1 | /* |
2 | * Copyright 2017 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 SkSerialProcs_DEFINED |
9 | #define SkSerialProcs_DEFINED |
10 | |
11 | #include "include/core/SkImage.h" |
12 | #include "include/core/SkPicture.h" |
13 | #include "include/core/SkTypeface.h" |
14 | |
15 | /** |
16 | * A serial-proc is asked to serialize the specified object (e.g. picture or image). |
17 | * If a data object is returned, it will be used (even if it is zero-length). |
18 | * If null is returned, then Skia will take its default action. |
19 | * |
20 | * The default action for pictures is to use Skia's internal format. |
21 | * The default action for images is to encode either in its native format or PNG. |
22 | * The default action for typefaces is to use Skia's internal format. |
23 | */ |
24 | |
25 | typedef sk_sp<SkData> (*SkSerialPictureProc)(SkPicture*, void* ctx); |
26 | typedef sk_sp<SkData> (*SkSerialImageProc)(SkImage*, void* ctx); |
27 | typedef sk_sp<SkData> (*SkSerialTypefaceProc)(SkTypeface*, void* ctx); |
28 | |
29 | /** |
30 | * Called with the encoded form of a picture (previously written with a custom |
31 | * SkSerialPictureProc proc). Return a picture object, or nullptr indicating failure. |
32 | */ |
33 | typedef sk_sp<SkPicture> (*SkDeserialPictureProc)(const void* data, size_t length, void* ctx); |
34 | |
35 | /** |
36 | * Called with the encoded from of an image. The proc can return an image object, or if it |
37 | * returns nullptr, then Skia will take its default action to try to create an image from the data. |
38 | * |
39 | * Note that unlike SkDeserialPictureProc and SkDeserialTypefaceProc, return nullptr from this |
40 | * does not indicate failure, but is a signal for Skia to take its default action. |
41 | */ |
42 | typedef sk_sp<SkImage> (*SkDeserialImageProc)(const void* data, size_t length, void* ctx); |
43 | |
44 | /** |
45 | * Called with the encoded form of a typeface (previously written with a custom |
46 | * SkSerialTypefaceProc proc). Return a typeface object, or nullptr indicating failure. |
47 | */ |
48 | typedef sk_sp<SkTypeface> (*SkDeserialTypefaceProc)(const void* data, size_t length, void* ctx); |
49 | |
50 | struct SK_API SkSerialProcs { |
51 | SkSerialPictureProc fPictureProc = nullptr; |
52 | void* fPictureCtx = nullptr; |
53 | |
54 | SkSerialImageProc fImageProc = nullptr; |
55 | void* fImageCtx = nullptr; |
56 | |
57 | SkSerialTypefaceProc fTypefaceProc = nullptr; |
58 | void* fTypefaceCtx = nullptr; |
59 | }; |
60 | |
61 | struct SK_API SkDeserialProcs { |
62 | SkDeserialPictureProc fPictureProc = nullptr; |
63 | void* fPictureCtx = nullptr; |
64 | |
65 | SkDeserialImageProc fImageProc = nullptr; |
66 | void* fImageCtx = nullptr; |
67 | |
68 | SkDeserialTypefaceProc fTypefaceProc = nullptr; |
69 | void* fTypefaceCtx = nullptr; |
70 | }; |
71 | |
72 | #endif |
73 | |
74 | |