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

From: Dmitry Antipov
Subject: bug#19117: 25.0.50; emacs on x11 chooses different fonts for the same face sometimes
Date: Mon, 22 Dec 2014 11:01:53 +0300
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.3.0

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"


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.


Attachment: emacs-adobe-11.png
Description: PNG image

Attachment: emacs-adobe-17.png
Description: PNG image

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