Opaque window corners when using compiz

[Ralf Ebert]

When taking screenshots of windows on Ubuntu 10.10 (visual effects activated/compiz, Radiance theme activated) the corners of windows are opaque and not transparent.

[Mario Kemper (Romario) (mario-kemper)]

Generating transparent corners is not possible when using compiz. If you are using compiz please try to switch to an alternative window manager, e.g. metacity (disable desktop effects).

It's a technical limitation. Metacity uses the XSHAPE extension ( http://en.wikipedia.org/wiki/Shape_extension ) to create non-rectangular windows and compiz uses compositing. It's easy to determine the shape in the first case but impossible to do
this when compositing is used.

All screenshot taking apps (gnome-screenshot, ksnapshot etc.) behave in the same way here. I am sorry for the inconvenience.

[Ralf Ebert (info-ralfebert-deactivatedaccount)]

Could there be a plug-in that just 'rounds' the image by making the pixels transparent that could be activated by default?
Having to switch the window manager just to take screenshots is a big annoyance.

[Mario Kemper (Romario) (mario-kemper)]

Looking for a workaround now...

[Mario Kemper (Romario) (mario-kemper)]

There is a new option: "Force rounded window corners". The parameters can be changed via config file. Have a look at the option's tooltip for further instructions.