GNU bug report logs - #11070
24.0.94; Large stippled images not displayed consistently

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Message #48 received at 11070 <at> debbugs.gnu.org (full text, mbox):

From: Lars Ingebrigtsen <larsi <at> gnus.org>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: darthandrus <at> gmail.com, rgm <at> gnu.org, 11070 <at> debbugs.gnu.org
Subject: Re: bug#11070: 24.0.94; Large stippled images not displayed
 consistently
Date: Sun, 29 Sep 2019 20:33:54 +0200

[Message part 1 (text/plain, inline)]

Eli Zaretskii <eliz <at> gnu.org> writes:

> Then some redisplay optimization is at work here.  If your build was
> configured with --enable-checking=glyphs, does the problem go away if
> you set _all_ of the following variable non-nil?
>
>   inhibit-try-cursor-movement
>   inhibit-try-window-id
>   inhibit-try-window-reusing

No, that doesn't change anything.

But I now see more clearly what's not being updated -- it copies all the
bits in the background on the line that's being moved.

Here's the display first:

[stip1.jpg (image/jpeg, inline)]

[Message part 3 (text/plain, inline)]

Then I hit RET before the first line.  The entire line moves down,
background stipples and all:

[stip2.jpg (image/jpeg, inline)]

[Message part 5 (text/plain, inline)]

And again:

[stip3.jpg (image/jpeg, inline)]

[Message part 7 (text/plain, inline)]

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no

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