Implement GradientFillLinear and GradientFillConcentric for wxSVGFileDC

include/wx/dcsvg.h

@@ -220,6 +220,16 @@ private:
         return false;
     }
 
+    virtual void DoGradientFillLinear(const wxRect& rect,
+                                      const wxColour& initialColour,
+                                      const wxColour& destColour,
+                                      wxDirection nDirection = wxEAST) wxOVERRIDE;
+
+    virtual void DoGradientFillConcentric(const wxRect& rect,
+                                        const wxColour& initialColour,
+                                        const wxColour& destColour,
+                                        const wxPoint& circleCenter) wxOVERRIDE;
+
     virtual void DoGetSize(int * x, int *y) const wxOVERRIDE
     {
         if ( x )
@@ -276,6 +286,9 @@ private:
     // incremented in each SetClippingRegion() call.
     size_t m_clipUniqueId;
 
+    // Unique ID for every gradient.
+    size_t m_gradientUniqueId;
+
     wxDECLARE_ABSTRACT_CLASS(wxSVGFileDCImpl);
     wxDECLARE_NO_COPY_CLASS(wxSVGFileDCImpl);
 };