yes, post that code. i fear you have some funky stuff going on inside that
routine.

hi all

here is the code.
it is not so pretty.
but really its nothing more then:
put many rects into region.
get rects array from region -> crash
u can try it yourselves.

assaf

********************* my code ****************************

// background thread proc
private void ProcessBuffersThreadProc()
{
   while(true)
   {
       try
       {
               this.ProcessBuffers();
       }
       catch(StackOverflowException ex)
       {
           WinForms.MessageBox.Show(ex.Message, this.ToString());
       }
   }
}

private void ProcessBuffers()
{
   Region r = new Region();
   r.MakeEmpty();
   while(true)
   {
       if(this._Queue.Count == 0)
       {
           break;
       }
       object pBuff = this._Queue.Dequeue();
       IntPtr ip = (IntPtr)pBuff; // queue contains buffers, each buffer is
an array of rects
       // union add buff to region
       this.GetAndUnionRects(ip, re); // iterate all rects, union-add them
each to our region
   }
   RectangleF[] rectArray;
   rectArray = this.GetRegionScans(r);  // crashes in here
   // .... more fun stuff, that we never get to
}

private void GetAndUnionRects(IntPtr ip, Region r)
{
   for(int j = 0; j < this.gArray.ulRects; j++)
   {
       Rectangle rect = this.GetRect(this.gArray.Rects[j]);
       r.Union(rect); // this is where we add a rect into the region
   }
}

private RectangleF[] GetRegionScans(Region re)
{
   Matrix m = new Matrix();
   m.Reset();
   RectangleF[] rects = re.GetRegionScans(m); // this line throws the
StackOverflowException!!!
   return rects;
}

********************* my code ****************************

assaf

hi david.

the user through interaction with the application causes rectangles to be
added to the region.
so if the user interacts a lot, many rectangles will be added to the region.

assaf