Bug 443008 - ugly ligatures
ugly ligatures
Status: CLOSED UPSTREAM
Product: Fedora
Classification: Fedora
Component: pango (Show other bugs)
8
All Linux
low Severity low
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Assigned To: Behdad Esfahbod
Fedora Extras Quality Assurance
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Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2008-04-18 01:50 EDT by Daniel Colascione
Modified: 2008-04-18 12:58 EDT (History)
1 user (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Last Closed: 2008-04-18 12:58:53 EDT
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RHEL 7.3 requirements from Atomic Host:
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Attachments (Terms of Use)
ugly ligatures (11.46 KB, image/png)
2008-04-18 01:50 EDT, Daniel Colascione
no flags Details
same word, MOZ_DISABLE_PANGO=1 (11.50 KB, image/png)
2008-04-18 01:56 EDT, Daniel Colascione
no flags Details

  None (edit)
Description Daniel Colascione 2008-04-18 01:50:21 EDT
Description of problem:
See attached screenshot. DejaVu is the default font, and its western ligatures
look, well, ugly, and are disconcerting. I can reproduce the problem with GTK
programs but not QT ones.

Version-Release number of selected component (if applicable):
pango-1.18

How reproducible:
Every time

Steps to Reproduce:
1. Use DejaVu LGC or another font with ligatures
2. Type "confirms" (or "firefox") western text into Pango-using program
3. See apparent ugly baseline shift
  
Actual results:
Ugly ligatures makes text look misaligned

Expected results:
Characters that appear to share a baseline

Additional info:
Comment 1 Daniel Colascione 2008-04-18 01:50:21 EDT
Created attachment 302837 [details]
ugly ligatures
Comment 2 Daniel Colascione 2008-04-18 01:56:44 EDT
Created attachment 302839 [details]
same word, MOZ_DISABLE_PANGO=1

Disabling Pango eliminates the problem.
Comment 3 Ben Laenen 2008-04-18 07:11:54 EDT
IIRC, that problem happened when using the Freetype autohinter. Switching to 
the proper bytecode interpreter for font hinting solves that.
Comment 4 Nicolas Mailhot 2008-04-18 07:36:41 EDT
Then that's a freetype not pango bug IMHO. Please report it upstream.
Comment 5 Behdad Esfahbod 2008-04-18 12:58:53 EDT
yeah, it's autohinter issue with freetype.

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