--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/OpenGL/IOpenGLContext.h	Fri Apr 19 15:57:46 2019 +0200
@@ -0,0 +1,57 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2019 Osimis S.A., 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
+
+#if !defined(ORTHANC_ENABLE_OPENGL)
+#  error The macro ORTHANC_ENABLE_OPENGL must be defined
+#endif
+
+#if ORTHANC_ENABLE_OPENGL != 1
+#  error Support for OpenGL is disabled
+#endif
+
+
+#include <boost/noncopyable.hpp>
+
+
+namespace OrthancStone
+{
+  namespace OpenGL
+  {
+    class IOpenGLContext : public boost::noncopyable
+    {
+    public:
+      virtual ~IOpenGLContext()
+      {
+      }
+
+      virtual void MakeCurrent() = 0;
+
+      virtual void SwapBuffer() = 0;
+
+      virtual unsigned int GetCanvasWidth() = 0;
+
+      virtual unsigned int GetCanvasHeight() = 0;
+    };
+  }
+}
+