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sumatrapdfreader / sumatrapdf

SumatraPDF reader
http://www.sumatrapdfreader.org
GNU General Public License v3.0
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Scrolling jerky in high dpi dell xps 13 after fall creators update #962

Open kjk opened 6 years ago

kjk commented 6 years ago

Source: https://forum.sumatrapdfreader.org/t/scrolling-on-hidpi-settings/823/1

SumatraPeter commented 6 years ago

Also see original thread about this issue: https://forum.sumatrapdfreader.org/t/support-for-smooth-scrolling/90

awesomeferret commented 2 years ago

Interesting that this is still open. What really interesting though, is that there is smooth scrolling at all? SumatraPDF has always had jerky unsmooth scrolling, no matter the PC configuration. Does Sumatra actually have smooth scrolling? There's a lot of evidence that it doesn't. This isn't a power-related thing either, since EVERY other PDF viewer (including web browsers) scroll PDFs very smoothly at 60 FPS.

GitHubRulesOK commented 2 years ago

@awesomeferret there have been changes including recently ( https://github.com/sumatrapdfreader/sumatrapdf/commit/0b61c1ee23ed05446809f783fef19b0bfcd466d5) so try current pre-release, https://www.sumatrapdfreader.org/prerelease however part of the problem is the underlying technology of rendering PDFs that are not a continuous stream of pixels like on an image even if that's what they are eventually shown as.

On Windows User Interface much of scroll behavior is governed by traditional drivers that use a text line by line model (see system mouse scroll settings) that needs to be ignored by developer teams writing a dedicated mouse (or other device) handler. Great fun if you have 20,000 employees (like Adobe) paid by subscription or licensing.