Bug 47719 - SLIDESHOW shows Han characters fat and ugly with Hardware Acceleration activated
Summary: SLIDESHOW shows Han characters fat and ugly with Hardware Acceleration activated
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
(earliest affected)
3.5.1 release
Hardware: All Linux (All)
: medium major
Assignee: Not Assigned
: 51051 (view as bug list)
Depends on:
Blocks: CJK
  Show dependency treegraph
Reported: 2012-03-22 07:14 UTC by Cheng-Chia Tseng
Modified: 2015-01-07 15:15 UTC (History)
4 users (show)

See Also:
Crash report or crash signature:

The sample presetation. (1.43 MB, application/vnd.oasis.opendocument.presentation)
2012-03-22 07:14 UTC, Cheng-Chia Tseng
The screenshot of design preveiw, Hardware Acceleration activated and disabled comparison. (421.04 KB, image/png)
2012-03-22 07:15 UTC, Cheng-Chia Tseng
“AR PL UMing TW” bold font Impress odp file (20.81 KB, application/vnd.oasis.opendocument.presentation)
2012-06-01 18:06 UTC, hayno
“AR PL UMing TW” bold font in Impress screenshot (68.31 KB, image/png)
2012-06-01 18:08 UTC, hayno

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Description Cheng-Chia Tseng 2012-03-22 07:14:12 UTC
Created attachment 58872 [details]
The sample presetation.

With sample document (as attachment), Han characters on first slide will be shown too fat and ugly during slide show with "Hardware Acceleration" activated.

Steps how to reproduce with "LibreOffice 3.5.1" on Fedora x64 plaform.

1. open document, activate menu 'Tools -> Options -> Viewing -> 
   Hardware acceleration' if necessary
2. start the slideshow with first slide and compare text view with text view in 
   edit mode. 
   Expected: no difference
   Actual: During slideshow, Han characters became fat (looks like many strokes overlapping each other) and ugly.

The ugly text also is visible with presentations created from the scratch.
Comment 1 Cheng-Chia Tseng 2012-03-22 07:15:34 UTC
Created attachment 58873 [details]
The screenshot of design preveiw, Hardware Acceleration activated and disabled comparison.
Comment 2 sasha.libreoffice 2012-03-25 23:14:35 UTC
Thanks for bugreport
Reproduced in 3.3.4 and 3.5.1 on Fedora 64 bit (Linux only problem)
Comment 3 V字龍(Vdragon) 2012-04-26 07:51:49 UTC
Reproduced in 3.5.2 on Linux Mint 12(32 bit)
Comment 4 hayno 2012-06-01 18:06:00 UTC
Created attachment 62402 [details]
“AR PL UMing TW” bold font Impress odp file
Comment 5 hayno 2012-06-01 18:08:07 UTC
Created attachment 62403 [details]
“AR PL UMing TW” bold font in Impress screenshot

If Hardware Acceleration is activated ,“AR PL UMing TW” bold font becomes ugly.

Hardware Acceleration will cause problem when displaying “AR PL UMing TW” bold font.

This problem has been exist in OpenOffice and LibreOffice on Linux.
Comment 6 hayno 2012-06-01 18:47:01 UTC
uming.ttc can be downloaded from 
Comment 7 vitriol 2012-06-13 22:11:05 UTC
*** Bug 51051 has been marked as a duplicate of this bug. ***
Comment 8 QA Administrators 2015-01-05 17:51:06 UTC
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Comment 9 Cheng-Chia Tseng 2015-01-07 14:15:26 UTC
The issue solved at LibreOffice on Fedora 21.

If the problem appears again, please reopen this bug report.
Comment 10 V字龍(Vdragon) 2015-01-07 15:15:39 UTC
I can't reproduce the bug on too.