[NiLuJe]

Okay, I lied.

#! /bin/sh
#
# $Id$
#

# Fugly POC
# Be nice!
renice -n 10 $$

# Do some minimal device checks...
# Use Futura if it exists
if [ -f "/usr/java/lib/fonts/Futura-DemiBold.ttf" ] ; then
	CLOCK_FONT="/usr/java/lib/fonts/Futura-DemiBold.ttf"
else
	# Barring that, go with Caecilia, because Helvetica is friggin awful.
	CLOCK_FONT="/usr/java/lib/fonts/Caecilia_LT_75_Bold.ttf"
fi
# Detect the correct screen size... (Adapted from the logic in BatteryStatus)
kmodel="$(cut -c3-4 /proc/usid)"
case "${kmodel}" in
	"24" | "1B" | "1D" | "1F" | "1C" | "20" | "D4" | "5A" | "D5" | "D6" | "D7" | "D8" | "F2" )
		# PaperWhite...
		SCREEN_X_RES=758
		SCREEN_Y_RES=1024
	;;
	* )
		# Handle legacy devices...
		if [ -f "/etc/rc.d/functions" ] && grep "EIPS" "/etc/rc.d/functions" > /dev/null 2>&1 ; then
			. /etc/rc.d/functions
		else
			# Touch
			SCREEN_X_RES=600	# _v_width @ upstart/functions
			SCREEN_Y_RES=800	# _v_height @ upstart/functions
		fi
	;;
esac
# NOTE: Mostly randomly chosen, tweak me if needed
case "${SCREEN_Y_RES}" in
	"800" )
		CLOCK_SIZE="${SCREEN_X_RES}x20"
	;;
	"1200" )
		# FIXME: Can't remember if /etc/rc.d/functions is actually accurate on DX/DXG, or if we need to fake it ourselves
		CLOCK_SIZE="${SCREEN_X_RES}x30"
	;;
	"758" )
		CLOCK_SIZE="${SCREEN_X_RES}x26"
	;;
esac

# And the actual work...
clock_watch()
{
	LAST_TIME="13:37"
	# Let's loop!
	while : ; do
		# Check the time...
		CURRENT_TIME="$(date +%H:%M)"
		if [ "${CURRENT_TIME}" != "${LAST_TIME}" ] ; then
			# It changed, draw the clock!
			LAST_TIME="${CURRENT_TIME}"
			# Start by building a composite of the current screen w/ a clock at the bottom (Kill the undercolor if annoying. Useful when the time changes on the same page).
			/mnt/us/usbnet/bin/fbgrab -z 0 - 2>/dev/null | /mnt/us/linkss/bin/convert PNG:- -gravity south -compose src-over -background "#0000" -fill black -font "${CLOCK_FONT}" -undercolor white -gravity south -size "${CLOCK_SIZE}" caption:"${CURRENT_TIME}" -composite -quality 00 -define png:bit-depth=8 /var/tmp/clock.png
			# And then print it, without flashing
			eips -g /var/tmp/clock.png
			# And clean up behind us
			rm -f /var/tmp/clock.png
		fi
		# See you in thirty!
		sleep 30
	done
	return 0
}

# Sneakily launch the clock watch in the background
clock_watch &
echo "* Clock watch backgrounded w/ PID $!"

# See ya'
exit 0

Since I went all the way with IM, it's friggin' expensive, but hey, it works.