef implementation. | |
58 virtual bool onNewLockPixels(LockRec*) OVERRIDE; | |
59 virtual void onUnlockPixels() OVERRIDE; | |
60 | |
61 private: | |
62 void* m_lockedMemory; | |
63 OwnPtr<WebDiscardableMemory> m_discardable; | |
64 OwnPtr<SkMutex> m_mutex; | |
65 size_t m_rowBytes; | |
66 }; | |
67 | |
68 } // namespace blink | |
69 | |
70 #endif | |
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