Grafika\Gd\DrawingObject\Rectangle::draw PHP Method

    public function draw($image)
    {
        $x1 = $this->pos[0];
        $x2 = $x1 + $this->getWidth();
        $y1 = $this->pos[1];
        $y2 = $y1 + $this->getHeight();
        if (null !== $this->fillColor) {
            list($r, $g, $b, $alpha) = $this->fillColor->getRgba();
            $fillColorResource = imagecolorallocatealpha($image->getCore(), $r, $g, $b, Editor::gdAlpha($alpha));
            imagefilledrectangle($image->getCore(), $x1, $y1, $x2, $y2, $fillColorResource);
        }
        // Create borders. It will be placed on top of the filled rectangle (if present)
        if (0 < $this->getBorderSize() and null !== $this->borderColor) {
            // With border > 0 AND borderColor !== null
            list($r, $g, $b, $alpha) = $this->borderColor->getRgba();
            $borderColorResource = imagecolorallocatealpha($image->getCore(), $r, $g, $b, Editor::gdAlpha($alpha));
            imagerectangle($image->getCore(), $x1, $y1, $x2, $y2, $borderColorResource);
        }
        return $image;
    }