Mail Archives: djgpp/1997/04/26/17:58:06
From: | boylesgj AT lion DOT cs DOT latrobe DOT edu DOT au (Gregary J Boyles)
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Newsgroups: | comp.os.msdos.djgpp
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Subject: | GRX context problem.
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Date: | 26 Apr 1997 16:22:49 GMT
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Organization: | Comp.Sci & Comp.Eng, La Trobe Uni, Australia
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Lines: | 20
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Distribution: | world
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Message-ID: | <5jta4p$gce@lion.cs.latrobe.edu.au>
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NNTP-Posting-Host: | lion.cs.latrobe.edu.au
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To: | djgpp AT delorie DOT com
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DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
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Can some body please explain to me why the #$%^ 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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