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Bug 136940 - A thin vertical line is visible in presentation mode
Summary: A thin vertical line is visible in presentation mode
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Impress (show other bugs)
Version:
(earliest affected)
6.3.0.3 rc
Hardware: All All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: bibisectRequest, possibleRegression
Depends on:
Blocks:
 
Reported: 2020-09-21 20:44 UTC by Telesto
Modified: 2020-11-20 11:04 UTC (History)
2 users (show)

See Also:
Crash report or crash signature:


Attachments
Example file (54.39 KB, application/vnd.oasis.opendocument.presentation)
2020-09-21 20:44 UTC, Telesto
Details
Screenshot with white line (205.66 KB, image/png)
2020-10-09 09:56 UTC, JonIrenicus
Details

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Description Telesto 2020-09-21 20:44:03 UTC
Description:
A thin vertical line is visible in presentation mode (Skia & GDI and OpenGL)

Steps to Reproduce:
1. Open the attached file
2. Press F5

Actual Results:
Small thin line through Y

Expected Results:
Not so


Reproducible: Always


User Profile Reset: No



Additional Info:
Found in
7.1

6.3

not in
6.2 (has horizontal lines in it)
Comment 1 Telesto 2020-09-21 20:44:19 UTC
Created attachment 165745 [details]
Example file
Comment 2 Timur 2020-10-09 06:36:18 UTC
No repro LO 7.1+ in Windows. 
Please add screenshot, looks like PrtScn works, better mark line, I use IrfanView. 
And do not put bibisectRequest before problem is confirmed, also do it yourself.
Comment 3 Timur 2020-10-09 06:44:42 UTC
*** Bug 137329 has been marked as a duplicate of this bug. ***
Comment 4 JonIrenicus 2020-10-09 09:51:06 UTC
Can't reproduce the bug - the Impress hangs after slide show run (F5). 
New bug?
Comment 5 JonIrenicus 2020-10-09 09:56:48 UTC
Created attachment 166230 [details]
Screenshot with white line

In Safe mode file opens with the white line.
P.S. It takes a long time to open.
Comment 6 Telesto 2020-10-09 20:39:02 UTC
Setting to NEW, based on comment 5.

(In reply to JonIrenicus from comment #5)
Safe mode file opens with the white line.
> P.S. It takes a long time to open.

What is 'long'. It's bit slow on first open. But don't experience really slowness (2/3 seconds maybe?)
Comment 7 JonIrenicus 2020-10-10 12:21:54 UTC
The current slide is opening in full screen (slide Show Shift-F5) about 5 seconds.
Others slides, with charts circles and a lot of graphics opening in 1-2 seconds.
Comment 8 Luboš Luňák 2020-11-20 11:04:46 UTC
Not specific to any drawing backend, I can reproduce with kf5, gtk3, win, opengl. With some there's no just one line but a grid of them.

It seems it's FillGraphicPrimitive2D::create2DDecomposition() decomposing bitmap tiling in a way that introduces rounding errors.