BobStore/tools/png-pre-compress

#!/bin/sh

set -e
set -x

for f in `find $(dirname $0)/../app/src/ -type f -name \*.png`; do
    printf "\n\n=====================================================================\n"
    echo $f | grep -Eo '\.9\.png$' && continue  # do not optimized 9-patch, it breaks them
    singlefile=$(mktemp)
    zopflifile=$(mktemp)
    aapt singleCrunch -v -i $f -o $singlefile || true
    zopflipng --iterations=50 --keepchunks=iCCP --lossy_transparent --splitting=3 -my $f $zopflifile || true
    if [ -s $singlefile ] && [ -s $zopflifile ]; then
	ls -l $singlefile $zopflifile
	if [ $(stat --format="%s" $singlefile) -lt $(stat --format="%s" $zopflifile) ]; then
	    echo "Using aapt singleCrunch for $f"
	    mv $singlefile $f
	else
	    echo "Using zopflipng for $f"
	    mv $zopflifile $f
	fi
    elif [ -s $singlefile ] && [ ! -s $zopflifile ]; then
	mv $singlefile $f
    elif [ ! -s $singlefile ] && [ -s $zopflifile ]; then
	mv $zopflifile $f
    else
	continue
    fi
    exiftool -all= $f
    rm -f $singlefile $zopflifile
done

for f in metadata/*/images/*Screenshots/*.png; do
    exiftool -all= $f
    tmpfile=$(mktemp)
    (zopflipng --filters=01234mepb --lossy_8bit --lossy_transparent -y $f $tmpfile && mv $tmpfile $f) &
done