[systemsettings] [Bug 408215] Preview of icon themes is blurry when fractional display scaling is used

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=408215

--- Comment #5 from Nate Graham <nate at kde.org> ---
Photographs are much less sensitive to upscaling/downscaling blurriness because
of the nature of what's being phorographed. By contrast, the effect is
noticeable even with excellent scaling algorithms for graphics which are
designed to be pixel-perfect--for example those which make heavy use of
single-pixel lines. There is on algorithm I'm aware of that can make a
single-pixel line that perfectly falls on physical pixels look good when scaled
1.5x, because there aren't fractional pixels. There may be fractional
sub-pixels, but those cannot be used in the same way.

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