Effects are given the interval between two consecutive frames. The main
flaw of this approach is that if the Compositor transitions from the idle
state to "active" state, i.e. when there is something to repaint,
effects may see a very large interval between the last painted frame and
the current. In order to address this issue, the Scene invalidates the
timer that is used to measure time between consecutive frames before the
Compositor is about to become idle.
While this works perfectly fine with Xinerama-style rendering, with per
screen rendering, determining whether the compositor is about to idle is
rather a tedious task mostly because a single output can't be used for
the test.
Furthermore, since the Compositor schedules pointless repaints just to
ensure that it's idle, it might take several attempts to figure out
whether the scene timer must be invalidated if you use (true) per screen
rendering.
Ideally, all effects should use a timeline helper that is aware of the
underlying render loop and its timings. However, this option is off the
table because it will involve a lot of work to implement it.
Alternative and much simpler option is to pass the expected presentation
time to effects rather than time between consecutive frames. This means
that effects are responsible for determining how much animation timelines
have to be advanced. Typically, an effect would have to store the
presentation timestamp provided in either prePaint{Screen,Window} and
use it in the subsequent prePaint{Screen,Window} call to estimate the
amount of time passed between the next and the last frames.
Unfortunately, this is an API incompatible change. However, it shouldn't
take a lot of work to port third-party binary effects, which don't use the
AnimationEffect class, to the new API. On the bright side, we no longer
need to be concerned about the Compositor getting idle.
We do still try to determine whether the Compositor is about to idle,
primarily, because the OpenGL render backend swaps buffers on present,
but that will change with the ongoing compositing timing rework.
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.
The text caret tracking feature allows to keep the text caret inside the
zoomed area. It can be especially useful when the zoomed area is smaller
than the text editor.
BUG: 362189
Currently, the focus tracking functionality in the zoom effect does not
work because it relies on kaccessibleapp, which is dead. Luckily for us,
there is a library called libqaccessibilityclient that provides a way
to monitor focus changes.
BUG: 421234
Summary:
We build some objects several times which makes it uncomfortable to develop KWin
since every time we modify something a lot of things get rebuilt. This should
help a bit although it doesn't solve all the problems.
Test Plan: Builds, tests pass
Reviewers: #kwin, zzag
Reviewed By: #kwin, zzag
Subscribers: davidedmundson, zzag, anthonyfieroni, iasensio, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D28445
Summary:
Won't make things go much faster since everything that was
being passed by value is refcounted but still const & is a bit faster
than refcounting
For shared pointers instead of adding const & we move them into the
destination variable saving some cpu usage but at the same time making
clear the pointer is being stored by not being const &
Reviewers: zzag
Reviewed By: zzag
Subscribers: zzag, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D25022
Summary:
Because KWin is a very old project, we use three kinds of null pointer
literals: 0, NULL, and nullptr. Since C++11, it's recommended to use
nullptr keyword.
This change converts all usages of 0 and NULL literal to nullptr. Even
though it breaks git history, we need to do it in order to have consistent
code as well to ease code reviews (it's very tempting for some people to
add unrelated changes to their patches, e.g. converting NULL to nullptr).
Test Plan: Compiles.
Reviewers: #kwin, davidedmundson, romangg
Reviewed By: #kwin, davidedmundson, romangg
Subscribers: romangg, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D23618
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
Summary:
The new connect syntax has several advantages over the old syntax:
(a) Connecting with the new syntax is faster;
(b) It is compile time checked.
There are still a few places where the old connect syntax is used, e.g.
connecting to QML buttons in the Desktop Grid effect.
Test Plan:
Have been testing this patch for ~2 weeks, haven't noticed any
regressions.
Reviewers: #kwin, davidedmundson
Reviewed By: #kwin, davidedmundson
Subscribers: davidedmundson, broulik, graesslin, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D18368
Summary:
With the Oxygen cursor theme, a visual glitch can appear in the
bottom-left corner of the cursor when the screen is zoomed in.
The reason for that is we're using GL_REPEAT for GL_TEXTURE_WRAP_S
and GL_TEXTURE_WRAP_T. So, when the linear filter samples neighboring
texels in the bottom, it can sample some texels from the top (because of
GL_REPEAT).
To fix that, we have to set the wrap mode to GL_CLAMP_TO_EDGE.
BUG: 338254
FIXED-IN: 5.14.0
Test Plan:
Before:
{F6303912}
After:
{F6303913}
Tried other cursor themes(Breeze and Adwaita), everything looks okay.
Reviewers: #kwin, davidedmundson
Reviewed By: #kwin, davidedmundson
Subscribers: davidedmundson, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D15949
Summary: This is a follow-up for D11377, as requested by @graesslin. The patch removes the default shortcuts for the {nav Move zoomed area} actions.
Test Plan:
Deployed KWin with patch, killed and restarted KWin, created and logged into new user account, then zoomed in:
- {key Meta Ctrl Arrows} do not move the zoomed view
- The actions are still visible (without shortcuts) in {nav System Settings > Shortcuts > Global Shortcuts > KWin}
- You can still set custom shortcuts for the actions, and they work
Reviewers: #kwin, graesslin
Reviewed By: #kwin, graesslin
Subscribers: graesslin, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D11526
Summary:
KWin's window management powers are not as discoverable as they could be--particularly tiling, which by default has no visible UI and no keyboard shortcuts. Resolving this issue is highly relevant to {T6831}.
This patch re-assigns the {key Meta arrowkeys} shortcuts that are currently used for `move zoomed area` (which are pretty esoteric, infrequently-used actions), adding {key ctrl} to their shortcuts. This allows us to use their valuable {key Meta arrowkeys} for more useful and commonly-used window management actions:
- {key Meta Left}: quick tile window to the left
- {key Meta Right}: quick tile window to the right
- {key Meta Up}: quick-tile window to the top
- {key Meta Down}: quick-tile the window to the bottom
The patch also sets some default shortctuts for minimize and maximize:
- {key Meta PageDown}: minimize window
- {key Meta PageUp}: maximize/de-maximize the window
Test Plan:
Do a clean build
`make test` (no new test failures)
Reboot
Create and log into a new user account
- {key meta up} tiles the active window to the top
- {key meta down} tiles the active window to the bottom
- {key meta left} tiles the active window to the left
- {key meta right} tiles the active window to the right
- {key meta PageDown} minimizes the active window
- {key meta PageUp} maximizes and de-maximizes the active window
- {key meta ctrl up} moves the zoomed area up
- {key meta ctrl down} moves the zoomed area down
- {key meta ctrl left} moves the zoomed area to the left
- {key meta ctrl right} moves the zoomed area to the right
Reviewers: #kwin, #plasma, romangg
Reviewed By: #kwin, #plasma, romangg
Subscribers: mart, romangg, broulik, jnoack, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D11377
Summary:
By changing all kcfg to have arg="true" we can pass in the same
KSharedConfigPtr into all effects. This allows to have fake config in
the tests and in the planned effect demo mode.
Also it means that we don't have to hardcode the name kwinrc into the
files. In the configs - where we cannot access the effectshandler - we
use the define KWIN_CONFIG which gets generated based on the compile
time arguments.
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D3571
Summary:
We have the kcfg generated settings object, so no need to manually write
the config save code for zoom and magnifier effect.
Reviewers: #kwin, #plasma
Subscribers: plasma-devel, kwin
Tags: #kwin
Differential Revision: https://phabricator.kde.org/D3338
Summary:
The implementation delegates to the Platform to perform the actual
show/hide of the cursor image.
This replaces the implementation in the zoom effect which so far
directly interacted with xfixes to show/hide the cursor. This is now
provided by the x11/standalone platform. And due to this change the zoom
effect can now properly hide the cursor on platform DRM (wayland) as
well.
Test Plan: Zoom effect on Wayland hides the cursor
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3120
Summary:
There are several effects (screenshot, zoom) which need access to the
cursor image and cursor hotspot. So far these effects used X11
unconditionally to get the cursor which obviously does not work on
Wayland.
This change adds a new class PlatformCursorImage to kwinglobals which
wraps what a cursor is (image and hotspot) and adds a new virtual method
to Platform to provide such a PlatformCursorImage. By default it's the
cursor image the Platform tracks. On X11/standalone platform this new
virtual method is overriden and provides a PlatformCursorImage from X11
using the code previously used in screenshot effect.
Screenshot effect and zoom are adjusted to use the new API instead of
X11.
Test Plan:
Zoom effect tested on Wayland, now gets the proper cursor icon.
X11 functionality not yet tested.
Reviewers: #kwin, #plasma_on_wayland
Subscribers: plasma-devel, kwin
Tags: #plasma_on_wayland, #kwin
Differential Revision: https://phabricator.kde.org/D3093
Without the componentDisplayName the shortcut dialog takes the name of
the application e.g. Systemsettings or "KDE Control Module", but we want
it to be KWin.
REVIEW: 124706
