xwdtopnm(1) on Linux
The text 8a99c4a02de7, as Debian 12 (Bookworm) shipped it.
convert an X11 or X10 window dump file to a PNM image
Flags it lists
-
-headerdump -
-verbose
The text 8a99c4a02de7, as Debian 12 (Bookworm) shipped it.
convert an X11 or X10 window dump file to a PNM image
-headerdump
-verbose