This allows KWin to securely identify the client for a given connection,
without relying on the process name.
This patch does not do anything meaningful with the application ID other
than store it.
This first version does not support kwin restarts, it can come
afterwards.
Testing done:
With latest flatpak, running `WAYLAND_DEBUG=1 flatpak run org.telegram.desktop |& grep security`
shows that flatpak itself bound the security context, and the client did not see it advertised.
ClientBufferIntegration was introduced to work around the fact that some
client buffers are not created by us.
In addition to that, DisplayPrivate::registerClientBuffer() was
introduced to register client buffers created by us.
This change get rids of the ClientBufferIntegration type and further
simplifies the ClientBuffer type to make wayland-specific client buffer
code less messier.
As of nowadays, most clients have switched to the linux-dmabuf protocol,
except Xwayland, which still needs the wl-drm protocol.
On the other hand, we would like to unify some buffer handling code.
There are a few options:
- drop the support for wl-drm protocol. Not doable, because Xwayland
still needs it, even though it uses the linux dmabuf feedback protocol
too
- re-implement the wl-drm protocol
- re-implement the minimal part of the wl-drm protocol needed by
Xwayland
This change goes after the third option. Only the node name and the
capabilities will be sent. The buffer factory requests are not
implemented, but they can be if we discover that some clients need them.
Currently, the BufferInterface encapsulates all the kinds of client
buffers. This has become a somewhat annoying issue as we want to
reference the shm pool if a shm buffer is destroyed, or have custom
buffer readiness logic for linux dma-buf client buffers.
Implementing all of that with the current abstractions will be
challenging as there's no good separation between different client
buffer types.
This change splits the BufferInterface class in three sub-classes -
DrmClientBuffer, LinuxDmaBufV1ClientBuffer, and ShmClientBuffer.
In addition to that, this change fixes the broken buffer ref'ing api.
The main reason why we have factory methods is that up to some point,
kwayland had its own signal to indicate when globals have to be removed.
Now that all globals add destroy listeners for the wl_display object,
we don't have that signal. Most factory methods are equivalent to doing
new T(display).
Besides adding unnecessary boilerplate code, another reason to get rid
of the factory methods is to reduce the amount of merge conflicts. If
several persons work on implementing wayland protocols at the same time,
sooner or later someone will have to resolve merge conflicts in Display.
