[XeTeX] detection of absent characters within a font

[Adam Lindsay]

Jonathan Kew said this at Thu, 11 Nov 2004 10:26:28 -0500:

>Adam, the answer is currently "no", but this may change. (In some 
>cases, you might get width=0, but that depends on what the font 
>designer provides for ".notdef"; in many TrueType fonts, at least, 
>unsupported characters map to an "empty box" glyph.)

Thanks for the definitive answer... I just got there empirically. :/

Consider it a request, then, please?
(Given this mechanism plus your fontavailability macros, I probably won't
bug you any further about generic font fallbacks!)

cheers,
adam
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 Adam T. Lindsay, Computing Dept.     atl at comp.lancs.ac.uk
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