https://bugs.kde.org/show_bug.cgi?id=433269
Tom B <t...@r.je> changed:
What |Removed |Added
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CC| |t...@r.je
--- Comment #2 from Tom B <t...@r.je> ---
The issue isn't entirely fractional scaling and half pixels. Even at 200% there
are a number of issues with the scaling option.
Firstly there are odd minor issues like the mouse cursor looks incredibly
blocky. There is a separate option for setting the cursor resolution and
zooming the pixels doesn't pick the larger image. UI elements are scaled, some
icons look OK, some look blown up. Fonts in certain UI elements aren't scaled
(drop down boxes on wayland).
The showstopper for me though, is that I can't view 4k videos or images on my
4k screen. If I view a 3840x2160 image in Firefox with 200% display scaling I
have a choice: See 1/4 of it cropped with scrollbars or view it scaled to
1080p. I cannot see the whole image untouched. If I view a 4k video it gets
scaled down to 1080p if I have 200% scaling. The scaling option isn't much
better than just running my screen at a 1080p resolution. Text and some icons
are better but nothing else.
It might be possible for individual applications to support scaling properly
but at the moment Firefox, VLC nor mpv do this, and enabling scaling shouldn't
really limit the user's choice of applications.
I have a choice of either reading text on the screen at a legible size or being
able to view a 4k video on a 4k screen. This forced choice seems to be by
design. The whole screen scaling approach seems like the wrong way to go to me
as it introduces its own set of problems and limitations on the user.
What's frustrating is that in Xorg, setting DPI works near perfectly. The UI is
scaled, icons are scaled, context menus are scaled and I can view images and
videos without them being scaled unless I want them to. The only issue is that
some windows start fairly small. But at least they can be resized easily.
Even when you reintroduce this option on Wayland, it wasn't ever working
properly there. Fonts are scaled but padding around text, borders and other UI
elements are completely ignored. Would it be possible to copy over the Xorg
code that scales the UI and Icons based on DPI from Xorg to Wayland?
For example, try setting font DPI to 192 and launching Rhythmbox or Dolphin. On
Xorg looks great, on wayland everything is crashed together because the
paddings around text and icons are not increased relative to the text size.
So at the moment, as much as I'd like to use Wayland I'm stuck on Xorg because
neither DPI or scaling work without issues.
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