compilation fixes for wxUSE_IMAGE==0

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47324 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/gtk/bitmap.h

@@ -62,7 +62,9 @@ public:
     }
 #endif
     wxBitmap( const wxString &filename, wxBitmapType type = wxBITMAP_TYPE_XPM );
+#if wxUSE_IMAGE
     wxBitmap( const wxImage& image, int depth = -1 ) { (void)CreateFromImage(image, depth); }
+#endif // wxUSE_IMAGE
     virtual ~wxBitmap();
     bool Ok() const { return IsOk(); }
     bool IsOk() const;
@@ -73,7 +75,9 @@ public:
     int GetWidth() const;
     int GetDepth() const;
 
+#if wxUSE_IMAGE
     wxImage ConvertToImage() const;
+#endif // wxUSE_IMAGE
 
     // copies the contents and mask of the given (colour) icon to the bitmap
     virtual bool CopyFromIcon(const wxIcon& icon);
@@ -119,15 +123,19 @@ public:
     bool HasAlpha() const;
 
 protected:
+#if wxUSE_IMAGE
     bool CreateFromImage(const wxImage& image, int depth);
+#endif // wxUSE_IMAGE
 
     virtual wxObjectRefData* CreateRefData() const;
     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
 
 private:
+#if wxUSE_IMAGE
     // to be called from CreateFromImage only!
     bool CreateFromImageAsPixmap(const wxImage& image, int depth);
     bool CreateFromImageAsPixbuf(const wxImage& image);
+#endif // wxUSE_IMAGE
 
     enum Representation
     {