403a04fe24
Xcursors don't support hidpi so if a hidpi cursor is needed, kwin will scale the desired size by the scale factor and ask Xcursor helpers to load a theme with the given name and the size. However, the theme loading code doesn't take into account that Xcursor theme loading helpers may not return cursor sprites of size size * scale if the theme has no such a size. For example, if the cursor theme only provides 24, 36, and 48 sizes and kwin attempts to load cursors of size 48 with a scale factor of 2, we will get cursors of size 48 instead of 96. Unfortunately, this will result in the issue where the cursor shrinks when hovering decorations because kwin doesn't know that the effective scale factor (1) is different from the requested scale factor (2). In order to fix loading of HiDPI cursors, we need to approximate the effective scale factor of every cursor sprite as we load it. |
3 years ago | |
|---|---|---|
| LICENSES | 4 years ago | |
| autotests | 3 years ago | |
| cmake/modules | ||
| data | ||
| doc | ||
| kconf_update | ||
| src | 3 years ago | |
| tests | 4 years ago | |
| .gitignore | ||
| CMakeLists.txt | ||
| HACKING.md | ||
| KWinDBusInterfaceConfig.cmake.in | ||
| Mainpage.dox | ||
| README.md | ||
| TESTING.md | ||
| logo.png | ||
| plasma-kwin_wayland.service.in | ||
| plasma-kwin_x11.service.in | ||
README.md
KWin
KWin is an easy to use, but flexible, composited Window Manager for Xorg windowing systems (Wayland, X11) on Linux. Its primary usage is in conjunction with a Desktop Shell (e.g. KDE Plasma Desktop). KWin is designed to go out of the way; users should not notice that they use a window manager at all. Nevertheless KWin provides a steep learning curve for advanced features, which are available, if they do not conflict with the primary mission. KWin does not have a dedicated targeted user group, but follows the targeted user group of the Desktop Shell using KWin as it's window manager.
KWin is not...
- a standalone window manager (c.f. openbox, i3) and does not provide any functionality belonging to a Desktop Shell.
- a replacement for window managers designed for use with a specific Desktop Shell (e.g. GNOME Shell)
- a minimalistic window manager
- designed for use without compositing or for X11 network transparency, though both are possible.
Contacting KWin development team
- mailing list: kwin@kde.org
- IRC: #kwin on freenode
Support
Application Developer
If you are an application developer having questions regarding windowing systems (either X11 or Wayland) please do not hesitate to contact us. Preferable through our mailing list. Ideally subscribe to the mailing list, so that your mail doesn't get stuck in the moderation queue.
End user
Please contact the support channels of your Linux distribution for user support. The KWin development team does not provide end user support.
Reporting bugs
Please use KDE's bugtracker and report for product KWin.
Developing on KWin
Please refer to hacking documentation for how to build and start KWin. Further information about KWin's test suite can be found in TESTING.md.
Guidelines for new features
A new Feature can only be added to KWin if:
- it does not violate the primary missions as stated at the start of this document
- it does not introduce instabilities
- it is maintained, that is bugs are fixed in a timely manner (second next minor release) if it is not a corner case.
- it works together with all existing features
- it supports both single and multi screen (xrandr)
- it adds a significant advantage
- it is feature complete, that is supports at least all useful features from competitive implementations
- it is not a special case for a small user group
- it does not increase code complexity significantly
- it does not affect KWin's license (GPLv2+)
All new added features are under probation, that is if any of the non-functional requirements as listed above do not hold true in the next two feature releases, the added feature will be removed again.
The same non functional requirements hold true for any kind of plugins (effects, scripts, etc.). It is suggested to use scripted plugins and distribute them separately.