Credits
The idea came from seeing the programs uniprint by Gaspar Sinai and nsprint in action. The program uniprint comes with the unicode text editor yudit and is able to take a text file in any supported encoding and print it out using a unicode enabled font.
A good part of the postscript font generating routines was originally taken from yudit and changed to work with the freetype library.
I also found extremely useful the programs that come with the freetype library, specially ttfbanner from which I borrowed a couple of lines.