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 "SkBitmap.h" 12 #include "SkMipMap.h" 13 14 class SkImage; 15 class SkResourceCache; 16 17 uint64_t SkMakeResourceCacheSharedIDForBitmap(uint32_t bitmapGenID); 18 19 void SkNotifyBitmapGenIDIsStale(uint32_t bitmapGenID); 20 21 struct SkBitmapCacheDesc { 22 uint32_t fImageID; // != 0 23 int32_t fScaledWidth; // 0 for unscaled 24 int32_t fScaledHeight; // 0 for unscaled 25 SkIRect fSubset; // always set to a valid rect (entire or subset) 26 27 void validate() const { 28 SkASSERT(fImageID); 29 if (fScaledWidth || fScaledHeight) { 30 SkASSERT(fScaledWidth && fScaledHeight); 31 } 32 SkASSERT(fSubset.fLeft >= 0 && fSubset.fTop >= 0); 33 SkASSERT(fSubset.width() > 0 && fSubset.height() > 0); 34 } 35 36 static SkBitmapCacheDesc Make(const SkBitmap&, int scaledWidth, int scaledHeight); 37 static SkBitmapCacheDesc Make(const SkBitmap&); 38 static SkBitmapCacheDesc Make(const SkImage*, int scaledWidth, int scaledHeight); 39 static SkBitmapCacheDesc Make(const SkImage*); 40 41 // Use with care -- width/height must match the original bitmap/image 42 static SkBitmapCacheDesc Make(uint32_t genID, int origWidth, int origHeight); 43 }; 44 45 class SkBitmapCache { 46 public: 47 /** 48 * Search based on the desc. If found, returns true and 49 * result will be set to the matching bitmap with its pixels already locked. 50 */ 51 static bool Find(const SkBitmapCacheDesc&, SkBitmap* result); 52 53 class Rec; 54 struct RecDeleter { void operator()(Rec* r) { PrivateDeleteRec(r); } }; 55 typedef std::unique_ptr<Rec, RecDeleter> RecPtr; 56 57 static RecPtr Alloc(const SkBitmapCacheDesc&, const SkImageInfo&, SkPixmap*); 58 static void Add(RecPtr, SkBitmap*); 59 60 private: 61 static void PrivateDeleteRec(Rec*); 62 }; 63 64 class SkMipMapCache { 65 public: 66 // Note: the scaled width/height in desc must be 0, as any other value would not make sense. 67 static const SkMipMap* FindAndRef(const SkBitmapCacheDesc&, SkDestinationSurfaceColorMode, 68 SkResourceCache* localCache = nullptr); 69 static const SkMipMap* AddAndRef(const SkBitmap& src, SkDestinationSurfaceColorMode, 70 SkResourceCache* localCache = nullptr); 71 }; 72 73 #endif 74
