+wxIMAGE_OPTION_PNG_FORMAT = wx._core.IMAGE_OPTION_PNG_FORMAT
+wxIMAGE_OPTION_PNG_BITDEPTH = wx._core.IMAGE_OPTION_PNG_BITDEPTH
+wxPNG_TYPE_COLOUR = wx._core.PNG_TYPE_COLOUR
+wxPNG_TYPE_GREY = wx._core.PNG_TYPE_GREY
+wxPNG_TYPE_GREY_RED = wx._core.PNG_TYPE_GREY_RED