X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Flib%2Fposition.h;h=3c561d85c2b14b909b2f7e1fd2445bed662ff189;hb=504c63b3d62038bc486ca8a09e77fbb403907edd;hp=d68fcb1af9a02aa6cf1a3cb0e452e5718c7f4aa2;hpb=1dcfb3a26085ebb3703f40e2f51e43ce3d98be50;p=dcpomatic.git

diff --git a/src/lib/position.h b/src/lib/position.h
index d68fcb1af..3c561d85c 100644
--- a/src/lib/position.h
+++ b/src/lib/position.h
@@ -50,4 +50,25 @@ 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