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76 lines
2.2 KiB
C++
76 lines
2.2 KiB
C++
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/*
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* Copyright 2010 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 SkPDFStream_DEFINED
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#define SkPDFStream_DEFINED
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#include "SkPDFTypes.h"
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#include "SkRefCnt.h"
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#include "SkStream.h"
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#include "SkTemplates.h"
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class SkPDFCatalog;
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/** \class SkPDFStream
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A stream object in a PDF. Note, all streams must be indirect objects (via
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SkObjRef).
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*/
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class SkPDFStream : public SkPDFDict {
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public:
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/** Create a PDF stream. A Length entry is automatically added to the
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* stream dictionary. The stream may be retained (stream->ref() may be
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* called) so its contents must not be changed after calling this.
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* @param data The data part of the stream.
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*/
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explicit SkPDFStream(SkData* data);
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/** Deprecated constructor. */
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explicit SkPDFStream(SkStream* stream);
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/** Create a PDF stream with the same content and dictionary entries
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* as the passed one.
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*/
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explicit SkPDFStream(const SkPDFStream& pdfStream);
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virtual ~SkPDFStream();
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// The SkPDFObject interface.
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virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
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bool indirect);
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virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
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protected:
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/* Create a PDF stream with no data. The setData method must be called to
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* set the data.
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*/
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SkPDFStream();
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void setData(SkStream* stream);
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private:
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enum State {
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kUnused_State, //!< The stream hasn't been requested yet.
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kNoCompression_State, //!< The stream's been requested in an
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// uncompressed form.
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kCompressed_State, //!< The stream's already been compressed.
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};
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// Indicates what form (or if) the stream has been requested.
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State fState;
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// TODO(vandebo): Use SkData (after removing deprecated constructor).
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SkRefPtr<SkStream> fData;
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SkRefPtr<SkPDFStream> fSubstitute;
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typedef SkPDFDict INHERITED;
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// Populate the stream dictionary. This method returns false if
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// fSubstitute should be used.
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bool populate(SkPDFCatalog* catalog);
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};
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#endif
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