https://metacpan.org/release/Font-FreeType
http://search.cpan.org/~dmol/Font-FreeType-0.07/
https://metacpan.org/source/DMOL/Font-FreeType-0.07/examples/list-characters.pl
https://metacpan.org/source/DMOL/Font-FreeType-0.07/examples/render-glyph.pl
https://github.com/zmughal/p5-Font-FreeType/blob/master/examples/glyph-outline.pl
https://www.microsoft.com/typography/otspec/
https://www.microsoft.com/typography/otspec/glyf.htm
http://chanae.walon.org/pub/ttf/ttf_glyphs.htm
http://dejavu-fonts.org/wiki/Font_utilities
https://github.com/Distrotech/dejavu-fonts/tree/master/dejavu-fonts/scripts
http://mensis.sourceforge.net/overview.html#Overview
http://pfaedit.sourceforge.net/overview.html
http://search.cpan.org/~mhosken/Font-TTF-1.05/
http://search.cpan.org/~chm/OpenGL-0.6704/OpenGL.pod
http://cpansearch.perl.org/src/STANM/OpenGL-0.3/TUTORIAL
http://www.perlmonks.org/?node_id=776984