For actors which don't have needs_allocation set to TRUE and where the
new allocation wouldn't be different from the old one, the allocate()
vfunc doesn't have to be called. We still did this in case a parent
actor was moved though (so the absolute origin changed), because we
needed to propagate the ABSOLUTE_ORIGIN_CHANGED allocation flag down to
all actors.
Since that flag is now removed and got replaced with a private property,
we can simply notify the children about the absolute allocation change
using the existing infrastructure and safely stop allocating children at
this point.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247
With commit 0eab73dc2e we introduced an optimization of not doing
allocations for actors which are hidden. This broke the propagation of
absolute origin changes to hidden actors, so if an actor is moved while
its child is hidden, the child will not get
priv->needs_compute_resource_scale set to TRUE, which means the resource
scale won't be updated when the child gets mapped and shown again.
Since we now have priv->absolute_origin_changed, we can simply check
whether that is TRUE for our parent before bailing out of
clutter_actor_allocate() and if it is, notify the whole hidden sub-tree
about the absolute origin change.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247
Since clutter_stage_set_viewport() is only used inside clutter-stage.c
anyway, we can make it a static method. Also we can remove the x and y
arguments from it since they're always set to 0 anyway.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247
When getting the last allocation using
clutter_actor_get_allocation_box(), Clutter will do an immediate
relayout of the stage in case an actor has an invalid allocation. Since
the allocation is always invalid when the allocate() vfunc is called,
clutter_stage_allocate() always forces another allocation cycle.
To fix that, stop comparing the old allocation to the new one to find
out whether the viewport changed, but instead use the existing check in
_clutter_stage_set_viewport() and implement the behavior of rounding the
viewport to the nearest int using roundf() (which should behave just as
CLUTTER_NEARBYINT()) since we're passing around floats anyway.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247
When manipulating the allocation of a ClutterActor from an allocate()
vfunc override, clutter_actor_set_allocation() is used to let Clutter
know about the changes.
If the actors allocation or its absolute origin did not change before
that, this can also affect the actors absolute_origin_changed property
used by the children to detect changes to their absolute position.
So fix this bug (which luckily didn't seem to affect us so far) and set
priv->absolute_origin_changed to TRUE in case the origin changes inside
clutter_actor_set_allocation_internal(). Since this function is always
called when our allocation changes, we no longer need to update
absolute_origin_changed in clutter_actor_allocate() now.
Since a change to the absolute origin always affects the resource scale,
too, we also need to move that check from clutter_actor_allocate() here
to make sure we update the resource scale.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247
Since the introduction of the shallow relayout functionality it's
possible to start an allocation cycle at any point in the tree, not only
at the stage. Now when starting an allocation at an actor that's not the
stage, we'd still look at the absolute_origin_changed property of this
actors parent, which might still be set to TRUE from the parents last
allocation.
So avoid using the parents absolute_origin_changed property from the
last allocation in case a shallow relayout is being done and always
reset the absolute_origin_changed property to FALSE after the allocation
cycle.
This broke with the removal of the ABSOLUTE_ORIGIN_CHANGED
ClutterAllocationFlag that was done in commit dc8e5c7f.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1247
This cannot be made to work reliably. Some factoids:
- Internal devices may be connected via USB.
- The ACPI spec provides the _PLD (Physical location of device) hook to
determine how is an USB device connected, with an anecdotal success
rate. Internal devices may be seen as external and vice-versa, there is
also an "unknown" value that is widely used.
- There may be non-USB keyboards, the old "AT Translated Set 2 Keyboard"
interface does not change on hotplugging.
- Libinput has an internal series of quirks to classify keyboards as
internal of external, also with an "unknown" value.
These heuristics are kinda hopeless to get right by our own hand. Drop
this external keyboard detection in the hope that there will be something
more deterministic to rely on in the future (e.g. the libinput quirks
made available to us directly or indirectly).
Fixes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2378
Related: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/2353https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1277
In clutter_text_queue_redraw_or_relayout() we check whether the size
of the layout has changed and queue a relayout if it did, otherwise we
only queue a redraw and save some resources.
The current check for this also queues a redraw if the actor has no
valid allocation. That seems right on the first glance since the actor
will be allocated anyway, but we actually want to call
clutter_actor_queue_relayout() again here because that also invalidates
the size cache of the actor which might have been updated and marked
valid in the meantime.
So make sure the size cache is always properly invalidated after the
size of the layout changed and also call clutter_actor_queue_relayout()
in case the actor has no allocation.
This fixes a bug where getting the preferred width of a non-allocated
ClutterText, then changing the string of the ClutterText, and then
getting the preferred width again would return the old cached width (the
width before we changed the string).
The only place where this bug is currently happening is in the overview,
where we call get_preferred_width() on the unallocated ClutterText of
the window clone title: When the window title changes while the
ClutterText is unallocated the size of the title is going to be wrong
and the text might end up ellipsized or too large.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1150
It's effectively used by mutter by abusing a ClutterTimeline to scedule
updates. Timelines are not really suited in places that is done, as it
is really just about getting a single new update scheduled whenever
suitable, so expose the API so we can use it directly.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1218
We could call clutter_stage_schedule_update() and it wouldn't actually
schedule anything, as the master frame clock only tries to reschedule if
1) there is an active timeline, 2) there are pending relayouts, 3) there
are pending redraws, or 4) there are pending events. Thus, a call to
clutter_stage_schedule_update() didn't have any effect if it was called
at the wrong time.
Fix this by adding a boolean state "needs_update" to the stage, set on
clutter_stage_schedule_update() and cleared on
_clutter_stage_do_update(), that will make the master clock reschedule
an update if it is TRUE.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1218
We need to use the framebuffer of the view instead of the onscreen
framebuffer when painting the damage region, otherwise the redraw clips
on rotated monitors won't be shown correctly.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
Compare, tile by tile, whether actual damage actually changed any
pixels. While this requires mmap():ing DMA buffers and comparing their
content, we should only ever use shadow buffers when we're using the
software renderer, meaning mmap() is cheap as it doesn't involve any
downloading.
This works by making the shadow framebuffer double buffered, while
keeping track of damage history. When we're about to swap the onscreen
buffer, we compare what part of the posted damage actually changed,
records that into a damage history, then given the onscreen buffer age,
collect all actual damage for that age. The intersection of these tiles,
and the actual damage, is then used when blitting the shadow buffer to
the onscreen framebuffer.
Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1157https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
Move the damage history tracking to a new ClutterDamageHistory helper
type. The aim is to be able to track damage history elsewhere without
reimplementing the data structure and tracking logic.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
This fixes the last "copy everything" paths when clutter doesn't
directly paint onto the onscreen framebuffer. It adds a new hook into
the stage view called before the swap buffer, as at this point, we have
the swap buffer damag regions ready, which corresponds to the regions we
must blit according to the damage reported to clutter.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
The rest didn't change, so only actually paint the part of the offscreen
that was composited as part of the stage painting. In practice, this
means that, unless a shadow buffer is used, we now only paint the
damaged part of the stage, and copy the damage part of the offscreen to
the onscreen.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
We failed to use the buffer age when monitors were rotated, as when they
are, we first composite to an offscreen framebuffer, then later again to
the onscreen. The buffer age checking happened on the offscreen, and an
offscreen being single buffered, they can't possible support buffer
ages.
Instead, move the buffer age check to check the actual onscreen
framebuffer. The offscreen to onscreen painting is still always full
frame, but that will be fixed in a later commit.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
The manual "cleaning" of the viewport and projection state is removed,
and we only ever try to invalidate the state so that it'll be updated
next time. Change the API used to reflect this.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
The stage would fetch the front framebuffer and set the viewport and
projection matrix, but if we are going to more than one front buffer,
that won't work, so let the stage just pass the viewport and projection
matrix to the view and have the view deal with the framebuffer(s).
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
Will be used for logging to identify what view a log entry concerns. For
the native and nested backend this is the name of the output the CRTC is
assigned to drive; for X11 it's just "X11 screen", and for the legacy
"X11 screen" emulation mode of the nested backend it's called "legacy
nested".
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237
All existing users of clutter_actor_has_mapped_clones() actually want to
know whether the actor is being cloned by a visible clone, it doesn't
matter to them if that clone is attached to an actor somewhere else in
the tree or to the actor itself.
So make clutter_actor_has_mapped_clones() a bit more convenient to use
and also check the clones of the parent-actors in that function.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1235
The comment in _clutter_actor_get_allocation_clip() explicitely notices
that it doesn't need the behavior of doing an immediate relayout as
clutter_actor_get_allocation_box() does. The comment is also still valid
since the code calling _clutter_actor_get_allocation_clip() checks for
priv->needs_allocation just before.
So let's just use the allocation directly here instead of going through
that function.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1264
ClutterBoxLayout's layout policy of using the generic ClutterActor
align/expand properties for children that are expanded and a custom
meta otherwise is confusing, in particular as the x-fill/y-fill
defaults don't match the default CLUTTER_ACTOR_ALIGN_FILL align.
StBoxLayout's own custom child meta (which was deprecated last
cycle) is probably the only consumer. And luckily, the St meta
uses different x-fill/y-fill default that match the ClutterActor
defaults, so removing it will not affect code that doesn't use
the deprecated properties themselves.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1265
This stuff has been deprecated for a very long time, and given that
ClutterBoxLayout is most commonly used via StBoxLayout, the impact of
removing it should be low. It will however open the door to further
cleanups.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1265
We're going to remove the "allocation-changed" signal from ClutterActor
since it's no longer needed now that ClutterAllocationFlags are gone.
So listen to "notify-allocation" instead, which has been the recommended
thing to do for some time now anyway.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1245
The ABSOLUTE_ORIGIN_CHANGED allocation flag is only really useful to
propagate the information of the absolute origin of an actor having
changed inside Clutter. It wasn't used anywhere else besides for some
debug messages and it probably shouldn't be used in custom layout
implementations anyway since 1) actors shouldn't have to be aware of
absolute allocation changes and 2) it doesn't factor in changes to the
transformation matrix of a parent.
Also the propagation of absolute origin changes using this flag broke
with commit 0eab73dc2e and now hidden actors are no longer notified
about those changes.
Additionally, this flag gets in the way of a few potential optimizations
since it has to be propagated even if the allocation box of the child
hasn't changed, forcing a reallocation of the child.
So replace this flag with a simple new private property of ClutterActor
absolute_origin_changed, but keep the exact same behavior for now.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1245
Since we now only layout the children ourselves in case the actor
implementation doesn't override the allocate vfunc, we can remove
clutter_actor_maybe_layout_children() and move the functionality inside
clutter_actor_real_allocate().
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1245
Now that we no longer have the DELEGATE_LAYOUT we expect all actors
overriding the allocate() vfunc to allocate their children themselves.
Since clutter_actor_set_allocation() is only called from custom
vfunc_allocate() implementations, the condition in
clutter_actor_maybe_layout_children() would always fail, which makes
calling the function useless anyway.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1245
The CLUTTER_DELEGATE_LAYOUT flag is unintuitive and makes the allocation
process inside Clutter unnecessarily complicated. It's very easy for
actors overriding the allocate() vfunc to layout their children
themselves (in fact most of them do this), and it also never made sense
that clutter_actor_set_allocation() does eventually layout children.
There was no ClutterActor implementation in mutter or gnome-shell which
actually used the DELEGATE_LAYOUT flag, but even without it, it's fairly
easy to archive the same behavior now: In the allocate() override,
adjust the allocation as wanted, then chain up to the parent vfunc
without calling clutter_actor_set_allocation().
So remove the CLUTTER_DELEGATE_LAYOUT flag, which will allow making the
relayout code in Clutter a bit easier to follow.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1245
We're going to remove allocation flags, so stop depending on the
DELEGATE_LAYOUT flag in ClutterStage and call
clutter_layout_manager_allocate() directly, which is pretty
straightforward.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1245
The public API to get the parent actor, clutter_actor_get_parent() does
a type check whether the actor is actually a ClutterActor. In case of
_clutter_actor_apply_relative_transformation_matrix(), which is called
recursively and very often during the paint process, this type check
shows up with almost twice the amount of hits than the actual matrix
multiplication.
So use the parent pointer directly in some code paths that are executed
very often and avoid the expensive type checking there, we can do that
since both places are not public API.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1259
Reverting the scale and offset applied to the damage history can be done
in one step, using a few less temporary allocations by passing the
offset right away to a new scale_offset_and_clamp_region() function.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
Since the damage history region is tracked per-view, all the regions it
includes should be inside the current view anyway, so don't
unnecessarily intersect that region with the view.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
Since we now check for the buffer age before setting up the
fb_clip_region, that region will be set to the full extents of the view
in case the buffer age is invalid. This in turn means we don't have to
do this again later and can simply fill the damage history with the
fb_clip_region that's already set for us.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
Since a NULL redraw_clip means that a full view redraw should be done
and an empty redraw clip may never be set (see the width/height checks
in clutter_stage_view_add_redraw_clip()), the fb_clip_region should
always be set to a reasonable region that's either the whole view or
individual regions inside the view.
So make sure that's actually the case by warning and that the
fb_clip_region isn't empty, which allows dropping another few lines of
code.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
Right now we're checking for the DISABLE_CLIPPED_REDRAWS debug flag
after creating the fb_clip_region and adjusting the redraw_clip. That
means that if may_use_clipped_redraw was TRUE, the redraw_clip will
still be set to the region and thus cause the stage to only be partially
redrawn. Since we don't push a clip to the framebuffer though
(use_clipped_redraw is now FALSE), parts of the view will get corrupted.
To fix that, disable clipped redraws right away if the debug flag is
set. This also allows removing the may_use_clipped_redraw bool and
replacing it entirely with use_clipped_redraw.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
We already have a better way to paint the redraw clip: Painting the
damage region paints the individual rects of the clip region and not
only the bounding rect.
So stop painting an outline around the redraw clip bounding rect when
CLUTTER_DEBUG_REDRAWS is set.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
While this is meant as an optimzation to only use the scissor clip and
not the stencil buffer if there's only one clip rectangle, it's not
needed since this optimization is going to be applied to region clips
anyway inside _cogl_clip_stack_gl_flush() (see cogl-clip-stack-gl.c).
So remove the unnecessary optimization here and rely on cogl-clip-stack
to do it for us.
https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1113
