Text::PDF::SFont->new($parent, CW$name, CW$pdfname)
Creates a new font object with given parent and name. The name must be from
one of the core 14 base fonts included with PDF. These are:
Courier, Courier-Bold, Courier-Oblique, Courier-BoldOblique
Times-Roman, Times-Bold, Times-Italic, Times-BoldItalic
Helvetica, Helvetica-Bold, Helvetica-Oblique, Helvetica-BoldOblique
The $pdfname is the name that this particular font object will be referenced
by throughout the PDF file. If you want to play silly games with naming, then
you can write the code to do it!
All fonts in this system are full PDF objects.