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Subject: Re: Redisplay bug, efs invalid-function bug
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From: David Moore <dmoore@ucsd.edu>
Date: 22 Mar 1997 08:20:58 -0800
In-Reply-To: "Karl M. Hegbloom"'s message of Sat, 22 Mar 1997 05:19:38 -0800
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"Karl M. Hegbloom" <karlheg@inetarena.com> writes:

>  I tried 'efs', and it goes blonk, "(invalid-function (macro
> . #<compiled-function (from "advice.elc"...", so I set
> 'debug-on-error' and did it, and noticed that when I scroll the
> debugger window, the tops of accented characters are left behind.  Off
> by one?

[ photo of leaving the tops of accented characters behind ]

Yes, this is a known problem.  It's because the tops of those characters
lie outside of the "bounding box" that the font claims to live in.
XEmacs (and emacs) just erase within that space.  The only way to
otherwise fix it is to either wipe the whole screen or to draw the old
character in inverse to erase it.  Neither of these sound very good to
me. :) I guess you could expand the bounding box size, but then you'll
be doing a lot more redisplay on fonts which are friendly.


-- 
David Moore <dmoore@ucsd.edu>       | Computer Systems Lab      __o
UCSD Dept. Computer Science - 0114  | Work: (619) 534-8604    _ \<,_
La Jolla, CA 92093-0114             | Fax:  (619) 534-1445   (_)/ (_)
<URL:http://oj.egbt.org/dmoore/>    | In a cloud bones of steel.

