title: Open source for reading and writing multi layer .psd image
body: <p>I am in Mac OSX, Cocoa .</p>
  
  <p>I want to read and write multi layered .psd images. 
  With Cocoa native api's i can read or write the images as flat images.(i.e., single layered)</p>
  
  <p>So is there any 3rd party library available to perform the operations?</p>
  
  <p>This is my earlier query.
  <a href="https://stackoverflow.com/questions/3456560/psd-image-creation-with-layer-properties-using-cgimageref">psd Image creation with layer properties using CGImageRef</a></p>
  
  <p>Thanks,
  Dhana</p>