Bug 443008 – ugly ligatures

Bug 443008 - ugly ligatures

Summary:	ugly ligatures

Status:	CLOSED UPSTREAM

Aliases:	None

Product:	Fedora
Classification:	Fedora
Component:	pango (Show other bugs)
Sub Component:
Version:	8
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Behdad Esfahbod
QA Contact:	Fedora Extras Quality Assurance
Docs Contact:

URL:
Whiteboard:
Keywords:

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2008-04-18 01:50 EDT by Daniel Colascione
Modified:	2008-04-18 12:58 EDT (History)
CC List:	1 user (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2008-04-18 12:58:53 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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
Add an attachment (proposed patch, testcase, etc.)

Groups: 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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