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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 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 SkLazyPixelRef_DEFINED | 8 #ifndef SkLazyPixelRef_DEFINED |
9 #define SkLazyPixelRef_DEFINED | 9 #define SkLazyPixelRef_DEFINED |
10 | 10 |
11 #include "SkBitmapFactory.h" | 11 #include "SkBitmapFactory.h" |
12 #include "SkImage.h" | 12 #include "SkImage.h" |
13 #include "SkPixelRef.h" | 13 #include "SkPixelRef.h" |
14 #include "SkFlattenable.h" | 14 #include "SkFlattenable.h" |
15 | 15 |
16 class SkColorTable; | 16 class SkColorTable; |
17 class SkData; | 17 class SkData; |
18 class SkImageCache; | 18 class SkImageCache; |
19 | 19 |
| 20 #ifdef SK_DEBUG |
| 21 #define LAZY_CACHE_STATS 1 |
| 22 #elif !defined(LAZY_CACHE_STATS) |
| 23 #define LAZY_CACHE_STATS 0 |
| 24 #endif |
| 25 |
20 /** | 26 /** |
21 * PixelRef which defers decoding until SkBitmap::lockPixels() is called. | 27 * PixelRef which defers decoding until SkBitmap::lockPixels() is called. |
22 */ | 28 */ |
23 class SkLazyPixelRef : public SkPixelRef { | 29 class SkLazyPixelRef : public SkPixelRef { |
24 | 30 |
25 public: | 31 public: |
26 /** | 32 /** |
27 * Create a new SkLazyPixelRef. | 33 * Create a new SkLazyPixelRef. |
28 * @param SkData Encoded data representing the pixels. | 34 * @param SkData Encoded data representing the pixels. |
29 * @param DecodeProc Called to decode the pixels when needed. Must be non-N
ULL. | 35 * @param DecodeProc Called to decode the pixels when needed. Must be non-N
ULL. |
30 * @param SkImageCache Object that handles allocating and freeing the pixel
memory, as needed. | 36 * @param SkImageCache Object that handles allocating and freeing the pixel
memory, as needed. |
31 * Must not be NULL. | 37 * Must not be NULL. |
32 */ | 38 */ |
33 SkLazyPixelRef(SkData*, SkBitmapFactory::DecodeProc, SkImageCache*); | 39 SkLazyPixelRef(SkData*, SkBitmapFactory::DecodeProc, SkImageCache*); |
34 | 40 |
35 virtual ~SkLazyPixelRef(); | 41 virtual ~SkLazyPixelRef(); |
36 | 42 |
37 #ifdef SK_DEBUG | 43 #ifdef SK_DEBUG |
38 intptr_t getCacheId() const { return fCacheId; } | 44 intptr_t getCacheId() const { return fCacheId; } |
39 #endif | 45 #endif |
40 | 46 |
| 47 #if LAZY_CACHE_STATS |
| 48 static int32_t GetCacheHits() { return gCacheHits; } |
| 49 static int32_t GetCacheMisses() { return gCacheMisses; } |
| 50 static void ResetCacheStats() { gCacheHits = gCacheMisses = 0; } |
| 51 #endif |
| 52 |
41 // No need to flatten this object. When flattening an SkBitmap, SkOrderedWri
teBuffer will check | 53 // No need to flatten this object. When flattening an SkBitmap, SkOrderedWri
teBuffer will check |
42 // the encoded data and write that instead. | 54 // the encoded data and write that instead. |
43 // Future implementations of SkFlattenableWriteBuffer will need to special c
ase for | 55 // Future implementations of SkFlattenableWriteBuffer will need to special c
ase for |
44 // onRefEncodedData as well. | 56 // onRefEncodedData as well. |
45 SK_DECLARE_UNFLATTENABLE_OBJECT() | 57 SK_DECLARE_UNFLATTENABLE_OBJECT() |
46 | 58 |
47 protected: | 59 protected: |
48 virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE; | 60 virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE; |
49 virtual void onUnlockPixels() SK_OVERRIDE; | 61 virtual void onUnlockPixels() SK_OVERRIDE; |
50 virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } | 62 virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } |
51 virtual SkData* onRefEncodedData() SK_OVERRIDE; | 63 virtual SkData* onRefEncodedData() SK_OVERRIDE; |
52 | 64 |
53 private: | 65 private: |
54 bool fErrorInDecoding; | 66 bool fErrorInDecoding; |
55 SkData* fData; | 67 SkData* fData; |
56 SkBitmapFactory::DecodeProc fDecodeProc; | 68 SkBitmapFactory::DecodeProc fDecodeProc; |
57 SkImageCache* fImageCache; | 69 SkImageCache* fImageCache; |
58 intptr_t fCacheId; | 70 intptr_t fCacheId; |
59 | 71 |
| 72 #if LAZY_CACHE_STATS |
| 73 static int32_t gCacheHits; |
| 74 static int32_t gCacheMisses; |
| 75 #endif |
| 76 |
60 typedef SkPixelRef INHERITED; | 77 typedef SkPixelRef INHERITED; |
61 }; | 78 }; |
62 | 79 |
63 #endif // SkLazyPixelRef_DEFINED | 80 #endif // SkLazyPixelRef_DEFINED |
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