Mark Vojkovich wrote: > > On Tue, 12 Nov 2002, David Balazic wrote: > > > Hi! > > > > I've been toying with this idea to use the video overlay feature > > as an efficient anti alias method. Is this doable ? > > > > Here is how it would work : > > > > set the display to some resolution ( higher is better ) > > render your picture ( at a lower , same or higher resolution than the > > display ) > > use the overlay to scale the picture to the physical screen > > > > cards with good scaling ( filtering etc. ) would make a nice > > smoothed picture , right ? > > Blurrying pictures is not antialiasing them. Antialiasing > is subpixel rendering implemented by calculating partial-pixel > coverage and mixing the partial-pixel coverages to get an > unaliased pixel. Video overlays don't do this.
Video overlays perform some filtering , right ? antialias is usualy = supersampling + low-pass filtering. supersampling : use higher resolution low-pass : use overlay hardware Am I missing something ? I admit I don't know how usually overlay filtering/resizing works. _______________________________________________ Xpert mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/xpert
