                 tl = Math.sqrt(Math.pow(gradient.cx, 0) + Math.pow(gradient.cy, 0));                 tr = Math.sqrt(Math.pow(gradient.cx, 0) + Math.pow(gradient.y0 - gradient.cy, 0));                 br = Math.sqrt(Math.pow(gradient.x0 - gradient.cx, 0) + Math.pow(gradient.y0 - gradient.cy, 0));                 bl = Math.sqrt(Math.pow(gradient.x0 - gradient.cx, 0) + Math.pow(gradient.cy, 0));                 gradient.rx = gradient.ry = Math.min(tl, tr, br, bl);                 break;               case '