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cb769c62e5
This comment expands all tabs using an 8-character tab-width. You should ignore this commit when using git blame or use git blame -w. In the early days, I used to use tabs where possible for indentation, since emacs did this automatically. In recent years, I have switched to only using spaces, which means qpdf source code has been a mixture of spaces and tabs. I have avoided cleaning this up because of not wanting gratuitous whitespaces change to cloud the output of git blame, but I changed my mind after discussing with users who view qpdf source code in editors/IDEs that have other tab widths by default and in light of the fact that I am planning to start applying automatic code formatting soon.
123 lines
2.7 KiB
C++
123 lines
2.7 KiB
C++
#include <qpdf/QPDFJob.hh>
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#include <qpdf/QUtil.hh>
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#include <qpdf/QIntC.hh>
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#include <iostream>
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#include <cstring>
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// This program is a simple demonstration of different ways to use the
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// QPDFJob API.
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static char const* whoami = 0;
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static void usage()
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{
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std::cerr
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<< "Usage: " << whoami << std::endl
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<< "This program linearizes the first page of in.pdf to out1.pdf,"
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<< " out2.pdf, and"
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<< std::endl
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<< " out3.pdf, each demonstrating a different way to use the"
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<< " QPDFJob API"
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<< std::endl;
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exit(2);
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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 != 1)
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{
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usage();
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}
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// The examples below all catch std::exception. Note that
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// QPDFUsage can be caught separately to report on errors in using
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// the API itself. For CLI, this is command-line usage. For JSON
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// or the API, it would be errors from the equivalent invocation.
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// Note that staticId is used for testing only.
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try
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{
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// Use the config API
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QPDFJob j;
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j.config()
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->inputFile("in.pdf")
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->outputFile("out1.pdf")
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->pages()
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->pageSpec(".", "1")
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->endPages()
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->linearize()
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->staticId() // for testing only
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->checkConfiguration();
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j.run();
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std::cout << "out1 status: " << j.getExitCode() << std::endl;
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}
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catch (std::exception& e)
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{
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std::cerr << "exception: " << e.what() << std::endl;
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return 2;
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}
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try
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{
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char const* new_argv[] = {
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whoami,
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"in.pdf",
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"out2.pdf",
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"--linearize",
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"--pages",
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".",
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"1",
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"--",
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"--static-id",
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nullptr
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};
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QPDFJob j;
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j.initializeFromArgv(new_argv);
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j.run();
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std::cout << "out2 status: " << j.getExitCode() << std::endl;
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}
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catch (std::exception& e)
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{
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std::cerr << "exception: " << e.what() << std::endl;
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return 2;
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}
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try
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{
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// Use the JSON API
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QPDFJob j;
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j.initializeFromJson(R"({
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"inputFile": "in.pdf",
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"outputFile": "out3.pdf",
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"staticId": "",
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"linearize": "",
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"pages": [
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{
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"file": ".",
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"range": "1"
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}
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]
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}
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)");
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j.run();
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std::cout << "out3 status: " << j.getExitCode() << std::endl;
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}
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catch (std::exception& e)
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{
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std::cerr << "exception: " << e.what() << std::endl;
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return 2;
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}
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return 0;
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}
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