The Tor Browser / file revision

 To upgrade to a new revision of libjpeg-turbo, do the following:

 * Check out libjpeg-turbo from SVN:

     $ svn co https://libjpeg-turbo.svn.sourceforge.net/svnroot/libjpeg-turbo/trunk libjpeg-turbo

 * In a clean clone of mozilla-central, run the following commands

     $ rm -rf media/libjpeg

     $ svn export --ignore-externals /path/to/libjpeg-turbo media/libjpeg

     $ cd media/libjpeg

 * Copy win/jsimdcfg.inc to simd/.

 * Since libjpeg-turbo normally creates config.h and jconfig.h at build time and

   we use pre-generated versions, changes to jconfig.h.in and win/config.h.in

   should be looked for and noted for later inclusion.

 * Now look through the new files and rm any which are npotb.  When I upgraded

   to libjpeg-turbo 1.1.0, the only files I kept which didn't match

     *.c  *.h *.asm *.inc

   were README and README-turbo.

   You can easily look for all non *.c, *.h, *.asm, and *.inc files by running

     $ hg status -nu | grep -v '\(c\|h\|asm\|inc\)$'

   Once you're comfortable that you're only deleting files you want to delete

   (and you've hg add'ed the files you want to keep), you can nuke the remaining

   files with

     $ hg status -nu | grep -v '\(c\|h\|asm\|inc\)$' | xargs rm

   A helpful command for finding the *.c files which aren't *currently* part of

   the build is

     diff <(ls *.c | sort) <(grep -o '\w*\.c' Makefile.in | sort)

   Of course, libjpeg-turbo might have added some new source files, so you'll

   have to look though and figure out which of these files to keep.

 * Restore files modified in the Mozilla repository.

     $ hg revert --no-backup config.h jconfig.h Makefile.in MOZCHANGES \

       mozilla.diff simd/Makefile.in genTables.py

 * Update config.h and jconfig.h as noted previously.

 * Apply Mozilla-specific changes to upstream files.

     $ patch -p0 -i mozilla.diff

 * Update Makefile.in to build any new files.

 * Finally, tell hg that we've added or removed some files:

     $ hg addremove

 == March 24, 2014 (libjpeg-turbo v1.3.1 r1205 2014-03-22) ==

 * Updated to v1.3.1 release.

 == November 25, 2013 ==

 * Fix bug 891693.

 == June 4, 2013 (libjpeg-turbo v1.3.0 r988 2013-05-25) ==

 * Updated to v1.3.0 release.

 == December 12, 2012 ==

 * Replace the runtime computed jpeg_nbits_table with constants in

   jpeg_nbits_table.h to make it shareable among processes. (bug 815473)

 == October 13, 2012 ==

 * Modified config.h to use MOZ_ALWAYS_INLINE (bug 800106).

 == July 4, 2012 (libjpeg-turbo v1.2.1 r853 2012-06-30) ==

 * Updated to v1.2.1 stable release.

 == June 5, 2012 (libjpeg-turbo v1.2.x branch, r831 2012-05-30) ==

 * Updated to latest version on v1.2.x branch (bug 759891).

 == February 10, 2012 (libjpeg-turbo v1.2.0 r807 2012-02-10) ==

 * Imported jchuff.c, jdhuff.c, jdhuff.h under new licensing.

 * Created mozilla.diff for the required jmorecfg.h changes and to allow for any

   future changes made by Mozilla to upstream files.

 * Removed the following files which are unused by the Mozilla build:

     cderror.h, cdjpeg.h, jconfig.h.in, transupp.h, simd/jsimdcfg.inc.h

 == March 28, 2011 (initial commit, libjpeg-turbo v1.1.0 r469 2011-02-27) ==

 * Modified jmorecfg.h to define UINT8, UINT16, INT16, and INT32 in terms of

   prtypes to fix a build error on Windows.

 * Defined INLINE as NS_ALWAYS_INLINE in jconfig.h.

 * Removed the following files which are licensed under the wxWindows license:

     bmp.c, bmp.h, jpegut.c, jpgtest.cxx, rrtimer.h, rrutil.h, turbojpeg.h,

     turbojpegl.c

 * Reverted the following files to what was previously in Mozilla's tree

   (nominally libjpeg 6.2):

     jchuff.c, jdhuff.c, jdhuff.h

   since the versions of these files in libjpeg-turbo are also under the

   wxWindows license.  (It would have been nicer to revert them to the new

   libjpeg-8b code, but that doesn't easily integrate with libjpeg-turbo.)