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Re: Height of Unicode chars is not right


From: Eli Zaretskii
Subject: Re: Height of Unicode chars is not right
Date: Tue, 22 Sep 2015 20:31:52 +0300

> From: Óscar Fuentes <ofv@wanadoo.es>
> Date: Tue, 22 Sep 2015 19:12:27 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> It is worth a try (Deja Vu Sans Mono covers a lot too), altough as
> >> mentioned on my previous message, Emacs sometimes uses another font when
> >> the default one encodes the Unicode char. On a discussion with an Emacs
> >> hacker long time ago he mentioned that maybe such font does not correcty
> >> report the chars it covers.
> >
> > Emacs doesn't open fonts it considers for a given character, to avoid
> > a long delay when many fonts are tried (opening a font is expensive).
> > Without opening a font, it is impossible to know with 100% certainty
> > whether a font that declares coverage of some range of characters
> > indeed includes a glyph for each character in that range.
> 
> On the case I mention above the problem migth consist on the font *not*
> declaring some ranges, then Emacs switching to another font for the
> characters on those ranges, right?

Yes.




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