https://bugs.documentfoundation.org/show_bug.cgi?id=115439
V Stuart Foote <vstuart.fo...@utsa.edu> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|High DPI mode: SVG icons |High DPI mode: SVG icons
|should be preferred over |should be preferred over
|PNG versions when available |PNG versions when available
| |(comment 34)
--- Comment #45 from V Stuart Foote <vstuart.fo...@utsa.edu> ---
(In reply to bugzilla2 from comment #44)
> Ok,time for an update here too :)
> I use SVG-Icons quite a long time now, and for me those always look better
> than the png versions. I just did an comparison, and the png-version really
> looks terrible on an high-dpi monitor with 175% scale.
>
> As far as I remember, SVG primarily was an issue on Linux? So can't we just
> make SVG default on Windows?
Not at all!
There is no means currently to directly render the SVG into the GUI, meaning
they will always be rendered to a bitmap and held in config (per user profile)
for the display resolution in use. Look in %APPDATA%\LibreOffice\4\cache for
the entire SVG icon theme rendered to PNG at scale. For performance the entire
SVG of the active icon theme is parsed and the corresponding PNGs built on
first launch.
The project deploys resolution appropriate 100% (so 96pdi) scaled PNG at three
icon sizes small (sc 16x16) large (lc 24x24) and extra large (32 32x32). They
are hand lay ups from the source SVG. They render correctly for most
non-HDPI/non-scaledUI and remain appropriate for UI or os/DE scaling up to
about 150%. They then start to look pixelated at 150% or above. Since
96-120dpi displays remains the norm for the vast majority of users there is no
justification for doing more with the SVG.
Only if your os/DE is being scaled (as response to HiDPI, or by user setting)
does it make sense to use SVG. Do it manually, the automated resampling and
rendering of the SVG is inferior to the system deployed PNG at the default
100%, i.e. 96dpi resolution. The mechanism for "detection" of HiDPI (and so
automated use of a resampled set of SVG icons)is "thresholded" at 168 dpi.
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