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1 /* | |
2 * Copyright 2013 Google Inc. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license that can be | |
5 * found in the LICENSE file. | |
6 */ | |
7 | |
8 #ifndef SkDiscardablePixelRef_DEFINED | |
9 #define SkDiscardablePixelRef_DEFINED | |
10 | |
11 #include "SkPixelRef.h" | |
12 #include "SkImageGenerator.h" | |
13 #include "SkImageInfo.h" | |
14 | |
15 class SkDiscardableMemory; | |
16 | |
17 /** | |
18 * An interface that allows a purgable PixelRef to re-decode an image. | |
19 */ | |
20 | |
21 class SkDiscardablePixelRef : public SkPixelRef { | |
22 public: | |
23 /** | |
24 * Takes ownership of SkImageGenerator. | |
25 * Will modify SkBitmap | |
26 */ | |
27 static bool Install(SkImageGenerator* generator, SkBitmap* destination); | |
28 | |
29 SK_DECLARE_UNFLATTENABLE_OBJECT() | |
30 | |
31 protected: | |
32 ~SkDiscardablePixelRef(); | |
33 virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE; | |
34 virtual void onUnlockPixels() SK_OVERRIDE; | |
35 virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } | |
36 | |
37 virtual SkData* onRefEncodedData() SK_OVERRIDE { | |
38 return fGenerator->refEncodedData(); | |
39 } | |
40 | |
41 private: | |
42 SkImageGenerator* fGenerator; | |
43 SkDiscardableMemory* fDiscardableMemory; | |
44 SkImageInfo fInfo; | |
scroggo
2013/11/19 22:19:27
Can fInfo, fSize, and fRowBytes be const?
hal.canary
2013/11/20 00:07:10
Done.
Even the pointer can be const (but not the
| |
45 size_t fSize; // size of memeory to be allocated | |
scroggo
2013/11/19 22:19:27
memory*
hal.canary
2013/11/20 00:07:10
Done.
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46 size_t fRowBytes; // ??? | |
scroggo
2013/11/19 22:19:27
???
hal.canary
2013/11/20 00:07:10
Done.
| |
47 | |
48 /* Takes ownership of SkImageGenerator. */ | |
49 SkDiscardablePixelRef(SkImageGenerator* generator, | |
50 const SkImageInfo& info, | |
51 size_t size, | |
52 size_t rowBytes); | |
53 }; | |
54 #endif // SkDiscardablePixelRef_DEFINED | |
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