[Libreoffice-bugs] [Bug 140642] New: Some images super blurry, but good again when zoomed or enlarged

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=140642

            Bug ID: 140642
           Summary: Some images super blurry, but good again when zoomed
                    or enlarged
           Product: LibreOffice
           Version: 7.0.4.2 release
          Hardware: All
                OS: Linux (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: documentfoundation_org at xibo.at

Description:
Last year I made lecture slides with google docs, then downloaded as pptx and
continued editing with libre office impress. This year I open the same files
again and some of the images become extremely blurry.

With some images it is possible to zoom in (using ctrl + mouse wheel), or
enlarge them (clicking and draging the green markers) and they become good
again. But this is not always possible. It seems that images that can be fixed,
are exported correctly to pdf, but those that stay broken are not.

Due to zooming fixing the issue, I suspect some sort of LOD issue, i.e. the
wrong LOD level being loaded.

I'm using Kubuntu 20.10 with Xorg and an NVidia GPU. I tried the stock libre
office packages (i think 7.0.3 or 4) and the 7.1.0.3 .deb packages from the
libre office download page. At the beginning I had a display scaling factor of
1.25 and hardware acceleration enabled, but switching both options off didn't
help.

Steps to Reproduce:
1. open the attached documents
2. go few slides down
3. at some point you should see super blurry cats and equations

Actual Results:
Some images are unacceptably blurry although the resolution is fine

Expected Results:
images should be rendered with their actual resolution.


Reproducible: Sometimes


User Profile Reset: No



Additional Info:
Version: 7.1.0.3 / LibreOffice Community
Build ID: f6099ecf3d29644b5008cc8f48f42f4a40986e4c
CPU threads: 24; OS: Linux 5.8; UI render: default; VCL: kf5
Locale: en-IE (en_IE.UTF8); UI: en-US
Calc: threaded

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