OpenType features

Test of the OpenType feature tag "liga": standard ligatures

b+a → ba f+f → ff a+t+t → att

(April 2012: OK Chromium and Firefox. August 2012: KO Chromium!)

Test of the OpenType feature tag "calt": contextual alternates

ĵ+d → ĵd ë+v → ëv ĵ+a → ĵa ë+f → ëf

d+ś → dś h+ë → hë t+ś → tś s+ɳ → sɳ

e+f → ef f+d → fd e+f+d → efd

A+A+P+P+B+F+F+D → AAPPBFFD

(June 2011: OK Firefox, KO other browsers)

Test of the OpenType feature tag "rand": randomize

In the following cases:

b d p bdpbdp

b d p bdpbdp

glyphs should change randomly like this:

b   

Random substitution do not give the expected result. ☹

Tutorial

See this tutorial for the implementation of the contextual substitution feature in an otf font.