--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/falsecolor_test.pl	Sun Jun 26 21:32:00 2011 +0100
@@ -0,0 +1,67 @@
+#!/usr/bin/perl
+
+use strict;
+use warnings;
+
+my $script = "falsecolor";
+my $csh = "../orig/falsecolor.csh";
+my $perl = "../bin/falsecolor.perl";
+print "script: $script\n";
+
+use File::Temp qw/ tempdir /;
+my $tmpdir = tempdir( CLEANUP => 0 );
+print "temp dir: $tmpdir\n";
+
+my $img = "data/images/street-rgbe_rle_400x400.hdr";
+
+my @options = (
+		"-ip $img",
+		"-ip $img -l cd/m2",   # Label now defaults to cd/m2, not nits.
+		"-i $img -p $img -l cd/m2",
+		"-ip $img -cl -l cd/m2",
+		"-ip $img -n 10 -l cd/m2",
+		"-ip $img -s 2000 -l cd/m2",
+		"-ip $img -lw 200 -lh 300 -l cd/m2",   # scale is slightly higher now.
+);
+
+# Run old CSH and new Perl script with different options,
+# compare the resulting images.
+my $index = 0;
+my $opt;
+foreach $opt (@options) {
+		my $cshout = "$tmpdir/${script}_csh$index.hdr";
+		my $cshcmd = "$script.csh $opt > $cshout";
+		print "  $cshcmd\n";
+		system "csh ../orig/$cshcmd";
+
+		my $perlout = "$tmpdir/${script}_perl$index.hdr";
+		my $perlcmd = "$script.pl $opt > $perlout";
+		print "  $perlcmd\n";
+		system "perl ../bin/$perlcmd";
+
+		my $diffimg = "$tmpdir/${script}_diff$index.hdr";
+		my $uval = &compare_images("$cshout", "$perlout", "$diffimg");
+		if( $uval > 0 ) {
+			print "      Error: Diff image $diffimg contains $uval unique values (should be one).\n";
+			system "ximage $diffimg";
+		} else {
+			print "      Ok: Images $cshout and $perlout are identical.\n";
+		}
+}
+print "temp dir $tmpdir not removed. Please remove manually.\n";
+
+sub compare_images() {
+	my $in1 = shift;
+	my $in2 = shift;
+	my $out = shift;
+
+	my $cmd = "pcomb $in1 -s -1 $in2 > $out";
+	print "    $cmd\n";
+	system "$cmd";
+	my $unique = `pvalue -h -H -d -u $out`;
+	my $unique_cnt = scalar( split( '\n', $unique ) );
+
+	return $unique_cnt;
+}
+
+#EOF