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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Emacs canvas support
Date: Thu, 30 Apr 2020 16:55:05 +0300
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Cc: tomas@tuxteam.de, monnier@iro.umontreal.ca, emacs-devel@gnu.org
To: Po Lu <luangruo@yahoo.com>
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> From: Po Lu <luangruo@yahoo.com>
> Cc: tomas@tuxteam.de,  Eli Zaretskii <eliz@gnu.org>,  emacs-devel@gnu.org
> Date: Thu, 30 Apr 2020 16:04:38 +0800
> 
> Stefan Monnier <monnier@iro.umontreal.ca> writes:
> 
> That's what I'm trying to do right now, but so far keeping track of
> exactly where each canvas is displayed on the screen seems to be
> difficult.  I'd appreciate some suggestions, thanks.

I think the information needs to be recorded in the glyph structure
that represents a canvas.