What is the standardized way to quantify font weights in FreeType? FT seems to expose the style name via FT_Face, which provides a string-based descriptive name, but I'm encountering a number of styles that do not have a one-to-one match on the weight scale used by WinAPI (I'm not sure where the origin of the weight scale is from). For instance, "Narrow" does not seem to be a quantifiable descriptor. Nor does "Condensed". I presently have the following table, but it's incomplete (eg in addition to the two abovementioned styles it lacks things like "Semilight", etc):
Extra Light = 100
Ultra Light = 100
Light = 200
Thin = 200
Book = 300
Demi = 300
Normal = 400
Regular = 400
Medium = 500
Semibold = 600
Demibold = 600
Bold = 700
Black = 800
Extra Bold = 800
Heavy = 800
ExtraBlack = 900
Fat = 900
Poster = 900
Ultra Black = 900
In addition to this, the PostScript descriptor seems to have a weight member (though I cannot tell whether it uses the same scale as above) and there seems to be no entirely consistent way in which the literal style tokens are written in the first place ("Semi Light" != "Semilight"). Am I missing something obvious or is there some voodoo involved here?
