https://bugs.documentfoundation.org/show_bug.cgi?id=115439

--- Comment #52 from V Stuart Foote <[email protected]> ---
(In reply to Renato S. Yamane from comment #51)
> Just to remember this bug was happening also at 100% scale as you can see on
> the Ckmment below with an screenshot:
> 
> https://bugs.documentfoundation.org/show_bug.cgi?id=117158#c4
> 
> I cannot test anymore, because I switched back to MS Office.

That was never confirmed and in the screen clips provided the LO icons are
clearly not 100% or 150% of the native FHD mode--they've been scaled poorly.

The Yoga L380 in use does have a native screen DPI of ~165dpi, so believe it
does scale the PNG icons to a higher scale--look in
%APPDATA%\LibreOffice\4\cache\Colibre and if 150 shows the PNG rasters were
scaled larger (with the pixilation noted). 

To avoid similar on HiDPI displays close to this resolution, *simply* make a
selection of an SVG based icon theme. Do not use the default PNG based icon
theme.

Anyhow, the set of pre-installed non-SVG icon themes render cleanly from 100 to
150 pct scaling, starting to pixelate above 150 pct. If on a HiDPI display, or
working at higher scaling 150 - 300% first use Tools -> Options -> View and
switch to the bundled SVG icon sets which will then be resampled into clean PNG
sized as needed.

A useful enhancement at this point might be to detect and switch from the PNG
icon themes to SVG theme when at a higher scaling factor is in use--i.e. avoid
scaling the PNG.

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