title: Image manipulation while on touch event is inefficient !
body: <p>I have two images overlayed and i copy pixels from bottom image to top image while ACTION_MOVE. My goal is to give erasing feeling to the user but sometimes it doesn't copy(erase) some parts and it gets worse if touch event is fast( dragging finger fastly).</p>
  
  <p>This is the code i am using for copying pixels </p>
  
  <pre><code>mutable.getPixels(pixels, 0, width, xPos,  yPos, width, height) ;
  mutable2.setPixels(pixels, 0, width,xPos,  yPos, width, height) ;
  </code></pre>