[okular] [Bug 423360] Viewport blinks (flashes, disappears) while scrolling or dragging at moderate or high zoom levels

[David Hurka]

https://bugs.kde.org/show_bug.cgi?id=423360

--- Comment #3 from David Hurka <david.hurka at mailbox.org> ---
(In reply to Albert Astals Cid from comment #1)
> > Page is always shown, at least where it is already rendered
> 
> That's a wrong expectation, at some point we need to evict pages already
> rendered because otherwise at very high zoom levels we'd just fill all your
> memory.
> 
> Now, is this a regression and this should not be happening? Maybe, I'm just
> writing here to make clear that your expectation is not 100% correct.

Yes, my expectation should read “Page is always shown, at least when the
correct pixmaps are right now available in the memory”.

Yes, I think this is a regression linked to QScroller, but the issue existed
before. But it was much less visible before.

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