// init vars
			var theta, angle, cx, cy, px, py;
			// make sure that w + h are larger than 2*cornerRadius
			if (cornerRadius>Math.min(w, h)/2) {
				cornerRadius = Math.min(w, h)/2;
			}
			// theta = 45 degrees in radians
			theta = Math.PI/4;
			// draw top line
			this.moveTo(x+cornerRadius, y);
			this.lineTo(x+w-cornerRadius, y);
			//angle is currently 90 degrees
			angle = -Math.PI/2;
			// draw tr corner in two parts
			cx = x+w-cornerRadius+(Math.cos(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			cy = y+cornerRadius+(Math.sin(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			px = x+w-cornerRadius+(Math.cos(angle+theta)*cornerRadius);
			py = y+cornerRadius+(Math.sin(angle+theta)*cornerRadius);
			this.curveTo(cx, cy, px, py);
			angle += theta;
			cx = x+w-cornerRadius+(Math.cos(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			cy = y+cornerRadius+(Math.sin(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			px = x+w-cornerRadius+(Math.cos(angle+theta)*cornerRadius);
			py = y+cornerRadius+(Math.sin(angle+theta)*cornerRadius);
			this.curveTo(cx, cy, px, py);
			// draw right line
			this.lineTo(x+w, y+h-cornerRadius);
			// draw br corner
			angle += theta;
			cx = x+w-cornerRadius+(Math.cos(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			cy = y+h-cornerRadius+(Math.sin(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			px = x+w-cornerRadius+(Math.cos(angle+theta)*cornerRadius);
			py = y+h-cornerRadius+(Math.sin(angle+theta)*cornerRadius);
			this.curveTo(cx, cy, px, py);
			angle += theta;
			cx = x+w-cornerRadius+(Math.cos(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			cy = y+h-cornerRadius+(Math.sin(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			px = x+w-cornerRadius+(Math.cos(angle+theta)*cornerRadius);
			py = y+h-cornerRadius+(Math.sin(angle+theta)*cornerRadius);
			this.curveTo(cx, cy, px, py);
			// draw bottom line
			this.lineTo(x+10, y+h);
			// draw bl corner
			
			angle += theta;
			angle += theta;
			this.lineTo(x-10, y+h+15);
			this.lineTo(x, y+h-5);
			
			
			// draw left line
			this.lineTo(x, y+cornerRadius);
			// draw tl corner
			angle += theta;
			cx = x+cornerRadius+(Math.cos(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			cy = y+cornerRadius+(Math.sin(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			px = x+cornerRadius+(Math.cos(angle+theta)*cornerRadius);
			py = y+cornerRadius+(Math.sin(angle+theta)*cornerRadius);
			this.curveTo(cx, cy, px, py);
			angle += theta;
			cx = x+cornerRadius+(Math.cos(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			cy = y+cornerRadius+(Math.sin(angle+(theta/2))*cornerRadius/Math.cos(theta/2));
			px = x+cornerRadius+(Math.cos(angle+theta)*cornerRadius);
			py = y+cornerRadius+(Math.sin(angle+theta)*cornerRadius);
			this.curveTo(cx, cy, px, py);