SGI X servers don't provide the save-unders server option, thus
whenever a Fvwm menu is drawn, the contents of the display under it is
lost and must be redrawn. It can take a lot of time, e.g. if it's a
large 3-D scene.
SGI servers provide an alternative to it called Overlays, which
consists of a completely different visual with a small screen depth
(usually 2 bits), which is drawn over everything else, and it would be
great if fvwm could use this feature whenever it's available. The only
problem is that since Overlay planes have a small colormap (3 colors +
transparent color), we will have to reduce the color usage for menus
(black + white + menubackground) and use pixmap for shaded borders
instead. GLUT (
http://www.sgi.com/Technology/openGL/glut.html) uses
Overlays for its menus whenever it's available.
Is anybody else interested in this extension of fvwm?
--
* http://www.inria.fr/robotvis/personnel/devernay/ *
* mailto:Frederic.Devernay_at_sophia.inria.fr *
* Projet ROBOTVIS -- INRIA Sophia Antipolis -- FRANCE *
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Received on Tue Nov 21 1995 - 08:43:20 GMT