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Vertical Position Feature Type

The vertical position feature type (kVerticalPositionType) controls the selection of superscript and subscript glyph sets. Figure B-22 shows text drawn using normal, superior, inferior, and ordinal vertical positions.


Figure B-22  Normal, superior, inferior, and ordinal vertical positions

Normal, superior, inferior, and ordinal vertical positions

The vertical position feature type is a contextual, exclusive feature type. The selectors for this feature are described in Table B-28.

Table B-28  Selectors for the vertical position feature

Feature selector

Description

kNormalPositionSelector

Specifies to display the text with no vertical displacement. This is the default setting. See the first word in Figure B-22.

kSuperiorsSelector

Specifies use of superiors; changes any characters having superior forms in the font into those forms, used typically for superscripts. See the second word in Figure B-22.

kInferiorsSelector

Specifies use of inferiors; changes any characters having inferior forms in the font into those forms, used typically for subscripts. See the third word in Figure B-22.

kOrdinalsSelector

Specifies to contextually change certain letters into their superior forms. As shown in the fourth word in Figure B-22, the ordinals selector may not effect drawing.



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Last updated: 2007-07-10

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