--- a/Framework/Viewport/SdlViewport.h	Thu Jul 18 09:22:08 2019 +0200
+++ b/Framework/Viewport/SdlViewport.h	Thu Jul 18 09:41:10 2019 +0200
@@ -58,6 +58,9 @@
     }
 
     virtual SdlWindow& GetWindow() = 0;
+    
+    virtual void UpdateSize(unsigned int width,
+                            unsigned int height) = 0;
   };
 
   class SdlOpenGLViewport : public SdlViewport
@@ -88,6 +91,12 @@
     {
       return context_.GetWindow();
     }
+
+    virtual void UpdateSize(unsigned int width,
+                            unsigned int height)
+    {
+      // nothing to do in OpenGL, the OpenGLCompositor::UpdateSize will be called automatically
+    }
   };
 
 
@@ -124,5 +133,11 @@
 
     virtual void Refresh();
 
+    virtual void UpdateSize(unsigned int width,
+                            unsigned int height);
+
+  private:
+    void UpdateSdlSurfaceSize(unsigned int width,
+                              unsigned int height);
   };
 }