The history of luaTEX 2006–2009 / v 0.50 - Pragma ADE

feature mark, lookup ml_arab_l_16_s, anchor Anchor-3, index 2, bound 1
anchoring mark U+F0173 (uni06510670) to baselig U+F03E5
(uni064406440647.isol) at index 2 => (875520,-61440)
feature mark, lookup ml_arab_l_16_s, anchor Anchor-4, index 3, bound 1
anchoring mark U+0650 (uni0650) to baselig U+F03E5
(uni064406440647.isol) at index 3 => (261120,522240)
8: [+TRT] هلل:‏U+F03E5‎ U+650:ِ U+F0173: U+650:ِ [-TRT]
ِ ‏ِهلل
Another arabic example (after all, fonts that support arabic have lots of nice features) is
the following. First we dene a bunch of feature collections
\definefontfeature
[salt-n]
[analyze=yes,mode=node,
language=dflt,script=arab,
init=yes,medi=yes,fina=yes,isol=yes,
liga=yes,calt=yes,ccmp=yes,
kern=yes,curs=yes,mark=yes,mkmk=yes]
\definefontfeature[salt-y][salt-n][salt=yes]
\definefontfeature[salt-1][salt-n][salt=1]
\definefontfeature[salt-2][salt-n][salt=2]
\definefontfeature[salt-3][salt-n][salt=3]
\definefontfeature[salt-r][salt-n][salt=random]
Next we show a few traced examples. Watch the reported alternatives.
\showotfcomposition{scheherazaderegot*salt-n at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-y at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-1 at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-2 at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-3 at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-r at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-r at 36pt}{-1}{\char"6DD}
\showotfcomposition{scheherazaderegot*salt-r at 36pt}{-1}{\char"6DD}
Tracking 259