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/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkPDFImageStream_DEFINED
#define SkPDFImageStream_DEFINED
#include "SkBitmap.h"
#include "SkPDFDevice.h"
#include "SkPDFStream.h"
#include "SkPDFTypes.h"
#include "SkRect.h"
#include "SkRefCnt.h"
#include "SkStream.h"
#include "SkTemplates.h"
class SkPDFCatalog;
/** \class SkPDFImageStream
An image stream object in a PDF. Note, all streams must be indirect objects
(via SkObjRef).
This class is similar to SkPDFStream, but it is also able to use image
specific compression. Currently we support DCT(jpeg) and flate(zip).
*/
class SkPDFImageStream : public SkPDFStream {
public:
/** Create a PDF stream with the same content and dictionary entries
* as the passed one.
*/
explicit SkPDFImageStream(const SkPDFImageStream& pdfStream);
virtual ~SkPDFImageStream();
protected:
SkPDFImageStream(SkStream* stream, const SkBitmap& bitmap,
const SkIRect& srcRect, EncodeToDCTStream encoder);
// Populate the stream dictionary. This method returns false if
// fSubstitute should be used.
virtual bool populate(SkPDFCatalog* catalog);
private:
const SkBitmap fBitmap;
const SkIRect fSrcRect;
EncodeToDCTStream fEncoder;
typedef SkPDFStream INHERITED;
};
#endif
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