From bfa0d113c413c2431f72405623d79cbc7b0b40f2 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Sun, 23 Dec 2012 22:50:57 +0100
Subject: [PATCH] Gallery2: Generator

---
 gal2/FORMAT         |  25 +++++++++
 gal2/UCW/Gallery.pm |  20 +++++++
 gal2/gal-gen        | 128 ++++++++++++++++++++++++++++++++++++++++++++
 gal2/gal-scan       |   2 +-
 4 files changed, 174 insertions(+), 1 deletion(-)
 create mode 100644 gal2/FORMAT
 create mode 100755 gal2/gal-gen

diff --git a/gal2/FORMAT b/gal2/FORMAT
new file mode 100644
index 0000000..b7a67fd
--- /dev/null
+++ b/gal2/FORMAT
@@ -0,0 +1,25 @@
+List of photos (gallery.list)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+One photo per line, tab-separated columns:
+
+	File name (relative to OrigDir in config)
+	Identifier (16 hex digits)
+	Orientation: one of "l", "r", "d", "."
+	Transformation -- sequence of:
+		n	normalize contrast
+		s	sharpen
+		h	equalize histogram
+	Title (UTF-8 string)
+
+Lines starting with "#" are ignored.
+
+
+Photo meta-data (gallery.meta in PhotoDir)
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Perl Storable containing a single hash.
+
+$meta->{photo}->{$identifier} is a hash of:
+	o		orientation
+	xf		transformation applied
+	w		width after scaling
+	h		height after scaling
diff --git a/gal2/UCW/Gallery.pm b/gal2/UCW/Gallery.pm
index b2d41a6..f13889d 100644
--- a/gal2/UCW/Gallery.pm
+++ b/gal2/UCW/Gallery.pm
@@ -6,6 +6,8 @@ package UCW::Gallery;
 use strict;
 use warnings;
 
+use Storable;
+
 BEGIN {
 	# Standard Perl module stuff
 	use Exporter();
@@ -39,6 +41,8 @@ BEGIN {
 	$CF{'OrigDir'} = '.';
 	$CF{'PhotoDir'} = 'photo';
 	$CF{'CacheDir'} = "cache",
+	$CF{'PhotoMaxWidth'} = 1024,
+	$CF{'PhotoMaxHeight'} = 1024,
 }
 
 sub LoadConfig() {
@@ -99,4 +103,20 @@ sub ReadList($) {
 	return \@images;
 }
 
+sub WriteMeta($$) {
+	my ($file, $meta) = @_;
+	open META, '>', "$file.new" or die "Cannot create $file.new: $!\n";
+	Storable::nstore_fd($meta, \*META);
+	close META;
+	rename "$file.new", $file or die "Cannot rename $file.new to $file: $!\n";
+}
+
+sub ReadMeta($) {
+	my ($file) = @_;
+	open META, '<', $file or die "Cannot read $file: $!\n";
+	my $meta = Storable::fd_retrieve(\*META) or die "Cannot parse $file\n";
+	close META;
+	return $meta;
+}
+
 1;
diff --git a/gal2/gal-gen b/gal2/gal-gen
new file mode 100755
index 0000000..970e3d2
--- /dev/null
+++ b/gal2/gal-gen
@@ -0,0 +1,128 @@
+#!/usr/bin/perl
+# UCW Gallery: Generate published photos
+# (c) 2004--2012 Martin Mares <mj@ucw.cz>
+
+use strict;
+use warnings;
+
+use lib '/home/mj/web/gal2';
+use UCW::Gallery;
+
+use File::Spec;
+use Image::Magick;
+use IO::Handle;
+use File::Spec;
+use File::Path;
+
+STDOUT->autoflush(1);
+
+UCW::Gallery::LoadConfig;
+
+my $orig_dir = $UCW::Gallery::CF{'OrigDir'};
+my $orig_list = UCW::Gallery::ReadList('gallery.list') or die "Cannot read gallery.list: $!\n";
+
+my $photo_dir = $UCW::Gallery::CF{'PhotoDir'};
+if (-d $photo_dir) {
+	print "Using existing output directory $photo_dir\n";
+} else {
+	print "Creating output directory $photo_dir\n";
+	File::Path::mkpath($photo_dir) or die "Unable to create $photo_dir: $!\n";
+}
+
+my $photo_meta = $photo_dir . "/gallery.meta";
+my $old_meta = {};
+if (-f $photo_meta) {
+	print "Reading old meta-data\n";
+	$old_meta = UCW::Gallery::ReadMeta($photo_meta);
+	# use Data::Dumper; print "Read old meta: ", Dumper($old_meta), "\n";
+}
+my $meta = { 'photo' => {} };
+
+for my $f (@$orig_list) {
+	my $id = $f->{id};
+	my $rotate = $f->{orientation};
+	my $xfrm = $f->{xfrm};
+	print "$id: ";
+
+	my $p = new Image::Magick;
+	my $orig = File::Spec->rel2abs($f->{file}, $UCW::Gallery::CF{'OrigDir'});
+	my ($orig_w, $orig_h, $orig_size, $orig_format) = $p->PingImage($orig) or die "Error reading $orig\n";
+	print "${orig_w}x${orig_h} ";
+
+	my ($w0, $h0) = ($rotate eq "l" || $rotate eq "r") ? ($orig_h, $orig_w) : ($orig_w, $orig_h);
+	my ($w, $h) = ($w0, $h0);
+	if ($w > $UCW::Gallery::CF{'PhotoMaxWidth'}) {
+		my $s = $UCW::Gallery::CF{'PhotoMaxWidth'} / $w;
+		$w = $w * $s;
+		$h = $h * $s;
+	}
+	if ($h > $UCW::Gallery::CF{'PhotoMaxHeight'}) {
+		my $s = $UCW::Gallery::CF{'PhotoMaxHeight'} / $h;
+		$w = $w * $s;
+		$h = $h * $s;
+	}
+	$w = int($w);
+	$h = int($h);
+	
+	my $m = {
+		'o' => $rotate,
+		'xf' => $xfrm,
+		'w' => $w,
+		'h' => $h,
+	};
+
+	my $om = $old_meta->{photo}->{$id};
+	if ($om &&
+	    $om->{o} eq $m->{o} &&
+	    $om->{xf} eq $m->{xf} &&
+	    $om->{w} eq $m->{w} &&
+	    $om->{h} eq $m->{h}) {
+		# FIXME: Remove old images?
+		print "... uptodate\n";
+		$meta->{photo}->{$id} = $om;
+		next;
+	}
+
+	my $e;
+	$e = $p->Read($orig) and die "Error reading $orig: $e";
+	$p->Strip;
+	$p->SetAttribute(quality=>90);
+
+	if ($xfrm =~ /s/) {
+		print "-> sharpen ";
+		$p->Sharpen(1);
+	}
+	if ($xfrm =~ /h/) {
+		print "-> equalize ";
+		$p->Equalize();
+	}
+	if ($xfrm =~ /n/) {
+		print "-> normalize ";
+		$p->Normalize();
+	}
+
+	my $rot = 0;
+	if ($rotate eq "l") { $rot = 270; }
+	elsif ($rotate eq "r") { $rot = 90; }
+	elsif ($rotate eq "u") { $rot = 180; }
+	if ($rot) {
+		print "-> rotate $rot ";
+		$p->Rotate(degrees=>$rot);
+	}
+
+	if ($w != $w0 || $h != $h0) {
+		print "-> ${w}x${h} ";
+		$p->Resize(width=>$w, height=>$h);
+	}
+
+	my $photo = File::Spec->catfile($photo_dir, $id . ".jpg");
+	my $tmp = "$photo.new";
+	$e = $p->Write($tmp) and die "Unable to write $tmp: $e";
+	rename $tmp, $photo or die "Cannot rename $tmp to $photo: $!\n";
+
+	print "... OK\n";
+	$meta->{photo}->{$id} = $m;
+}
+
+print "Writing meta-data\n";
+UCW::Gallery::WriteMeta($photo_meta, $meta);
diff --git a/gal2/gal-scan b/gal2/gal-scan
index 951a93c..39dd6b0 100755
--- a/gal2/gal-scan
+++ b/gal2/gal-scan
@@ -29,7 +29,7 @@ if (@ARGV) {
 			my @p = ();
 			while (my $e = readdir D) {
 				my $f = File::Spec->canonpath(File::Spec->catfile($in, $e));
-				if ($f =~ m{\.jpe?g$}i) {
+				if ($f =~ m{\.(jpe?g|png)$}i) {
 					push @p, $f;
 				}
 			}
-- 
2.39.2