From: Eli Zaretskii <eliz@gnu.org>
To: Po Lu <luangruo@yahoo.com>
Cc: emacs-devel@gnu.org
Subject: Re: Stipples and scroll optimizations
Date: Sun, 08 May 2022 10:30:11 +0300 [thread overview]
Message-ID: <83ilqgwkfw.fsf@gnu.org> (raw)
In-Reply-To: <87a6bs5w05.fsf@yahoo.com> (message from Po Lu on Sun, 08 May 2022 15:22:34 +0800)
> From: Po Lu <luangruo@yahoo.com>
> Date: Sun, 08 May 2022 15:22:34 +0800
>
> When a glyph with a stipple background is displayed in the scrolled area
> of the screen, the optimization in `scrolling_window' should not be
> performed. This is because stipples are "tiled" across the screen from
> a constant origin, so the display of the stipple might not be correct
> after it is copied to a different part of the frame.
>
> That problem can easily be seen by setting the stipple of the default
> face to `dimple1' and scrolling a little.
>
> WDYT about such a change?
If using scrolling_window in this case causes incorrect display, then
scrolling_window should be disabled. But how would you know, in
update_window or its subroutines, that this is the case?
next prev parent reply other threads:[~2022-05-08 7:30 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <87a6bs5w05.fsf.ref@yahoo.com>
2022-05-08 7:22 ` Stipples and scroll optimizations Po Lu
2022-05-08 7:30 ` Eli Zaretskii [this message]
2022-05-08 7:34 ` Po Lu
2022-05-08 7:40 ` Eli Zaretskii
2022-05-08 7:58 ` Po Lu
2022-05-08 9:06 ` Eli Zaretskii
2022-05-08 9:20 ` Po Lu
2022-05-08 10:46 ` Eli Zaretskii
2022-05-08 10:59 ` Po Lu
2022-05-08 11:29 ` Eli Zaretskii
2022-05-08 11:46 ` Po Lu
2022-05-08 11:07 ` Po Lu
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