bug#59306: 29.0.50; Resurrected bug?

[Po Lu]

Dmitry Gutov <dgutov@yandex.ru> writes:

> Since this bug sounds similar or at least related to bug#58912, I
> probably should comment:
>
> Rebuilding from the latest master makes the scenario in bug#58912 much
> better, in that the font size is applied correctly at the end.
>
> It's still different from Emacs 28 in that the frame size goes through
> an extra transition at the end of loading. And sometimes through 1
> more (the last one the same as the -2nd one). So sometimes I end up
> with a window of 84x37, and sometimes (less frequently) 80x35. All
> according to window-height and window-width.
>
> Emacs 28 and an older build of master both end up at 80x35.
>
> But at least the font size and family are ok now.

I guess Cairo just refuses to tell us what the DPI it defaults to using
is, so Emacs always ends up having to redraw the fonts at startup.

Please give me a while to think up a solution.