title: Imagick: setting the gravity on a Imagick item
body: <p>I'm having some real difficulties setting the gravity of an image in Imagick.</p>
  
  <p>I've managed to set the gravity of an ImaickDraw object but I've not been successful setting it in a Imagick object.</p>
  
  <p>Below is the basic code I'm using that the moment.  I've just used the same as for ImagickDraw but obviously it isn't working.</p>
  
  <pre><code>$rating = new Imagick("ratings/" . $rating . ".png");
  $rating-&gt;setGravity (Imagick::GRAVITY_SOUTH);
  $im-&gt;compositeImage($rating, imagick::COMPOSITE_OVER, 20, 20); 
  </code></pre>
  
  <p>Any ideas how to set the gravity for an exisiting image rather than a draw object?</p>
  
  <p>Thanks!</p>