(Não há informação de versão disponível, talvez apenas no SVN)
Imagick::setImageClipMask — Sets image clip mask
Sets image clip mask from another Imagick object. This method is available if Imagick has been compiled against ImageMagick version 6.3.6 or newer.
clip_mask
The Imagick object containing the clip mask
Returns TRUE
on success.
Throws ImagickException on error.