[Libreoffice-bugs] [Bug 128353] Impress: Animated video GIF, WMV, AVI do not play anymore in GDI with some video cards- OK with Shift+F5 on slide (OK in OpenGL or Skia)

[bugzilla-daemon at bugs.documentfoundation.org]

https://bugs.documentfoundation.org/show_bug.cgi?id=128353

--- Comment #25 from Miklos Vajna <vmiklos at collabora.com> ---
This bug is marked as a bisected regression regarding the Windows GDI
rendering. So please let's focus on what is bad with the above commit and what
is good with the commit before. I compared the slideshow behavior for slide 5
(the one that contains 2 videos) for the two commits on Windows 10 (with GDI,
i.e. SAL_DISABLEGL=1) and I don't see a difference.

I also tried 6.3.5.2 on Windows 7, again both videos are playing on slide 5. Is
there anything else I can try?

I also tested that the fixes for bug 112318 and bug 124756 are still needed, so
reverting is not a good idea.

I could tweak the above commit to still avoid paining for the media window and
then change vcl to not emit invalidations for system child windows when their
painting is disabled.. but I don't like blind fixes, it would be good to see
the problem locally first. Thanks.

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