Method save_image

src/laybasic/laybasic/layLayoutViewBase.cc:3114–3134

#if defined(HAVE_QT) && !defined(PREFER_LIBPNG_FOR_SAVE)
void
LayoutViewBase::save_image (const std::string &fn, unsigned int width, unsigned int height)
{
  tl::SelfTimer timer (tl::verbosity () >= 11, tl::to_string (tr ("Save image")));

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

  lay::Viewport vp (width, height, mp_canvas->viewport ().target_box ());
  std::vector<std::pair<std::string, std::string> > texts = png_texts (this, vp.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->image (width, height).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 image to " << fn;
}
#elif defined(HAVE_PNG)
void
LayoutViewBase::save_image (const std::string &fn, unsigned int width, unsigned int height)