From:	marg AT okstate DOT edu (Carl Marg)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Allegro problem
Date:	Wed, 03 Mar 1999 19:48:10 GMT
Organization:	Oklahoma State University
Lines:	31
Message-ID:	<36dd9087.274233@news.okstate.edu>
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

I'm writing a fairly simple program for a school assignment.
All I have to do is implement a few simple graphics algorithms,
bresh. line drawing, ellipse, polygon, and a boundary fill.
I have all the other things working fine, but this function
seems to cause major problem.
The funny thing is it will seem to work right for a fraction of a
second, but a bit into the fill, it will crash.  Sometimes my computer
spontaneously reboots, sometimes I'll get a hard lock, or a GPF.
So, can anyone tell me why this code does this?
BTW, if I comment out 2 of the calls to boundfill in boundfill,
it will fill a quarter of the area without a problem...

void boundfill(int x, int y, int fill, int bound)
{
   int cur;
   cur=getpixel(screen,x,y);
   if ((cur!=bound) && (cur!=fill))
   {
      putpixel(screen,x,y,fill);
      boundfill(x+1,y,fill,bound);
      boundfill(x-1,y,fill,bound);
      boundfill(x,y+1,fill,bound);
      boundfill(x,y-1,fill,bound);
   } //if
}


this is really bugging me,
I'd appreciate any suggestions,

Carl

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