From: Stefan Monnier <monnier@iro.umontreal.ca>
To: emacs-devel@gnu.org
Subject: Re: Cursor drawing
Date: Sat, 22 Dec 2018 11:43:31 -0500 [thread overview]
Message-ID: <jwvlg4hikh4.fsf-monnier+gmane.emacs.devel@gnu.org> (raw)
In-Reply-To: 83imzmboqc.fsf@gnu.org
> This kind of drawing cannot be part of the display engine, since you
> want to draw over the text, and thus redisplay will overwrite portions
> of your arrows.
That's why I was suggesting a separate layer.
> And probably also remove those at the beginning of each redisplay
> cycle, to avoid leaving artifacts on screen when/if redisplay decides
> to scroll.
Another way to look at it is that scrolling the display's pixels can
only be used when both layers (the glyph-matrix and the overlay) were
moved together.
Stefan
next prev parent reply other threads:[~2018-12-22 16:43 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-20 4:11 Process: Determining the origin of a command loop Keith David Bershatsky
2018-12-20 14:11 ` Eli Zaretskii
2018-12-20 15:39 ` Cursor drawing (was: Process: Determining the origin of a command loop) Stefan Monnier
2018-12-20 19:07 ` Cursor drawing Eli Zaretskii
2018-12-20 19:18 ` Stefan Monnier
2018-12-20 19:35 ` Eli Zaretskii
2018-12-20 19:58 ` Stefan Monnier
2018-12-21 4:03 ` Elias Mårtenson
2018-12-21 7:09 ` Eli Zaretskii
2018-12-21 16:36 ` Elias Mårtenson
2018-12-21 20:05 ` Eli Zaretskii
2018-12-21 20:27 ` Clément Pit-Claudel
2018-12-21 20:37 ` Eli Zaretskii
2018-12-21 20:41 ` Eli Zaretskii
2018-12-22 16:43 ` Stefan Monnier [this message]
2018-12-22 17:03 ` Eli Zaretskii
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