On Tue, Nov 01, 2005 at 02:41:50PM +0100, Claudio Ciccani wrote: > Ville Syrjälä wrote: > >The radeon overlay code is a bit of mess. I started hacking on it at one > >point but then I couldn't get RGB output working and left it be. The r200 > >code looks somewhat better. I wonder if I should try to get the r200 > >driver running on my M6 instead. The r200 driver isn't perfect either > >bacause it's still ignoring some of the nice hardware features like the > >4-tap filter, pixel accurate panning etc. > > > > Unfortunately I've never got the 4-tap filter to work on my 9200SE. > Apparatenlty 4-tap registers belong only to R100 series.
You mean the custom coefficient registers? I thought 4-tap works with the hardcoded coefficients That's the impression I got from r128 specs and it seemed to work on my M6. According to the r128 specs the hardcoded coefficients are ok for upscaling and slight downscaling. For bigger downscaling the programmable coefficients should be used. Unfortunately the specs didn't provide any examples how to calculate the them so I didn't bother playing with them. Then there's also the MAX_LN_IN_PER_LN_OU settings which are currently programmed to 1. I think those only affect downscaling quality though. In any case just setting step_by to 0 should enable the 4-tap filter. -- Ville Syrjälä [EMAIL PROTECTED] http://www.sci.fi/~syrjala/ _______________________________________________ directfb-dev mailing list [email protected] http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-dev
