A reminder window that showed as transparent and empty could not be looked at: the window manager's
list leaves dialogs out and says nothing a compositor goes by, and xwd -id refused a window of a
32-bit visual with BadColor (X_QueryColors). xorg_windows answers every window with its class, and
on request its depth, type, state, role and own opacity; a window's screenshot is now cut from the
whole screen as the compositor shows it, and inline answers the image for a session that cannot
read the machine's files. Declares xorg-xwininfo, which both now use.
jschoubben
79f5f1e8ed