px6/px6_convert.sh

#! /bin/bash

INPUT=$1
OUTPUT=$2
export OW=$3
export OH=$4
W=$5
if [ "$OW" == "" ]; then OW=0; fi
if [ "$OH" == "" ]; then OH=0; fi
OPTIONS="-resize $W -set depth 8 -set colorspace RGB"

#initial conversion
convert-im6 $OPTIONS $INPUT txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^([0-9]*),([0-9]*):.*#([0-9A-Fa-f]{6,8}) +r/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " arr[3] }' > $OUTPUT

echo optimizing >&2

# edge detection
convert-im6 $OPTIONS $INPUT -negate -edge 4 -negate txt:- | awk -v ow=$OW -v oh=$OH 'match($0, /^([0-9]*),([0-9]*):.*#000000/, arr ){ print "PX " arr[1]+ow " " arr[2]+oh " " }' > /tmp/px6_optimize
grep -Ff /tmp/px6_optimize $OUTPUT >  ${OUTPUT}.tmp
grep -Ff /tmp/px6_optimize $OUTPUT >> ${OUTPUT}.tmp
grep -Ff /tmp/px6_optimize $OUTPUT >> ${OUTPUT}.tmp
grep -Ff /tmp/px6_optimize $OUTPUT >> ${OUTPUT}.tmp
cat ${OUTPUT}.tmp >> $OUTPUT
cat $OUTPUT | grep -ve " [a-fA-F0-9]\{6\}00" | shuf > ${OUTPUT}.tmp
mv ${OUTPUT}.tmp $OUTPUT
rm /tmp/px6_optimize