ColorThief\CMap::forcebw PHP Method

    public function forcebw()
    {
        // XXX: won't work yet
        /*
                     vboxes = this.vboxes;
                    vboxes.sort(function (a,b) { return pv.naturalOrder(pv.sum(a.color), pv.sum(b.color) )});
        
                    // force darkest color to black if everything < 5
                    var lowest = vboxes[0].color;
                    if (lowest[0] < 5 && lowest[1] < 5 && lowest[2] < 5)
        vboxes[0].color = [0,0,0];
        
                    // force lightest color to white if everything > 251
                    var idx = vboxes.length-1,
        highest = vboxes[idx].color;
                    if (highest[0] > 251 && highest[1] > 251 && highest[2] > 251)
        vboxes[idx].color = [255,255,255];
        */
    }