On Wed, 2006-10-04 at 07:54 -0300, Gustavo Noronha Silva wrote: > > Now that compiz and AIGLX are working in unstable I'm quite interested > in knowing how I'd go about using the visual goodnes in my own > applications. > > I have this application which darkens the background by using the same > trick GNOME used to use for the logout dialog. > > I figured the best place for me to ask for guidance would be the X > Strike Force, so here I am asking: do you have any pointers to a library > for doing this kind of thing with compiz/aiglx help, and its > documentation?
Neither AIGLX nor compiz expose any special API to apps. To do what you describe, you could either use the RENDER extension to blend over an existing window or a dedicated translucent window, either via _NET_WM_WINDOW_OPACITY or an ARGB visual and per-pixel alpha values. For the latter two cases you should check that a compositing manager is running via _NET_WM_CM_S<screen number>. Hope these pointers will be useful, -- Earthling Michel Dänzer | http://tungstengraphics.com Libre software enthusiast | Debian, X and DRI developer
