pdf-double-page-size.cc
3.44 KB
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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
#include <iostream>
#include <string.h>
#include <stdlib.h>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFPageDocumentHelper.hh>
#include <qpdf/QPDFPageObjectHelper.hh>
#include <qpdf/QUtil.hh>
#include <qpdf/Buffer.hh>
#include <qpdf/QPDFWriter.hh>
static char const* whoami = 0;
void usage()
{
std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]"
<< std::endl
<< "Double size of all pages in infile.pdf;"
<< " write output to outfile.pdf" << std::endl;
exit(2);
}
static void doubleBoxSize(QPDFObjectHandle& page, char const* box_name)
{
// If there is a box of this name, replace it with a new box whose
// elements are double the values of the original box.
QPDFObjectHandle box = page.getKey(box_name);
if (box.isNull())
{
return;
}
if (! (box.isArray() && (box.getArrayNItems() == 4)))
{
throw std::runtime_error(std::string("box ") + box_name +
" is not an array of four elements");
}
std::vector<QPDFObjectHandle> doubled;
for (int i = 0; i < 4; ++i)
{
doubled.push_back(
QPDFObjectHandle::newReal(
box.getArrayItem(i).getNumericValue() * 2.0, 2));
}
page.replaceKey(box_name, QPDFObjectHandle::newArray(doubled));
}
int main(int argc, char* argv[])
{
whoami = QUtil::getWhoami(argv[0]);
// For libtool's sake....
if (strncmp(whoami, "lt-", 3) == 0)
{
whoami += 3;
}
// For test suite
bool static_id = false;
if ((argc > 1) && (strcmp(argv[1], " --static-id") == 0))
{
static_id = true;
--argc;
++argv;
}
if (! ((argc == 3) || (argc == 4)))
{
usage();
}
char const* infilename = argv[1];
char const* outfilename = argv[2];
char const* password = (argc == 4) ? argv[3] : "";
// Text to prepend to each page's contents
std::string content = "2 0 0 2 0 0 cm\n";
try
{
QPDF qpdf;
qpdf.processFile(infilename, password);
std::vector<QPDFPageObjectHelper> pages =
QPDFPageDocumentHelper(qpdf).getAllPages();
for (std::vector<QPDFPageObjectHelper>::iterator iter =
pages.begin();
iter != pages.end(); ++iter)
{
QPDFPageObjectHelper& ph(*iter);
QPDFObjectHandle page = ph.getObjectHandle();
// Prepend the buffer to the page's contents
ph.addPageContents(
QPDFObjectHandle::newStream(&qpdf, content), true);
// Double the size of each of the content boxes
doubleBoxSize(page, "/MediaBox");
doubleBoxSize(page, "/CropBox");
doubleBoxSize(page, "/BleedBox");
doubleBoxSize(page, "/TrimBox");
doubleBoxSize(page, "/ArtBox");
}
// Write out a new file
QPDFWriter w(qpdf, outfilename);
if (static_id)
{
// For the test suite, uncompress streams and use static
// IDs.
w.setStaticID(true); // for testing only
w.setStreamDataMode(qpdf_s_uncompress);
}
w.write();
std::cout << whoami << ": new file written to " << outfilename
<< std::endl;
}
catch (std::exception &e)
{
std::cerr << whoami << " processing file " << infilename << ": "
<< e.what() << std::endl;
exit(2);
}
return 0;
}