> > > You can render to a pixmap and then copy the contents of the > > > pixmap to the window with XCopyArea(). This will be similar to > > > many implementations of glXSwapBuffers, however, many GL implementation > > > allow synchronization with the refresh rate, while Xlib offers no > > > such feature. Note that glXSwapBuffers executes an implicit > > > glFlush, while XCopyArea does not execute an implicit XFlush. > > > > Thanks a lot! > > > > 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 Sorry, I'm not sure to understand, What is VT ? > (to clear out the existing videoram pixmaps) before starting your app does > it run significantly faster? -- _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
