On 02.06.2011 20:55, David Chisnall wrote:
On 2 Jun 2011, at 19:44, Austin Clow wrote:
Are transparent windows supported in WindowMaker?
Wrong question. WindowMaker is a window manager, it has nothing to do with
whether transparent windows work, it just controls their positioning and their
decorations.
Transparent windows are supported in X11 by a combination of the composite and
render extensions. Applications draw RGBA windows, which are directed off
screen. A compositing manager then draws them onto the display. GNUstep will
draw RGBA windows (with the Cairo back end definitely, I think with libart, and
I think not with xlib), but for these to be transparent / translucent you must
be running a compositing manager. X.org comes with a simple compositing
manager, xcompmgr, which should work (it can also draw shadows, but little
else). Alternatively, you can run a more complex one, like Compiz, which adds
other effects.
You may have to set the alpha value of the window as well. But I haven't
tested that feature recently. When we added support to RGBA windows in
the cairo backend this was needed.
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