https://bugs.documentfoundation.org/show_bug.cgi?id=163220

            Bug ID: 163220
           Summary: Impress slide random corruption when displaying them
                    full screen with 24.8.2
           Product: LibreOffice
           Version: 24.8.2.1 release
          Hardware: All
                OS: Windows (All)
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: [email protected]
          Reporter: [email protected]

Description:
This is a very sneaky one since it seems impossible to make it perfectly
reproducible. After upgrading to 24-8-2 from 24-8-1, the attached Impress file
started to display corrupted objects when showing its slides full screen
(typically, text object monstrously larger of smaller than intended). When
closing and reopening the file, things changed but the problem remained, with
other objects being corrupted in the same fashion. Which objects would display
corrupted seemed to be quite random, or at least I couldn't find any logic to
predict such corruption.
I had upgraded this morning from 24.8.1 to 24.8.2 just this morning and had the
unpleasant surprise to discover this while trying to show the slides in the
afternoon lecture in front of some 50 students... very unpleasant...
To allow everybody to grasp what is happening, I will attach 
a) the impress file where I had the problem (maybe the culprit is the file
itself? I do not know, but with 24.8.1 as well as an old portable 6.1.4,
nothing of the sort ever occurred with this same file).
b) a shot video with the screen capture of what I see on the screen
After producing the video, I will be forced to downgrade to 24.8.1 until this
is solved. Thanks as always

Steps to Reproduce:
1.Open the attached file, go for example to slide 72 and start the full screen
presentation from there
2.If things work as they do on my notebook, many text objects will be shown in
a totally different - and corrupted - fashion with respect to what you see on
the same slide while in edit mode. Typically text will appear with different
formatting, totally inappropriate on the screen, making the displayed slide
unreadable
3.If this does not happen on your machine, please check the attached video to
see what is happening here.

Actual Results:
Slides are randomly corrupted when shown full screen

Expected Results:
the full screen display of all slides should exactly mimic in a larger fashion
what you see in the slide while in edit mode.
None of the display corruption happens with 24.8.1 or earlier versions


Reproducible: Always


User Profile Reset: No

Additional Info:
Version: 24.8.2.1 (X86_64) / LibreOffice Community
Build ID: 0f794b6e29741098670a3b95d60478a65d05ef13
CPU threads: 8; OS: Windows 10 X86_64 (10.0 build 17763); UI render:
Skia/Raster; VCL: win
Locale: it-IT (it_IT); UI: it-IT
Calc: threaded

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