SUMMARY Scrolling after zoom is not smooth after Windows 10 2004 update. STEPS TO REPRODUCE 1. Set up Windows 10 2004 update 2. Open PDF file 3. Zoom in text 4. Try to scroll OBSERVED RESULT Scrolling is smooth before zoom, but after zoom, it isn't. EXPECTED RESULT Always smooth scrolling. SOFTWARE/OS VERSIONS Windows 10 ver. 2004
I don’t understand how to reproduce this. (Possible that this has been fixed already.) If this is still reproducible, can you try to explain it more precisely? E. g.: Which exact zoom scales did you use? Which kind of input did you use to scroll?
Unfortunately, this bug still exists. I use my laptop Lenovo Ideapad 720s-15. Therefore, the input device is the touchpad. I don't see this effect with a zoom scale of 150% and less. But at zoom scale 200% and higher scrolling became uneven. Sorry for a hazy explanation in June, I was preparing for my exam and didn't have a lot of time.
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I forgot to change the status. See my previous comment.
Sorry, it is still unclear to me. I understand that you use your touchpad for scrolling. Therefore, you should have pixel-wise scrolling. What we call “smooth scrolling” in Okular (since release 1.10 / 20.04), is not applied to pixel-wise scrolling with a touchpad. Smooth scrolling means to us that the content moves stepwise (like when you press the arrow keys), but with an animated transition. (Apparently you have a 141dpi screen, so I estimate between 150% and 200% your Okular turns on tiled rendering.) Is the problem that the content briefly disappears when you scroll at high zoom scales? (Another theory is that your Okular does not turn on tiled rendering for some reason, and so operates with too big pixmaps.) Is the problem that the performance is bad when you scroll at high zoom scales, so the content moves at irregular large steps instead of pixel-wise?
OK, I think this bug or not a bug is insignificant and both of us shouldn't spend time on it. Thank you!