Manipulating Font Variations

ATSUI provides the following functions for manipulating font variations in a style object:

ATSUSetVariations sets font variations in a style object.
ATSUGetFontVariationValue obtains the font variation value of a font variation axis.
ATSUGetAllFontVariations obtains font variation information from a style object.
ATSUClearFontVariations removes previously set font variations from a style object.