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74 lines
2.6 KiB
74 lines
2.6 KiB
/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkSerialProcs_DEFINED
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#define SkSerialProcs_DEFINED
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#include "SkImage.h"
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#include "SkPicture.h"
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#include "SkTypeface.h"
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/**
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* A serial-proc is asked to serialize the specified object (e.g. picture or image).
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* If a data object is returned, it will be used (even if it is zero-length).
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* If null is returned, then Skia will take its default action.
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*
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* The default action for pictures is to use Skia's internal format.
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* The default action for images is to encode either in its native format or PNG.
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* The default action for typefaces is to use Skia's internal format.
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*/
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typedef sk_sp<SkData> (*SkSerialPictureProc)(SkPicture*, void* ctx);
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typedef sk_sp<SkData> (*SkSerialImageProc)(SkImage*, void* ctx);
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typedef sk_sp<SkData> (*SkSerialTypefaceProc)(SkTypeface*, void* ctx);
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/**
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* Called with the encoded form of a picture (previously written with a custom
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* SkSerialPictureProc proc). Return a picture object, or nullptr indicating failure.
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*/
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typedef sk_sp<SkPicture> (*SkDeserialPictureProc)(const void* data, size_t length, void* ctx);
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/**
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* Called with the encoded from of an image. The proc can return an image object, or if it
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* returns nullptr, then Skia will take its default action to try to create an image from the data.
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*
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* Note that unlike SkDeserialPictureProc and SkDeserialTypefaceProc, return nullptr from this
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* does not indicate failure, but is a signal for Skia to take its default action.
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*/
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typedef sk_sp<SkImage> (*SkDeserialImageProc)(const void* data, size_t length, void* ctx);
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/**
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* Called with the encoded form of a typeface (previously written with a custom
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* SkSerialTypefaceProc proc). Return a typeface object, or nullptr indicating failure.
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*/
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typedef sk_sp<SkTypeface> (*SkDeserialTypefaceProc)(const void* data, size_t length, void* ctx);
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struct SK_API SkSerialProcs {
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SkSerialPictureProc fPictureProc = nullptr;
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void* fPictureCtx = nullptr;
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SkSerialImageProc fImageProc = nullptr;
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void* fImageCtx = nullptr;
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SkSerialTypefaceProc fTypefaceProc = nullptr;
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void* fTypefaceCtx = nullptr;
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};
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struct SK_API SkDeserialProcs {
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SkDeserialPictureProc fPictureProc = nullptr;
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void* fPictureCtx = nullptr;
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SkDeserialImageProc fImageProc = nullptr;
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void* fImageCtx = nullptr;
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SkDeserialTypefaceProc fTypefaceProc = nullptr;
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void* fTypefaceCtx = nullptr;
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};
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#endif
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