Bug 145106 - Paint shows artifacts for <0,5 second) when zoom in/out on a table
Summary: Paint shows artifacts for <0,5 second) when zoom in/out on a table
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: Writer (show other bugs)
Version:
(earliest affected)
7.1.0.1 rc
Hardware: All All
: lowest trivial
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: bibisected, bisected, regression
Depends on:
Blocks: Zoom Skia
  Show dependency treegraph
 
Reported: 2021-10-13 07:54 UTC by Telesto
Modified: 2023-12-07 11:57 UTC (History)
1 user (show)

See Also:
Crash report or crash signature:


Attachments
Example file (9.93 KB, application/vnd.oasis.opendocument.text)
2021-10-13 07:55 UTC, Telesto
Details
Screencast (793.78 KB, video/mp4)
2021-10-13 07:58 UTC, Telesto
Details
Still of frame of screencast (167.56 KB, image/png)
2021-10-13 08:00 UTC, Telesto
Details
Bibisect log (3.05 KB, text/plain)
2021-10-28 12:35 UTC, Telesto
Details

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Description Telesto 2021-10-13 07:54:53 UTC
Description:
Paint shows artifacts for <0,5 second) when zoom in/out on a table

Steps to Reproduce:
1. Open the attached file
2. Scroll in/out using CTRL+SCROLL WHEEL. Notice a 'wave' from right to left in a split second..

Actual Results:
Flashing (especially the top row)

Expected Results:
Smooth


Reproducible: Always


User Profile Reset: No



Additional Info:
Version: 7.3.0.0.alpha0+ (x64) / LibreOffice Community
Build ID: 93115d2c54d645bcf2f80fde325e3ede39dee4d5
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL
Comment 1 Telesto 2021-10-13 07:55:09 UTC
Created attachment 175710 [details]
Example file
Comment 2 Telesto 2021-10-13 07:58:57 UTC
Created attachment 175711 [details]
Screencast
Comment 3 Telesto 2021-10-13 08:00:34 UTC
Created attachment 175712 [details]
Still of frame of screencast
Comment 4 Telesto 2021-10-13 08:06:26 UTC
Also in
Version: 7.1.0.0.alpha1+ (x64)
Build ID: 94ea1c89e959069aa7c735317470712012df2362
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: nl-NL
Calc: CL

it present in (or simply not noticeable in) 
Version: 7.0.0.0.beta1+ (x64)
Build ID: 2891e91a513520d68ea2b8c59c14335861a15253
CPU threads: 4; OS: Windows 6.3 Build 9600; UI render: Skia/Raster; VCL: win
Locale: nl-NL (nl_NL); UI: en-US
Calc: CL
Comment 5 Dieter 2021-10-28 07:29:33 UTC
I confirm it with

Version: 7.2.2.2 (x64) / LibreOffice Community
Build ID: 02b2acce88a210515b4a5bb2e46cbfb63fe97d56
CPU threads: 4; OS: Windows 10.0 Build 19043; UI render: Skia/Raster; VCL: win
Locale: de-DE (de_DE); UI: en-GB
Calc: CL

BTW: I think it's not worth to report it, until we have thousands of other open bugs.
Comment 6 Telesto 2021-10-28 12:35:59 UTC
Created attachment 175973 [details]
Bibisect log

Bisected to
author	Luboš Luňák <l.lunak@collabora.com>	2020-10-06 22:14:36 +0200
committer	Luboš Luňák <l.lunak@collabora.com>	2020-10-08 13:40:14 +0200
commit d18731f71c60cbb6c02cabb042004b1aa9454de8 (patch)
tree 36870456fc84f62b2ab85a3bad1971641856cbda
parent 47fda617fc4dad8273919227ca45ea3b8b61aea1 (diff)
track dirty areas for Skia drawing
Updates to the screen in raster mode aren't _that_ slow, in fact
it seems using SkRegion can make things slower because of manipulating
the region, but with SkIRect this could sometimes help a bit.
It also appears that StretchDIBits() that is used by the Windows
raster code doesn't work correctly if only a subset of the y-axis
range is specified, which reduces the usefulness.

https://cgit.freedesktop.org/libreoffice/core/commit/?id=d18731f71c60cbb6c02cabb042004b1aa9454de8
Comment 7 Telesto 2021-10-28 13:37:18 UTC
(In reply to Dieter from comment #5)
> BTW: I think it's not worth to report it, until we have thousands of other
> open bugs.

I still think it worth reporting (even with 1000 of other reports). In case more issues appear in the same area. Or simply the fact that a certain commit having a side-effect. Maybe more appear over time?

And there might be some (minority) who find this problematic. People with epilepsy (flashing trigger an 'attack'), or idiots like me who find it distracting
Comment 8 Telesto 2021-10-28 14:00:35 UTC
Adding CC to Luboš Luňák
Comment 9 QA Administrators 2023-10-29 03:13:30 UTC Comment hidden (obsolete)
Comment 10 Robert Deck 2023-12-07 11:57:05 UTC
There have been thousands of bug fixes and commits since anyone checked on this bug report. During that time, it's possible that the bug has been fixed, or the details of the problem have changed. We'd really appreciate your help in getting confirmation that the bug is still present.

If you have time, please do the following:

Test to see if the bug is still present with the latest version of LibreOffice from https://guestsarticles.com/