Xref: news2.mv.net comp.os.msdos.djgpp:2584
From: cotool1 AT umbc DOT edu (o'toole casey)
Newsgroups: comp.os.msdos.djgpp
Subject: GRX20 Speed
Date: 10 Apr 1996 00:12:55 -0400
Organization: University of Maryland, Baltimore County
Lines: 21
Message-ID: <4kfcg7$2bh@umbc9.umbc.edu>
NNTP-Posting-Host: umbc9.umbc.edu
NNTP-Posting-User: cotool1
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Does anyone have any comments on the Speed of the GRX 2.0 Library?

I am very Impressed with it except that I was wandering why my
3d program was running at about 16 FPS.  So I commented out all of the
transform and draw functions and only left the ClearContext and
GrBitBltNC functions.  I was STARTLED to see that I could only achieve
around 40 FPS just clearing a memory context then writing it to the
screen in 320 x 200 x 256 mode.  A similiar program written in 
Borland C 4.5 REAL mode accomplishes 160+ FPS.  

Now, I imagine in order to accomplishe the speed Im looking for that
Im going to have to switch back to real mode and write my own
bitblt functions.. I read about this in the DJ-TUT file somewhre..

anyone have any comments on this? 
Am I correct in assuming that  GRX will not be able to do
160 FPS on its own?

Casey O'Toole
cotool1 AT gl DOT umbc DOT edu