$db = get_db();
$sql = " SELECT item_id, filename\n\tFROM {$db->File} files, {$db->Item} items\n\tWHERE files.item_id = items.id ";
if ($collection_id != "") {
    $sql .= " AND items.collection_id = {$collection_id}";
}
$file_ids = $db->fetchAll($sql);
$originalDir = FILES_DIR . DIRECTORY_SEPARATOR . 'original' . DIRECTORY_SEPARATOR;
foreach ($file_ids as $one_id) {
    $filename = $originalDir . $one_id["filename"];
    $computer_size = filesize($filename);
    $decimals = 2;
    $sz = 'BKMGTP';
    $factor = floor((strlen($computer_size) - 1) / 3);
    $human_size = sprintf("%.{$decimals}f", $computer_size / pow(1024, $factor)) . @$sz[$factor];
    $item_id = $one_id["item_id"];
    $fp = new ZoomifyFileProcessor();
    list($root, $ext) = $fp->getRootAndDotExtension($filename);
    $sourcePath = $root . '_zdata';
    $destination = str_replace("/original/", "/zoom_tiles/", $sourcePath);
    if ($computer_size > $max_picture_size) {
        print "Picture too big, skipped : {$filename} ({$human_size})\n";
    } elseif (file_exists($destination)) {
        print "This picture has already been tiled ({$destination}) : {$human_size} ({$computer_size})\n";
    } else {
        print "En cours : " . $computer_size . "\n";
        $fp->ZoomifyProcess($filename);
        rename($sourcePath, $destination);
        print "Tiling {$filename} [{$item_id}]\n";
    }
}
exit;