public function saveTocache(Image $image, $namespace, $width, $height, $flag, $filename)
{
$this->cache->save($this->getCacheName($namespace, $width, $height, $flag, $filename), $image->toString(), array(Cache::EXPIRE => $this->cacheInvalidationTime, Cache::SLIDING => TRUE, Cache::FILES => $this->wwwDir . '/' . $this->prefix . '/' . $namespace . '/' . $filename));
return true;
}
