1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/pdf/SkPDFStream.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,100 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2010 Google Inc.
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkPDFStream_DEFINED
1.14 +#define SkPDFStream_DEFINED
1.15 +
1.16 +#include "SkPDFTypes.h"
1.17 +#include "SkRefCnt.h"
1.18 +#include "SkStream.h"
1.19 +#include "SkTemplates.h"
1.20 +
1.21 +class SkPDFCatalog;
1.22 +
1.23 +/** \class SkPDFStream
1.24 +
1.25 + A stream object in a PDF. Note, all streams must be indirect objects (via
1.26 + SkObjRef).
1.27 + TODO(vandebo): SkStream should be replaced by SkStreamRewindable when that
1.28 + is feasible.
1.29 +*/
1.30 +class SkPDFStream : public SkPDFDict {
1.31 + SK_DECLARE_INST_COUNT(SkPDFStream)
1.32 +public:
1.33 + /** Create a PDF stream. A Length entry is automatically added to the
1.34 + * stream dictionary. The stream may be retained (stream->ref() may be
1.35 + * called) so its contents must not be changed after calling this.
1.36 + * @param data The data part of the stream.
1.37 + */
1.38 + explicit SkPDFStream(SkData* data);
1.39 + /** Deprecated constructor. */
1.40 + explicit SkPDFStream(SkStream* stream);
1.41 + /** Create a PDF stream with the same content and dictionary entries
1.42 + * as the passed one.
1.43 + */
1.44 + explicit SkPDFStream(const SkPDFStream& pdfStream);
1.45 + virtual ~SkPDFStream();
1.46 +
1.47 + // The SkPDFObject interface.
1.48 + virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
1.49 + bool indirect);
1.50 + virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
1.51 +
1.52 +protected:
1.53 + enum State {
1.54 + kUnused_State, //!< The stream hasn't been requested yet.
1.55 + kNoCompression_State, //!< The stream's been requested in an
1.56 + // uncompressed form.
1.57 + kCompressed_State, //!< The stream's already been compressed.
1.58 + };
1.59 +
1.60 + /* Create a PDF stream with no data. The setData method must be called to
1.61 + * set the data.
1.62 + */
1.63 + SkPDFStream();
1.64 +
1.65 + // Populate the stream dictionary. This method returns false if
1.66 + // fSubstitute should be used.
1.67 + virtual bool populate(SkPDFCatalog* catalog);
1.68 +
1.69 + void setSubstitute(SkPDFStream* stream) {
1.70 + fSubstitute.reset(stream);
1.71 + }
1.72 +
1.73 + SkPDFStream* getSubstitute() {
1.74 + return fSubstitute.get();
1.75 + }
1.76 +
1.77 + void setData(SkData* data);
1.78 + void setData(SkStream* stream);
1.79 +
1.80 + SkStream* getData() {
1.81 + return fData.get();
1.82 + }
1.83 +
1.84 + void setState(State state) {
1.85 + fState = state;
1.86 + }
1.87 +
1.88 + State getState() {
1.89 + return fState;
1.90 + }
1.91 +
1.92 +private:
1.93 + // Indicates what form (or if) the stream has been requested.
1.94 + State fState;
1.95 +
1.96 + // TODO(vandebo): Use SkData (after removing deprecated constructor).
1.97 + SkAutoTUnref<SkStream> fData;
1.98 + SkAutoTUnref<SkPDFStream> fSubstitute;
1.99 +
1.100 + typedef SkPDFDict INHERITED;
1.101 +};
1.102 +
1.103 +#endif
