Use

 ./code128-font --fontsize 12pt > code128-12.svg

to produce an svg font. By default, it maps some printable unicode characters
to the code 128 control chars, so codes can be printed from text-processing
tools. 

Note that the font always uses the minimum allowed width, but the height of 
the font is the value given for the fontsize. To get a wider code, just use
the font for a given size with a higher size. Eg. a 12pt font at size 24.

svg2ttf might be used to convert the SVG font to a truetype font.

To produce the characters to print for a any given data, use

 ./code128 <data>