$my_os = "$^O";
if ($my_os eq "linux") {
   $font_file   = "/usr/share/fonts/default/TTF/DejaVuSans.ttf"; 
   
} elsif ($my_os eq "MSWin32") {
   $dir_marker = "\\";
#   $font_file   = $ENV{"SystemRoot"} . $dir_marker . "Fonts" . $dir_marker . "Arial.ttf";

   $font_file = "c\\:\\\\windows\\\\fonts\\\\verdana.ttf";
  
}