NDEX, C_BLACK, 0, 0);
	GrSetMixMode(gstate, MM_INVERT);</PRE>
<PRE>	    /* Erase outline on screen. */</PRE>
<PRE>	    /* If the game piece type is TTPT_BOX, draw a rectangle
	     * outline. Otherwise draw an ellipse outline. */</PRE>
<PRE>	if (pself-&gt;TTP_pieceType == TTPT_BOX) {
	    GrDrawRect(gstate, pself-&gt;TTP_horizPos, pself-&gt;TTP_vertPos,
			 ((pself-&gt;TTP_horizPos) + PIECE_WIDTH),
			 ((pself-&gt;TTP_vertPos) + PIECE_HEIGHT));
	} else {
	    GrDrawEllipse(gstate, pself-&gt;TTP_horizPos, ps