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 "SkScalar.h" 12 #include "SkBitmap.h" 13 14 class SkResourceCache; 15 class SkMipMap; 16 17 class SkBitmapCache { 18 public: 19 /** 20 * Use this allocator for bitmaps, so they can use ashmem when available. 21 * Returns NULL if the ResourceCache has not been initialized with a DiscardableFactory. 22 */ 23 static SkBitmap::Allocator* GetAllocator(); 24 25 /** 26 * Search based on the src bitmap and inverse scales in X and Y. If found, returns true and 27 * result will be set to the matching bitmap with its pixels already locked. 28 */ 29 static bool Find(const SkBitmap& src, SkScalar invScaleX, SkScalar invScaleY, SkBitmap* result, 30 SkResourceCache* localCache = NULL); 31 32 /* 33 * result must be marked isImmutable() 34 */ 35 static void Add(const SkBitmap& src, SkScalar invScaleX, SkScalar invScaleY, 36 const SkBitmap& result, SkResourceCache* localCache = NULL); 37 38 /** 39 * Search based on the bitmap's genID and subset. If found, returns true and 40 * result will be set to the matching bitmap with its pixels already locked. 41 */ 42 static bool Find(uint32_t genID, const SkIRect& subset, SkBitmap* result, 43 SkResourceCache* localCache = NULL); 44 45 /** 46 * The width and the height of the provided subset must be the same as the result bitmap ones. 47 * result must be marked isImmutable() 48 */ 49 static bool Add(uint32_t genID, const SkIRect& subset, const SkBitmap& result, 50 SkResourceCache* localCache = NULL); 51 }; 52 53 class SkMipMapCache { 54 public: 55 static const SkMipMap* FindAndRef(const SkBitmap& src); 56 static void Add(const SkBitmap& src, const SkMipMap* result); 57 }; 58 59 #endif 60
