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Message #48423
[Bug 1379375] Re: evince does not display ligatures
The patch seemed to work for me on utopic, so I uploaded a stable
update. Please check once you get a call for testing via this bug.
** Description changed:
- While there's Bug #1325230 with the same title and the linked PDFs there are working fine here (displaying "fi" correctly) there seems to be still some bug regarding ligatures.
+ [ Description ]
+
+ Some ligatures (e.g. "fi") are not displayed in certain fonts, because
+ there are two different naming schemes in use in the wild.
+
+ [ Fix ]
+
+ Poppler upstream fixed this by adding a lookup table to fall back to the
+ second scheme if necessary.
+
+ [ QA ]
+
+ 1. Install tex-gyre
+ 2. Download https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1317599/+attachment/4213588/+files/rfa1415_15sep_lect1.pdf
+ 3. Open the file in evince
+ 4. Look at "Biometrics: file" on page 3
+
+ If the "fi" ligature in "file" is not displayed, you have this bug.
+ "file" should be displayed normally after it's fixed.
+
+ [ Regression potential ]
+
+ Since this patch implements a fallback only when lookup false, there
+ shouldn't be any problems. Still, check all existing PDFs are still
+ displayed correctly.
+
+ [ Original report ]
+
+ While there's Bug #1325230 with the same title and the linked PDFs there are working fine here (displaying "fi" correctly) there seems to be still some bug regarding ligatures.
https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1325230
I have some PDFs substituting Helvetica (and others) with TeX Gyre Heros
and showing no "fi" ligature. I attached a patch I derived from the
patch in Bug #1325230 which is working fine. Now it uses Nimbus Sans L
and the ligatures are fine.
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https://bugs.launchpad.net/bugs/1379375
Title:
evince does not display ligatures
Status in fontconfig package in Ubuntu:
Confirmed
Status in poppler package in Ubuntu:
Fix Released
Status in fontconfig source package in Trusty:
Won't Fix
Status in poppler source package in Trusty:
In Progress
Status in fontconfig source package in Utopic:
Won't Fix
Status in poppler source package in Utopic:
In Progress
Bug description:
[ Description ]
Some ligatures (e.g. "fi") are not displayed in certain fonts, because
there are two different naming schemes in use in the wild.
[ Fix ]
Poppler upstream fixed this by adding a lookup table to fall back to
the second scheme if necessary.
[ QA ]
1. Install tex-gyre
2. Download https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1317599/+attachment/4213588/+files/rfa1415_15sep_lect1.pdf
3. Open the file in evince
4. Look at "Biometrics: file" on page 3
If the "fi" ligature in "file" is not displayed, you have this bug.
"file" should be displayed normally after it's fixed.
[ Regression potential ]
Since this patch implements a fallback only when lookup false, there
shouldn't be any problems. Still, check all existing PDFs are still
displayed correctly.
[ Original report ]
While there's Bug #1325230 with the same title and the linked PDFs there are working fine here (displaying "fi" correctly) there seems to be still some bug regarding ligatures.
https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1325230
I have some PDFs substituting Helvetica (and others) with TeX Gyre
Heros and showing no "fi" ligature. I attached a patch I derived from
the patch in Bug #1325230 which is working fine. Now it uses Nimbus
Sans L and the ligatures are fine.
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References