From:	boylesgj AT lion DOT cs DOT latrobe DOT edu DOT au (Gregary J Boyles)
Newsgroups:	comp.os.msdos.djgpp
Subject:	GRX context problem.
Date:	26 Apr 1997 16:22:49 GMT
Organization:	Comp.Sci & Comp.Eng, La Trobe Uni, Australia
Lines:	20
Distribution:	world
Message-ID:	<5jta4p$gce@lion.cs.latrobe.edu.au>
NNTP-Posting-Host:	lion.cs.latrobe.edu.au
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

Can some body please explain to me why the #$%^ this program fails to put
anything on the screen. I am so god damned frustrated with this!
If I comment out the marked lines it works fine. But what the hell is the
use of memory contexts if you can never see them?????

#include <pc.h>
#include <grx20.h>
#include <iostream.h>

void main()
{
  GrSetDriver("VESA");
  GrSetMode(GR_width_height_color_graphics,1024,768,256);
  long color=GrAllocColor(200,240,34);
  GrContext *Context=GrCreateContext(1024,768,NULL,NULL);
*  GrSetContext(Context);
  GrFilledCircle(500,300,500,color);
*  GrBitBlt(NULL,100,100,Context,100,100,200,200,GrWRITE);
  cin.get();
}

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