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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 SkPixelRef_DEFINED | 10 #ifndef SkPixelRef_DEFINED |
11 #define SkPixelRef_DEFINED | 11 #define SkPixelRef_DEFINED |
12 | 12 |
13 #include "SkBitmap.h" | 13 #include "SkBitmap.h" |
14 #include "SkRefCnt.h" | 14 #include "SkRefCnt.h" |
15 #include "SkString.h" | 15 #include "SkString.h" |
16 #include "SkFlattenable.h" | 16 #include "SkFlattenable.h" |
17 #include "SkTDArray.h" | 17 #include "SkTDArray.h" |
18 | 18 |
19 //#define SK_SUPPORT_LEGACY_PIXELREF_CONSTRUCTOR | |
20 | |
21 #ifdef SK_DEBUG | 19 #ifdef SK_DEBUG |
22 /** | 20 /** |
23 * Defining SK_IGNORE_PIXELREF_SETPRELOCKED will force all pixelref | 21 * Defining SK_IGNORE_PIXELREF_SETPRELOCKED will force all pixelref |
24 * subclasses to correctly handle lock/unlock pixels. For performance | 22 * subclasses to correctly handle lock/unlock pixels. For performance |
25 * reasons, simple malloc-based subclasses call setPreLocked() to skip | 23 * reasons, simple malloc-based subclasses call setPreLocked() to skip |
26 * the overhead of implementing these calls. | 24 * the overhead of implementing these calls. |
27 * | 25 * |
28 * This build-flag disables that optimization, to add in debugging our | 26 * This build-flag disables that optimization, to add in debugging our |
29 * call-sites, to ensure that they correctly balance their calls of | 27 * call-sites, to ensure that they correctly balance their calls of |
30 * lock and unlock. | 28 * lock and unlock. |
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44 This class is the smart container for pixel memory, and is used with | 42 This class is the smart container for pixel memory, and is used with |
45 SkBitmap. A pixelref is installed into a bitmap, and then the bitmap can | 43 SkBitmap. A pixelref is installed into a bitmap, and then the bitmap can |
46 access the actual pixel memory by calling lockPixels/unlockPixels. | 44 access the actual pixel memory by calling lockPixels/unlockPixels. |
47 | 45 |
48 This class can be shared/accessed between multiple threads. | 46 This class can be shared/accessed between multiple threads. |
49 */ | 47 */ |
50 class SK_API SkPixelRef : public SkFlattenable { | 48 class SK_API SkPixelRef : public SkFlattenable { |
51 public: | 49 public: |
52 SK_DECLARE_INST_COUNT(SkPixelRef) | 50 SK_DECLARE_INST_COUNT(SkPixelRef) |
53 | 51 |
54 #ifdef SK_SUPPORT_LEGACY_PIXELREF_CONSTRUCTOR | |
55 // DEPRECATED -- use a constructor that takes SkImageInfo | |
56 explicit SkPixelRef(SkBaseMutex* mutex = NULL); | |
57 #endif | |
58 | |
59 explicit SkPixelRef(const SkImageInfo&); | 52 explicit SkPixelRef(const SkImageInfo&); |
60 SkPixelRef(const SkImageInfo&, SkBaseMutex* mutex); | 53 SkPixelRef(const SkImageInfo&, SkBaseMutex* mutex); |
61 virtual ~SkPixelRef(); | 54 virtual ~SkPixelRef(); |
62 | 55 |
63 const SkImageInfo& info() const { | 56 const SkImageInfo& info() const { |
64 return fInfo; | 57 return fInfo; |
65 } | 58 } |
66 | 59 |
67 /** Return the pixel memory returned from lockPixels, or null if the | 60 /** Return the pixel memory returned from lockPixels, or null if the |
68 lockCount is 0. | 61 lockCount is 0. |
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293 SkPixelRef(SkFlattenableReadBuffer&, SkBaseMutex*); | 286 SkPixelRef(SkFlattenableReadBuffer&, SkBaseMutex*); |
294 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; | 287 virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE; |
295 | 288 |
296 // only call from constructor. Flags this to always be locked, removing | 289 // only call from constructor. Flags this to always be locked, removing |
297 // the need to grab the mutex and call onLockPixels/onUnlockPixels. | 290 // the need to grab the mutex and call onLockPixels/onUnlockPixels. |
298 // Performance tweak to avoid those calls (esp. in multi-thread use case). | 291 // Performance tweak to avoid those calls (esp. in multi-thread use case). |
299 void setPreLocked(void* pixels, SkColorTable* ctable); | 292 void setPreLocked(void* pixels, SkColorTable* ctable); |
300 | 293 |
301 private: | 294 private: |
302 SkBaseMutex* fMutex; // must remain in scope for the life of this object | 295 SkBaseMutex* fMutex; // must remain in scope for the life of this object |
303 // FIXME: fInfo should be const once we remove old constructor that does | 296 |
304 // not set it. | 297 const SkImageInfo fInfo; |
305 SkImageInfo fInfo; | |
306 | 298 |
307 void* fPixels; | 299 void* fPixels; |
308 SkColorTable* fColorTable; // we do not track ownership, subclass does | 300 SkColorTable* fColorTable; // we do not track ownership, subclass does |
309 int fLockCount; | 301 int fLockCount; |
310 | 302 |
311 mutable uint32_t fGenerationID; | 303 mutable uint32_t fGenerationID; |
312 mutable bool fUniqueGenerationID; | 304 mutable bool fUniqueGenerationID; |
313 | 305 |
314 SkTDArray<GenIDChangeListener*> fGenIDChangeListeners; // pointers are owne
d | 306 SkTDArray<GenIDChangeListener*> fGenIDChangeListeners; // pointers are owne
d |
315 | 307 |
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327 | 319 |
328 // When copying a bitmap to another with the same shape and config, we can s
afely | 320 // When copying a bitmap to another with the same shape and config, we can s
afely |
329 // clone the pixelref generation ID too, which makes them equivalent under c
aching. | 321 // clone the pixelref generation ID too, which makes them equivalent under c
aching. |
330 friend class SkBitmap; // only for cloneGenID | 322 friend class SkBitmap; // only for cloneGenID |
331 void cloneGenID(const SkPixelRef&); | 323 void cloneGenID(const SkPixelRef&); |
332 | 324 |
333 typedef SkFlattenable INHERITED; | 325 typedef SkFlattenable INHERITED; |
334 }; | 326 }; |
335 | 327 |
336 #endif | 328 #endif |
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