#!/usr/bin/env bash

# generate a QR code and render it as an EPL fragment
# params: x y max_size "QR code contents" [qrencode options]

x=$1
shift
y=$1
shift
max_size=$1
shift
msg=`echo $1 | sed "s/\"/\\\\\"/g"`
shift
#echo $msg
#exit
size=$(qrencode -t PNG -s 1 -m 0 -o - $* "$msg" | pngtopnm | pnmfile | sed "s/^.*raw, //;s/ .*//")
mul=$(expr $max_size / $size)
width=$(expr \( $size \* $mul + 7 \) / 8)
#echo N
echo -n GW$x,$y,$width,$(expr $size \* $mul),
qrencode -t PNG -s $mul -m 0 -o - $* "$msg" | pngtopnm | pgmtopbm -thresh | pnminvert | tail -n +3
echo ""
#echo P