ShapeCorners

KDE effect rounds/chisels corners of your windows.

Fork of https://github.com/khanhas/ShapeCorners which is a fork of https://sourceforge.net/projects/shapecorners/.

This fork adds the SquareOnFullscreen-Option with a whooping 10 lines of code. Also it is now possible to darken the cut out part of a window corner by a certain amount. This will make the round corners almost indistinguishable from window shadows (you can still see it when you look reaaallly closely).

Features:

• Customizable via config file
• Different types of corner: Rounded and Chiseled
• Each corner can have different radius
• Ability to square corner when windows edge is at screen edge.
• Ability to define Whitelist and Blacklist to exclude/force applying ShapeCorners

Dependencies

• Distro Debian based (Ubuntu, Kubuntu):

sudo apt install git cmake g++ gettext extra-cmake-modules qttools5-dev libqt5x11extras5-dev libkf5configwidgets-dev libkf5crash-dev libkf5globalaccel-dev libkf5kio-dev libkf5notifications-dev kinit-dev kwin-dev 

Build

git clone https://github.com/khanhas/ShapeCorners
cd ShapeCorners
mkdir build; cd build
cmake ../ -DCMAKE_INSTALL_PREFIX=/usr -DQT5BUILD=ON
make && sudo make install
kwin_x11 --replace &

It should be now activated.

Config

• Create file shapecornersrc in ~/.config
• Follow this template:

[General]
Radius=10
CornerShadowTransparency=0.0,0.0,0.2,0.2
Type=Rounded
SquareAtScreenEdge=false
SquareOnFullscreen=false
FilterShadow=false
Whitelist=
Blacklist=

• Radius: Define all corners' or specific corner's radius. Accept 1 to 4 numbers, separate by ,. E.g.:
  • Radius=20: All corners have 20 radius
  • Radius=10,20: Top Left and Bottom Right has 10; Top Right and Bottom Left has 20
  • Radius=30,40,50: Top Left has 30; Top Right and Bottom Left has 40; Bottom Right has 50
  • Radius=20,50,30,10: Top Left has 20; Top Right has 50; Bottom Right has 30; Bottom Left has 10
• CornerShadowTransparency': Sets fake shadow transparency of the corners in the same order as Radius`. Values not set default to 0.0 (no darkening)
• Type: Rounded or Chiseled
• SquareAtScreenEdge: Square off corner at when window edge is at screen edge. Boolean true or false.
• SquareOnFullscreen: Square off all corners when application is running in fullscreen. Boolean true or false
• FilterShadow: Since there is no way to change corners of shadow layer, you might want to remove shadow layer out. Boolean true or false.
• Whitelist: List of window class names that will be forced to apply ShapeCorners. Separate them by ,. E.g.:
  • Whitelist=conky
  • Whitelist=plasma,conky
• Blacklist: List of window class names that will be excluded from applying ShapeCorners. Separate them by ,. E.g.:
  • Blacklist=krunner
  • Blacklist=krunner,display

After changing config, run:

kwin_x11 --replace &