Portable any map

Hello eog list readers.

I'm not sure that eog support portable any map format (perhaps the files i have tested are not well formatted).

This format does not seem to be supported by the default readers (gweenview, gqview, ...) of some distributions (slackware and ubuntu at least). Do you know some reasons of this poor support (patent problem, buggy specs, ...) ?

Would you accept this feature in eog ? Can i purpose my help to enable this format in eog ?

Thank you for your reading.

Paul.

P.S. : could you cc my address for reply please ?