/**
* Optimizes the selected image with optipng, if optipng is even available.
* This function overwrites the existing images. Notice that this will be
* a quite long-running function, but it will save you so much bandwidth
* that it might be worth it.
*
* @todo complete this function and put it in the loop with some checkbox
* @author Woxxy
* @return boolean true if success, false if failure.
*/
public function optipng() {
if ($this->mime != 'image/png')
return false;
$chapter = new Chapter($this->chapter_id);
$comic = new Comic($chapter->comic_id);
$rel = 'content/comics/"' . $comic->directory() . '/' . $chapter->directory() . '/' . $this->filename;
$abs = realpath($rel);
$output = array();
exec('optipng -o7 ' . $abs, $output);
}
