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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPixelSerializer_DEFINED
#define SkPixelSerializer_DEFINED
#include "SkRefCnt.h"
#include "SkPixmap.h"
class SkData;
/**
* Interface for serializing pixels, e.g. SkBitmaps in an SkPicture.
*/
class SkPixelSerializer : public SkRefCnt {
public:
virtual ~SkPixelSerializer() {}
/**
* Call to determine if the client wants to serialize the encoded data. If
* false, serialize another version (e.g. the result of encodePixels).
*/
bool useEncodedData(const void* data, size_t len) {
return this->onUseEncodedData(data, len);
}
/**
* Call to get the client's version of encoding these pixels. If it
* returns NULL, serialize the raw pixels.
*/
sk_sp<SkData> encodeToData(const SkPixmap& pixmap) {
return sk_sp<SkData>(this->onEncode(pixmap));
}
#ifdef SK_SUPPORT_LEGACY_IMAGE_ENCODE_API
SkData* encode(const SkPixmap& pixmap) {
return this->encodeToData(pixmap).release();
}
#endif
protected:
/**
* Return true if you want to serialize the encoded data, false if you want
* another version serialized (e.g. the result of this->encode()).
*/
virtual bool onUseEncodedData(const void* data, size_t len) = 0;
/**
* If you want to encode these pixels, return the encoded data as an SkData
* Return null if you want to serialize the raw pixels.
*/
virtual SkData* onEncode(const SkPixmap&) = 0;
};
#endif // SkPixelSerializer_DEFINED
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