[XeTeX] Detect, whether a font contains a certain character

[Andrew Moschou]

2011/11/28 Zdenek Wagner <zdenek.wagner at gmail.com>

> Put it into an \hbox and measure its width (\wd). If the width is
> zero, the glyph does not exist.
>

If the required glyph doesn't exist, wouldn't this measure the ".notdef"
glyph?

Andrew
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