[Bug 1569943] New: upgrading from Liberation 1 to 2 in a desktop session can affect rendering of text
5:53 a.m.
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
Bug ID: 1569943
Summary: upgrading from Liberation 1 to 2 in a desktop session
can affect rendering of text
Product: Fedora
Version: rawhide
Component: liberation-fonts
Assignee: psatpute(a)redhat.com
Reporter: petersen(a)redhat.com
QA Contact: extras-qa(a)fedoraproject.org
CC: alexl(a)redhat.com, fonts-bugs(a)lists.fedoraproject.org,
i18n-bugs(a)lists.fedoraproject.org,
john.j5live(a)gmail.com, mbarnes(a)fastmail.com,
mclasen(a)redhat.com, petersen(a)redhat.com,
psatpute(a)redhat.com, rhughes(a)redhat.com,
rstrode(a)redhat.com, sandmann(a)redhat.com
Description of problem:
The Liberation 1 and 2 fonts may be binary incompatible
in the sense that upgrading a live desktop from Liberation 1 to 2
seemed to corrupt some characters for me in Firefox (with Ariel text in
Google Docs for the default unordered list mark symbols).
Version-Release number of selected component (if applicable):
liberation-fonts-2.00.1
Actual results:
'·' -> '>'
'⃝' -> '<'
for example
Expected results:
Not change of glyphs.
Additional info:
I suspect this might be due to caching of the old font's tables in memory.
It would be better if the tables were more compatible I suppose.
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3:42 a.m.
New subject: [Bug 1569943]
upgrading from Liberation 1 to 2 in a desktop session can affect rendering
of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
--- Comment #1 from Jens Petersen <petersen(a)redhat.com> ---
This might be a issue with Firefox's fonts handling.
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4:45 a.m.
New subject: [Bug 1569943]
upgrading from Liberation 1 to 2 in a desktop session can affect rendering
of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
--- Comment #2 from Nicolas Mailhot <nicolas.mailhot(a)laposte.net> ---
Yes, that's not specific to liberation at all, that's old and well-known broken
fontconfig/harfbuzz integration in Firefox, it does not properly invalidate its
font cache when fonts are updated. You have to close it to force it to parse
the new font file metadata otherwise it seems to try reading glyphs as their
location in the old font file even though the new font file has them moved
somewhere else (with metadata that correctly indicates where this somewhere
else is).
The bug should be reassigned
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9:22 a.m.
New subject: [Bug 1569943]
upgrading from Liberation 1 to 2 in a desktop session can affect rendering
of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
--- Comment #3 from Pravin Satpute <psatpute(a)redhat.com> ---
Thanks Nicolas for confirming. Being a font developer i often face this issue,
specifically when FF is running and i update the font. For sometime all
rendering gets broken
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3:33 a.m.
New subject: [Bug 1569943]
upgrading from Liberation 1 to 2 in a desktop session can affect rendering
of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
Jens Petersen <petersen(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ajax(a)redhat.com,
| |pnemade(a)redhat.com,
| |tagoh(a)redhat.com
Component|liberation-fonts |fontconfig
Assignee|psatpute(a)redhat.com |tagoh(a)redhat.com
--- Comment #4 from Jens Petersen <petersen(a)redhat.com> ---
I wonder if it could not be FreeType?
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3:34 a.m.
New subject: [Bug 1569943]
upgrading font version in a desktop session can affect rendering of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
Jens Petersen <petersen(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|upgrading from Liberation 1 |upgrading font version in a
|to 2 in a desktop session |desktop session can affect
|can affect rendering of |rendering of text
|text |
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7:24 a.m.
New subject: [Bug 1569943]
upgrading font version in a desktop session can affect rendering of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
--- Comment #5 from Akira TAGOH <tagoh(a)redhat.com> ---
This isn't an issue in fontconfig even. this would rather be an application
issue or rendering library where deal with file handles of fonts. fontconfig
provides an API to let them know if fonts are being updated. they have a way to
know that (but there are no way to know which one was updated...)
If they don't reopen a font when updating, the behavior may depends how they
open it. that is likely to see such issue anyway.
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2:50 a.m.
New subject: [Bug 1569943]
upgrading font version in a desktop session can affect rendering of text
https://bugzilla.redhat.com/show_bug.cgi?id=1569943
Jens Petersen <petersen(a)redhat.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |0xalen(a)protonmail.com,
| |gecko-bugs-nobody@fedorapro
| |ject.org,
| |jhorak(a)redhat.com,
| |kengert(a)redhat.com,
| |pjasicek(a)redhat.com
Component|fontconfig |firefox
Assignee|tagoh(a)redhat.com |gecko-bugs-nobody@fedorapro
| |ject.org
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