Date: Wed 14 Oct 92 18:00:45
From: ronis AT ronis DOT chem DOT mcgill DOT ca (David M. Ronis)
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: libgrx, mouse, and text-modes

I've been having some trouble with the ati drivers which come with
djgpp.  In short, I can't get into SVGA modes.  I've posted the
problem before and the author of the driver has reproduced the
problem.

In any event, the problem goes away if I use the libgrx routines and
the ativga.grn driver.  Everything works fine with one exception;
i.e., I can't seem to fully use the mouse in text mode.  The relevant
code fragment (in GR_text_mode) is:

{
 	MouseEvent event;
	MouseGetEvent(M_BUTTON_DOWN|M_POLL|M_MOTION|M_NOPAINT,&event);

}

which allows me to see if the mouse buttons are pressed, or if the
mouse is moved, without a mouse being drawn.  If the mouse is moved,
I use the event.x and event.y entries.  

With the original libgr and ati.grd driver, things work as I expected
(although I can't seem to adjust the mouse speed properly).  With the
libgrx routines, the mouse buttons work, but I don't detect any mouse
motion.  In graphics modes, I do similar things, and everything works
as expected (in all graphics modes).

In addition, I get an invalid driver error if I use the mouse in
GR_text_mode without first doing an explicit GR_set_mode.  What am I
doing wrong?

David Ronis