(PECL haru:0.0.1)
HaruPage::curveTo — Append a Bezier curve to the current path
Append a Bezier curve to the current path. The point (x1, y1) and the point (x2, y2) are used as the control points for a Bezier curve and current point is moved to the point (x3, y3).
Returns TRUE on success.
Throws HaruException on error.