PDFlib 8 Windows COM/.NET Tutorial

Table 6.1 Supported OpenType features for Western typography (Table 6.7 lists OpenType features for CJK text)
keyword
name description
_none all features disabled Deactivate all OpenType features listed in Table 6.1 and Table 6.7.
afrc alternative fractions Replace figures separated by a slash with an alternative form.
c2pc
c2sc
petite capitals from
capitals
small capitals from
capitals
Turn capital characters into petite capitals.
Turn capital characters into small capitals.
case case-sensitive forms Shift various punctuation marks up to a position that works better with all-capital sequences
or sets of lining figures; also changes oldstyle figures to lining figures.
dlig
discretionary
ligatures
Replace a sequence of glyphs with a single glyph which is preferred for typographic purposes.
dnom denominators Replace figures which follow a slash with denominator figures.
frac fractions Replace figures separated by a slash with 'common' (diagonal) fractions.
hist historical forms Replace the default (current) forms with the historical alternates. Some letter forms were
in common use in the past, but appear anachronistic today.
hlig historical ligatures This feature replaces the default (current) ligatures with the historical alternates.
liga standard ligatures Replace a sequence of glyphs with a single glyph which is preferred for typographic purposes.
lnum lining figures Change figures from oldstyle to the default lining form.
locl localized forms Enable localized forms of glyphs to be substituted for default forms. This feature requires
the script and language options.
mgrk mathematical Greek Replace standard typographic forms of Greek glyphs with corresponding forms commonly
used in mathematical notation.
numr numerators Replace figures which precede a slash with numerator figures and replace the typographic
slash with the fraction slash.
onum oldstyle figures Change figures from the default lining style to oldstyle form.
ordn ordinals Replace default alphabetic glyphs with the corresponding ordinal forms for use after figures;
commonly also creates the Numero (U+2116) character.
ornm ornaments Replace the bullet character and ASCII characters with ornaments.
pcap petite capitals Turn lowercase characters into petite capitals, i.e. capital letters which are shorter than
regular small caps.
pnum proportional figures Replace monospaced (tabular) figures with figures which have proportional widths.
salt stylistic alternates Replace the default forms with stylistic alternates. These alternates don’t always fit into a
clear category like swash or historical.
sinf scientific inferiors Replace lining or oldstyle figures with inferior figures (smaller glyphs), primarily for chemical
or mathematical notation).
smcp small capitals Turn lowercase characters into small capitals.
ss01
...
ss20
stylistic set 1-20
In addition to, or instead of, stylistic alternatives of individual glyphs (see salt feature),
some fonts may contain sets of stylistic variant glyphs corresponding to portions of the
character set, e.g. multiple variants for lowercase letters in a Latin font.
158 Chapter 6: Text Output (Edition for COM, .NET, and REALbasic)