davidedmundson added inline comments.

INLINE COMMENTS

> graesslin wrote in scene_opengl.cpp:1191-1194
> This combination also looks dangerous. If the context was already current it 
> might disable it for another user inside KWin.

changed is called from a timer, so we can be pretty confident that we're called 
mid-doing anything else, but I'm happy to do something else?

to be clear are you suggesting we:

- makeOpenGLContextCurrent() but then don't call doneOpenGLContextCurrent?

or

- set a flag, and delete it next perfectPaintWindow

or

- something completely different

Note that I have this same pattern in my BlurEffect mod I phab'd yesterday, so 
I'll make that follow this.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D7888

To: davidedmundson, #plasma, graesslin
Cc: graesslin, plasma-devel, kwin, #kwin, bwowk, ZrenBot, progwolff, 
lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart

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