public function setRegion(int $left, int $top, int $width, int $height) : void
    {
        if ($top < 0 || $left < 0) {
            throw new InvalidArgumentException('Left and top must be non-negative');
        }

        if ($height < 1 || $width < 1) {
            throw new InvalidArgumentException('Width and height must be at least 1');
        }

        $right = $left + $width;
        $bottom = $top + $height;

        if ($bottom > $this->height || $right > $this->width) {
            throw new InvalidArgumentException('The region must fit inside the matrix');
        }

        for ($y = $top; $y < $bottom; ++$y) {
            $offset = $y * $this->rowSize;

            for ($x = $left; $x < $right; ++$x) {
                $index = $offset + ($x >> 5);
                $this->bits[$index] = $this->bits[$index] | (1 << ($x & 0x1f));
            }
        }
    }