#!/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