xwdtopnm(1) on Linux
The text 023060a8c6ef, as Debian 13 (Trixie) shipped it.
convert an X11 or X10 window dump file to a PNM image
Flags it lists
-
-headerdump -
-verbose
The text 023060a8c6ef, as Debian 13 (Trixie) shipped it.
convert an X11 or X10 window dump file to a PNM image
-headerdump
-verbose