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1 /* | 1 /* |
2 * Copyright 2014 Google Inc. | 2 * Copyright 2014 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkPixelSerializer_DEFINED | 8 #ifndef SkPixelSerializer_DEFINED |
9 #define SkPixelSerializer_DEFINED | 9 #define SkPixelSerializer_DEFINED |
10 | 10 |
| 11 #include "SkData.h" |
| 12 #include "SkPixmap.h" |
11 #include "SkRefCnt.h" | 13 #include "SkRefCnt.h" |
12 | 14 |
13 class SkData; | |
14 struct SkImageInfo; | 15 struct SkImageInfo; |
15 | 16 |
16 /** | 17 /** |
17 * Interface for serializing pixels, e.g. SkBitmaps in an SkPicture. | 18 * Interface for serializing pixels, e.g. SkBitmaps in an SkPicture. |
18 */ | 19 */ |
19 class SkPixelSerializer : public SkRefCnt { | 20 class SkPixelSerializer : public SkRefCnt { |
20 public: | 21 public: |
21 virtual ~SkPixelSerializer() {} | |
22 | |
23 /** | 22 /** |
24 * Call to determine if the client wants to serialize the encoded data. If | 23 * Call to determine if the client wants to serialize the encoded data. |
25 * false, serialize another version (e.g. the result of encodePixels). | 24 * |
| 25 * If the encoded data is can be re-encoded (or taken as is), this returns
a ref to a data |
| 26 * with the result, which the caller must unref() when they are through. Th
e returned |
| 27 * data may be the same as the input, or it may be different, but either wa
y the caller is |
| 28 * responsible for calling unref() on it. |
| 29 * |
| 30 * If the encoded data is not acceptable to this pixel serializer, this ret
urns NULL. |
26 */ | 31 */ |
27 bool useEncodedData(const void* data, size_t len) { | 32 SkData* reencodeData(SkData* encoded); |
28 return this->onUseEncodedData(data, len); | |
29 } | |
30 | 33 |
31 /** | 34 /** |
32 * Call to get the client's version of encoding these pixels. If it | 35 * Call to get the client's version of encoding these pixels. If it |
33 * returns NULL, serialize the raw pixels. | 36 * returns NULL, serialize the raw pixels. |
34 */ | 37 */ |
35 SkData* encodePixels(const SkImageInfo& info, const void* pixels, size_t row
Bytes) { | 38 SkData* encodePixels(const SkImageInfo& info, const void* pixels, size_t row
Bytes); |
36 return this->onEncodePixels(info, pixels, rowBytes); | 39 |
| 40 /** |
| 41 * Call to get the client's version of encoding these pixels. If it |
| 42 * returns NULL, serialize the raw pixels. |
| 43 */ |
| 44 SkData* encodePixels(const SkPixmap& pixmap); |
| 45 |
| 46 protected: |
| 47 // DEPRECATED -- this is no longer called, so remove from your subclasses! |
| 48 virtual bool onUseEncodedData(const void*, size_t) { return true; } |
| 49 |
| 50 virtual SkData* onReencodeData(SkData* encoded) { |
| 51 return SkRef(encoded); |
37 } | 52 } |
38 | 53 |
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&, const void* pixels, size_
t rowBytes) = 0; | 54 virtual SkData* onEncodePixels(const SkImageInfo&, const void* pixels, size_
t rowBytes) = 0; |
51 }; | 55 }; |
52 #endif // SkPixelSerializer_DEFINED | 56 #endif // SkPixelSerializer_DEFINED |
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