Bug 70775 - Arabic font rendering problems of varying severity depending on the font
Summary: Arabic font rendering problems of varying severity depending on the font
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: graphics stack (show other bugs)
(earliest affected) release
Hardware: x86-64 (AMD64) Windows (All)
: medium normal
Assignee: Not Assigned
Whiteboard: BSA target:5.3.0
Depends on: HarfBuzz
Blocks: RTL-CTL Kashida-Justification
  Show dependency treegraph
Reported: 2013-10-22 18:26 UTC by Mohammed Arabiat
Modified: 2022-09-14 16:14 UTC (History)
5 users (show)

See Also:
Crash report or crash signature:

A picture explaining the font rendering problems I am currently experiencing. (193.61 KB, image/png)
2013-10-22 18:26 UTC, Mohammed Arabiat
I thought it would be a good idea to attach the sample file used in the screenshots. (14.09 KB, application/vnd.oasis.opendocument.text)
2013-10-23 16:40 UTC, Mohammed Arabiat
screenshot with red squares around the problem (194.58 KB, image/png)
2014-11-15 14:16 UTC, Yousuf Philips (jay) (retired)

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Description Mohammed Arabiat 2013-10-22 18:26:05 UTC
Created attachment 88015 [details]
A picture explaining the font rendering problems I am currently experiencing.

Problem description: 
Arabic fonts have various problems rendering. These following screenshots should be descriptive enough of the problem.

The attached picture provides a couple of examples of the problem. The red color marks the artifacts at a 100% zoom setting, green marks the artifacts that are no longer there at 150% zoom level while the blue marks show new artifacts that show up on the 150% zoom level but not on 100%. The third picture is using an another font that is completely unusable at this point.

I'm sorry if I did anything wrong in regards of this bug report.
Operating System: Windows 8
Version: release
Comment 1 Mohammed Arabiat 2013-10-23 16:40:03 UTC
Created attachment 88044 [details]
I thought it would be a good idea to attach the sample file used in the screenshots.
Comment 2 Mohammed Arabiat 2013-11-02 06:29:16 UTC
Updated version to release, as it still exists there.
Comment 3 bfoman (inactive) 2013-11-20 21:43:03 UTC
Please do not change version field as it indicates the first release where bug occurred.
Potential candidate for https://bugs.freedesktop.org/show_bug.cgi?id=43808 meta bug - adding Lior Kaplan to CC list.
Comment 4 Maxim Monastirsky 2013-11-24 13:14:23 UTC
The attached file shows an assert in vcl/win/source/gdi/winlayout.cxx:1342, like in Bug 67601.

Build ID: 732ec36edfd09d2091d70c4d71b5f182fe279c45
TinderBox: Win-x86@39, Branch:master, Time: 2013-11-24_00:16:51
Comment 5 tommy27 2014-10-17 10:24:50 UTC
@Mohammed Arabiat
please give an update of the bug status in current LibO
is bug still there?
Comment 6 Mohammed Arabiat 2014-10-17 11:15:51 UTC
The bug is still present, unfortunately.
Comment 7 Yousuf Philips (jay) (retired) 2014-11-15 14:07:30 UTC
Confirmed the artifacts in master on Windows and Linux with the Traditional Arabic font, though it appeared next to different letters for me. :D

Tested the sample file in Word 2013 and there were no artifacts there.

Build ID: 89db5b5b88508e55bce50240d248dd26053f4e09
TinderBox: Linux-rpm_deb-x86@45-TDF, Branch:master, Time: 2014-11-12_20:58:53
Comment 8 Yousuf Philips (jay) (retired) 2014-11-15 14:16:58 UTC
Created attachment 109519 [details]
screenshot with red squares around the problem
Comment 9 Yousuf Philips (jay) (retired) 2015-01-06 16:00:20 UTC
This likely is a kashida problem so adding links to other bugs with similar problems.
Comment 10 QA Administrators 2016-02-21 08:38:04 UTC
** Please read this message in its entirety before responding **

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