int LibRaw::raw2image</h3>
    <p>This function allocates buffer for postprocessing (imgdata.image) and
      fills it with data layout compatible with LibRaw 0.13/0.14 and below. If
      the buffer is already allocated, it will be free()ed and allocated again.</p>
    <p>This function should be called only if your code do postprocessing stage.
      If you use LibRaw's postprocessing calls (see below) you don't need to
      call raw2image().</p>
    <p>The function returns an integer number in accordance