Glyphs-Handbook-2013

The term ANSI refers to the
Windows 8-bit encoding
1252, which is described
at msdn.microsoft.com/
en-us/goglobal/cc305145
and covers mostly Western
European Latin characters.
200 Extra-light (Ultra-light)
300 Light
400 Normal (Regular)
500 Medium
600 Semi-bold (Demi-bold)
700 Bold
800 Extra-bold (Ultra-bold)
widthClass integer
Corresponds to the OpenType OS/2 table usWidthClass field.
‘Indicates a relative change from the normal aspect ratio
(width to height ratio) as specified by a font designer for the
glyphs in a font.
Although every character in a font may have a dierent
numeric aspect ratio, each character in a font of normal
width has a relative aspect ratio of one. When a new type
style is created of a dierent width class (either by a font
designer or by some automated means) the relative aspect
ratio of the characters in the new font is some percentage
greater or less than those same characters in the normal font
— it is this dierence that this parameter specifies.’
Some applications use this value to sort the subfamilies in
the font menu. Overrides the value set by the Weight pop-up
menu of the instance.
Value Description % of normal
1 Ultra-condensed 50
2 Extra-condensed 62.5
3 Condensed 75
4 Semi-condensed 87.5
5 Medium (normal) 100
6 Semi-expanded 112.5
7 Expanded 125
8 Extra-expanded 150
9 Ultra-expanded 200
winAscent non-negative integer Ascender value for Windows.
Corresponds to the OpenType OS/2 table usWinAscent field.
‘usWinAscent is computed as the yMax for all characters in
the Windows ANSI character set. usWinAscent is used to
compute the Windows font height and default line spacing.
For platform 3 encoding 0 fonts, it is the same as yMax.
Windows will clip the bitmap of any portion of a glyph that
Glyphs Handbook, May 2013 97