Bug 379901

Summary: Libertine produces inappropriate ligatures
Product: [Fedora] Fedora Reporter: James <james>
Component: linux-libertine-fontsAssignee: Frank Arnold <frank>
Status: CLOSED UPSTREAM QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 7CC: fonts-bugs, kevin
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2007-11-13 17:03:23 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
Image displaying inappropriate ligatures none

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Fedora 7 because of an outdated fontforge package.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.