#!/usr/bin/env zsh
# Copyright (C) 2022-2023 Sergey Matveev <stargrave@stargrave.org>
-VERSION=0.3.0
+VERSION=0.4.0
set -e
jpgs=()
pngs=()
-ppms_jxl=()
-ppms_webp=()
+pams_jxl=()
+pams_webp=()
for img ($imgs) {
[[ -r .info/$img.img ]]
if [[ $img:e = jxl ]] ; then
grep -q "JPEG bitstream reconstruction" .info/$img.img &&
jpgs=($jpgs $img) || pngs=($pngs $img)
}
- [[ -r preview/$img.webp ]] || ppms_jxl=($ppms_jxl $img)
+ [[ -r preview/$img.webp ]] || pams_jxl=($pams_jxl $img)
else
- [[ -r preview/$img.webp ]] || ppms_webp=($ppms_webp $img)
+ [[ -r preview/$img.webp ]] || pams_webp=($pams_webp $img)
fi
}
}
jpgs=()
+djxl2pam="( djxl --quiet {} ppm:- || djxl --quiet {} pgm:- )"
[[ ${#pngs} == 0 ]] || {
echo PNG generation... >&2
- parallel "${0:h}/djxl2ppm {}" ::: $pngs
- parallel "pamtopng < {}.ppm > {}.png && rm {}.ppm" ::: $pngs
+ parallel "$djxl2pam | pamtopng > {}.png" ::: $pngs
parallel "pngcrush -warn -rem alla -rem allb -z 2 {}.png alt/{}.png && rm {}.png" ::: $pngs
parallel "advpng --quiet --recompress -4 alt/{}.png && touch -r {} alt/{}.png" ::: $pngs
}
pngs=()
-[[ ${#ppms_jxl} == 0 ]] || {
- echo JPEG XL decompression for preview... >&2
- parallel "${0:h}/djxl2ppm {}" ::: $ppms_jxl
+mkpreview="pnmscale -w 100"
+mkpreview="$mkpreview | cwebp -quiet -pass 10 -alpha_filter best -m 6 -o preview/{}.webp -- -"
+mkpreview="$mkpreview && touch -r {} preview/{}.webp"
+[[ ${#pams_jxl} == 0 ]] || {
+ echo JPEG XL previews... >&2
+ parallel "$djxl2pam | $mkpreview" ::: $pams_jxl
}
-[[ ${#ppms_webp} == 0 ]] || {
- echo WebP decompression for preview... >&2
- parallel "dwebp {} -ppm -o {}.ppm" ::: $ppms_webp
+[[ ${#pams_webp} == 0 ]] || {
+ echo WebP previews... >&2
+ parallel "dwebp {} -ppm -o - | $mkpreview" ::: $pams_webp
}
-ppms=($ppms_jxl $ppms_webp)
-[[ ${#ppms} == 0 ]] || {
- echo Preview scaling and WebP compression... >&2
- parallel "pnmscale -w 100 < {}.ppm > {}.ppm.ppm && mv {}.ppm.ppm {}.ppm && cwebp -quiet -pass 10 -alpha_filter best -m 6 -o preview/{}.webp {}.ppm && rm {}.ppm && touch -r {} preview/{}.webp" ::: $ppms
-}
-ppms_jxl=()
-ppms_webp=()
-ppms=()
+pams_jxl=()
+pams_webp=()
for (( i=1 ; i <= ${#imgs} ; i++ )) {
local img=${imgs[$i]}