CI meson-disable-options builds were failing with:
../hw/xwayland/xwayland-screen.c: In function ‘xwl_close_screen’:
../hw/xwayland/xwayland-screen.c:246:5: error: implicit declaration of
function ‘XaceDeleteCallback’; did you mean ‘DeleteCallback’?
[-Werror=implicit-function-declaration]
246 | XaceDeleteCallback(XACE_PROPERTY_ACCESS, xwl_access_property_callback, screen);
| ^~~~~~~~~~~~~~~~~~
| DeleteCallback
../hw/xwayland/xwayland-screen.c:246:24: error: ‘XACE_PROPERTY_ACCESS’
undeclared (first use in this function)
246 | XaceDeleteCallback(XACE_PROPERTY_ACCESS, xwl_access_property_callback, screen);
| ^~~~~~~~~~~~~~~~~~~~
../hw/xwayland/xwayland-screen.c: In function ‘xwl_screen_init’:
../hw/xwayland/xwayland-screen.c:1174:5: error: implicit declaration of
function ‘XaceRegisterCallback’ [-Werror=implicit-function-declaration]
1174 | XaceRegisterCallback(XACE_PROPERTY_ACCESS, xwl_access_property_callback, pScreen);
| ^~~~~~~~~~~~~~~~~~~~
../hw/xwayland/xwayland-screen.c:1174:26: error: ‘XACE_PROPERTY_ACCESS’
undeclared (first use in this function)
1174 | XaceRegisterCallback(XACE_PROPERTY_ACCESS, xwl_access_property_callback, pScreen);
| ^~~~~~~~~~~~~~~~~~~~
Fixes: a07c2cda9 ("xwayland: Add an XACE property access handler")
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
(cherry picked from commit 48acd1ae78)
(cherry picked from commit 3298b0a3e0)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2151>
Xwayland has its own XYToWindow() handler to account for the case when
the pointer leaves an X11 surface to enter another Wayland native
window.
When that occurs, Xwayland will treat it as if the pointer had entered
the root window so that the X11 clients receive an appropriate leave
event.
When the pointer leaves the X11 surface, Xwayland will call
CheckMotion() to update the sprite coordinates and possibly the cursor.
However, if we left the surface with a button down, it means the wayland
compositor has grabbed the pointer so we will not get button release
events from the compositor.
Once the button is released, Xwayland will get a pointer enter event from
the compositor, and Xwayland will clear up the buttons pressed.
But that might confuse Xwayland in thinking the pointer has crossed the
windows and leave the wrong cursor showing in the X11 surface.
To avoid the issue, if buttons are down, do not pretend the cursor has
left the X11 surface for the root window.
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1811
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 8cb078f8b6)
(cherry picked from commit 3c80595c7e)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2151>
InputOnly windows aren't relevant here.
E.g. mutter-x11-frames uses GTK4, which creates a 1x1 InputOnly child
window, which previously prevented this code from working as intended.
v2: (Olivier Fourdan)
* Rename output_child -> input_output_child.
* Add comment in get_single_input_output_child explaining why we return
NULL if input_output_child is already non-NULL.
(cherry picked from commit 6f31791945)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2076>
If the WM client reparents a window, mark the new parent as a WM window.
This helps with current mutter, where decoration windows are created by
a separate mutter-x11-frames client instead of the WM client. There
might be other compositors doing something similar now or in the future.
v2:
* Skip the whole unwrap-and-call-down dance in xwl_reparent_window if
xwl_screen->ReparentWindow is NULL.
(cherry picked from commit 105b5f2402)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2076>
Commit d36f66f15d ("Check for duplicate output names") would walk the
list of existing outputs and leases to check that no other existing
output has the same name.
The change however, inadvertently reused the regular screen outputs when
searching the leased names.
Fix this by using the lease name, not the regular output names that we
already checked just above.
Found by SAST tool Svace.
Fixes: d36f66f15d - xwayland: Check for duplicate output names
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1843
Reviewed-by Olivier Fourdan <ofourdan@redhat.com>
Signed-off-by: Mikhail Dmitrichenko <m.dmitrichenko222@gmail.com>
(cherry picked from commit b096785df4)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2076>
Commit 54f8fc4090 introduced the use of
wl_surface::set_buffer_scale, which is only available starting with
version 3 of the wl_compositor protocol. Because we already prefer
version 4 when available, this went unnoticed but broke versions 1, 2
and 3 when reaching the wl_surface::set_buffer_scale call.
This restores functionality for version 3 and properly document that
versions 1 and 2 are not supported anymore.
Signed-off-by: Nicolas Guichard <nicolas.guichard@kdab.com>
(cherry picked from commit bcc0587ab9)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2076>
The commit referenced below partially resolved an issue with grabs being made
on the root window. Unfortunately it assumes that the application uses
the same client for all windows. VMware Workstation uses nested windows
for each VM, each of which runs its own process with this own client.
Theses windows are managed by the GUI which is the top level for the
application and maps the windows based on which tab is selected.
Because the VM windows issue a grab on the root window and don't share
the same client as the GUI, grabs don't work properly with global shortcut
inhibition being completely broken.
Getting the parent top-level of the nested windows fixes this issue.
Fixes: c7730cfe55 ("xwayland: Translate keyboard grabs on the root window")
Signed-off-by: Ian Forbes <ian.forbes@broadcom.com>
(cherry picked from commit afc8b781d8)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2076>
Consider the following keymap:
```xkb
xkb_keymap {
xkb_keycodes {
<compose> = 135;
};
xkb_symbols {
key <compose> {
[ SetGroup(group = +1) ]
};
};
};
```
When the user presses the compose key, the following happens:
1. The compositor forwards the key to Xwayland.
2. Xwayland executes the SetGroup action and sets the base_group to 1
and the effective group to 1.
3. The compositor updates its own state and sends the effective group,
1, to Xwayland.
4. Xwayland sets the locked group to 1 and the effective group to
1 + 1 = 2.
This is wrong since pressing compose should set the effective group to 1
but to X applications the effective group appears to be 2.
This commit makes it so that Xwayland completely ignores the key
behaviors and actions of the keymap and only updates the modifier and
group components in response to the wayland modifiers events.
Signed-off-by: Julian Orth <ju.orth@gmail.com>
(cherry picked from commit 45c1d22ff6)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2060>
Xwayland dispatches tablet tool tip events immediately when they arrive.
With compositors such as mutter and sway, it is not an issue because
their libinput backends synthetize axis events before tip events. In
other words, axis data and the tip status belong to different frames.
On the other hand, kwin sends axis and tip events in a single frame
(its libinput backend generates a single tip event with axis data
attached to it). Since the tip events are dispatched immediately,
they can have wrong information associated with them, for example tool
position or pressure. It results in undesired "streaks" when the user
presses the tablet tool against the tablet.
See also https://bugs.kde.org/show_bug.cgi?id=479856.
Signed-off-by: Vlad Zahorodnii <vlad.zahorodnii@kde.org>
(cherry picked from commit 60f0bfe852)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/2041>
The cleanup function for GBM is called on the various error paths.
Once xwl_glamor_gbm_cleanup() has been called, GBM support is no longer
usable (and the corresponding data structures are freed), so there is
no way we can keep using GLAMOR after that point.
Make sure to explicitly disable GLAMOR support in that case, so we do
not crash later on trying to use GBM.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit e8784b7d89)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1766>
Consider the following keymap:
```xkb
xkb_keymap {
xkb_keycodes {
<compose> = 135;
};
xkb_symbols {
key <compose> {
[ SetGroup(group = +1) ]
};
};
};
```
When the user presses the compose key, the following happens:
1. The compositor forwards the key to Xwayland.
2. Xwayland executes the SetGroup action and sets the base_group to 1
and the effective group to 1.
3. The compositor updates its own state and sends the effective group,
1, to Xwayland.
4. Xwayland sets the locked group to 1 and the effective group to
1 + 1 = 2.
This is wrong since pressing compose should set the effective group to 1
but to X applications the effective group appears to be 2.
This commit makes it so that Xwayland completely ignores the key
behaviors and actions of the keymap and only updates the modifier and
group components in response to the wayland modifiers events.
Signed-off-by: Julian Orth <ju.orth@gmail.com>
(cherry picked from commit 45c1d22ff6)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1766>
Currently, Xwayland creates a pixmap backed by shared memory buffer as
soon as an X11 cursor is realized, which is destroyed when the cursor is
eventually unrealized.
If an X11 client is leaking cursors, Xwayland will be creating new
pixmaps continuously, which will eventually cause an error once the
limit is reached, and get Xwayland killed.
However, we do not need the shared memory buffer to stay around, we
already have the buffer retention mechanism which will take care of
keeping the buffer around until the Wayland compositor is done with it,
so we could just create and destroy the pixmap as needed when setting
the cursor.
That would not fix the leak in the X11 application, yet that would
mitigate the risk of Xwayland being killed by reaching the shared memory
limits, until the client itself reaches the limit of X11 resources.
v2: Don't increase the pixmap refcnt to destroy it just after (Michel)
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Suggested-by: Michel Dänzer <michel@daenzer.net>
See-also: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1773
(cherry picked from commit 8707d2835c)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1766>
eglCreateSyncKHR takes ownership of the file descriptor. Noticed by
inspection.
While we're at it, move the fence_fd declaration to the scope where
it's used.
Last but not least, close the fd in xwl_glamor_wait_fence when bailing
before calling eglCreateSyncKHR, and document that it takes ownership.
(cherry picked from commit 91b5a003a5)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1766>
using EGL (e.g., eglQueryString, epoxy_has_egl_extension)
before establishing this connection
enables the GBM/EGL implementation to potentially consume the
WAYLAND_SOCKET fd, which, if closed, will cause the compositor
to kill this xserver
(cherry picked from commit ff8ec59c97)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1702>
The vidmode extension emulation in Xwayland reports the modeline based
on the current mode.
To do so, it searches for the mode using `xwl_output_find_mode(-1, -1)`
which is supposed to return the current mode, whatever that mode is.
With XRandR emulation, in rootless mode, the default value is the mode
at index 0. That assumption, however is not true when running rootful.
That means that the vidmode extension will always return the highest
mode available, which is 5120x2880, with Xwayland running rootful:
$ xwayland-run -geometry 1024x768 -- xvidtune -show
"5120x2880" 1276.50 5120 5560 6128 7136 2880 2883 2888 2982 -hsync +vsync
Luckily, when Xwayland is running rootful, we have the current mode size
conveniently stored in dedicated fields of the xwayland output struct,
so we can use that to search for the right mode being used and report
that through the vidmode extension:
$ xwayland-run -geometry 1024x768 -- xvidtune -show
"1024x768" 63.50 1024 1064 1176 1328 768 771 775 798 -hsync +vsync
That fixes legacy games using the vidmode extension and rendering at the
wrong size when running within Xwayland rootful.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit e2e5842444)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1702>
The code here assumed a `leave` event always occurs between two `enter`
events. On Sway (and presumably other compositors) this happens even if
the client has destroyed the `wl_surface`, but the client gets a null
`surface` here. (Which presumably on on the wire is the id of the
destroyed surface.)
This seems like a bad thing to rely on, and is easy to avoid. But if
this is correct to assume, the Wayland protocol should be explicit about
this.
(cherry picked from commit 386b54fbe9)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
Now that we won't enable DRI3 if <sys/eventfd.h> is not available, there
is not point in trying to include that header without DRI3.
That allows to build Xwayland with GLAMOR enabled (without DRI3) on
platforms which do not support eventfd.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 23c295ea8b)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
Currently, we would start dequeuing events as soon as a device is
resumed, regardless of its capabilities.
If the capabilities are not available, we would just fallback to the
regular XTEST code path and not use input emulation.
As a result, it is very likely that we shall lose the first events until
the compositor resumes first a device with the requested capabilities.
To avoid that issue, start emulating only once we have the requested
capabilities, if they match the seat capabilities.
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1732
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 0525b9a5b9)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
This is a small code refactoring to help with clarity, simply move the
code from the switch case for device resume to a dedicated function.
No functional change.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 68ec297ee9)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
Currently, we would log only the event type, use the libei API to also
log the name in plain text, so we can quickly identify the events we're
missing out.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 1a42fe40d0)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
Since commit d370f1e58, Xwayland can optionally be started rootful and
fullscreen.
To do so, it will setup a viewport to scale the root window to match the
size of the output.
However, if the rootful Xwayland window receives an xdg-surface configure
event before the output definition is complete, as with e.g. the labwc
Wayland compositor, we might end up trying to setup a viewport with a
destination size of 0x0 which is a protocol violation, and that kills
Xwayland.
To avoid that issue, only setup the viewport if the output size is
meaningful.
Also, please note that once the output definition is complete, i.e. when
the "done" event is eventually received, we shall recompute the size for
fullscreen again, hence achieving the desired fullscreen state.
Fixes: d370f1e58 - xwayland: add fullscreen mode for rootful
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1717
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 66f5e7e96a)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
Clears -Wcalloc-transposed-args warnings from gcc 14.1, such as:
../dix/main.c:165:42: warning: ‘calloc’ sizes specified with ‘sizeof’ in the
earlier argument and not in the later argument [-Wcalloc-transposed-args]
165 | serverClient = calloc(sizeof(ClientRec), 1);
| ^~~~~~~~~
../dix/main.c:165:42: note: earlier argument should specify number of
elements, later size of each element
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
(cherry picked from commit 522f469fe9)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1635>
Since commit 792758fa ("xwayland: Update lost focus on deactivation"),
in rootful mode, if we receive an "activated" state from xdg-shell
indicating that the surface is no longer active, we shall end up calling
xwl_seat_leave_ptr().
But xwl_seat_leave_ptr() does not actually check whether the seat has
pointer capabilities, and if not, get_pointer_device() will return NULL.
As a result, we would crash using a NULL pointer in GetMaster(). This
typically can happen when using Xwayland rootful on headless compositors
such as "cage" which do not advertise any capabilities for the seat.
To avoid the issue, simply check whether get_pointer_device() returns a
valid non-null device and bail out early otherwise.
Fixes: 792758fa - xwayland: Update lost focus on deactivation
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1700
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 7203626173)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1592>
With explicit buffer synchronization in use, the window buffers use a
file descriptor for event notification to keep the buffer alive for
synchronization purpose.
When running rootful, the root window (which is visible) is destroyed
directly from the resource manager on server reset, and the window
buffer's eventfd will trigger after the window is destroyed, leading to
a use after free and a crash of the xserver.
To avoid the issue, check whether the window being destroyed is the root
window in rootless mode, and make sure to force the disposal of the
window buffers in that case.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1699
(cherry picked from commit a5e863963e)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
For cases (to come) where we would want to force the disposal of the
window buffers, add a parameter to force the disposal by calling
dispose() directly instead of maybe_dispose().
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit fa04e15afc)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
Right now, we would dispose the xwl_window and all the data associated
with it on unrealize.
But not all window destruction go through the unrealize code path, for
example when the root window (running rootful) is destroyed from the
resource manager on server reset, we do not get to the unrealize window
step, but straight to destroy window.
As a result, we are leaking the xwl_window and all the data associated
with it, for example:
| 65,536 bytes in 1 blocks are possibly lost in loss record 12,462 of 12,488
| at 0x484A0FC: calloc (vg_replace_malloc.c:1675)
| by 0x48B661C: UnknownInlinedFun (pixman-bits-image.c:1273)
| by 0x48B661C: _pixman_bits_image_init (pixman-bits-image.c:1296)
| by 0x48B6754: create_bits_image_internal (pixman-bits-image.c:1349)
| by 0x64180DE: UnknownInlinedFun (cairo-image-surface.c:380)
| by 0x64180DE: UnknownInlinedFun (cairo-image-surface.c:366)
| by 0x64180DE: cairo_image_surface_create (cairo-image-surface.c:432)
| by 0x6346B44: UnknownInlinedFun (libdecor-gtk.c:467)
| by 0x6346B44: libdecor_plugin_gtk_frame_new (libdecor-gtk.c:546)
| by 0x4B7F297: libdecor_decorate (libdecor.c:559)
| by 0x42C6F3: xwl_create_root_surface (xwayland-window.c:1266)
| by 0x42CD97: ensure_surface_for_window (xwayland-window.c:1466)
| by 0x42D0D1: xwl_realize_window (xwayland-window.c:1560)
| by 0x50858F: compRealizeWindow (compwindow.c:279)
| by 0x4FF2A2: MapWindow (window.c:2706)
| by 0x4F9E7F: InitRootWindow (window.c:697)
To avoid that issue, check whether there is still an xwl_window
associated with the X11 window on destroy, and if that's the case,
dispose the xwl_window.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 0e1a98f52f)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
The wp_linux_drm_syncobj_v1 protocol states that :
| If at surface commit time there is a pending buffer attached but no
| pending release timeline point set, the no_release_point protocol
| error is raised.
So we need to set a release timeline point in any case from the swap
pixmap routine, even for the early out code paths.
Failing to do so may cause a Wayland protocol error that is fatal to the
Wayland client, in this case Xwayland:
| wp_linux_drm_syncobj_surface_v1: error 4: No Acquire point provided
| (EE) failed to dispatch Wayland events: Protocol error
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1688
Fixes: 87bf2cafcc - xwayland: add support for wp_linux_drm_syncobj_v1
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit bc9bf56360)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
Move the code which takes care of submitting pixmaps and the
synchronization points to its own function.
This will allow to reuse that code from different code path.
No functional change intended.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 33330f0dc9)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
The function xwl_window_swap_pixmap() can be called from two places,
either from xwl_window_attach_buffer() or from damage_report().
When called from xwl_window_attach_buffer(), the new buffer is attached
and the surface committed.
However, when called from damage_report(), a new buffer might not be
attached before the surface is committed.
That's fine with implicit synchronization, but if we use explicit
synchronization, committing a surface without a new buffer attached but
with a release timeline point set is a protocol error:
| If at surface commit time there is a pending release timeline point
| set but no pending buffer attached, a no_buffer error is raised.
To avoid such an issue, add a new parameter to xwl_window_swap_pixmap()
to hint whether it should set the synchronization points, and have the
synchronization points set only from xwl_window_attach_buffer().
v2: Rename param to handle_sync (Michel)
Suggested-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit aab01c7391)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
Now that we have the buffer synchronization implemented in the
GLAMOR/GBM code, switch to use that code.
At this point, there is still not functional change intended, this is
still preparation work for a fix that is still to come.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit 256cef8b20)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
Copy the code to deal with synchronization objects from the window
buffers to the GLAMOR/GBM code.
The idea is to deal with synchronizations for all pixmaps, even when
there is no window buffer involved.
This is still preparation work for the following commits, no functional
change intended at this point.
v2: Use a "xwl_window_buffer *" instead of a "void *data" (Michel)
v3: Bail early if there's no xwl_window_buffer (Michel)
v4: Rename xwl_window_submit_pixmap() to
xwl_glamor_gbm_wait_release_fence() (Michel)
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit cc021aca99)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
We want to decorrelate the explicit buffer synchronization from the
window buffers, and move that to the GLAMOR/GBM code instead.
To do that, we need to be able to invoke the xwl_window_buffer's
release_callback() routine from outside the window buffer code.
For that purpose, introduce xwl_window_buffer_release() which calls
xwl_window_buffer_release_callback() for us.
This is preparation work for the following changes, no functional change
intended at this point.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
(cherry picked from commit b5082073b0)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
If a child window of the same size is unmapped, we should stop walking
the tree looking for the surface window to use.
Whatever lies beneath is not visible anyway.
This also fixes an issue with the Damage list becoming corrupted when
destroying a window, because the first thing that DeleteWindow() does
is to unmap the window and crush the window tree underneath it.
Signed-off-by: Olivier Fourdan <ofourdan@redhat.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Fixes: 3a0fc268 - xwayland: Add xwl_window::surface_window
Closes: https://gitlab.freedesktop.org/xorg/xserver/-/issues/1680
(cherry picked from commit 32e16082c5)
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1569>
