title: iOS Does CGBitmapContextCreate copy data?
body: <p>I have written this piece of code:</p>
  
  <pre><code> bitmapData = calloc(1, bitmapByteCount );
   context = CGBitmapContextCreate (bitmapData,
                                   pixelsWide,
                                   pixelsHigh,
                                   8,
                                   bitmapBytesPerRow,
                                   colorSpace,
                                   kCGImageAlphaOnly);
  </code></pre>
  
  <p>When I do this, is CGBitmapContext copying my bitmapData, so after these lines i should be writting</p>
  
  <pre><code>free(bitmapData); 
  </code></pre>