https://bugs.kde.org/show_bug.cgi?id=389298
David Gow <da...@ingeniumdigital.com> changed:
What |Removed |Added
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CC| |da...@ingeniumdigital.com
--- Comment #9 from David Gow <da...@ingeniumdigital.com> ---
This sounds like it's a well-known issue with the game / SDL's understanding of
rendering to buffers with alpha channels.
Basically, on X11 the alpha channel was ignored, and on Wayland it's used (to
be able to provide nicely alpha-blended windows with interesting shapes, etc).
There's been an EGL extension proposed to allow SDL to request the alpha
channel is ignored:
https://www.khronos.org/registry/EGL/extensions/EXT/EGL_EXT_present_opaque.txt
SDL already has support for this extension, though it's not yet part of a
release:
https://github.com/libsdl-org/SDL/pull/4646
There's an in-progress implementation for Mesa:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12373
So I doubt this is actually a KWin bug, but I could be wrong…
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