bug#27357: 26.0.50; Emacs starts fullscreen in Ubuntu 17.04

[Lars Ingebrigtsen <larsi@gnus.org>]

Jan, I think you were the one that added the GDK_SCALE thing to Emacs?
I've been chasing down some HiDPI issues:

Lars Ingebrigtsen <larsi@gnus.org> writes:

> That might be a good idea, but I'm not sure where the previous people
> who were working on scaling were going with their work.
>
> Amusingly enough, the 
>
>       int scale = xg_get_gdk_scale ();
>
> stuff that's sprinkled around just seems to get in the way of fixing
> this stuff.  It explicitly looks at the GDK_SCALE environment variable,
> which is (by default) not set.  So while some bits of Emacs is using
> that variable to determine some things, querying GTK in the proper way
> (with gtk_widget_get_scale_factor) will get another answer.

Is there a drawback to looking at gtk_widget_get_scale_factor instead of
the GDK_SCALE variable?

Reworking this (on the scratch/hidpi branch) to not look at that
variable seems to fix all my HiDPI issues.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no