Date:	Fri, 25 Jun 93 09:04:41 EDT
From:	DJ Delorie <dj AT ctron DOT com>
To:	keane AT earthsun DOT umd DOT edu
Cc:	djgpp AT sun DOT soe DOT clarkson DOT edu
Subject:	Re: Direct Graphics Memory Writing

One thing to note about the graphics drivers - they work best when you
don't cross "window banding" boundaries.  Since these boundaries run
across (not up/down), program any scanning routines to work a row at a
time.  This reduces the overhead of reprogramming the SVGA card each
time you move into a different frame.

Note that the bitting option will be faster if your plotting algorithm
crosses many of these boundaries, since Blt is optimized for the
drivers.

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