Supporters update.

[dcpomatic.git] / src / lib / rect.h

diff --git a/src/lib/rect.h b/src/lib/rect.h
index 602acfc4b8bb5cd6fb691c21861e5a19a54a2248..a01e0f8858ffba6d31eb6b9675d0cff571b4571d 100644 (file)
--- a/src/lib/rect.h
+++ b/src/lib/rect.h
@@ -1,34 +1,39 @@
 /*
-    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+    Copyright (C) 2013-2021 Carl Hetherington <cth@carlh.net>
 
-    This program is free software; you can redistribute it and/or modify
+    This file is part of DCP-o-matic.
+
+    DCP-o-matic is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
 
-    This program is distributed in the hope that it will be useful,
+    DCP-o-matic is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+    along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
 
 */
 
+
 #ifndef DCPOMATIC_RECT_H
 #define DCPOMATIC_RECT_H
 
+
 #include "position.h"
 #include <boost/optional.hpp>
 #include <algorithm>
 
+
 /* Put this inside a namespace as Apple put a Rect in the global namespace */
 
 namespace dcpomatic
 {
 
+
 /** @struct Rect
  *  @brief A rectangle.
  */
@@ -68,7 +73,7 @@ public:
                return Position<T> (x, y);
        }
 
-       boost::optional<Rect<T> > intersection (Rect<T> const & other) const
+       boost::optional<Rect<T>> intersection (Rect<T> const & other) const
        {
                /* This isn't exactly the paragon of mathematical precision */
 
@@ -82,7 +87,7 @@ public:
                        );
 
                if (r.width < 0 || r.height < 0) {
-                       return boost::optional<Rect<T> > ();
+                       return {};
                }
 
                return r;
@@ -90,10 +95,12 @@ public:
 
        void extend (Rect<T> const & other)
        {
+               T old_x = x;
+               T old_y = y;
                x = std::min (x, other.x);
                y = std::min (y, other.y);
-               width = std::max (x + width, other.x + other.width) - x;
-               height = std::max (y + height, other.y + other.height) - y;
+               width = std::max (old_x + width, other.x + other.width) - x;
+               height = std::max (old_y + height, other.y + other.height) - y;
        }
 
        Rect<T> extended (T amount) const {
@@ -111,6 +118,15 @@ public:
        }
 };
 
+
+template <class T>
+bool operator== (Rect<T> const& a, Rect<T> const& b)
+{
+       return a.x == b.x && a.y == b.y && a.width == b.width && a.height == b.height;
+}
+
+
 }
 
+
 #endif