<p>the viewport used</p>
</div>
      
    </li>
  
    <li>
      
        <span class='name'>format</span>
      
      
        <span class='type'>(<tt>Symbol</tt>)</span>
      
      
      
        &mdash;
        <div class='inline'><p>the image format (:jpeg, :png)</p>
</div>
      
    </li>
  
    <li>
      
        <span class='name'>quality</span>
      
      
        <span class='type'>(<tt>Integer</tt>)</span>
      
      
        <em class="default">(defaults to: <tt>nil</tt>)</em>
      
