Move some generic properties to the OutputLayer class and add a cursor
layer getter in the RenderBackend class. That allows us to get rid of
some code duplication. And we could use this work to move more cursor layer
code from backends to Compositor.
The goal is to create surface items for things that are not in the
workspace scene. RenderBackend perhaps is not a great place for these
factory functions. On the other hand, this change merely rewires code
from Scene to RenderBackend. I think that in distant future we could
make surface items pick surface texture type on their own, for what it's
worth that's what we would do in QtQuick.
Currently, output backends track the cursor behind the scenes. This
results in some amount of code duplication, for example the handling of
hidden cursors, every backend handles in its own unique way, some don't
do it correctly. Another issue is that output backend interact with
other components behind the back. This can be a problem for tasks such
as backing the cursor with an output layer.
This change introduces explicit output cursor manipulation APIs in the
Output class. There's a good chance that it's going to be revised more
in the future as part of streamlining output layer manipulation apis.
With the proposed changes, the workspace would need to call
Output::setCursor() or Output::moveCursor() to set/unset or move the
cursor, respectively.
If this function is useful to make sure we are properly aligned with the
output's pixels, we should start with the output's 0, otherwise we'll be
carrying over the rounding errors increasingly as our workspace grows.
BUG: 459373
Using OutputBackend::outputsQueried can cause problems because it's emitted
before output settings like enablement get adjusted to the new output configuration.
It also doesn't react to output changes initiated by KScreen and is in the
way of plans to use multiple output backends at the same time.
BUG: 461901
OutputBackend has a concept of readiness. When the host compositor goes
down, the OutputBackend will be marked as not ready, and when it
reappears, the output backend will be marked ready again.
On the other hand, host compositor going down is a niche case, it's not
something that often happens and it's hard to justify adding more moving
parts to the startup code. It's easier to call initialize() and check
whether it fails rather than call initialize() and then monitor isReady.
Therefore, this change drops OutputBackend::isReady() to make startup
simpler.
If the platform doesn't support setting gamma ramps, let the request
fail. In long term, we need a software fallback too so this property is
not that relevant.
It's odd to manipulate host cursor position and it's not highly
important, for example we haven't had a need to warp the cursor on
wayland.
The main motivation behind this change is to slim down the Platform to
make it more output oriented.
Due to being a compositor, kwin has to conform to some certain
interfaces. It means a lot of virtual functions and function tables to
integrate with C APIs. Naturally, we not always want to use every
argument in such functions.
Since we get -Wunused-parameter from -Wall, we have to plumb those
unused arguments in order to suppress compiler warnings at the moment.
However, I don't think that extra work is worth it. We cannot change or
alter prototypes in any way to fix the warning the desired way. Q_UNUSED
and similar macros are not good indicators of whether an argument is
used too, we tend to overlook putting or removing those macros. I've
also noticed that Q_UNUSED are not used to guide us with the removal no
longer needed parameters.
Therefore, I think it's worth adding -Wno-unused-parameter compiler
option to stop the compiler producing warnings about unused parameters.
It changes nothing except that we don't need to put Q_UNUSED anymore,
which can be really cumbersome sometimes. Note that it doesn't affect
unused variables, you'll still get a -Wunused-variable compiler warning
if a variable is unused.
The X11 standalone backend has an obscure fallback to hw screen
inversion if compositing is disabled. While it's great, it conflicts
with existing features such as night color.
In order to make code cleaner and clean up dependencies, this change
moves screen inversion shortcut to the invert effect. While it can
potentially affect users that don't use compositing, I think the number
of such affected people is very small.
In hindsight, preferring hw over sw transform is nice, but I think we
need to analyze it first and then come up with a proper solution that
integrates with color management and works great both on x11 and wayland.
With the addition of KGlobalAccel::globalShortcutActiveChanged(),
there's a way to monitor all triggered actions without adding any
boilerplate code.
This change removes the KGlobalAccel bits from the Platform class. This
reduces the amount of boilerplate code; currently we need to be careful
about ensuring that Platform::setupActionForKGlobalAccel() is called.
Another reason behind this change is to simplify the api of Platform and
remove things that don't have anything to do with outputs.
Use isNull on QSizeF to check for a zero delta instead of comparing it
with a default-constructed QSizeF, which in practice initializes to
(-1.0,-1.0). This caused relative motion events to be omitted if the
delta happened to be equal to (-1.0,-1.0), causing mouse jumping in some
applications.
BUG: 444510
Signed-off-by: John Brooks <john@fastquake.com>
The CI now has the ability to limit the passing unit test requirements
to more specific platform configurations, so the not yet working Qt 6
unit tests shouldn't block this anymore.
In libinput 1.19, three new pointer axis events were added in order to
provide support for high-resolution scrolling.
LIBINPUT_EVENT_POINTER_AXIS is de-facto deprecated and new users of
libinput should use instead SCROLL_WHEEL, SCROLL_FINGER, and
SCROLL_CONTINUOUS.
Discrete deltas were replaced with v120 delta values. 120 corresponds to
a single discrete delta. Smaller values correspond to "partial" wheel
ticks.
https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/72
Currently the Workspace processes output updates as they occur, e.g.
when the drm backend scans connectors, the Workspace will handle
hotplugged outputs one by one or if an output configuration changes the
mode of several outputs, the workspace will process output layout
updates one by one instead of handling it in one pass. The main reason
for the current behavior is simplicity.
However, that can create issues because it's possible that the output
layout will be temporarily in degenerate state and features such as
sticking windows to their outputs will be broken.
In order to fix that, this change makes the Workspace process batched
output updates. There are several challenges - disconnected outputs have
to be alive when the outputsQueried signal is emitted, the workspace
needs to determine what outputs have been added or removed on its own.
Placeholder outputs are not rendered so they don't need render data.
Also, this simplifies the control flow when the last real output is
removed. The Platform::screensQueried signal won't be emitted inside a
Platform::screensQueried slot.
Things such as Output, InputDevice and so on are made to be
multi-purpose. In order to make this separation more clear, this change
moves that code in the core directory. Some things still link to the
abstraction level above (kwin), they can be tackled in future refactors.
Ideally code in core/ should depend either on other code in core/ or
system libs.
