(PECL gmagick >= Unknown)
Gmagick::writeimage — Writes an image to the specified filename
   Writes an image to the specified filename. If the filename parameter is null,
   the image is written to the filename set by Gmagick::readimage() or Gmagick::setimagefilename(). 
  
filenameThe image filename.
The Gmagick object.
Викидає GmagickException у разі помилки.
