shithub: plan9front

ref: 4d4b6a19de040a111cca42d518fe0d26c255ceec
dir: /sys/lib/troff/font/devutf/charlib/ob/

View raw version 
/build_ob {
    pop
    size 3 mul 16 div /rad exch def
    currentpoint
    newpath
    rad add exch rad add exch rad 0 360 arc
    stroke
} def