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 ]] || ppms_jxl=($ppms_jxl $img)
69 [[ -r preview/$img.webp ]] || ppms_webp=($ppms_webp $img)
73 [[ ${#jpgs} == 0 ]] || {
74 echo JPEG reconstruction... >&2
75 parallel "djxl --quiet {} alt/{}.jpg && touch -r {} alt/{}.jpg" ::: $jpgs
79 [[ ${#pngs} == 0 ]] || {
80 echo PNG generation... >&2
81 parallel "${0:h}/djxl2ppm {}" ::: $pngs
82 parallel "pamtopng < {}.ppm > {}.png && rm {}.ppm" ::: $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 [[ ${#ppms_jxl} == 0 ]] || {
89 echo JPEG XL decompression for preview... >&2
90 parallel "${0:h}/djxl2ppm {}" ::: $ppms_jxl
92 [[ ${#ppms_webp} == 0 ]] || {
93 echo WebP decompression for preview... >&2
94 parallel "dwebp {} -ppm -o {}.ppm" ::: $ppms_webp
96 ppms=($ppms_jxl $ppms_webp)
97 [[ ${#ppms} == 0 ]] || {
98 echo Preview scaling and WebP compression... >&2
99 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
105 for (( i=1 ; i <= ${#imgs} ; i++ )) {
106 local img=${imgs[$i]}
108 local dst=$i.img.html
109 local p=$(( ( $i / $pagesize ) + 1 ))
114 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
115 <meta name="generator" content="galgen $VERSION">
117 <title>Image ${i}/${#imgs}: $img</title>
118 <link href="1.page.html" rel="start" title="home">
119 <link href="${p}.page.html" rel="up" title="page">
122 echo "<link href=\"$(( $i - 1 )).img.html\" rel=\"prev\" title=\"previous\">" >> $tmp
123 [[ $i -eq ${#imgs} ]] ||
124 echo "<link href=\"$(( $i + 1 )).img.html\" rel=\"next\" title=\"next\">" >> $tmp
130 echo "<a href=\"$(( $i - 1 )).img.html\"><<<</a>" >> $tmp
131 echo "<a href=\"${p}.page.html\">^^^</a>" >> $tmp
132 [[ $i -eq ${#imgs} ]] ||
133 echo "<a href=\"$(( $i + 1 )).img.html\">>>></a>" >> $tmp
134 echo "<hr/><img alt=\"$img\" src=\"$img\"/>" >> $tmp
135 [[ -r ${img}.txt ]] && {
136 echo "<hr/><pre>" >> $tmp
137 cat ${img}.txt >> $tmp
138 echo "</pre>" >> $tmp
140 [[ -r ${img}.html ]] && cat ${img}.html >> $tmp
142 [[ -r info/$img.img ]]
144 cat info/$img.img >> $tmp
145 echo "</pre>" >> $tmp
146 if [[ $img:e = jxl ]] ; then
147 echo "Alternative formats:" >> $tmp
148 [[ -r alt/$img.jpg ]] && {
149 echo "<a href=\"alt/$img.jpg\">JPEG</a>" >> $tmp
151 echo "<a href=\"$img.png\">PNG</a>" >> $tmp
155 [[ -r info/$img.exif ]]
156 cat info/$img.exif >> $tmp
157 echo "</body></html>" >> $tmp
158 cmp -s $tmp $dst || {
164 for (( p=1 ; p <= $pages ; p++ )) {
165 local dst=$p.page.html
170 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
171 <meta name="generator" content="galgen $VERSION">
173 <title>Page ${p}/$pages</title>
174 <link href="1.page.html" rel="start" title="home">
177 echo "<link href=\"$(( $p - 1 )).page.html\" rel=\"prev\" title=\"previous\">" >> $tmp
178 [[ $p -eq $pages ]] ||
179 echo "<link href=\"$(( $p + 1 )).page.html\" rel=\"next\" title=\"next\">" >> $tmp
188 echo "</pre>" >> $tmp
190 [[ -r .html ]] && cat .html >> $tmp
193 echo "<a href=\"$(( $p - 1 )).page.html\"><<<</a>" >> $tmp
194 [[ $p -eq $pages ]] ||
195 echo "<a href=\"$(( $p + 1 )).page.html\">>>></a>" >> $tmp
196 echo "| <a href=\"1.page.html\">home</a>" >> $tmp
197 echo "| <a href=\"${pages}.page.html\">end</a>" >> $tmp
199 for (( i=1 ; i <= $pagesize ; i++ )) {
200 img=$(( ( $p - 1 ) * $pagesize + $i ))
201 [[ $img -le ${#imgs} ]] || break
202 echo "<a href=\"${img}.img.html\">" >> $tmp
205 [[ -r ${imgs[$img]}.txt ]] && {
206 alt=`cat ${imgs[$img]}.txt`
207 title="title=\"$alt\""
209 echo "<img alt=\"$alt\" $title src=\"preview/${imgs[$img]}.webp\"/></a>" >> $tmp
211 echo "</body></html>" >> $tmp
212 cmp -s $tmp $dst || {