> On 03/20/12 02:29, MacArthur, Ian (SELEX GALILEO, UK) wrote: > > That said, ISTR that it really only ever worked on the old > > SGI machines, which *nobody* has anymore (except maybe the > > one Greg uses as a fan-heater from time to time...) > > > > Or I may be wrong... > > No, I think you're right, nobody has SGI's anymore. ;D > > Looking at configure, though I find it hard to understand, > it seems to grep the output of 'xprop -root' for the string > SERVER_OVERLAY_VISUALS to determine if overlays are supported. > > I just looked at my recent linux build of 1.3.x, and HAVE_OVERLAY > was detected as 'off', and indeed there's no overlay strings in my > machine's xprop output. > > Here's the HAVE_OVERLAY section from my linux/fltk1.3.x config.h > indicating the possibly SGI-specific aspect of this flag: > > /* > * HAVE_OVERLAY: > * > * Use the X overlay extension? FLTK will try to use an overlay > * visual for Fl_Overlay_Window, the Gl_Window overlay, and for the > * menus. Setting this to zero will remove a substantial amount of > * code from FLTK. Overlays have only been tested on SGI servers! > */ > > #define HAVE_OVERLAY 0 >
Dear Ian & Greg, Many thanks for your reply. So does this mean I need to integrate the hardware overlay support in X11, they FLTK can detect the X server support hardware support, then make the HAVE_OVERLAY equal to 1 after configure? Does this only valid for FLTK1.3, but not FLTK2.0? Because I see the following in FLTK2.0's config.h /* Did we detect the X overlay extension on the X server? This is currently not used anywhere. */ #define HAVE_OVERLAY 0 Best regards, Leo _______________________________________________ fltk mailing list fltk@easysw.com http://lists.easysw.com/mailman/listinfo/fltk
