Hagen - Pragma ADE

60
Features
accumulate within a word.
1
3
2
6
5.2.4 Single substitution
Single substitutions are probably the most used ones. For instance, when you ask for
small caps, a lot of glyphs get replaced. When using oldstyle numerals only digits get
replaced but even then each glyph has to be checked. This can be demonstrated with
the Latin Modern fonts.
$123.45 $123.45
As you can see here, Latin Modern has an oldstyle dollar sign. If you don’t like that
one, you’re in troubles as it comes with the rest of the oldstyles. The only way out is to
apply the oldstyle numerals to digits only which involves more tagging than you might
be willing to add. So, whenever you choose a substitution, be aware that you have not
that much control over what gets substituted: it’s the font that drives it. Here are some
examples:
\definefontfeature[capsandold][smallcaps,oldstyle]
\showotfcomposition{dejavu-serif*capsandold at 24pt}{}{It's 2013!}
\showotfcomposition{cambria*capsandold at 24pt}{}{It's 2013!}
\showotfcomposition{lmroman10regular*capsandold at 24pt}{}{It's 2013!}
\showotfcomposition{texgyrepagellaregular*capsandold at 24pt}{}{It's 2013!}
font 61: DejaVuSerif.ttf @ 24.0pt
features analyze=yes, curs=yes, devanagari=yes, extrafeatures=yes,
kern=yes, liga=yes, mark=yes, mkmk=yes, mode=node, onum=yes,
script=dflt, smcp=yes, tlig=yes, trep=yes
step 1 It's 2013! U+49:I U+74:t U+27:' U+73:s [glue]
U+32:2 U+30:0 U+31:1 U+33:3 U+21:!
feature 'trep', lookup 'ctx_trep_1_1', replacing U+00027
(quotesingle) by single U+02019 (quoteright)