mirror of https://github.com/qpdf/qpdf.git
110 lines
3.6 KiB
C++
110 lines
3.6 KiB
C++
#ifndef QPDF_STREAM_HH
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#define QPDF_STREAM_HH
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#include <qpdf/Types.h>
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#include <qpdf/QPDFObjectHandle.hh>
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#include <qpdf/QPDFStreamFilter.hh>
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#include <qpdf/QPDFValue.hh>
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#include <functional>
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#include <memory>
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class Pipeline;
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class QPDF;
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class QPDF_Stream: public QPDFValue
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{
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public:
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~QPDF_Stream() override = default;
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static std::shared_ptr<QPDFObject> create(
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QPDF*,
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QPDFObjGen const& og,
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QPDFObjectHandle stream_dict,
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qpdf_offset_t offset,
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size_t length);
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std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
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std::string unparse() override;
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void writeJSON(int json_version, JSON::Writer& p) override;
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void setDescription(
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QPDF*, std::shared_ptr<QPDFValue::Description>& description, qpdf_offset_t offset) override;
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void disconnect() override;
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QPDFObjectHandle getDict() const;
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bool isDataModified() const;
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void setFilterOnWrite(bool);
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bool getFilterOnWrite() const;
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// Methods to help QPDF copy foreign streams
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size_t getLength() const;
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std::shared_ptr<Buffer> getStreamDataBuffer() const;
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std::shared_ptr<QPDFObjectHandle::StreamDataProvider> getStreamDataProvider() const;
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// See comments in QPDFObjectHandle.hh for these methods.
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bool pipeStreamData(
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Pipeline*,
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bool* tried_filtering,
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int encode_flags,
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qpdf_stream_decode_level_e decode_level,
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bool suppress_warnings,
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bool will_retry);
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std::shared_ptr<Buffer> getStreamData(qpdf_stream_decode_level_e);
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std::shared_ptr<Buffer> getRawStreamData();
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void replaceStreamData(
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std::shared_ptr<Buffer> data,
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QPDFObjectHandle const& filter,
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QPDFObjectHandle const& decode_parms);
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void replaceStreamData(
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std::shared_ptr<QPDFObjectHandle::StreamDataProvider> provider,
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QPDFObjectHandle const& filter,
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QPDFObjectHandle const& decode_parms);
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void addTokenFilter(std::shared_ptr<QPDFObjectHandle::TokenFilter> token_filter);
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JSON getStreamJSON(
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int json_version,
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qpdf_json_stream_data_e json_data,
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qpdf_stream_decode_level_e decode_level,
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Pipeline* p,
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std::string const& data_filename);
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qpdf_stream_decode_level_e writeStreamJSON(
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int json_version,
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JSON::Writer& jw,
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qpdf_json_stream_data_e json_data,
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qpdf_stream_decode_level_e decode_level,
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Pipeline* p,
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std::string const& data_filename,
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bool no_data_key = false);
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void replaceDict(QPDFObjectHandle const& new_dict);
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static void registerStreamFilter(
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std::string const& filter_name, std::function<std::shared_ptr<QPDFStreamFilter>()> factory);
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private:
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QPDF_Stream(
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QPDF*,
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QPDFObjGen const& og,
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QPDFObjectHandle stream_dict,
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qpdf_offset_t offset,
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size_t length);
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static std::map<std::string, std::string> filter_abbreviations;
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static std::map<std::string, std::function<std::shared_ptr<QPDFStreamFilter>()>>
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filter_factories;
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void replaceFilterData(
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QPDFObjectHandle const& filter, QPDFObjectHandle const& decode_parms, size_t length);
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bool filterable(
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std::vector<std::shared_ptr<QPDFStreamFilter>>& filters,
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bool& specialized_compression,
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bool& lossy_compression);
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void warn(std::string const& message);
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void setDictDescription();
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bool filter_on_write;
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QPDFObjectHandle stream_dict;
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size_t length;
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std::shared_ptr<Buffer> stream_data;
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std::shared_ptr<QPDFObjectHandle::StreamDataProvider> stream_provider;
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std::vector<std::shared_ptr<QPDFObjectHandle::TokenFilter>> token_filters;
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};
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#endif // QPDF_STREAM_HH
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