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| 1 /* | 1 /* |
| 2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 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 SkDiscardablePixelRef_DEFINED | 8 #ifndef SkDiscardablePixelRef_DEFINED |
| 9 #define SkDiscardablePixelRef_DEFINED | 9 #define SkDiscardablePixelRef_DEFINED |
| 10 | 10 |
| 11 #include "SkDiscardableMemory.h" | 11 #include "SkDiscardableMemory.h" |
| 12 #include "SkImageGenerator.h" | 12 #include "SkImageGenerator.h" |
| 13 #include "SkImageInfo.h" | 13 #include "SkImageInfo.h" |
| 14 #include "SkPixelRef.h" | 14 #include "SkPixelRef.h" |
| 15 | 15 |
| 16 /** | 16 /** |
| 17 * A PixelRef backed by SkDiscardableMemory, with the ability to | 17 * A PixelRef backed by SkDiscardableMemory, with the ability to |
| 18 * re-generate the pixels (via a SkImageGenerator) if the DM is | 18 * re-generate the pixels (via a SkImageGenerator) if the DM is |
| 19 * purged. | 19 * purged. |
| 20 */ | 20 */ |
| 21 class SkDiscardablePixelRef : public SkPixelRef { | 21 class SkDiscardablePixelRef : public SkPixelRef { |
| 22 public: | 22 public: |
| 23 SK_DECLARE_INST_COUNT(SkDiscardablePixelRef) | 23 SK_DECLARE_INST_COUNT(SkDiscardablePixelRef) |
| 24 | 24 |
| 25 protected: | 25 protected: |
| 26 ~SkDiscardablePixelRef(); | 26 ~SkDiscardablePixelRef(); |
| 27 | 27 |
| 28 bool onNewLockPixels(LockRec*) SK_OVERRIDE; | 28 bool onNewLockPixels(LockRec*) override; |
| 29 void onUnlockPixels() SK_OVERRIDE; | 29 void onUnlockPixels() override; |
| 30 bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } | 30 bool onLockPixelsAreWritable() const override { return false; } |
| 31 | 31 |
| 32 SkData* onRefEncodedData() SK_OVERRIDE { | 32 SkData* onRefEncodedData() override { |
| 33 return fGenerator->refEncodedData(); | 33 return fGenerator->refEncodedData(); |
| 34 } | 34 } |
| 35 | 35 |
| 36 private: | 36 private: |
| 37 SkImageGenerator* const fGenerator; | 37 SkImageGenerator* const fGenerator; |
| 38 SkDiscardableMemory::Factory* const fDMFactory; | 38 SkDiscardableMemory::Factory* const fDMFactory; |
| 39 const size_t fRowBytes; | 39 const size_t fRowBytes; |
| 40 // These const members should not change over the life of the | 40 // These const members should not change over the life of the |
| 41 // PixelRef, since the SkBitmap doesn't expect them to change. | 41 // PixelRef, since the SkBitmap doesn't expect them to change. |
| 42 | 42 |
| 43 SkDiscardableMemory* fDiscardableMemory; | 43 SkDiscardableMemory* fDiscardableMemory; |
| 44 bool fDiscardableMemoryIsLocked; | 44 bool fDiscardableMemoryIsLocked; |
| 45 SkAutoTUnref<SkColorTable> fCTable; | 45 SkAutoTUnref<SkColorTable> fCTable; |
| 46 | 46 |
| 47 /* Takes ownership of SkImageGenerator. */ | 47 /* Takes ownership of SkImageGenerator. */ |
| 48 SkDiscardablePixelRef(const SkImageInfo&, SkImageGenerator*, | 48 SkDiscardablePixelRef(const SkImageInfo&, SkImageGenerator*, |
| 49 size_t rowBytes, | 49 size_t rowBytes, |
| 50 SkDiscardableMemory::Factory* factory); | 50 SkDiscardableMemory::Factory* factory); |
| 51 | 51 |
| 52 virtual bool onGetYUV8Planes(SkISize sizes[3], | 52 virtual bool onGetYUV8Planes(SkISize sizes[3], |
| 53 void* planes[3], | 53 void* planes[3], |
| 54 size_t rowBytes[3], | 54 size_t rowBytes[3], |
| 55 SkYUVColorSpace* colorSpace) SK_OVERRIDE { | 55 SkYUVColorSpace* colorSpace) override { |
| 56 // If the image was already decoded with lockPixels(), favor not | 56 // If the image was already decoded with lockPixels(), favor not |
| 57 // re-decoding to YUV8 planes. | 57 // re-decoding to YUV8 planes. |
| 58 if (fDiscardableMemory) { | 58 if (fDiscardableMemory) { |
| 59 return false; | 59 return false; |
| 60 } | 60 } |
| 61 return fGenerator->getYUV8Planes(sizes, planes, rowBytes, colorSpace); | 61 return fGenerator->getYUV8Planes(sizes, planes, rowBytes, colorSpace); |
| 62 } | 62 } |
| 63 | 63 |
| 64 friend bool SkInstallDiscardablePixelRef(SkImageGenerator*, SkBitmap*, | 64 friend bool SkInstallDiscardablePixelRef(SkImageGenerator*, SkBitmap*, |
| 65 SkDiscardableMemory::Factory*); | 65 SkDiscardableMemory::Factory*); |
| 66 | 66 |
| 67 typedef SkPixelRef INHERITED; | 67 typedef SkPixelRef INHERITED; |
| 68 }; | 68 }; |
| 69 | 69 |
| 70 #endif // SkDiscardablePixelRef_DEFINED | 70 #endif // SkDiscardablePixelRef_DEFINED |
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