static void TIFFTagExtender(TIFF *tiff)
{
  static const TIFFFieldInfo
    TIFFExtensions[] =
    {
      { 37724, -3, -3, TIFF_UNDEFINED, FIELD_CUSTOM, 1, 1,
        (char *) "PhotoshopLayerData" },
      { 34118, -3, -3, TIFF_UNDEFINED, FIELD_CUSTOM, 1, 1,
        (char *) "Microscope" }
    };

  TIFFMergeFieldInfo(tiff,TIFFExtensions,sizeof(TIFFExtensions)/
    sizeof(*TIFFExtensions));
  if (tag_extender != (TIFFExtendProc) NULL)
    (*tag_extender)(tiff);
  TIFFIgnoreTags(tiff);
}
Unknown