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Bug 788688 - x11-libs/pango-1.48.4 letter spacing problem
Summary: x11-libs/pango-1.48.4 letter spacing problem
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: Current packages (show other bugs)
Hardware: All Linux
: Normal normal (vote)
Assignee: Gentoo Linux Gnome Desktop Team
Depends on:
Reported: 2021-05-07 06:55 UTC by Ognian Tenchev
Modified: 2023-02-20 19:12 UTC (History)
3 users (show)

See Also:
Package list:
Runtime testing required: ---

with pango-1.42.4-r2 (before.png,20.92 KB, image/png)
2021-05-07 06:55 UTC, Ognian Tenchev
with pango-1.48.4 (after.png,20.97 KB, image/png)
2021-05-07 06:56 UTC, Ognian Tenchev
Celluloid 0.2 gtk3 (gtk3.png,20.42 KB, image/png)
2021-05-07 07:38 UTC, Ognian Tenchev

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Description Ognian Tenchev 2021-05-07 06:55:03 UTC
Upgrading pango from 1.42.4-r2 to 1.48.4 make some letters squished into each other. 

See attached images - this is from pidgin which is still gtk2 and font is Tahoma 8 regular.

Reproducible: Always
Comment 1 Ognian Tenchev 2021-05-07 06:55:35 UTC
Created attachment 706452 [details]
with pango-1.42.4-r2
Comment 2 Ognian Tenchev 2021-05-07 06:56:00 UTC
Created attachment 706455 [details]
with pango-1.48.4
Comment 3 Ionen Wolkens gentoo-dev 2021-05-07 07:31:00 UTC
Is it a widespread issue or only with that application? Or only gtk2?
Comment 4 Ognian Tenchev 2021-05-07 07:37:46 UTC
it seems it affect GTK3 too. See next attachment which is from Celluloid 0.2 (gtk3)
Comment 5 Ognian Tenchev 2021-05-07 07:38:06 UTC
Created attachment 706467 [details]
Celluloid 0.2 gtk3
Comment 6 Ognian Tenchev 2021-05-09 17:15:48 UTC
Simply downgrade to pango-1.42.4-r2 fixed issue.

Any other version above have same issue. I tried:
All of these produce wrong letter spacing with both gtk2 and gtk3.
Comment 7 Niklāvs Koļesņikovs 2021-05-09 20:11:42 UTC
Without looking too deeply into this, very likely the same issue:
Comment 8 Matt Turner gentoo-dev 2023-02-20 18:46:28 UTC
Still a problem?
Comment 9 Ognian Tenchev 2023-02-20 19:12:04 UTC
Sure it is, but it will never be fixed from what I have read about pango/harfbuzz & etc about bitmap fonts or something like that. Solution is to abandon Tahoma & such fonts.