Re: how to determine whether a char can be displayed or not

[Dave Love]

"Eli Zaretskii" <address@hidden> writes:

> This should return non-nil for an ASCII font on all systems.  Also,
> calling fontset-font unconditionally will signal an error on systems
> which don't support fontsets (e.g., MS-DOS); 

Shouldn't it just return nil, as on ttys?

> > - shouldn't this be implemented in C instead, reusing the existing
> >   font selection code, so as to be 100% sure of the answer ?

I'd think so.

> Is x-list-fonts slow?

It presumably can be, depending on what it's matching, if it works
like xlsfonts -- that can really thrash the X server.  It should
probably limit itself to s single match in this application; I missed
that.