evince does not display ligatures

[hede]

[ 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.

[hede (michael-heide)]

To make it clearer: Bug #1379375 treats TeX Gyre Termes, while this one treats TeX Gyre Heros. (Termes vs. Heros)

[Ubuntu Foundations Team Bug Bot (crichton)]

The attachment "the patch only (no debdiff)" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

[Iain Lane (laney)]

Could you try the poppler patch in http://cgit.freedesktop.org/poppler/poppler/commit/?id=01723aa17e836e818158dbdc56df642a290be300 ?

[madbiologist (me-again)]

The patch mentioned in comment #5 is included in poppler 0.28.1-1ubuntu1, which is currently available in Ubuntu 15.04 "Vivid Vervet" development version.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Alexander Buchner (alexander-buchner)]

What is the difference between this bug and https://bugs.launchpad.net/bugs/1317599 ?

[madbiologist (me-again)]

I could be wrong, but it seems to me that bug 1317599 was originally filed about a document that is typeset predominately in Times/Times-Roman. After that bug was fixed by modifying fontconfig, this bug remained for documents typeset in Helvetica. See also comment #3 in this bug. The poppler patch described in comment's #5 and #6 of this bug will fix both issues.

As a result of a fixed version of poppler being available, there are comments in an upstream bug report to revert the changes in fontconfig to avoid side-effects in LaTex and other programs using the TeX Gyre fonts.

[Iain Lane (laney)]

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.

[Launchpad Janitor (janitor)]

This bug was fixed in the package fontconfig - 2.11.1-0ubuntu6

---------------
fontconfig (2.11.1-0ubuntu6) vivid; urgency=medium

  * 0001-Revert-Bug-73291-poppler-does-not-show-fl-ligature.patch: Now poppler
    is fixed, revert the alias of TeX Gyre Termes to Times. (LP: #1379375)
 -- Iain Lane <email address hidden> Mon, 19 Jan 2015 13:24:12 +0000

[Alexander Buchner (alexander-buchner)]

Could someone please also fix the bug for 14.10?
For 14.10 there is only version 2.11.1-0ubuntu3 of fontconfig available.

[Iain Lane (laney)]

The fix is in poppler. See comment #10.

[Chris J Arges (arges)]

Hello hede, or anyone else affected,

Accepted poppler into trusty-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/poppler/0.24.5-2ubuntu4.2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Chris J Arges (arges)]

Hello hede, or anyone else affected,

Accepted poppler into utopic-proposed. The package will build now and be available at http://launchpad.net/ubuntu/+source/poppler/0.26.5-0ubuntu2 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, and change the tag from verification-needed to verification-done. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed. In either case, details of your testing will help us make a better decision.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance!

[Alexander Buchner (alexander-buchner)]

What is the exact name of the package that I have to install from utopic-proposed?

[madbiologist (me-again)]

According to https://launchpad.net/ubuntu/+source/poppler the package you want is libpoppler46

[Alexander Buchner (alexander-buchner)]

Updating libpoppler46 to the version in utopic-proposed didn't solve the problem for me. Do I have to restart something to see effects?

The attached file is still displayed incorrectly.

[Alexander Buchner (alexander-buchner)]

To clarify:
My version of libpoppler46 now is 0.26.5-0ubuntu2.

[Iain Lane (laney)]

You need libpoppler-glib8=0.26.5-0ubuntu2 as well for evince. I suggest
just upgrading all of the poppler packages you have installed.

See the attached screenshots for before/after when upgrading
libpoppler46 & libpoppler-glib8. I didn't restart the session, just
evince.

On Wed, Jan 21, 2015 at 04:22:05PM -0000, Alexander Buchner wrote:
> To clarify:
> My version of libpoppler46 now is 0.26.5-0ubuntu2.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1379375
>
> Title:
> evince does not display ligatures
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1379375/+subscriptions
>

--
Iain Lane [ <email address hidden> ]
Debian Developer [ <email address hidden> ]
Ubuntu Developer [ <email address hidden> ]

[Alexander Buchner (alexander-buchner)]

Yeah!
Updating libpoppler-glib8 to 0.26.5-0ubuntu2 solved my problem.

[Launchpad Janitor (janitor)]

This bug was fixed in the package poppler - 0.24.5-2ubuntu4.2

---------------
poppler (0.24.5-2ubuntu4.2) trusty; urgency=medium

  * 0001-Map-Standard-Expert-encoding-ligatures-to-AGLFN-name.patch:
    Cherry-pick patch from upstream to fix ligature mapping with substitute
    fonts which don't use the current standard glyph names. (LP: #1379375)
 -- Iain Lane <email address hidden> Mon, 19 Jan 2015 13:18:49 +0000

[Chris J Arges (arges)]

The verification of the Stable Release Update for poppler has completed successfully and the package has now been released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.

[Launchpad Janitor (janitor)]

This bug was fixed in the package poppler - 0.26.5-0ubuntu2

---------------
poppler (0.26.5-0ubuntu2) utopic; urgency=medium

  * 0001-Map-Standard-Expert-encoding-ligatures-to-AGLFN-name.patch:
    Cherry-pick patch from upstream to fix ligature mapping with substitute
    fonts which don't use the current standard glyph names. (LP: #1379375)
 -- Iain Lane <email address hidden> Mon, 19 Jan 2015 12:52:43 +0000