(PECL imagick 2, PECL imagick 3)
ImagickDraw::getClipRule — Returns the current polygon fill rule
本函数还未编写文档，仅有参数列表。
Returns the current polygon fill rule to be used by the clipping path.
Returns a FILLRULE constant (imagick::FILLRULE_*).
imagick::FILLRULE_*