1 /* 2 * Copyright 2013 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkDiscardablePixelRef_DEFINED 9 #define SkDiscardablePixelRef_DEFINED 10 11 #include "SkDiscardableMemory.h" 12 #include "SkImageGenerator.h" 13 #include "SkImageInfo.h" 14 #include "SkPixelRef.h" 15 16 class SkDiscardablePixelRef : public SkPixelRef { 17 public: 18 SK_DECLARE_UNFLATTENABLE_OBJECT() 19 20 protected: 21 ~SkDiscardablePixelRef(); 22 virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE; 23 virtual void onUnlockPixels() SK_OVERRIDE; onLockPixelsAreWritable()24 virtual bool onLockPixelsAreWritable() const SK_OVERRIDE { return false; } 25 onRefEncodedData()26 virtual SkData* onRefEncodedData() SK_OVERRIDE { 27 return fGenerator->refEncodedData(); 28 } 29 30 private: 31 SkImageGenerator* const fGenerator; 32 SkDiscardableMemory::Factory* const fDMFactory; 33 const size_t fRowBytes; 34 // These const members should not change over the life of the 35 // PixelRef, since the SkBitmap doesn't expect them to change. 36 37 SkDiscardableMemory* fDiscardableMemory; 38 39 /* Takes ownership of SkImageGenerator. */ 40 SkDiscardablePixelRef(const SkImageInfo&, SkImageGenerator*, 41 size_t rowBytes, 42 SkDiscardableMemory::Factory* factory); 43 friend bool SkInstallDiscardablePixelRef(SkImageGenerator*, 44 SkBitmap*, 45 SkDiscardableMemory::Factory*); 46 typedef SkPixelRef INHERITED; 47 }; 48 #endif // SkDiscardablePixelRef_DEFINED 49