Re: Introducing emacs-webkit and more thoughts on Emacs rendering (was Rethinking the design of xwidgets)

[Eli Zaretskii]

> From: Tomas Hlavaty <tom@logand.com>
> Date: Thu, 03 Dec 2020 09:15:16 +0100
> Cc: emacs-devel@gnu.org
> 
> > It seems like unless you're going to teach Emacs to entirely draw
> > itself to the framebuffer, there will always be glitches like the
> > cursor messing up images since TUI Emacs won't be aware of what pixels
> > of the framebuffer have been drawn over independently of the linux VT
> > displaying lines of Emacs' characters.
> 
> The cursor could be turned off.
> 
> Are there other glitches which cannot be solved?

Even turning the cursor off doesn't guarantee that Emacs will not
trigger overwriting of the images.  For example, sometimes Emacs moves
the cursor by writing newline characters, which could potentially
overwrite the image if the console implements that by writing spaces
or clearing each line to EOL.