X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Flib%2Fposition.h;h=3c561d85c2b14b909b2f7e1fd2445bed662ff189;hb=769c71b5c3e050ccfc1c13771d24328fbf76a495;hp=f904fe6616d7717d1f4983dbd77ef1148cc78c34;hpb=b655bd3359e9a014da68cd9f61e2a5b1d233247d;p=dcpomatic.git

diff --git a/src/lib/position.h b/src/lib/position.h
index f904fe661..3c561d85c 100644
--- a/src/lib/position.h
+++ b/src/lib/position.h
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2014 Carl Hetherington <cth@carlh.net>
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
@@ -17,11 +17,11 @@
 
 */
 
-#ifndef DVDOMATIC_POSITION_H
-#define DVDOMATIC_POSITION_H
+#ifndef DCPOMATIC_POSITION_H
+#define DCPOMATIC_POSITION_H
 
 /** @struct Position
- *  @brief A position.
+ *  @brief A position (x and y coordinates)
  */
 template <class T>
 class Position
@@ -43,4 +43,32 @@ public:
 	T y;
 };
 
+template<class T>
+Position<T>
+operator+ (Position<T> const & a, Position<T> const & b)
+{
+	return Position<T> (a.x + b.x, a.y + b.y);
+}
+
+template<class T>
+Position<T>
+operator- (Position<T> const & a, Position<T> const & b)
+{
+	return Position<T> (a.x - b.x, a.y - b.y);
+}
+
+template<class T>
+bool
+operator== (Position<T> const & a, Position<T> const & b)
+{
+	return a.x == b.x && a.y == b.y;
+}
+
+template<class T>
+bool
+operator!= (Position<T> const & a, Position<T> const & b)
+{
+	return a.x != b.x || a.y != b.y;
+}
+
 #endif