>See "Draw direct to window in OSX" example in R7 or later. > >The problem you would experience with that is that you can then only >draw into a place that's the size of the window. So if you have a >larger image, you can't use that approach easily. You'll still need >a GWorld for easy living. > >I do use the draw-into-window-backing-buffer approach for live >previews on occasion in my x app, because it doesn't matter in that >case and it seems faster. > >rc rc: Thanks for the lead -- however, the drawings I am producing are huge. The largest has been 21,720 by 6,204 pixels and takes 3305 ticks (about 55 seconds) to draw. It would be nice to see it speed up a bit. I'm reviewing your RC's PLOTLINE version that use's RP's CUSTOMSETPIXEL FN, but it's over my head -- it will take a while for me to distill it down to a simple lineto-like function. tedd -- -------------------------------------------------------------------------------- http://sperling.com/