(PECL gmagick >= Unknown)
Gmagick::chopimage — Removes a region of an image and trims
Removes a region of an image and collapses the image to occupy the removed portion.
widthWidth of the chopped area.
heightHeight of the chopped area.
xX origo of the chopped area.
yY origo of the chopped area.
The chopped Gmagick object.
错误时抛出 GmagickException。