https://bugs.kde.org/show_bug.cgi?id=457321
Bug ID: 457321
Summary: Dragging to 100% zoom is not equivalent to 100%
Product: gwenview
Version: 22.04.3
Platform: Neon Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: gwenview-bugs-n...@kde.org
Reporter: doncb...@gmail.com
Target Milestone: ---
Created attachment 151014
--> https://bugs.kde.org/attachment.cgi?id=151014&action=edit
aliasing present at "100%" zoom
SUMMARY
When viewing an image, dragging the zoom slider to 100% shows artifacts.
However, if you set the zoom to the 100% preset, it shows the pixel-perfect
image. I have added a checkerboard from here
https://images.alphacoders.com/951/thumb-1920-951489.png for best viewing of
the bug.
STEPS TO REPRODUCE
1. Open the checkerboard image
2. Attempt to drag the slider to 100%
3. If you just miss it an end up at 99% or 102%, resize the window a little
4. Drag the slider back to the left and try dragging it to 100% again
5. Repeat 3-4 until you land on 100%
OBSERVED RESULT
Rectangle edges are jagged and aliasing despite the image supposedly being at
100% zoom.
EXPECTED RESULT
I suspect it isn't actually rounding the zoom value to the nearest integer,
just rounding the displayed amount. 100% should accurately reflect the preset
value of 100%.
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