(PECL imagick 2.0.0)
Imagick::getImageGreenPrimary — Returns the chromaticy green primary point
本函数还未编写文档，仅有参数列表。
Returns the chromaticity green primary point. Returns an array with the keys "x" and "y".
Returns an array with the keys "x" and "y" on success, throws an ImagickException on failure.
Throws ImagickException on error.