files/g15-helper (Simple bash script to interface to LCD)

g15-helper (text/plain), 1.96 KB, created by Eric Augustus on 2006-02-19 11:09:32 UTC

#!/bin/sh

# g15-helper

# Simple script to format text to be piped to the G15 LCD.

# Eric Augustus <[e-mail]>

# Text: g15lcd input text format is
#       <text_size> "line 1" "line 2" ...
#
# Where <text_size> can be TS|TM|TL (small|medium|large)

# This script takes input that is line-based and converts it to the
# g15lcd format for text.
#
# It requires lines that are formatted as:
#	line 1
#	line 2 ...
#

# Images: g15lcd input image format is
# "P 10001000100101 ...." with exactly 6880 (160x43) 1 or 0's.
# Each 160 char block is a line.

# The image input to this script is the ImageMagick TXT format.
# To convert an image to TXT format, use the ImageMagick "display" cmd:
# 	convert -colors 2 <input_image> <output_image>.txt
# 	convert -colors 2 <input_image> txt:-
# Multicolor images converted to black/white may require the
# "-white-threshold value" option to force pseudo-white pixels to white,
# which is needed for this script.

version="0.2 1/15/06"

# Defaults
[[ -f /etc/conf.d/g15lcd ]] && source /etc/conf.d/g15lcd
GPIPE=${G15PIPE:=/var/run/g15-pipe}
TSIZE=TM


usage() {
cat <<EEOF
$version
Usage: $0 [vhi] [-p pipe] [-s text_size] <file|->

    -p pipe	pipe to send text/image (default is $GPIPE)
    -s tsize	text size (s)mall, (m)edium, or (l)arge
    -i		input is an image file
EEOF
}

# Check parameters
while getopts vhip:s: z
do
  case $z in
  p)	GPIPE=$OPTARG;;
  s)	case $OPTARG in
	    s)	TSIZE=TS;;
	    m)	TSIZE=TM;;
	    l)	TSIZE=TL;;
	    *)	TSIZE=TM;;
	esac
	;;
  i)	IMAGE=1;;
  \?|h)	usage
	exit 2;;
  esac
done

shift $(($OPTIND - 1))


if [ -z "$IMAGE" ]; then
    # Input is text, nl separated
    tr -d "\"\'" | awk -v ts=$TSIZE 'BEGIN {printf "%s ", ts}
	{# strip nl
	printf "\"%s\" ", $0}

	END { printf "\n"}' > $GPIPE
	
else
    # Input is an image
    # Sample input is "ImageMagick pixel enumeration" or TXT format
    egrep -v 'ImageMagick' |awk 'BEGIN{printf "P "};{pix=0;if($3!="white") pix=1;printf "%s",pix};END{printf "\n"}' > $GPIPE
fi