Kwin Maintainers Approval for Rounding Bottom Corners

[Niccolò Venerandi of KDE]

After discussing with some members of the VDG, I understand the performance
concerns. I agree we should choose performance over rounded corners. Thank
you Vlad for the clear reply!

Il lun 28 giu 2021, 20:25 Vlad Zahorodnii <vlad.zahorodnii at kde.org> ha
scritto:

> On 6/28/21 12:25 PM, Martin Flöser wrote:
> > Am Samstag, 26. Juni 2021, 00:25:29 CEST schrieb Aleix Pol:
> >> Are you sure this is something that needs tackling at KWin level? if
> KWin
> >> cuts down there's the possibility that an app might get cut off. An
> >> application (e
> >> g. at kirigami level) could decide though to have round corners by
> offering
> >> a transparent mask. Would that be more in line with what you are after?
> >
> > I absolutely agree with Aleix here. This is nothing a window manager
> should
> > do. This can break applications in horrible and unexpected ways. Please
> do not
> > go down this route. We do not know what the application draws and how it
> > interacts with the window - where there are controls, etc.
>
> Right, besides the technical issues with client-side decorated
> applications, rounding corners on the compositor side will effectively
> kill optimizations such as directly scanning out sub-surfaces on
> hardware planes. The compositor will be forced to perform compositing.
>
> It's totally understandable why VDG wants the bottom window corners be
> rounded by the compositor, but it's simply not possible due to various
> technical reasons.
>
> Cheers,
> Vlad
>
> > Just imagine a video application without borders and you cut off pixels
> or a
> > virtual machine where the virtualized operating system is not square.
> >
> > If you want to do design, please do it in parts of your design. Don't
> force it
> > on apps which are not controlled by us. And if we do it only for our
> > controlled apps the better place to implement it, is in the apps or
> Breeze
> > style.
> >
> > Cheers
> > Martin
> >
> >
>
>
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