samrxra
fu'ivla
x1 is an image file representing x2 in format x3 and attributes (e.g. size) x4 (ka).
x3 can be filled with a cmevla, e.g. la. djipeg. or la. gif. x4 is for miscellaneous properties associated with the image file, e.g. lo ka se finti la. djan. See also sfaile