1 /* 2 * Copyright 2014 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 SkBitmapCache_DEFINED 9 #define SkBitmapCache_DEFINED 10 11 #include "SkRect.h" 12 #include <memory> 13 14 class SkBitmap; 15 class SkBitmapProvider; 16 class SkImage; 17 struct SkImageInfo; 18 class SkMipMap; 19 class SkPixmap; 20 class SkResourceCache; 21 22 uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID); 23 24 void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID); 25 26 struct SkBitmapCacheDesc { 27 uint32_t fImageID; // != 0 28 SkIRect fSubset; // always set to a valid rect (entire or subset) 29 validateSkBitmapCacheDesc30 void validate() const { 31 SkASSERT(fImageID); 32 SkASSERT(fSubset.fLeft >= 0 && fSubset.fTop >= 0); 33 SkASSERT(fSubset.width() > 0 && fSubset.height() > 0); 34 } 35 36 static SkBitmapCacheDesc Make(const SkImage*); 37 static SkBitmapCacheDesc Make(uint32_t genID, const SkIRect& subset); 38 }; 39 40 class SkBitmapCache { 41 public: 42 /** 43 * Search based on the desc. If found, returns true and 44 * result will be set to the matching bitmap with its pixels already locked. 45 */ 46 static bool Find(const SkBitmapCacheDesc&, SkBitmap* result); 47 48 class Rec; operatorRecDeleter49 struct RecDeleter { void operator()(Rec* r) { PrivateDeleteRec(r); } }; 50 typedef std::unique_ptr<Rec, RecDeleter> RecPtr; 51 52 static RecPtr Alloc(const SkBitmapCacheDesc&, const SkImageInfo&, SkPixmap*); 53 static void Add(RecPtr, SkBitmap*); 54 55 private: 56 static void PrivateDeleteRec(Rec*); 57 }; 58 59 class SkMipMapCache { 60 public: 61 static const SkMipMap* FindAndRef(const SkBitmapCacheDesc&, 62 SkResourceCache* localCache = nullptr); 63 static const SkMipMap* AddAndRef(const SkBitmapProvider&, 64 SkResourceCache* localCache = nullptr); 65 }; 66 67 #endif 68