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Script and Language Support
Several glyph effects have been included in fonts to support the
use of non-European scripts. While these effects typically apply
to one or more non-European scripts, they can sometimes be used
in European scripts for visual effect.
Vertical Substitution
The Vertical Substitution feature type can be used to specify
that glyphs need to change their appearance in vertical runs of
text. This might be automatically triggered in an application
that supports vertical text.
It's most useful for Kanji and other scripts which can be written
vertically, but it can also be very handy when scripts typically
written horizontally are written vertically, either for display,
or within a vertically-written script (eg. an English word within
some vertically-set Kanji).
The Vertical Substitution feature has one setting, which can be
on or off.
Substitute Vertical Forms
Example
- Glyphs:
- Horizontal forms; Vertical forms.
- Effect:
- Horizontally-oriented glyphs (such as brackets) are replaced with
vertically-oriented versions.
- Editor:
- 1-for-1 non-contextual editor.
Character Shape
The Character Shape feature type is primarily for use with Chinese
fonts to specify the use of the Traditional or Simplified character
forms. This is not done as a Glyph Alternate setting because the
difference between Traditional and Simplified characters is a
well-defined linguistic, rather than stylistic, feature of Chinese.
This is an exclusive feature.
Traditional Characters
Examples
- Glyphs:
- Traditonal Chinese characters.
- Effect:
- Forces GX to display Chinese text using traditional character
forms.
- Editor:
- 1-for-1 non-contextual editor
Simplified Characters
Examples
- Glyphs:
- Simplified Chinese characters.
- Effect:
- Forces GX to display Chinese text using simplified character forms.
- Editor:
- 1-for-1 non-contextual editor.
Diacritics
The Diacritics feature type allows control over how diacritics
(i.e. accent marks or applied vowels) appear in text. This is
useful in Arabic children's book text, where the same text could
be shown with vowels for children (inexperienced readers) and
without vowels for adults.
This effect does not affect what you type (eg., opt-n + n = ñ).
That behavior is part of the keyboard, and neither the font nor
GX itself know anything about it.
This is an exclusive feature.
Show Diacritics
Examples
- Glyphs:
-
- Effect:
-
- Editor:
-
- Notes:
- This setting will be the default in most fonts.
Hide Diacritics
Example
- Glyphs:
-
- Effect:
-
- Editor:
-
- Notes:
- The Hide Diacritics selector means to not show the marks.
Decompose Diacritics
Example
- Glyphs:
- None
- Effect:
- Diacritic marks are not attached to characters, instead they are
placed in-line with the rest of the text.
- Editor:
 Because of a TrueEdit bug, there is no editor for this feature.
-
Linguistic Rearrangement
The Linguistic Rearrangement feature type specifies whether linguistic
rearrangement of glyphs (such as happens in South Asian scripts)
should happen. It is on by default for fonts representing these
scripts.
Linguistic Rearrangement
- Glyphs:
- As appropriate
- Effect:
- As appropriate
- Editor:
- Not implemented.
- Notes:
- The default is 'enabled' for fonts representing the relevant scripts.
The Apple Fonts Group (applefonts@apple.com)
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