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 ]] || {
30 parallel "jxlinfo {} > .info/{}.img" ::: $imgs
35 for img ($src) { [[ -r .info/$img.exif ]] || imgs=($imgs $img) }
37 [[ ${#imgs} == 0 ]] || {
39 parallel "exiftool -escapeHTML -htmlFormat -groupHeadings --${=${(j/ --/)exifTagsOmit}} {} > .info/{}.exif" ::: $imgs
42 imgs=((*.jxl)($ordering))
43 pages=$(( ${#imgs} / $pagesize ))
44 [[ $(( $pages * $pagesize )) -lt ${#imgs} ]] && pages=$(( $pages + 1 ))
47 trap "rm -f $tmp" HUP PIPE INT QUIT TERM EXIT
49 [[ -n "$NOALT" ]] || {
56 [[ -r .info/$img.img ]]
57 [[ -r alt/$img.jpg ]] || [[ -r alt/$img.png ]] && : || {
58 grep -q "JPEG bitstream reconstruction" .info/$img.img &&
59 jpgs=($jpgs $img) || pngs=($pngs $img)
61 [[ -r preview/$img.webp ]] || pams=($pams $img)
64 [[ ${#jpgs} == 0 ]] || {
65 echo JPEG reconstruction... >&2
66 parallel "djxl --quiet {} alt/{}.jpg && touch -r {} alt/{}.jpg" ::: $jpgs
70 djxl2pam="( djxl --quiet {} ppm:- || djxl --quiet {} pgm:- )"
71 [[ ${#pngs} == 0 ]] || {
72 echo PNG generation... >&2
73 parallel "$djxl2pam | pamtopng > {}.png" ::: $pngs
74 parallel "pngcrush -warn -rem alla -rem allb -z 2 {}.png alt/{}.png && rm {}.png" ::: $pngs
75 parallel "advpng --quiet --recompress -4 alt/{}.png && touch -r {} alt/{}.png" ::: $pngs
80 mkpreview="pnmscale -w 100"
81 mkpreview="$mkpreview | cwebp -quiet -pass 10 -alpha_filter best -m 6 -o preview/{}.webp -- -"
82 mkpreview="$mkpreview && touch -r {} preview/{}.webp"
83 [[ ${#pams} == 0 ]] || {
84 echo Generating previews... >&2
85 parallel "$djxl2pam | $mkpreview" ::: $pams
89 for (( i=1 ; i <= ${#imgs} ; i++ )) {
93 local p=$(( ( $i / $pagesize ) + 1 ))
98 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
99 <meta name="generator" content="galgen $VERSION">
101 <title>Image ${i}/${#imgs}: $img</title>
102 <link href="1.page.html" rel="start" title="home">
103 <link href="${p}.page.html" rel="up" title="page">
106 echo "<link href=\"$(( $i - 1 )).img.html\" rel=\"prev\" title=\"previous\">" >> $tmp
107 [[ $i -eq ${#imgs} ]] ||
108 echo "<link href=\"$(( $i + 1 )).img.html\" rel=\"next\" title=\"next\">" >> $tmp
114 echo "<a href=\"$(( $i - 1 )).img.html\"><<<</a>" >> $tmp
115 echo "<a href=\"${p}.page.html\">^^^</a>" >> $tmp
116 [[ $i -eq ${#imgs} ]] ||
117 echo "<a href=\"$(( $i + 1 )).img.html\">>>></a>" >> $tmp
118 echo "<hr/><img alt=\"$img\" src=\"$img\"/>" >> $tmp
119 [[ -r ${img}.txt ]] && {
120 echo "<hr/><pre>" >> $tmp
121 cat ${img}.txt >> $tmp
122 echo "</pre>" >> $tmp
124 [[ -r ${img}.html ]] && cat ${img}.html >> $tmp
126 [[ -r .info/$img.img ]]
128 cat .info/$img.img >> $tmp
129 echo "</pre>" >> $tmp
130 [[ -n "$NOALT" ]] || {
131 if [[ $img:e = jxl ]] ; then
132 echo "Alternative formats:" >> $tmp
133 [[ -r alt/$img.jpg ]] && {
134 echo "<a href=\"alt/$img.jpg\">JPEG</a>" >> $tmp
136 echo "<a href=\"$img.png\">PNG</a>" >> $tmp
141 [[ -r .info/$img.exif ]]
142 cat .info/$img.exif >> $tmp
143 echo "</body></html>" >> $tmp
144 cmp -s $tmp $dst || {
150 for (( p=1 ; p <= $pages ; p++ )) {
151 local dst=$p.page.html
156 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
157 <meta name="generator" content="galgen $VERSION">
159 <title>Page ${p}/$pages</title>
160 <link href="1.page.html" rel="start" title="home">
163 echo "<link href=\"$(( $p - 1 )).page.html\" rel=\"prev\" title=\"previous\">" >> $tmp
164 [[ $p -eq $pages ]] ||
165 echo "<link href=\"$(( $p + 1 )).page.html\" rel=\"next\" title=\"next\">" >> $tmp
174 echo "</pre>" >> $tmp
176 [[ -r .html ]] && cat .html >> $tmp
179 echo "<a href=\"$(( $p - 1 )).page.html\"><<<</a>" >> $tmp
180 [[ $p -eq $pages ]] ||
181 echo "<a href=\"$(( $p + 1 )).page.html\">>>></a>" >> $tmp
182 echo "| <a href=\"1.page.html\">home</a>" >> $tmp
183 echo "| <a href=\"${pages}.page.html\">end</a>" >> $tmp
185 for (( i=1 ; i <= $pagesize ; i++ )) {
186 img=$(( ( $p - 1 ) * $pagesize + $i ))
187 [[ $img -le ${#imgs} ]] || break
188 echo "<a href=\"${img}.img.html\">" >> $tmp
191 [[ -r ${imgs[$img]}.txt ]] && {
192 alt=`cat ${imgs[$img]}.txt`
193 title="title=\"$alt\""
195 echo "<img alt=\"$alt\" $title src=\"preview/${imgs[$img]}.webp\"/></a>" >> $tmp
197 echo "</body></html>" >> $tmp
198 cmp -s $tmp $dst || {