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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 #include "SkYUVSizeInfo.h"
14 
15 class SkResourceCache;
16 
17 class SkYUVPlanesCache {
18 public:
19     /**
20      * The Info struct contains data about the 3 Y, U and V planes of memory stored
21      * contiguously, in that order, as a single block of memory within SkYUVPlanesCache.
22      *
23      * fSizeInfo: fWidth, fHeight, and fWidthBytes of each of the Y, U, and V planes.
24      * fColorSpace: color space that will be used for the YUV -> RGB conversion.
25      */
26     struct Info {
27         SkYUVSizeInfo   fSizeInfo;
28         SkYUVColorSpace fColorSpace;
29     };
30     /**
31      * On success, return a ref to the SkCachedData that holds the pixels.
32      *
33      * On failure, return nullptr.
34      */
35     static SkCachedData* FindAndRef(uint32_t genID, Info* info,
36                                     SkResourceCache* localCache = nullptr);
37 
38     /**
39      * Add a pixelRef ID and its YUV planes data to the cache.
40      */
41     static void Add(uint32_t genID, SkCachedData* data, Info* info,
42                     SkResourceCache* localCache = nullptr);
43 };
44 
45 #endif
46