On Sun, Sep 07, 2008 at 04:13:18PM +0200, Tomas Carnecky wrote: > Peter Hutterer wrote: > > On Sat, Sep 06, 2008 at 05:15:51PM -0700, Keith Packard wrote: > >> On Sat, 2008-09-06 at 17:23 +0300, Daniel Stone wrote: > >> > >>> Isn't this just PropModeReplace with nItems = 0? > >> Is there a difference between a property of length zero and an absent > >> property? > > > > nItems = 0 remove the content, but not the property itself, hence the need > > for > > DeleteProperty. This is also the behaviour core has with window properties. > > What is the difference between a property with no content and no > property? In which situations would this distinction be useful?
An empty property indicates that e.g. the driver knows about this property, but no data is available (or can be exported). Cheers, Peter _______________________________________________ xorg mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/xorg
