pub unsafe static kCTKernAttributeName: &'static CFStringAvailable on crate feature
CTStringAttributes only.Expand description
A kerning adjustment.
Value must be a CFNumberRef float. Default is standard kerning. The kerning attribute indicate how many points the following character should be shifted from its default offset as defined by the current character’s font in points; a positive kern indicates a shift farther along and a negative kern indicates a shift closer to the current character. If this attribute is not present, standard kerning will be used. If this attribute is set to 0.0, no kerning will be done at all.
See also Apple’s documentation