Do you mean Standard Shadow, Bounding Box Approach, Perspective Shadow Maps or Trapezoidal Shadow Maps type of stuff?
http://www.comp.nus.edu.sg/~tants/tsm.html
These are not possible IMO, because you need direct & fast access to various buffers.
http://www.comp.nus.edu.sg/~tants/tsm.html
These are not possible IMO, because you need direct & fast access to various buffers.