KDE-Rounded-Corners

This effect rounds the corners of your windows and adds an outline around them without much affecting the performance of the KDE Plasma desktop (see #49 and #50).

This effect started as a fork of shapecorners with some additional contributions in Alex47's project, then I optimized and reimplemented the effect with shaders with influences from the invert effect.

Tested on:

Contributions:

• Compatibility of the effect with other effects like Wobbly windows
• Compatibility with KWin for Plasma versions 5.27 to 6.0
• Optimize the effect to render once instead of 5 times - see #49
• Reimplementation with shaders to include shadows at corners and an outline
• Disable effect when windows get maximized
• Cleanups for the plugin logic, remove unneeded dependencies from CMakeLists.txt file - by alex1701c
• Separate outline color for active and inactive windows - by OrkenWhite
• Add natural shadows using parametric blend - by paletteOvO

How to build from source code:

You need to install development packages for your distribution first:

sudo pacman -S git cmake extra-cmake-modules base-devel
yay -S qt5-tools

sudo pamac build kwin-effect-rounded-corners-git

sudo zypper install git cmake gcc-c++ extra-cmake-modules libqt5-qttools-devel kconfigwidgets-devel kwindowsystem-devel kguiaddons-devel ki18n-devel knotifications-devel kwin5-devel libQt5Gui-devel libQt5OpenGL-devel libepoxy-devel libqt5-qtnetworkauth-devel

xbps-install git cmake make qt5-tools-devel extra-cmake-modules gettext-devel kwin-devel

nix-env -iA nixos.kde-rounded-corners

Then clone the source code and compile it:

git clone https://github.com/matinlotfali/KDE-Rounded-Corners
cd KDE-Rounded-Corners
mkdir build
cd build
cmake .. --install-prefix /usr
make
sudo make install

Load & Unload

To activate the effect, you can now log out and log back in, or run the command below inside the build directory:

sh ../tools/load.sh

To fully uninstall the effect, run the following commands inside the build directory:

sh ../tools/unload.sh
sudo make uninstall

Auto install after KWin update

After each kwin package update, the effect becomes incompatible. So it won't load without a rebuild.

As long as the effect is not part of the kwin yet (being discussed here), you can automate the re-installation by running the command below inside the build directory:

sh ../tools/autorun-test-install.sh

The command above adds a desktop file inside the autorun directory which checks if the effect is still supported, if it is not supported, it would automatically rebuild and reinstall the effect.

Settings

You can change the corner radius, or disable the effect in:

[ System Settings ] --> [ Workspace Behavior ] --> [ Desktop Effects ] --> [ ShapeCorners ]

Tips

Add shadow to windows without decoration (like Steam)

You can add shadows for specific windows using the hack below. I don't know how to enforce it in my code.

1. In [ System settings ] -> [ Window management ] -> [ Window rules ] -> [ Appearance & Fixes ]:

   Add [steam] and set [ No titlebar ] and frame to [ No ]

2. In [ System settings ] -> [ Application Style ] -> [ Window decoration ] -> [ Breeze theme setting ] -> [ Window specific overrides ]:

   Add [steam] and set [ Hide Window title bar ] to [ Yes ].

After that, the Steam window gets its shadows back.