[Libreoffice-bugs] [Bug 139664] New: After "back" the animation effect, the reproduction of the animation effect is broken.

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=139664

            Bug ID: 139664
           Summary: After "back" the animation effect, the reproduction of
                    the animation effect is broken.
           Product: LibreOffice
           Version: 7.0.4.2 release
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: medium
         Component: Impress
          Assignee: libreoffice-bugs at lists.freedesktop.org
          Reporter: hy531067 at gmail.com

Description:
 Add animation effects to objects from the sidebar. Start a slide show. If you
continue to advance the animation effect, there is no problem.
　However, if you back out of the effect even once, you will experience a
regular disruption of the playback order.
　Example.
The order of the effects of an object is indexed as 1, 2, 3, 4, 5, 6, 7, 8.
Suppose we advance to index number 8.
Now, back up once.
Then, it will go back to the previous number 7. However, the worst step, 1,
will always disappear as well.
　　If you back up at 12345678, the number will become 234567, and two objects
will disappear.
After this, if you back up again, the playback of the objects will always
return by two at a time.
After that, you can proceed again.
If you go forward 4 times, the animation effect for that index number x+4 will
not be played.
The effect of index number x+4 will return when you "back up" after further
"forward" progress.
　As far as I know, this phenomenon has been seen in versions 6.1 and later.
　The same thing used to happen when I removed the graphics accelerator feature
from the options.

Translated with www.DeepL.com/Translator (free version)

Steps to Reproduce:
1.Create 10 pieces of text and graphics.
2.Give animation effects to the objects you create.
3.Play the effect in a slide show.
4.Turn the slideshow back on while it is playing.
5.After this, each time you repeat "forward" or "backward", the order will not
be correct.
6.Basically, the index number 1 of the slide will remain unchanged.

Actual Results:
1234567→"BACK"
→X23456X→"BACK"
→X234△△X→"BACK"
→X2○○△△X→"forward" times 5steps
→X2345X7

Expected Results:
In the slideshow, the correct animation effect is played back one by one, even
when I click "forward" or "backward".


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
Version: 7.0.4.2
Build ID: dcf040e67528d9187c66b2379df5ea4407429775
CPU threads: 6; OS: Linux 5.4; UI render: default; VCL: gtk3
Locale: ja-JP (ja_JP.UTF-8); UI: ja-JP
Calc: threaded

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