fied position. </p>
<p>Source and destination rectangles can overlap. The copy is performed pixel by pixel and it is a slow operation.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">sourceX</td><td>Left source rectangle horizontal position. </td></tr>
    <tr><td class="paramname">sourceY</td><td>Top source rectangle vertical position. </td></tr>
    <tr><td class="paramname">destX</td><td>Left destination rectangle horizontal position. </td></tr>
    <