Begin of proper multiscreen support!
We load configuration sets for the connected outputs. Each set of
screens represents a unique configuration. For that we use the md5
sum of the edid+connector as uuid of an output. Each of the md5 sums
is then used to create a uuid of the output set. We can be quite certain
that this will generate unique ids for the use cases we will face.
The uuids are used as group names. And from there we read the global
position.
The uuids are considered internal information. It is not intended for
users to configure manually in the config file. The intended way to
configure will be the OutputManagementInterface which recently got added
to KWayland. Once KWin applies a configuration it will store it to config
so that it can be loaded on next startup.
The configuration looks like:
[DrmOutputs][abcdef0123][0123abcdef]
Position=0,0
[DrmOutputs][abcdef0123][fbca3bcdef]
Position=1280,0
This is an example for two outputs set next to each other.
Reviewed-By: Sebastian Kügler
If an Output went into DPMS standby we need to re-enable the Output
once we get any input event.
For this we connect to the signals of InputRedirection once we go
to standby. Once we enable again, we disconnect (to not handle the
events all the time), blank the screen (initial modesetting) and
trigger a complete repaint.
During cleanup the KWayland::OutputInterface is already destroyed before
we hit the cleanup code of DrmOutput. Thus guard with a QPointer to not
delete twice.
Each of the backends becomes a plugin. This allows kwin_wayland to load
the requested plugin and kwin itself doesn't need to link all the
libraries needed. E.g. libdrm is no longer linked if running kwin_x11.
Also this allows to create backends for the non-standard EGL platforms
(examples could be raspberrypi or Android devices).
With this change all backends need to emit the screensQueried signal
at some point. So far only x11 backend did not provide the signal,
wayland had a comparable delayed init mechanism. Now all backends use
the same mechanism.
The aim is to be able to create a plugin for each of the backends.
The following directories are created:
* backends/drm
* backends/fbdev
* backends/wayland
* backends/x11
