public function toGIF()
    {
        $this->extension = 'gif';
        $this->type = IMAGETYPE_GIF;
        $this->mimetype = Utils::getMimetypeByImageType(IMAGETYPE_GIF);
        return $this;
    }
public function toGIF()
    {
        $this->extension = 'gif';
        $this->type = IMAGETYPE_GIF;
        $this->mimetype = Utils::getMimetypeByImageType(IMAGETYPE_GIF);
        return $this;
    }
public function toGIF ( ) { $ this -> extension = 'gif' ; $ this -> type = IMAGETYPE_GIF ; $ this -> mimetype = Utils :: getMimetypeByImageType ( IMAGETYPE_GIF ) ; return $ this ; }
Changes output format to GIF.

@access public
@return \GImage\Image
Changes output format to GIF .