ColorThief\VBox::count PHP Method

    public function count($force = false)
    {
        if (!$this->count_set || $force) {
            $npix = 0;
            // Select the fastest way (i.e. with the fewest iterations) to count
            // the number of pixels contained in this vbox.
            if ($this->volume() > count($this->histo)) {
                // Iterate over the histogram if the size of this histogram is lower than the vbox volume
                foreach ($this->histo as $rgb => $count) {
                    $rgb_array = ColorThief::getColorsFromIndex($rgb, 0, ColorThief::SIGBITS);
                    if ($this->contains($rgb_array, 0)) {
                        $npix += $count;
                    }
                }
            } else {
                // Or iterate over points of the vbox if the size of the histogram is greater than the vbox volume
                for ($i = $this->r1; $i <= $this->r2; $i++) {
                    for ($j = $this->g1; $j <= $this->g2; $j++) {
                        for ($k = $this->b1; $k <= $this->b2; $k++) {
                            $index = ColorThief::getColorIndex($i, $j, $k);
                            if (isset($this->histo[$index])) {
                                $npix += $this->histo[$index];
                            }
                        }
                    }
                }
            }
            $this->count = $npix;
            $this->count_set = true;
        }
        return $this->count;
    }

 /**
  * @covers ColorThief\VBox::count
  */
 public function testCount()
 {
     $this->vbox->r1 = 225 >> ColorThief::RSHIFT;
     $this->vbox->r2 = 247 >> ColorThief::RSHIFT;
     $this->vbox->g1 = 180 >> ColorThief::RSHIFT;
     $this->vbox->g2 = 189 >> ColorThief::RSHIFT;
     $this->vbox->b1 = 130 >> ColorThief::RSHIFT;
     $this->vbox->b2 = 158 >> ColorThief::RSHIFT;
     //$pixels = array(0xE1BE9E, 0xC8BD9E, 0xFFBD9E, 0xE1329E, 0xE1C89E, 0xE1BD64, 0xE1BDC8);
     $this->vbox->histo = array(29427 => 1, 26355 => 1, 32499 => 1, 28883 => 1, 29491 => 1, 29420 => 1, 29433 => 1);
     $this->assertEquals(1, $this->vbox->count());
     $this->vbox->histo[29427] = 2;
     $this->vbox->histo[30449] = 1;
     // Previous result should be cached.
     $this->assertEquals(1, $this->vbox->count());
     // Forcing refresh should now give the right result
     $this->assertEquals(3, $this->vbox->count(true));
 }