ss="property">@next</span> = <span class="literal">null</span>

  Caman.Plugin.register <span class="string">"stackBlur"</span>, (radius) -&gt;
    <span class="keyword">return</span>  <span class="keyword">if</span> isNaN(radius) <span class="keyword">or</span> radius &lt; <span class="number">1</span>
    radius |= <span class="number">0</span>

    pixels = <span class="property">@pixelData</span>
    width = <span class="property">@dimensions</span>.width
    height = <span class="property">@dimensions<