The bug is in fontconfig. Fontconfig added the Gyre font names to the list of suitable replacements for the base PostScript fonts because the shapes and metrics are compatible.
What they didn’t notice (until the bug reports started) is that the Gyre authors use the names /f_i, /f_l, /f_f, /f_f_i and /f_f_l for the f-ligs, whereas the original PS fonts — which predate the current glyph name best practices — used the names /fi, /fl. When rendering a pdf file which uses fonts but does not embed them or embed subsets of them, the renderer needs to find a substitute. If fontconfig is used to find such a substitute, and it returns a font which lacks the glyph names said renderer wants — even if it has the glyphs under a different name — the desired glyph will not get painted. Ideally, renderers would notice that the glyph name they want is unavailable and look for alternate names. Or in the case of a known ligature fall back to the un-ligated glyphs. But that hasn’t been written. The quick fix is to limit font equivilents to those which also have the same glyph naming scheme. Fontconfig did that in commit c6aa4d4bfc, in responce to the freedesktop bug report noted above. Distributions should make the same change in their fontconfig packaging. Distributions should do the same. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to tex-gyre in Ubuntu. https://bugs.launchpad.net/bugs/1317599 Title: Evince doesn't show "fi"-ligatures in a pdf file Status in “tex-gyre” package in Ubuntu: Confirmed Bug description: When I open the attached pdf file, evince doesn't show the "fi"-ligatures, e.g. on page 17 I only see "Preface to the rst edition". But when I mark text and copy it, the "fi" is also in there. Also printing works fine. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: evince 3.10.3-0ubuntu10 ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 CurrentDesktop: Unity Date: Thu May 8 18:54:09 2014 ExecutablePath: /usr/bin/evince InstallationDate: Installed on 2012-09-03 (612 days ago) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) SourcePackage: evince UpgradeStatus: Upgraded to trusty on 2014-04-18 (20 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/tex-gyre/+bug/1317599/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
