title: Replace all font glyphs in a PDF by converting them to outline shapes
body: <p>I am looking for a way to <em>'outline'</em> all text/fonts in a PDF file, i.e. convert them to curves.</p>
  
  <p>I would prefer to do this without having to convert the PDF to PostScript and back.  Also, I would like to use free lightweight cross-platform tools that can be automated from the command line, such as Ghostscript or MuPDF.</p>