}
}
-wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b )
+wxImage wxImage::ConvertToMono( unsigned char r, unsigned char g, unsigned char b ) const
{
wxImage image;
#if wxUSE_GUI
#ifdef __WXGTK__
-wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue )
+wxBitmap wxImage::ConvertToMonoBitmap( unsigned char red, unsigned char green, unsigned char blue ) const
{
wxImage mono = this->ConvertToMono( red, green, blue );
wxBitmap bitmap( mono, 1 );