--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Toolbox/Extent.h	Tue May 30 14:09:11 2017 +0200
@@ -0,0 +1,83 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017 Osimis, Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#pragma once
+
+namespace OrthancStone
+{
+  class Extent
+  {
+  private:
+    bool    empty_;
+    double  x1_;
+    double  y1_;
+    double  x2_;
+    double  y2_;
+
+  public:
+    Extent()
+    {
+      Reset();
+    }
+
+    void Reset();
+
+    void AddPoint(double x,
+                  double y);
+
+    void Union(const Extent& other);
+
+    bool IsEmpty() const
+    {
+      return empty_;
+    }
+
+    double GetX1() const
+    {
+      return x1_;
+    }
+
+    double GetY1() const
+    {
+      return y1_;
+    }
+
+    double GetX2() const
+    {
+      return x2_;
+    }
+
+    double GetY2() const
+    {
+      return y2_;
+    }
+
+    double GetWidth() const
+    {
+      return x2_ - x1_;
+    }
+
+    double GetHeight() const
+    {
+      return y2_ - y1_;
+    }
+  };
+}