Commit Graph

27198 Commits

Author SHA1 Message Date
Carlos Garnacho
efd065259d backends: Drop GDK device querying code from MetaCursorTracker
Clutter behavior is now equivalent to GDK's on X11, avoid poking to
GDK here.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
dea909aea7 clutter: Simplify backend-independent touch accounting
Coordinates are tracked by the ClutterSeat backends, we just need to
track the target actor at this level.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
2411460cff clutter: Drop clutter_input_device_set_coords()
Input devices aren't "updated" anymore, but their state queried to the
seat. This goes nowhere.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
3234ae2993 clutter: Drop clutter_input_device_update_from_event()
Input devices aren't "updated" anymore, but their state queried to
the seat instead. This API was only meant for embedders of Clutter,
and is pointless to us.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
730da1dbe1 clutter: Pass base event to clutter_input_device_update()
So we may fetch coordinates without necessarily querying the device
state.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
932a5cab09 clutter: Drop clutter_input_device_set_state()
Nothing uses it anymore.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
7d78768809 backends/native: Move away from ClutterInputDevice coords
Use a new set in MetaInputDeviceNative, this coexists with
ClutterInputDevice coords for the time being. This API will
eventually be only accessed from the input thread.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
cb7794c19c clutter: Use ClutterSeat underneath coords/modifiers input device getters
This is not device state, but belonging to seat guts.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
9d195b3fa4 backends/native: Implement ClutterSeat::query_state() vmethod
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
384b97792d backends/x11: Implement ClutterSeat::query_state() vmethod
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Carlos Garnacho
fba1122a3c clutter: Add ClutterSeat::query_state() vmethod
This will query a device state; position and modifiers.
Note that ClutterSeat subclasses don't implement the vmethod yet,
so calling clutter_seat_query_state() may crash ATM.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1403>
2020-11-27 15:14:33 +00:00
Jonas Ådahl
f6db6cd203 monitor-config-manager: Handle multiple builtin panels gracefully
While multiple built-in panels isn't actually supported in any
meaningful manner, if we would ever end up with such a situation, e.g.
due to kernel bugs[0], we shouldn't crash when trying to set an
'external only' without any external monitors.

While we could handle this with more degraded functionality (e.g. don't
support the 'switch' method of monitor configuration at all), handle it
by simply not trying to switch to external-only when there are no,
according to the kernel, external monitors available. This would e.g.
still allow betwene 'mirror-all', and 'linear' switches.

The crash itself was disguised as an arbitrary X11 BadValue error, due
to mutter trying to resize the root window to 0x0, as the monitor
configuration that was applied consisted of zero logical monitors, thus
was effectively empty.

[0] https://bugzilla.redhat.com/show_bug.cgi?id=1896904

Related: https://bugzilla.redhat.com/show_bug.cgi?id=1899260
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1607>
2020-11-27 09:11:43 +01:00
Jonas Ådahl
b7a9c1d4e5 tests/monitor-unit-tests: Remove left-over debug printf
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1607>
2020-11-27 09:08:21 +01:00
Simon McVittie
60f647df8e backends/native: Don't crash if keymap is misconfigured
xkb recently gained support for user-specified keymaps, which means we
can no longer assume that the configuration data is necessarily fully
complete or correct; and the configuration language is quite a labyrinth,
so it's easy to get wrong. If setting the keymap fails, leave it in
whatever state it previously had, since that seems preferable to crashing
with a NULL pointer dereference.

Resolves: https://gitlab.gnome.org/GNOME/mutter/-/issues/1555
Signed-off-by: Simon McVittie <smcv@debian.org>
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1605>
2020-11-26 12:11:33 +00:00
Daniel van Vugt
17dbb98811 clutter/stage: Remove fps_timer
It's unused since a9a9a0d1c5.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1603>
2020-11-26 11:03:08 +00:00
Florian Zwoch
efb577efb0 screen-cast: Fix segfault when drawing cursor
Add a sanity check if the cursor is on screen and cursor texture data
is available. This prevents a potential segfault when trying to access
non-existing texture data.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1446
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1604>
2020-11-26 09:59:44 +01:00
Georges Basile Stavracas Neto
6c4b897d74 clutter/actor: Cull out when picking
Testing points and rays against boxes is substantially cheaper - in
fact, almost trivial - compared to triangles. Check if the actor's
paint volume doesn't intersect with the current pick point / ray,
and skip recursing altogether in those cases.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1520>
2020-11-25 16:34:29 +00:00
Georges Basile Stavracas Neto
1fdde25b3e clutter/paint-volume: Add new API to convert to graphene_box_t
Will be used to cull when picking based on the actor's projected
paint volume.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1520>
2020-11-25 16:34:29 +00:00
Georges Basile Stavracas Neto
c3534d3390 clutter/pick-context: Store point and ray on construction
It'll be used to do a quick box test to cull out while picking.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1520>
2020-11-25 16:34:29 +00:00
Georges Basile Stavracas Neto
1b29d265a8 clutter/stage: Remove cached pick mode
The cached pick mode never actually cached anything, since it is
always, unconditionally reset when painting. Furthermore, next
commits will cull out actors during pick, which makes the pick
stack uncacheable.

Remove the cached pick mode.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1520>
2020-11-25 16:34:29 +00:00
Georges Basile Stavracas Neto
3073aee7c8 clutter/pick-stack: Add autoptr support
It'll allow us use g_autoptr (ClutterPickStack) when removing the pick stack
cache, making the code a bit more modern.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1520>
2020-11-25 16:34:29 +00:00
Simon McVittie
1a1f1eccba clutter/frame-clock: Schedule a frame at least once per second
Users of Debian arm64 (aarch64) report that on at least some GPUs
or screens, after time-based screen blanking has occurred, it is not
possible to unlock the screen. Bisection indicates that this regressed
in commit 209b1ba3, so presumably this is because a refresh rate of 0
is reported while the screen is blanked, leading to the frame clock
pausing forever.

Fixes: 209b1ba3 "clutter/frame-clock: Adapt refresh rate from to frame info"
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1536
Bug-Debian: https://bugs.debian.org/974172
Signed-off-by: Simon McVittie <smcv@debian.org>
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1601>
2020-11-25 10:14:10 +00:00
Jonas Dreßler
58930e9e1f clutter/actor: Use a variable to check if culling is allowed
Since we now want to check whether culling is force-disabled using a
debug flag in two places, let's factor this out into a separate
variable.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1591>
2020-11-25 01:08:02 +01:00
Jonas Dreßler
0320649a1c clutter/actor: Always update last_paint_volumes during painting
It's currently possible that some last_paint_volumes don't get updated
during a paint cycle, this can happen when a ClutterOffscreenEffect is
used: The offscreen effect might skip painting the content and the
children of an actor because it uses its own offscreened texture
instead. This means the offscreen effect doesn't call
clutter_actor_continue_paint(), and thus the the last_paint_volumes of
the children won't be updated.

Now one might think that isn't a problem, because as soon as a child
changes it's size or position, the offscreened texture would get
invalidated and clutter_actor_continue_paint() would get called. It's
not that easy though: Because the last_paint_volume includes all the
transformation matrices up to eye-coordinates, it has to be updated on
any changes to matrices, which includes position/transformation changes
to any actor up the hierarchy.

Now that's where get into problems with the offscreen effect: In case of
transformation changes to the offscreened actor or an actor up the
hierarchy, the offscreened texture won't get invalidated (that makes
sense, we can simply paint it transformed) and the last_paint_volumes
won't get updated even though they should.

This leaves us around with outdated last_paint_volumes where
last_paint_volume_valid is still set to TRUE. It can cause issues with
culling and clipped redraws.

So fix that by ensuring that all children that would get painted by
Clutter get their last_paint_volumes updated in case a ClutterEffect
decided not to call clutter_actor_continue_paint().

This ignores the case where a paint() vfunc override does the same and
doesn't call clutter_actor_paint() on children. Let's ignore this case
for now, there shouldn't be any implementation which does that and
ideally in a world that's painted solely by ClutterContent, we can get
rid of that vfunc in the future.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1591>
2020-11-25 01:07:32 +01:00
Jonas Dreßler
0da8a49719 clutter/stage: Clarify comments in add_to_stage_clip() a bit
The first comment isn't really needed anymore since
the is_full_stage_redraw_queued() underneath is quite self-explaining.

Also rephrase the second comment a bit, including that
_clutter_paint_volume_get_stage_paint_box() does the aligning to the
pixel grid.

Finally, the last comment also looks out of date since we do that
rounding inside _clutter_paint_volume_get_stage_paint_box(), so remove
it.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1511>
2020-11-24 18:30:19 +00:00
Jonas Dreßler
906124b09f clutter/stage: Don't pass QueueRedrawEntries to actors
We currently pass actors a reference to their associated
ClutterStageQueueRedrawEntry when queueing a redraw. This "splitting" of
the ownership of the entry has introduced quite a few bugs in the past
and is hard to follow.

So give up the "splitting" of the ownership and exclusively handle those
entries inside ClutterStage. To still allow removing the entry when an
actor gets unrealized introduce clutter_stage_dequeue_actor_redraw()
similar to what we already have for relayouts.

To be able to efficiently find entries when actors queue redraws, make
pending_queue_redraws a GHashTable, which fits quite nicely and also
allows removing the QueueRedrawEntries actor pointer in favour of the
key of the hashtable.

Since the struct is now private to ClutterStage, we can also rename it
to QueueRedrawEntry.

While at it, also sneak in the removal of the leading underscore from
clutter_stage_queue_actor_redraw().

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1511>
2020-11-24 18:30:19 +00:00
Jonas Dreßler
1cd386551d clutter/actor: Remove the queue-redraw signal
The "queue-redraw" signal is not used anywhere in Clutter and we now
also removed the vfunc implementation of the stage. So stop emitting it
and remove it, but keep the propagate_queue_redraw infrastructure to
make sure clones still get their redraws queued.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1511>
2020-11-24 18:30:19 +00:00
Jonas Dreßler
ce4c297cea clutter/actor: Emit the queue-redraw signal right away
Since we now decoupled the "queue-redraw" signal from creating the stage
clip, we can move signal emission into
_clutter_actor_queue_redraw_full() and emit the signal right away when
queueing a redraw on an actor. With that we now no longer have to
accommodate for the stage pending_queue_redraws list changing while
iterating over it.

To ensure we don't emit the signal too often when multiple redraws are
queued on one actor, use the propagated_one_redraw flag to limit the
number of emissions to a single one for every update cycle.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1511>
2020-11-24 18:30:19 +00:00
Jonas Dreßler
9b16eff784 clutter: Move assembling the redraw clip out of "queue-redraw" signal
Putting together the redraw clip of the stage never really fitted nicely
with the "queue-redraw" signal emission, it forces us to emit the
signals in a batch and we also use a weird trick to get the old paint
volume that's already on-screen into the final redraw clip (we call
_clutter_actor_propagate_queue_redraw() on the stage).

So start breaking up this association by making the stage explicitely
request the redraw clip from the actor and removing the
ClutterPaintVolume argument from _clutter_actor_finish_queue_redraw().
This is done by adding a private function
clutter_actor_get_redraw_clip() which returns our old (currently
visible) paint volume and the new paint volume.

This also allows removing the check whether a full stage redraw has been
queued in clutter_actor_real_queue_redraw() and we can now just stop the
signal emission if a propagation happened at least once.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1511>
2020-11-24 18:30:19 +00:00
Jonas Ådahl
5ddf416bc9 ci: Build and test also on aarch64
This adds 64 bit ARM support to parts of the CI pipeline, more
specifically, we now:

  - Build a 64 bit ARM container image alongside the 64 bit x86 one.
  - Build test mutter on 64 bit ARM
  - Run tests on 64 bit ARM
  - Check coverage on 64 bit ARM

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1577>
2020-11-23 17:53:36 +01:00
Georges Basile Stavracas Neto
3cf11f77b3 clutter/pick-stack: Move triangle check to else block
Just to improve the legibility of this part of the code. We
go either through box, or triangle, but never both.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1599>
2020-11-23 13:34:28 -03:00
Georges Basile Stavracas Neto
d2feaa8d67 clutter/pick-stack: Use graphene_box_t for axis-aligned rectangles
The most common case for Clutter is 2D axis-aligned actors, which
maintain these properties even after projecting to eye coordinates.
In those cases, we can use a simpler hit test by checking against
boxes.

Not only this is simpler, but this maintains an important aspect
of picking that is a requirement for Clutter: watertightness. Even
though the triangles checks do work on x86_64, they do not guarantee
watertightness. This breaks tests on ARM.

Use graphene_box_t to hit-test axis-aligned 2D actors.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1599>
2020-11-23 13:34:28 -03:00
Jonas Ådahl
aa186193b5 ci: Bump ci-templates to include ci-fairy fix
This should avoid ci-fairy crashing when checking merge requests on the
same repo as the target branch.

See
https://gitlab.freedesktop.org/freedesktop/ci-templates/-/merge_requests/66.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1587>
2020-11-23 14:27:38 +00:00
Jonas Ådahl
6e27cc0548 ci: Generate junit report if project doesn't enable the registry
The image registry must be enabled for the CI to work, as the container
image from the upstream registry is placed (as a reference, more or
less) in the local registry.

Recently, ci-templates got a bit more helpful if this happened, and will
fail up front and generate a JUnit report with a message describing the
issue.

Update to this version.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1587>
2020-11-23 14:27:38 +00:00
Jonas Dreßler
b5a7fe4b23 clutter/actor: Handle clips correctly when building paint volume
clutter_actor_paint() implements a clear preference for custom clips
over clip_to_allocation: If a custom clip is set, clip_to_allocation is
ignored.

Since the paint volume reflects what Clutter is going to paint, we
should handle it the same when putting together our paint volume: So
first handle custom clips, and if one is set, use that. Then handle
clip_to_allocation, and if that's set, use that. And finally, if both
aren't set, union our allocation with the children paint volumes to get
the building volume.

clutter_actor_paint() also doesn't check whether the custom clip is
empty: If that's the case, it will simply not paint anything. Given that
that's allowed by clutter_actor_paint(), the paint volume should also
follow here and return an empty paint volume in case the custom clip is
empty.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1592>
2020-11-23 14:06:13 +00:00
Jonas Dreßler
44563d2932 clutter/actor: Don't union child paint volumes if clip is set
When a custom clip is set for an actor, this actor is not going to allow
any painting outside that clip. That includes the children, which may
also not paint outside that clip.

Now in case clip_to_allocation is set to TRUE, we already already do the
right thing and simply use the allocation as our paint volume, ignoring
the volumes of our children. The same should be done for the custom
clip, so also stop the process of building the paint volume once we see
that a custom clip is set and simply use that clip.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1592>
2020-11-23 14:06:13 +00:00
Robert Mader
3b7137cb35 surface-actor-wayland: Optimize get_current_primary_view for single view
In case we only have a single view (or there's only one view left to
check and the actor is visible on previous views) we can take a short-
cut, saving a region allocation and some calculations.

While on it, declare float numbers in '.f' style to make them more
recognizable.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1596>
2020-11-23 14:49:42 +01:00
Olivier Fourdan
27131198c7 window: Fix size hints with CSD
Commit 03c69ed8 ("Do not go past size hints on resize") was meant to
ensure the size hints set by the client would be honored during resize,
as going past those values could cause the window to move on resize.

However, it did so by calling ensure_size_hints_satisfied() which works
with the frame rect rather than the client rect. As a result, the
minimum size enforced would end up being larger than expected with
client-side decorations.

Use meta_window_maybe_apply_size_hints() instead which automatically
adjusts for client size.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1542
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1594>
2020-11-23 10:17:55 +01:00
Jonas Dreßler
3843293e40 clutter/text: Use new pango API to compare attribute lists
Use the new API provided by Pango to compare two PangoAttrLists, this
means we can also detect equal lists that were newly created and avoid
the expensive relayout of the ClutterText a lot more often.

Depends on https://gitlab.gnome.org/GNOME/pango/merge_requests/172

Fixes https://gitlab.gnome.org/GNOME/gnome-shell/issues/1411

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1050>
2020-11-22 14:57:05 +01:00
Jonas Dreßler
aedbe037e4 build: Bump pango version to 1.46.0
We're going to use new APIs from Pango like pango_attr_list_equal(), so
bump the version requirement to 1.46.0.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1050>
2020-11-22 14:57:02 +01:00
Jonas Ådahl
78f43baa93 ci: Guard pipeline on review stage
The first step is now review, as they use the tiny ci-fairy image, not
our custom ones, so the guards should be on those, not the build step.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1588>
2020-11-20 23:19:49 +00:00
Jonas Ådahl
6b220c9c37 ci: Rename only_default to pipeline_guard
It's the rules that guard the pipelines, deciding when they are allowed
to run or not. The 'only_default' comes from the fact that in the past
they set the only: field.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1588>
2020-11-20 23:19:49 +00:00
Florian Müllner
abd8032fe5 ci: Include gdm in image
gnome-shell depends on gdm's client library at runtime, but the
new pipeline-built image no longer provides it.

Add it back, but built it from source instead of using the Fedora
package, so we don't draw in all of gdm's runtime dependencies
(which includes a full GNOME session including gnome-shell).

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1590>
2020-11-20 20:19:50 +01:00
Florian Müllner
bfeec27435 ci: Include development files for accountsservice
... needed to build GDM, which we'll do in the next commit.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1590>
2020-11-20 20:19:50 +01:00
Jonas Ådahl
ce1e7a5afe ci: Check that allow-collaboration is checked for merge requests
This required for merging to be possible, so make the lack of this check
box being checked a discoverable error.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1586>
2020-11-20 17:44:59 +00:00
Jonas Ådahl
07c64ded78 ci: Use ci-fairy image in review and run first
This image is much smaller than the one with all the build dependencies,
thus will finish much faster.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1586>
2020-11-20 17:44:59 +00:00
Jonas Ådahl
efbb798309 ci: Use non-string like list for "need" relationships
Looks more natural, since it refers to another entity, not an arbitrary
string.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1586>
2020-11-20 17:44:59 +00:00
Daniel van Vugt
a793b4eef5 cogl: Add new 'sync-{primitive,frame}' options for COGL_DEBUG
This allows profilers to trace the callers of whatever is spending the
most time on the GPU, and to measure render times more accurately.
Previously such information was hidden as it completed in the
background (asynchronously) after we call swap buffers.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1327>
2020-11-20 17:30:55 +00:00
Daniel van Vugt
f78cfc0c80 clutter/stage-cogl: Don't paint the blue debug region where it's also red
When using CLUTTER_DEBUG_PAINT_DAMAGE_REGION, the blue swap region is
always a superset of the red redraw region. So painting both in full (since
the previous commit) just meant the red region was overdrawn and came out
purple. That doesn't provide enough visual contrast, changes the user
experience unexpectedly and reduces performance.

So just subtract the redraw region from the swap region. This way the
red redraw region is always red, not purple.

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1571>
2020-11-20 17:14:26 +00:00
Daniel van Vugt
96a185d8bc clutter/stage-cogl: Colour fb_clip_region in CLUTTER_DEBUG_PAINT_DAMAGE_REGION
Previously when CLUTTER_DEBUG_PAINT_DAMAGE_REGION was set, that would lead
to has_buffer_age==FALSE, which would lead to use_clipped_redraw==FALSE
which would mean swap_region was always empty. And so the blue region of
CLUTTER_DEBUG_PAINT_DAMAGE_REGION was always empty, *and* fb_clip_region
was always the full view rectangle which is not useful for debugging.

Now when CLUTTER_DEBUG_PAINT_DAMAGE_REGION is set, we don't let that
affect use_clipped_redraw, which means fb_clip_region is calculated
realistically.

But that's not enough. Calculating fb_clip_region properly with
CLUTTER_DEBUG_PAINT_DAMAGE_REGION would still lead to colouring artefacts
left on screen from previous frames that don't apply to the current frame.
So to fix that we also paint_stage for the whole screen every time when
using CLUTTER_DEBUG_PAINT_DAMAGE_REGION.

So now you will only ever see red and blue shading that's applicable to
the current frame, and no artefacts from the previous frames.

Fixes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1535
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1571>
2020-11-20 17:14:26 +00:00