#!/usr/bin/perl
 
my $dest_size = '1024'; # Destination max size
my $watermark_text = "some nifty watermarktext";
my $identify_bin = '/usr/bin/identify';
my $convert_bin = '/usr/bin/convert';
my $composite_bin = '/usr/bin/composite';
 
my %imageinfo = ();
my $cmd = "";
 
$cmd = "$identify_bin -format \"\%f: \%wx\%h\\n\" ./*.jpg";
 
printf "\n*** Process started ***\n";
printf "\tGetting filenames and geometry of all jpg (*.jpg) in current dir (may take some time) .....";
 
open (IM_IDENTIFY, "$cmd|");
while (<IM_IDENTIFY>){
  chomp $_;
  if ($_ ne "") {
    $_ =~ /(.+): (.+)x(.+)/;
    $imageinfo{"$1"} = {
	"w" => $2,
	"h" => $3}
  }
}
close (IM_IDENTIFY);
print " done.\n";
 
printf "\tCreating 'web' directory (if it doesn't exist)...";
unless(-d "web"){
    mkdir "web" or die "Could not create 'web' directory: $!";
}
print " done.\n";
 
printf "\tCreating watermark image...";
$cmd = "$convert_bin " .
	"-size 370x65 " .
	"xc:transparent ".
	"-font Bookman-DemiItalic ".
	"-pointsize 34 ".
	"-draw \"text 25,60 \'$watermark_text\'\" ".
	"-channel RGBA ".
	"-gaussian 0x3 ".
	"-fill darkred ".
	"-stroke black ".
	"-draw \"text 20,55 \'$watermark_text\'\" ".
	"web/watermark.png";
system($cmd) == 0 or die "Could not create watermark image: $!\n";
print " done.\n";
 
printf "\tResizing images \n";
while (($key,$value) = each %imageinfo) {
	print "\t\t$key: ";
 
	$arg = 'x';
	$arg = '' if($imageinfo{$key}{'w'} > $imageinfo{$key}{'h'});
	print "...";
	$cmd = "$convert_bin -resize $arg$dest_size $key web/$key";
	system ($cmd) == 0 or die "Could not resize Image: $!\n";
	print " watermarking ....";
	$cmd = "$composite_bin -gravity SouthEast web/watermark.png web/$key web/$key";
	system ($cmd) == 0 or die "Could not apply watermark with '$cmd': $!\n";
	print " done!\n";
}
 
printf "\tCleaning up...\n";
printf "\t\tRemoving watermark image...";
	unlink("web/watermark.png") or die "Couldn't unlink web/watermark.png: $!";
	printf "done!\n";
print "\n*** Process finished ***\n";