Add wx headers and ext

wxheaders/wx/msw/wrapgdip.h

@@ -0,0 +1,41 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/wrapgdip.h
+// Purpose:     wrapper around <gdiplus.h> header
+// Author:      Vadim Zeitlin
+// Created:     2007-03-15
+// Copyright:   (c) 2007 Vadim Zeitlin <vadim@wxwidgets.org>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_WRAPGDIP_H_
+#define _WX_MSW_WRAPGDIP_H_
+
+#include "wx/msw/wrapwin.h"
+
+// min and max must be available for gdiplus.h but we cannot define them as
+// macros because they conflict with std::numeric_limits<T>::min and max when
+// compiling with mingw-w64 and -std=c++17. This happens because with c++17,
+// math.h includes bessel_function which requires std::numeric_limits.
+
+#include <cmath>
+using std::min;
+using std::max;
+
+// There are many clashes between the names of the member fields and parameters
+// in the standard gdiplus.h header and each of them results in C4458 with
+// VC14, so disable this warning for this file as there is no other way to
+// avoid it.
+#ifdef __VISUALC__
+    #pragma warning(push)
+    #pragma warning(disable:4458) // declaration of 'xxx' hides class member
+#endif
+
+#include <gdiplus.h>
+using namespace Gdiplus;
+
+#ifdef __VISUALC__
+    #pragma warning(pop)
+#endif
+
+#endif // _WX_MSW_WRAPGDIP_H_
+