--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Viewport/CairoContext.cpp	Fri Oct 14 15:34:11 2016 +0200
@@ -0,0 +1,70 @@
+/**
+ * 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 "CairoContext.h"
+
+#include "../Orthanc/Core/Logging.h"
+#include "../Orthanc/Core/OrthancException.h"
+
+namespace OrthancStone
+{
+  CairoContext::CairoContext(CairoSurface& surface)
+  {
+    context_ = cairo_create(surface.GetObject());
+    if (!context_)
+    {
+      LOG(ERROR) << "Cannot create Cairo drawing context";
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError);
+    }
+  }
+
+
+  CairoContext::~CairoContext()
+  {
+    if (context_ != NULL)
+    {
+      cairo_destroy(context_);
+      context_ = NULL;
+    }
+  }
+
+
+  void CairoContext::SetSourceColor(uint8_t red,
+                                    uint8_t green,
+                                    uint8_t blue)
+  {
+    cairo_set_source_rgb(context_,
+                         static_cast<float>(red) / 255.0f,
+                         static_cast<float>(green) / 255.0f,
+                         static_cast<float>(blue) / 255.0f);
+  }
+}