features.fea

languagesystem DFLT dflt;

# single substitution: stylistic alternates
feature salt {
    substitute a by a.alt;
    substitute g by g.alt;
} salt;

# ligature substitution
feature liga {
    sub f f i by f_f_i;
    sub f f l by f_f_l;
    sub f i by f_i;
    sub f l by f_l;
} liga;


# glyph classes for numerators, denominators, fractions
@digits = [zero one two three four five six seven eight nine];
@numerators = [zero.numr one.numr two.numr three.numr four.numr five.numr six.numr seven.numr eight.numr nine.numr];
@denominators = [zero.dnom one.dnom two.dnom three.dnom four.dnom five.dnom six.dnom seven.dnom eight.dnom nine.dnom];

feature numr {
    sub @digits by @numerators;
} numr;

feature dnom {
    sub @digits by @denominators;
} dnom;

feature frac {
    sub slash by fraction;
    sub @digits' fraction by @numerators;
    sub fraction @digits' by @denominators;
} frac;


# kerning: position feature
feature kern {
    position A V -40;
    position A Y -40;
    position L T -20;
    position T a -80;
    position T o -80;
    position g j 40;
    # VERY incomplete!
} kern;