bug#19117: 25.0.50; emacs on x11 chooses different fonts for the same face sometimes

[Dmitry Antipov <dmantipov@yandex.ru>]

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On 12/20/2014 01:46 AM, Dima Kogan wrote:

> So in your case, if you ask Emacs for a size-11 -adobe-utopia-... font
> then does Emacs pick a scalable font for you? If so, I would expect
> things to not look very good, since you'll get a 17->11 scaling.

Hm...below are my results of running:

emacs -Q --font "-adobe-utopia-bold-i-normal--11-120-100-100-p-94-iso8859-1"

and

emacs -Q --font "-adobe-utopia-bold-i-normal--17-120-100-100-p-94-iso8859-1"

respectively. May be *-11-* is just too small to see glitches on my screen,
but I can't complain about ugly rendering.

> - Should the candidate font list stay consistent as Emacs runs?

IIUC yes, unless you install/remove new/existing fonts and
do 'xset +/-fp /path/to/new|old/fonts' as Emacs runs.

> - Should the candidate font list contain any scalable fonts?

I'll try to check.

> My suspicion is that there's some race condition here that is tickled by
> my window manager. I'm using notion, which is a niche WM, so this
> wouldn't be widely reported. But even so, it has been working fine for
> many years, only regressing 6 months ago or so.

If you suspect the WM-side tricks, try to investigate this issue under twm
as well.

Dmitry


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