> > > You can render to a pixmap and then copy the contents of the > > > pixmap to the window with XCopyArea(). ... > > It works, but there is a big big loss of performence ! > > > > Without double buffer the frame rate can be for a test example > > 380 frames per seconds, > > but with double-buffer it slows a lot down to > > 30 frames / seconds. > > That sounds like the pixmap didn't get put in videoram, which > is unfortunate. It probably would have been fast if the pixmap > was in videoram. Does this card have very much videoram? My video card is a nVidia GeForce4 Ti 4200 with AGP8X > If you VT switch to the console and then back to X (to clear out > the existing videoram pixmaps) before starting your app does it > run significantly faster? Not at all. It is still very slow in the same way. I don't know if it could help, but here are the outputs of xvinfo and xdpyinfo http://north.chez-alice.fr/X/xvinfo http://north.chez-alice.fr/X/xdpyinfo -- _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
