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1 /* | 1 /* |
2 * Copyright 2008 The Android Open Source Project | 2 * Copyright 2008 The Android Open Source Project |
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 SkPixelRef_DEFINED | 8 #ifndef SkPixelRef_DEFINED |
9 #define SkPixelRef_DEFINED | 9 #define SkPixelRef_DEFINED |
10 | 10 |
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258 void addGenIDChangeListener(GenIDChangeListener* listener); | 258 void addGenIDChangeListener(GenIDChangeListener* listener); |
259 | 259 |
260 // Call when this pixelref is part of the key to a resourcecache entry. This
allows the cache | 260 // Call when this pixelref is part of the key to a resourcecache entry. This
allows the cache |
261 // to know automatically those entries can be purged when this pixelref is c
hanged or deleted. | 261 // to know automatically those entries can be purged when this pixelref is c
hanged or deleted. |
262 void notifyAddedToCache() { | 262 void notifyAddedToCache() { |
263 fAddedToCache.store(true); | 263 fAddedToCache.store(true); |
264 } | 264 } |
265 | 265 |
266 virtual SkDiscardableMemory* diagnostic_only_getDiscardable() const { return
NULL; } | 266 virtual SkDiscardableMemory* diagnostic_only_getDiscardable() const { return
NULL; } |
267 | 267 |
| 268 /** |
| 269 * Returns true if the pixels are generated on-the-fly (when required). |
| 270 */ |
| 271 bool isLazyGenerated() const { return this->onIsLazyGenerated(); } |
| 272 |
268 protected: | 273 protected: |
269 /** | 274 /** |
270 * On success, returns true and fills out the LockRec for the pixels. On | 275 * On success, returns true and fills out the LockRec for the pixels. On |
271 * failure returns false and ignores the LockRec parameter. | 276 * failure returns false and ignores the LockRec parameter. |
272 * | 277 * |
273 * The caller will have already acquired a mutex for thread safety, so this | 278 * The caller will have already acquired a mutex for thread safety, so this |
274 * method need not do that. | 279 * method need not do that. |
275 */ | 280 */ |
276 virtual bool onNewLockPixels(LockRec*) = 0; | 281 virtual bool onNewLockPixels(LockRec*) = 0; |
277 | 282 |
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311 * This should be implemented in all serializable SkPixelRef derived classe
s. | 316 * This should be implemented in all serializable SkPixelRef derived classe
s. |
312 * SkBitmap::fPixelRefOffset + SkBitmap::getSafeSize() should never overflo
w this value, | 317 * SkBitmap::fPixelRefOffset + SkBitmap::getSafeSize() should never overflo
w this value, |
313 * otherwise the rendering code may attempt to read memory out of bounds. | 318 * otherwise the rendering code may attempt to read memory out of bounds. |
314 * | 319 * |
315 * @return default impl returns 0. | 320 * @return default impl returns 0. |
316 */ | 321 */ |
317 virtual size_t getAllocatedSizeInBytes() const; | 322 virtual size_t getAllocatedSizeInBytes() const; |
318 | 323 |
319 virtual bool onRequestLock(const LockRequest&, LockResult*); | 324 virtual bool onRequestLock(const LockRequest&, LockResult*); |
320 | 325 |
| 326 virtual bool onIsLazyGenerated() const { return false; } |
| 327 |
321 /** Return the mutex associated with this pixelref. This value is assigned | 328 /** Return the mutex associated with this pixelref. This value is assigned |
322 in the constructor, and cannot change during the lifetime of the object. | 329 in the constructor, and cannot change during the lifetime of the object. |
323 */ | 330 */ |
324 SkBaseMutex* mutex() const { return &fMutex; } | 331 SkBaseMutex* mutex() const { return &fMutex; } |
325 | 332 |
326 // only call from constructor. Flags this to always be locked, removing | 333 // only call from constructor. Flags this to always be locked, removing |
327 // the need to grab the mutex and call onLockPixels/onUnlockPixels. | 334 // the need to grab the mutex and call onLockPixels/onUnlockPixels. |
328 // Performance tweak to avoid those calls (esp. in multi-thread use case). | 335 // Performance tweak to avoid those calls (esp. in multi-thread use case). |
329 void setPreLocked(void*, size_t rowBytes, SkColorTable*); | 336 void setPreLocked(void*, size_t rowBytes, SkColorTable*); |
330 | 337 |
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391 /** | 398 /** |
392 * Allocate a new pixelref matching the specified ImageInfo, allocating | 399 * Allocate a new pixelref matching the specified ImageInfo, allocating |
393 * the memory for the pixels. If the ImageInfo requires a ColorTable, | 400 * the memory for the pixels. If the ImageInfo requires a ColorTable, |
394 * the pixelref will ref() the colortable. | 401 * the pixelref will ref() the colortable. |
395 * On failure return NULL. | 402 * On failure return NULL. |
396 */ | 403 */ |
397 virtual SkPixelRef* create(const SkImageInfo&, size_t rowBytes, SkColorTable
*) = 0; | 404 virtual SkPixelRef* create(const SkImageInfo&, size_t rowBytes, SkColorTable
*) = 0; |
398 }; | 405 }; |
399 | 406 |
400 #endif | 407 #endif |
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