On 17.02.2008, at 15:56, Yuri D'Elia wrote: >> When I use Single Monitor mode, every thing goes well again. The draw >> procedure is fast enough to treat my eyes. >> > Your card or driver may handle the second monitor in a different way. > Ensure that the visual modes for both monitors are the same, otherwise > the driver might resort to software-only when dragging a window from > one > monitor to the other.
Yes, this is one very likely issue. You may have created a perfect rendering context on screen 1, but when you move to screen 2, the z buffer depth may not be supported or whatever else, and your driver falls back to software rendering (sloooow). ---- http://robowerk.com/ _______________________________________________ fltk-bugs mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk-bugs
