public function Rotate($angle, $x = -1, $y = -1)
{
if ($x == -1) {
$x = $this->x;
}
if ($y == -1) {
$y = $this->y;
}
if (isset($this->angle) && $this->angle != 0) {
$this->_out('Q');
}
$this->angle = $angle;
if ($angle != 0) {
$angle *= M_PI / 180;
$c = cos($angle);
$s = sin($angle);
$cx = $x * $this->k;
$cy = ($this->h - $y) * $this->k;
$this->_out(sprintf('q %.5F %.5F %.5F %.5F %.2F %.2F cm 1 0 0 1 %.2F %.2F cm', $c, $s, -$s, $c, $cx, $cy, -$cx, -$cy));
}
}