1 files changed, 9 insertions, 0 deletions
diff --git a/libs/canvas/canvas/types.h b/libs/canvas/canvas/types.h
index 37c0c213ea..de98ddb18f 100644
--- a/libs/canvas/canvas/types.h
+++ b/libs/canvas/canvas/types.h
@@ -25,6 +25,12 @@
 #include <stdint.h>
 #include <boost/optional.hpp>
 
+#include <cairomm/refptr.h>
+
+namespace Cairo {
+	struct Context;
+}
+
 namespace ArdourCanvas
 {
 
@@ -89,6 +95,9 @@ struct Rect
 	bool contains (Duple) const;
 	Rect fix () const;
 
+        Rect convert_to_device (Cairo::RefPtr<Cairo::Context>) const;
+        Rect convert_to_user (Cairo::RefPtr<Cairo::Context>) const;
+
 	Distance width () const {
 		return x1 - x0;
 	}