# define XFORM_FORMAT_JPEG "image/jpeg"
# define XFORM_FORMAT_PCL "application/vnd.hp-pcl"
# define XFORM_FORMAT_PDF "application/pdf"
+# define XFORM_FORMAT_PNG "image/png"
# define XFORM_FORMAT_POSTSCRIPT "application/postscript"
# define XFORM_FORMAT_PWG_RASTER "image/pwg-raster"
# define XFORM_FORMAT_TEXT "text/plain"