<s>
KWin	B-Language
is	O
a	O
window	B-Application
manager	I-Application
for	O
the	O
X	B-Operating_System
Window	I-Operating_System
System	I-Operating_System
and	O
a	O
Wayland	B-Language
compositor	O
.	O
</s>
<s>
It	O
is	O
released	O
as	O
a	O
part	O
of	O
KDE	B-Language
Plasma	I-Language
5	I-Language
,	O
for	O
which	O
it	O
is	O
the	O
default	O
window	B-Application
manager	I-Application
.	O
</s>
<s>
KWin	B-Language
can	O
also	O
be	O
used	O
on	O
its	O
own	O
or	O
with	O
other	O
desktop	O
environments	O
.	O
</s>
<s>
KWin	B-Language
can	O
be	O
configured	O
by	O
scripting	O
using	O
QML	B-Language
or	O
QtScript	B-Language
,	O
both	O
of	O
which	O
are	O
based	O
on	O
ECMAScript	B-Language
.	O
</s>
<s>
Name	O
Version	O
Details	O
KWM	O
1.0	O
KWin	B-Language
2.0	O
Extended	O
support	O
for	O
themes	O
and	O
window	O
effects	O
.	O
</s>
<s>
3.0	O
Improved	O
support	O
for	O
the	O
extended	O
ICCCM	B-Operating_System
standards	O
from	O
freedesktop.org	O
.	O
</s>
<s>
4.0	O
Compositing	B-Operating_System
support	O
and	O
Compiz-like	O
effects	O
.	O
</s>
<s>
4.11	O
Last	O
release	O
based	O
on	O
KDE	B-Language
Platform	I-Language
4	I-Language
.	O
</s>
<s>
Experimental	O
Wayland	B-Language
support	O
.	O
</s>
<s>
5.0	O
First	O
release	O
based	O
on	O
KDE	B-Language
Frameworks	I-Language
5	I-Language
and	O
Qt	O
5.5.12	O
Released	O
February	O
2018	O
,	O
KWin/X11	O
got	O
feature	O
frozen	O
,	O
meaning	O
no	O
new	O
X11	B-Operating_System
specific	O
features	O
will	O
be	O
added	O
.	O
</s>
<s>
Martin	O
Flöser	O
stated	O
that	O
new	O
features	O
are	O
easy	O
and	O
straight	O
forward	O
with	O
the	O
Wayland	B-Language
back-end	O
,	O
but	O
require	O
considerably	O
more	O
development	O
to	O
add	O
the	O
same	O
feature	O
to	O
the	O
X11	B-Operating_System
back-end	O
.	O
</s>
<s>
There	O
are	O
many	O
window	O
decorations	O
for	O
KWin	B-Language
,	O
including	O
the	O
current	O
default	O
Breeze	O
(	O
shown	O
below	O
)	O
,	O
the	O
previous	O
default	O
Oxygen	O
,	O
Microsoft	O
Windows-like	O
Redmond	O
,	O
and	O
Keramik	O
.	O
</s>
<s>
Currently	O
available	O
compositing	B-Operating_System
backends	O
include	O
OpenGL	O
1.2	O
,	O
OpenGL	O
2.0	O
,	O
OpenGL	O
3.1	O
and	O
OpenGL	O
ES	O
2.0	O
.	O
</s>
<s>
As	O
of	O
KDE	B-Application
4.3	O
the	O
following	O
effects	O
are	O
built-in	O
:	O
</s>
