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:

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Contributions:

• Compatibility of the effect with other effects like Wobbly windows - by matinlotfali
• Optimize the effect to render once instead of 5 times - by matinlotfali - see #49
• Reimplementation with shaders to include shadows at corners and an outline - by matinlotfali
• Compatibility with KWin from versions 5.23 to 5.27 - by matinlotfali
• Disable effect when window gets maximized - by matinlotfali
• Cleanups for the plugin logic, remove unneeded dependencies from CMakeLists.txt file - by alex1701c
• Separate outline color for active and inactive windows - by OrkenWhite

How to build from source code:

You need to install development packages for your distribution first:

• Debian based (Ubuntu, Kubuntu, KDE Neon) - by alex47:

  sudo apt install git cmake g++ gettext extra-cmake-modules qttools5-dev libqt5x11extras5-dev libkf5configwidgets-dev libkf5globalaccel-dev libkf5notifications-dev kwin-dev 
  

• Fedora - by matinlotfali

  sudo dnf install git cmake gcc-c++ extra-cmake-modules qt5-qttools-devel qt5-qttools-static qt5-qtx11extras-devel kf5-kconfigwidgets-devel kf5-kcrash-devel kf5-kguiaddons-devel kf5-kglobalaccel-devel kf5-kio-devel kf5-ki18n-devel kwin-devel qt5-qtbase-devel libepoxy-devel
  

• Arch - by hexa-one

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

  or AUR package by xiota

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

• OpenSUSE - by mathiasgredal and Richardsause

  sudo zypper install git cmake gcc-c++ extra-cmake-modules libqt5-qttools-devel libqt5-qtx11extras-devel kconfigwidgets-devel kguiaddons-devel kglobalaccel-devel ki18n-devel knotifications-devel kwin5-devel libQt5Gui-devel libQt5OpenGL-devel libepoxy-devel kwindowsystem-devel libqt5-qtnetworkauth-devel
  

• Void - by lay-by

  xbps-install git cmake make qt5-tools-devel extra-cmake-modules qt5-x11extras-devel gettext-devel kwin-devel
  

• NixOS - by Pavel Zolotarevskiy

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

Then get the source code and compile:

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

You can now logout and log back in or run the command below to have it activated.

kwin --replace &

Settings

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

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

To fully uninstall, simply run the command sudo make uninstall inside build directory