Method save_screenshot

src/laybasic/laybasic/layLayoutViewBase.cc:3009–3028

#if defined(HAVE_QT) && !defined(PREFER_LIBPNG_FOR_SAVE)
void
LayoutViewBase::save_screenshot (const std::string &fn)
{
  tl::SelfTimer timer (tl::verbosity () >= 11, tl::to_string (tr ("Save screenshot")));

  QImageWriter writer (tl::to_qstring (fn), QByteArray ("PNG"));

  std::vector<std::pair<std::string, std::string> > texts = png_texts (this, box ());
  for (auto i = texts.begin (); i != texts.end (); ++i) {
    writer.setText (tl::to_qstring (i->first), tl::to_qstring (i->second));
  }

  refresh ();

  if (! writer.write (mp_canvas->screenshot ().to_image ())) {
    throw tl::Exception (tl::to_string (tr ("Unable to write screenshot to file: %s (%s)")), fn, tl::to_string (writer.errorString ()));
  }

  tl::log << "Saved screen shot to " << fn;
}
#elif defined(HAVE_PNG)
void
LayoutViewBase::save_screenshot (const std::string &fn)