Bug 379901 - Libertine produces inappropriate ligatures
Summary: Libertine produces inappropriate ligatures
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Fedora
Classification: Fedora
Component: linux-libertine-fonts
Version: 7
Hardware: All
OS: Linux
low
medium
Target Milestone: ---
Assignee: Frank Arnold
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2007-11-13 13:04 UTC by James
Modified: 2007-11-30 22:12 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2007-11-13 17:03:23 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)
Image displaying inappropriate ligatures (35.23 KB, image/png)
2007-11-13 13:04 UTC, James
no flags Details

Description James 2007-11-13 13:04:19 UTC
Description of problem:
Pango's ligature detection is too keen (at least) with the Linux Libertine font.
It picks up things like fi, fl and ffi mid-word, but also spots roman numerals
and "No" as short for "number" when it's not appropriate.

Version-Release number of selected component (if applicable):
pango-1.16.4-2.fc7
linux-libertine-fonts-2.4.9-1.fc7

How reproducible:
Always.

Steps to Reproduce:
1. Start Pango-enabled app (e.g., Inkscape, Firefox).
2. Choose Linux Libertine font.
3. Find/type: difficult, UNIX, ASCII, Nobody.
  
Actual results:
See attached png (from Inkscape).

Expected results:
No ligature detection for UNIX, ASCII and Nobody.

Comment 1 James 2007-11-13 13:04:19 UTC
Created attachment 256821 [details]
Image displaying inappropriate ligatures

Comment 2 Ben Laenen 2007-11-13 15:14:55 UTC
Pango is just doing what the font requests: make a ligature for those 
sequences.  This is a bug in Libertine, so it should be fixed there.

Comment 3 James 2007-11-13 15:27:02 UTC
Understood, component name and description changed accordingly.

Comment 4 Frank Arnold 2007-11-13 16:44:43 UTC
Just relayed it to upstream. Roman numbers and "No" seem to be fixed with a more
recent version available in Fedora 8. Unfortunately this version won't build on
Fedora 7 because of an outdated fontforge package.

Comment 5 James 2007-11-13 17:03:23 UTC
Confirmed --- fixed in 2.6.9-1.fc8.


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