(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::getImageGravity — Gets the image gravity
Gets the current gravity value of the image. Unlike Imagick::getGravity(), this method returns the gravity defined for the current image sequence. 此方法在Imagick基于ImageMagick 6.4.4以上版本编译时可用。
Returns the images gravity property. Refer to the list of gravity constants.