Issue 106530 - Impress: improper display of very thin lines in presentation mode (thin lines)
Summary: Impress: improper display of very thin lines in presentation mode (thin lines)
Alias: None
Product: Impress
Classification: Application
Component: viewing (show other issues)
Version: OOo 3.1.1
Hardware: All All
: P3 Trivial (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Keywords: oooqa
Depends on:
Reported: 2009-11-01 19:55 UTC by hardy314
Modified: 2017-05-20 11:11 UTC (History)
2 users (show)

See Also:
Issue Type: DEFECT
Latest Confirmation in: ---
Developer Difficulty: ---

small presentation document to show this rectangle display behavior (14.70 KB, application/vnd.oasis.opendocument.presentation)
2009-11-01 19:56 UTC, hardy314
no flags Details
Screenshots showing bug (84.31 KB, application/pdf)
2009-11-02 06:27 UTC, Rainer Bielefeld
no flags Details

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Description hardy314 2009-11-01 19:55:48 UTC
This behavior occured with the latest OO version 3.1.1 on Ubuntu Linux 9.10
(OOo310m19 build: 9420 in )

Here is how to reproduce it:

* create a new Impress presentation
* use the square tool (button on left side) to draw 
  a rectangle onto the first slide
* change the background color to None (i.e. transparent)
* change the line width to 0.02cm (i.e. very thin)
* on the normal layout everything looks fine until now :)
* now change to the presentation mode (full screen display)
* here the rectangle gets displayed as only some lines :(
  (in most cases 1, 2 or 3 lines are display, depends on position of rectangle)

This misbehavior does NOT happen with the same document using OO3.1.1 under WinXP.

I will attach a small sample document for quicker reproduction of this misbehavior.
Comment 1 hardy314 2009-11-01 19:56:43 UTC
Created attachment 65830 [details]
small presentation document to show this rectangle display behavior
Comment 2 Rainer Bielefeld 2009-11-02 05:10:26 UTC
NOT reproducible with "RectangleBug.odp" and "Ooo 3.1.1 WIN XP DE-multilingual
version German UI activated [OOO310m19 (Build 9420)]"!

Reproducible after I reduced line width to 0,05mmm for all lines (not only

On my PC switching on / off hardware acceleration had an influence, but switch
off did not heal the problem:
Graphic Card: Nvidia GeForce 7300 LE
Processor: AMD Athlon 64 Bit 3500+
Monitor : 1024*768

It seems that anti aliasing causes the problem. I added an additional obfect
with 1mm line width, and I only see a difference between with and without anti
aliasing in Presentation edit mode, but not during the show, there aa seems to
be always active.

No problem with 2.4.1
Comment 3 Rainer Bielefeld 2009-11-02 06:27:25 UTC
Created attachment 65839 [details]
Screenshots showing bug
Comment 4 wolframgarten 2009-11-02 08:16:07 UTC
Reproducible. Reassigned.
Comment 5 hardy314 2010-02-13 11:53:10 UTC
Ubuntu 9.10: 
    This still happens with OO 3.2.0. 
    (final release version from OOo website)

Win XP:
    I cannot reproduce this bug any more, now, with OO 3.2.0 
    (final release version)
Comment 6 Marcus 2017-05-20 11:11:30 UTC
Reset assigne to the default "".