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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Does face support underline other than a straight line?
Date: Wed, 25 Jan 2012 02:13:21 -0500
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To: "Stephen J. Turnbull" <stephen@xemacs.org>
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> From: "Stephen J. Turnbull" <stephen@xemacs.org>
> Date: Wed, 25 Jan 2012 15:49:08 +0900
> Cc: Leo <sdl.web@gmail.com>, emacs-devel@gnu.org
> 
> Chong Yidong writes:
>  > Leo <sdl.web@gmail.com> writes:
>  > 
>  > > Hello,
>  > >
>  > > I found in other editors something like this:
>  > >
>  > > ie they support wave underline. I am curious whether emacs can do this
>  > > too?
>  > 
>  > I think implementing this would be a pain in the butt, since underlining
>  > is currently done with primitive X calls.
> 
> If Emacs supports background pixmaps to attach to faces, then it
> should be possible to create an appropriate pixmap on the fly.

We have the :stipple attribute of faces; is that what you mean?