--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/Viewport/WebAssemblyCairoViewport.h	Mon Dec 09 17:46:33 2019 +0100
@@ -0,0 +1,50 @@
+/**
+ * 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
+
+#include "WebAssemblyViewport.h"
+
+namespace OrthancStone
+{
+  class WebAssemblyCairoViewport : public WebAssemblyViewport
+  {
+  private:
+    std::auto_ptr<Orthanc::ImageAccessor>  javascript_;
+        
+    void GetCanvasSize(unsigned int& width,
+                       unsigned int& height);
+
+  protected:
+    virtual void Paint(ICompositor& compositor,
+                       ViewportController& controller) ORTHANC_OVERRIDE;
+    
+    virtual void UpdateSize(ICompositor& compositor) ORTHANC_OVERRIDE;
+
+  public:
+    WebAssemblyCairoViewport(const std::string& canvasId);
+
+    virtual ~WebAssemblyCairoViewport()
+    {
+      ClearCompositor();
+    }
+  };
+}