1 /* 2 * Copyright 2015 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 SkYUVPlanesCache_DEFINED 9 #define SkYUVPlanesCache_DEFINED 10 11 #include "SkCachedData.h" 12 #include "SkImageInfo.h" 13 14 class SkResourceCache; 15 16 class SkYUVPlanesCache { 17 public: 18 /** 19 * The Info struct contains data about the 3 Y, U and V planes of memory stored 20 * contiguously, in that order, as a single block of memory within SkYUVPlanesCache. 21 * 22 * fSize: Width and height of each of the 3 planes (in pixels). 23 * fSizeInMemory: Amount of memory allocated for each plane (may be different from 24 "height * rowBytes", depending on the jpeg decoder's block size). 25 * The sum of these is the total size stored within SkYUVPlanesCache. 26 * fRowBytes: rowBytes for each of the 3 planes (in bytes). 27 * fColorSpace: color space that will be used for the YUV -> RGB conversion. 28 */ 29 struct Info { 30 SkISize fSize[3]; 31 size_t fSizeInMemory[3]; 32 size_t fRowBytes[3]; 33 SkYUVColorSpace fColorSpace; 34 }; 35 /** 36 * On success, return a ref to the SkCachedData that holds the pixels. 37 * 38 * On failure, return nullptr. 39 */ 40 static SkCachedData* FindAndRef(uint32_t genID, Info* info, 41 SkResourceCache* localCache = nullptr); 42 43 /** 44 * Add a pixelRef ID and its YUV planes data to the cache. 45 */ 46 static void Add(uint32_t genID, SkCachedData* data, Info* info, 47 SkResourceCache* localCache = nullptr); 48 }; 49 50 #endif 51
