gdImageBrushApply (gdImagePtr im, int x, int y)
{
  int lx, ly;
  int hy;
  int hx;
  int x1, y1, x2, y2;
  int srcx, srcy;
  if (!im->brush)
    {
      return;
    }
  hy = gdImageSY (im->brush) / 2;
  y1 = y - hy;
  y2 = y1 + gdImageSY (im->brush);
  hx = gdImageSX (im->brush) / 2;
  x1 = x - hx;
  x2 = x1 + gdImageSX (im->brush);
  srcy = 0;
  if (im->trueColor)
    {
      if (im->brush->trueColor)
	{
	  for (ly = y1; (ly < y2); ly++)
	    {
	      srcx = 0;
	      for (lx = x1; (lx < x2); lx++)
		{
		  int p;
		  p = gdImageGetTrueColorPixel (im->brush, srcx, srcy);
		  /* 2.0.9, Thomas Winzig: apply simple full transparency */
		  if (p != gdImageGetTransparent (im->brush))
		    {
		      gdImageSetPixel (im, lx, ly, p);
		    }
		  srcx++;
		}
	      srcy++;
	    }
	}
      else
	{
	  /* 2.0.12: Brush palette, image truecolor (thanks to Thorben Kundinger
	     for pointing out the issue) */
	  for (ly = y1; (ly < y2); ly++)
	    {
	      srcx = 0;
	      for (lx = x1; (lx < x2); lx++)
		{
		  int p, tc;
		  p = gdImageGetPixel (im->brush, srcx, srcy);
		  tc = gdImageGetTrueColorPixel (im->brush, srcx, srcy);
		  /* 2.0.9, Thomas Winzig: apply simple full transparency */
		  if (p != gdImageGetTransparent (im->brush))
		    {
		      gdImageSetPixel (im, lx, ly, tc);
		    }
		  srcx++;
		}
	      srcy++;
	    }
	}
    }
  else
    {
      for (ly = y1; (ly < y2); ly++)
	{
	  srcx = 0;
	  for (lx = x1; (lx < x2); lx++)
	    {
	      int p;
	      p = gdImageGetPixel (im->brush, srcx, srcy);
	      /* Allow for non-square brushes! */
	      if (p != gdImageGetTransparent (im->brush))
		{
		  /* Truecolor brush. Very slow
		     on a palette destination. */
		  if (im->brush->trueColor)
		    {
		      gdImageSetPixel (im, lx, ly,
				       gdImageColorResolveAlpha (im,
								 gdTrueColorGetRed
								 (p),
								 gdTrueColorGetGreen
								 (p),
								 gdTrueColorGetBlue
								 (p),
								 gdTrueColorGetAlpha
								 (p)));
		    }
		  else
		    {
		      gdImageSetPixel (im, lx, ly, im->brushColorMap[p]);
		    }
		}
	      srcx++;
	    }
	  srcy++;
	}
    }
}
Unknown