2 # Copyright (C) 2022-2023 Sergey Matveev <stargrave@stargrave.org>
8 pagesize=${PAGESIZE:-100}
9 ordering=${ORDERING:-Om}
21 [[ -z $style ]] || style="<link rel=\"stylesheet\" type=\"text/css\" href=\"$style\">"
23 mkdir -p alt .info preview
27 for img (*.jxl(N)) { [[ -r .info/$img.img ]] || imgs=($imgs $img) }
28 [[ ${#imgs} == 0 ]] || {
29 echo JPEG XL info... >&2
30 parallel "jxlinfo {} > .info/{}.img" ::: $imgs
34 for img (*.webp(N)) { [[ -r .info/$img.img ]] || imgs=($imgs $img) }
35 [[ ${#imgs} == 0 ]] || {
37 parallel "webpinfo {} > .info/{}.img" ::: $imgs
42 for img ($src) { [[ -r .info/$img.exif ]] || imgs=($imgs $img) }
44 [[ ${#imgs} == 0 ]] || {
46 parallel "exiftool -escapeHTML -htmlFormat -groupHeadings --${=${(j/ --/)exifTagsOmit}} {} > .info/{}.exif" ::: $imgs
49 imgs=((*.jxl|*.webp)($ordering))
50 pages=$(( ${#imgs} / $pagesize ))
51 [[ $(( $pages * $pagesize )) -lt ${#imgs} ]] && pages=$(( $pages + 1 ))
54 trap "rm -f $tmp" HUP PIPE INT QUIT TERM EXIT
61 [[ -r .info/$img.img ]]
62 if [[ $img:e = jxl ]] ; then
63 [[ -r alt/$img.jpg ]] || [[ -r alt/$img.png ]] && : || {
64 grep -q "JPEG bitstream reconstruction" .info/$img.img &&
65 jpgs=($jpgs $img) || pngs=($pngs $img)
67 [[ -r preview/$img.webp ]] || pams_jxl=($pams_jxl $img)
69 [[ -r preview/$img.webp ]] || pams_webp=($pams_webp $img)
73 [[ ${#jpgs} == 0 ]] || {
74 echo JPEG reconstruction... >&2
75 parallel "djxl --quiet {} alt/{}.jpg && touch -r {} alt/{}.jpg" ::: $jpgs
79 djxl2pam="( djxl --quiet {} ppm:- || djxl --quiet {} pgm:- )"
80 [[ ${#pngs} == 0 ]] || {
81 echo PNG generation... >&2
82 parallel "$djxl2pam | pamtopng > {}.png" ::: $pngs
83 parallel "pngcrush -warn -rem alla -rem allb -z 2 {}.png alt/{}.png && rm {}.png" ::: $pngs
84 parallel "advpng --quiet --recompress -4 alt/{}.png && touch -r {} alt/{}.png" ::: $pngs
88 mkpreview="pnmscale -w 100"
89 mkpreview="$mkpreview | cwebp -quiet -pass 10 -alpha_filter best -m 6 -o preview/{}.webp -- -"
90 mkpreview="$mkpreview && touch -r {} preview/{}.webp"
91 [[ ${#pams_jxl} == 0 ]] || {
92 echo JPEG XL previews... >&2
93 parallel "$djxl2pam | $mkpreview" ::: $pams_jxl
95 [[ ${#pams_webp} == 0 ]] || {
96 echo WebP previews... >&2
97 parallel "dwebp {} -ppm -o - | $mkpreview" ::: $pams_webp
102 for (( i=1 ; i <= ${#imgs} ; i++ )) {
103 local img=${imgs[$i]}
105 local dst=$i.img.html
106 local p=$(( ( $i / $pagesize ) + 1 ))
111 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
112 <meta name="generator" content="galgen $VERSION">
114 <title>Image ${i}/${#imgs}: $img</title>
115 <link href="1.page.html" rel="start" title="home">
116 <link href="${p}.page.html" rel="up" title="page">
119 echo "<link href=\"$(( $i - 1 )).img.html\" rel=\"prev\" title=\"previous\">" >> $tmp
120 [[ $i -eq ${#imgs} ]] ||
121 echo "<link href=\"$(( $i + 1 )).img.html\" rel=\"next\" title=\"next\">" >> $tmp
127 echo "<a href=\"$(( $i - 1 )).img.html\"><<<</a>" >> $tmp
128 echo "<a href=\"${p}.page.html\">^^^</a>" >> $tmp
129 [[ $i -eq ${#imgs} ]] ||
130 echo "<a href=\"$(( $i + 1 )).img.html\">>>></a>" >> $tmp
131 echo "<hr/><img alt=\"$img\" src=\"$img\"/>" >> $tmp
132 [[ -r ${img}.txt ]] && {
133 echo "<hr/><pre>" >> $tmp
134 cat ${img}.txt >> $tmp
135 echo "</pre>" >> $tmp
137 [[ -r ${img}.html ]] && cat ${img}.html >> $tmp
139 [[ -r .info/$img.img ]]
141 cat .info/$img.img >> $tmp
142 echo "</pre>" >> $tmp
143 if [[ $img:e = jxl ]] ; then
144 echo "Alternative formats:" >> $tmp
145 [[ -r alt/$img.jpg ]] && {
146 echo "<a href=\"alt/$img.jpg\">JPEG</a>" >> $tmp
148 echo "<a href=\"$img.png\">PNG</a>" >> $tmp
152 [[ -r .info/$img.exif ]]
153 cat .info/$img.exif >> $tmp
154 echo "</body></html>" >> $tmp
155 cmp -s $tmp $dst || {
161 for (( p=1 ; p <= $pages ; p++ )) {
162 local dst=$p.page.html
167 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
168 <meta name="generator" content="galgen $VERSION">
170 <title>Page ${p}/$pages</title>
171 <link href="1.page.html" rel="start" title="home">
174 echo "<link href=\"$(( $p - 1 )).page.html\" rel=\"prev\" title=\"previous\">" >> $tmp
175 [[ $p -eq $pages ]] ||
176 echo "<link href=\"$(( $p + 1 )).page.html\" rel=\"next\" title=\"next\">" >> $tmp
185 echo "</pre>" >> $tmp
187 [[ -r .html ]] && cat .html >> $tmp
190 echo "<a href=\"$(( $p - 1 )).page.html\"><<<</a>" >> $tmp
191 [[ $p -eq $pages ]] ||
192 echo "<a href=\"$(( $p + 1 )).page.html\">>>></a>" >> $tmp
193 echo "| <a href=\"1.page.html\">home</a>" >> $tmp
194 echo "| <a href=\"${pages}.page.html\">end</a>" >> $tmp
196 for (( i=1 ; i <= $pagesize ; i++ )) {
197 img=$(( ( $p - 1 ) * $pagesize + $i ))
198 [[ $img -le ${#imgs} ]] || break
199 echo "<a href=\"${img}.img.html\">" >> $tmp
202 [[ -r ${imgs[$img]}.txt ]] && {
203 alt=`cat ${imgs[$img]}.txt`
204 title="title=\"$alt\""
206 echo "<img alt=\"$alt\" $title src=\"preview/${imgs[$img]}.webp\"/></a>" >> $tmp
208 echo "</body></html>" >> $tmp
209 cmp -s $tmp $dst || {