It doesn't seem possible to cut flicker completely, since the Dragonball chip is missing a vertical retrace interrupt; so an application can never know which horizontal line of the display is currently being refreshed. The function seems to be completely missing from the API even for new hardware which might support this video feature or double buffering in hardware.
You can reduce the flicker down to just 2 frame tearing by copying to the entire display in one pass. Just set the draw window to an offscreen one until you are completely done updating one frame, then copy that entire frame to onscreen memory in one blit (ideally, just before vertical retrace to remove any tearing). Ron Nicholson HotPaw <http://www.hotpaw.com/rhn/hotpaw > -- For information on using the Palm Developer Forums, or to unsubscribe, please see http://www.palmos.com/dev/support/forums/
