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https://github.com/qpdf/qpdf.git
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116 lines
3.0 KiB
C++
116 lines
3.0 KiB
C++
#include <iostream>
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#include <string.h>
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#include <stdlib.h>
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#include <qpdf/QPDF.hh>
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#include <qpdf/QUtil.hh>
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#include <qpdf/Buffer.hh>
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#include <qpdf/QPDFWriter.hh>
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static char const* whoami = 0;
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void usage()
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{
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std::cerr << "Usage: " << whoami << " infile.pdf outfile.pdf [in-password]"
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<< std::endl
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<< "Double size of all pages in infile.pdf;"
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<< " write output to outfile.pdf" << std::endl;
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exit(2);
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}
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static void doubleBoxSize(QPDFObjectHandle& page, char const* box_name)
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{
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// If there is a box of this name, replace it with a new box whose
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// elements are double the values of the original box.
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QPDFObjectHandle box = page.getKey(box_name);
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if (box.isNull())
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{
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return;
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}
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if (! (box.isArray() && (box.getArrayNItems() == 4)))
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{
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throw std::runtime_error(std::string("box ") + box_name +
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" is not an array of four elements");
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}
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std::vector<QPDFObjectHandle> doubled;
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for (unsigned int i = 0; i < 4; ++i)
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{
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doubled.push_back(
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QPDFObjectHandle::newReal(
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QUtil::double_to_string(
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box.getArrayItem(i).getNumericValue() * 2.0, 2)));
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}
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page.replaceKey(box_name, QPDFObjectHandle::newArray(doubled));
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}
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int main(int argc, char* argv[])
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{
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whoami = QUtil::getWhoami(argv[0]);
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// For libtool's sake....
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if (strncmp(whoami, "lt-", 3) == 0)
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{
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whoami += 3;
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}
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if (! ((argc == 3) || (argc == 4)))
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{
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usage();
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}
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char const* infilename = argv[1];
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char const* outfilename = argv[2];
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char const* password = (argc == 4) ? argv[3] : "";
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// Text to prepend to each page's contents
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char const* content = "2 0 0 2 0 0 cm\n";
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// Copy text into a buffer without the null terminator
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PointerHolder<Buffer> b = new Buffer(strlen(content));
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unsigned char* bp = b->getBuffer();
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memcpy(bp, (unsigned char*)content, strlen(content));
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try
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{
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QPDF qpdf;
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qpdf.processFile(infilename, password);
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std::vector<QPDFObjectHandle> pages = qpdf.getAllPages();
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for (std::vector<QPDFObjectHandle>::iterator iter = pages.begin();
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iter != pages.end(); ++iter)
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{
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QPDFObjectHandle& page = *iter;
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// Prepend the buffer to the page's contents
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page.addPageContents(QPDFObjectHandle::newStream(&qpdf, b), true);
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// Double the size of each of the content boxes
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doubleBoxSize(page, "/MediaBox");
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doubleBoxSize(page, "/CropBox");
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doubleBoxSize(page, "/BleedBox");
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doubleBoxSize(page, "/TrimBox");
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doubleBoxSize(page, "/ArtBox");
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}
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// Write out a new file
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QPDFWriter w(qpdf, outfilename);
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if (QUtil::get_env("IN_TESTSUITE"))
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{
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// For the test suite, uncompress streams and use static
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// IDs.
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w.setStaticID(true);
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w.setStreamDataMode(qpdf_s_uncompress);
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}
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w.write();
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std::cout << whoami << ": new file written to " << outfilename
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<< std::endl;
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}
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catch (std::exception &e)
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{
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std::cerr << whoami << " processing file " << infilename << ": "
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<< e.what() << std::endl;
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exit(2);
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}
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return 0;
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}
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