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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2008 The Android Open Source Project | 3 * Copyright 2008 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #ifndef SkMallocPixelRef_DEFINED | 10 #ifndef SkMallocPixelRef_DEFINED |
11 #define SkMallocPixelRef_DEFINED | 11 #define SkMallocPixelRef_DEFINED |
12 | 12 |
13 #include "SkPixelRef.h" | 13 #include "SkPixelRef.h" |
14 | 14 |
15 /** We explicitly use the same allocator for our pixels that SkMask does, | 15 /** We explicitly use the same allocator for our pixels that SkMask does, |
16 so that we can freely assign memory allocated by one class to the other. | 16 so that we can freely assign memory allocated by one class to the other. |
17 */ | 17 */ |
18 class SkMallocPixelRef : public SkPixelRef { | 18 class SkMallocPixelRef : public SkPixelRef { |
19 public: | 19 public: |
20 /** Allocate the specified buffer for pixels. The memory is freed when the | 20 /** |
21 last owner of this pixelref is gone. If addr is NULL, sk_malloc_throw() | 21 * Return a new SkMallocPixelRef with the provided pixel storage, rowBytes, |
22 is called to allocate it. | 22 * and optional colortable. The caller is responsible for managing the |
23 * lifetime of the pixel storage buffer. This pixelref will ref() the | |
24 * specified colortable (if not NULL). | |
scroggo
2013/11/20 21:04:28
Can you add a comment that this does not take owne
reed1
2013/11/20 21:27:18
"The caller is responsible for managing the lifet
scroggo
2013/11/20 21:35:19
D'oh! No, that's clear.
| |
25 * | |
26 * Returns NULL on failure. | |
23 */ | 27 */ |
24 SkMallocPixelRef(void* addr, size_t size, SkColorTable* ctable, bool ownPixe ls = true); | 28 static SkMallocPixelRef* Create(const SkImageInfo&, void* addr, |
scroggo
2013/11/20 21:04:28
Maybe a better name for this would be Wrap or Wrap
reed1
2013/11/20 21:27:18
Hmmm
| |
25 virtual ~SkMallocPixelRef(); | 29 size_t rowBytes, SkColorTable*); |
30 /** | |
31 * Return a new SkMallocPixelRef, automatically allocating storage for the | |
32 * pixels. If rowBytes are 0, an optimal value will be chosen automatically . | |
33 * If rowBytes is > 0, then it will be respected, or NULL will be returned | |
34 * if rowBytes is invalid for the specified info. | |
35 * | |
36 * Returns NULL on failure. | |
37 */ | |
38 static SkMallocPixelRef* Allocate(const SkImageInfo& info, | |
39 size_t rowBytes, SkColorTable*); | |
26 | 40 |
27 //! Return the allocation size for the pixels | |
28 size_t getSize() const { return fSize; } | |
29 void* getAddr() const { return fStorage; } | 41 void* getAddr() const { return fStorage; } |
30 | 42 |
31 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMallocPixelRef) | 43 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMallocPixelRef) |
32 | 44 |
33 protected: | 45 protected: |
34 // overrides from SkPixelRef | 46 virtual void* onLockPixels(SkImageInfo*, size_t*, SkColorTable**) SK_OVERRID E; |
35 virtual void* onLockPixels(SkColorTable**); | 47 virtual void onUnlockPixels() SK_OVERRIDE; |
36 virtual void onUnlockPixels(); | 48 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; |
37 | 49 |
38 SkMallocPixelRef(SkFlattenableReadBuffer& buffer); | 50 SkMallocPixelRef(SkFlattenableReadBuffer& buffer); |
39 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; | 51 SkMallocPixelRef(const SkImageInfo&, void* addr, size_t rb, SkColorTable*, |
52 bool ownsPixels); | |
53 virtual ~SkMallocPixelRef(); | |
40 | 54 |
41 private: | 55 private: |
42 void* fStorage; | 56 void* fStorage; |
43 size_t fSize; | 57 SkColorTable* fCTable; |
44 SkColorTable* fCTable; | 58 size_t fRB; |
45 bool fOwnPixels; | 59 SkImageInfo fInfo; |
60 const bool fOwnPixels; | |
61 | |
62 size_t computeMinSize() const { | |
63 if (fInfo.fHeight == 0) { | |
64 return 0; | |
65 } | |
66 return (fInfo.fHeight - 1) * fRB + fInfo.minRowBytes(); | |
67 } | |
46 | 68 |
47 typedef SkPixelRef INHERITED; | 69 typedef SkPixelRef INHERITED; |
48 }; | 70 }; |
49 | 71 |
50 | 72 |
51 #endif | 73 #endif |
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