Commit graph

81 commits

Author SHA1 Message Date
Vlad Zahorodnii
b8a70e62d5 Introduce RenderLoop
At the moment, our frame scheduling infrastructure is still heavily
based on Xinerama-style rendering. Specifically, we assume that painting
is driven by a single timer, etc.

This change introduces a new type - RenderLoop. Its main purpose is to
drive compositing on a specific output, or in case of X11, on the
overlay window.

With RenderLoop, compositing is synchronized to vblank events. It
exposes the last and the next estimated presentation timestamp. The
expected presentation timestamp can be used by effects to ensure that
animations are synchronized with the upcoming vblank event.

On Wayland, every outputs has its own render loop. On X11, per screen
rendering is not possible, therefore the platform exposes the render
loop for the overlay window. Ideally, the Scene has to expose the
RenderLoop, but as the first step towards better compositing scheduling
it's good as is for the time being.

The RenderLoop tries to minimize the latency by delaying compositing as
close as possible to the next vblank event. One tricky thing about it is
that if compositing is too close to the next vblank event, animations
may become a little bit choppy. However, increasing the latency reduces
the choppiness.

Given that, there is no any "silver bullet" solution for the choppiness
issue, a new option has been added in the Compositing KCM to specify the
amount of latency. By default, it's "Medium," but if a user is not
satisfied with the upstream default, they can tweak it.
2021-01-06 16:59:29 +00:00
Vlad Zahorodnii
ef6fa25d90 platforms/x11: Split out the EGL for X11 backend
EGL for X and EGL for Wayland backends are quite different. The main
motivation behind this change is to prepare the EGL backends for
monitoring vblank events. Things work quite differently depending on
if the EGL backend renders onto a toplevel window or overlay window.
2021-01-06 16:59:29 +00:00
Vlad Zahorodnii
0ceff5fd24 Swap buffers after finishing a compositing cycle
The compositing timing algorithm assumes that glXSwapBuffers() and
eglSwapBuffers() block. While this was true long time ago with NVIDIA
drivers, nowadays, it's not the case. The NVIDIA driver queues
several buffers in advance and if the application runs out of them,
it will block. With Mesa driver, swapping buffer was never blocking.

This change makes the render backends swap buffers right after ending
a compositing cycle. This may potentially block, but it shouldn't be
an issue with modern drivers. In case it gets proven, we can move
glXSwapBuffers() and eglSwapBuffers() in a separate thread.

Note that this change breaks the compositing timing algorithm, but
it's already sort of broken with Mesa drivers.
2021-01-06 16:59:29 +00:00
Vlad Zahorodnii
6adfe3064f Drop Platform::createScreens()
Since the Screens class is a convenience wrapper around AbstractOutput
objects that come from the Platform, it should not be platform-specific.

By dropping createScreens(), output-related code becomes simpler.
2020-12-21 09:20:16 +00:00
Vlad Zahorodnii
79ca5ccd26 Merge OutputScreens into Screens
Since all platforms have been ported to AbstractOutput, OutputScreens
can be merged into Screens. This simplifies the class hierarchy.
2020-12-17 13:36:30 +00:00
Vlad Zahorodnii
8e060e7218 Prepare kwin for compiling with EGL_NO_PLATFORM_SPECIFIC_TYPES 2020-12-10 10:54:45 +02:00
Vlad Zahorodnii
5943eea4c9 Introduce Platform::{outputEnabled,outputDisabled} signals
These signals can be useful if you want to know what output exactly has
been disabled or enabled.

The outputEnabled signal is emitted after the outputAdded signal, and
the outputDisabled signal is emitted before the outputRemoved signal.
2020-12-09 17:44:00 +00:00
Vlad Zahorodnii
94201cbadd Remove unused signal in Platform 2020-12-09 16:54:15 +02:00
David Edmundson
1e2f2a28c7 Port to kwayland-server socket changes 2020-12-09 07:23:40 +00:00
Vlad Zahorodnii
2d5482b013 plugins/x11: Emit outputAdded and outputRemoved
Currently, these two signals are emitted primarily only on Wayland, but
in order to have consistent core API, it's better to emit them on X11 too.
2020-12-02 20:51:14 +02:00
Vlad Zahorodnii
017528956b Move Scene::isPerScreenRenderingEnabled() to Platform
This way the Compositor can know if per screen rendering is enabled
before creating the Scene.
2020-12-02 15:32:30 +00:00
Vlad Zahorodnii
b94c876597 Fix crash in eglTerminate()
At the moment, the gbm_device for the primary device is destroyed before
the EGLDisplay is destroyed. This results in a crash in Mesa.

In order to fix the crash, this change ensures that the EGLDisplay is
destroyed before the gbm device.
2020-12-02 15:32:02 +00:00
Vlad Zahorodnii
f26eeb9706 Use consistent naming for begin/end frame hooks
Currently, the OpenGLBackend and the QPainterBackend have hooks to
indicate the start and the end of compositing cycle, but in both cases,
the hooks have different names. This change fixes that inconsistency.
2020-11-12 09:14:57 +02:00
Vlad Zahorodnii
76303888ab Unify begin/end frame hooks in OpenGLBackend 2020-11-12 09:14:54 +02:00
Vlad Zahorodnii
755dd81e49 Refactor how per screen rendering is handled
In order to allow per screen rendering, we need the Compositor to be
able to drive rendering on each screen. Currently, it's not possible
because Scene::paint() paints all screen.

With this change, the Compositor will be able to ask the Scene to paint
only a screen with the specific id.
2020-11-11 22:03:45 +02:00
Vlad Zahorodnii
94b731c196 Prepare QPainter render backend for per screen rendering 2020-11-11 07:22:10 +00:00
Vlad Zahorodnii
edfb0a3fd9 Drop support for X11 overlay windows in QPainter render backend
It's unused.
2020-11-11 07:22:10 +00:00
Aleix Pol
f9becf8085 wayland: Make sure EDID are being fed to wayland outputs
At the moment, despite the protocol supporting it, we were not feeding
the EDIDs. KScreen was falling back to the output name so it didn't fail
horribly but it's still a good idea to provide all the data.
2020-10-29 14:57:50 +00:00
Vlad Zahorodnii
9b09f0399f Mark the cursor as rendered after performing compositing
If a cursor animation is driven purely by frame callbacks and kwin
uses hardware cursors, the cpu usage may spike to 100%.

This change addresses that issue by sending frame callbacks after a
compositing cycle has been performed.
2020-10-26 10:02:17 +02:00
l10n daemon script
30b516eceb SVN_SILENT made messages (.desktop file) - always resolve ours
In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"
2020-09-30 06:16:48 +02:00
Vlad Zahorodnii
4ce853e8e4 Prettify license headers 2020-08-07 19:57:56 +00:00
Vlad Zahorodnii
1fb9f6f13a Switch to SPDX license markers
The main advantage of SPDX license identifiers over the traditional
license headers is that it's more difficult to overlook inappropriate
licenses for kwin, for example GPL 3. We also don't have to copy a
lot of boilerplate text.

In order to create this change, I ran licensedigger -r -c from the
toplevel source directory.
2020-08-07 19:57:56 +00:00
l10n daemon script
c10fe06d06 SVN_SILENT made messages (.desktop file) - always resolve ours
In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"
2020-06-18 05:44:57 +02:00
l10n daemon script
0e117c49a1 SVN_SILENT made messages (.desktop file) - always resolve ours
In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"
2020-06-17 14:12:29 +02:00
l10n daemon script
29915632df SVN_SILENT made messages (.desktop file) - always resolve ours
In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"
2020-06-04 05:12:36 +02:00
David Edmundson
3092043be5 [platforms/x11] Fix valigrind warning copying window icon for windowed mode
Summary:
windowIcon.pixmap().bits() creates and deletes the QPixmap object.

Which means data is dangling when we call m_winInfo->setIcon()

Surprisingly harmless in real life.

Test Plan: Reran kwin_wayland on X11 with valigrind

Reviewers: #kwin, apol

Reviewed By: apol

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28667
2020-05-01 16:13:40 +01:00
Aleix Pol
3a9d7a6e9d Port KWin to KWaylandServer
Summary: Away from KWayland::Server and KF5WaylandServer.

Test Plan: Builds, ran nested session

Reviewers: #kwin, #plasma, #frameworks, davidedmundson, zzag

Reviewed By: #kwin, #plasma, davidedmundson, zzag

Subscribers: zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D29278
2020-04-30 12:56:08 +02:00
David Edmundson
a13ecf8d0e [wayland] Add new XdgOutput properties
Summary:
AbstractOutput::name() behaviour is changed so that it matches the X11
behaviour, showing an identifier like "HDMI-0".

XdgOutput.name is set to this name.

XdgOutput.description is currently set to the manufacturer name and
model, but it's not exposed to Qt so we probably don't care too much.

This should fix plasmashell changing applets when switching between X11
and wayland.

Test Plan:
Relevant unit test
I still need to run it on my laptop.

Reviewers: #kwin, #plasma, zzag

Reviewed By: #kwin, #plasma, zzag

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28230
2020-04-08 10:39:59 +01:00
Aleix Pol
6abd23ed02 Make it possible to have a separate cursor for the tablet
Summary:
As is KWin only had 1 Cursor which was a singleton. This made it impossible for
us to properly implement the tablet (as in drawing tablets) support and show where
we're drawing.
This patch makes it possible to have different Cursors in KWin, it makes all the
current code still follow the mouse but the tablet can still render a cursor.

Test Plan: Tests pass, been using it and works as well as before but with beautiful tablet cursors.

Reviewers: #kwin, cblack, davidedmundson

Reviewed By: #kwin, cblack, davidedmundson

Subscribers: davidedmundson, cblack, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D28155
2020-04-03 01:16:45 +02:00
Vlad Zahorodnii
dcf91d4321 Cleanup style in CMakeLists.txt files
We have lots of inconsistency at the moment in CMakeLists.txt files. Most
of it is due to kwin being a very old project. This change hopefully fixes
all of it.
2019-09-17 16:03:05 +03:00
Carl Schwan
0757a60858
Fix compile failure window variable doesn't exist
Summary:
Error was:
```
/home/carl/kdesrc/kde/workspace/kwin/plugins/platforms/x11/windowed/x11windowed_output.cpp: In member function ‘void KWin::X11WindowedOutput::initXInputForWindow()’:
/home/carl/kdesrc/kde/workspace/kwin/plugins/platforms/x11/windowed/x11windowed_output.cpp:134:14: error: invalid use of non-static member function ‘xcb_window_t KWin::X11WindowedOutput::window() const’
  134 |     Q_UNUSED(window)
      |              ^~~~~~
In file included from /home/carl/kdesrc/kde/workspace/kwin/plugins/platforms/x11/windowed/x11windowed_output.cpp:20:
/home/carl/kdesrc/kde/workspace/kwin/plugins/platforms/x11/windowed/x11windowed_output.h:50:18: note: declared here
   50 |     xcb_window_t window() const {
      |
```

Reviewers: #kwin, romangg

Reviewed By: #kwin, romangg

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D23957
2019-09-15 13:00:26 +02:00
Vlad Zahorodnii
02209aa8a4 [platforms/x11] Get rid of some code duplication in windowed backend
Summary:
We repeat quite a lot of code that finds an output by xcb_window_t and
translates global X11 screen coordinates to output coordinates.

Test Plan: Compiles.

Reviewers: #kwin, gladhorn

Reviewed By: #kwin, gladhorn

Subscribers: gladhorn, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D23947
2019-09-15 00:16:33 +03:00
Roman Gilg
b3e7664d2c Replace Wayland/XDG outputs checks with enablement checks
Summary:
Make it more explicit what the relation is between Wayland and XDG objects
existing and enablement:

The ouput is enabled if and only if Wayland and XDG output objects exist.

We can simplify the code by replacing checks on the outputs with checking
the current enablement value.

Test Plan: Wayland nested and virtual backends.

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D23553
2019-09-05 17:29:08 +02:00
Roman Gilg
836f88495b [platforms/x11/windowed] Fix output scale access before output device creation 2019-08-28 22:27:22 +02:00
Roman Gilg
ae55e37660 Fix variable unused warning 2019-08-28 18:10:24 +02:00
Roman Gilg
5cc626c102 Remove outputs handling alternative
Summary:
With f013a4369c, cd6b69a4d2, d960be4b3f and edb200f6bc all possible
backends of a Wayland session have been ported to using the internal functions
of AbstractWaylandOutput's for managing outputs.

This removes the alternative code path used before in these backends, what
simplifies the code and is also a prerequisite to removing the Screens global
in the future.

Reviewers: #kwin, apol, zzag

Reviewed By: #kwin, apol, zzag

Subscribers: apol, kwin

Tags: #kwin

Maniphest Tasks: T11459, T11098

Differential Revision: https://phabricator.kde.org/D23485
2019-08-28 15:00:39 +02:00
Roman Gilg
331f5d7da7 Get output physical size from output device
Summary:
Get the physical size directly from the always available output device
interface instead of saving an additional copy in the abstract wayland
output class.

There is some ambiguity with orientation and naming that needs to be
cleaned up when output orientation is reworked.

Test Plan: Nested Wayland, Drm, virtual backends tested.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Maniphest Tasks: T11459

Differential Revision: https://phabricator.kde.org/D23496
2019-08-28 14:56:26 +02:00
Roman Gilg
dbb2cede08 Get output pixel size from output device
Summary:
Get the pixel size directly from the always available output device
interface instead of saving an additional copy in the backends.

Test Plan: Nested Wayland, Drm, virtual backends tested.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Maniphest Tasks: T11459

Differential Revision: https://phabricator.kde.org/D23495
2019-08-28 14:54:14 +02:00
Roman Gilg
edb200f6bc [platforms/x11/windowed] Create output devices
Summary: Create output devices in X11 nested Wayland session.

Test Plan: Started nested session in X11. KScreen showed output.

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Maniphest Tasks: T11459

Differential Revision: https://phabricator.kde.org/D23479
2019-08-27 12:33:09 +02:00
Vlad Zagorodniy
684b4b635e Use more traditional doxygen style
Summary:
So far we were following a bit unique and rare doxygen comment style:

    /**
     * Contents of the comment.
     **/

Doxygen comments with this style look balanced and neat, but many people
that contribute to KWin don't follow this style. Instead, they prefer
more traditional doxygen comment style, i.e.

    /**
     * Contents of the comment.
     */

Reviewing such changes has been a bit frustrating for me (so selfish!)
and for other contributors.

This change switches doxygen comment style in KWin to a more traditional
style. The main reason for doing this is to make code review process easier
for new contributors as well us.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D22812
2019-07-29 22:06:19 +03:00
Vlad Zagorodniy
8af2fa73dc Run clang-tidy with modernize-use-override check
Summary:
Currently code base of kwin can be viewed as two pieces. One is very
ancient, and the other one is more modern, which uses new C++ features.

The main problem with the ancient code is that it was written before
C++11 era. So, no override or final keywords, lambdas, etc.

Quite recently, KDE compiler settings were changed to show a warning if
a virtual method has missing override keyword. As you might have already
guessed, this fired back at us because of that ancient code. We had
about 500 new compiler warnings.

A "solution" was proposed to that problem - disable -Wno-suggest-override
and the other similar warning for clang. It's hard to call a solution
because those warnings are disabled not only for the old code, but also
for new. This is not what we want!

The main argument for not actually fixing the problem was that git
history will be screwed as well because of human factor. While good git
history is a very important thing, we should not go crazy about it and
block every change that somehow alters git history. git blame allows to
specify starting revision for a reason.

The other argument (human factor) can be easily solved by using tools
such as clang-tidy. clang-tidy is a clang-based linter for C++. It can
be used for various things, e.g. fixing coding style(e.g. add missing
braces to if statements, readability-braces-around-statements check),
or in our case add missing override keywords.

Test Plan: Compiles.

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, apol, romangg, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D22371
2019-07-22 20:03:22 +03:00
Vlad Zagorodniy
5e0e708a76 Port away from deprecated QImage::byteCount
Summary:
QImage::byteCount() was deprecated in Qt 5.10. It is advised to use
QImage::sizeInBytes() method instead.

Reviewers: #kwin, apol

Reviewed By: apol

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D22355
2019-07-10 02:02:15 +03:00
l10n daemon script
db12cb6742 SVN_SILENT made messages (.desktop file) - always resolve ours
In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"
2019-06-21 05:35:42 +02:00
Roman Gilg
1a11abc821 [platforms/x11/standalone] Port to AbstractOutput
Summary:
Represent outputs in the X11 session via AbstractOutput. For that we
move all Wayland specific parts of AbstractOutput into a new subclass
AbstractWaylandOutput and let the outputs of our Wayland backends inherit
from there.

This should allow us to get rid of the Screens class later on.

Test Plan: Manually in X session.

Reviewers: #kwin, zzag, davidedmundson

Reviewed By: #kwin, zzag, davidedmundson

Subscribers: ngraham, zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D19208
2019-06-13 11:39:25 +02:00
Roman Gilg
8040c559cb [platforms/x11/windowed] Port to AbstractOutput
Summary:
To homogenize our backends and as another step to remove the Screens class
use the AbstractOutput class in the windowed X11 backend.

Test Plan: Manually in X session.

Reviewers: #kwin, zzag

Reviewed By: #kwin, zzag

Subscribers: davidedmundson, zzag, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D19207
2019-06-13 11:27:59 +02:00
Vlad Zagorodniy
7f593a67ad Send axis_source, axis_discrete, and axis_stop
Summary:
So far KWin didn't send axis_source, axis_discrete, and axis_stop. Even
though most of those events are optional, clients need them to work as
expected. For example, one needs axis_source and axis_stop to implement
kinetic scrolling; Xwayland needs axis_discrete to prevent multiple
scroll events when the compositor sends axis deltas greater than 10, etc.

BUG: 404152
FIXED-IN: 5.17.0

Test Plan:
* Content of a webpage in Firefox is moved by one line per each mouse
  wheel "click";
* Scrolled gedit using 2 fingers on GNOME Shell, sway, and KDE Plasma;
  in all three cases wayland debug looked the same (except diagonal scroll
  motions).

Reviewers: #kwin, davidedmundson

Reviewed By: #kwin, davidedmundson

Subscribers: davidedmundson, kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D19000
2019-05-17 12:06:10 +03:00
Martin Flöser
cbbe94d769 Restrict available supported compositors based on first initialized one
Summary:
On Wayland we cannot switch from OpenGL to QPainter compositor as this
would break any running OpenGL application. KWin registers it's
EGLDisplay to Wayland and without OpenGL this doesn't make sense any
more. We are not able to render OpenGL buffers in the QPainter
compositor.

While it's theoretically possible to switch from QPainter to OpenGL it
doesn't make any sense for the same reason. Any running OpenGL
application would be using llvmpipe and could not be switched to proper
OpenGL.

This change stores the selected compositing type in Platform and the
implementations can use it to restrict the supported compositors. On X11
we don't need this, all other Platforms implement the restriction. Thus
it's no longer possible to switch the backends at runtime.

Test Plan:
Adjusted tests run, no runtime test as gui doesn't support
switching to QPainter anyway.

Reviewers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D19084
2019-02-22 16:59:08 +01:00
Martin Flöser
d49642ca15 Add touch support to x11 windowed platform
Summary:
This change inits XInput extension, listens for touch events and
forwards them to our platform API. Thus touch events are forwarded on a
nested wayland session on X11.

Please note that I only tested this change on Xwayland.

Test Plan: Run nested kwin_wayland with two outputs and looked into debug console

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D17369
2018-12-31 07:57:09 +01:00
l10n daemon script
91f5938a7f SVN_SILENT made messages (.desktop file) - always resolve ours
In case of conflict in i18n, keep the version of the branch "ours"
To resolve a particular conflict, "git checkout --ours path/to/file.desktop"
2018-12-24 05:25:01 +01:00
Martin Flöser
c8ede9a5ff Build platform plugins in correct sub directory of build dir
Summary:
This brings KWin a step closer to be run from build dir without having
to install at all. The integration tests are adjusted so that the
virtual platform is still found which makes the code be closer to what
is used in normal kwin_wayland.

Test Plan: ctest passes, manually verified correct plugin is loaded

Reviewers: #kwin

Subscribers: kwin

Tags: #kwin

Differential Revision: https://phabricator.kde.org/D17388
2018-12-13 19:36:28 +01:00