Pop\Image\Svg::drawClippingPolygon PHP Метод

    public function drawClippingPolygon($points)
    {
        $this->curClippingPath = count($this->clippingPaths);
        $defs = $this->resource->addChild('defs');
        $clip = $defs->addChild('clipPath');
        $clip->addAttribute('id', 'clip' . $this->curClippingPath);
        $formattedPoints = array();
        foreach ($points as $point) {
            $formattedPoints[] = $point['x'] . ',' . $point['y'];
        }
        $poly = $clip->addChild('polygon');
        $poly->addAttribute('points', implode(' ', $formattedPoints));
        return $this;
    }

 public function testAddClippingPolygon()
 {
     $points = array(array('x' => 320, 'y' => 50), array('x' => 400, 'y' => 100), array('x' => 420, 'y' => 200), array('x' => 280, 'y' => 320), array('x' => 200, 'y' => 180));
     $s = new Svg('graph.svg', '640px', '480px');
     $s->drawClippingPolygon($points)->setClippingPath(0);
     $this->assertEquals(640, $s->getWidth());
 }