(PECL haru >= 0.0.1)
HaruPage::ellipse — Append an ellipse to the current path
Appends an ellipse to the current path.
Horizontal coordinate of the center.
Vertical coordinate of the center.
The ray of the ellipse in the x direction.
The ray of the ellipse in the y direction.
Returns TRUE on success.
发生错误时抛出 HaruException 异常。