+#ifndef _WX_DCMEMORY_H_BASE_
+#define _WX_DCMEMORY_H_BASE_
+
+#include "wx/bitmap.h"
+
+// NOTE: different native implementations of wxMemoryDC will derive from
+// different wxDC classes (wxPaintDC, wxWindowDC, etc), so that
+// we cannot derive wxMemoryDCBase from wxDC and then use it as the
+// only base class for native impl of wxMemoryDC...
+class WXDLLEXPORT wxMemoryDCBase
+{
+public:
+ wxMemoryDCBase() { }
+
+ // avoid warnings about having virtual functions but non virtual dtor
+ virtual ~wxMemoryDCBase() { }
+
+ // select the given bitmap to draw on it
+ void SelectObject(wxBitmap& bmp)
+ {
+ // make sure that the given wxBitmap is not sharing its data with other
+ // wxBitmap instances as its contents will be modified by any drawing
+ // operation done on this DC
+ if (bmp.IsOk())
+ bmp.UnShare();
+
+ DoSelect(bmp);
+ }
+
+ // select the given bitmap for read-only
+ virtual void SelectObjectAsSource(const wxBitmap& bmp)
+ {
+ DoSelect(bmp);
+ }
+
+protected:
+ virtual void DoSelect(const wxBitmap& bmp) = 0;
+};
+
+#if defined(__WXPALMOS__)
+#include "wx/palmos/dcmemory.h"
+#elif defined(__WXMSW__)