`meta_surface_actor_is_obscured_on_stage_view` currently fails to
account for non-identity scaling of actor size (e.g. window actor
geometry scale or surface pixel alignment).
Fix this by using the new `meta_region_apply_matrix_transform_expand` to
calculate the unobscured region in stage coordinates.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2726>
This allows MetaCullable to work with actors using arbitrary transforms
which will be needed for implementing surface pixel alignment for
fractional-scale-v1.
This also deletes meta_cullable_is_untransformed as it's no longer
necessary, and we can also stop manually scaling the region objects
while performing opaque region culling in surfaces since it's now
handled transparently by the new `meta_cullable_cull_out_children`
implementation.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2726>
Implement the stable rounding algorithm as described in the discussions
for the fractional-scale-v1 protocol.
This adds an override of the ClutterActor::apply_transform vfunc for
MetaSurfaceActorWayland that ensures the size and position of the
contents of the surface are rounded according to the stable rounding
algorithm.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2726>
Always ensure that the MetaSurfaceContainerActorWayland is aligned to physical
pixel boundary in preparation for fractional-scale-v1 protocol support.
This introduces an override of ClutterActor::apply_transform vfunc for
MetaSurfaceContainerActorWayland that always ensures the actor content is aligned
to physical pixel boundary.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2726>
A failing allocation is non-fatal here, however if it fails later in a
lazy allocation triggered by `cogl_framebuffer_create_timestamp_query()`
we end up crashing. Thus force the allocation early, like we already do
in other places.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3004>
While it's obviously good to trap possible errors from X calls, we are
mixing the Clutter error trap with the MetaX11Display one for these
calls.
This may result in situations where a X call within a Clutter error
trap fails, but it's actually handled in these sections using the
MetaX11Display error trap. This one will consider the serial out
of the "handled" parts and raise an error.
It is better to stay consistent here, and use the same error traps
than the rest of the X11 backend.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2796
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3002>
When the X11 display is actually XWayland there's no point to delay the
compositor selection, given that mutter itself is the compositor and
doing this may cause the first X11 client that starts not to receive the
right information (and in some cases misbehave).
Since some toolkits are not handling the compositor selection changes
properly at later times, let's make their life easier by just
initializing the selection as early as the other X11 properties, given
that in this case there's nothing to replace.
Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2472
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2970>
Since c390f70edc ("backend: Set up and use ownership chains")
the type of the ClutterInputDevice object's "meta-input-settings-xdevice"
data is `DeviceHandle`, but that commit failed to change the one place
where the object data is queried. As a consequence, that part still
considers it to be an `XDevice`, so everything that uses the return
value of `device_ensure_xdevice()` works with invalid data. Furthermore,
`device_handle_free()` incorrectly uses the `user_data` as the argument
for `XCloseDevice()` leading to a double free.
Fixes: c390f70edc ("backend: Set up and use ownership chains")
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2995>
Otherwise binding new wl_output's might try to send enter to the
destroyed resource. Fixes the following crash:
#0 wl_resource_get_client at ../src/wayland-server.c:801
#1 handle_output_bound at ../src/wayland/meta-wayland-surface.c:1287
#3 signal_emit_unlocked_R.isra.0 at ../gobject/gsignal.c:3812
#6 ffi_call_unix64 at ../src/x86/unix64.S:104
#7 ffi_call_int at ../src/x86/ffi64.c:673
#8 ffi_call at ../src/x86/ffi64.c:710
#9 wl_closure_invoke at ../src/connection.c:1025
#10 wl_client_connection_data at ../src/wayland-server.c:438
#11 wl_event_loop_dispatch at ../src/event-loop.c:1027
#12 wayland_event_source_dispatch at ../src/wayland/meta-wayland.c:125
#15 g_main_context_iterate.isra.0 at ../glib/gmain.c:4276
#17 meta_context_run_main_loop at ../src/core/meta-context.c:482
Related: https://bugzilla.redhat.com/show_bug.cgi?id=2196527
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2992>
Otherwise drivers would be free to alter the buffer content. While no
driver is known to do so, it's probably good to make things explicit.
See also `import_simple_dmabuf()` in Weston.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2990>
The DMA buffer paths vs MemFd paths differ slightly in when content is
recorded. This was in some places done by trying to record but bail if
the dequeued buffer had the wrong type. This is problematic for two
reasons: we'd update the timestamp even if we refused to record, making
the follow-up attempt fail, and we'd dequeue and queue buffers that
didn't get any content, meaning the receiving end would see empty
buffers potentially with only cursor updates.
Fix this by keeping track if a stream is DMA buffer able or not, and
don't attempt to record at all in the places we would previously require
DMA buffers. This avoids both issues: we don't dequeue/queue pw_buffers
that we refuse to record to, and we won't update the recorded timestamp
when we didn't intend to record to begin with.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2783
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2987>
Hides libdisplay-info under a build time default-off flag,
provides provision to parse essential edid parameters with
APIs provided by libdisplay-info. This implementaion increases
readibility, avoids code duplication and decreases complexity
of edid parsing.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2642>
We are attempting to show windows that do not yet have a
surface/buffer, this makes GNOME Shell avoid transitions
for these windows.
Since on Wayland X11 windows are also Wayland surfaces,
this check is also valid for these, and is thus made more
generic to also cater for these windows.
Eventually, meta_window_update_visibility() is called
when the surface gets its buffer, so the window can be
neatly animated.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2611
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2975>
This ATM triggers missed .commit events for the window in question,
to be addressed in Xwayland. Since the test does not seem to specifically
rely on this window being CSD, make it a regular window instead.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2975>
Going for the default GL renderer is known to trigger rendering
artifacts using the NVidia proprietary driver. Since we don't have
too many expectatives about frames being flashy (not to the point
of mandating GL), resort to the cairo renderer in the mean time.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2976>
Just like the HDR Metadata property the Colorspace property values only
indicate that the display driver supports signaling certain colorimetry.
It does not indidcate that the sink actually supports processing the
colorimetry. For this we have to look up the colorimetry support in the
EDID.
The default colorimetry is always supported. If we want bt.2020 we might
get either the RGB or YCC variant even if we ask for the RGB variant but
there is nothing we can do about it so let's just pretend it's a driver
issue.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2919>
If the used EGL backend supports it. In practice this should currently
only affect the nested backend.
Enabling modifiers can help with app development. An example is
`weston-simple-dmabuf-v4l`, which requires the linear modifier to be
available.
Note that Weston behaves similar already.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2972>
This will be used to extract the resolution and refresh rate from
strings like "1920x1080@60.0" or "1280x720". This aims to replace the
use of the locale dependent sscanf() function.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2902>
This function gets called when a surface state transaction is applied.
Applying a transaction can get delayed, so the Wayland resource may have
already been destroyed when we get here. In that case we cannot send
events, so there's nothing to do.
v2:
* Drop code comment, expand commit log instead. (Jonas Ådahl)
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2737
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2967>
Otherwise we'll have a cursor sprite backed by a surface that no longer
exist. This usually doesn't happen, but can happen in rare situations
related to pointer capability changes Wayland client cursor changes and
hotplugs.
Fixes the following crash:
#0 meta_wayland_buffer_get_resource() at ../src/wayland/meta-wayland-buffer.c:128
#1 realize_cursor_sprite_from_wl_buffer_for_gpu() at ../src/backends/native/meta-cursor-renderer-native.c:1649
#2 realize_cursor_sprite_for_gpu() at ../src/backends/native/meta-cursor-renderer-native.c:1869
#3 realize_cursor_sprite() at ../src/backends/native/meta-cursor-renderer-native.c:1887
#4 meta_cursor_renderer_native_update_cursor() at ../src/backends/native/meta-cursor-renderer-native.c:1100
#5 meta_cursor_renderer_update_cursor() at ../src/backends/meta-cursor-renderer.c:414
#6 meta_cursor_renderer_force_update() at ../src/backends/meta-cursor-renderer.c:449
#7 update_cursors() at ../src/backends/meta-backend.c:328
#8 meta_backend_monitors_changed() at ../src/backends/meta-backend.c:338
#9 meta_monitor_manager_notify_monitors_changed() at ../src/backends/meta-monitor-manager.c:3590
#10 meta_monitor_manager_rebuild() at ../src/backends/meta-monitor-manager.c:3678
#11 meta_monitor_manager_native_apply_monitors_config() at ../src/backends/native/meta-monitor-manager-native.c:343
#12 meta_monitor_manager_apply_monitors_config() at ../src/backends/meta-monitor-manager.c:706
#13 meta_monitor_manager_ensure_configured() at ../src/backends/meta-monitor-manager.c:779
#14 meta_monitor_manager_reconfigure() at ../src/backends/meta-monitor-manager.c:3738
#15 meta_monitor_manager_reload() at ../src/backends/meta-monitor-manager.c:3745
or the following on gnome-43:
#0 meta_wayland_surface_get_buffer at ../src/wayland/meta-wayland-surface.c:441
#1 meta_cursor_sprite_wayland_get_buffer at ../src/wayland/meta-cursor-sprite-wayland.c:83
#2 realize_cursor_sprite_from_wl_buffer_for_gpu at ../src/backends/native/meta-cursor-renderer-native.c:1612
#3 realize_cursor_sprite_for_gpu at ../src/backends/native/meta-cursor-renderer-native.c:1836
#4 realize_cursor_sprite at ../src/backends/native/meta-cursor-renderer-native.c:1854
#5 meta_cursor_renderer_native_update_cursor at ../src/backends/native/meta-cursor-renderer-native.c:1087
#6 meta_cursor_renderer_update_cursor at ../src/backends/meta-cursor-renderer.c:413
#7 meta_cursor_renderer_force_update at ../src/backends/meta-cursor-renderer.c:448
#8 update_cursors at ../src/backends/meta-backend.c:344
#9 meta_backend_monitors_changed at ../src/backends/meta-backend.c:354
Related: https://bugzilla.redhat.com/show_bug.cgi?id=2185113
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2968>
Under certain conditions a stage-view update does not trigger a kms
update.
In such cases we still want the next update to run within the same
refresh cycle, as otherwise we'd waste the remaining time in the
current one.
At the same time we currently use the `after-update` signal for Wayland
frame events, which again may result in more "empty" updates -
creating an unthrottled feedback loop. This can trigger excessive
load both in the compositor as well as in clients.
Introduce a new GSource that is dispatched once per refresh cycle at
maximum per stage view and use it to emit frame events. Do so by
computing the time from when on we can be sure that an update resulting
from a client commit would certainly get scheduled to the next refresh
cycle.
Note: this only works on the native backend. Given that chances are
small that we hit the corresponding issue on e.g. the nested backend,
stick to the previous behavior there for now.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2823>
When selecting the default focus window, is_focusable() was not
considering the new conditions for whether a window should be shown or
hidden that were added to meta_window_should_be_showing() in 39942974.
As a result the default focus window could end up a window already
hidden or hidden once meta_window_flush_calc_showing() is called by
meta_window_focus() when focusing the default window. This would cause
meta_window_focus() to fail, which is an issue if it prevents us from
unfocusing a window when it is getting unmanaged.
Fixes: 399429742 ("x11: Integrate frames client into Mutter")
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2644
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2962>
create_and_send_dnd_offer() sets the compositor of the offer to the one
from the MetaWaylandDataSource. This then later gets used in
display_from_offer() when trying to get the context from the compositor.
meta_wayland_data_source_xwayland_new() however was not setting the
compositor, so this was causing crashes when dragging things from X11
windows on Wayland.
Fixes: 2731f0cda ("wayland: Setup and use ownership chains")
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2723
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2956>
This ensures that applications are notified when a drag gets cancelled
because the user dropped or press ESC while in overview.
This fixes an issue with Chromium on Wayland refusing to acknowledge
wl_pointer::enter events after accidentally dropping a
Chromium-originated object in GNOME Shell overview.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2953>
Ensure the frame window is created at the right fullscreen state
before showing it and assigning it to the client window.
A peculiarity of this property on frame windows is that it is
typically single-handedly updated from the Mutter side, in synchronization
with client window state. It can only differ during creation, since
GTK still likes to apply its own state.
Also, the only relevant property seems to be _NET_WM_STATE_FULLSCREEN,
since the others are less relevant to the role of the frames client,
and get applied to the MetaWindow as a whole, instead.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2712
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2961>
After this got changed from gdk_x11_get_xatom_name() to XGetAtomName(),
this no longer returns a const char* and it now also needs to be freed.
Fixes: e66f4396e ("x11: Avoid GDK API in X11 selections")
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2957>
This was pointlessly being converted between atom and string and back,
which with the switch from gdk_x11_get_xatom_name() to XGetAtomName()
also introduced a leak for every XGetAtomName() call.
Fixes: e66f4396e ("x11: Avoid GDK API in X11 selections")
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2957>
The private format and type member variables were not being used by any
of the callers, so they can simply be removed. This also fixes a leak of
type which was introduced when switching from gdk_x11_get_xatom_name()
to XGetAtomName().
Fixes: e66f4396e ("x11: Avoid GDK API in X11 selections")
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2957>
After this got changed from gdk_x11_get_xatom_name() to XGetAtomName(),
this no longer returns a const char* and it now also needs to be freed.
Fixes: 014cde646 ("wayland: Do not use GDK functions on XDnD implementation")
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2957>
We might end up trying to apply a pending state late if it was delayed
by DMA buffers not being ready. Trying to discard the pending state from
the transaction when dismissing is hard, because we might be applying a
chain of transactions that would disqualify subsequent transactions if a
former one dismisses the popup, so lets just drop what the apply would
otherwise do, if we're not going to use it anyway.
This fixes the following crash:
0) meta_wayland_surface_get_window (surface=0x0)
1) meta_wayland_xdg_popup_apply_state (surface_role=0xf5ee80, pending=0xf662a0)
2) meta_wayland_surface_role_apply_state (surface_role=0xf5ee80, pending=0xf662a0)
3) meta_wayland_surface_apply_state (surface=0xf5e640, state=0xf662a0)
4) meta_wayland_transaction_apply (transaction=0xf56170, first_candidate=0x7fffffffcee8)
5) meta_wayland_transaction_maybe_apply_one (transaction=0xf56170, first_candidate=0x7fffffffcee8)
6) meta_wayland_transaction_maybe_apply (transaction=0xf56170)
7) meta_wayland_transaction_dma_buf_dispatch (buffer=0xf448a0, user_data=0xf56200)
8) meta_wayland_dma_buf_source_dispatch (base=0xf5f140, callback=0x0, user_data=0x0)
9) g_main_dispatch (context=0x41baa0)
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2940>
If the popup was dismissed (i.e. has no MetaWindow anymore), it'll also
have no parent surface. With no parent surface, we'd try to fetch a
transaction from NULL and crash, but if we don't try if we were
dismissed, we won't reach here anyway.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2940>
With the frames client, we do no longer handle events for the
frame window inside Mutter. This means we do not get events
"for free" to handle focus on a just clicked frame window.
This results in a background window not ending up focused if
clicked on its frame.
In order to fix this, make the passive button grab extend to
the frame window if a window has one. This brings back
focus-on-click behavior, while treating windows further as
a unitary surface.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2727
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2954>
Pass the timestamp of the frame as the target timestamp of the
record. This makes the rudimentary frame throttling mechanism
inside MetaScreenCastStreamSrc work with the timing variability
that dynamic dispatch times introduced.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2804>
Instead of always, unconditionally scheduling an idle callback for
frame recording, try to record a DMA-BUF only frame, and only if
that's not possible, schedule the idle callback.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2804>
When a stream source subclass asks for a DMA-BUF only frame record,
it is legitimate to return FALSE in do_record_frame() - meaning that
a frame was not recorded - but not return an error - meaning nothing
actually failed.
This avoids spamming the journal with warnings on a legitimate case.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2804>
Add meta_screen_cast_stream_src_maybe_record_frame_with_timestamp()
which operates on arbitrary timestamps; and make the current function
meta_screen_cast_stream_src_maybe_record_frame() just call into the
new variant, passing g_get_monotonic_time() as the timestamp.
This will be useful later we start using the target timestamp of the
frame for screencasting.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2804>
This change will export the damaged regions (when available) out
to the pipewire client. This change is currently specific to
virtual streams only (where I was able to test the change) and
maintains the current behavior for other screencast stream types.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2775>
This change allows clipped redraws for offscreen. The net
effect of this change is to preserve the original redraw clip when
possible (rather than overwriting it with the full view redraw) in
the paint context.
This eventually helps in retrieving the fine grained updated regions of
the frame since last redraw and sending it to the pipewire client
(as shown in a subsquent CL).
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2775>
Returning FALSE does not indicate an error, but a valid backlight
value of 0. Consumers expect a negative value to indicate no
backlight support, so return -1 in case of error, just like we
already do for invalid values.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2947>
The window tracker is filtering XEvents manually as it only requires a
subset of the ones that Gdk listens to in the root window, and this is
nice, but we were restricting the set a bit too much because due to this
we were not notified when an xsettings manager was available, and thus
in case gsd-xsettings was launched after meta-window-tracker (a normal
scenario under X11), no xsetting was actually applied to the decoration
windows.
As per this, the default settings were used for everything and never
updated, until a restart of the window-tracker.
In order to be able to monitor the XSettings changes at startup, we also
need to select the StructureNotifyMask as gtk always do by default.
See also:
https://gitlab.gnome.org/GNOME/gtk/-/blob/4.11.1/gdk/x11/gdkscreen-x11.c#L947-950Fixes: #2580
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2948>
The anchor position calculations are somewhat unnecessarily complex
based on root coordinates of pointer and frame positions. This requires
tracking both things, and we don't always get it quite right with the
latter (e.g. window repositions, resizes or overshrinks, leaving the
anchor position visually outside the window).
In order to improve this, capture the window-relative coordinates
when starting the window drag, and ensure the window is always repositioned
in that position, relative to its current size.
This avoids these glitches when unmaximizing a window (e.g. dragged from
the bottom through super+button1 press), or moving windows between monitors
with different scales.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2730
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2942>
Since we only track changes to window_drag->anchor_window_pos
during move operations through on_grab_window_size_changed(), this
rectangle is in essence the same than window_drag->initial_window_pos
all the time. Just use that and move away from the anchor_window_pos
rectangle.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2942>
scan_visible_region() scans through each value of a uint8_t array and checks
whether that value is 255. Right now it always checks one value too much
though, resulting in a buffer overflow. Fix that by checking the array
bounds before actually accessing the array.
Found by running gnome-shell with address sanitizer and starting
GIMP.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2856>
Both GRAB_OP_KEYBOARD_MOVING and GRAB_OP_KEYBOARD_RESIZING_* are
defined as GRAB_OP_WINDOW_BASE with FLAG_KEYBOARD set, but the
latter have additional bits set to indicate the direction.
That is, the GRAB_OP_KEYBOARD_MOVING bitmask cannot be used to
differentiate between move- and resize operations. Instead,
check that no direction bits are set.
https://gitlab.gnome.org/GNOME/mutter/-/issues/2684
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2908>
The unknown color space's only purpose is to signal that the current KMS
state has a unknown color space set. It is not one of the color spaces
that can be set. We already only try to set a color space if the default
color space is supported so we should use the default color space as a
fallback instead of the unknown color space.
Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2693
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2915>
With the move away from GTK3, and the indirect dependency on GTK4
grown in the GNOME Shell side, we've indirectly gotten a small sneaky
behavioral change: The GTK4 library will, right on dlopen, get
DESKTOP_AUTOSTART_ID for itself and delete it from the environment.
This happens before our own X11 session management code is
initialized, which confuses the hell out of it, into thinking
initialization is actually shutdown, gnome-session does not follow
along with this request, which leaves GNOME Shell into a confused
startup state where it never calls SmcSaveYourselfDone() and grinds
startup to a halt until gnome-session decides to move things forward.
In order to fix this, get the DESKTOP_AUTOSTART_ID before we lend
control to GNOME Shell bits and GTK4 is possibly initialized, and
feed it directly to our X11 session manager bits.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2906>
We might get told to restore the old monitor configuration by the
monitor configuration prompt, in case the user pressed "revert" or
equivalent. This might be in response to a button press, and those
happen during frame clock dispatch. If we would restore an old
configuration during dispatch, it means we would reconfigure the
monitors including their stage views while dispatching, which means we'd
destroy the frame clock while it's dispatching.
Doing that causes problems, as the frame clock isn't expecting to be
destroyed mid-function. Specifically,
We'd enter
clutter_frame_clock_dispatch (clutter-frame-clock.c:811)
frame_clock_source_dispatch (clutter-frame-clock.c:839)
g_main_dispatch (gmain.c:3454)
g_main_context_dispatch (gmain.c:4172)
g_main_context_iterate.constprop.0 (gmain.c:4248)
g_main_loop_run (gmain.c:4448)
meta_context_run_main_loop (meta-context.c:482)
main (main.c:663)
which would first call
_clutter_process_event (clutter-main.c:920)
_clutter_stage_process_queued_events (clutter-stage.c:757)
handle_frame_clock_before_frame (clutter-stage-view.c:1150)
which would emit e.g. a button event all the way to a button press
handler, which would e.g. deny the new configuration:
restore_previous_config (meta-monitor-manager.c:1931)
confirm_configuration (meta-monitor-manager.c:2866)
meta_monitor_manager_confirm_configuration (meta-monitor-manager.c:2880)
meta_plugin_complete_display_change (meta-plugin.c:172)
That would then regenerate the monitor configuration and stage view
layout, which would destroy the old stage view and frame clock.
meta_stage_native_rebuild_views (meta-stage-native.c:68)
meta_backend_native_update_screen_size (meta-backend-native.c:457)
meta_backend_sync_screen_size (meta-backend.c:266)
meta_backend_monitors_changed (meta-backend.c:337)
meta_monitor_manager_notify_monitors_changed (meta-monitor-manager.c:3595)
meta_monitor_manager_rebuild (meta-monitor-manager.c:3683)
meta_monitor_manager_native_apply_monitors_config (meta-monitor-manager-native.c:343)
meta_monitor_manager_apply_monitors_config (meta-monitor-manager.c:704)
After returning back to the original clutter_frame_clock_dispatch()
frame, various state in the frame clock will be gone and we'd crash.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2901>
Commit 7e9d9c7eb9 added new API to replace GTK for accelerator
parsing.
Unfortunately there is another case in gnome-shell, where we have
to get the label from the logical binding name rather than the
modifier+keysym combination.
Add another small method to cover that use case.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2899>
Normally, mutter implicitly allows a window being shown to take
focus. This is normally desired, except it steals input from
GNOME Shell self. Avoid focusing the just shown window in those
situations.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2878>
When a X11 application is started, typically what happens is:
- A startup notification token is created, with a _TIME%d suffix
- The application being spawned receives it through the environment
- (dbus piping, maybe)
- The application replies the startup notification token, and
fetches the timestamp from it
- The application makes a _NET_ACTIVE_WINDOW client message request
with this timestamp
- Mutter handles this client request and activates/focuses the window
Prevent this last step if windows are not interactable (e.g. there is
a compositor grab) and ignore the focus request. This specifically
applies to X11 clients requesting focus themselves, and unlike previous
approaches, doesn't try to prevent focus changes that do come through
interaction with Mutter/GNOME Shell.
This should only break if applications do not observe _NET_ACTIVE_WINDOW
and perform XSetInputFocus on themselves, but in that case the X11
keyboard focus is stolen from our hands already.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2878>
This is the mask that lets us receive among other events the rather
important CreateNotify, that tells us about new winows. This has went by
rather unnoticed except for cases where multiple windows show up very
quickly directly after the frames client spawned, because the drag icon
surface cache eventually already did select that particular mask.
Make things more reliably by explicitly setting the mask for the events
we rely on to function.
This fixes flaky stacking tests that map multiple X11 windows in a row.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2894>
2d8fa26c8e ("core: Pass "frame action" grab operations as an
"unconstrained" grab op") changed the behaviour to treat non-grab
related window moving that has the "user action" flag set to still apply
the "constrain_titlebar_visible" constraint.
The fact that it wasn't applied before was relied upon by some
extensions. While it should arguably exist a better API that for such
extensions to use that have a bit more predictable behavior, until that
is so, restore the old semantics.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2891>
Linear sampling can influence the value of surrounding pixels beyond
the scaled framebuffer extents calculated during stage view rendering,
resulting in flickering graphical artifacts due to unaccounted pixel
changes. This is exhibited in xfreerdp and wlfreerdp at 150% display
scaling.
Fix this by ensuring that all pixels that may be affected by linear
scaling is included in the framebuffer redraw clip by padding the actor
redraw clip.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2771>
We have the drm/InfoFrame encoding and our MetaOutputHdrMetadata
encoding. Check that we can correctly convert between each other by
doing a encode/decode and decode/encode roundtrip and then checking for
equality.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
The existence of the KMS property just means that we can send an
InfoFrame but we also have to make sure the sink actually supports the
metadata type 1 and the selected transfer function.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
Allows to prepare KMS updates to set the color space and HDR Static
Metadata on the output.
For some reason we need ALLOW_MODESET on commits which change the HDR
Static Metadata InfoFrame on AMDGPU. There is no technical reason why
one needs to mode set to send an InfoFrame and the driver should just
manage without ALLOW_MODESET. Until this is resolved in the kernel we
just prepare KMS updates which might mode set.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
The HDR Static Metadata InfoFrame contents are described in CTA-861.3
and the kernel maintains a representation of that in `struct
hdr_metadata_infoframe` in `include/uapi/drm/drm_mode.h`.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
The Colorspace property informs the display about the colorimetry of the
content. Only variants supported by the sink are exposed in the
property. The strings representing the color spaces are undocumented but
can be found in the `hdmi_colorspaces` list in
`drivers/gpu/drm/drm_connector.c` in the Linux kernel (v 6.2).
The HDR_OUTPUT_METADATA property is a blob with the InfoFrame content.
We have to query support for the different values in the struct from the
EDID/DisplayID ourselfs.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
This adds a new 'experimental-hdr' string property to the MonitorManager
which can be changed from looking glass.
Currently when the string equals 'on', HDR (PQ, Rec2020) will be enabled
on all monitors which support it. In the future support for more
transfer functions and color spaces as well as HDR metadata can be
added.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
The color space and HDR metadata are eventually sent as metadata to the
display. The color space informs the display of the colorimetry of the
frames we produce, the HDR metadata informs the display of the transfer
function and additional mastering display colorimetry and luminance to
guide tone and gamut mapping.
The only color spaces we support right now are the default color space
and Rec bt.2020 which is typically used for HDR content. Other supported
color spaces can be added when needed.
The default color space corresponds to whatever colorimetry the display
has when no further changes are made to the calibration of the display.
The colorimetry is communicated to sources via EDID/DisplayID.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2879>
A Wayland client repeatedly requesting activation of its surface using
the xdg-activation protocol would make mutter constantly update the
cursor.
To avoid needlessly updating the cursor back and forth between busy and
default, add a timeout to delay the update.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2849>
When a client (either Wayland or X11) is started, the window activation
will update the cursor to the "busy" cursor.
Mutter will then set the X11 cursor on the X11 root window to match that
so that X11 applications which do not explicitly set a cursor inherit
from that default (busy) cursor.
Updating the X11 cursor too often can hammer the X11 connection and
cause a deadlock with Xwayland.
Reload the X11 cursor in a later handler to avoid that issue.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2849>
We relied on them being valid longer to keep track of used GPUs. If we
don't have the CRTC (or output) we don't have a way to fetch the pointer
to the MetaGpu that drives the associated monitor.
This avoids a crash when trying to fetch said pointer from what would be
the NULL MetaCrtc pointer.
Fixes: 08593ea872 ("onscreen/native: Hold ref to the output and CRTC until detached")
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2667
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2887>
Ensure we preserve the fast zero-copy paths in Xwayland fullscreen
windows, instead of maybe rendering the client surface on top of the
frame surface, and providing the latter to the compositor.
To achieve this, additionally synchronize frame state when
recalculating features (e.g. after fullscreen/unfullscreen), and
account for this new condition when creating or destroying frames.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2797>
We were relying on gdk_cairo_region() to convert a cairo_region_t
into a path ready to fill/stroke in a cairo_t. This is a small
and detached helper that we can do ourselves, so put it together
with all other region helper functions.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2864>
Do the few remaining things that GDK is doing for us:
- Open and close the X11 Display
- Set up a GSource on the Display FD to handle events
- Allocate and free the content of XGenericEventCookie,
to "unroll" the few XInput2 events that Mutter still
does handle.
And remove the GdkDisplay we've so long relied on.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2864>
From reading the comment in the top of the file, not for the first
time. Keep our own error handler and maintain our own list of
failable x11 sequences in MetaX11Display, so we can move away from
GTK's.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2864>
These are done on the backend X11 connection, so it is unclear
what is the interplay through the borrowed global XSetErrorHandler()
that triggers issues for us here.
Anyways, better to be explicit, and use error traps the MetaBackendX11
style, in coherence with the rest of the things happening in that
display.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2864>
When an onscreen is "attached" it means it has an active CRTC and output
it interacts with, e.g. listens to configuration changes to update gamma
and privacy screen state.
MetaOutput and MetaCrtc are rather short lived objects meaning they are
disposed of and regenerated each time the compositor reloads monitor
resources, and while MetaOutput are indirectly kept alive due to the
MetaMonitor holding on to them during reloading, the same does not apply
to MetaCrtc, so to avoid trying to disconnect our signals from
disappeared outputs and CRTCs when we dispatch, hold our own references
to these objects.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2665
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2885>
On exit, explicitly detach the onscreens during disposal. This means no
functional changes, but allows for doing more cleanup on detach that
doesn't need to be repeated on disposal.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2885>
As implemented in colord 1.4.6, cd_icc_load_handle() has three possible
results:
1. success, taking ownership of the profile;
2. failure because cmsGetProfileContextID returns NULL, *not* taking
ownership of the profile;
3. failure in cd_icc_load(), taking ownership of the profile.
The previous commit ensures that we are not in case 2.
In case 3 where cd_icc_load() fails, ownership was already given to
the colord CdIcc object, so it will be freed when the g_autoptr unrefs
the CdIcc, and we must not free it again: that would be a double-free,
potentially resulting in memory corruption.
Resolves: https://gitlab.gnome.org/GNOME/mutter/-/issues/2659
Signed-off-by: Simon McVittie <smcv@debian.org>
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2877>
We want to avoid using too high scales too easily, which started to
happen 2f1dd049bf ("monitor-manager: Rework default scale factor
selection"). Instead of using the closest non-fractional scale, which
effectively is what we'd do, only round upwards if we're closer than
0.25 (25%).
Since there are some wiggle room for scales to make the logical
resolution on the integer pixel grid, make sure to compensate. This
compensation is done by adding an extra 0.2 to scale difference.
For example the following fractional scales will get these corresponding
integer scales:
* 1.25 -> 1.0
* 1.5 -> 1.0
* 1.75 -> 2.0
* 2.0 -> 2.0
* 2.50 -> 2.0
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2880>
Instead of testing headless start using the dummy backend, do so with
the real native backend, and use the drm-mock library instead to emulate
monitors being disconnected at startup.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2821>
This new filter allows test cases to manipulate what the kernel reports,
e.g. mark connected connectors as disconnected to emulate monitors
connecting and disconnecting.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2821>
As part of https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/525
(introduction of transactional KMS API), the logic determining whether a
GPU can have outputs was changed from whether any connectors existed to
whether any connected connectors existed. That effectively meant that we
wouldn't attempt to start at all if there were no monitors connected
while starting up.
This was unintentional, so lets revert back the expected behavior.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2821>
In order to make things more and more asynchronus and to each time we
paint be an isolated event, that can be potentially be applied
individually or together with other updates, make it so that each time
we draw, we use the transient MetaFrameNative (ClutterFrame) instance to
carry a KMS update for us.
For this to work, we also need to restructure how we apply mode sets.
Previously we'd amend the same KMS update each frame during mode set,
then after the last CRTC was composited, we'd apply the update that
contained updates for all CRTC.
Now each CRTC has its own KMS update, and instead we put them in a per
device table, and whenever we finished painting, we'll merge the new
update into any existing one, and then finally once all CRTCs have been
composited, we'll apply an update that contains all the mode sets for all
relevant CRTCs on a device.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2855>
MetaRendererViewNative is a MetaRendererView which contains logic
specific to views of the native backend. It will be used by following
commits.
In the future, per-view logic from MetaRendererNative can be moved to
MetaRendererViewNative where it makes more sense to have it.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2855>
Add a tiny library that sabotages errors in drmMode*() API calls. This
will be used to artificially trigger arbitrary errors, e.g. cause the
next commit to fail with EBUSY.
The three mocked methods are added as they will be used in a future
commit.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
Instead of using the "discarded" page flip callback when the
"discarding" happened during actual immediate processing, communicate
the same via the KMS update feedback.
The "discarded" page flip callback is instead used only for when a
posted page flip is discarded. In the atomic backend, this only happens
on shutdown, while in the simple backend, this also happens when a
asynchronous retry sequence eventually is abandoned.
This allows further improvements making KMS handling fully async.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
At first it was called seal(), but then updates could be amended after
being posted, given a flag. That flag has been removed, so we can go
back to sealing, since it's once again acts more as a seal.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
We test direct client buffer scanout using a TEST_ONLY commit on atomic,
and with various conditions in non-atomic, but if we end up failing to
actually commit despite this, handle the fallout asynchronously. What
this means is that we'll reschedule a new frame immediately.
For this to work, the same scanout buffer needs to be avoided for the
same CRTC. This is done by using the newly added signal on the
CoglScanout object to let the MetaWaylandBuffer object mark the current
buffer as non-working for the onsrceen that it failed on. This allows to
re-try buffers on the same onscreen when new ones are attached.
This queues a full damage, since we consumed the qeued redraw rect. The
redraw rect wasn't lost - it was accumulated to make sure the whole
primary plane was redrawed according to the damage region, whenever we
would end up no longer doing direct scanout, but this accumulation only
works when we're not intentionally stopping to scanout. For now, lets
just damage the whole view, it's just an graceful fallback in response
to an unexpected error anyway.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
If we call schedule(), which will schedule an update some time in the
future, and then schedule_now(), we should reschedule the frame clock to
update immediately, and not some time in the future.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
If we get a "ready" page flip feedback, it means the page flip was
symbolic, i.e. not real, e.g. as a result of an update that didn't
change the state of the primary plane. Warn if there is a "next fb"
meaning we expected to have a new buffer that we flipped to.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
This is intended to be used only for plane assignment, and CRTC like
changes, so that one can e.g. change a cursor plane on a pending update
that changes the primary plane, before it has been committed to KMS.
The kms-updates test overrides the get-state function MetaKmsCrtc. This
is needd to not have the update mechanism not clamp the gamma size to 0,
as vkms reports the gamma length 0. By pretending it's 3, we can test a
simple and small gamma lut is merged correctly when merging updates.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2854>
This looks like a bug: There's no reason why windows which advertise
min-size hints that are exactly the size of the workarea should not be
allowed to maximize, so change the checks here to allow for that.
The commit message of 7f64d6b9 also makes the point that this was not
intended, as it says "larger than".
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2873>
Surfaces belonging to a screen-casted window should always be considered
visible even if they are not visible on any stage view - be it because
they are on a different workspace, minimized or occluded.
Doing this in an optimal fashion is highly complex right now -
interdependent with (and somewhat similar to) ClutterClones. Thus treat
stream-casted surfaces similar to those with clones, with the small
difference that even a fully invisible surface still gets a primary view
- the fastest one. This ensures that clients never refresh too slow for a
screen-cast, at the cost of sometimes refreshing too fast.
The later only happens on certain multi-monitor setups and should thus be
acceptable.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2789>
There is an increasing number of cases where we want the frame callback
logic to run for a stage-view and the complexity needed to avoid these,
combined with the likelyhood of bugs, arguably does not justify the
benefit any more.
Thus unconditionally schedule updates for all stage-views when frame
callbacks are requested.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2789>
Screen-casted windows need to be considered visible in various situations
but existing APIs such as `clutter_actor_is_effectively_on_stage_view()`
don't do so. Add new API that allows checking if a surface belongs to a
screen-casted window for the respective cases.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2789>
The introduction of the META_GRAB_OP_WINDOW_FLAG_UNCONSTRAINED
flag threw off some checks around keyboard-driven resize. This
was partly because there were some == checks that did not account
for that flag maybe being enabled, but also the handling
of META_GRAB_OP_KEYBOARD_RESIZING_UNKNOWN into a definite
resize direction was maybe unsetting that flag. Fix both things
at the same time.
Fixes: 2d8fa26c8e ("core: Pass "frame action" grab operations as an "unconstrained" grab op")
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2629
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2871>
From the scale factors available to it, Mutter will now try to select
the scale factor that makes the UI's size as close as possible to the
size it would be, w/o scaling, on a display at 135 PPI (for mobile
displays) or at 110 PPI (for stationary displays)
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2653>
After !2489, the active workspace's MRU list is now used to pick
the next focus window instead of the stack order.
This list is currently only updated on focus, which can lead to
surprising behavior when closing a window after activating its
ShellApp in the shell.
That is because raising a window (as part of shell_app_activate())
will only change the stacking order, so when closing the active
app window, the focus will switch to whatever had focus before the
app was activated, not the app's next window.
In order to allow gnome-shell to address this, add a new
raise_and_make_recent() method that also adjust the MRU order.
https://gitlab.gnome.org/GNOME/mutter/-/issues/2540
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2866>
The pointer to the manager, the peer name and the ID are things that are
always metadata related to a session, so make them properties on the
interface instead of duplicating them. The implementations still need to
keep track of them, but their existance is shared.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2713>
This class is intended to be used as a base class for D-bus interface
implementations that deal with "session" objects, i.e. a D-Bus object
representing a certain session of some kind, e.g. a screen cast session.
It handles things such as hooking up to the D-Bus client watcher,
generates IDs, handles shutdown procedures.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2713>
It's currently not set by anything, and will only be used by
non-abstract implementations of a future D-Bus interface session
manager. When interface implementations gets ported to this new type,
their MetaDbusSession implementations will set this vfunc.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2713>
This means the MetaDbusSession interface takes a more active role
instead of being something that more or less sends signals to the
interface implementor. This will allow better control when using
MetaDbusSession to manage these sessions, instead of their non-abstract
variants.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2713>
Allows for creating LUTs at some fixed size which maintains enough
precision for concatenating or otherwise manipulating the LUT without
having to care about the precision of the hardware.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2861>
If the device supports the atomic API the property based API is used to
write gamma updates and the legacy API is used in the non-atomic case.
The current state is read from the legacy API always though which can be
different from the property API. This commit always uses the correct API
to update the state.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2861>
This API will be used by GNOME Shell to handle X11 events
in the relevant places, as a substitute to gdk_window_add_filter().
It is ATM still a bit ironic, since the Mutter X11 event handler
is itself a GdkFilterFunc, but it may move away from that eventually.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2779>
With detach meaning having the onscreen stop listening on configuration
changes on the corresponding backing mode setting objects. We need to do
this as there is a time between rebuilding the views, and that the new
mode sets are called, where the old onscreen is kept alive, but the
stage view is gone. At this point in time, if privacy screen or gamma
configuration changes, e.g. by the night light temperature changing, the
onscreen would attempt to schedule an update on the now gone stage view.
This commit also renames the "keep onscreen alive" to "detached
onscreens" to more clearly communicate that it's detached onscreens from
their corresponding mode setting objects.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2621
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2863>
For the coordinates of pointers or stylii, we translate the ones we store
using the viewport matrix already. For touch events otoh, we store coords
untranslated and translate them later only for event emission.
Let's be consistent here and store the coordinates of touch events
translated, just like we do for pointer events.
This fixes touch window dragging on rotated monitors. MetaWindowDrag calls
clutter_seat_query_state(), which uses those stored coordinates. So in case
of a touch sequence the coords returned by query_state() would be
untranslated.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2859>
In the case where we early-out from meta_window_drag_begin(), the
effective_drag_window might not be set yet. In this case, we might finalize
the object before effective_drag_window is set, leading to a NULL pointer
when accessing window->display in hide_tile_preview().
To avoid that crash, add a check whether the window is set already. If no
window is set, we can just skip hiding the preview anyway.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2858>
This fixes an issue when GLFW tries to change the display resolution
while fullscreen where the application window size doesn't get updated
according to the emulated resolution.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2725>
Streams are generally recoverable by the client and errors may happen
e.g. on negotiation failures. Right now we close the stream and
corresponding session, which is neither necessary nor expected by
clients.
Just disable the stream instead and let clients handle things as they
seem fit. This allows clients to e.g. try several Gstreamer pipelines
with limited caps on a single stream.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2850>
Doing it in dispose means the backend is actively tearing down itself,
meaning various components might or might not be there, depending on how
the tearing down is implemented. Make things a bit more robust by doing
any work that might rely on the backend being there before shutdown is
done in response to the 'prepare-shutdown' signal being emitted by the
backend.
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2853>
