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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 #include "SkMasks.h" | |
9 #include "SkSwizzler.h" | |
10 #include "SkTypes.h" | |
11 | |
12 /* | |
13 * | |
14 * Used to swizzle images whose pixel components are extracted by bit masks | |
15 * Currently only used by bmp | |
16 * | |
17 */ | |
18 class SkMaskSwizzler { | |
19 public: | |
20 | |
21 /* | |
22 * | |
23 * Create a new swizzler | |
24 * @param masks Unowned pointer to helper class | |
25 * | |
26 */ | |
27 static SkMaskSwizzler* CreateMaskSwizzler(const SkImageInfo& imageInfo, | |
28 SkMasks* masks, | |
29 uint32_t bitsPerPixel); | |
30 | |
31 /* | |
32 * | |
33 * Swizzle the next row | |
34 * | |
35 */ | |
36 SkSwizzler::ResultAlpha next(void* dst, const uint8_t* src); | |
37 | |
38 private: | |
39 | |
40 /* | |
41 * | |
42 * Row procedure used for swizzle | |
43 * | |
44 */ | |
45 typedef SkSwizzler::ResultAlpha (*RowProc)( | |
46 void* dstRow, const uint8_t* srcRow, int width, | |
47 SkMasks* masks); | |
48 | |
49 /* | |
50 * | |
51 * Constructor for mask swizzler | |
52 * | |
53 */ | |
54 SkMaskSwizzler(const SkImageInfo& info, SkMasks* masks, RowProc proc); | |
55 | |
56 // Fields | |
57 const SkImageInfo& fImageInfo; | |
58 SkMasks* fMasks; // unowned | |
59 const RowProc fRowProc; | |
60 }; | |
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