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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkMultiPictureDocumentReader_DEFINED
#define SkMultiPictureDocumentReader_DEFINED
#include "../private/SkTArray.h"
#include "SkPicture.h"
#include "SkSize.h"
#include "SkStream.h"
/** A lightweight helper class for reading a Skia MultiPictureDocument. */
class SkMultiPictureDocumentReader {
public:
/** Initialize the MultiPictureDocument. Does not take ownership
of the SkStreamSeekable. */
bool init(SkStreamSeekable*);
/** Return to factory settings. */
void reset() {
fSizes.reset();
fPages.reset();
}
/** Call this after calling init() (otherwise you'll always get zero). */
int pageCount() const { return fSizes.count(); }
/** Deserialize a page from the stream. Call init() first. The
SkStreamSeekable doesn't need to be the same object, but
should point to the same information as before. */
sk_sp<SkPicture> readPage(SkStreamSeekable*, int) const;
/** Fetch the size of the given page, without deserializing the
entire page. */
SkSize pageSize(int i) const { return fSizes[i]; }
private:
SkTArray<SkSize> fSizes;
size_t fOffset;
mutable SkTArray<sk_sp<SkPicture>> fPages;
};
#endif // SkMultiPictureDocumentReader_DEFINED
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