private function combine()
{
if (!$this->done) {
if (PHP_VERSION_ID < 50300) {
clearstatcache();
}
$this->checkSrcs();
if (!empty($this->src_infos)) {
$this->checkSizes();
if ($this->dest_width > 20000 || $this->dest_height > 20000) {
throw new Yaf_Exception('combined image size too large may cause out of memory exception');
}
$this->canvas = ImageManager::createTransImage($this->dest_width, $this->dest_height);
switch ($this->combine_mode) {
case self::COMBINE_HORIZONTAL:
$this->done = $this->combineHorizontal();
break;
case self::COMBINE_VERTICAL:
$this->done = $this->combineVertical();
break;
}
}
}
return $this->done;
}
