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 "SkImage.h" 12 #include "SkPicture.h" 13 #include "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
