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1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkDiscardablePixelRef_DEFINED | 8 #ifndef SkDiscardablePixelRef_DEFINED |
9 #define SkDiscardablePixelRef_DEFINED | 9 #define SkDiscardablePixelRef_DEFINED |
10 | 10 |
11 #include "SkDiscardableMemory.h" | 11 #include "SkDiscardableMemory.h" |
12 #include "SkImageGenerator.h" | 12 #include "SkImageGenerator.h" |
13 #include "SkImageInfo.h" | 13 #include "SkImageInfo.h" |
14 #include "SkPixelRef.h" | 14 #include "SkPixelRef.h" |
15 | 15 |
16 /** | |
17 * A PixelRef backed by SkDiscardableMemory, with the ability to | |
18 * re-generate the pixels (via a SkImageGenerator) if the DM is | |
19 * purged. | |
20 * | |
21 * Since SkColorTable is reference-counted, we do not support indexed | |
22 * color with this class; there would be no way for the discardable | |
23 * memory system to unref the color table. | |
24 */ | |
25 class SkDiscardablePixelRef : public SkPixelRef { | 16 class SkDiscardablePixelRef : public SkPixelRef { |
26 public: | 17 public: |
27 SK_DECLARE_UNFLATTENABLE_OBJECT() | 18 SK_DECLARE_UNFLATTENABLE_OBJECT() |
28 | 19 |
29 protected: | 20 protected: |
30 ~SkDiscardablePixelRef(); | 21 ~SkDiscardablePixelRef(); |
31 virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE; | 22 virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE; |
32 virtual void onUnlockPixels() SK_OVERRIDE; | 23 virtual void onUnlockPixels() SK_OVERRIDE; |
33 virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } | 24 virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } |
34 | 25 |
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48 /* Takes ownership of SkImageGenerator. */ | 39 /* Takes ownership of SkImageGenerator. */ |
49 SkDiscardablePixelRef(const SkImageInfo&, SkImageGenerator*, | 40 SkDiscardablePixelRef(const SkImageInfo&, SkImageGenerator*, |
50 size_t rowBytes, | 41 size_t rowBytes, |
51 SkDiscardableMemory::Factory* factory); | 42 SkDiscardableMemory::Factory* factory); |
52 friend bool SkInstallDiscardablePixelRef(SkImageGenerator*, | 43 friend bool SkInstallDiscardablePixelRef(SkImageGenerator*, |
53 SkBitmap*, | 44 SkBitmap*, |
54 SkDiscardableMemory::Factory*); | 45 SkDiscardableMemory::Factory*); |
55 typedef SkPixelRef INHERITED; | 46 typedef SkPixelRef INHERITED; |
56 }; | 47 }; |
57 #endif // SkDiscardablePixelRef_DEFINED | 48 #endif // SkDiscardablePixelRef_DEFINED |
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