On Thu, 23 Mar 2006, Florent Monnier wrote: > > > > 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 ? Switch to a different Virtual Terminal. Ctrl-Alt-F2 and then back to the server again (usually Ctrl-Alt-F7, or whichever /var/log/XFree86.0.log file says it's using. Eg.: (--) using VT number 7 ) Mark. > > > (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 > _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
