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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 SkPixelSerializer_DEFINED | |
9 #define SkPixelSerializer_DEFINED | |
10 | |
11 #include "SkRefCnt.h" | |
12 | |
13 class SkData; | |
14 struct SkImageInfo; | |
15 | |
16 /** | |
17 * Interface for serializing pixels, e.g. SkBitmaps in an SkPicture. | |
18 */ | |
19 class SkPixelSerializer : public SkRefCnt { | |
20 public: | |
21 virtual ~SkPixelSerializer() {} | |
22 | |
23 /** | |
24 * Call to determine if the client wants to serialize the encoded data. If | |
25 * false, serialize another version (e.g. the result of encodePixels). | |
26 */ | |
27 bool useEncodedData(const void* data, size_t len) { | |
28 return this->onUseEncodedData(data, len); | |
29 } | |
30 | |
31 /** | |
32 * Call to get the client's version of encoding these pixels. If it | |
33 * returns NULL, serialize the raw pixels. | |
34 */ | |
35 SkData* encodePixels(const SkImageInfo& info, void* pixels, size_t rowBytes)
{ | |
36 return this->onEncodePixels(info, pixels, rowBytes); | |
37 } | |
38 | |
39 protected: | |
40 /** | |
41 * Return true if you want to serialize the encoded data, false if you want | |
42 * another version serialized (e.g. the result of encodePixels). | |
43 */ | |
44 virtual bool onUseEncodedData(const void* data, size_t len) = 0; | |
45 | |
46 /** | |
47 * If you want to encode these pixels, return the encoded data as an SkData | |
48 * Return null if you want to serialize the raw pixels. | |
49 */ | |
50 virtual SkData* onEncodePixels(const SkImageInfo&, void* pixels, size_t rowB
ytes) = 0; | |
51 }; | |
52 #endif // SkPixelSerializer_DEFINED | |
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