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[pngzop] Put working files in /tmp (or $TMPDIR if it exists)

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This commit is contained in:
Glenn Randers-Pehrson
2013-07-01 11:43:18 -05:00
parent c02d9e88fc
commit f1462e8653
1 changed files with 31 additions and 14 deletions
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45
pngzop
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@@ -27,6 +27,18 @@
# Input: *.png
# Output: *_pngzop.png
# Get temporary directory; use TMPDIR if defined, otherwise /tmp
case x${TMPDIR} in
x)
temp=/tmp/pngzop-$$
;;
*)
temp=$TMPDIR/pngzop-$$
;;
esac
mkdir -p $temp
blacken=
directory=.
extension=
@@ -80,15 +92,16 @@ do
root=`echo $x | sed -e s/.png$//`
# prepass to reduce and possibly blacken
pngcrush -q -m 1 -force -reduce $blacken $x ${root}_temp.png
pngcrush -q -m 1 -force -reduce $blacken $x ${temp}/${root}_temp.png
pngzop_get_ihdr.exe < ${root}_temp.png > ${root}_pz.png
pngzop_get_ihdr.exe < ${temp}/${root}_temp.png > ${temp}/${root}_pz.png
# Generate trial PNGs with filter none, 4 PNG filters, and adaptive
# filter
for f in 0 1 2 3 4 5
do
pngcrush -q -m 1 -f $f -force ${root}_temp.png ${root}_f$f.png &
pngcrush -q -m 1 -f $f -force ${temp}/${root}_temp.png \
${temp}/${root}_f$f.png &
done
wait
@@ -96,22 +109,23 @@ do
# IDAT chunks.
for f in 0 1 2 3 4 5
do
pngzop_get_idat.exe < ${root}_f$f.png | zpipe -d > ${root}_f$f.idat &
pngzop_get_idat.exe < ${temp}/${root}_f$f.png | zpipe -d > \
${temp}/${root}_f$f.idat &
done
wait
rm -f ${root}_f?.png
rm -f ${temp}/${root}_f?.png
# Recompress the IDAT data using zopfli
for f in 0 1 2 3 4 5
do
zopfli --i25 --zlib ${root}_f$f.idat &
zopfli --i25 --zlib ${temp}/${root}_f$f.idat &
done
wait
rm -f ${root}_f?.idat
rm -f ${temp}/${root}_f?.idat
# Copy the smallest result to file.zlib
file=${root}_f0.idat.zlib
file=${temp}/${root}_f0.idat.zlib
smallest=$file
smallsize=`ls -l $file | sed -e "
s/[^ ]*[ ]*\
@@ -123,7 +137,7 @@ s/[^ ]*[ ]*\
for f in 1 2 3 4 5
do
file=${root}_f$f.idat.zlib
file=${temp}/${root}_f$f.idat.zlib
size=`ls -l $file | sed -e "
s/[^ ]*[ ]*\
@@ -138,12 +152,15 @@ s/[^ ]*[ ]*\
fi
done
pngzop_zlib_to_idat.exe < $smallest >> ${root}_pz.png
rm -f ${root}_f?.idat.zlib
pngzop_get_iend.exe < ${root}_temp.png >> ${root}_pz.png
pngzop_zlib_to_idat.exe < $smallest >> ${temp}/${root}_pz.png
rm -f ${temp}/${root}_f?.idat.zlib
pngzop_get_iend.exe < ${temp}/${root}_temp.png >> ${temp}/${root}_pz.png
rm ${temp}/${root}_temp.png
# Optimize the CMF bytes and put the result in desired destination.
pngfix -o --quiet --out=${directory}/${root}${extension} ${root}_pz.png
rm ${root}_pz.png
pngfix -o --quiet --out=${directory}/${root}${extension} \
${temp}/${root}_pz.png
rm ${temp}/${root}_pz.png
done
rm -rf $temp