ColorThief\ColorThief::quantizeIter PHP Method

    private static function quantizeIter(&$priorityQueue, $target, $histo)
    {
        $nColors = 1;
        $nIterations = 0;
        while ($nIterations < static::MAX_ITERATIONS) {
            $vBox = $priorityQueue->pop();
            if (!$vBox->count()) {
                /* just put it back */
                $priorityQueue->push($vBox);
                $nIterations++;
                continue;
            }
            // do the cut
            $vBoxes = static::medianCutApply($histo, $vBox);
            if (!(is_array($vBoxes) && isset($vBoxes[0]))) {
                // echo "vbox1 not defined; shouldn't happen!"."\n";
                return;
            }
            $priorityQueue->push($vBoxes[0]);
            if (isset($vBoxes[1])) {
                /* vbox2 can be null */
                $priorityQueue->push($vBoxes[1]);
                $nColors++;
            }
            if ($nColors >= $target) {
                return;
            }
            if ($nIterations++ > static::MAX_ITERATIONS) {
                // echo "infinite loop; perhaps too few pixels!"."\n";
                return;
            }
        }
    }