GNU bug report logs - #52042
29.0.50; [feature/pgtk] issue in moving a fullscreen emacs frame from a scale@1x display to a scale@2x display

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Message #26 received at 52042 <at> debbugs.gnu.org (full text, mbox):

From: Alan Third <alan <at> idiocy.org>
To: Yuuki Harano <masm+emacs <at> masm11.me>, moonsolo <at> gmail.com,
 52042 <at> debbugs.gnu.org
Subject: Re: bug#52042: 29.0.50; [feature/pgtk] issue in moving a fullscreen
 emacs frame from a scale <at> 1x display to a scale <at> 2x display
Date: Thu, 2 Dec 2021 22:12:48 +0000

On Thu, Dec 02, 2021 at 10:09:54PM +0000, Alan Third wrote:
> On Thu, Dec 02, 2021 at 12:08:56AM +0900, Yuuki Harano wrote:
> > Maybe, I need to recreate cairo_surface_t when monitor
> > is changed.  I looked for such a signal but nothing found.
> 
> On the NS port whenever we create the context for drawing to the
> bitmap we compare the dimensions/scaling. It's not ideal but it
> doesn't seem to cause any noticeable slowdown. Perhaps PGTK can do
> something similar?

But then, having said that, I've just remembered we also call
expose_frame when the scale changes. That may not be possible if
there's no signal to let you know.
-- 
Alan Third

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