gecko-dev/media/libjpeg/MOZCHANGES

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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
* 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
== 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.)