GNU bug report logs - #46155
28.0.50; Regression: buffer contents flicker on macOS frames when

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From: Alan Third <alan <at> idiocy.org>
To: Aaron Jensen <aaronjensen <at> gmail.com>
Cc: 46155 <at> debbugs.gnu.org
Subject: bug#46155: 28.0.50; Regression: buffer contents flicker on macOS frames when
Date: Thu, 28 Jan 2021 16:39:49 +0000

On Thu, Jan 28, 2021 at 09:48:25AM -0600, Aaron Jensen wrote:
> From emacs -Q:
> 
> (dotimes (n 10)
>   (set-frame-parameter nil 'width (+ 80 n))
>   (sit-for 0.1))
> 
> This was previously fixed in bug#30699
> 
> I don't know if it was reverted at some point and I didn't notice, or it
> was started flickering again after Alan's recent (fantastic) performance
> improvements.
> 
> This reproduces on master (non-native-comp) as of ac102bb966 as well.

Apple deprecated the functions we were using to block screen drawing.

It's possible we can have a neater work-around now since we're drawing
to an offscreen buffer and therefore have greater control over what's
displayed. I'll have to look into it again.
-- 
Alan Third

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