Since commit 6183eb3632 we disabled swap
throttling in favour of being driven by the GDK frame clock (and thus by
the compositor).
Compositors may decide to unredirect full screen windows to avoid the
performance penalty of the additional copy, especially on X11, which
means that a Clutter application marked as full screen is not going to
be driven by the compositor, and it's not going to be throttled by the
underlying GL machinery. This has a performance impact on constrained
platforms.
For this reason, we should re-enable swap throttling when the window is
full screen.
As the change was introduced especially because of Wayland, we should
check that we're not running as clients under a Wayland compositor; if
we do, we always keep swap throttling disabled, as the compositor will
always manage our output, even when full screen.
Those can be used to implement different scrolling behaviors.
The fields have been added to ClutterScrollEvent itself. According
to pahole, this makes the struct as big as ClutterButtonEvent and
ClutterTouchEvent, so already at the limit of the ClutterEvent
union.
https://bugzilla.gnome.org/show_bug.cgi?id=757026
We should allow a configuration file to set up the initial state of the
global state, which also implies being able to set the backend.
If the allowed backends have already been set programmatically via the
clutter_set_windowing_backend(), though, then the application code takes
precedence, as we assume that the application author knows better than
us what their code supports or requires.
The configuration file should set up the global state before we
initialize it; instead of relying on implicit ordering, explicitly read
the configuration file once, when creating the global shared context
data structure.
Like CLUTTER_DRIVER, we want to allow users to specify a list of
backends to test, and fall back to the internally defined priority as a
default.
This requires changing the way the allowed backend string is parsed,
both for the CLUTTER_BACKEND environment variable and for the
clutter_set_windowing_backend() function. Existing callers are still
supported with the exact same semantics.
Using environment variables only is not convenient for all platforms,
and in some cases it's beneficial to decide the default driver when
building Clutter. Cogl already has a similar configuration switch, and
since Clutter is overriding the default Cogl behaviour, it should offer
the same mechanism.
https://bugzilla.gnome.org/show_bug.cgi?id=742678
We have an hardcoded list of drivers we have to go through when creating
a Cogl context. Some platforms may expose those drivers, but not be the
preferred ones.
In order to allow users and system integrators to override the list of
drivers, we should crib the same approach used by GDK, and have an
environment variable with a list of drivers to try.
The new environment variable is called `CLUTTER_DRIVER` and accepts a
comma-separated list of driver names, which will be tested in sequence
until one succeeds. There's also an additional '*' token which is used
to ask Clutter to fall back to the internally defined preferred list of
drivers.
https://bugzilla.gnome.org/show_bug.cgi?id=742678
Being able to select text and being able to edit text are two separate
capabilities, but ClutterText only allows the former with the latter.
The ClutterText:selectable property is set to TRUE by default, given
that it depends on the :editable property; this implies that all
ClutterText instances now are going to show a cursor as soon as they get
key focused. Obviously, this would make labels look a bit off — but if
you have a label then you would not give it key focus, either by
explicitly calling clutter_actor_grab_focus(), or by setting it as
reactive and allowing it to be clicked.
If this turns out to be a problem, we have various ways to avoid showing
a cursor — for instance, we could change the default value of the
selectable property, and ensure that setting the :editable property to
TRUE would also set the :selectable property as a side effect. Or we
could hide the cursor until the first button/touch press event. Finally,
we could always back this commit out if it proves to be too much of a
breakage for existing code bases.
https://bugzilla.gnome.org/show_bug.cgi?id=757470
The X11 part of the GDK backend takes into account the scaling factor of its
window when resizing the underlying X11 objects. We need to do the same for
Wayland.
https://bugzilla.gnome.org/show_bug.cgi?id=755245
This is now stored as platform data in the ClutterEvent, so can
be retrieved with the clutter_evdev_event_get_event_code() call
that's been added to the evdev backend.
https://bugzilla.gnome.org/show_bug.cgi?id=758238
Device managers can now implement the ClutterEventExtender interface
that allows them to set their own data to events, make the backend call
those implementations if the device manager implements the interface.
https://bugzilla.gnome.org/show_bug.cgi?id=758238
This normally belonged to the ClutterBackend, however there's device
managers (eg. evdev) that are somewhat detached from the backend, so
need to bridge this somehow.
This allows device managers to implement these bits that were usually
responsibility of the ClutterBackend.
https://bugzilla.gnome.org/show_bug.cgi?id=758238
On X11 those were skipped, so additional pointer buttons would come up
as button >= 8 events. Do here the same, so we remain compatible across
backends.
https://bugzilla.gnome.org/show_bug.cgi?id=758237
There's handlers around relying on up/down/left/right scroll events,
which won't work as expected if only smooth scroll events are sent.
In order to work properly there, we have to retrofit discrete scroll
events on the evdev backend.
Fix this by implementing emission (on devices with a wheel) and
emulation (on anything else) of discrete scroll events. On the former
both smooth and discrete events are set, for the latter we do accumulate
the dx/dy of the latest scroll events, and emit discrete ones when we
accumulated enough. The ending 0/0 event will reset the accumulators for
the next scrolling batch.
https://bugzilla.gnome.org/show_bug.cgi?id=756284
When enable_paint_unmapped is disabled, we shouldn't force the
source widget to be unmapped if the constraints would keep it
mapped; in practice this shouldn't matter unless a paint handler
is messing with the map state.
https://bugzilla.gnome.org/show_bug.cgi?id=745517
Enable animation updates from the GdkFrameClock whenever any timeline is
added to the ClutterMasterClockGdk. This may improve animation
smoothness (depending on the GDK backend in use) because it allows GDK
to tweak its frame timing for animation purposes.
https://bugzilla.gnome.org/show_bug.cgi?id=755357
This is how GdkFrameClock is meant to be used: the frame time is meant
to be queried from the GdkFrameClock within its frame signals, rather
from the system monotonic time source.
https://bugzilla.gnome.org/show_bug.cgi?id=755357
When removing the frame callback on the CoglOnscreen, we loose the ability
to get notified of swap events. This could leave us with a counter != 0
which leads to a deadlock situation after the next realize/draw cycle.
https://bugzilla.gnome.org/show_bug.cgi?id=755014
If we call _clutter_stage_do_update() on a ClutterStage that isn't
mapped/visible, no GL command will be queued, and the Mesa/DRI2
implementation of SwapBuffers will do nothing. This causes
GLX_INTEL_swap_event to not be emitted by the X server because no swapping
has been requested through DRI2 and it eventually leads to a deadlock
situation in ClutterStageCogl because we're waiting for an event before we
start the next draw cycle.
This patch removes the non mapped stages from the list of stages to process.
This is consistent with a previous patch for the ClutterMasterClockGdk [1].
[1] : 5733ad58e5https://bugzilla.gnome.org/show_bug.cgi?id=755014
Setting up the sync_to_vblank in the MasterClock is a bit too late as
the MasterClock can be created after a StageWindow has been created
and realized (and therefore all of its Cogl/GL state setup already).
So move the setup to the backend, prior to any StageWindow creation.
https://bugzilla.gnome.org/show_bug.cgi?id=754938
Clutter still uses part of the deprecated stateful API of Cogl (in
particulart cogl_set_framebuffer). It means Cogl can keep an internal
reference to the onscreen object we rendered to. In the case of
foreign window, we want to avoid this, as we don't know what's going
to happen to that window.
This change sets the current Cogl framebuffer to a dummy 1x1
framebuffer if the current Cogl framebuffer is the one we're
unrealizing.
https://bugzilla.gnome.org/show_bug.cgi?id=754890
We're currently hooked to the "update" signal of the FrameClock. When
embedding Clutter inside GTK+ we want to have the layout phase of GTK+
to notify us the size of our stage.
This patch change to FrameClock signal we're listening to, to the
"paint" signal to make sure we've received the layout information from
GTK+, before painting. Otherwise we paint with a delay of one frame.
https://bugzilla.gnome.org/show_bug.cgi?id=754889
The commit 6cd24faaa5 (actor: Clean up
transform_stage_point()) changed the validation of the transformation
matrix to ignore the fraction part of the determinant. This caused
clutter_actor_transform_stage_point() to fail and return FALSE for
actors which scale was less than 1.
Previously the validation was ('det' being a float):
det = (RQ[0][0] * ST[0][0])
+ (RQ[0][1] * ST[0][1])
+ (RQ[0][2] * ST[0][2]);
if (!det)
return FALSE;
Semantically, the if statement expression '!det' is equivalent to
'det == 0', i.e. 'det == 0.0f'. Post cleanup patches, 'det' was turned
into a double, and the if statement was changed to:
if (CLUTTER_NEARBYINT (det) == 0)
return FALSE;
which, different from before, rounds the determinant to the nearest
integer value, meaning determinant in the range (-0.5, 0.5) would be
considered invalid.
This patch reverts this part to the old behavior, while, because of the
inexact nature of floating point arithmetics, allowing a bit more liberal
meaning of "equals to 0" than '== 0.0'.
https://bugzilla.gnome.org/show_bug.cgi?id=754766
