Merge compression updates

[wimlib] / NEWS

diff --git a/NEWS b/NEWS
index 82aef67738ef9a5dcdc7951f3f2211aa82ea0491..921e1662fd72d16c462d8a9b682912915ef75a2a 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,19 +1,51 @@
 Version 1.7.1-BETA:
+       Made more improvements to the compression algorithms.
+
+       The default compression mode for wimcapture is now LZX compression in
+       its default mode, which is the the same as '--compress=maximum'.
+
+       You can now specify an optional integer compression level to the
+       '--compress' or '--solid-compress' options; e.g.  '--compress=lzx:75'.
+       Currently, the default level in all cases is 50.  This capability
+       deprecates the '--compress-slow' (or '--recompress-slow') option to
+       several wimlib-imagex commands.
+
+       The '--pack-streams', '--pack-compress', and '--pack-chunk-size' options
+       to several wimlib-imagex commands have been deprecated in favor of more
+       "standard" names: '--solid', '--solid-compress', and
+       '--solid-chunk-size', respectively.
+
+       The XPRESS compressor no longer supports chunks larger than 65536 bytes.
+       There is little point in having larger chunks, since the LZ77 sliding
+       window for XPRESS cannot be larger than 65536 bytes.  This change does
+       not affect the default XPRESS chunk size, which is 32768.
+
        The new (as of v1.7.0) extraction code will no longer run out of file
        handles when extracting many (1000+) identical files.
 
-       Library users can now initialize and de-initialize the library multiple
-       times in one run of an application program.
+       Library changes:
+
+               Custom compressor parameters have been removed from the library
+               in favor of the simpler level-based API.
+
+               Decompressor parameters have been removed entirely.
+
+               The maximum XPRESS chunk size has been reduced, as mentioned
+               above.
+
+               Library users can now initialize and de-initialize the library
+               multiple times in one run of an application program.
 
-       Library users will now receive WIMLIB_PROGRESS_MSG_WRITE_STREAMS and
-       WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS messages more frequently when
-       writing or extracting large WIM files.
+               Library users will now receive WIMLIB_PROGRESS_MSG_WRITE_STREAMS
+               and WIMLIB_PROGRESS_MSG_EXTRACT_STREAMS messages more frequently
+               when writing or extracting large WIM files.
 
-       Added experimental new write flag:
-       WIMLIB_WRITE_FLAG_SEND_DONE_WITH_FILE_MESSAGES.
+               Added experimental new write flag:
+               WIMLIB_WRITE_FLAG_SEND_DONE_WITH_FILE_MESSAGES.
 
-       Library users can now specify a custom file for warning and error
-       messages to be sent to, rather than the default of standard error.
+               Library users can now specify a custom file for warning and
+               error messages to be sent to, rather than the default of
+               standard error.
 
 Version 1.7.0:
        Improved compression, decompression, and extraction performance.