KWin requires the xcb plugin otherwise KWin crashes when the first
xcb/xlib code is called. First KWin tries to set the QT_QPA_PLATFORM
to "xcb", but that doesn't protect against the command line switch.
Thus KWin also verifies that after constructing the QGuiApplication
the platform name is set to xcb, if not it exits gracefully with a
useful error message instead a crash.
To make that work the KWinSelectionOwner has to be changed to a
pointer and be delayed constructed, otherwise the crash already happens
in the KSelectionOwner.
Furthermore a small sanity check on the plugin is performed by checking
whether KWin can get the XDisplay from the QPA. If not it means that the
QPA plugin was compiled with -no-xcb-xlib which KWin doesn't support, it
still uses XLib at various places. If KWin doesn't get the Display, it
exits gracefully with a clear error message.
CCBUG: 331880
REVIEW: 116669
Picked Wayland by default instead of X11 causing KWin to abort
startup if there is no Wayland backend.
Important lesson: test your changes also on X11 and not just on
Wayland!
In the Wayland world we need to have a compositor. This means we have to
enforce that the compositor is running. If the setup fails we have to
quit, because it doesn't make any sense any more to be running.
A new method requiresCompositing() is added to the Application. If it
returns true the useCompositing option will always return true and the
unredirect fullscreen option will always return false. That way
compositing is enforced at startup and cannot end by unredirecting.
In addition this method is checked if actions are performed which would
suspend compositing. E.g. the shortcut to toggle compositing. Restarting
the compositor is still possible in order to change the selected
compositing backend without a restart. But if it fails KWin will quit.
Returns true if the OperationMode requires KWin to composite to a
Wayland surface. This replaces the checks for the WaylandBackend or env
variable used so far in the construction of the Scene.
This enum describes how KWin is operating with the available windowing
systems. By default KWin is using the OperationModeX11, but if the
Wayland backend gets started KWin is using the OperationModeWaylandAndX11
This will be extended in future when XWayland and Wayland only become
viable options.
Instead we generate an export header for kdeinit_kwin and use it
to declare the KWIN_EXPORT. With this change our libs don't include
any KDE4Support headers any more. One step closer to no KDE4Support.
Replaced by KWIN_VERSION_STRING where useful. Support information
no longer contains the SC version number. We have to see whether
there will be a useful framework based platform information.
The main purpose of the opengl testapp was to set the environment
variable LIBGL_ALWAYS_INDIRECT if direct rendering is not supported
before glx gets initialized.
With Qt5 we may no longer set this environment variable. QtQuick
requires direct rendering. On IvyBridge QtQuick is crashing if the
variable is set. Thus we are no longer allowed to set it and thus the
complete test becomes pointless.
The test app basically whitelisted most drivers anyway, the only
drivers which were problematic are the proprietary Catalyst drivers.
It that's still a problem we can also disable OpenGL compositing on
those drivers through the recommendation in the GLPlatform.
This also means that the KWIN_DIRECT_GL variable is no longer useful.
The variable is set not from config nor anywhere else when kwin is
started through ksmserver by startkde.
In addition the KGlobal implementation is twisted compared to the kcminit
config behavior (the config value defaults to true, not false - ie. if the
variable isn't set (by kcm init) it's reasonable to assume true either.
Therefore and in alignment with PW/2, the environment is read directly and
on absence resolved to "true".
To control the behavior, please export KDE_MULTIHEAD=true/false before starting KWin
(eg. in /usr/bin/startkde)
This reverts commit ab6d5c048a25bcb2f5bdb822ba3eda64019c61bc.
REVIEW: 112579
CCBUG: 256242
During startup we only create the request, the reply will be fetched
once the atom is needed.
To make proper use of this async behavior the creation of Atoms is
moved directly to the claim of the manager selection, so they can be
fetched while we wait for the previous manager selection to give up
on it.
The crash count checking does not depend on whether or not we will
be able to claim the window manager selection. As claiming the selection
can take up to one second we should try to get as many checks which do
not depend on it out.
KSessionManager is deprecated and there is no replacement yet. So
let's get rid of the warnings for now. Needs to be re-added once
there is a working QSessionManager again.
Done in one step as it requires changes which are better suited with a
QApplication.
To not need to parte the QCommandLineParser around the needed arguments
are added to the KWin::Application through setters and the crash count
is available through a static getter/setter pair.
Wrapped in xcbutils.
In addition the check whether another WM is running in main.cpp is
improved by doing a checked request and directly checking for the
error. If there is an error, KWin puts out an error message and
quits.
Forwards all xcb events to Workspace::workspaceEvent() which got changed
to process xcb events instead of XEvents. So far all handling is
disabled. Will be re-enabled step by step in the following patches.
We need to connect to this signal instead of waiting for it to time out.
This means we are already starting the window manager while it might be
that we fail.
* "" needs to be wrapped in QStringLiteral
* QString::fromUtf8 needed for const char* and QByteArray
* QByteArray::constData() needed to get to the const char*
Martin Gräßlin