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#ifndef QPDF_STREAM_HH
#define QPDF_STREAM_HH
#include <qpdf/Types.h>
#include <qpdf/QPDFObject.hh>
#include <qpdf/QPDFObjectHandle.hh>
class Pipeline;
class QPDF;
class QPDF_Stream: public QPDFObject
{
public:
QPDF_Stream(QPDF*, int objid, int generation,
QPDFObjectHandle stream_dict,
qpdf_offset_t offset, size_t length);
virtual ~QPDF_Stream();
virtual std::string unparse();
virtual JSON getJSON();
virtual QPDFObject::object_type_e getTypeCode() const;
virtual char const* getTypeName() const;
virtual void setDescription(QPDF*, std::string const&);
QPDFObjectHandle getDict() const;
bool isDataModified() const;
// Methods to help QPDF copy foreign streams
qpdf_offset_t getOffset() const;
size_t getLength() const;
PointerHolder<Buffer> getStreamDataBuffer() const;
PointerHolder<QPDFObjectHandle::StreamDataProvider> getStreamDataProvider() const;
// See comments in QPDFObjectHandle.hh for these methods.
bool pipeStreamData(Pipeline*, bool* tried_filtering,
int encode_flags,
qpdf_stream_decode_level_e decode_level,
bool suppress_warnings, bool will_retry);
PointerHolder<Buffer> getStreamData(qpdf_stream_decode_level_e);
PointerHolder<Buffer> getRawStreamData();
void replaceStreamData(PointerHolder<Buffer> data,
QPDFObjectHandle const& filter,
QPDFObjectHandle const& decode_parms);
void replaceStreamData(
PointerHolder<QPDFObjectHandle::StreamDataProvider> provider,
QPDFObjectHandle const& filter,
QPDFObjectHandle const& decode_parms);
void addTokenFilter(
PointerHolder<QPDFObjectHandle::TokenFilter> token_filter);
void replaceDict(QPDFObjectHandle new_dict);
// Replace object ID and generation. This may only be called if
// object ID and generation are 0. It is used by QPDFObjectHandle
// when adding streams to files.
void setObjGen(int objid, int generation);
protected:
virtual void releaseResolved();
private:
static std::map<std::string, std::string> filter_abbreviations;
void replaceFilterData(QPDFObjectHandle const& filter,
QPDFObjectHandle const& decode_parms,
size_t length);
bool understandDecodeParams(
std::string const& filter, QPDFObjectHandle decode_params,
int& predictor, int& columns,
int& colors, int& bits_per_component,
bool& early_code_change);
bool filterable(std::vector<std::string>& filters,
bool& specialized_compression, bool& lossy_compression,
int& predictor, int& columns,
int& colors, int& bits_per_component,
bool& early_code_change);
void warn(QPDFExc const& e);
void setDictDescription();
void setStreamDescription();
QPDF* qpdf;
int objid;
int generation;
QPDFObjectHandle stream_dict;
qpdf_offset_t offset;
size_t length;
PointerHolder<Buffer> stream_data;
PointerHolder<QPDFObjectHandle::StreamDataProvider> stream_provider;
std::vector<
PointerHolder<QPDFObjectHandle::TokenFilter> > token_filters;
};
#endif // QPDF_STREAM_HH
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