#!/usr/bin/perl
eval 'exec perl -wS $0 ${1+"$@"}'
	if 0;


############################################################################
# Please change this accordingly if you change the DESTDIR in the tarball 
# distribution Makefile or the --prefix of the RPM installation
$IGALDIR = "/usr/local/share/igal2";
# debug locally
#use File::Basename;
#$IGALDIR = dirname($0);
# for example if you make DESTDIR=/usr then $IGALDIR="/usr/share/igal2"
############################################################################
#
# A short note from Eric Pop the developer of the "old" igal version:
# Note to do-it-yourselvers and Computer Science types:  the IGAL code is
# UGLY.  I'm am amateur programmer, not a CS type.  If my scrappy code runs
# and gives the right results, I'm happy.  If others find it useful, that's
# wonderful.  I hope my comments can help decipher the mess below a bit.  I
# wrote IGAL partly because I wanted another excuse to learn Perl (it's
# useful for my research too) and because other image gallery generators
# had hairy dependencies and didn't do what I needed.  So... my apologies
# if the spaghetti below makes you cringe.  It works for me, so I don't
# really have plans (or time) to clean it up.
#
############################################################################
# If you KNOW you have the ImageMagick package installed (e.g commands like
# identify and convert) then setting this equal to 1 may speed up the code a
# bit (igal will stop checking for these commands every time it runs)
#
$HAVEIM = 0;
############################################################################
# If you KNOW you have the libjpeg stuff installed (e.g commands like cjpeg,
# djpeg and pnmscale) then setting this equal to 1 may speed up the code a
# bit (igal will stop checking for these commands every time it runs)
#
$HAVELJ = 0;
############################################################################

# This is IGAL version 3.2, an online Image GALlery generator.
#   Copyright (C)
#   	2000      Eric Pop,
#   	2003      Wolfgang Trexler,
#   	2019-2024 Johnny A. Solbu
#   	2021      A Martin A. West
#	2024      Daniel Weuthen
#
#   This version was enhanced by:
#   	Wolfgang Trexler (wt) Apr. 2003 - May 2016
#   	Johnny A. Solbu
#   	A Martin West - added video support
#	Daniel Weuthen - Added support to specify directory for templates.
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2 of the License, or
#   (at your option) any later version.
#
#   This program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software
#   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# Author: Eric Pop, Dept. of Electrical Engineering, Stanford University
# Email: epop@stanford.edu
# Enhancements were done by: Wolfgang Trexler, Alexander Zangerl
# EMail: wt-igal@trexler.at
#
# Project manager: Johnny A. Solbu <johnny@solbu.net>

use FileHandle;
use Getopt::Long;
use POSIX qw(ceil floor);
# Check if EXIF Tool library is installed
$ExifTool = eval "use Image::ExifTool; 1" ? 1 : 0;


# some constants
$VERSION = "3.2";
$Getopt::Long::ignorecase = 0;
$itile = "tile.png";
$slidetemplate = "slidetemplate2.html"; 
$slidemovtemplate = "slidemovtemplate2.html"; 
$indextemplate = "indextemplate2.html";
$csstemplate = "igal2.css";
$directorylinefile = "directoryline2.html";
$captionfile = ".captions";
$thumbprefix = ".thumb_";
$slideprefix = ".slide_";
$destback = "";
STDOUT->autoflush("1");

# default command-line argument values
$opt_a = "0";          # to write image size under thumbnails in index page
$opt_c = "0";          # -c to use user-supplied captions
$opt_C = "0";          # same as -c, but preserve image names as captions
$opt_d = ".";          # look in current directory "."
$opt_e = "0";          # write EXIF information under image
$opt_f = "0";          # -f to force thumbnail regeneration
$opt_h = "0";
$opt_i = "index.html"; # name of the main thumbnail index file
$opt_k = "0";          # -k for the captions to also be used as slide titles
$opt_m = "";           # -m Apply a watermark to each image
$opt_n = "0";          # -n to use image file names for the .html files
$opt_o = "";           # -o dir specifies alternate prefix for target links
$opt_p = "3";          # cellpadding value for the thumbnail index tables
$opt_r = "0";          # -r to omit the film reel effect altogether
$opt_s = "0";          # -s to make no slides, just thumbnail links to images
$opt_t = "21";         # height of the .tile.png tiled image
$opt_u = "0";          # write captions under thumbnails on index page
$opt_w = "5";          # index rows are 5 images wide by default
$opt_x = "0";          # -x to omit the image count from the caption
$opt_y = "0";          # max height of a thumbnail (defaults to 75 below)
$opt_ad = "0";         # write out only dimensions
$opt_as = "0";         # write out only file size
$opt_bigy = "0";       # max height of the slides.  use if images are huge.
$opt_con = "";         # options to be passed to convert or cjpeg
$opt_help = "0";       # displays brief usage message; same as -h
$opt_www = "0";        # makes everything world-readable
$opt_xy = "0";         # scale thumbs to n pixels in their longer dimension
$opt_dest = "";        # Destination directory of helper files
$opt_AddSubdir = "0";  # Add subdirectories to index.html file
$opt_pagination = "0"; # maximum number of images on one page, zero means no pagination
$opt_igaldir = "$ENV{'HOME'}/.igal2"; # Directory where to look for custom templates


$usage = <<"END_OF_USAGE";
This is iGal2 v$VERSION an HTML image slide show generator.
Syntax:  igal [-option -option ...]
Options:     -a           write image sizes under thumbnails on index page
             -c           first generate and then use captions
             -C           like -c, but preserve file names as captions
             -d <dir>     operate on files in directory <dir> (.)
             -e           write EXIF information under image (needs Image::ExifTool)
             -f           force thumbnail regeneration
             -h           displays this brief help; same as --help
             -i <file>    name of the main thumbnail index file (index.html)
             -k           use the image captions for the HTML slide titles
             -m <file>    Automatically add watermark to each image
             -n           use image file names for the HTML slide files
             -p <n>       cellpadding value of thumbnail index tables (3)
             -r           omit the film reel effect altogether
             -s           make no HTML slides, link thumbnails to images
             -t <n>       height of the film reel tiled image (21)
             -u           write captions under thumbnails on index page
             -w <n>       rows in thumbnail index are <n> images wide (5)
             -x           omit the image count from the captions
             -y <n>       scale all thumbnails to the same height <n> (75)
             --ad         like -a, but write only the image dimensions
             --as         like -a, but write only the file size (in kbytes)
             --bigy <n>   like -y, use it if you have very large image files
             --con <>     options to pass to convert or cjpeg (e.g. -quality N)
             --help       displays this brief help; same as -h
             --www        make all iGal files world-readable
             --xy <n>     scale thumbs to <n> pixels in their longer dimension
             ------------- N E W   F U N C T I O N S --------------------------
	     --dest <dir> Destination directory for the helper files 
			  (thumbnails, slides, etc.) igal generates. This is
			  relative to the operative directory -d and has to be
			  one level below (.)
	     --AddSubdir  If igal finds further directories beneath your image
	     	          directory -d, it will generate HTML Links in the 
			  index file (index.html) to this directories. 
		 	  Default is (off). Directories given with --dest or 
			  starting with a "." will be ignored.
			  Note: igal will not work recursively, it just adds
                          HTML links to the directories below.
             -m <file>    Automatically add watermark to each image - this
                          works well with a transparent .gif, but anything
                          can be used - edit the "composite" line later on
                          to adjust visibility/position of mark if required
                          Originals will be left with a .unmarked extension
             -o <dir>     Root URL of alternate location for the links to full
                          size images. Use this if your indexes will be in
                          a different location/server from the back end images
             --pagination <n> Maximum number of images on one page.
                          If the given number of images is reached a new page 
                          is started. Pagination number <n> should be a multiple 
                          of parameter -w (default 5).
                          Default 0 - means no pagination at all.
              --igaldir   Use custom templates from this directory (\$HOME/.igal2)
Note:         default values are given in parentheses (where applicable).
Authors:      Johnny A. Solbu <johnny\@solbu.net>
              Wolfgang Trexler <wt-igal\@trexler.at>
              Eric Pop <epop\@stanford.edu> (original igal)
	      contributions: 
              Stewart Addison <contactsxa\@gmail.com>, Riku Kalinen,
              Alexander Zangerl, Daniel Weuthen
URL:          https://github.com/solbu/igal2
END_OF_USAGE

# store command-line options upfront to write in the index <HEAD>
@igal_options = @ARGV;

# process command-line arguments (overriding defaults above)
GetOptions('a','c','C','d=s','e','f','h','i=s','k','m=s','n','o=s',
           'p=i','r','s','t=i','u','w=i','x','y=i','ad','as',
           'bigy=i', 'con=s','help','im','www','xy=i', 'dest=s', 
	   'AddSubdir', 'pagination=s', 'igaldir=s') or die "$usage";

die $usage if ($opt_help or $opt_h);
# deal with the competing -y and --xy options
if (($opt_y == 0) and ($opt_xy == 0)) {
	$opt_y = 75;    # default, if neither -y nor --xy is specified
} else {
	$opt_f = "1";   # if either is specified, force thumbnail regeneration
}
die "Please only specify one of the -y and --xy options\n" if ($opt_y and $opt_xy);
# other error (sanity) checks
die "Please enter nonnegative thumbnail dimensions\n" if (($opt_y < 0) or ($opt_xy < 0));
die "Please enter a nonnegative cellpadding value\n" if ($opt_p < 0);
die "Please choose at least one image per index row\n" if ($opt_w <= 0);
die "Please enter a nonnegative tiled image height\n" if ($opt_t < 0);
die "Please enter a nonnegative pagination value\n" if ($opt_pagination < 0);
$opt_o = "$opt_o/" if ( $opt_o );

die "Critical failure: Lib Image::ExifTool not install but EXIF Tags (option -e) requested\n" if (($ExifTool == 0) and ($opt_e));

# find out if the imagemagick commands exist
$HAVEIM = (&exist("identify") and &exist("convert")) unless ($HAVEIM);
print "\nWARNING:  commands identify/convert missing!\nThe ImageMagick (imagemagick.org) or GraphicsMagick package with compatibility doesn't seem to be\ninstalled.  Image dimensions will not be available in the generated HTML.\nOnly JPG images are supported... falling back onto cjpeg/djpeg/pnmscale.\n\n" unless ($HAVEIM);

# find out if the ffmpeg  exist
$HAVEFF = (&exist("ffmpeg") ) ;
print "\nWARNING:  commands ffmpeg missing!\nWill be unable to process video files\n\n" unless ($HAVEFF);

# give up if no image processing commands can be found
die "ERROR:  the necessary image processing tools aren't installed on your system.\nPlease obtain them as specified above.\n\n" unless ($HAVEIM or $HAVELJ);

# strip any unnecessary slashes from the end of the given $opt_d directory
$opt_d =~ s/\/$//;

# let users store their templates in a $HOME/.igal directory, if it exists,
# instead of the site-wide /usr/local/lib/igal (from line 8 up top)
$IGALDIR = $opt_igaldir if ((-r $opt_igaldir) && (-d $opt_igaldir));

# load up image files from $opt_d into array @imgfiles
opendir DIR, $opt_d or die "Can't open directory $opt_d\n";

# find and read all video, jp(e)g, gif and png files
if ( $HAVEFF ) {
	@movfiles = grep((!/^\./ and /\.mov$/i), readdir DIR);
	rewinddir DIR;   # this is CRUCIAL here!!!
	@mp4files = grep((!/^\./ and /\.mp4$/i), readdir DIR);
	rewinddir DIR;   # this is CRUCIAL here!!!
	@mkvfiles = grep((!/^\./ and /\.mkv$/i), readdir DIR);
	$nmkvfiles = @mkvfiles;
	if ( $nmkvfiles > 0 && isMac() ) {
		print "\nWARNING:  mkv files not supported on Mac, suggest converting to mp4\n\n";		
	}
	@vidfiles = @movfiles;
	push(@vidfiles, @mp4files);
	push(@vidfiles, @mkvfiles);
	@vidfiles = sort @vidfiles;      # sort alphabetically, by file name
} else {
	@vidfiles = ();
}


rewinddir DIR;   # this is CRUCIAL here!!!
@jpgfiles = grep((!/^\./ and /\.jpe?g$/i), readdir DIR);
rewinddir DIR;   # this is CRUCIAL here!!!
@giffiles = grep((!/^\./ and /\.gif$/i), readdir DIR);
rewinddir DIR;   # this is CRUCIAL here!!!
@pngfiles = grep((!/^\./ and /\.png$/i), readdir DIR);
@imgfiles = @jpgfiles;
push(@imgfiles, @giffiles);
push(@imgfiles, @pngfiles);
push(@imgfiles, @vidfiles);

@imgfiles = sort @imgfiles;      # sort alphabetically, by file name
$njpg = @jpgfiles;
$nfiles = @imgfiles;             # how many total image files i've loaded

die "Can't find any image files in directory $opt_d\n" if ($nfiles == 0);

# find out if the libjpeg commands exist
$HAVELJ = (&exist("cjpeg") and &exist("djpeg") &exist("pnmscale")) unless ($HAVELJ or ($njpg == 0) or $HAVEIM);
print "\nWARNING:  at least one of the commands \"cjpeg\", \"djpeg\" and \"pnmscale\" is not\ninstalled.  You can find these at rpmfind.net (inside libjpeg and libgr-progs)\nor you can download the source code from:\n    http://www.ijg.org/ and\n    http://netpbm.sourceforge.net/\n\n" unless ($HAVELJ or ($njpg == 0) or $HAVEIM);



# find and read all directories (except beginning with . and igal destination) for later use
if ($opt_AddSubdir) {
	rewinddir DIR;
	foreach $file (readdir DIR) {
		if (-d "$opt_d/$file" && !($file =~ /^\./) && !($file =~ /$opt_dest/)) {
			push(@directories, $file);
		}
	}
	if (@directories) {
		@directories = sort @directories;      # sort alphabetically, by name
	} else {
		print "Information: Option --AddSubdir is set, but can't find any matching subdiretories!\n";
	}


}

closedir DIR;

# Store image extensions
@imgext = (); @captions = ();

foreach $file (@imgfiles) {
	# store image captions & extensions in separate arrays along the way
	$file =~ m/(^.*)\.(\w{3,4})$/;
	push(@captions, $1);
	push(@imgext, $2);
}


# wt 08.04.03: check for destination directory of igal files, and create it if necessary
$opt_dest =~ s/\/$//;     # strip any unnecessary slashes from the end of the given $opt_dest directory
if (length $opt_dest > 0) {
	if ($opt_dest =~ m/(\/|\\|\#|<|>|%|\"|\s)/) {
		die "\nYour destination directory ($opt_dest) contains a character ($1) which\nis not allowed inside an URL.  URIs may not contain delimiters such as \\, <, >, #, %, \" or \nwhite space.\n\n";
	}
	if (! -d "$opt_d/$opt_dest") {
		mkdir "$opt_d/$opt_dest" or die "Can't create directory for igal files ($opt_d/$opt_dest) [$!]";
	}
	print "Using directory $opt_d/$opt_dest for igal files (except for index.html)\n";
	$opt_dest = "$opt_dest/";	# Append / to directory for further use
	$destback = "../";		# will be used in html later on to find the directory where images reside
}


# if the -c (or -C) option was supplied let user specify captions, else see below
if ($opt_c or $opt_C) {
	if (! -r "$opt_d/$opt_dest$captionfile") {
		# create $captionfile file if it doesn't exist
		print "Found $nfiles image files in directory $opt_d\n";
#		die "Please select more files for your slide show!\n" if ($nfiles <= 1);
		open(CAP,">$opt_d/$opt_dest$captionfile") or die "Can't create $opt_d/$opt_dest$captionfile file\n";
		print "Creating the $opt_dest$captionfile file...\n";
		print CAP "# This is igal's $captionfile file, first generated ", scalar localtime, ".\n";
		print CAP "# To the left of the separator are the image file names.  Enter your captions\n# on the right side, one per line.  The captions may include HTML tags.\n# To add any comments to this file or to exclude any images from the slide \n# show, add a # sign at the beginning of their respective lines.  You may\n# also change the order of images in your slide show at this time.\n\n";
			for ($i = 0; $i < $nfiles; $i++) {
				print CAP "$imgfiles[$i] ---- ";
				print CAP "$captions[$i]" if $opt_C;
				print CAP "\n";
			}
		close(CAP);
		die "Now edit the $opt_dest$captionfile file to your liking and rerun igal -c\n";
	} else {
		# read in files specified in the .captions file
		open(CAP,"$opt_d/$opt_dest$captionfile") or die "Can't open $opt_d/$opt_dest$captionfile file\n";
		@imgfiles = ();     # reset arrays b/c we're rereading them
		@captions = (); @imgext = (); $njpg = 0;
		print "Reading the $captionfile file ... ";
		while (defined($line = <CAP>)) {
			chomp($line); $line =~ s/^\s*//; $line =~ s/\s*$//;
			# only read lines with the ---- delimiter that don't start with #
			if (($line =~ m/\w\s*----\s*/) && !($line =~ m/^\#/)) {
				@arr = split(/\s*----\s*/,$line);
				# first check image extensions
				$temp = $arr[0]; $temp =~ s/^.*\.//;
				push(@imgfiles,$arr[0]);
				push(@imgext, $temp);
				push(@arr,"") if (scalar @arr == 1);
				push(@captions,$arr[1]);
				$njpg++ if ($arr[0] =~ m/jpe?g/i);
			}
		}
		close(CAP);
		$nfiles = @imgfiles;
		print "found $nfiles image files.\n";
		die "Please select more files for your slide show!\n" if ($nfiles < 1);
	}
} else {
	print "Found $nfiles image files in directory $opt_d\n";
}

# initialize the arrays that will hold image file sizes
@xdim=(); @ydim=(); @isiz=();

# Jan 13, 2003:  i played around w/the various ways in which convert can
# resize images, i.e with -scale, -sample, -geometry (equivalent to -resize)
# and lo and behold, i realized that igal will run MUCH faster when resizing
# is done with -scale while quality is about same as with -geometry (in igal
# 1.3 and earlier).  using -sample gives me a bit more speed advantage but
# is not worth using as the scaled-down output seems to be pretty poor.
# here are some timed-runs on a directory w/some images:
# 	* w/convert -sample (poor quality) 7.24 sec
#	* w/convert -scale (ok quality) 9.14 sec
#	* w/convert -resize (ok quality) 23.8 sec
#	* w/cjpeg/djpeg (ok quality) 20.1 sec
# so from now on all convert -scale is used everywhere below because it seems
# to be the clear winner for quality vs speed.

# generate .thumbnails in the same directory with the original image files (or in the given --dest directory)
# if they don't exist already or if the -f switch is given

print "Creating thumbnails:  ";

$tmpthumb = "$opt_d/.thumbtmp.png";

for ($i = 0; $i < $nfiles; $i++) {
	$file = $imgfiles[$i];
	$fullfile = "$opt_d/$file";
	die "Can't open $fullfile\n" unless (-r $fullfile);
	$fullthumb = "$opt_d/$opt_dest$thumbprefix$file";
	if ((! -e $fullthumb) or $opt_f) {
		if ($HAVEIM) {
			# convert -quiet moviefile.mov[10] movieframe.gif
			if (isVideo( $imgext[$i] )) {
				$thumbbasename = $fullthumb;
				$thumbbasename =~ s{^.*/|\.[^.]+$}{}g;
				
#				print( "\nfullthumb:$fullthumb\n");
				# convert has a bug, ignores [frame] option, always give fist frame :-(
				# use ffmpeg and then create thumb from that
				$command = "ffmpeg -y -hide_banner -loglevel error -ss 0.5 -i \"$fullfile\" -vframes 1 \"$tmpthumb\"";
#				print( "\n$command\n\n" );
				system("$command");
				$command = "convert $opt_con -scale x$opt_y  \"$tmpthumb\" \"$opt_d/$thumbbasename.png\"";
#				print( "\n$command\n\n" );
			} else {
				$command = "convert $opt_con -scale x$opt_y \"$fullfile\" \"$fullthumb\"";				
			}
			# opt_xy handling: determine dimensions and scale the bigger dimension
			# Bug fixing code new since version 1.4.7
			if ($opt_xy) {
			        $temp = `identify -ping -format \"\%wx\%h %b\" \"$fullfile\"`;
				$temp =~ m/(\d+)x(\d+)\s([\d\.]+[mkb]*)/i;
				$width = $1; $height = $2; $temp = $3;
				if ($width > $height) {
				    $dimension = "$opt_xy" . "x";
				} else {
				    $dimension = "x" . "$opt_xy";
				}
				if ($imgext[$i] =~ m/(mov|mp4)/i) {
					$fullthumb =~ s{^.*/|\.[^.]+$}{}g;
					$command = "convert $opt_con -scale $dimension \"$fullfile\"[10] \"$fullthumb.png\"";
				} else {}
					$command = "convert $opt_con -scale $dimension \"$fullfile\" \"$fullthumb\"";
				}
		} else {
			if ($imgext[$i] =~ m/(gif|png|mov|mp4)/i) {
				print "\nIgnoring $file:  get ImageMagick (imagemagick.org) to process video, GIF and PNG files.\n";
				$command = 0;
			} else {
				$com1 = "djpeg \"$fullfile\"";
				$com3 = "cjpeg $opt_con -outfile \"$fullthumb\"";
				$scale = "pnmscale -ysize $opt_y";
				$scale = "pnmscale -xysize $opt_xy $opt_xy" if ($opt_xy);
				$command = $com1 . " | " . $scale . " | " . $com3;
			}
		}
		system("$command") if ($command);
		print "$thumbprefix$file " if ($command);
	}
}

# Do this because removing in the loop seems to delete it 
# before it can be processed, oh my brain hurts
if ( -e $tmpthumb ) {	
	system( "rm $tmpthumb");	
}			

print "... done!\n";

# determine image file sizes
if ($HAVEIM && !($opt_bigy)) {
	print "Determining image sizes ";
	for ($i = 0; $i < $nfiles; $i++) {
	
		$fullfile = "$opt_d/$imgfiles[$i]";
		if (isVideo( $imgext[$i] )) {
			next;
		}
		$temp = `identify -ping -format \"\%wx\%h %b\" \"$fullfile\"`;
		$temp =~ m/(\d+)x(\d+)\s([\d\.]+[mkb]*)/i;
		push(@xdim,$1);  push(@ydim,$2);  $temp = $3;
		# round nicely in kb if identify returned the size in bytes
		$temp = sprintf ("%.1fk", $temp/1024) if ($temp =~ s/([\d\.]+)b*$/$1/i);
		push(@isiz,$temp);
		print ".";
	}
	print " done!\n";
}

# scale down slides if the --bigy <n> option was given
if ($opt_bigy and !($opt_s)) {
	if ($HAVEIM) {
		print "Scaling down big slides and determining new slide sizes:  ";
		@xdim=(); @ydim=(); @isiz=();    # reset image size arrays
	} else {
		print "Scaling down big slides:  ";
	}
	for ($i = 0; $i < $nfiles; $i++) {
		if (isVideo( $imgext[$i] )) {
			next;
		}
		$file = $imgfiles[$i];
		$fullfile = "$opt_d/$file";
		die "Can't open $fullfile\n" unless (-r $fullfile);
		$fullslide = "$opt_d/$opt_dest$slideprefix$file";
		if ((! -e $fullslide) or $opt_f) {
			if ($HAVEIM) {
				$command = "convert $opt_con -scale x$opt_bigy \"$fullfile\" \"$fullslide\"";
			} else {
				if ($imgext[$i] =~ m/(gif|png)/i) {
					print "\nIgnoring $file:  get ImageMagick (imagemagick.org) to process GIF and PNG files.\n";
					$command = 0;
				} else {
					$com1 = "djpeg \"$fullfile\"";
					$com3 = "cjpeg $opt_con -outfile \"$fullslide\"";
					$scale = "pnmscale -ysize $opt_bigy";
					$command = $com1 . " | " . $scale . " | " . $com3;
				}
			}
			system("$command") if ($command);
			print "$slideprefix$file " if ($command);
		}
		if ($HAVEIM) {
			$temp = `identify -ping -format \"\%wx\%h %b\" \"$fullslide\"`;
			$temp =~ m/(\d+)x(\d+)\s([\d\.]+[mkb]*)/i;
			push(@xdim,$1);  push(@ydim,$2);  $temp = $3;
			# round nicely in kb if identify returned the size in bytes
			$temp = sprintf ("%.1fk", $temp/1024) if ($temp =~ s/([\d\.]+)b*$/$1/i);
			push(@isiz,$temp);
		}
	}
	print "... done!\n";
}

if ( $opt_m ) {
        # This is a fairly simple watermarking method - this could be made
        # more complex ...
        die "ImageMagick required for watermarking\n" if (! &exist("composite"));
        die "Cannot open watermark file $opt_m" if ( ! -r $opt_m );
        print "Adding watermarks:";
	for ($i = 0; $i < $nfiles; $i++) {
		if ($imgext[$i] =~ m/(mov|mp4)/i) {
			next;
		}
		$file = $imgfiles[$i];
		$original = "$file.unmarked";
		# If original exists, user has re-run the script - don't
		# add a second watermark
                if ( -r $original ) {
                        print " [$file already marked]";
                } else {
                        die "Can't open $file\n" unless (-r $file);
		        rename $file, $original || die "Failed to rename $file to $original";
		        print " $file";
                        # Could add '&& unlink $original' but wouldn't protect against reruns
		        system "composite -dissolve 33 -geometry +20+20 $opt_m $original $file";
		        die "Failed to add watermark to $file" if ( ! -r $file );
		}
        }
        print "\nPre-watermarked files have been left with a .unmarked extension\n";
        print "You may wish to remove those before publishing the gallery\n";
}

# create the individual slide show files
if ($opt_s) {
	print "Linking thumbnails directly to image files...  Making no html slides.\n";
	if (! -e "$opt_d/$opt_dest$csstemplate") {
		print "No CSS template file ... getting $IGALDIR/$csstemplate\n";
		die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
		die "$IGALDIR/$csstemplate cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$csstemplate");
		system("cp -f $IGALDIR/$csstemplate \"$opt_d/$opt_dest\"");
        }
} else {
	$nfiles = @imgfiles;      # total number of files (same as # of captions)
	@slides = ();
	if ($opt_n) {                       # decide on the slide html file names
		for ($i = 0; $i < $nfiles; $i++) {
			$temp = $imgfiles[$i];
			$temp =~ s/\.\w+?$/\.html/; # strip suffix, bug fixing (1.4.5)
			push(@slides,$temp);
		}
	} else {
		for ($i = 0; $i < $nfiles; $i++) {
			push(@slides, $i+1 . ".html");
		}
	}
	system("rm -f \"$opt_d/$opt_dest*.html\"");
	if (! -e "$opt_d/$opt_dest$csstemplate") {
		print "No CSS template file ... getting $IGALDIR/$csstemplate\n";
		die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
		die "$IGALDIR/$csstemplate cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$csstemplate");
		system("cp -f $IGALDIR/$csstemplate \"$opt_d/$opt_dest\"");
	} else {
		print "Found CSS template file $opt_dest$csstemplate ... using it.\n";
	}
	
	if (! -e "$opt_d/$opt_dest.$slidetemplate") {
		print "No $opt_dest.$slidetemplate file ... getting a copy from $IGALDIR/\n";
		die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
		die "$IGALDIR/$slidetemplate cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$slidetemplate");
		system("cp -f $IGALDIR/$slidetemplate \"$opt_d/$opt_dest.$slidetemplate\"");
	} else {
		print "Found $opt_dest.$slidetemplate file ... using it.\n";
	}
	
	if (! -e "$opt_d/$opt_dest.$slidemovtemplate") {
		print "No $opt_dest.$slidemovtemplate file ... getting a copy from $IGALDIR/\n";
		die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
		die "$IGALDIR/$slidemovtemplate cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$slidemovtemplate");
		system("cp -f $IGALDIR/$slidemovtemplate \"$opt_d/$opt_dest.$slidemovtemplate\"");
	} else {
		print "Found $opt_dest.$slidemovtemplate file ... using it.\n";
	}
	
	
	print "Creating individual slides:  ";
	# read slidetemplate from filesystem once
	$slidetemplate_string = read_file_in_string("$opt_d/$opt_dest.$slidetemplate");
	$slidemovtemplate_string = read_file_in_string("$opt_d/$opt_dest.$slidemovtemplate");
	for ($i = 0; $i < $nfiles; $i++) {
		$video = 0;
		if (isVideo( $imgext[$i] )) {
			$video = 1;
		}
		
		if ($video) {
			$workarea = $slidemovtemplate_string;	# fill work area with slidetemplate
		} else {
			$workarea = $slidetemplate_string;	# fill work area with slidetemplate
		}
		open(SW,">$opt_d/$opt_dest$slides[$i]") or die "Can't create slide file\n";
		print "$slides[$i] ";
		if ($opt_k) {    # use image caption for the HTML slide title
			$title = $captions[$i];
		} else {         # otherwise use the image name (strip suffix)
			$title = $imgfiles[$i];
			$title =~ s/\.\w+?$//;
		}
		$workarea =~ s/<!--SLIDE-TITLE-->/$title/g;
		$imgfile_i_encoded = URLencode($imgfiles[$i]);
		if ($opt_bigy && !$video) {
			$slide = URLencode($slideprefix . $imgfiles[$i]);
			if ($HAVEIM) {
				$workarea =~ s/(<.*)<!--THIS-IMAGE-->(.)(.*>)/<A href=\"$destback$imgfile_i_encoded\">$1$slide$2 width=$xdim[$i] height=$ydim[$i] alt=\"$title\" title=\"click to see full-size\"$3<\/a>/;
			} else {
				$workarea =~ s/(<.*)<!--THIS-IMAGE-->(.)(.*>)/<A href=\"$destback$imgfile_i_encoded\">$1$slide$2 alt=\"$title\" title=\"click to see full-size\"$3<\/a>/;
			}
		} else {
			if ($HAVEIM && !$video) {
				$workarea =~ s/<!--THIS-IMAGE-->(.)/$destback$imgfile_i_encoded$1 width=$xdim[$i] height=$ydim[$i] alt=\"$title\"/g;
			} else {
				$workarea =~ s/<!--THIS-IMAGE-->/$destback$imgfile_i_encoded/g;
			}
		}
		
		# add in the image counter unless -x is specified
		if ($opt_x) {
			$imagecaption = $captions[$i];
		} else{
			$imagecaption = $captions[$i] . "&nbsp;&nbsp;&nbsp;(" . ($i+1) ."/$nfiles)" if (! $opt_x);
		}
		$workarea =~ s/<!--IMAGE-CAPTION-->/$imagecaption/g;

		# add EXIF information if -e is specified 
		if ($opt_e) {
		    my $exif=Image::ExifTool::ImageInfo($imgfiles[$i]);
		    my $exifinfo= "<A href=\"javascript:toggle('exifinfo');\">Show/hide EXIF data</A>\n";
		    $exifinfo .= "<DIV id=\"exifinfo\">\n";
		    $exifinfo .= "<TABLE><th>EXIF Tag</th><th>Value</th>\n";
		    for my $k (sort keys %$exif) {
			$exifinfo .= "<TR><TD>$k</TD><TD>".
			    (ref($exif->{$k}) eq "SCALAR"?'Binary data '.length(${$exif->{$k}}).' bytes':$exif->{$k})."</TD></TR>\n";
		    }
		    $exifinfo .= "</TABLE></DIV>\n";
		    $workarea =~ s/<!--EXIF-INFO-->/$exifinfo/g;
                }

		# find out if pagination is used and which number the index file has...
		$index_file_number = ($opt_pagination) ? int ($i / $opt_pagination) : 0;
		$index_filename = ($index_file_number == 0) ? $opt_i : "$index_file_number$opt_i";
		$workarea =~ s/<!--INDEX-FILE-->/$destback$index_filename/g;

		if ($opt_bigy) {
			$pref = $slideprefix;
		} else {
			$pref = $destback;
		}
		if ($i == 0 && $nfiles == 1) {	# special treatment if there is exactly one file!
			$temp = URLencode("$pref$imgfiles[0]");
			$workarea =~ s/<!--NEXT-IMAGE-->/$temp/g;
			$temp = URLencode("$slides[0]");
			$workarea =~ s/<!--PREV-SLIDE-->/\"$temp\" title=\"$captions[0]\"/g;
			$temp = URLencode("$slides[0]");
			$workarea =~ s/<!--NEXT-SLIDE-->/\"$temp\" title=\"$captions[0]\"/g;
		} elsif ($i == 0) {			# first image, previous points to last image
			$temp = URLencode("$pref$imgfiles[$i+1]");
			$workarea =~ s/<!--NEXT-IMAGE-->/$temp/g;
			$temp = URLencode("$slides[$nfiles-1]");
			$workarea =~ s/<!--PREV-SLIDE-->/\"$temp\" title=\"$captions[$nfiles-1]\"/g;
			$temp = URLencode("$slides[$i+1]");
			$workarea =~ s/<!--NEXT-SLIDE-->/\"$temp\" title=\"$captions[$i+1]\"/g;
		} elsif ($i == $nfiles-1) {	# last image, next points to first image
			$temp = URLencode("$pref$imgfiles[0]");
			$workarea =~ s/<!--NEXT-IMAGE-->/$temp/g;
			$temp = URLencode("$slides[$i-1]");
			$workarea =~ s/<!--PREV-SLIDE-->/\"$temp\" title=\"$captions[$i-1]\"/g;
			$temp = URLencode("$slides[0]");
			$workarea =~ s/<!--NEXT-SLIDE-->/\"$temp\" title=\"$captions[0]\"/g;
		} else {
			$temp = URLencode("$pref$imgfiles[$i+1]");
			$workarea =~ s/<!--NEXT-IMAGE-->/$temp/g;
			$temp = URLencode("$slides[$i-1]");
			$workarea =~ s/<!--PREV-SLIDE-->/\"$temp\" title=\"$captions[$i-1]\"/g;
			$temp = URLencode("$slides[$i+1]");
			$workarea =~ s/<!--NEXT-SLIDE-->/\"$temp\" title=\"$captions[$i+1]\"/g;
		}
		print SW "$workarea";
		close(SW);
	}
	
	print "... done!\n";
}


#############################################################################
# create the main index file with all the thumbnails
if ($opt_r) {
	print "Got option -r... omitting film reel effect.\n";
} elsif (! -e "$opt_d/$opt_dest.$itile") {
	print "No $opt_dest.$itile file... getting a copy from $IGALDIR/\n";
	die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
	die "$IGALDIR/$itile cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$itile");
	system("cp -f $IGALDIR/$itile \"$opt_d/$opt_dest.$itile\"");
} else {
	print "Found $opt_dest.$itile file ... using it.\n";
}
# rescale the tiled image if the -t switch was called but -r wasn't
if (($HAVEIM) and (! $opt_r)) {
	$tileh = `identify -ping -format \"\%wx\%h %b\" \"$opt_d\/$opt_dest.$itile\"`;
	$tileh =~ s/\d+x(\d+)\s[\d\.]+./$1/;
	system("mogrify -scale x$opt_t $opt_d/$opt_dest.$itile") if ($opt_t != $tileh);
}

if (! -e "$opt_d/$opt_dest.$indextemplate") {
	print "No $opt_dest.$indextemplate file... getting a copy from $IGALDIR/\n";
	die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
	die "$IGALDIR/$indextemplate cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$indextemplate");
	system("cp -f $IGALDIR/$indextemplate \"$opt_d/$opt_dest.$indextemplate\"");
} else {
	print "Found $opt_dest.$indextemplate ... using it.\n";
}

print "Creating the index file(s) ";
$indexfile = read_file_in_string("$opt_d/$opt_dest.$indextemplate"); # read indexfile in string to parse it
$indexfile =~ s/<!--#IGAL-OPTIONS#-->/@igal_options/g;     # set comment about igal options in index file
$indexfile =~ s/<!--#IGAL-CSS#-->/$opt_dest$csstemplate/g; # set the name (and path) of css template file

# Generate the links for directories
if ($opt_AddSubdir && @directories) {

	if (! -e "$opt_d/$opt_dest.$directorylinefile") {
		print "No $opt_dest.$directorylinefile file ... getting a copy from $IGALDIR/\n";
		die "$IGALDIR cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r $IGALDIR);
		die "$IGALDIR/$directorylinefile cannot be read or does not exist.\nPlease install igal properly.\n" unless (-r "$IGALDIR/$directorylinefile");
		system("cp -f $IGALDIR/$directorylinefile \"$opt_d/$opt_dest.$directorylinefile\"");
	} else {
		print "Found $opt_dest.$directorylinefile file ... using it.\n";
	}

	$output = "";
	$directoryline = read_file_in_string("$opt_d/$opt_dest.$directorylinefile");
	foreach $directory (@directories) {
		$temp = $directoryline;
		$temp =~ s/#DIRECTORY#/$directory/g;
		$directoryURLencoded = URLencode($directory);
		$temp =~ s/#DIRECTORY-URLENCODED#/$directoryURLencoded/g;
		$output .= $temp;
	}
	$indexfile =~ s/<!--#DIRECTORYLINE#-->/$output/;
} else {
	$indexfile =~ s/<!--#DIRECTORIES-START#-->.*<!--#DIRECTORIES-END#-->/<!-- no directories -->/s;
}
$indexfile =~ s/<!--#IGAL-VERSION#-->/$VERSION/g;	#add version information

#generate the table rows
$indexfile_copy = $indexfile;
if ($opt_pagination && $nfiles > $opt_pagination) { # pagination necessary!
	$paginate = $opt_pagination;
} else { 			# no pagination necessary
	$paginate = $nfiles;
}

for ($page = 0; $page * $paginate < $nfiles; $page++) {
	$output = "";
	$indexfile = $indexfile_copy;

	$on_this_page = int (($page+1) * $paginate <= $nfiles) ? $paginate : ($nfiles - $page*$paginate); # number of pictures on page
	$rows = int $on_this_page/$opt_w;     # number of film rows
	$rem = $on_this_page % $opt_w;        # number of thumbnails on last (incomplete) row
#	print "rows=$rows - rem=$rem - on_this_page=$on_this_page\n";

	if ($rem > 0) { $rows++; }	# is there a last incomplete row? if yes, we need one more circle for this one
	for ($i = 1; $i <= $rows; $i++) {
		# 
		$columns = ($i == $rows && $rem > 0) ? $rem : $opt_w; # last row needs less columns

		$output .= "  <TABLE border=0 cellspacing=0 cellpadding=$opt_p>\n";
		$output .= "    <TR><TD class=\"tiled\" height=$opt_t colspan=" . ($columns + 2) . ">&nbsp;</TD></TR>\n" unless ($opt_r);
		$output .= "    <TR>\n      <TD class=\"thumb\">&nbsp;</TD>\n";
		for ($j = 1; $j <= $columns; $j++) {
			$fileindex = ($page * $paginate) + (($i-1)*$opt_w+$j-1);	# calculate which file is in use
#			print "i=$i - j=$j (columns=$columns)- fileindex=$fileindex\n";
			$output .=  "      <TD class=\"thumb\">\n      ";
			if ($opt_s) {
				$output .= "<A href=\"$opt_o" . URLencode($imgfiles[$fileindex]) . "\">";
			} else {
				$output .= "<A href=\"$opt_o$opt_dest" . URLencode($slides[$fileindex]) . "\">";
			}
			print ".";
			$altname = $captions[$fileindex];
			if (isVideo( $imgext[$fileindex] )) { 
				$thumbbasename = $imgfiles[$fileindex];
				$thumbbasename =~ s{^.*/|\.[^.]+$}{}g;
				$thumbname = $thumbbasename . ".png";
				$thumb = $opt_dest . $thumbprefix . $thumbname;
				$thumbEncoded = $opt_dest . URLencode($thumbprefix . $thumbname );
			} else {
				$thumb = $opt_dest . $thumbprefix . $imgfiles[$fileindex];
				$thumbEncoded = $opt_dest . URLencode($thumbprefix . $imgfiles[$fileindex]);
			}
			if ($HAVEIM) {
				$temp = `identify -ping -format \"\%wx\%h\" \"$opt_d/$thumb\"`;
				$temp =~ m/(\d+)x(\d+)/;  $x=$1;  $y=$2;
				$output .= "<IMG src=\"" . $thumbEncoded . "\" width=$x height=$y alt=\"$altname\" title=\"$altname\" border=0>";
			} else {
				$output .= "<IMG src=\"" . $thumb . "\" alt=\"$altname\" title=\"$altname\" border=0>";
			}
			$output .= "</A></TD>\n";
		}
		$output .= "        <TD class=\"thumb\">&nbsp;</TD>\n    </TR>\n";
		$output .= "    <TR><TD class=\"tiled\" height=$opt_t colspan=" . ($columns+2) . ">&nbsp;</TD></TR>\n" unless ($opt_r);
		if (($opt_a or $opt_ad or $opt_as) and $HAVEIM) {
			$output .= "    <TR>\n      <TD>&nbsp;</TD>\n";
			for ($j = 1; $j <= $columns; $j++) {
				$fileindex = ($page * $paginate) + (($i-1)*$opt_w+$j-1);	# calculate which file is in use
#				print $fileindex;
				$output .= "      <TD>";
				$printdim = "$isiz[$fileindex]" if $opt_as;
				$printdim = "$xdim[$fileindex]x$ydim[$fileindex]" if $opt_ad;
				$printdim = "$xdim[$fileindex]x$ydim[$fileindex] ($isiz[$fileindex])" if $opt_a;
				$output .= $printdim;
				$output .= "</TD>\n";
			}
			$output .= "    </TR>\n";
		}
	#	write image captions under images if option -u is given
		if ($opt_u) {
			$output .= "    <TR>\n      <TD>&nbsp;</TD>\n";
			for ($j = 1; $j <= $columns; $j++) {
				$fileindex = ($page * $paginate) + (($i-1)*$opt_w+$j-1);	# calculate which file is in use
#				print $fileindex;
				$output .= "      <TD>" . $captions[$fileindex] . "</TD>\n";
			}
			$output .= "    </TR>\n";
		}
		$output .= "  </TABLE>\n    <BR>\n";

	}

	# now replace placeholder in index-file with generated html code
	$indexfile =~ s/<!-- contents with thumbnails will be inserted here by igal -->/$output/;
	# insert pageination
	if ($opt_pagination && $nfiles > $opt_pagination) { # pagination necessary!
		$numberpages = ceil($nfiles / $opt_pagination);
		$nextpage = $page+1;
		$tmptext = "Page $nextpage of $numberpages";
		# forward navigation
		if (($page+1) * $paginate < $nfiles) {
			$nextpagename = "$nextpage$opt_i";
			$lastpage = $numberpages -1;
			$tmptext .= "<a href=\"$nextpagename\">&nbsp;&gt;&gt;</a>&nbsp;&nbsp;<a href=\"$lastpage$opt_i\">&gt;|</a>";
		}		
		# backward navigation
		if ($page > 0) {
			$prevpage = $page-1;
			$prevpagename = ($prevpage == 0) ? $opt_i : "$prevpage$opt_i";
			$tmptext = "<a href=\"$opt_i\">|&lt;&nbsp;&nbsp;</a><a href=\"$prevpagename\">&lt;&lt;</a> $tmptext";
		}
		$indexfile =~ s/<!--#IGAL-PAGINATION#-->/$tmptext/g;
	}
	$indexfile =~ s/<!-- \*{4}.*\*{4} -->//g;	#clean up
	$indexfile =~ s/<!--#.*#-->//g;			#clean up

	$index_filename = ($page == 0) ? $opt_i : "$page$opt_i";
	print "$index_filename ";
	open(IXW,">$opt_d/$index_filename") or die "Can't create main $index_filename file\n";
	print IXW $indexfile;
	close(IXW);
}

print " done!\n";

# if --www was invoked make all images world-readable at the END
if ($opt_www) {
	$dir = ($opt_d eq ".") ? $opt_dest : "$opt_d/$opt_dest";
	$dir =~ s/\ /\\ /g;	# escape blanks in directory/filenames for system call
	print "\nMaking all igal files world-readable for WWW publishing...\n";
	print "chmod a+r $dir$csstemplate\n";
	system("chmod a+r $dir$csstemplate");
	print "chmod a+r $dir*.html\n";
	system("chmod a+r $dir*.html");
	print "chmod a+r $dir$thumbprefix*.*\n";
	system("chmod a+r $dir$thumbprefix*.*");
	print "chmod a+r $dir$slideprefix*.*\n";
	system("chmod a+r $dir$slideprefix*.*");
	print "chmod a+r $dir.$itile\n" unless($opt_r);
	system("chmod a+r $dir.$itile") unless($opt_r);
	print "chmod a+r ";
	# imagefiles are in same directory, therefore $dir has to be set different
	$dir = ($opt_d eq ".") ? "" : "$opt_d/";
	foreach $file (@imgfiles) {
		print "$dir$file ";
		system("chmod a+r \"$dir$file\"");
	}
	print "\nDone!\n";
}

##############################################################################

# subroutine that checks if a certain program is in the user's path
# usage &exist("identify") --> 1 (or 0 if it doesn't exist)
sub exist {
    local($program) = @_;
    foreach $dir (split(/:/,$ENV{'PATH'})) {
		return 1 if (-f "$dir/$program");
    }
	return 0;
}

# subroutine to test if accepted video file
sub isVideo {
	local($string) = @_;
	if ($string =~ m/(mov|mp4|mkv)/i) {
		return 1;
	} else {
		return 0;
	}
}

sub isMac {
	return "$^O" eq "darwin";
}


# subroutine that reads a file in a string...
# called with $string = read_file_in_string("datei.txt");
sub read_file_in_string {
	local($filename) = @_;

	open(FILE,$filename) or die "Can't open file $filename [$!]\n";
	local $/; 
	$string = <FILE>;
	close(FILE);

	return $string;
}

# subroutine that URL encodes a string...
# called with $string = URLencode("text to encode");
sub URLencode {
	local($string) = @_;
	$string =~ s/([^a-zA-Z0-9\.\_])/sprintf "%%%02X",ord($1)/eg;

	return $string
}
