Comments (2)
as long as you understand that font weights are not CSS font weights, you can query the OS/2 table for usWeightClass
(https://www.microsoft.com/typography/otspec/os2.htm#wtc). Note that in OpenType-land this is not the same as the font style classification: you can have a normal font with weight 999 or a bold font with weight 1. There is no specification-defined relation between the two. The subfamily string for the font (regular, italic, bold, bold italic) can be found in the name table, as name record id 2 (if supplied in the font. It might be missing). There is also the OS/2 table's fsSelection value that overlaps with that, https://www.microsoft.com/typography/otspec/os2.htm#fst.
Finally, to tell if a font is monospaced, you can check the bProportion
bit in the Panose classification (https://www.microsoft.com/typography/otspec/os2.htm#pan) but this is not super reliable. You can also check the "post" table for the isFixedPitch
value (https://www.microsoft.com/typography/otspec/post.htm). And finally, you can check the "hmtx" table (https://www.microsoft.com/typography/otspec/hmtx.htm) because if your font is truly monospaced, there is only one horizontal metric value instead of a large number of different widths for (ranges of) glyph(s).
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Thanks a bunch, Pomax. Much appreciated.
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