use bool expression rather than implicit conversion

[wxWidgets.git] / include / wx / imagpng.h

diff --git a/include/wx/imagpng.h b/include/wx/imagpng.h
index 67aae57b63697111e9ccdd9003742b1211c8b3d9..27d0237be940047aa33d4afc22613a8b2ded5b0b 100644 (file)
--- a/include/wx/imagpng.h
+++ b/include/wx/imagpng.h
@@ -22,6 +22,11 @@
 
 #define wxIMAGE_OPTION_PNG_FORMAT    wxT("PngFormat")
 #define wxIMAGE_OPTION_PNG_BITDEPTH  wxT("PngBitDepth")
+#define wxIMAGE_OPTION_PNG_FILTER    wxT("PngF")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_LEVEL       wxT("PngZL")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_MEM_LEVEL   wxT("PngZM")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_STRATEGY    wxT("PngZS")
+#define wxIMAGE_OPTION_PNG_COMPRESSION_BUFFER_SIZE wxT("PngZB")
 
 enum
 {