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https://github.com/qpdf/qpdf.git
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83 lines
2.0 KiB
C++
83 lines
2.0 KiB
C++
#include <cstdlib>
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#include <iostream>
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#include <qpdf/QIntC.hh>
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#include <qpdf/QPDF.hh>
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#include <qpdf/QPDFPageDocumentHelper.hh>
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#include <qpdf/QPDFPageObjectHelper.hh>
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#include <qpdf/QUtil.hh>
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static char const* whoami = nullptr;
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void
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usage()
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{
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std::cerr << "Usage: " << whoami << " filename page-number" << std::endl
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<< "Prints a dump of the objects in the content streams of the given page."
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<< std::endl
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<< "Pages are numbered from 1." << std::endl;
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exit(2);
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}
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class ParserCallbacks: public QPDFObjectHandle::ParserCallbacks
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{
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public:
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~ParserCallbacks() override = default;
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void contentSize(size_t) override;
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void handleObject(QPDFObjectHandle, size_t offset, size_t length) override;
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void handleEOF() override;
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};
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void
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ParserCallbacks::contentSize(size_t size)
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{
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std::cout << "content size: " << size << std::endl;
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}
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void
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ParserCallbacks::handleObject(QPDFObjectHandle obj, size_t offset, size_t length)
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{
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std::cout << obj.getTypeName() << ", offset=" << offset << ", length=" << length << ": ";
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if (obj.isInlineImage()) {
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std::cout << QUtil::hex_encode(obj.getInlineImageValue()) << std::endl;
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} else {
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std::cout << obj.unparse() << std::endl;
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}
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}
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void
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ParserCallbacks::handleEOF()
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{
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std::cout << "-EOF-" << std::endl;
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}
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int
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main(int argc, char* argv[])
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{
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whoami = QUtil::getWhoami(argv[0]);
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if (argc != 3) {
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usage();
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}
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char const* filename = argv[1];
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int pageno = QUtil::string_to_int(argv[2]);
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try {
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QPDF pdf;
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pdf.processFile(filename);
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std::vector<QPDFPageObjectHelper> pages = QPDFPageDocumentHelper(pdf).getAllPages();
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if ((pageno < 1) || (QIntC::to_size(pageno) > pages.size())) {
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usage();
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}
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QPDFPageObjectHelper& page = pages.at(QIntC::to_size(pageno - 1));
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ParserCallbacks cb;
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page.parseContents(&cb);
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} catch (std::exception& e) {
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std::cerr << whoami << ": " << 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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