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Re: Implementing child frames on terminal

From: Eli Zaretskii
Subject: Re: Implementing child frames on terminal
Date: Tue, 12 Jul 2022 16:48:51 +0300

> From: Po Lu <luangruo@yahoo.com>
> Cc: akib@disroot.org,  monnier@iro.umontreal.ca,  emacs-devel@gnu.org,
>   ibluefocus@outlook.com
> Date: Tue, 12 Jul 2022 21:38:23 +0800
> Eli Zaretskii <eliz@gnu.org> writes:
> > That'd be a step in the wrong direction, I think.  The whole idea of
> > TTY display is that glyphs written to the glyph rows of a window's
> > matrix "miraculously" end up in the frame's glyph matrix.  This avoids
> > a costly copying of glyphs by allocating the glyphs of windows from
> > the glyphs of the frame glyph matrix, and allows the last stage of
> > redisplay to optimize the writes of the entire frame, as opposed to
> > doing that window by window, which will surely be less optimal.
> >
> > I see no reason yet to abandon this trick.
> I think you're right.  I don't understand the frame-based redisplay very
> well, thanks.

Which part is difficult to understand?

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