mkgallery.pl

   1 #!/usr/bin/perl
   2
   3 # $Id$
   4
   5 # Recursively create image gallery index and slideshow wrappings.
   6 # Makes use of (slightly modified) "lightbox" Javascript/CSS as published
   7 # at http://www.huddletogether.com/projects/lightbox/
   8
   9 # Copyright (c) 2006 Eugene G. Crosser
  10
  11 #  This software is provided 'as-is', without any express or implied
  12 #  warranty.  In no event will the authors be held liable for any damages
  13 #  arising from the use of this software.
  14 #
  15 #  Permission is granted to anyone to use this software for any purpose,
  16 #  including commercial applications, and to alter it and redistribute it
  17 #  freely, subject to the following restrictions:
  18 #
  19 #  1. The origin of this software must not be misrepresented; you must not
  20 #     claim that you wrote the original software. If you use this software
  21 #     in a product, an acknowledgment in the product documentation would be
  22 #     appreciated but is not required.
  23 #  2. Altered source versions must be plainly marked as such, and must not be
  24 #     misrepresented as being the original software.
  25 #  3. This notice may not be removed or altered from any source distribution.
  26
  27 package FsObj;
  28
  29 use strict;
  30 use Carp;
  31 use POSIX qw/getcwd/;
  32 use CGI qw/:html *table *center *div/;
  33 use Image::Info qw/image_info dim/;
  34 use Term::ReadLine;
  35 use Getopt::Long;
  36
  37 use Image::Magick;
  38
  39 my @sizes = (160, 640);
  40
  41 ######################################################################
  42
  43 my $debug = 0;
  44 my $asktitle = 0;
  45 my $noasktitle = 0;
  46
  47 GetOptions('asktitle'=>\$asktitle,
  48                 'noasktitle'=>\$noasktitle,
  49                 'debug'=>\$debug);
  50
  51 my $term = new Term::ReadLine "Edit Title";
  52
  53 FsObj->new(getcwd)->iterate;
  54
  55 sub new {
  56         my $this = shift;
  57         my $class;
  58         my $self;
  59         if (ref($this)) {
  60                 $class = ref($this);
  61                 my $parent = $this;
  62                 my $name = shift;
  63                 my $fullpath = $parent->{-fullpath}.'/'.$name;
  64                 $self = {
  65                                 -parent=>$parent,
  66                                 -root=>$parent->{-root},
  67                                 -base=>$name,
  68                                 -fullpath=>$fullpath,
  69                                 -inc=>'../'.$parent->{-inc},
  70                         };
  71         } else {
  72                 $class = $this;
  73                 my $root=shift;
  74                 $self = {
  75                                 -root=>$root,
  76                                 -fullpath=>$root,
  77                                 -inc=>getinc($root),
  78                         };
  79         }
  80         bless $self, $class;
  81         if ($debug) {
  82                 print "new $class:\n";
  83                 foreach my $k(keys %$self) {
  84                         print "\t$k\t=\t$self->{$k}\n";
  85                 }
  86         }
  87         return $self;
  88 }
  89
  90 sub getinc {
  91         my $fullpath=shift;     # this is not a method
  92         my $depth=20;           # arbitrary max depth
  93
  94         my $inc=".include";
  95         while ( ! -d $fullpath."/".$inc ) {
  96                 $inc = "../".$inc;
  97                 last unless ($depth-- > 0);
  98         }
  99         if ($depth > 0) {
 100                 return $inc.'/';                # prefix with trailing slash
 101         } else {
 102                 return 'NO-.INCLUDE-IN-PATH/';  # won't work anyway
 103         }
 104 }
 105
 106 sub iterate {
 107         my $self = shift;
 108         my $fullpath .= $self->{-fullpath};
 109         print "iterate in dir $fullpath\n" if ($debug);
 110
 111         my @rdirlist;
 112         my @rimglist;
 113         my $D;
 114         unless (opendir($D,$fullpath)) {
 115                 warn "cannot opendir $fullpath: $!";
 116                 return;
 117         }
 118         while (my $de = readdir($D)) {
 119                 next if ($de =~ /^\./);
 120                 my $child = $self->new($de);
 121                 if ($child->isdir) {
 122                         push(@rdirlist,$child);
 123                 } elsif ($child->isimg) {
 124                         push(@rimglist,$child);
 125                 }
 126         }
 127         closedir($D);
 128         my @dirlist = sort {$a->{-base} cmp $b->{-base}} @rdirlist;
 129         undef @rdirlist; # inplace sorting would be handy here
 130         my @imglist = sort {$a->{-base} cmp $b->{-base}} @rimglist;
 131         undef @rimglist; # optimize away unsorted versions
 132
 133         print "Dir: $self->{-fullpath}\n" if ($debug);
 134
 135 # 1. first of all, fill title for this directory and create hidden subdirs
 136
 137         $self->initdir;
 138
 139 # 2. recurse into subdirectories to get their titles filled
 140 #    before we start writing out subalbum list
 141
 142         foreach my $dir(@dirlist) {
 143                 $dir->iterate;
 144         }
 145
 146 # 3. iterate through images to build cross-links,
 147
 148         my $previmg = undef;
 149         foreach my $img(@imglist) {
 150                 # list-linking must be done before generating
 151                 # aux html because aux pages rely on prev/next refs
 152                 if ($previmg) {
 153                         $previmg->{-nextimg} = $img;
 154                         $img->{-previmg} = $previmg;
 155                 }
 156                 $previmg=$img;
 157         }
 158
 159 # 4. create scaled versions and aux html pages
 160
 161         foreach my $img(@imglist) {
 162                 # scaled versions must be generated before aux html
 163                 # and main image index because they both rely on
 164                 # refs to scaled images and they may be just original
 165                 # images, this is not known before we try scaling.
 166                 $img->makescaled;
 167                 # finally, make aux html pages
 168                 $img->makeaux;
 169         }
 170
 171 # 5. start building index.html for the directory
 172
 173         $self->startindex;
 174
 175 # 6. iterate through subdirectories to build subalbums list
 176
 177         if (@dirlist) {
 178                 $self->startsublist;
 179                 foreach my $dir(@dirlist) {
 180                         $dir->sub_entry;
 181                 }
 182                 $self->endsublist;
 183         }
 184
 185 # 7. iterate through images to build thumb list
 186
 187         if (@imglist) {
 188                 $self->startimglist;
 189                 foreach my $img(@imglist) {
 190                         print "Img: $img->{-fullpath}\n" if ($debug);
 191                         $img->img_entry;
 192                 }
 193                 $self->endimglist;
 194         }
 195
 196 # 8. comlplete building index.html for the directory
 197
 198         $self->endindex;
 199 }
 200
 201 sub isdir {
 202         my $self = shift;
 203         return ( -d $self->{-fullpath} );
 204 }
 205
 206 sub isimg {
 207         my $self = shift;
 208         my $fullpath = $self->{-fullpath};
 209         return 0 unless ( -f $fullpath );
 210         my $info = image_info($fullpath);
 211         if (my $error = $info->{error}) {
 212                 if (($error !~ "Unrecognized file format") &&
 213                     ($error !~ "Can't read head")) {
 214                         warn "File \"$fullpath\": $error\n";
 215                 }
 216                 return 0;
 217         }
 218         $self->{-isimg} = 1;
 219         $self->{-info} = $info;
 220         return 1;
 221 }
 222
 223 sub initdir {
 224         my $self = shift;
 225         my $fullpath = $self->{-fullpath};
 226         for my $subdir(@sizes, 'html') {
 227                 my $tdir=sprintf "%s/.%s",$self->{-fullpath},$subdir;
 228                 mkdir($tdir,0755) unless ( -d $tdir );
 229         }
 230         $self->edittitle;
 231 }
 232
 233 sub edittitle {
 234         my $self = shift;
 235         my $fullpath = $self->{-fullpath};
 236         my $title;
 237         my $T;
 238         if (open($T,'<'.$fullpath.'/.title')) {
 239                 $title = <$T>;
 240                 $title =~ s/[\r\n]*$//;
 241                 close($T);
 242         }
 243         if ($asktitle || (!$title && !$noasktitle)) {
 244                 my $prompt = $self->{-base};
 245                 $prompt = '/' unless ($prompt);
 246                 my $OUT = $term->OUT || \*STDOUT;
 247                 print $OUT "Enter title for $fullpath\n";
 248                 $title = $term->readline($prompt.' >',$title);
 249                 $term->addhistory($title) if ($title);
 250                 if (open($T,'>'.$fullpath.'/.title')) {
 251                         print $T $title,"\n";
 252                         close($T);
 253                 }
 254         }
 255         unless ($title) {
 256                 $title=substr($fullpath,length($self->{-root}));
 257         }
 258         $self->{-title}=$title;
 259         print "title in $fullpath is $title\n" if ($debug);
 260 }
 261
 262 sub makescaled {
 263         my $self = shift;
 264         my $fn = $self->{-fullpath};
 265         my $name = $self->{-base};
 266         my $dn = $self->{-parent}->{-fullpath};
 267         my ($w, $h) = dim($self->{-info});
 268         my $max = ($w > $h)?$w:$h;
 269
 270         foreach my $size(@sizes) {
 271                 my $nref = '.'.$size.'/'.$name;
 272                 my $nfn = $dn.'/'.$nref;
 273                 my $factor=$size/$max;
 274                 if ($factor >= 1) {
 275                         $self->{$size} = $name; # unscaled version will do
 276                 } else {
 277                         $self->{$size} = $nref;
 278                         if (isnewer($fn,$nfn)) {
 279                                 doscaling($fn,$nfn,$factor,$w,$h);
 280                         }
 281                 }
 282         }
 283 }
 284
 285 sub isnewer {
 286         my ($fn1,$fn2) = @_;                    # this is not a method
 287         my @stat1=stat($fn1);
 288         my @stat2=stat($fn2);
 289         return (!@stat2 || ($stat1[9] > $stat2[9]));
 290         # true if $fn2 is absent or is older than $fn1
 291 }
 292
 293 sub doscaling {
 294         my ($src,$dest,$factor,$w,$h) = @_;     # this is not a method
 295         my $im = new Image::Magick;
 296         my $err;
 297         print "doscaling $src -> $dest by $factor\n" if ($debug);
 298         $err = $im->Read($src);
 299         unless ($err) {
 300                 $im->Scale(width=>$w*$factor,height=>$h*$factor);
 301                 $err=$im->Write($dest);
 302                 warn "ImageMagick: write \"$dest\": $err" if ($err);
 303         } else {        # fallback to command-line tools
 304                 warn "ImageMagick: read \"$src\": $err";
 305                 system("djpeg \"$src\" | pnmscale \"$factor\" | cjpeg >\"$dest\"");
 306         }
 307         undef $im;
 308 }
 309
 310 sub makeaux {
 311         my $self = shift;
 312         my $name = $self->{-base};
 313         my $dn = $self->{-parent}->{-fullpath};
 314         my $pref = $self->{-previmg}->{-base};
 315         my $nref = $self->{-nextimg}->{-base};
 316         my $inc = $self->{-inc};
 317         my $title = $self->{-info}->{'Comment'};
 318         $title = $name unless ($title);
 319
 320         print "slide: \"$pref\"->\"$name\"->\"$nref\"\n" if ($debug);
 321
 322         # slideshow
 323         for my $refresh('static', 'slide') {
 324                 my $fn = sprintf("%s/.html/%s-%s.html",$dn,$name,$refresh);
 325                 my $bakref = sprintf("%s-%s.html",$pref,$refresh);
 326                 my $fwdref = sprintf("%s-%s.html",$nref,$refresh);
 327                 my $imgsrc = sprintf("../.%s/%s",$sizes[1],$name);
 328                 my $toggleref;
 329                 my $toggletext;
 330                 if ($refresh eq 'slide') {
 331                         $toggleref=sprintf("%s-static.html",$name);
 332                         $toggletext = 'Stop!';
 333                 } else {
 334                         $toggleref=sprintf("%s-slide.html",$name);
 335                         $toggletext = 'Play-&gt;';
 336                 }
 337                 my $F;
 338                 unless (open($F,'>'.$fn)) {
 339                         warn "cannot open \"$fn\": $!";
 340                         next;
 341                 }
 342                 if ($refresh eq 'slide') {
 343                         print $F start_html(-title=>$title,
 344                                         -bgcolor=>"#808080",
 345                                         -head=>meta({-http_equiv=>'Refresh',
 346                                                 -content=>"3; url=$fwdref"}),
 347                                         -style=>{-src=>$inc."gallery.css"},
 348                                 ),"\n";
 349
 350                 } else {
 351                         print $F start_html(-title=>$title,
 352                                         -bgcolor=>"#808080",
 353                                         -style=>{-src=>$inc."gallery.css"},
 354                                 ),"\n";
 355                 }
 356                 print $F start_center,"\n",
 357                         h1($title),
 358                         a({-href=>"../index.html"},"Index")," | ",
 359                         a({-href=>$bakref},"&lt;&lt;Prev")," | ",
 360                         a({-href=>$toggleref},$toggletext)," | ",
 361                         a({-href=>$fwdref},"Next&gt;&gt;"),
 362                         p,
 363                         img({-src=>$imgsrc}),"\n",
 364                         end_center,"\n",
 365                         end_html,"\n";
 366                 close($F);
 367         }
 368 }
 369
 370 sub startindex {
 371         my $self = shift;
 372         my $fn = $self->{-fullpath}.'/index.html';
 373         my $IND;
 374         unless (open($IND,'>'.$fn)) {
 375                 warn "cannot open $fn: $!";
 376                 return;
 377         }
 378         $self->{-IND} = $IND;
 379
 380         my $inc = $self->{-inc};
 381         my $title = $self->{-title};
 382         print $IND start_html(-title => $title,
 383                         -style=>{-src=>[$inc."gallery.css",
 384                                         $inc."lightbox.css"]},
 385                         -script=>[{-code=>"var incPrefix='$inc';"},
 386                                 {-src=>$inc."gallery.js"},
 387                                 {-src=>$inc."lightbox.js"}]),
 388                 a({-href=>"../index.html"},"UP"),"\n",
 389                 start_center,"\n",
 390                 h1($title),"\n",
 391                 "\n";
 392 }
 393
 394 sub endindex {
 395         my $self = shift;
 396         my $IND = $self->{-IND};
 397
 398         print $IND end_center,end_html,"\n";
 399
 400         close($IND) if ($IND);
 401         undef $self->{-IND};
 402 }
 403
 404 sub startsublist {
 405         my $self = shift;
 406         my $IND = $self->{-IND};
 407
 408         print $IND h2("Albums"),"\n",start_table,"\n";
 409 }
 410
 411 sub sub_entry {
 412         my $self = shift;
 413         my $IND = $self->{-parent}->{-IND};
 414         my $name = $self->{-base};
 415         my $title = $self->{-title};
 416
 417         print $IND Tr(td(a({-href=>$name.'/index.html'},$name)),
 418                         td(a({-href=>$name.'/index.html'},$title))),"\n";
 419 }
 420
 421 sub endsublist {
 422         my $self = shift;
 423         my $IND = $self->{-IND};
 424
 425         print $IND end_table,"\n",br({-clear=>'all'}),hr,"\n\n";
 426 }
 427
 428 sub startimglist {
 429         my $self = shift;
 430         my $IND = $self->{-IND};
 431
 432         print $IND h2("Images"),"\n";
 433 }
 434
 435 sub img_entry {
 436         my $self = shift;
 437         my $IND = $self->{-parent}->{-IND};
 438         my $name = $self->{-base};
 439
 440         print $IND a({-href=>$name},$name),"\n";
 441 }
 442
 443 sub endimglist {
 444         my $self = shift;
 445         my $IND = $self->{-IND};
 446
 447         print $IND br({-clear=>'all'}),hr,"\n\n";
 448 }
 449
 450 ######################################################################
 451 =cut
 452 ######################################################################
 453
 454 &processdir(getcwd);
 455
 456 sub processdir {
 457         my ($start,$dir)=@_;
 458         my $dn=$start;
 459         $dn .= "/".$dir if ($dir);
 460         unless ( -d $dn ) {
 461                 warn "not a directory: $dn";
 462                 return;
 463         }
 464         my $D;
 465         unless (opendir($D,$dn)) {
 466                 warn "cannot opendir $dn: $!";
 467                 return;
 468         }
 469
 470 # recurse into subdirectories BEFORE opening index file
 471
 472         &iteratedir($D,$start,$dir,sub {
 473                 my ($start,$dir,$base)=@_;
 474                 my $ndir = $dir;
 475                 $ndir .= "/" if ($ndir);
 476                 $ndir .= $base;
 477                 return unless ( -d $start."/".$ndir );
 478                 &processdir($start,$ndir);
 479         });
 480
 481 # fill in title
 482
 483         my $title=&gettitle($dn,$dir);
 484
 485 # get include prefix
 486
 487         my $inc=&getinclude($dn);
 488
 489 # generate directory index unless suppressed
 490
 491         if ( -e $dn."/.noindex" ) {
 492                 open(STDOUT,">/dev/null");
 493         } else {
 494                 open(STDOUT,">".$dn."/index.html");
 495         }
 496
 497 # write HTML header
 498
 499                         -style=>{-src=>[$inc."gallery.css",
 500                                         $inc."lightbox.css"]},
 501                         -script=>[{-code=>"var incPrefix='$inc';"},
 502                                 {-src=>$inc."gallery.js"},
 503                                 {-src=>$inc."lightbox.js"}]),"\n";
 504         print a({-href=>"../index.html"},"UP");
 505         print start_center,"\n";
 506         print h1($title),"\n";
 507
 508 # create list of sub-albums
 509
 510         my $hassubdirs=0;
 511         &iteratedir($D,$start,$dir,sub {
 512                 my ($start,$dir,$base)=@_;
 513                 my $en=sprintf("%s/%s/%s",$start,$dir,$base);
 514                 return unless ( -d $en );
 515                 unless ($hassubdirs) {
 516                         print hr,h2("Albums"),start_table,"\n";
 517                         $hassubdirs=1;
 518                 }
 519                 &subalbum($base,&gettitle($en,$dir."/".$base));
 520         });
 521         print end_table,hr,"\n" if ($hassubdirs);
 522
 523 # create picture gallery
 524
 525         my @piclist=();
 526         my @infolist=();
 527
 528         my $haspics=0;
 529         &iteratedir($D,$start,$dir,sub {
 530                 my ($start,$dir,$base)=@_;
 531                 my $en=sprintf("%s/%s/%s",$start,$dir,$base);
 532                 return unless ( -f $en );
 533                 my $info = image_info($en);
 534                 if (my $error = $info->{error}) {
 535                         if (($error !~ "Unrecognized file format") &&
 536                             ($error !~ "Can't read head")) {
 537                                 print STDERR "File \"$en\": $error\n";
 538                         }
 539                         return;
 540                 }
 541                 if (&processfile($start,$dir,$base,$en,$info)) {
 542                         $haspics=1;
 543                         push(@piclist,$base);
 544                         push(@infolist,$info);
 545                 }
 546         });
 547
 548 # write HTML footer
 549
 550         print br({-clear=>"all"}),"\n";
 551         print a({-href=>".html/".$piclist[0]."-slide.html"},"Slideshow");
 552         print hr,"\n" if ($haspics);
 553         print end_center,"\n";
 554         print end_html,"\n";
 555
 556         close(STDOUT);
 557         closedir($D);
 558
 559 # generate html files for slideshow from @piclist
 560
 561         for (my $i=0;$i<=$#piclist;$i++) {
 562                 my $base=$piclist[$i];
 563                 my $pbase;
 564                 my $nbase;
 565                 $pbase=$piclist[$i-1] if ($i>0);
 566                 $nbase=$piclist[$i+1] if ($i<$#piclist);
 567                 for my $refresh('static','slide') {
 568                         &mkauxfile($start,$dir,$pbase,$base,$nbase,
 569                                         $refresh,$infolist[$i]);
 570                 }
 571         }
 572
 573 }
 574
 575 #############################################################
 576 # helper functions
 577 #############################################################
 578
 579 sub iteratedir {
 580         my ($D,$start,$dir,$prog)=@_;
 581         my @list=();
 582         while (my $de=readdir($D)) {
 583                 next if ($de =~ /^\./);
 584                 push(@list,$de);
 585         }
 586         foreach my $de(sort @list) {
 587                 &$prog($start,$dir,$de);
 588         }
 589         rewinddir($D);
 590 }
 591
 592 sub getinclude {
 593         my ($dn)=@_;
 594
 595         my $depth=20;
 596         my $str="";
 597         #print STDERR "start include ",$dn."/".$str.".include","\n";
 598         while ( ! -d $dn."/".$str.".include" ) {
 599                 #print STDERR "not include ",$dn."/".$str.".include","\n";
 600                 $str.="../";
 601                 last unless ($depth--);
 602         }
 603         #print STDERR "end include ",$dn."/".$str.".include","\n";
 604         if ( -d $dn."/".$str.".include" ) {
 605                 #print STDERR "return include ".$str.".include/".$fn,"\n";
 606                 return $str.".include/";
 607         } else {
 608                 return ""; # won't work anyway but return something
 609         }
 610 }
 611
 612 sub gettitle {
 613         my ($dir,$dflt)=@_;
 614
 615         my $F;
 616         my $str;
 617         if (open($F,"<".$dir."/.title")) {
 618                 $str=<$F>;
 619                 chop $str;
 620                 close($F);
 621         } else {
 622                 print STDERR "enter title for $dir\n";
 623                 $str=<>;
 624                 if ($str =~ /^\s*$/) {
 625                         $str=$dflt;
 626                 }
 627                 if (open($F,">".$dir."/.title")) {
 628                         print $F $str,"\n";
 629                         close($F);
 630                 } else {
 631                         print STDERR "cant open .title in $dir for writing: $!";
 632                 }
 633         }
 634         return $str;
 635 }
 636
 637 sub subalbum {
 638         my ($base,$title)=@_;
 639
 640         print Tr({-bgcolor=>"#c0c0c0"},
 641                 td(a({-href=>$base."/index.html"},$base)),
 642                 td(a({-href=>$base."/index.html"},$title))),"\n";
 643 }
 644
 645 sub processfile {
 646         my ($start,$dir,$base,$fn,$info)=@_;
 647
 648         my ($w,$h) = dim($info);
 649         my $title=$info->{'Comment'};
 650         $title=$base unless ($title);
 651         my $thumb=&scale($start,$dir,$base,$fn,160,$info);
 652         my $medium=&scale($start,$dir,$base,$fn,640,$info);
 653         print &infobox($info,$base,$fn),"\n";
 654         print table({-class=>'slide'},Tr(td(
 655                 a({-href=>".html/$base-info.html",
 656                         -onClick=>"return showIbox('$base');"},$title),
 657                 br,
 658                 a({-href=>$medium,-rel=>"lightbox",-title=>$title},
 659                         img({-src=>$thumb})),
 660                 br,
 661                 a({-href=>$base},"($w x $h)"),
 662                 br))),"\n";
 663         return 1;
 664 }
 665
 666 sub infobox {
 667         my ($info,$base,$fn)=@_;
 668
 669         my @infokeys=(
 670                 'DateTime',
 671                 'ExposureTime',
 672                 'FNumber',
 673                 'Flash',
 674                 'ISOSpeedRatings',
 675                 'MeteringMode',
 676                 'ExposureProgram',
 677                 'FocalLength',
 678                 'FileSource',
 679                 'Make',
 680                 'Model',
 681                 'Software',
 682         );
 683
 684         my $msg=start_div({-class=>'ibox',-id=>$base,-OnClick=>"HideIbox('$base');"});
 685         $msg.=span({-style=>'float: left;'},"Info for $base").
 686                 span({-style=>'float: right;'},
 687                         a({-href=>"#",-OnClick=>"HideIbox('$base');"},"Close"));
 688         $msg.=br({-clear=>'all'});
 689         $msg.=start_table;
 690         foreach my $k(@infokeys) {
 691                 $msg.=Tr(td($k.":"),td($info->{$k}));
 692         }
 693         $msg.=end_table;
 694         $msg.=end_div;
 695         return $msg;
 696 }
 697
 698 sub mkauxfile {
 699         my ($start,$dir,$pbase,$base,$nbase,$refresh,$info) =@_;
 700         my $en=sprintf("%s/%s/.html/%s-%s.html",$start,$dir,$base,$refresh);
 701         my $pref;
 702         my $nref;
 703         if ($pbase) {
 704                 $pref=sprintf("%s-%s.html",$pbase,$refresh);
 705         } else {
 706                 $pref="../index.html";
 707         }
 708         if ($nbase) {
 709                 $nref=sprintf("%s-%s.html",$nbase,$refresh);
 710         } else {
 711                 $nref="../index.html";
 712         }
 713         my $toggle;
 714         my $toggleref;
 715         if ($refresh eq 'slide') {
 716                 $toggle='Stop!';
 717                 $toggleref=sprintf("%s-static.html",$base);
 718         } else {
 719                 $toggle='Play-&gt;';
 720                 $toggleref=sprintf("%s-slide.html",$base);
 721         }
 722
 723         my $tdir=sprintf "%s/%s/.html",$start,$dir;
 724         mkdir($tdir,0755) unless ( -d $tdir );
 725
 726         unless (open(STDOUT,">".$en)) {
 727                 warn "cannot open $en: $!";
 728                 return;
 729         }
 730         my $title=$info->{'Comment'};
 731         $title=$base unless ($title);
 732         if ($refresh eq 'slide') {
 733                 print start_html(-title=>$title,
 734                                 -bgcolor=>"#808080",
 735                         -head=>meta({-http_equiv=>'Refresh',
 736                                 -content=>"3; url=$nref"})),"\n";
 737         } else {
 738                 print start_html(-title=>$title,
 739                                 -bgcolor=>"#808080"),"\n";
 740         }
 741         print start_center,"\n";
 742         print h1($title);
 743         print a({-href=>"../index.html"},"Index")," | ";
 744         print a({-href=>$pref},"&lt;&lt;Prev")," | ";
 745         print a({-href=>$toggleref},$toggle)," | ";
 746         print a({-href=>$nref},"Next&gt;&gt;");
 747         print p;
 748         print img({-src=>"../.640/".$base}),"\n";
 749         print end_center,"\n";
 750         print end_html,"\n";
 751         close(STDOUT);
 752 }
 753
 754 sub scale {
 755         my ($start,$dir,$base,$fn,$tsize,$info)=@_;
 756         my ($w,$h) = dim($info);
 757         my $max=($w>$h)?$w:$h;
 758         my $factor=$tsize/$max;
 759
 760         return $base if ($factor >= 1);
 761
 762         my $tdir=sprintf "%s/%s/.%s",$start,$dir,$tsize;
 763         mkdir($tdir,0755) unless ( -d $tdir );
 764         my $tbase=sprintf ".%s/%s",$tsize,$base;
 765         my $tfn=sprintf "%s/%s",$tdir,$base;
 766         my @sstat=stat($fn);
 767         my @tstat=stat($tfn);
 768         return $tbase if (@tstat && ($sstat[9] < $tstat[9])); # [9] -> mtime
 769
 770         print STDERR "scale by $factor from $fn to $tfn\n";
 771         &doscaling($fn,$tfn,$factor,$w,$h);
 772         return $tbase;
 773 }
 774
 775 sub doscaling {
 776         my ($src,$dest,$factor,$w,$h)=@_;
 777
 778         my $im=new Image::Magick;
 779         my $err;
 780         #print STDERR "doscale $src -> $dest by $factor\n";
 781         $err=$im->Read($src);
 782         unless ($err) {
 783                 $im->Scale(width=>$w*$factor,height=>$h*$factor);
 784                 $err=$im->Write($dest);
 785                 warn "ImageMagic: write \"$dest\": $err" if ($err);
 786         } else {
 787                 warn "ImageMagic: read \"$src\": $err";
 788                 system("djpeg \"$src\" | pnmscale \"$factor\" | cjpeg >\"$dest\"");
 789         }
 790         undef $im;
 791 }