+inkscape_export 'print-front';
+inkscape_export 'print-back';
+
+# export visible
+print $inkscape "$out.svg --export-png $out.png --export-dpi 300\n";
+
+close($inkscape);
+
+foreach my $pdf ( glob "$out*.pdf" ) {
+ my $pbm = $pdf;
+ $pbm =~ s/pdf$/pbm/;
+ warn "# rendering $pdf => $pbm using ghostscript\n";
+ system "gs -dNOPAUSE -dBATCH -q -r300x300 -dDEVICEWIDTHPOINTS=243 -dDEVICEHEIGHTPOINTS=155 -sDEVICE=pbmraw -sOutputFile=$pbm -f $pdf";
+}
+
+system "pdftk $out.print-front.pdf $out.print-back.pdf cat output $out.print-duplex.pdf";
+
+__END__