1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
#ifndef QPDF_STREAM_HH
#define QPDF_STREAM_HH
#include <qpdf/Types.h>
#include <qpdf/QPDFObject.hh>
#include <qpdf/QPDFObjectHandle.hh>
#include <qpdf/QPDFStreamFilter.hh>
#include <functional>
#include <memory>
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;
void setFilterOnWrite(bool);
bool getFilterOnWrite() const;
// Methods to help QPDF copy foreign streams
qpdf_offset_t getOffset() const;
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);
void replaceDict(QPDFObjectHandle new_dict);
static void registerStreamFilter(
std::string const& filter_name,
std::function<std::shared_ptr<QPDFStreamFilter>()> factory);
// 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;
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(QPDFExc const& e);
void setDictDescription();
void setStreamDescription();
QPDF* qpdf;
int objid;
int generation;
bool filter_on_write;
QPDFObjectHandle stream_dict;
qpdf_offset_t offset;
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
|
