WXDLLIMPEXP_CORE CGDataConsumerRef wxMacCGDataConsumerCreateWithCFData( CFMutableDataRef data );
WXDLLIMPEXP_CORE CGDataProviderRef wxMacCGDataProviderCreateWithMemoryBuffer( const wxMemoryBuffer& buf );
-CGColorSpaceRef WXDLLIMPEXP_CORE wxMacGetGenericRGBColorSpace(void);
+WXDLLIMPEXP_CORE CGColorSpaceRef wxMacGetGenericRGBColorSpace(void);
+
+WXDLLIMPEXP_CORE double wxOSXGetMainScreenContentScaleFactor();
class wxWindowMac;
// to