#include "wx/image.h"
 #include "wx/dcmemory.h"
 #include "wx/app.h"
+#include "wx/rawbmp.h"
 
 #ifdef __WXGTK20__
     // need this to get gdk_image_new_bitmap()
 {
 }
 
+
+bool wxBitmap::HasAlpha() const 
+{
+#ifdef __WXGTK20__
+    return HasPixbuf();
+#else
+    return false;
+#endif
+}
+
+void wxBitmap::UseAlpha()
+{ 
+#ifdef __WXGTK20__
+    GetPixbuf();
+#endif
+}
+
 //-----------------------------------------------------------------------------
 // wxBitmapHandler
 //-----------------------------------------------------------------------------