mirror of
https://github.com/qpdf/qpdf.git
synced 2024-12-22 19:08:59 +00:00
117 lines
3.6 KiB
C++
117 lines
3.6 KiB
C++
#include <iostream>
|
|
#include <string.h>
|
|
#include <stdlib.h>
|
|
#include <qpdf/QPDF.hh>
|
|
#include <qpdf/QPDFPageDocumentHelper.hh>
|
|
#include <qpdf/QPDFPageObjectHelper.hh>
|
|
#include <qpdf/QPDFWriter.hh>
|
|
#include <qpdf/QUtil.hh>
|
|
|
|
// This program demonstrates use of form XObjects to overlay a page
|
|
// from one file onto all pages of another file. The qpdf program's
|
|
// --overlay and --underlay options provide a more general version of
|
|
// this capability.
|
|
|
|
static char const* whoami = 0;
|
|
|
|
void usage()
|
|
{
|
|
std::cerr << "Usage: " << whoami << " infile pagefile outfile"
|
|
<< std::endl
|
|
<< "Stamp page 1 of pagefile on every page of infile,"
|
|
<< " writing to outfile"
|
|
<< std::endl;
|
|
exit(2);
|
|
}
|
|
|
|
static void stamp_page(char const* infile,
|
|
char const* stampfile,
|
|
char const* outfile)
|
|
{
|
|
QPDF inpdf;
|
|
inpdf.processFile(infile);
|
|
QPDF stamppdf;
|
|
stamppdf.processFile(stampfile);
|
|
|
|
// Get first page from other file
|
|
QPDFPageObjectHelper stamp_page_1 =
|
|
QPDFPageDocumentHelper(stamppdf).getAllPages().at(0);
|
|
// Convert page to a form XObject
|
|
QPDFObjectHandle foreign_fo = stamp_page_1.getFormXObjectForPage();
|
|
// Copy form XObject to the input file
|
|
QPDFObjectHandle stamp_fo = inpdf.copyForeignObject(foreign_fo);
|
|
|
|
// For each page...
|
|
std::vector<QPDFPageObjectHelper> pages =
|
|
QPDFPageDocumentHelper(inpdf).getAllPages();
|
|
for (std::vector<QPDFPageObjectHelper>::iterator iter = pages.begin();
|
|
iter != pages.end(); ++iter)
|
|
{
|
|
QPDFPageObjectHelper& ph = *iter;
|
|
|
|
// Find a unique resource name for the new form XObject
|
|
QPDFObjectHandle resources = ph.getAttribute("/Resources", true);
|
|
int min_suffix = 1;
|
|
std::string name = resources.getUniqueResourceName("/Fx", min_suffix);
|
|
|
|
// Generate content to place the form XObject centered within
|
|
// destination page's trim box.
|
|
QPDFMatrix m;
|
|
std::string content =
|
|
ph.placeFormXObject(
|
|
stamp_fo, name, ph.getTrimBox().getArrayAsRectangle(), m);
|
|
if (! content.empty())
|
|
{
|
|
// Append the content to the page's content. Surround the
|
|
// original content with q...Q to the new content from the
|
|
// page's original content.
|
|
resources.mergeResources(
|
|
QPDFObjectHandle::parse("<< /XObject << >> >>"));
|
|
resources.getKey("/XObject").replaceKey(name, stamp_fo);
|
|
ph.addPageContents(
|
|
QPDFObjectHandle::newStream(&inpdf, "q\n"), true);
|
|
ph.addPageContents(
|
|
QPDFObjectHandle::newStream(&inpdf, "\nQ\n" + content), false);
|
|
}
|
|
// Copy the annotations and form fields from the original page
|
|
// to the new page. For more efficiency when copying multiple
|
|
// pages, we can create a QPDFAcroFormDocumentHelper and pass
|
|
// it in. See comments in QPDFPageObjectHelper.hh for details.
|
|
ph.copyAnnotations(stamp_page_1, m);
|
|
}
|
|
|
|
QPDFWriter w(inpdf, outfile);
|
|
w.setStaticID(true); // for testing only
|
|
w.write();
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
whoami = QUtil::getWhoami(argv[0]);
|
|
|
|
// For libtool's sake....
|
|
if (strncmp(whoami, "lt-", 3) == 0)
|
|
{
|
|
whoami += 3;
|
|
}
|
|
|
|
if (argc != 4)
|
|
{
|
|
usage();
|
|
}
|
|
char const* infile = argv[1];
|
|
char const* stampfile = argv[2];
|
|
char const* outfile = argv[3];
|
|
|
|
try
|
|
{
|
|
stamp_page(infile, stampfile, outfile);
|
|
}
|
|
catch (std::exception &e)
|
|
{
|
|
std::cerr << whoami << ": " << e.what() << std::endl;
|
|
exit(2);
|
|
}
|
|
return 0;
|
|
}
|