- wxZLIB_NO_HEADER = 1, // raw deflate stream, no header or checksum
- wxZLIB_ZLIB = 2, // zlib header and checksum
- wxZLIB_GZIP = 3 // gzip header and checksum, requires zlib 1.2+
+#if WXWIN_COMPATIBILITY_2_4
+ wxZLIB_24COMPATIBLE = 4, // read v2.4.x data without error
+#endif
+ wxZLIB_NO_HEADER = 0, // raw deflate stream, no header or checksum
+ wxZLIB_ZLIB = 1, // zlib header and checksum
+ wxZLIB_GZIP = 2, // gzip header and checksum, requires zlib 1.2.1+
+ wxZLIB_AUTO = 3 // autodetect header zlib or gzip