--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Widgets/CairoWidget.cpp	Fri Oct 14 15:34:11 2016 +0200
@@ -0,0 +1,105 @@
+/**
+ * Stone of Orthanc
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ *
+ * This program 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 3 of the
+ * License, or (at your option) any later version.
+ *
+ * In addition, as a special exception, the copyright holders of this
+ * program give permission to link the code of its release with the
+ * OpenSSL project's "OpenSSL" library (or with modified versions of it
+ * that use the same license as the "OpenSSL" library), and distribute
+ * the linked executables. You must obey the GNU General Public License
+ * in all respects for all of the code used other than "OpenSSL". If you
+ * modify file(s) with this exception, you may extend this exception to
+ * your version of the file(s), but you are not obligated to do so. If
+ * you do not wish to do so, delete this exception statement from your
+ * version. If you delete this exception statement from all source files
+ * in the program, then also delete it here.
+ * 
+ * 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "CairoWidget.h"
+
+#include "../Orthanc/Core/Images/ImageProcessing.h"
+#include "../Orthanc/Core/OrthancException.h"
+
+namespace OrthancStone
+{
+  static bool IsAligned(const Orthanc::ImageAccessor& target)
+  {
+    // TODO
+    return true;
+  }
+
+
+  void CairoWidget::SetSize(unsigned int width,
+                            unsigned int height)
+  {
+    surface_.SetSize(width, height);
+  }
+  
+
+  bool CairoWidget::Render(Orthanc::ImageAccessor& target)
+  {
+    // Don't call the base class here, as
+    // "ClearBackgroundCairo()" is a faster alternative
+
+    if (IsAligned(target))
+    {
+      CairoSurface surface(target);
+      CairoContext context(surface);
+      ClearBackgroundCairo(context);
+      return RenderCairo(context);
+    }
+    else
+    {
+      CairoContext context(surface_);
+      ClearBackgroundCairo(context);
+
+      if (RenderCairo(context))
+      {
+        Orthanc::ImageProcessing::Copy(target, surface_.GetAccessor());
+        return true;
+      }
+      else
+      {
+        return false;
+      }
+    }
+  }
+
+
+  void CairoWidget::RenderMouseOver(Orthanc::ImageAccessor& target,
+                                    int x,
+                                    int y)
+  {
+    if (IsAligned(target))
+    {
+      CairoSurface surface(target);
+      CairoContext context(surface);
+      RenderMouseOverCairo(context, x, y);
+    }
+    else
+    {
+      Orthanc::ImageAccessor accessor = surface_.GetAccessor();
+      Orthanc::ImageProcessing::Copy(accessor, target);
+
+      CairoContext context(surface_);
+      RenderMouseOverCairo(context, x, y);
+
+      Orthanc::ImageProcessing::Copy(target, accessor);
+    }
+  }
+}