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