QPDF_Stream.hh
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#ifndef QPDF_STREAM_HH
#define QPDF_STREAM_HH
#include <qpdf/Types.h>
#include <qpdf/QPDFObjectHandle.hh>
#include <qpdf/QPDFStreamFilter.hh>
#include <qpdf/QPDFValue.hh>
#include <functional>
#include <memory>
class Pipeline;
class QPDF;
class QPDF_Stream: public QPDFValue
{
public:
virtual ~QPDF_Stream() = default;
static std::shared_ptr<QPDFObject> create(
QPDF*,
QPDFObjGen const& og,
QPDFObjectHandle stream_dict,
qpdf_offset_t offset,
size_t length);
virtual std::shared_ptr<QPDFObject> copy(bool shallow = false);
virtual std::string unparse();
virtual JSON getJSON(int json_version);
virtual void setDescription(
QPDF*,
std::shared_ptr<QPDFValue::Description>& description,
qpdf_offset_t offset);
virtual void disconnect();
QPDFObjectHandle getDict() const;
bool isDataModified() const;
void setFilterOnWrite(bool);
bool getFilterOnWrite() const;
// Methods to help QPDF copy foreign streams
size_t getLength() const;
std::shared_ptr<Buffer> getStreamDataBuffer() const;
std::shared_ptr<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);
std::shared_ptr<Buffer> getStreamData(qpdf_stream_decode_level_e);
std::shared_ptr<Buffer> getRawStreamData();
void replaceStreamData(
std::shared_ptr<Buffer> data,
QPDFObjectHandle const& filter,
QPDFObjectHandle const& decode_parms);
void replaceStreamData(
std::shared_ptr<QPDFObjectHandle::StreamDataProvider> provider,
QPDFObjectHandle const& filter,
QPDFObjectHandle const& decode_parms);
void
addTokenFilter(std::shared_ptr<QPDFObjectHandle::TokenFilter> token_filter);
JSON getStreamJSON(
int json_version,
qpdf_json_stream_data_e json_data,
qpdf_stream_decode_level_e decode_level,
Pipeline* p,
std::string const& data_filename);
void replaceDict(QPDFObjectHandle const& new_dict);
static void registerStreamFilter(
std::string const& filter_name,
std::function<std::shared_ptr<QPDFStreamFilter>()> factory);
private:
QPDF_Stream(
QPDF*,
QPDFObjGen const& og,
QPDFObjectHandle stream_dict,
qpdf_offset_t offset,
size_t length);
static std::map<std::string, std::string> filter_abbreviations;
static std::
map<std::string, std::function<std::shared_ptr<QPDFStreamFilter>()>>
filter_factories;
void replaceFilterData(
QPDFObjectHandle const& filter,
QPDFObjectHandle const& decode_parms,
size_t length);
bool filterable(
std::vector<std::shared_ptr<QPDFStreamFilter>>& filters,
bool& specialized_compression,
bool& lossy_compression);
void warn(std::string const& message);
void setDictDescription();
bool filter_on_write;
QPDFObjectHandle stream_dict;
size_t length;
std::shared_ptr<Buffer> stream_data;
std::shared_ptr<QPDFObjectHandle::StreamDataProvider> stream_provider;
std::vector<std::shared_ptr<QPDFObjectHandle::TokenFilter>> token_filters;
};
#endif // QPDF_STREAM_HH