--- Screen.pm	2007/08/05 19:44:20	161
+++ Screen.pm	2007/08/06 11:40:21	171
@@ -14,7 +14,7 @@
 use Data::Dump qw/dump/;
 
 use Exporter 'import';
-our @EXPORT = qw'$white $black';
+our @EXPORT = qw'$white $black @flip';
 
 use base qw(Class::Accessor Prefs);
 __PACKAGE__->mk_accessors(qw(app event));
@@ -245,6 +245,7 @@
 =cut
 
 my $pending_key;
+my $key_active;
 my $run_for = 2000;
 
 sub key_pressed {
@@ -262,9 +263,11 @@
 			if ( $state ) {
 				$pending_key = $key;
 				$self->key_down( $key );
+				$key_active->{$key} = 1;
 			} else {
 				undef $pending_key;
 				$self->key_up( $key );
+				$key_active->{$key} = 0;
 			}
 		}
 		return $pending_key;
@@ -286,12 +289,14 @@
 			warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
 			$pending_key = $k;
 			$self->key_down( $k );
+			$key_active->{$k} = 1;
 			$self->record_session('key_pressed', { $k => 1 });
 		}
 	} elsif ( $type == SDL_KEYUP ) {
 		my $up = $event->key_name();
 		warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
 		$self->key_up( $up );
+		$key_active->{$up} = 0;
 		$self->record_session('key_pressed', { $up => 0 });
 		undef $pending_key;
 	}
@@ -301,6 +306,28 @@
 	return $pending_key;
 }
 
+=head2 key_active
+
+Is key currently pressed on keyboard or in session?
+
+  $self->key_active( 'left shift', 'right shift', 'a' );
+
+=cut
+
+sub key_active {
+	my $self = shift;
+	my @keys = @_;
+	confess "Regexp is no longer supported" if ref($_[0]) eq 'Regexp';
+
+	my $active = 0;
+	foreach my $key ( @keys ) {
+		$active++ if $key_active->{$key};
+	}
+
+	warn "## key_active(",dump(@keys),") = $active\n" if $active;
+	return $active;
+}
+
 =head2 loop
 
 Implement CPU run for C<$run_run> cycles inside SDL event loop
@@ -326,6 +353,23 @@
 	}
 }
 
+# helper array to flip bytes for display
+our @flip;
+
+foreach my $i ( 0 .. 255 ) {
+	my $t = 0;
+	$i & 0b00000001 and $t = $t | 0b10000000;
+	$i & 0b00000010 and $t = $t | 0b01000000;
+	$i & 0b00000100 and $t = $t | 0b00100000;
+	$i & 0b00001000 and $t = $t | 0b00010000;
+	$i & 0b00010000 and $t = $t | 0b00001000;
+	$i & 0b00100000 and $t = $t | 0b00000100;
+	$i & 0b01000000 and $t = $t | 0b00000010;
+	$i & 0b10000000 and $t = $t | 0b00000001;
+	#warn "$i = $t\n";
+	$flip[$i] = $t;
+}
+
 =head1 SEE ALSO
 
 L<Orao> is sample implementation using this module