Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1646687 - bad hinting instructions from bug in ttfautohint
Summary: bad hinting instructions from bug in ttfautohint
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: ttfautohint
Version: 29
Hardware: All
OS: All
unspecified
unspecified
Target Milestone: ---
Assignee: Yaakov Selkowitz
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 1646688
TreeView+ depends on / blocked
 
Reported: 2018-11-05 20:49 UTC by Hin-Tak Leung
Modified: 2018-12-22 03:01 UTC (History)
2 users (show)

Fixed In Version: ttfautohint-1.8.2-1.fc29
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
: 1646688 1648612 (view as bug list)
Environment:
Last Closed: 2018-12-22 03:01:46 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Hin-Tak Leung 2018-11-05 20:49:47 UTC 
Description of problem:

This was discussed in freetype-devel for much of early October under the thread "rendering issues with xpdf (and other viewers)".

upstream patch (this was applied after 1.8.2) - you will need to push this to all the fonts affected - in particular, lohit-devanagari-fonts-2.95.4-5.fc29.noarch

commit f18b7c859c92111446ca991743dd709e347d0301 (HEAD -> master, origin/master, origin/HEAD)
Author: Werner Lemberg <wl>
Date:   Sat Oct 6 09:04:35 2018 +0200

    tafpgm.c: Fix stem width offset handling in storage area.
    
    Problem reported by Hin-Tak Leung <htl10.net>.


Version-Release number of selected component (if applicable):
ttfautohint-1.8.1-4.fc29.x86_64

How reproducible:
Always

Steps to Reproduce:
1. "ftview 53 /usr/share/fonts/lohit-devanagari/Lohit-Devanagari.ttf"
2. navigate to glyph idx 472 with F9/F10/F11/F12
3. use up/down arrow key to see that the circular ring of 12 dots disappears and becomes 3 dots, etc. 

Actual results:
3 dots and fewer than 12 dots for many sizes below about 60.


Expected results:
12 dots for idx 472 at all sizes.

Additional info:
This was discussed on freetype-devel for much of early October under 'rendering issues with xpdf (and other viewers)'
Comment 1 Fedora Update System 2018-11-07 06:19:20 UTC 
ttfautohint-1.8.2-1.fc29 has been submitted as an update to Fedora 29. https://bodhi.fedoraproject.org/updates/FEDORA-2018-96f75e9054
Comment 2 Fedora Update System 2018-11-08 05:20:07 UTC 
ttfautohint-1.8.2-1.fc29 has been pushed to the Fedora 29 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2018-96f75e9054
Comment 3 Fedora Update System 2018-12-22 03:01:46 UTC 
ttfautohint-1.8.2-1.fc29 has been pushed to the Fedora 29 stable repository. If problems still persist, please make note of it in this bug report.
Note You need to log in before you can comment on or make changes to this bug.