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Erik Kurzinger f294e7a035 Call frameRendered for undamaged Wayland surfaces Currently, if a Wayland surface registers a frame callback but does not send a damage event, the callback will not be serviced even after KWin has completed a compositing cycle and is therefore ready to render a new frame for the surface. Since some clients, including any using NVIDIA's Wayland EGL implementation, wait for frame events before preparing each frame this behavior can result in hangs if a compositing cycle occurs between registering the frame callback and sending the damage event. Instead, in accordance with the Wayland specification, frame callbacks should be serviced (via KWayland::Server::SurfaceInterface::frameRendered) for all visible windows - not just those damaged since the last compositing cycle.		6 years ago
autotests	[autotests] Untangle ShellClient::testMaximizedToFullscreen	6 years ago
cmake/modules	…
colorcorrection	…
data	…
decorations	…
doc	…
effects	Add windowsystem plugin for KWin's qpa	6 years ago
helpers	…
kcmkwin	…
kconf_update	…
libinput	…
libkwineffects	Switch ThumbnailItem to internal uuid instead of WId	6 years ago
packageplugins	…
platformsupport	…
plugins	Add windowsystem plugin for KWin's qpa	6 years ago
qml	…
scripting	Fix reorder warning in AbstractScript	6 years ago
scripts	…
shaders	…
tabbox	Silence warnings in TabBoxHandler	6 years ago
tests	…
.arcconfig	…
.arclint	…
16-apps-kwin.png	…
32-apps-kwin.png	…
48-apps-kwin.png	…
CMakeLists.txt	…
COPYING	…
COPYING.DOC	…
ExtraDesktop.sh	…
HACKING.md	…
KWinDBusInterfaceConfig.cmake.in	…
Mainpage.dox	…
Messages.sh	…
README.md	…
TESTING.md	…
abstract_client.cpp	…
abstract_client.h	…
abstract_opengl_context_attribute_builder.cpp	…
abstract_opengl_context_attribute_builder.h	…
abstract_output.cpp	…
abstract_output.h	…
activation.cpp	…
activities.cpp	…
activities.h	…
appmenu.cpp	…
appmenu.h	…
atoms.cpp	…
atoms.h	…
client.cpp	…
client.h	…
client_machine.cpp	…
client_machine.h	…
composite.cpp	Call frameRendered for undamaged Wayland surfaces	6 years ago
composite.h	…
config-kwin.h.cmake	…
cursor.cpp	…
cursor.h	…
dbusinterface.cpp	…
dbusinterface.h	…
debug_console.cpp	…
debug_console.h	…
debug_console.ui	…
deleted.cpp	…
deleted.h	…
effectloader.cpp	…
effectloader.h	…
effects.cpp	Switch ThumbnailItem to internal uuid instead of WId	6 years ago
effects.h	Switch ThumbnailItem to internal uuid instead of WId	6 years ago
egl_context_attribute_builder.cpp	…
egl_context_attribute_builder.h	…
events.cpp	…
fixqopengl.h	…
focuschain.cpp	…
focuschain.h	…
geometry.cpp	…
geometrytip.cpp	…
geometrytip.h	…
gestures.cpp	…
gestures.h	…
globalshortcuts.cpp	…
globalshortcuts.h	…
group.cpp	…
group.h	…
idle_inhibition.cpp	…
idle_inhibition.h	…
input.cpp	…
input.h	…
input_event.cpp	…
input_event.h	…
input_event_spy.cpp	…
input_event_spy.h	…
keyboard_input.cpp	…
keyboard_input.h	…
keyboard_layout.cpp	…
keyboard_layout.h	…
keyboard_layout_switching.cpp	…
keyboard_layout_switching.h	…
keyboard_repeat.cpp	…
keyboard_repeat.h	…
killwindow.cpp	…
killwindow.h	…
kwin.kcfg	…
kwin.notifyrc	…
kwinbindings.cpp	…
lanczosfilter.cpp	…
lanczosfilter.h	…
layers.cpp	…
logind.cpp	remove superfluous code	6 years ago
logind.h	…
main.cpp	…
main.h	…
main_wayland.cpp	…
main_wayland.h	…
main_x11.cpp	…
main_x11.h	…
manage.cpp	…
modifier_only_shortcuts.cpp	…
modifier_only_shortcuts.h	…
moving_client_x11_filter.cpp	…
moving_client_x11_filter.h	…
netinfo.cpp	…
netinfo.h	…
onscreennotification.cpp	…
onscreennotification.h	…
options.cpp	…
options.h	…
org.freedesktop.ScreenSaver.xml	…
org.kde.KWin.VirtualDesktopManager.xml	…
org.kde.KWin.xml	…
org.kde.kappmenu.xml	…
org.kde.kwin.ColorCorrect.xml	…
org.kde.kwin.Compositing.xml	…
org.kde.kwin.Effects.xml	…
org.kde.kwin.OrientationSensor.xml	…
orientation_sensor.cpp	…
orientation_sensor.h	…
osd.cpp	…
osd.h	…
outline.cpp	…
outline.h	…
outputscreens.cpp	…
outputscreens.h	…
overlaywindow.cpp	…
overlaywindow.h	…
placement.cpp	…
placement.h	…
platform.cpp	…
platform.h	…
pointer_input.cpp	…
pointer_input.h	…
popup_input_filter.cpp	…
popup_input_filter.h	…
resources.qrc	…
rootinfo_filter.cpp	…
rootinfo_filter.h	…
rules.cpp	…
rules.h	…
sc-apps-kwin.svgz	…
scene.cpp	…
scene.h	…
screenedge.cpp	…
screenedge.h	…
screenlockerwatcher.cpp	…
screenlockerwatcher.h	…
screens.cpp	…
screens.h	…
settings.kcfgc	…
shadow.cpp	…
shadow.h	…
shell_client.cpp	Add windowsystem plugin for KWin's qpa	6 years ago
shell_client.h	Trim whitespace	6 years ago
shortcutdialog.ui	…
sm.cpp	…
sm.h	…
tabgroup.cpp	…
tabgroup.h	…
tabletmodemanager.cpp	…
tabletmodemanager.h	…
thumbnailitem.cpp	Switch ThumbnailItem to internal uuid instead of WId	6 years ago
thumbnailitem.h	Switch ThumbnailItem to internal uuid instead of WId	6 years ago
toplevel.cpp	…
toplevel.h	…
touch_hide_cursor_spy.cpp	…
touch_hide_cursor_spy.h	…
touch_input.cpp	…
touch_input.h	…
udev.cpp	…
udev.h	…
unmanaged.cpp	…
unmanaged.h	…
useractions.cpp	…
useractions.h	…
utils.cpp	…
utils.h	…
virtual_terminal.cpp	…
virtual_terminal.h	…
virtualdesktops.cpp	Send done event after the number of rows has been changed	6 years ago
virtualdesktops.h	…
virtualdesktopsdbustypes.cpp	…
virtualdesktopsdbustypes.h	…
virtualkeyboard.cpp	…
virtualkeyboard.h	…
virtualkeyboard_dbus.cpp	…
virtualkeyboard_dbus.h	…
was_user_interaction_x11_filter.cpp	…
was_user_interaction_x11_filter.h	…
wayland_cursor_theme.cpp	…
wayland_cursor_theme.h	…
wayland_server.cpp	Name Wayland socket automatically when no socket name was specified	6 years ago
wayland_server.h	…
window_property_notify_x11_filter.cpp	…
window_property_notify_x11_filter.h	…
workspace.cpp	…
workspace.h	…
x11eventfilter.cpp	…
x11eventfilter.h	…
xcbutils.cpp	…
xcbutils.h	…
xkb.cpp	…
xkb.h	…
xkb_qt_mapping.h	…

README.md

KWin

KWin is an easy to use, but flexible, composited Window Manager for Xorg windowing systems (Wayland, X11) on Linux. Its primary usage is in conjunction with a Desktop Shell (e.g. KDE Plasma Desktop). KWin is designed to go out of the way; users should not notice that they use a window manager at all. Nevertheless KWin provides a steep learning curve for advanced features, which are available, if they do not conflict with the primary mission. KWin does not have a dedicated targeted user group, but follows the targeted user group of the Desktop Shell using KWin as it's window manager.

KWin is not...

a standalone window manager (c.f. openbox, i3) and does not provide any functionality belonging to a Desktop Shell.
a replacement for window managers designed for use with a specific Desktop Shell (e.g. GNOME Shell)
a minimalistic window manager
designed for use without compositing or for X11 network transparency, though both are possible.

Contacting KWin development team

mailing list: kwin@kde.org
IRC: #kwin on freenode

Support

Application Developer

If you are an application developer having questions regarding windowing systems (either X11 or Wayland) please do not hesitate to contact us. Preferable through our mailing list. Ideally subscribe to the mailing list, so that your mail doesn't get stuck in the moderation queue.

End user

Please contact the support channels of your Linux distribution for user support. The KWin development team does not provide end user support.

Reporting bugs

Please use KDE's bugtracker and report for product KWin.

Developing on KWin

Please refer to hacking documentation for how to build and start KWin. Further information about KWin's test suite can be found in TESTING.md.

Guidelines for new features

A new Feature can only be added to KWin if:

it does not violate the primary missions as stated at the start of this document
it does not introduce instabilities
it is maintained, that is bugs are fixed in a timely manner (second next minor release) if it is not a corner case.
it works together with all existing features
it supports both single and multi screen (xrandr)
it adds a significant advantage
it is feature complete, that is supports at least all useful features from competitive implementations
it is not a special case for a small user group
it does not increase code complexity significantly
it does not affect KWin's license (GPLv2+)

All new added features are under probation, that is if any of the non-functional requirements as listed above do not hold true in the next two feature releases, the added feature will be removed again.

The same non functional requirements hold true for any kind of plugins (effects, scripts, etc.). It is suggested to use scripted plugins and distribute them separately.