path: root/doc/HISTORY

Jef Poskanzer (jef@acme.com) invented the PBM format in the 1980s to
provide the computer graphics world with a common, trouble-free
format, a lingua-franca, for bitmaps.  The format was designed to be
simple enough that it could transmitted within an email message
without any special encapsulating and survive any translations and
recoding that an email message might go through and be easily
extractable on the other end.

In 1988, Jef distributed the forerunner of Netpbm, Pbmplus, which
gathered together the various tools he had developed to work with PBM
files.  These were mainly tools to convert between PBM and other
existing graphics formats, making it possible to deal with the Tower
Of Babel situation that had arisen with the proliferation of graphics
formats.

By the end of 1988, Jef had added the PGM and PPM formats and lots more
tools to Pbmplus.

In 1991, Jef added a variety of programs and code contributed by the
user community, and then stopped maintaining Pbmplus.  Jef never
formally renounced support for it, but simply didn't get around to
distributing any updates for over a year following his final December
10, 1991 release.

In 1993, Netpbm was developed to replace Pbmplus.  Netpbm was nothing
more than a new release of Pbmplus, and named for the fact that people
all over the world would maintain the package by submitting fixes and
enhancements over the Net.  This was a time when such worldwide
collaboration was still novel.

Then Netpbm apparently fell into neglect with the last release by its
regular maintainer in March 1994.  In September of 1995 Anthony
Thyssen released an unofficial update of it called Netpbm-1mar1994.p1,
while disclaiming any responsibity for ongoing upkeep.

The documentation in that 1995 release mentioned two different official
mailing lists concerning the package, but by April 1999, neither
existed anymore.

In September 1999, Bryan Henderson needed some minor bugs fixed, and
wanted to clean up the mess of unsupported versions and outdated
documentation of these tools.  After checking around to see if anyone
had any claims of ownership of the package, and finding none, Bryan
assumed control and responsibility for Netpbm.  

In November 1999, Thorbjoern Ravn Anderson <ravn@mip.sdu.dk> did the
same thing, for the same reason (apparently unaware of Bryan's work)
and made available an updated version (based on the 1994 release) as
described by http://sunsite.auc.dk/netpbm.  Shortly thereafter, he
discontinued his effort in deference to the new Pbmplus effort
mentioned below.  Bryan did not know about Anderson's work until March
2000.

In August 2000, the PAM format appeared.  But it took a long time
after that for there to be enough programs and library routines to
make it useful.  It still is barely known and used; PAM is more of a
direction or philosophy than a practical tool.  Along with PAM came a
whole new suite of library routines for processing both classic PNM
and PAM format images.  The new "pam" routines are easier to use.

In parallel, and unknown to Bryan, Jef was working on a new release
under the original name Pbmplus and claiming again (or maybe still) to
be maintaining Pbmplus.  He did a limited release of a beta version of
it in November 1999.  A mailing list pbmplus@acme.com was active.
Bryan learned of this effort's existence in March 2000.  No widespread
distribution ever resulted from this.

Pbmplus and Netpbm were once part of the body of X/Windows contributed
software, distributed on ftp.x.org (directory contrib/utilities).
Bryan didn't receive a response to an inquiry to the ftp.x.org owner
as to the prospect of cleaning up the Netpbm related files there.  So
Bryan instead made Metalab the new home of the source code.  But
Metalab had pretty low quality too, and in April 2000 Bryan moved the
package's home to Sourceforge.

In June 2002, Bryan reorganized the package.  Before, it was organized to
reflect the evolution of the package:  first PBM only, then PGM was added,
then PPM, and then the multi-format PNM programs.  There were four separate
subroutine libraries and each of the PBM, PGM, PPM, and PNM components was
independent of the components invented later.  Documentation was in the form
of traditional man pages.  In Release 10, the package was integrated into a
single monolithic package.  There was one subroutine library and the source
tree was divided according to program function rather than what generation
of Netpbm it related to.  All documentation was converted to HTML.

In January 2004, Netpbm started to get the linear/gamma-adjusted
sample value thing right.  Many programs had always used the gamma
adjusted values from Netpbm images as if they were linear, which
produced incorrect and rather terrible results.  Netpbm 10.20 brought
the pm_[un]gamma709() library routines and pnm_readpamrown() etc.  for
manipulating Netpbm images in floating point 0..1 sample values, both
linear and gamma-adjusted.


CHANGE HISTORY 
--------------

not yet  BJH  Release 10.36.0

              pm_accept_to_pamtuples: fix bug: fill in pam structure.
              Thanks "Christian Schlotter" <schlotter@users.sourceforge.net>.

              Fix selection of MMX_SEE fastpath based on GNU compiler version
              number.

              Eliminate pm_perror() in favor of informative error messages.

              libnetpbm: fix rgb:r/g/b color name parsing for invalid
              syntax.

06.08.19 BJH  Release 10.35.0

              Add pgmdeshadow.

              giftopnm: add -quitearly.

              pamfile: add -comments.

              ppmdraw: remove limitation on size of script.

              pnm_readpaminit(), pnm_writepaminit(): Add comment control.

              ppmtogif: do one row at a time.

              Pnmtopng: improve validation of -modtime option.

              Look in /usr/share/X11 instead of /usr/openwin/lib for
              rgb.txt.

              ppmtompeg: die properly when frame is less than 16x16.

              ppmdraw: fix bug with semicolon in script not followed by
              white space.

              libppmd (ppmdraw, ppmlabel): don't crash with horizontal
              or vertical line that is entirely out of frame.

              picttoppm: Fix 32 bit per pixel conversion, broken in 10.34.

              pamthreshold: fix read from pipe.

              Fix typo in make file that makes svgtopam get built
              when Libxml2 is not available.

              pnm_computetuplefreqhash(), pnm_computetuplefreqtable2():
              Don't crash on error without pm_setjmp().

              Change memmem() to memmem_internal() in cameratopam/identify.c
              to avoid collision with system library.

              Use __MINGW32__ to determine HAVE_MKSTEMP (instead of manual).

              Eliminate use of network functions for endianness computations.

              Use "inttypes_netpbm.h" on a system that doesn't have
              the int_fast32_t, etc. types.  Like Solaris 8.

              configure, installnetpbm: autoflush stdout.

              Build: Use libpng-config if it exists.

              Build: assume no Lex program if neither 'flex' or 'lex' shell
              command verb exists.

              Remove test source file ppmdtexttest.  Ppmdraw should be
              sufficient now.
              
06.06.18 BJH  Release 10.34

              Add pamthreshold.  Thanks Erik Auerswald
              <auerswal@unix-ag.uni-kl.de>.

              Add pamx.

              Add pamtoxvmini.
              
              pammasksharpen: Add -threshold.

              pnmtopng: make "N colors found" message verbose-only.

              pnmtopng: make "no room in palette" message non-verbose.

              picttoppm: Tolerate various PICT file corruptions.

              picttoppm: Don't issue warning message when file named
              'fontdir' doesn't exist.

              libnetpbm: Add ppm_bk_color_from_color(),
              ppm_bk_color_from_name(), ppm_name_from_bk_color().
              Thanks "Kenan Kalajdzic" <kalajdzic@gmail.com>.

              libnetpbm: Add ppmd_fill_path().

              ppmtobmp: Fix for PBM input.

              bmptopnm: Don't crash on BMP with no color map.

              bmptopnm: Fix wrong file name in error messages.

              ppmtogif: fix bug: always produces garbage output.

              ppmtompeg: fix input from Standard Input.

              pnmflip: fix bug: -rotate90, -rotate180, and -rotate270
              (and synonyms) don't work when followed by other rotation
              options.

              ppmtoilbm: Fig bug: generates more planes than necessary.

              pamtofits: fix buffer overflow in asembling header.

              picttoppm: fix bug - interprets some images wrong because of
              bogus "rowBytes" value.

              Redo asprintfN(), etc. so as not to use va_list in a way
              that doesn't work on some machines.

              cameratopam: remove definition of memmem() so it doesn't collide
              with same in some C libraries.  Add memmemN() and MEMEQ to
              libnetpbm.

              Fix build of filename.o.

              Build: Use local version of mkstemp() based on mktemp() when
              mkstemp() isn't available.  No automatic determination that
              mkstemp() isn't available yet.

              Build: Include dummy pm_system() on a system that doesn't
              have regular Unix process management.

              Add -Wundef to Gcc compile options.

06.03.26 BJH  Release 10.33

              Add pamtosvg.

              g3topbm: Add -width, -paper_size.

              libnetpbm / most newer programs: Fix bug that produces
              plain format output when it should be raw because
              pnm_readpaminit() does not set 'plainformat' and most
              programs just copy the input pam to the output pam.

              pamflip: fix bug with left/right flip of PBM that has 
              width an even multiple of 8 plus something less than 8.

              pnmquant: turn on autoflush when creating seekable file.

              install: fix symbolic link pnmdepth -> pamdepth.
              
              build: fix some importinc dependencies.

06.02.25 BJH  Release 10.32

              Add rlatopam.  Thanks Simon Walton <simonw@matteworld.com>.

              Add pgmmake.

              bmptopnm: Understands RLE4/RLE8 compressed BMP.  Thanks
              Prophet of the Way <afu@wta.att.ne.jp>.

              pnmgamma: Add -bt709tosrgb -srgbtobt709, -bt709tolinear,
              -lineartobt709, -gamma, -rgamma, -ggamma, -bgamma (gammma
              values were formerly specified as parameters).

              pnmgamma: Rename -cieramp to -bt709ramp.

              pnmnorm: add -maxexpand option.

              ppmdraw: work on multi-image streams.              

              anytopnm: add mime time image/x-ms-bmp for BMP

              pamchannel: works on multi-image streams.

              pamstack: works on multi-image streams.

              Convert pnmdepth to pamdepth.  Add multi-image stream
              capability.

              pamcut: works on multi-image streams.

              pnmtops: allow -flate and -rle together.

              pnmtops: overhaul of -psfilter output.
              Thanks Chapman Flack <chap@anastigmatix.net>.

              pnmrotate: fine adjustment to arithmetic (rounding,
              pixel quantization).

              pbmtopsg3: Put currentfile ... in exec block.  Thanks
              Chapman Flack <chap@anastigmatix.net>

              pbmtopsg3: Add missing /EndOfBlock .  Thanks
              Chapman Flack <chap@anastigmatix.net>

              pnmtops: Don't claim EPSF if using setpagedevice.
              Thanks Chapman Flack <chap@anastigmatix.net>

              giftopnm: do "reading image sequence N" message only if
              being verbose.

              ppmtobmp, bmptopnm: major speed improvement for PBM.  Thanks
              Prophet of the Way <afu@wta.att.ne.jp>.

              pbmtog3: Use new GCC features instead of assembly language
              for superspeed operations.  Thanks
              Prophet of the Way <afu@wta.att.ne.jp>.

              pm_make_tempfile(): Use TEMP and TMP environment variables if
              TMPDIR not set.

              pm_make_tempfile(): improve error message.

              libpam: pnm_writepamrowmult() respects pam.plainformat.

              libpam: pnm_writepaminit() checks -plain option for PAM format
              (recognizes the error).

              ppmtoglobe: Fix wild pointer bug.

              Fix wild pointer in REALLOCARRAY(). Affects ppmdraw,
              escp2topbm, ppmtowinicon, ppmtompeg, pnmtopalm,
              pnmtopng.  Thanks Steve Summit <scs@eskimo.com>.

              pnmtopng: fix bug with undefined cmdline.modtimeSpec.
              Thanks Mike Frysinger <vapier@gentoo.org>.

              pnmquant: Use Perl sysseek() instead of seek() to avoid
              a mispositioned file disaster on some platforms.

              pamditherbw, pgmtopbm: fix bug: overly dark with cluster
              methods because only 1/4 of the dither matrix is used.
              Thanks Mark Williams <mark@aziraphale.homeip.net>.

              pnmrotate: fix bug: garbage in lower right corner of background
              with -noantialias.

              pnmsmooth: change to regular Netpbm syntax.  Replace -size
              with -width and -height.

              pnmsmooth: fix bug: free of temp file name even when there
              is no temp file (-dump option).

              pnm_scaletuplerow() fix bug: does nothing when old maxval ==
              new maxval.  Affects pamedge only.

              ppmtompeg: Fix array/pointer degeneration mess with LumBlock
              arguments; fix crash.

              pamstereogram: Fix crippling bugs.  Thanks Scott Pakin
              <scott@pakin.org>.

              giftopnm: Fix bug with interlaced GIF < 5 rows.

              giftopnm: Handle case of a clear code at the end of a block.

              ppmtogif: Fix bug with interlaced GIF < 5 rows.

              cameratopam: Fix segmentation fault from undefined 'ifp'.
              Thanks Bernard Hatt <bmh@arkady.demon.co.uk>.

              xwdtopnm: Fix bug from 10.31: LSB-first XWDs convert to all
              black.

              ppmglobe: fix bug: always says stripcount is zero
              because it looks at the wrong argument.  Thanks Urs Enke
              <urs.enke@rwth-aachen.de>.

              pnmtotiffcmyk: Fix inttypes conflict on AIX.

              Stop exporting stripeq().
         
              Add -lm to link of libnetpbm shared library, to express the
              fact that code in libnetpbm requires it.  Helps GNU Ld
              --as-needed.

              Build: move symbolic links to header files into
              'importinc' directories to keep directories cleaner.  Fully
              populate 'importinc' in every directory so we don't have
              to maintain a list of header files for each.

05.12.23 BJH  Release 10.31

              Add pamgradient.

              libnetpbm/everything: speed up ppm_readppmrow() and
              pgm_readpgmrow() by doing one fread per row instead of a
              pgm_readrawsample() per sample.  Thanks "Ariel Berkman"
              <aberkm1@uic.edu>.

              libnetpbm: Make PGM, PPM, and PNM routines read suitable
              PAM images.

              pnmsplit: upgrade to pamsplit.

              xwdtopnm: Add ability to work with bits per pixel >
              bits per item.  Replace whole pixel reader.

              pamtotiff: Use TIFFDefaultStripSize() for ROWSPERSTRIP default.

              pamtotiff: add -tag option.  Thanks Gary Gorbet
              <ggorbet@sdicgm.com>.

              ppmglobe: add -background, -closeok, filename argument.

              pnmcolormap: Work on multi-image stream (one map for all).

              pnmtopclxl: read/convert/write one row at a time.
              Thanks Martin Buck <m@rtin-buck.de>.

              ppmtolj: read/convert/write one row at a time.
              Thanks Martin Buck <m@rtin-buck.de>.

              ppmtoxpm: fix bug: produced incorrect output when number
              of colors is a power of 92.  Thanks Mark Weyer.

              pnmcolormap: fix bug: crashes with input depth > 3.

              pambayer: fix bug: doesn't actually read input file.

              ppmtompeg build: add missing const to work around TRU64
              compile failure.

              xwdtopnm: Fix handling of padding at end of XWD row.

              pamtotiff: fix bug with PAMs with > 3 planes.

              Remove PPM_PACKCOLORS.

              pnmremap: fix arithmetic overflow bug with maxval > 255 that
              caused random pixels.

              remove global "cmdline" variables from all programs (4 had them).

              pnmtops: remove extra %%%%Page from 10.27.

              mkinstalldirs: remove chmod 755 to match Automake's
              mkinstalldirs.

              libopt: add -quiet option

              ppmtojpeg: fix prototype mismatch when building without
              the JPEG function.

              libnetpbm: fix: PPM_DISTANCE uses red twice instead of and green.

              pnmnlfilt: fix alpha ranges.
         
              cameratopam: replace setenv with putenv so it works on Solaris.

              cameratopam: put in workaround for Solaris header file bug.

              pngtopnm: fix bug: grayscale PNG produces PPM.  s/b PGM.

              anytopnm: Use sed instead of Awk -- more universal.

              anytopnm: fix "INTERNAL ERROR" crash due to "filetype" variable
              not set.

              rletopnm: fix crash when input file is empty or
              there are various other problems reading its header.

              rletopnm: fix universal crash in option parser.

              tifftopnm: fix crash due to uninitialized variable.

              libnetpbm: Fix bug from 10.30: erroneously says a PAM header
              line is missing.

05.10.16 BJH  Release 10.30

              Add pambayer.
              
              Add pamrgbatopng.
                            
              Add pamtilt.  Thanks Gregg Townsend <gmt@cs.arizona.edu>.
              
              pamtotiff: create from pnmtotiff.

              pamtofits: create from pnmtofits.

              pamaddnoise: create from pnmaddnoise.
         
              pamarith: Add -divide.

              pammasksharpen: Add -sharpness.

              pnmtopng: add -comp_mem_level, -comp_strategy, -comp_method,
              -comp_window_bits, -comp_buffer_size.

              pnmtopng: use Shhopt command line processor; replace
              -chroma with -rgb, -phys with -size, -time with -modtime.

              pnmremap: Handle multiple image stream.

              xpmtoppm: Expand capacity from 2K character input lines to
              8K character input lines.

              libnetpbm: improved messages for "color xxx cannot be
              represented precisely with maxval M"

              libnetpbm color specification parsing:  Improve warning message
              about rounding.

              libnetpbm/everything: speed up ppm_writeppmrow() and
              pgm_writepgmrow() by doing one fwrite per row instead of
              a pgm_writerawsample() per sample.

              pnmtopng: fix "meaningful bits" optimization of PGM so it
              optimizes all the way instead of stopping at 4 bits.

              pnmtopng: fix crash when no -alpha option, due to dereferencing
              of undefined alpha_mask.

              pnmtopng: fix bug: arbitrary color made transparent in
              paletted PNG when nothing should be transparent.

              pnmtops: bug: selects wrong Postscript level.

              ppmtowinicon: use REALLOCARRAY instead of arithmetic-overflowing
              realloc().

              anytopnm: fix bug: fails when 'file' database doesn't
              have mime type but does have human-readable type.
              
              manweb: recognize directory as not executable in search of PATH.

              pgm_allocrow(), ppm_allocrow(), pnm_allocrow(): cure
              arithmetic overflow.

              libnetpbm: On plain formats, check for sample value exceeding
              maxval.

              libnetpbm: reject maxval > 65535 in "pam" functions. 

              pamarith: Use normalized libnetpbm facilities to get
              proper accuracy.  Thanks Thomas Henlich
              <http://sourceforge.net/users/thenlich/>.

              pamarith: fix bug: shift functions don't work when maxvals
              are not identical.

              pamarith: fix rounding error on multiply.

              pgmtexture: correct calculation of normalizing constants
              for d > 1.  Thanks Marc Breithecker
              <Marc.Breithecker@informatik.uni-erlangen.de>.

              pnmnorm: fix divide by zero crash.

              pnmnorm: fix bug that doesn't let you specify
              -luminosity, -colorvalue, or -saturation.

              ilbmtoppm: fix variable used before set.

              pnmtofits: fix 16 bit sample values > 2**15.

              pnmtopsnr: minor adjustments to messages.

              pnmnorm: don't crash when wvalue == bvalue.  Thanks Thomas
              Henlich <http://sourceforge.net/users/thenlich/>.

              pnmnorm: fix rounding of output values.  Thanks Thomas
              Henlich <http://sourceforge.net/users/thenlich/>.

              pnmhisteq: Fix external map to have width maxval + 1 instead
              of maxval, so full intensity input pixels map properly.

              pnmhisteq: Fix -rmap.

              Fix typos in error messages in various programs.

              pgmmedian: change syntax to Netpbm standard.

              pammasksharpen: fix signedness bug that caused random bright
              pixels at edges.

              pammasksharpen: fix bug with maxval != 255.

              Clean up a bunch of function prototypes so some broken
              compilers don't complain about missing "const" in them.

              Remove dependency of pnmtops on basename().  It isn't in
              some C libraries and we don't want to mess with linking
              extra libraries.

              Build of ppmsvgalib: work properly when LINUXSVGALIB is
              a "default path" value such as "libvga.so".

05.08.15 BJH  Release 10.29

              Add ppmdraw.

              Add pammixinterlace.  Thanks Bruce Guenter <bruceg@em.ca>.
              
              Add pgmmedian.

              Add pnmaddnoise.

              pnmtopclxl: add -rendergray option.

              pnmtopclxl: add -jobsetup option.
              
              pstopnm: add -dSAFER Ghostscript option.

              pnmcrop: add -margin option.

              pnmcrop: add -borderfile option.

              pnmnorm: add -luminosity (which was already default),
              -colorvalue, and -saturation.
         
              pnmtopng: Don't include any alpha info if supplied alpha mask
              is all opaque.

              ppmcie: Make white point mark more visible.

              pamdice: Remove restriction of 100 slices in each direction.

              pnmtopng: Fix bug: erroneous transparent pixels when supplied
              alpha mask is all opaque.
              
              Fix bytesToWordInt(): converts incorrectly on a machine that
              has pointer size != word size and uses the general case code.

              libnetpbm: fix basic pm_readlittleshort() bug introduced
              in 10.27.  Affects mdatopbm, rawtopgm, lispmtopgm,
              pcxtoppm, winicontoppm, bmptopnm, sirtopnm, xwdtopnm,
              cameratopam.

              pamlookup: fix universal crash.  Thanks "Colley, Anthony
              W." <Anthony.Colley@ngc.com>

              pbmtolj: fix bug from 10.28: crashes with a line which is
              a multiple of 8 plus 7 pixels wide not counting white right
              margin.

              ppmtompeg: fix uname() rc test (sometimes > 0 is success).

05.06.06 BJH  Release 10.28

              Add cameratopam (Dave Coffin's dcraw).

              ppmtoxpm: ignore empty or similar malformed XPM line instead
              of giving up.

              pbmtolj: do multi-image stream.

              pnmindex: rewrite in C.

              Fix Gcc 3 warnings.

              pamcomp: fix out of memory problem due to uninitialized
              pam.allocation_depth.

              anytopnm: remove apparently redundant traps of signals.

              pnm_alloctupletable(): fix bug - returns random value.
              (affects pnmcolormap, pnmremap, pnmquant, others).
         
              jpeg2ktopam: fix array bounds violation on 64 bit machines.
              Thanks Frederic Devernay <Frederic.Devernay@inrialpes.fr>.

              rle_open: remove extraneous errno declaration.  Thanks
              Joerg Sonnenberger <joerg@britannica.bec.de>.

              pm_tmpfile, pm_make_tmpfile: rearrange code.

              ppmtompeg: fix insecure temp file.  Thanks Alexey
              Tourbin <at@altlinux.ru>.

              libnetpbm: fix basic readlittlelong() bug introduced in 10.27.
              Affects xwdtopnm, bmptopnm, winicontoppm, lispmtopgm.

              pbmtext/libnetpbm: fix crash with -builtin=fixed.

              pbmtoppa: fix floating point exception always due to
              undefined DPI.

              fix jpeg2000 build failure on system without inttypes.h,
              etc.  Build now excludes jpeg2000 if you don't have 64
              bit capability, which practically means you have
              inttypes.h, etc.

              jpeg2000: don't do unsafe temporary files.

              ppmshadow: make it work with old Perl.

              pnmquant: remove use of Fcntl::seek, not available in
              Perl 5.00503.

              pnmquant: make -quiet option work.

              pnmgamma: Correct math in -srgbramp.  Add proper rounding.
              Thanks Horst J. Wobig (hjw.fsw@wobig.de).

              ppmshadow: fix blurring of non-translucent shadow.

              ppmtoxpm: fix use of uninitialized variable that results
              in invalid color map.
         
              Fix backward pnmtopnm - pamtopnm symlink.

05.03.28 BJH  Release 10.27

              tifftopnm: do multi-image streams.

              pnmtotiff: add -append option.

              pnmtotiff: do multi-image streams.

              pnmtopclxl: fix bug with invalid palette in
              SetColorSpace command.

              pnmtopng: don't accept -background without -mix.

              Eliminate pnmtopnm program -- install 'pnmtopnm' as an
              alternate name for 'pamtopnm' instead.

              pamscale: refilter as part of resampling for better
              quality downsampling.

              ppmcolormask: fix segfault with stdin input.

              Add pm_setjmpbuf().

              pnmindex, ppmquantall: use pnmquant instead of ppmquant.

              pnmquant: add -quiet, -plain options

              ppmfade, pnmshadow, pnmindex, pamlookup: Use pamscale
              instead of pnmscale.

              ppmtoxpm: Don't include superfluous entries for colors
              of transparent pixels, or for transparency when there are
              all colors are opaque, in the XPM color map.
              
              pnmquant: remove dependency on File::Temp, not available
              before Perl 5.6.1.

              pamfunc: use multiplication instead of division for -divisor,
              for speed.

              pamfunc: fix bug in -adder and -subtractor with signed
              arithmetic.  Thanks David Jones <drj@pobox.com>.

              pamscale: fix bug in converting negative floats to integers.
              Thanks David Jones <drj@pobox.com>.

              pamscale: fix bug with -filter: scanbuf too small, thus
              some output rows/columns can never be created and output raster
              is invalid.

              build: fix build errors in ppmtompeg with OMIT_NETWORK.

              jpeg2ktopam: fix uninitialized memory problem in allocating
              jasperCmptNo.

              pbmclean: fix -minneighbors so it isn't really -minneighbor.

              pnmremap: allow RGB map and BLACKANDWHITE/GRAYSCALE input.

              pamstereogram: fix bug with -eyesep (float/double).

              pamtojpeg2k: fix bug with -compression (float/double).

              pamtojpeg2k/jpeg2ktopam: work on 64 bit machine; fix
              definition of int32fast_t, etc. in libjasper.

              libnetpbm: Respect plainness of specified format when writing.

              pnmremap: fix handling of arithmetic overflow in color
              distance calculation.

              pnmremap: fix bug with palette of different depth from image.
              
              libnetpbm: fix 2 byte per pixel pnm_pamwriterow(),
              pnm_formatpamrow().

              pbmmake: fix bug: requires color option.  (Introduced ca.
              10.23).

              -plain works with PAM write functions.

              common -plain option causes failure instead of wrong output
              when used with PAM output.

              pnmremap: fix rounding error where map maxval is small and
              unequal to image maxval.

              Add pnm_normalizeRow(), pnm_unnormalizeRow(),
              pnm_creategammatransform(), pnm_createungammatransform(),
              pnm_freegammatransform(), pnm_freeungammatransform().
              Idea and prototype from "Scott T. Smith" <scott@gelatinous.com>.

              pamscale: Use pnm_noramlizeRow() to speed up gamma adjustments.

              palmtopnm: Don't assume Palm Bitmap is valid.
              Thanks Paul Bolle <pebolle@tiscali.nl>.

              giftopnm: fix crash with input that has bogus color indices
              in the raster.

              giftopnm: fix crash with input that has a bogus minimum code
              length field.  Thanks deekoo@tentacle.net (Deekoo L.).

              pnm_readpamrown(): use pnm_readpamrow() instead of
              pm_getraw() for speed.  Similar for pnm_writepamrown().

              pnm_readpamrown(): use multiplication instead of division
              for speed.  Thanks "Scott T. Smith" <scott@gelatinous.com>.
         
              pm_readbiglong(), etc.: pm_error() in case of failure.

              Add pm_readchar(), pm_writechar(), pm_readcharu(),
              pm_writecharu().

              pnmtopalm: Add packbits compression.

              pnmtopalm: Add version 3 capability (-density, -withdummy).

              pnmtopalm: fix bug: incorrect between-image pad amount.

              pnmtopalm: fix compressed images.  use 0 compressed size
              field - not totally correct, but passable.

              palmtopnm: fix incorrect handling of some combinations of
              PALM_IS_COMPRESSED flag and compression type field.
              Thanks Paul Bolle <pebolle@tiscali.nl>.

              palmtopnm: fix totally broken RLE and scanline compression.
              Thanks Paul Bolle <pebolle@tiscali.nl>.

              palmtopnm: handle PackBits compression.  Thanks Paul
              Bolle <pebolle@tiscali.nl>.

              palmtopnm: handle Version 3 encoding.  Thanks Paul Bolle
              <pebolle@tiscali.nl>.

              Make makeman put in missing newline.  Thanks Eric S. Raymond
              <esr@thyrsus.com>.

              Include libz in build of programs that use TIFF library.

              palmtopnm: fix wrong check for disallowed combination of
              -transparent and -rendition.

              pnmtops: Add -psfilter, -flate, -ascii85, -level options.

              pnmtops: Add -dict, -vmreclaim options.

              pnmtops: improve %%Title

              pamcomp: fix bug that duplicates last row of overlay image.
              Thanks achurch@achurch.org (Andrew Church).

              pamcut: fix bug that fills the rightmost column with black.
              Thanks achurch@achurch.org (Andrew Church).

              pnmtops: Add -noshowpage option.

              pnmtops: Add %%%%Page. (whoops, this actually added a second
              %%%%Page.  Removed in 10.31).

              pnmtopalm: fix bug with -offset option.

              xwdtopnm: recognize TrueColor visual class in header dump.

              ppmforge: fix bug: crash due to wild pointer with -night.
              Thanks John Walker <kelvin@fourmilab.ch>.

05.01.01 BJH  Release 10.26

              pnmhistmap: Add -dots, -nmax, -red, -green, -blue, -lval,
              -rval, -height, and -width options.
              Thanks "John H. DuBois III" <spcecdt@armory.com>.

              pnmnorm: accept -wpercent and -wvalue (or -bpercent and -bvalue)
              together.  Thanks Gregg Townsend <gmt@CS.Arizona.EDU>.
         
              xwdtopnm: Add -headerdump option.

              pnmtoxwd: Include 256 color color maps in direct color instead
              of zero.  Zero has a weird effect.

              pamtotga: recognize RGB_ALPHA instead of RGBA.

              palmtopnm: fix bug in determination of compression type.

              palmtopnm: fix bug in handling of multi-image streams.
              Thanks Paul Bolle <pebolle@tiscali.nl>.

              pnmtopalm: fix bugs in computation of nextDepthOffset.
              Thanks Paul Bolle <pebolle@tiscali.nl>.

              pamtotga: fix TGA pixel size for TGA with alpha.  Don't do
              colormap if input has transparency.

              pamtotga: fix crash due to uninitialized "id" field in TGA 
              header.

              pbm_writepbmrow(): Fix bug in MMX/SSE code that causes
              segmentation fault.

              pnmhistmap: Fix bug: doesn't work with maxval != 255.
              Thanks "John H. DuBois III" <spcecdt@armory.com>.

              pbmtext: fix crash with code point > 127.

              ppmtompeg: major cleanup.

              pnmtopng: fix "internal error" and crash bug with -transparent.

              pnmtoxwd: fix endianness on littleendian machines.

              pnmtoxwd: fix bug: doesn't work if you specify an option.
              
              jpegtopnm: fix bug: -dumpexif all wrong.

              jpegtopnm: fix bug: newline written to stdout instead of stderr
              with -dumpexif.

              Add missing 'col' declaration so -msse compile works.

              pcdovtoppm: fix syntax error

              pnmtojbig/jbigtopnm: add newline to "usage" message.

              pamperspective: fix bugs with -frame_include, etc.

              build: Jpeg2k programs build properly with newer Jasper library.

              build: Fix bug: "no rule to build xxx.so" with external
              Jasper or Jbig library.

              Add NAME and DESCRIPTION section to pointer man pages.

04.10.16 BJH  Release 10.25

              Add pcxstd.ppm.

              Add pbmtoibm23xx.  Thanks Jo Fahlke <jorrit@jorrit.de>.

              Add pamedge, replacement for pnmedge.
         
              pamperspective: add -frame_include, -*margin, -include.

              pamcomp: Handle RGB_ALPHA and GRAYSCALE_ALPHA images,
              using the opacity plane.
              
              pamscale: do transparency pixel mixing properly.

              ppmtompeg: cleanups and additional verbosity.

              anytopnm: Use 'nawk' instead of 'awk' where available.

              anytopnm: Don't use -e.  (not available everywhere).

              tifftopnm: Add warning when Whole Image method reduces
              resolution to 8 bit.

              pamtopnm: accept extra planes (ignore them).

              pamcut: major speedup.  Thanks Prophet of the Way
              <afu@wta.att.ne.jp> (Akira Urushibata ("Douso")).

              Add pnm_getopacity().

              libnetpbm: "pam" read and write routines much more
              efficient.  Thanks Prophet of the Way
              <afu@wta.att.ne.jp> (Akira Urushibata ("Douso")).

              Add pnm_formatpamrow(), pnm_allocrowimage(),
              pnm_freerowimage().  Thanks Thanks Prophet of the Way
              <afu@wta.att.ne.jp> (Akira Urushibata ("Douso")).

              pnm_readpamrow(): Add option to have "tuplerow" argument
              NULL and not get the row's contents.  Thanks Thanks
              Prophet of the Way <afu@wta.att.ne.jp> (Akira Urushibata
              ("Douso")).

              Add pnm_writepamrowmult().  Thanks Thanks Prophet of the
              Way <afu@wta.att.ne.jp> (Akira Urushibata ("Douso")).

              libnetpbm: format plain format images more nicely.
              Thanks Thanks Prophet of the Way <afu@wta.att.ne.jp>
              (Akira Urushibata ("Douso")).  

              pamcut: fix bug: Blows up instead of failing cleanly
              when you try to cut beyond the bounds of the image.
              Thanks Thanks Prophet of the Way <afu@wta.att.ne.jp>
              (Akira Urushibata ("Douso")).

              fix bug: MMX/SSE fast PBM writing (with gcc -msse) all wrong.

              pamscale; fix bug: -linear option sense reversed.

              pamscale: fix bug: everything too dark when using resampling
              to enlarge.

              Speed up pbm_writepbmrow() (and all PBM output programs)
              by going a byte at a time.  Thanks Prophet of the Way
              <afu@wta.att.ne.jp>.

              pamperspective: fix bug that can cause memory corruption
              and crashes.  Thanks Mark Weyer
              <Mark.Weyer@math.uni-freiburg.de>.

              ppmtompeg: put in proper marshalling/unmarshalling so as not
              to depend on a 32 bit integer type.

              ppmtopcx: add -palette option.

              pnmconvol: fix bug: green and blue convolution matrices
              exchanged, gray exchanged with random.

              ppmtowinicon: fix bug: crashes on 32 bit images.
         
              Use <inttypes.h> or <types.h> where possible, dynamically
              built "inttypes.h" where not.  Eliminate uint32n.

              Handle BITS_PER_WORD=64 in wordaccess.h so it builds on 
              64 bit platforms.

04.08.11 BJH  Release 10.24

              g3topbm: Add -stop_error.

              Add makeman to build tools.  Thanks Eric S. Raymond
              <esr@thyrsus.com>.

              pamflip: Large speed, memory improvements for
              non-diagonal flips.  Thanks Prophet of the Way
              <afu@wta.att.ne.jp>.

              jbigtopnm, pnmtojbig: Use packed PBM functions to speed up
              greatly.  Thanks Prophet of the Way <afu@wta.att.ne.jp>.

              g3topbm: Don't fail on premature EOF; produce partial
              output instead.

              add pnm_maketuplergb(), pnm_makerowrgb(), pnm_makearrayrgb().

              Fix a bunch of programs that, starting with 10.23, have too
              large a "len" field in the pam structure, causing storage
              overwrites.

              pbmtext: fix free of unallocated storage bug with stdin
              input text.

              pnm_writepaminit(): deal correctly with pam structure that
              doesn't contain tuple_type member.

              Fix pamP->allocation_depth == 0.

              pamstretch-gen: use pamscale instead of pnmscale.

              Generate pm_config.h at make time.  Determine endianness
              and word size stuff dynamically.  Use uint32n instead of
              uint32_t in infotopam.c.
         
              fitstopnm: fix MIN/MAX transposition in maxval bounding.
         
              Fix bug: "wordn" in place of "wordint" in wordaccess.h.

              Fix bug: -plain option on "pam" programs generated plain
              header, but raw raster.

04.07.17 BJH  Release 10.23

              Add pamgauss.

              Add pammasksharpen.

              Replace pnmtoplainpnm with pnmtopnm.

              pnmconvol: Add -nooffset.

              pamdice: add -hoverlap, -voverlap.  Thanks Geoff
              Kuenning <geoff@cs.hmc.edu>.
         
              pbmtoepson: Add -dpi, -adjacent, -noadjacent, and -protocol
              options.

              pstopnm: recognize Encapsulated Postscript by presence of 
              "EPSF-" in the header instead of a whole specific header line.
              Thanks Philip Hallstrom <philip.hallstrom@gilbarco.com>.

              pnmpad: Allow -left/-right along with -width,
              -bottom/-top along with -height.  Thanks David Jones 
              <drj@pobox.com>.

              pnmpad: round to nearest instead of lowest in interpretation
              of -halign, -valign.

              pnmsplit: Add -padname option.

              pnmenlarge: work on multi-image streams.
              
              libnetpbm: add allocation_depth to PAM structure.  Add
              maketuplergb(), makerowrgb(), makearrayrgb().

              pnminvert: much faster for PBMs.  Thanks 
              Prophet of the Way <afu@wta.att.ne.jp>.

              pbmmake: use packed bits to speed up.  Thanks Prophet of
              the Way <afu@wta.att.ne.jp> (Akira Urushibata ("Douso")).

              pbmtog3: speedups.  Thanks Prophet of the Way
              <afu@wta.att.ne.jp> (Akira Urushibata ("Douso")).

              Fix gamma value (from .45 to 2.2) in pm_gamma709(), 
              pm_ungamma709().

              pgmramp: Fix signedness bug with -rectangle, -ellipse.

              pnmtojpeg: fix bug with large exif files. (negative malloc)

              pnmtopng: Fix estimation of whether it's better to use a
              colormap or not.
         
              Add pamditherbw, replacement for pgmtopbm.

              pamperspective: Fix bug.  Incorrect output.  Thanks
              <Mark.Weyer@math.uni-freiburg.de>.

              ppmtompeg: fix crash with input that is not a multiple of
              16 pixels high and wide.

              pamtotga: fix crash due to freeing nonexistent color table.

              pamtotga: fix bug: invalid TGA when you use -rgb with a
              non-color input.

              pgmtopbm: fix calculations that divide by maxval+1; should
              divide by maxval.  Thanks David Jones <drj@pobox.com>.

04.05.01 BJH  Release 10.22

              Add pamperspective.  Thanks Mark Weyer
              <Mark.Weyer@math.uni-freiburg.de>.

              Add pamstereogram.  Thanks Scott Pakin <scott@pakin.org>.

              Add pc1toppm.  Thanks Roine Gustafsson
              <roine@users.sourceforge.net>.

              Add pbmtodjvurle.  Thanks Scott Pakin <scott@pakin.org>.

              Add infotopam.  Thanks Rich Griswold <griswold@acm.org>.

              Add pamtopfm, pfmtopam.

              ppmtowinicon: Add -truetransparent.

              ppmtowinicon: remove old, wrong, undocumented -andppm synonym
              of -andpgm.

              ppmtopcx: Add -stdpalette option.

              pamsumm: Add -brief, -normalize.

              All programs that interpret color specifiers (ppmchange, etc.):
              warn if the specified color can't be represented, to the 
              precision specified, in the operative maxval.

              ppmchange: fail if the specified color can't be represented in
              the maxval of the input image.

              pcxtoppm: Imply standard palette when palette in PCX header is
              all black.  This function apparently got lost some time since
              it was added in 1994.
              
              pcxtoppm: Add the color palette to -verbose output.

              ppmtopcx: Fix bug: wrong 256 color PCX output.  From
              10.21.  Thanks Timothy Borgeaud
              <timothy@borgeaud.freeserve.co.uk>.

              Convert ppmtodjvurle into pamtodjvurle.

              pngtopnm: Dump additional info about PNG with -verbose.

              pngtopnm: Use Netpbm command line parser.

              pbm_readpbmrowpacked(): Fix bug: ORs bits into return value
              instead of setting them.  Affects pbmtoescp2.

              ppmtopcx: Fix bug: don't add black to a palette if it's not
              already there.

              pnm_tuplehashtotable(): fix allocsize (maxsize) = 0 case.

              pamflip: fix bug with random memory accesses due to
              signed/unsigned comparison.

04.03.28 BJH  Release 10.21

              Add pamsumm.

              Add pamsummcol.

              Add pamsharpness, pamsharpmap.

              Add ppmtodjvurle.  Thanks Scott Pakin <scott@pakin.org>.

              pstopnm: add -dpi option.

              ppmtopcx: add -planes option.
         
              pbmtext: add -width option.

              replace pnmcomp with pamcomp, do transparency right wrt gamma.

              tifftopnm: Use better CMYK->RGB algorithm: y=1-(b+k) instead
              of y=(1-k)*(1-b) in Row By Row mode.

              pbmtext/libnetpbm: Allow pbmfont fonts to have 96 characters
              (32-128) instead of 95.

              pnmtopng: fix bug with -transparent.

              pcxtoppm: remove debugging footsteps.

              pnmflip: pass through -plain, etc. to pamflip.

              Include pm_system.h, pm_gamma.h in package.

              ppmtomap: Change #/bin/sh to #!/bin/sh.

              ppmtogif: Don't violate array bounds when GIF color map is
              is larger than internal color map.

              yuvsplittoppm: Fix -ccir601 option; clean up.

              ppmtobmp: Fix bug: Generates invalid bits per pixel
              (e.g. 3) when input image has small number of colors.
              Thanks David Jones <drj@pobox.com>.

              pbmtog3: fix buffer overrun when image > 1728 columns.
              Thanks Prophet of the Way <afu@wta.att.ne.jp>.

              pnmsvgalib: Correct error message - too wide -> too tall.

              pnmtotiffcmyk:  Correct abs to fabs so -theta works.

              sldtoppm: Correct abs to fabs.

              pgmramp: Correct abs to fabs so -rectangle and -ellipse work.

              pgmramp: Don't crash with -rectangle and height or width = 1.

              ppmforge: Correct abs to fabs so the planet is more than
              2 pixels wide.  Also recode much of program in high level C.

              pnmtojpeg: interpret "length" field in exif data as unsigned
              16 bit instead of signed.

              pnmrotate: fix bug: always crashes in memory free

              pnmrotate: remove debugging messages.

              Declare _XOPEN_SOURCE=500 in programs that use strdup() so
              C libraries that don't have _BSD_SOURCE will declare it.

              Use FTELLO macro so things compile on a system that
              doesn't have ftello.  Don't assume _LARGE_FILE_API means
              ftello is available -- _LARGE_FILE_API is input to libc, not
              output from it.

04.01.30 BJH  Release 10.20

              pamscale: derive from pnmscale.

              pamscale: Add resampling/convolution code.  Thanks
              Michael Reinelt <m.reinelt@steinhilberschwehr.at>.

              pamscale: Do math in linear intensities instead of
              gamma-adjusted.

              pamscale: Add -xyfill.

              pnmtopng: Remove global variables.  Solves a problem with 
              conflicting name with libc: "gamma".
                       
              pbmtomda: make program identifier 'MicroDesignPCW'.  Thanks
              John Elliott <jce@seasip.demon.co.uk>.

              fitstopnm: Produce maxval 1 instead of 0 when input is all one
              value.  Use maxval 255 when samples are floating point.

              pamstretch-gen: be robust to invalid PNM input.

              anytopnm: do safe temporary files.

              ppmquantall: do safe temporary files.

              pnmindex: do safe temporary files.

              pnmmargin: do safe temporary files.

              pamstretch-gen: do safe temporary files.  Thanks 
              Stefan Nordhausen <nordhaus@informatik.hu-berlin.de>.
              
              tifftopnm: Do better validation of number of channels.
              
              libnetpbm: Add "normalized" (floating point) read/write
              routines:  pnm_readpamrown(), pnm_writepamrown(), 
              pnm_allocpamrown(), pnm_freepamrown().

              libnetpbm: Add pm_gamma709, pm_ungamma709().

              libnetpbm: rename createBlackTuple() to pnm_createBlackTuple().

              pm_openr_seekable(): use TMPFILE environment variable.
              Thanks Kai Strieder <ska@pixelboxx.de>.

              libnetpbm: Fail when input maxval is 0.  This wreaks havoc
              with such things as rescaling to a new maxval.

              pnmquant: Fix bug wherein all options are rejected.

              ppmshadow: Fix crash in all invocations.

              pnmtopng: fix bug with array bounds violation with -alpha.
              Usual symptom: "internal inconsistency" message.

              anytopnm: Remove "function" so it works on FreeBSD.

              configure: Do a better job of choosing between -R and -rpath.

              configure: Add test compile for PNG, Z libraries.

03.11.15 BJH  Release 10.19

              ppmhist: Add -float option.

              ppmhist: speed up -colorname by reading color dictionary only
              once.

              bmptopnm: fix bug with BMPs that end prematurely.

              giftopnm: Properly generate alpha mask when the same
              color is both transparent and opaque in the GIF.  Thanks
              Karl Zilles <zilles@1969.ws>.

              rgb.txt: move D65 to the end, so "white" is preferred.

              xwdtopnm: change interpretation of bitmap_pad and bitmap_unit
              to accomodate Xfree86 direct color 24 bit xwd.

              pbmtextps: fix bug where intermediate file gets truncated.

              pstopnm: fix bug in which Standard Input never works.

              ppmtobmp: change 'char' to 'unsigned char' to work around a
              Solaris C library bug.

              ppmtobmp: handle maxval properly for maxval != 256 truecolor BMP.
              Thanks Michael Buchholz <michael.buchholz@deu.mci.com>.

              ppmquant: replace with wrapper for pnmquant, because ppmquant
              had some really hard bug in computing the new color set.

              Fix stack corruption in pXm_check() on systems that have
              both 32 and 64 bit file offsets.

              Add 'makecat' build tool and description to USERDOC of
              using lynx -dump to get man-able documentation.

              Make AIX shared library build work, with -qmkshrobj.

              configure: Add intelligence to default location for zlib,
              libpng headers.

              configure: Make shared libraries work on AIX.

              Add netpbm-config.

              installnetpbm: don't crash on mkdir on old Perl.

03.09.19 BJH  Release 10.18

              Add escp2topbm, pbmtoescp2.  Thanks Ulrich Walcher
              <u.walcher@gmx.de>

              Add pbmtomatrixorbital.

              Add ddbugtopbm by Russell Marks.

              bmptopnm: Handle transparency, arbitrary pixel format (rgba
              masks in BMP header).

              bmptopnm: Handle top-down BMP.

              bmptopnm: Handle 32 bit BMP.  Thanks Aaron Orenstein
              <aorenste@grandvirtual.com>.

              ppmtopcx: add -8bit option.  Thanks Holger Schemel
              <holger.schemel@telefonica.de>.

              ilbmtoppm: recognize (and ignore) DPPS and TINY chunks.

              pbmpage: Add solid perimeter box to Pattern 1.

              anytopnm: use 'file --mime' where available to determine file
              type more robustly.

              manweb: make 'webdir' a list of directories instead of just one.

              pnmpsnr: fix bug: Cr and Cb interchanged.  Thanks
              "Uwe Utecht" <uwe.utecht@bbc.co.uk>.

              pnmstitch: fix crash.  Thanks "Paul" <pwilkins@lashwhip.com>.

              manweb: add ability to read info files.

              configure: missing lineends for Solaris.

              anytopnm, ppmquantall: remove non-POSIX tail -N and egrep.

              pgmtexture: Fix Measure of Correlation-2 so small values don't
              turn into zero (replace abs() with fabs()).
         
              Add and use MALLOCVAR and MALLOCARRAY utility macros.

              Allocate rows individually if can't get all rows in a single
              memory block.

              Remove hpcdtoppm from the main package because it isn't
              licensed properly to be distributed on Sourceforge.
              
              Remove "magic" file -- the version that comes with Christos
              Zoulas' 'file' package now contains everything that file had.

              configure: put space after -o in test compiles.

              Explicitly set SCRIPTS make variable to null so environment
              variable of the same name doesn't screw things up.

              Remove -DALL_SOURCE from AIX compile; define it in files that
              require it.

              Add -ffast-math option to recommended Gcc options.

              stamp_date: don't use LOGNAME as a variable (on AIX, you can't).

03.07.05 BJH  Release 10.17

              Various code cleanups based on TRU64 compiler warnings.

              Configure: print message when $OSNAME not recognized.

              Fix Makefile.common so LIBS and LOADLIBES work.

              Fix make file for Ppmglobe so it links the math library.

              Fix bug in xxx_check(): function/prototype mismatch
              causes bogus wrong-filesize error on systems where off_t
              is sometimes not 64 bits.

03.07.03 BJH  Release 10.16

              Add ppmglobe.  Thanks Max Gensthaler <Max@Gensthaler.de>.

              bmptopnm: Add ability to convert 16 bits per pixel Windows BMP.

              giftopnm: add -image=all.

              pnmtiff: Add -resolutionunit option.

              pnmtopng: fix bugs, remove limitations with -text.

              pgmabel: Declare internal subroutines 'static'.
              
              pstopnm: fix bug: encapsulated postscript confused with 
              regular postscript, so all pages get overlaid as one page.

              pnmrotate: Use smaller real memory working set.

              winicontoppm: use standard option parser.

              pnmflip: fix bug causing -r180 and -r270 to be ignored.
              Thanks YANO Hirokuni <hyano@ya-no.com>.

              configure: fix bug with missing space when using CFLAGS
              environment variable.

              Add CPPFLAGS and LOADLIBES to rules and 'configure' test
              compiles.

              Issue error message if you do 'make package' before 'make'.

              Add VERSION file to package.

              Use explicit library file name on a link instead of -L/-l
              where possible.

03.04.27 BJH  Release 10.15

              Add pamtohtmltbl.  Thanks Alexander B. Ivanov <ssh@S-and-B.ru>.

              Add pampop9.  Thanks Robert Tinsley, 
              <http://www.thepoacher.net/contact>.

              winicontoppm: Handle 24 bit direct color winicons.  Thanks
              Lee Benfield <lee@benf.org>.

              pnmrotate: add -background option.

              pnmtojpeg: Add -density option.

              pamtotga: Add alpha capability, via "RGBA" tuple type.

              libnetpbm: Add ppm_readcolornamefile().

              Make library and programs work with files > 2GB.  At least 
              on GNU and AIX.

              pbmtext: Add -momargin option.  Thanks "Slaven Rezic"
              <eserte@web.de>.

              pbmtoepsi: fix bug: non six-digit lines between 
              %%BeginPreview: ... and %%EndImage .  Thanks
              "K.Nakano" <ksk@seeds-man.com>.

              pnmrotate: fix bug: background color computed wrong.
              
              pnmrotate: fix bug: PBMs without -noantialias not properly
              promoted to PGM.

              pnmtops: fix bug: 1 bit per sample output when maxval is 2
              or 3.  Should be 4 bits per sample.

              pnmtops: fix bug: everything too dark when input maxval less
              than Postscript maxval.

              pm_nextimage(): fix bug: doesn't read past white space at the
              end of a plain-format raster.

              pnmremap: fix performance bug: don't put same color into hash
              twice.  Thanks Hannu Koivisto <Hannu.Koivisto@ionific.com>.

              ppmtoxpm: Add -hexonly.  Default to system color dictionary.
              Use standard library routines to access color dictionary.

              pnmcolormap: Keep only one row at a time in memory.

              bmptopnm: fix buffer overrun with wild ColorsUsed value.

              Change ordering of include files in parallel.c so it compiles
              on AIX 5.

              configure: change -O2 to -O0 for broken gcc compiler.

              One more chop at the -R/-rpath issue: new defaults for Solaris.

03.02.13 BJH  Release 10.14

              Add pamedge, adapted from pnmedge by Peter Kirchgessner, 1995.

              Add ppmwheel, adapted from ppmcirc by Peter Kirchgessner, 1995.

              Add ppmtoarbtxt, renamed from ppmtotxt by Peter Kirchgessner,
              1995.
              
              pnmflip: add pnmflip directory to search path for pamflip.

              picttoppm: Recognize DirectBitsRgn opcode.  Thanks
              <kabe@sra-tohoku.co.jp>.

              ppmbrighten: -normalize works with nonseekable input.

              jpegtopnm: Update exif stuff to match Jhead 1.9.

              bmptopnm: fix for the case of ColorsUsed != 0 in 
              non-colormapped (24 bit) image.

              pbmtopgm: limit the maxval to legal values.
         
              pamarith: minimum output maxval of 2 for -compare.

              rgb.txt: remove redundant lines, clean up.

              pnmgamma: fix bug in -ungamma -cieramp. 1/gamma vs gamma.

              pnmtopng: fix bug: background color = transparent color in
              colormapped image causes transparent color not to be
              transparent.  Also make bilevel images with background color
              use 1 bit per pixel instead of 2.

              pngtopnm: Fix bug: wrong exit code.

              Fix broken ISUPPER; affects sbigtopgm and color name functions

              pamflip: Use bundled strsepN() instead of strsep().

              giftopnm: fix bug with GIFs that (invalidly) contain translation
              cycles.  Clean up LZW decompression so it is readable and more
              robust.
              
              Add strsepN() to libnetpbm, because strsep() is not available
              everywhere.

              Change --rpath to -rpath.

              Change LINKERISGCC to LINKERISCOMPILER and default to Y.

              configure: Handle explicit "none" response to svgalib prompt.

              Add merge.o (vs mergelist) method of doing merge build.
         
              Fix bug: jbig converters missing from merge build.

03.01.09 BJH  Release 10.13

              Add pamlookup.
              
              Add pamflip: replacement of pnmflip.  Does PAM images and has
              -xform option.

              Add pm_system().

              Ppmrainbow:  Add -norepeat option.

              tifftopnm: handle 32 bits per sample -- Use upper 16 bits.

              tifftopnm: add -byrow.

              pamarith:  Add -compare operator.

              ppmtompeg: Check for missing YUV_SIZE option with 
              -combine_frames and -combine_gops.

              ppmtompeg: fix buffer overrun with invalid message received
              by slave processor.

              pamseq: Fix crash/memory corruption.

              pamseq: Remove debugging statement.

              Add some protection against Netpbm images that indicate
              dimensions too big to process without arithmetic overflow.

              Replace isdigit() with ISDIGIT(), etc.

              pnmnorm: malloc histogram array instead of using stack
              variable to avoid stack overflow.

              thinkjettopbm: works with Solaris Lex.
              
              Add PKGDIR_DEFAULT Makefile.config variable.

              Configure: Test for old JPEG library without jpeg_marker_struct.

              Configure: Add -I/usr/local/include and -I/usr/local/lib to
              OpenBSD and NetBSD compiles and links.

              Change make variable from INCLUDE to INCLUDES to avoid collision
              with Cygwin environment variable.

02.11.09 BJH  Release 10.12
              
              Add pamtojpeg2k, jpeg2ktopam.

              pnmtotiff: add test for seekable output.

              pnmflip: use packed PBM format to save memory.  Thanks
              Ivan Karski <karski@nym.alias.net>.

              thinkjettopbm: replace getopt with shhopt to avoid header file
              problem (getopt.h) on some systems.

              fix multiple definition problem with pm_plain_output.

              pgmminkowski, pgmmorphconv: fix bug: programs missing.  These
              were formally added in 10.0, but the code never actually went in.

              pbmtomda: fix crash with input image not multiple of 4 rows.

              tgatoppm: fix segfault in option processing from recent
              option processor change.

              Slight correction to coefficients in pnm_YCbCrtuple.

              Add pnm_YCbCr_to_rgbtuple() to libnetpbm.

              ppmtompeg: fix build failure with NETWORKLD=NONE.

              ppmtompeg: fix build error due to broken C library header files
              on SunOS.

              Fix missing alias symlinks in merge build.

02.10.17 BJH  Release 10.11
         
              Fix nstring.h, ppmcmap.h dependency in analyzer/.

              pnmtojpeg: Add -rgb option.

              jpegtopnm: Handle a stream of consecutive JPEGs.

              tifftopnm: use TIFFRGBAImageGet() so it works on compressed
              images.

              'make distclean' deletes all symbolic links, even if I forget
              to put them in HEADERLINKS so that 'make clean' gets them.

02.10.10 BJH  Release 10.10

              Add -plain common option.  Thanks "John H. DuBois III"
              <spcecdt@armory.com>.

              ppmhist: Add -colorname option

              pnmcomp: Add -align=beyondleft, -align=beyondright,
              -valign=above, -valign=below and make -xoff and -yoff work
              in conjunction with -align and -valign.  Idea from 
              "John H. DuBois III" <spcecdt@armory.com>.

              manweb: Add ability to search through PATH for documentation
              so you can just say 'manweb bmptopnm'.

              bmptopnm: fix bug from 10.9: 24 bit truecolor should be
              BGR, not RGB.

              ppmtobmp: fix bug from 10.9: 24 bit truecolor should be
              BGR, not RGB.

              pamarith: Fix bug with mixed depth inputs.
         
              pamarith: Fix bug with -subtract of larger # from smaller.

              pnmstitch: fix bug causing segfault at end.

              pgmtopgm, ppmtoppm: Issue error message if arguments given.

              giftopnm: remove debugging messages.

              Fix line number in color dictionary error messages.

              Fix build errors on systems that don't do "echo -n" by using
              cat /dev/null instead.

              Fix build errors that cause the data files not to get installed.
              
              Merge build: fix install of other/ programs and add NETWORKLD
              to the link.

              Merge build: add missing backward compatibility 'pnmfile' link.

              Add SCO OpenServer to configure dialog.  Thanks
              John H. DuBois III <spcecdt@armory.com>

              Add FreeBSD to the configure dialog.

02.09.21 BJH  Release 10.9

              Add pgmtopgm.

              Add ppmtoppm.

              Add ppmtoterm.  Thanks Ero Carrera <ecarrera@lightforge.com>.

              Add ppmrough.  Thanks Eckard Specht
              <specht@hydra.nat.uni-magdeburg.de>.

              Add rgb.txt

              pnmquant: make it work with pipe input; fix crash due to 
              half-finished work accidentally released a few releases ago.

              bmptopnm: Use way less memory by inverting image while still
              in the BMP raster format (as little as 1 bit per pixel), 
              instead of in the libnetpbm format (96 bits per pixel).

              ppmhist: Reads image into memory one row at a time instead
              of entire image in memory at once.

              ppmshadow: make it work with non-PPM input.

              ppmshadow: Don't run a shell for every Netpbm program.

              xwdtopnm, pnmtoxwd: make them work on 64-bit-long machines.
              
              ppmdither: Fix subscript out of bounds bug which caused
              random intensity values for the most intense pixels (and
              very slightly too-intense values everywhere).

              ppmtobmp: Fix bug in 24 bit truecolor: was writing B, G, R
              but standard appears to be R, G, B (per bmptopnm and xli).

              pamarith: restore pnmarith capability of having one of the
              inputs be depth 1 while the other is not.

              pnmtopclxl: fine tuning of PBM input case.

              remove pnmfile; obsoleted by pamfile.

              ppmfade, ppmshadow: Change #!/bin/perl to #!/usr/bin/perl.

              Add a bunch of missing #include <string.h> and fix scanf type
              mismatches, per gcc 3.2 compiler warnings.

              Add some missing -R options to links.

02.08.16 BJH  Release 10.8
  
              Build: Fix Configure bug with JPEG headers in default path.

              Pnmtopclxl: fix bug with PBM input not multiple of 8 across.

02.08.15 BJH  Release 10.7

              Pnmtopclxl: remove padBytesMultiple attribute, which doesn't
              exist on old printers.

              Pnmtopclxl: fix MediaDestination parameter value.

              Pnmtopclxl: make options parsed by standard Netpbm
              option parser; remove unconventional (and broken)
              --output option.  Fix crash with Standard Input input.
              Check whole length given for option values.

              pnmflip: Add -memsize and -pagesize.  Make other options
              conventional - only one transformation allowed.

              Make 'configure' a Bourne Shell program that calls configure.pl.

              Add pnmstitch.  Thanks Mark Salyzyn <salyzyn@cfl.rr.com>.

              Fix -R stuff to fix Solaris build.
              
              Add lots of consts, remove dead code, with the help of 
              GNU compiler warnings.

02.07.29 BJH  Release 10.6

              Add pnmtopclxl.  Thanks Jochen Karrer
              <cip307@cip.physik.uni-wuerzburg.de>.

              Add pnmstitch code; not working yet.

              pnmmontage: add -data option.  Thanks Ben
              <bem@mad.scientist.com>.

              pnmtotga: put "image ID" in TGA output.

              ppmtotga: Correct name to pnmtotga.

              pnmcomp:  Add -opacity option.

              pbmtog3: Add -nofixedwidth option.  Vladimir Nadvornik
              <nadvornik@suse.cz>

              ppmtopgm: upgrade to handle multi-image PPM file.

              icontopbm: fix bugs with invalid input formats.  Thanks
              Vladimir Nadvornik <nadvornik@suse.cz>

              ppmtompeg: fix crash with logarithmic psearch algorithm and
              non-power-of-2 search range.

              configure: fix use of compiler other than cc.  Thanks
              Ben <bem@mad.scientist.com>.

              Fix Cygwin library build for default DLLVER.

              Fix file handle problem with Configure on old Perl.

              Don't use .defs file/run dlltool (Windows).

02.07.14 BJH  Release 10.5
         
              Make library link on Solaris with GNU Ld work.  Thanks
              Russel Winder <russel@russel.org.uk>.

              Make Configure not depend on File::Temp.

02.07.09 BJH  Release 10.4

              Fix space after -I bug in Makefile.common, lib/Makefile.

              Change a bunch of macros to upper case; avoid name collision
              of round() with math library.

              Configure detects broken gcc, sets -O2.

              Configure detects jpeg headers not in default search path.

02.07.02 BJH  Release 10.3

              Add pamfunc.

              Add pgmabel.  Thanks Volker Schmidt <lefti@voyager.boerde.de>.

              pamslice: add -xmgr option.
                       
              pgmslice: upgrade to pamslice.
         
              pamarith: add -mean option.

              pnmarith: upgrade to pamarith.

              pnmtopng: add -palette option.  Functional copy from
              "Pnmtopng" package.

              pbmtoepsi: Add -dpi option.  Thanks Bill Cheng
              <bill.cheng@acm.org>

              tifftopnm: make -respectfillorder work.

              pnmtopng: fix bugs in handling of text comment files.
              Taken from "Pnmtopng" package.

              pnmtopng: fix -hist option.

              Cygwin build accomodations.  Thanks Charles Wilson 
              <cwilson@ece.gatech.edu>.

              Fix ppmtompeg build failure when JPEGLIB = NONE

              Fix missing -R link options.

02.06.14 BJH  Release 10.2
         
              Works with separate build directory.

              pnmnorm: fix precision error causes whites to become black

              Fix bug: Pbmpage needs math library

02.06.07 BJH  Release 10.1

              ppmmake: add -maxval option

              pgmramp: add -maxval option

              Add pamseq.

              ppmcolors: base on pamseq.

              pnmtotiff: Fix bug in -indexbits.

              Fix runtime library paths for Darwin, Netbsd

              installnetpbm: Fix infinite loop when you refuse manweb.conf.

              installnetpbm: Add mode to mkdir for older Perl.

              installnetpbm: Use BSD option on Cp if not GNU.

02.06.01 BJH  Release 10.0
         
              Man pages replaced by web pages -- either private copies
              or straight from Netpbm Central.  Documentation distributed
              via Worldwide Web, not in the Netpbm source code tarball.

              Reorganize source tree.  Combine 4 Netpbm libraries into 1.
              Make merge build merge ALL programs into one.

              Add pamendian.

              Add pamstack.

              Add pamtohdiff, hdifftopam.
         
              Add pbmtextps.  Thanks James McCann <jmccann@eskimo.com>.

              Add pgmminkowski, pgmmorphconv.  Thanks Luuk van Dijk
              <lvd@mndmttr.nl>

              pnmtotiff: Add -indexbits option to allow fewer than 8 bits
              per sample in apletted image.  Thanks Thomas Henlich.
              <http://sourceforge.net/users/thenlich/>.

              pnmtotiff: put zeroes in unused colormap entries.  Thanks
              Thomas Henlich <http://sourceforge.net/users/thenlich/>.
         
              pbmtext:  Add -lspace option.  Thanks Denis <denism@cyberus.ca>.

              ppmqvga: remove; appears to be obsoleted by Pnmquant.

              pnmtops: remove setpagedevice by default.  Add -setpage option.

              ppmtouil: rename to pamtouil, add transparency.

              pamchannel: Add -tupletype option.

              pstopnm: Add a showpage in case the EPS source doesn't have it.
              Thanks "J. Milgram" <milgram@cgpp.com>.

              pstopnm: Run Ghostscript directly instead of via a shell.
              Some Windows environments don't have a Bourne-compatible shell.

              pnmtotiff: Don't put bogus colormap in grayscale TIFF.
              Thanks Thomas Henlich  <http://sourceforge.net/users/thenlich/>.

              picttoppm, ppmtompeg, rletoppm: fix bug with invalid parameter
              ("b" modes) on popen().

              pnmtopng: fix bug with 'mayscale'.

              pnmnorm: Fix bug with bvalue == 0.  Thanks "Blake, Chris" 
              <chris.blake@windriver.com>

              pnmtopng: restructure palette generation to make it
              easier to read.

              configure: Add --help.

              Add Windows DLL versioning.  Thanks Charles Wilson 
              <cwilson@ece.gatech.edu>.
         
              Add Nstring library, so Netpbm programs can use asprintf(), etc.

02.03.15 BJH  Release 9.25

              Add pamdice.
         
              pnmgamma: add -srgbramp.

              ppmnorm, pgmnorm: replace with pnmnorm

              ppmnorm: Read only a row at a time into memory.
         
              ppmnorm: Add -keephues option.

              pnmtotiff: Add -miniswhite option.

              pnmtopsnr: Read only a row at a time into memory.

              Convert bmptoppm to bmptopnm.

              ppmtopcx: Add -xpos, -ypos options.

              pcxtoppm: Don't require seekable input.

              pcxtoppm: Improve messages; add some PCX header validation.

              ppmtowinicon: Use standard alpha mask (PGM image) instead of
              PPM image (black/not black) for and file.

              pnmpad: Add -width, -height, -halign, -valign options.
              Thanks M. van Beilen <mvb@iradis.org>.

              ppmhist: remove 100,000 color limit.

              pnmnlfilt: works with multi-image streams.  Thanks 
              "Steven M. Schultz" <sms@2BSD.COM>.

              pcxtoppm: Fix bug with negative image position.

              pnmtopsnr: fix unsigned integer bug giving wrong results on PGMs.

              libpnm: fix bug: PAM functions write 16 bit samples wrong.

              Tifftopnm: fix bug: transparency mask all wrong.  Thanks
              Heikki Suonsivu <hsu@bbnetworks.net>.

              Makefile improvements for cross compiling.  Thanks
              "Maciej W. Rozycki" <macro@ds2.pg.gda.pl>.
 
              Allow build with existing JBIG library instead of the
              bundled one.  Thanks "Maciej W. Rozycki"
              <macro@ds2.pg.gda.pl>.

              ppmtompeg Makefile: include -R option where needed.
              Thanks Hans Werner Strube <strube@physik3.gwdg.de>.

              Add BSD/OS to configure program.  
              Thanks seebs@plethora.net (Peter Seebach)

              install uses supplied install.sh instead of an 'install program
              it finds on your system.

              configure: Fix missing newline bug for IRIX.

02.01.27 BJH  Release 9.24

              Add ppmsvgalib.
              
              pnmremap: Use full color resolution of input instead of that
              of color map to do Floyd-Steinberg dithering.
         
              pnmremap: fix bug where Floyd-Steinberg dithering of very 
              dark areas creates spots of maximal brightness.

              ppmquant: fix same bug as pnmremap.

              pnmscale: add -nomix option

              rawtopgm: fix bug.  Thanks Joe Krahn <krahn@niehs.nih.gov>.
              
              pnmquant: replace with a Perl program that calls
              pnmcolormap and pnmremap.

              Fix bug: PAM library routines fail to read 2-byte samples.
         
              fix bug: install-dev doesn't install mappam.h.

              configure sets up install paths.

              make install does Ldconfig where required.
         
              pnmtops: Add "XxY" form of -dpi option.  Thanks Vladimir 
              Nadvornik <nadvornik@suse.cz>

              ppmtomap: rewrite to call the new pnmcolormap.

              pnmscale: clean up code a little; now it appears to produce
              somewhat better results -- don't know why.

              exif.h: remove C++ comments

              various fixes to please Irix compiler.

              Change some "long" to "uint32n" so it works on 64 bit 
              machines.

02.01.04 BJH  Release 9.23

              tifftopnm: fix bug from 9.22: always crashes.

              xpmtoppm: fix bug from 9.21: XPM 3 files not recognized because
              /* XPM */ comment read twice.
                         
              xwdtopnm: Use bitmap_pad instead of bitmap_unit on X11 pixmap
              files with depth > 1.  Thanks "Ben Kelley" <ben_kelley@ubsw.com>.

              pnmtopalm: fix bug: crashes with -colormap and non-color input.

              ppmforge: fix bug: array subscripts out of bounds.  Thanks
              Rob Menke <robmenke@mac.com>.

              giftopnm: fix bug with extraneous "bogus character 0x00" message

              tifftopnm: add -respectfillorder option.  Ignore FILLORDER
              by default.

              make install-dev: install shared library stub files (symlinks).
              
              ppmtogif: Fix bug: color resolution in wrong bits in logical
              screen descriptor.  Thanks Elmue <elmue@gmx.de>.

              Add -lz to Tiff programs; libtiff requires it now.

              Add ppmcolors.

              Add pnmremap.

              Add pnmcolormap.

              pnmtops: Include setpagedevice directive in Postscript output.
              Thanks A Braunsdorf <ab@eas.purdue.edu>.

              pnmtops: turn-to-fit logic works properly where paper is 
              wider than tall.  Thanks A Braunsdorf <ab@eas.purdue.edu>.

              giftopnm: cleanup
         
01.12.10 BJH  Release 9.22

              Fix bug: pnm_luminosity_factor must be "extern" in pam.h

              pbmtonokia: can create picture messages.  -txt, -net options.

              tifftopnm: Accept invalid FILLORDER value - assume msb-to-lsb.

01.12.01 BJH  Release 9.21

              Add pamdeinterlace.

              Add pnmquant.

              pnmtops: Accept maxval > 255 input.
         
              Rename pnminterp to the more informative pnmstretch.

              pnmstretch: convert from pnm to pam - pamstretch.

              pamstretch: add -xscale, -yscale options

              pbmtolj: Add -copies option

              ppmtogif: Add secret -h option to make Latex2html configure
              program work.

              ppmquant: output maxval controlled by colormap maxval,
              not input maxval.

              pbmclean: Add -black and -white options.  Thanks
              Michael Sternberg <sternberg@phys.uni-paderborn.de>.

              xpmtoppm: Don't require input to start with a comment.
              Thanks MINAMI <minami@chem.s.u-tokyo.ac.jp>.

              xpmtoppm: Fix bug introduced with 9.20 with XPM 1 files.

              pnmcut, pamcut: fix bug with cut that begins past right edge
              of image.
         
              pamcut: Same fix as in pnmcut in 9.9.  Also fix black fill.  

              pnmtotiff:  Process one row at a time instead of reading
              entire image into memory.  Add -color, -truecolor.

01.10.05 BJH  Release 9.20

              ppmtogif: Add -nolzw option.

              ppmntsc: do multiple images

              pnmtojpeg: fix bug from 9.19 causing crash on most images.

              ilbmtoppm: Correct cmyk -> rgb transformation.

              ppmtompeg: Fix bug due to missing "breaks".  Thanks
              Wolfgang Mueller <muellerw@pc7143.unige.ch>    

              eyuvtoppm: fix memory leak, speed up by allocating working
              storage only once.

              libopt.c: replace strtok_r() with strtok() so it compiles on
              Mac OS X.
         
01.09.18 BJH  Release 9.19

              pnmtotiff: fix bug from 9.17 causing compile to fail
              with old Tiff library

              pnmtojpeg: Add -exif option.

              ppmtojpeg: Change to pnmtojpeg; PBM/PGM input causes grayscale
              output.

              pnmtotiff: Handle LSB2MSB FILLORDER.

              pnmtotiff: Fix -msb2lsb, -lsb2msb.  Used to do nothing but 
              set FILLORDER tag value.

              Make maxval of a PBM image read as a PGM image 255 instead of 1.
              
              libpbm: eliminate external data symbol pm_show_version
              so it works with Windows.

              Use subplatform-specific prefixes on Windows shared libraries.
              Thanks Charles Wilson <cwilson@ece.gatech.edu>.

01.09.04 BJH  Release 9.18

              Fix bug from 9.17: -lm now needed in jpegtopnm link.

              jpegtopnm: Add -dumpexif and -exif options.

              pnmtotiff: Fix bug: 16 bit samples byte-swapped on little-
              endian machines.

              Remove C++ comments from exif.c

01.09.03 BJH  Release 9.17

              Add ppmtoneo, neotoppm.  Thanks Teemu Hukkanen <tjhukkan@iki.fi>.

              pnmtotiff:  Add -flate, -adobeflate.  Thanks Peter Creath.

              pnmindex: Fix bug with -size option.  Thanks 
              André Majorel <amajorel@teaser.fr>

              pnmflip: Fix memory leak, plus make special case for PBM
              images that uses 12 times less memory.  Thanks
              Stefan Roellin <stefan.roellin@switzerland.org>.
          
              tifftopnm: Fix incorrect interpretation of FILLORDER tag
              causing incorrect output with 16 bit samples and
              FILLORDER not msb2lsb.  Thanks Don Reid
              <donr@cvs.agilent.com>.

              tifftopnm: Fix PHOTOMETRIC_MIN_IS_WHITE case.
              Thanks Don Reid <donr@cvs.agilent.com>.

              giftopnm: Fix bug with malformed GIFs that end prematurely.

              pbmtonokia: Convert C++ style comments to C style so Sun C
              compiler can handle them.  Thanks Jon Parise <jon@csh.rit.edu>.

              Install development package (header files, static libraries)
              by default.  Add ability to build both static and shared
              libraries.

              Add merge/nonmerge to Makefile.config/configure, in place
              of special make targets.

              Fix Mac OSX build for gcc 3.0.  Thanks m-sekino@mb.kcom.ne.jp 
              (Masanori Sekino)

              Fix make install.hdr.  Thanks m-sekino@mb.kcom.ne.jp 
              (Masanori Sekino)

01.07.24 BJH  Release 9.16

              Builds on Darwin/Mac OS.  Thanks m-sekino@mb.kcom.ne.jp 
              (Masanori Sekino)

              Add pbmtopsg3.  (Postscript G3 fax) Thanks Kristof Koehler 
              <kristof@fachschaft.physik.uni-karlsruhe.de>

              Add pbmtonokia.  Thanks Tim.Ruehsen@OpenMediaSystem.de.

              Add ppmrainbow.  Thanks Arjen Bax <arjen.bax@cmg.nl>.

              Add pamoil, as replacement for pgmoil.  Based on ppmoil by
              Chris <cesheppa@midnightsun.uwaterloo.ca>.

              ppmtogif:  Add -alpha option.

              ppmtojpeg: fix bug: option takes as input filename.

              xpmtoppm: fix bug: Bogus EOF failure.  Thanks 
              "Dr. Larry Pyeatt" <pyeatt@redwood.cs.ttu.edu>.
              
              pnmtopng/pngtopnm: update to Release 2.37.5 of the pnmtopng
              package.  Make -transparent option work like ppmtogif --
              you can add an "=" before the color to specify "exact".
              fix bug with background color and maxval = 65535.  Fix a 
              raft of bugs in pnmtopng from Netpbm 9.15.

              Remove Tiff library from the package.

              Proper naming of AIX and HP-UX shared libraries.

              giftopnm: Add color index to transparency message.

              Add some -R link options in make files.

              ppm3d: fix bug: ignores offset argument.

              tifftopnm: fix bug: shifted right one pixel.
         
              pnmshear: remove sscanf so it works better with Cygwin,
              convert to shhopt, clean up.

              pgmcrater: Remove black vertical line at right
              edge. Make craters wrap around the image (enables tiling
              of image).  Thanks Arjen Bax.
              
              pgmtopbm: remove sscanf so it works better with Cygwin.
              Thanks Arjen Bax.

              Treat all white space, including DOS carriage returns,    
              in color name db file as white space;  Thanks Arjen Bax.

01.06.24 BJH  Release 9.15

              Change format specs to state that sample values are
              nonlinear instead of linear.

              pnmtopalm/palmtopnm: Handle PalmOS 4.0 16 bit direct
              color format.  Thanks  Bill Janssen  <janssen@parc.xerox.com>.

              pnmgamma: Add CIE Rec 709 gamma correction option.

              pnmgamma: Add -ungamma option
              
              ppmcie: Add -rec709 color system option as default so
              that it produces true PPM output (per the new spec) and
              carefully document what the program generates.
              
              ppmcie (work done by Andrew Hamilton
              <Andrew.Hamilton@colorado.edu> in May 1999 but not
              distributed):

                 1. Corrected the XYZ -> RGB transformation;
                 2. Eliminated the -interpwp option, a fudge which had been
                    necessitated by the incorrect XYZ -> RGB transformation;
                 3. Added a Gamma correction, missing in the original;
                 4. Added the option to plot u' v' chromaticity instead of x y;
                 5. Added options to suppress labels and/or axes.

              pnmscale, pnmscalefixed:  Fix bug with unwanted -verbose
              behavior.

              pnmscale, pnmscalefixed: Add -reduce option.  Thanks
              Christopher W. Boyd <cboyd@pobox.com>

              ppmtoeyuv: Speed up by not freeing/reallocating storage for
              each image.  Thanks "Steven M. Schultz" <sms@moe.2bsd.com>

              ppmtoeyuv: Fix memory leak.

              Eliminate pgm_pbmmaxval, ppm_pbmmaxval, and pnm_pbmmaxval
              from libpgm, libppm, and libpnm.  'maxval' argument to 
              pgm_readpgmrow() and ppm_readppmrow() already accomplishes
              this.  pnm_readpnmrow() changed to do same.  external data
              symbols like this do not work with Mingw.
         
              various changes to accomodate Mingw (native Windows)
              and DLLs with Cygwin (Windows).

              eyuvtoppm: rewrite.  Uses Netpbm libraries now.

              pstopnm: Remove gratuitous 5% margin.  Add -equalpixels,
              -imageheight, and -imagewidth options.

              pnmtopng: Read only one row at a time, not the whole image,
              into memory.  Do multiple passes through the (hopefully
              fully cached) file.  This saves memory because pnmtopng's
              internal format may use 96 times as much space per pixel 
              as the file.

              libpbm: Add pm_openr_seekable(), pm_seek(), pm_tell().

              libppm: Add ppm_computecolorhash2(), ppm_computecolorhist2().

              configure: fix bug with Solaris/Sun compiler.

              Split pbmplus.h into pm_config.h and pbm/pm.h to prepare
              for automatic generation of pm_config.h.  Move pm_*()
              subroutines from libpbm1.c to new libpm.c for clarity.

              Remove malloc.h from 411toppm.  malloc is included by
              pm_config.h, in platform-dependent way.

01.05.13 BJH  Release 9.14

              fix bug in shhopt causing wild branches.

              winicontoppm: Make alpha mask ("and") output PBM instead
              of PPM; correct sense so white is opaque, black transparent.

              ppmtoxpm: Add --alphamask option.  Remove 256 color limit.
         
              xpmtoppm: Add --alphaout option
         
              ppmtogif: Add "=" to -transparent option to specify exact
              color.

              configure: change /bin/perl to /usr/bin/perl.  Red Hat Linux
              doesn't have /bin/perl.

              pnm/Makefile: correct bugs in link.  Thanks J Scott Berg 
              <jsberg@bnl.gov>

              Make it build on Unixware.

              Make it build on OpenBSD.

              document color indexing and histogram functions.

01.04.22 BJH  Release 9.13

              ppmtogif: fix divide by zero

              move much of README file into a new master man page, netpbm.1.

              pnmcomp: add -align and -valign options.
              
              Add thinkjettopbm.  Thanks Eric Norum <eric.norum@usask.ca>.

              Builds with Sun compiler.

01.03.25 BJH  Release 9.12

              Add 411toppm.  Thanks Steve Allen <sla@alumni.caltech.edu>.

              pnmcrop:  add -sides option (does what was default
              behavior until July 2000)

              ppmtoeyuv: Use netpbm libraries, deal with multi-image
              input.

              Add color row color map and Floyd-Steinberg functions from
              ilbm package to libppm.

              ilbmtoppm, ppmtoilbm: replace with Ingo Wilken's version from
              April 13, 1995.

              jpegtopnm: fix crash with B&W JPEG input.

              pnmcomp: fix bug: invalid output image when overlay image
              is "higher" format than underlying image.

              ppmchange: fix bug: wouldn't work with maxval != 255.

              pnmtojbig: fix bug: it always says invalid maxval. 
              Thanks Bill Davidsen.

              pbmtext: fix bug: output is sometimes "not implemented"
              because of uninitialized variable.

              pnmpsnr: rewritten so as not to use Fiasco library.
              Correctly handles maxval != 255.  Works with PAM.

              Add IRIX to the configure program.  Thanks Neil Franklin 
              <franklin@arch.ethz.ch>.

              make files: add ZLIB_DIR and ZHDR_DIR variables to
              Makefile.config.  Thanks Bill Janssen.  
              <janssen@parc.xerox.com>

              pcdindex: convert from csh to sh.  Thanks Steve McIntyre.

01.02.20 BJH  Release 9.11

              pnmtopalm: Handle 16 bit direct color format.

              pnmtotiff: Add -xresolution and -yresolution options.
              Thanks Tim Ruehsen.

              Add error message to GNUMakefile for when GNU Make is too old.

              pnmpsnr: fix bug: PGM files always compared equal.

              libpbm: improve --version to reflect that libraries are
              usually dynamically linked now, so it's the version of
              libpbm, not the program itself.

              pbmtext: add -space option.

              asciitopgm: fix crash due to memcpy that should be memset.
              Thanks Philipp Knirsch <pknirsch@redhat.com>.

              pktopbm: fix numerous bugs.  Copied from Red Hat.  By
              jcn <janneke@gnu.org> 1998.09.22.

              pstopnm.csh: fix bomb when xres=yres.  This program is
              obsolete (use pstopnm.c instead), but the patch was free,
              so why not?  Copied from Red Hat.  By Nalin Dahyabhai
              <nalin@redhat.com> 2000.02.14.

              pnmtotiff: Make photometric for G3/G4 fax MINISWHITE 
              instead of MINISBLACK.  Add -minisblack option.  Thanks
              Eric Smith <eric@brouhaha.com>.

              libppm/ppm_parsecolor: fix rounding error for very small
              maxvals (e.g. PBM files -- maxval = 1).
         
              pnmtopalm, palmtopnm: minor updates
              
              bmptoppm: handle BMPs that use ColorsUsed instead of
              bits per pixel to determine color map size.

              bmptoppm: add -verbose option.

              ppmquant: fix bug with maxval > 255 causing arithmetic
              overflow and arbitrary colors in output.

01.01.10 BJH  Release 9.10

              giftopnm: add -alphaout.

              ppmchange: Add -remainder option.

              Add pnmtopalm, palmtopnm.  Thanks Bill Janssen 
              <bill@janssen.org>.

              Add pnmmontage.  Thanks Ben Olmstead <bem@mad.scientist.com>.

              ppmtogif: Add -comment option.

              ppmtogif: fix bug: created GIF89 when it should have created
              GIF87.

              giftopnm: fix bug in displaying of comment extensions.

              jpegtopnm: Add -comments option.

              ppmtojpeg: Add -comment option.

              ppmtompeg: fix crash.  Thanks  Roger Southwick 
              <rogers@mediaforte.com>

              More work on separating source and build directories.
              GNU Make 3.77 or better now required.

00.11.20 BJH  Release 9.9

              add ppmtolj: color HP Laserjet graphics (PCL).  Thanks
              Jonathan.Melvin@heywood.co.uk.

              ppmfade: add -mix option.

              ppmhist: add -noheader option.

              rawtopgm: Add --bpp, --maxval, and --littleendian options.

              pnmindex: Add -noquant, -title options.

              pnmtotiff: create 16 bits-per-sample Tiff files when 
              maxval > 255 instead of crash.

              tifftopnm: handle 16 bits-per-sample Tiff files.

              pnmscale: Use floating point arithmetic instead of 12 bit
              fixed point to reduce distortion at right and bottom edge of
              large images with weird scaling factors.  Add pnmscalefixed,
              which is the old fixed point pnmscale, which goes faster.  But
              also fix bug in the fixed point version so the distortion 
              isn't as bad.  Add -verbose option.

              pnmcut: fix bug: right edge wrong or subscript out of bounds.
              Thanks MURAKAMI Masahiko <muramasa@np.catv.ne.jp>,
              Sven Over <sven.over@web.de>, Frederic Vivien 
              <vivien@lcs.mit.edu>, Pete Weisz <pete@pw34.resnet.cornell.edu>.

              xpmtoppm: fix reading of 4-character color codes; handles
              "NONE" color (transparent background); add -v.  Thanks
              Martin Vermeer <martin.vermeer@hut.fi>.

              ppm/Makefile: fix bug: ppmtompeg, hpcdtoppm not installed.
              Thanks Mike Castle <dalgoda@ix.netcom.com>.

              ppmpspread: fix bug: invalid memory reference crash.  Thanks
              digger <jfk666@poczta.onet.pl>, john joseph iii casey 
              <jjcasey@midway.uchicago.edu>.

              ppmchange: fix bug: every other argument pair ignored.
              Thanks Sven Over <sven.over@web.de>.

              Fix error message in pXmmerge (no pm_error()).  Thanks
              Pete Weisz <pete@pw34.resnet.cornell.edu>, 
              <g031w503@soft.iwate-pu.ac.jp>

              libppm: add /usr/X11R6/lib/X11/rgb.txt as default rgb.txt file.
              Thanks ceder@lysator.liu.se (Per Cederqvist).

              Replace hpcdtoppm version 0.3 (1992) with 0.6 (1994).  Add
              pcdindex.

              Build fixes for Tru64.  Thanks Phil Benchoff <benchoff@vt.edu>.

              Makefile.config: option to not strip binaries on install.

00.09.01 BJH  Release 9.8

              jpegtopnm: Add -adobe, -notadobe options.

              ppmchange:  Add -closeness.

              giftopnm: report transparency information.

              jpegtopnm: Accept single-hyphen options.

              Make it build on DJGPP.

00.08.12 BJH  Release 9.7

              Add PAM format, Pamchannel, Pamtopnm.

              sgitopnm: add -channel option to access more than 3 channels.
              Thanks Smarasderagd.
         
              pnmcut: Add -pad option

              ppmtobmp: change default from -os2 to -windows.

              pnmcut: fix bug: height argument misinterpreted.

              ppmquantall: fix bug: don't crop white borders off images

              yuvtoppm: fix bugs: don't depend on bigendian representation
              of integers.  reject odd-width images.

              ppmtoyuv: fix bug: reject odd-width images.

              anytopnm: fix bug: required nonstandard shell feature.

              giftopnm: fix bug: when image consists of two gray colors,
              program converted them to black or white and created PBM
              file.  Thanks Smarasderagd.  Also fix memory leak.

              Make changes since 9.2 build on Cygwin.

00.07.12 BJH  Release 9.6

              Add pnmtofiasco, fiascotopnm, psnpsnr.  Thanks to Ullrich
              Hafner.

              Make Pnmcrop use a temporary file instead of huge amounts
              of memory.

              bmptoppm: fix crash when OS/2 BMP file has > 8 bits per pixel.

              anytopnm: fix bug (from 9.0) wherein program almost
              always crashed.  Add gzip, bzip, bzip2 capability.
              Thanks Charles Howes.

              parallel.c: Work around SunOS libc problem.

              Define some newer libtiff macros so it compiles against
              older libtiff.

00.07.01 BJH  Release 9.5

              Extend formats to allow multiple images per file.  Add
              -allimages option to pnmfile.  Add pnmsplit.  Extend
              pnmtops.

              Add pbmtowbmp, wbmptopbm.  Thanks Terje Sannum.

              ppmtobmp: Add 24 bit (truecolor) capability.  Remove Release 8.3
              colormap size update.

              pnmcut: easier, more expressive syntax for specifying what
              to cut.

              pnminterp: handle maxval != 255, convert to use Netpbm
              libraries.

              Translate pstopnm from Csh to C, eliminate dependency
              on the 'bc' program.

              Fix bug in tiff library build which caused null soname.

              Add optParseopt2() to shhopt.a so you can use long options
              with one hyphen instead of two.

              giftopnm: fix bug with variable used before set.  Fix bug
              (coding error -- 0=>i).  Unknown impact.

              bmptoppm: fix bug with 24 bit (truecolor) Windows BMPs.

              xwdtopnm: fix one more bug with bits_per_item <> bits_per_pixel.

              Fix ppmtompeg build bug with static libraries.

              Make build clean with gcc -ansi (albeit with some files
              that need extensions declaring the _BSD_SOURCE etc.).

00.06.04 BJH  Release 9.4

              Rebase pnmtopng, pngtopnm on Pnmtopng 2.37.4.

              pbmtolj: fix bug where blank lines get discarded.  Thanks
              Charles Howes.

              ppmtompeg: fix bug with "PNM" format files with maxval != 255.
              Get rid of built-in PPM file parsing.

              Fix 'make install' where mkinstalldirs is not found.

              Fix bug where rle_global.c would not compile with GNU C 
              Library 2.

00.06.01 BJH  Release 9.3

              pnmfile: check for file size error.

              ppmhist: handle larger maxvals, image sizes

              xwdtopnm: Use color map with DirectColor to fix wrong color
              bug on some DirectColor xwds.

              xwdtopnm: Correct bug with 24/32 DirectColor LSBfirst xwds.

              Add pXmcheck() library function.

              Add leaftoppm and ppmtoleaf.  Thanks Bill O'Donnell.

              Add winicontoppm and ppmtowinicon.  Thanks Lee Benfield 
              <lee@benf.org>.

              Add pgmslice.  Thanks to Jos Dingjan.
              
              Include subset of RLE library in the package.

              stamp-date doesn't rely on whoami.

              Make file fixes to accomodate more install programs.
         
              Replace tmpnam() with mkstemp().

              Add pXm_init() into all programs that didn't have it.

00.05.15 BJH  Release 9.2

              Shared libraries now build properly for Solaris, SunOS, NetBSD.

              Add jbigtopnm, pnmtojbig.  Thanks to Markus Kuhn.

              Add pnminterp, pnminterp-gen by Russell Marks.

              Add pbm_writepbmrow_packed() and pbm_readpbmrow_packed() to
              libpbm.

              ppmdither: fix bug with input maxval != 255.  Make output
              maxval the LCM of the requested numbers of primary levels.

              xwdtopnm: works with files where there aren't an integeral
              number of pixels per storage unit (e.g. 24 bits per pixel)
              
              Add some missing pXm_init()

              Make pXmmerge source code automatically generated.

00.05.06 BJH  Release 9.1

              Add pbmtoppa (renamed from pbm2ppa, renamed from print-pbm).
              Thanks Tim Norman.

              Add pbmpage.  Thanks Tim Norman.

              Add pbmtomda, mdatopbm.  Thanks John Elliott.

              Replace gemtopbm with gemtopnm.  Thanks to John Elliott.

              Add ppmntsc: change colors to those acceptable for ntsc or pal.

              Rename old ppmntsc to ppmtv.

              pbmtolj: Add compression (-delta, -packbits, -compress) by
              Dave Platt

              Look for both /usr/lib/X11/rgb.txt and /usr/openwin/lib/rgb.txt
              by default.  Improved error messages if file not found.

              pbmtext: renders character codes 0x80-0xff and 0x00-0x1f as
              whatever the font says, rather than always blank.  Thanks
              Helge Oldach.

              Fix bug in parsing of rgb.txt file in ppm_colorname().

              Add optional static library build to make files.

              Fix a bunch of build bugs for Solaris, SunOS.  Still not all 
              the way there.  Thanks Richard Curnow, Philippe Brieu, 
              Benjamin Kuit.

              Make it build on Cygwin.  Thanks Pierre Humblet.

              Use rm -f;ls instead of ls -sf in make files; some systems don't
              have ln -f.
              
00.04.15 BJH  Release 9.0

              Add the 16-bit-per-sample format for maxval > 255.
              Change size of samples in the library interface from 8
              bits to 32 bits.  Library write routines now create the
              new 16 bit format instead of plain format when you
              request a maxval > 255 and not 'forceplain'.  Make all
              programs read the new format, and all programs that
              convert to PNM from a >8 bit input generate it instead
              of failing or normalizing.  Make pnmdepth generate it.

              pnm_readpnminit(), etc. fails if you request a maxval >
              65535 and not 'forceplain'.  It used to generate plain
              format in that case, but you couldn't actually specify    
              a sample value > 255.

              Add pnmtorle and rletopnm from the Army High Performance 
              Computing Research Center.

              add ppmcolormask - creates a mask of areas of a certain 
              color in an image.

              anytopnm: fix infinite loop
              
              pbmtext:  Ignore non-8-bit characters in bdf files instead
              of crashing.

              ppmdither: fix crash with large dithering matrix dimensions.

              Rename ppmtompeg/headers/search.h to motion_search.h to avoid
              possible confusion with the OSF system file search.h
         
              Fix erroneous shhopt.h dependency in build.
              
00.04.03 BJH  Release 8.4

              Add ppmtompeg, adapted from Berkeley's mpeg_encode.
         
              Add eyuvtoppm and ppmtoeyuv, and vidtoppm, from Berkeley
              mpeg tools.

              Add ppmfade, adapted from Wesley C. Barris' pbmfade. 

              Add ability to extract the alpha channel to tifftopnm,
              tgatoppm, and ximtoppm.  (It's already in pngtoppm,
              and still missing from ilbmtoppm).

              pnmtotiff: Change default compression to none, due to
              removal of LZW capability from Tiff library.

              Make merge build use symbolic links instead of hard links.

              Include dependent libraries in the link of the
              libraries.  This is necessary on some systems, and a
              good idea on others.

              Use strerror() instead of sys_errlist[] everywhere.  If
              some systems do not have the former, we need to do some
              work, because strerror() was already used in some
              places.  We do have a report of a BeOS system with no
              sys_errlist[].

00.03.24 BJH  Release 8.3

              Add ppmshadow, by John Walker <http://www.fourmilab.ch/>,
              dated 1997.08.15.

              Add ppmlabel, by John Walker, dated June 1995.

              Add ppmcie by John Walker, dated September 1994.

              Add character drawing routines by John Walker to libppm.

              Add sbigtopgm by John Walker, dated January 1998.

              Handle BMP file color map size parameter in ppmtobmp, bmptoppm.
              Thanks Marc Moorcroft.

              Rewrite make files, fix lots of make install bugs.

00.03.20 BJH  Release 8.2

              Add ppmtojpeg and jpegtopnm.

              Rename pnmnoraw to pnmtoplainpnm.

              Add CMYK capability to tifftopnm.
 
              Major make file rewrite, especially making install work.
              Pnmmerge is no longer the default.  Shared libraries are.
 
              Add pnmtotiffcmyk.  Written by Andrew Cooke  (Jara Software)
              jara@andrewcooke.free-online.co.uk

00.03.02 BJH  Release 8.1

00.03.02 BJH  Add pnmtopng and pngtopnm.  I got these from 
              ftp://ftp.au.netbsd.org/pub/NetBSD/packages/distfiles
              today.  Release 2.37.3.  I added an "unsigned" and
              changed the type of 'scaleval' to quiet compiler warnings.

00.03.01 BJH  Fix xwdtopnm interpretation of 16 bit TrueColor files.
              Thanks to Martin Kroeker, mk@daveg.com.

99.09.23 BJH  Update xbmtopbm to recognize newer xbm format.




CHANGES TO NETPBM THROUGH MARCH 1994
------------------------------------

Functional changes to Netpbm since 13 October 1993.
Minor bug fixes and compatibility fixes are not documented in this file.

PBM

libpbm1.c	strstr() added to libpbm1.c.
libpbm5.c	BDF font support added.
pbmtext		BDF font support added.
pbmto4425	New filter.
pbmtoln03	Command line parsing changed to Pbmplus standard.


PGM

pgmnoise	New filter.


PPM

picttoppm	Updated
ppm3d		New facility.
ppmchange	New filter.
ppmdim		New filter.
ppmflash	New filter.
ppmmix		New filter.
ppmntsc		New filter.
ppmqvga		Option parsing changed to Pbmplus standard.
ppmshift	New filter.
ppmspread	New filter.
ppmtoxpm	Prototypes added.
xpmtoppm	Prototypes added.
ilbmtoppm	Updated.
ppmtoilbm	Updated.


PNM

pnmtoddif	New filter.
pnmhistmap	New facility.
pnmtops		New option (-nocenter) added.


Functional changes to Netpbm since 7 December 1993.
Minor bug fixes and compatibility fixes are not documented in this file.

PGM

asciitopgm	New filter.
fitstopgm	Replaced by fitstopnm.
pgmtofits	Replaced by pnmtofits.
pgmtopbm	Upgraded.
pgmkernel	New filter.

PPM

ppmchange	Upgraded.
xvminitoppm	New filter.

PNM

pnmalias	New filter.
pnmtofits	Replacement for pgmtofits.
fitstopnm	Replacement for fitstopgm.
pnmtosgi	New filter.
sgitopnm	New filter.
pstopnm		New filter.



CHANGES BETWEEN PBMPLUS AND THE ORIGINAL NETPBM
-----------------------------------------------

The following is new in Netpbm (compared to Pbmplus):

PBM

pbmtext		BDF font support added.

pbmto4425	Display on an AT&T 4425 Ascii terminal.

pbmtoascii	A new improved version.

pbmtoln03	Convert to DEC LN03+.

pbmtolps	Fast PostScript creator.

pbmtopk		Conversion to/from a packed (PK) format font.
pktopbm

pbmclean	Flip isolated pixels.

pbmpscale	Enlarge pbm image with edge smoothing.


PGM

asciitopgm	Convert an ascii image into pgm.

pbmtopgm	Convert pbm to pgm by averaging areas.

rawtopgm	Handles input files without specification of the file size,
		assuming the input image is quadratic. It also supports a
		-tb (top bottom flip) option.

bioradtopgm	Conversion utility for files created by Biorad confocal
		microscopes.

spottopgm	Convert SPOT satellite images to pgm.

pgmkernel	Generate a convolution kernel.

pgmnoise	Create a pgm file with random pixels.


PPM

bmptoppm	Conversion to/from windows bitmap format.
ppmtobmp

ppmtogif	Updated version.
giftoppm	Removed (see giftopnm).

ppmtoilbm	Updated version.
ilbmtoppm

picttoppm	Updated version.
ppmtopict

ppmtoxpm	Updated version, which supports xpm version 3.
xpmtoppm

ppmtomap	Extract all colors from a ppm file.

ppmtomitsu	Convert to Mitsubishi S340-10 printer format.

xvminitoppm	Convert an XV thumbnail picture to ppm.

ppmtoyuvsplit	Conversion to/from YUV triplets. (MPEG / JPEG).
yuvsplittoppm

ppm3d		Create a red/blue stereo image.

ppmbrighten	Change image saturation and value on an HSV map.

ppmchange	Change all pixels of one color to another in a portable pixmap

ppmdim		Dim a ppm file down to total blackness.

ppmdist		Simplistic grayscale assignment for machine generated
		color images.

ppmflash	Brighten a picture up to complete white-out

ppmmix		Blend together two portable pixmaps.

ppmnorm		Normalize the contrast in a portable pixmap.

ppmntsc		Make a portable pixmap look like taken from an American TV.

ppmqvga		Eight plane quantization.

ppmshift	Shift lines of a portable pixmap left or right by a random amount.

ppmspread	Displace a portable pixmap's pixels by a random amount.

ppmtopjxl	Convert a ppm file into an HP PaintJet XL PCL file.


PNM

pnmtops		New option (-nocenter) added.

pnmtofits	Replacement for pgmtofits/fitstopgm
fitstopnm

pnmtosgi	Conversion to/from sgi image format.
sgitopnm

pnmtosir	Conversion to/from Solitaire image recorder format.
sirtopnm

giftopnm	Replaces giftoppm. Examines the input image and produces
		a pbm, pgm, or ppm output.

pstopnm		Convert PostScript to pnm. Requires Ghostscript.

zeisstopnm	Conversion utility for files created by Zeiss confocal
		microscopes (the old standard).

pnmalias	Anti aliasing filter.

pnmcomp		Composite two portable anymaps together.

pnmcrop		New options added.

pnmpad		Add borders to anymap.


LIBTIFF

A new release of libtiff is included. Please read its supporting
documentation.


CHANGE LOG FROM PBMPLUS
-----------------------

Changes since the 30oct91 patch version:

    Fixed uninitialized variable in ppmtotga.  (John Walker)
    Added pgmcrater, ppmforge, ppmtoacad, sldtoppm.  (John Walker)
    Slight change to the p?mmerge.c front-ends to allow for main programs
      that return instead of exitting.
    Minor clarifications to the pnmconvol man page.
    Fixed xwdtopnm to read some 16-bit True/Direct files. (David Elliott)
    Fixed uninitialized variables in pnmtotiff.  (Larry Rosenstein, Bayles Holt)
    Added a couple of checks for \r while reading whitespace. (Larry Rosenstein)
    Removed all the BROKENPUTC stuff.  Now we ignore all return values from
      putc(), and check ferror() in pm_close().  Added pm_close() calls to
      many of the filters.
    Fixed pnmdepth to check for too-large newmaxvals.  Improved rounding
      in pnmdepth and PPM_DEPTH macro.  (Tom Lane)
    Minor fix to ppmtouil.  (Mohsen Banan)
    Added new Imakefiles.  (Rainer Klute)

Changes since the 05oct91 X11R5 contrib tape version:

    Fixed minor SysV config error in pbmplus.h.  (Tom Lane)
    Fixed tifftopnm so that BITSPERSAMPLE and SAMPLESPERPIXEL default
      correctly.  Fixed possible bug in tgatoppm line-interleaving code.
      (Arthur David Olson)
    Fixed tifftopnm so that colormapped files are read correctly.
      (PauL Drews, Mike Wade)
    Corrected use of DefaultRGBDatabase / RGB_DB for imake sites.
      (Randal L. Schwartz)
    Bugfix to pnmtops color PostScript in -rle mode.  (Angus Duggan)
    Added auto-turning to pnmtops.
    Added run-length encoding to ppmtotga.
    Space optimization to pgmoil.

Changes since the 27sep91 comp.sources.misc distribution:

    Fixed spelling error in giftoppm.  Fixed ppmrelief to not shrink the
      image by 2 rows and columns.  Minor fix to pgmramp.  Fixed off-by-one
      error in pnmtoxwd.  Man page fix for pnmgamma.  (Arthur David Olson)
    Converted ANSI trigraphs in ppmtosixel into good old octal.  (Jeff Glover)
    Fix to 24/32 bit case in rasttopnm.  (Behr de Ruiter)
    Float/double portability fix to libppm4.  (Bruce Holmer, Ronald Khoo)
    Fixed typo in compat.ksh.  (Larry Virden)
    Fixed int/short incompatibility in tifftopnm.  (Salik Rafiq)

Changes during the extended beta test period, starting on 15jan91:

    Lots of fixes from: Anthony A. Datri, Arthur David Olson, David Brooks,
      David Elliott, Doug Claar, Duncan Sinclair, Francois Pinard, Gerard
      Leurs, Jim Hanko, Ken Laprade, Klaus U. Schallhorn, Markus Bolz, Mike
      Hench, Philip Gladstone, R C Smith, Selden E. Ball, Jr., Stephen Uitti,
      Steve Allen, Tom Lane, update.kpj-jaakkola@athena.dsv.su.se,
      Charles Karney, Unmesh Agarwala, Ed Pendzik, Juha Sarlin, Tom Tulinsky,
      Phillip Smith, Lai-King Mau, David Koblas, Mark Donovan.
    Added a global -version flag.
    Added bunches of statics and prototypes.  Now compiles with zero
      warnings under gcc -ansi -pedantic.
    Changed #ifdef __STDC__ to #if __STDC__, since some non-compliant
      compilers define it as 0.
    Changed pm_message and pm_error to be varargs routines.  Added a
      portable version of vfprintf for those systems which don't have it.
    Removed the option of not compiling the pgm and ppm parts.  Very few
      people used it, and it added amazing complexity to the pnm programs,
      turning them into maintenance nightmares.
    Merged pbmpaste into pnmpaste.
    Merged pgmtops and ppmtops into pnmtops.
    Added auto-scaling and dpi / page size flags to pnmtops.
    Changed the interpretation of bits in pbmlife to conform with other
      tools.
    Changed xwdtopnm to ignore the pixel number in the xwd color structure.
    Added a -pseudodepth flag to pnmtoxwd.
    Updated tifftopnm for libtiff 2.4.
    Added many option flags to pnmtotiff.  (J.T. Conklin)
    Added support for X11R5's new color specifiers rgb: and rgbi:.
    Added pgmtexture.  (James Darrell McCauley)
    Added ppmtopj, pjtoppm, and ppmdither.  (Christos Zoulas)
    Added ppmtotga.  (Mark Shand)
    Added ppmtosixel.  (Rick Vinci)
    Added pbmtoatk and atktopbm.  (Bill Janssen)
    Added ppmtoyuv and yuvtoppm.  (Marc Boucher)
    Fixes to picttoppm.  (George Phillips)
    Added 24-bit support to ilbmtoppm.  (Mark Thompson)

Changes since the X.V11R4 / comp.sources.misc distribution of 22nov89:

    Added pgmramp, pgmedge, pgmtoppm, rgb3toppm, ppmtoxpm, pnmgamma,
      ximtoppm, pgmtofs, picttoppm, ppmtopict, ppmquantall, anytopnm,
      pi1toppm, ppmtopi1, sputoppm, spctoppm, pbmto10x, ppmtoicr, ppmmake,
      xpmtoppm, ppmtopuzz, ppmtouil, ybmtopbm, pbmtoybm, lispmtopgm,
      pgmtolispm, pbmtogem, pi3topbm, pbmtopi3, pbmtoepson, pbmtoplot,
      pbmtozinc, pbmtext, pnmnoraw, pnmmargin, pnmfile, pnmindex,
      ppmtorgb3, gouldtoppm, pgmbentley, pgmoil, ppmrelief, pnmtotiff,
      ppmtopcx.
    Merged some filters:
      rasttopbm and rasttoppm into rasttopnm;
      pbmtorast and ppmtorast into pnmtorast;
      xwdtopbm and xwdtoppm into xwdtopnm;
      pbmtoxwd and ppmtoxwd into pnmtoxwd.
    Promoted some filters:
      pcxtopbm to pcxtoppm;
      ppmarith to pnmarith;
      ppmconvol to pnmconvol;
      ppmcscale to pnmdepth;
      ppmrotate to pnmrotate;
      ppmscale to pnmscale;
      ppmshear to pnmshear;
      ppmsmooth to pnmsmooth;
      tifftopgm to tifftopnm - new version based on Sam Leffler's libtiff.
    Bugfixes to pbmtoicon, ppmtops.
    The Makefiles now have a "merge" option.
    All flags are now case-insensitive.
    Added $(MAKE) stuff to Makefile.
    Changed pnmsmooth from a csh script to a sh script.
    Made macro use in pbmtox10bm and pbmtoxbm more portable.
    Moved compataliases to compat.csh, and added compat.ksh.
    Made ppmtoilbm less Amiga-specific.
    Added -headerskip and -rowskip flags to rawtopgm.
    Enhanced rasttopnm to interpret 8-bit rasters with no colormap as grayscale.
    Changed sscanf %g to %f - some systems can't handle %g on input.
    Added -expand flag to pbmmask.
    Speedup to pnmflip - don't buffer if possible.
    Added color-name-to-value routine to ppm - uses X11's rgb.txt if present.
    Updated Imakefile support to reflect X.V11R4.
    Removed picttopbm.
    Improved pnmcut argument syntax so that negative coords work like pnmpaste.
    Added "magic" file, for use with the "file" program.
    40% speedup for pgmnorm from Robert Stockton (rgs@cs.cmu.edu).
    Fixed long-standing bug involving colormaps on SPARCstations when
      compiled with gcc -- had to do with passing structs by value.
    Removed the -x flag from pnmtorast -- it's not really needed.
    Fixed subtle bug in the pnm reading code that caused pnmcat to blow
      it on images that differed greatly in width or height.
    New version of giftoppm that handles the GIF89a standard, and doesn't
      use fseek.
    Fixed fitstopgm to handle three-axis images, such as the Hubble pix.
    Xwdtopnm and pnmtoxwd finally handle byte-order properly.
    Added -xysize flag to pnmscale.
    Added conditional ANSI function prototypes to library routines.
    Added -noantialias flag to pnmrotate and pnmshear.
    Removed the TIPS file.  No one ever sent in any new tips, so I just
      moved the few I had into the relevant man pages.  That's probably
      where they belonged in the first place.
    Added justification flags to pnmcat.
    Added -map flag to ppmquant - user-specifiable colormap.  Also, the
      Floyd-Steinberg error diffusion finally works right.
    Added -map flag to pgmtoppm.
    Added DirectColor support to xwdtopnm and pnmtoxwd.
    Speedup to pgmtolj from Arthur David Olson: avoid sending whitespace.
    Fix to pbmtogo from Bo Thide': 2D compression now works.

Patch 1 to the X.V11R4 / comp.sources.misc distribution of 22nov89:

    Fixed bug in pgmtops -rle.

Changes since the alt.sources distribution of 13sep89:

    Small corrections to ppmtorast, pgmtops.
    Moved pbm/tifftopbm to pgm/tifftopgm - it now handles grayscale TIFF files.
    Fixed tifftopgm to handle non-native byte order.
    Changes to tifftopgm to handle bogus AppleScan TIFF files, to have
      better command syntax, and to use stdio.
    Optimizations to xbmtopbm, pbmtoxbm, and pbmtox10bm, courtesy of
      Juha Sarlin, to make them go about three times as fast.
    Optimization to pgmtops and ppmtops to make them go three times as fast.
    Optimization to pnmcrop.
    Added PBMPLUS_BROKENPUTC defines in pbmplus.h to handle systems (such as
      ULTRIX) which have broken putc() macros.
    Rewrote ppmscale, pnmcat, and pgmhist to operate line-by-line, instead
      of reading in the whole image.
    Rewrote pnmflip to keep only one copy of the image in memory.
    Added pgmtofits, courtesy of Wilson H. Bent, plus bugfixes to fitstopgm
      and a patch to giftoppm to handle black&white GIF files.
    Added picttopbm and rawtopgm.
    Fixes to xwdtoppm and ppmtoxwd so they compile with SunOS cc as well as gcc.
    Another small change to ppmtoxwd having to do with colormap size.
    Changed macptopbm's -headersize flag to be -extraskip.
    Changed tgatoppm to read color values as BGRA instead of ARGB; the Targa
      documentation is apparently wrong about the order.
    Some changes to the Makefiles, partially to work around bugs in gnumake.
    Got g3topbm working, and added pbmtog3, courtesy of Paul Haeberli.
    Added some pixrect work-alike code so that rasttopbm, pbmtorast, rasttoppm,
      and ppmtorast can be used on non-Sun systems.  This also provides a
      final solution to the persistent byte- and bit-order problems on 386's.
    Moved the SYSV-checking #ifdefs to *after* the include of pbm.h, which
      defines SYSV.
    Made all the #else's and #endif's ANSI-compliant.
    Added manual pages for libpbm, libpgm, libppm, and libpnm, courtesy
      of Tony Hansen.
    Changed man page installation so that pages from different sections
      can go in different directories.
    Fixed Imakefiles.

Changes since the expo.lcs.mit.edu FTP distribution of 06sep89:

    Added #ifdefs to pnm/libpnm3.c to allow the PBM-PNM-only configuration.
    Small corrections to TIPS, pnm/Makefile, pnm/Imakefile, ppm/ppmrotate.1,
      ppm/ppmshear.1, ppm/ppmtoilbm.c, pbm/xwdtopbm.c, ppm/xwdtoppm.c,
      ppm/ppmtoxwd.c, ppm/ppmtoxwd.1, pbm/x11wd.h.

Changes since the comp.sources.misc distribution of 31oct88:

    Added pbmreduce, pbmlife, pbmmask, and pbmupc.
    Added gemtopbm, tifftopbm, pcxtopbm, pbmtogo, mgrtopbm, pbmtomgr,
      cmuwmtopbm, pbmtocmuwm, g3topbm, and pbmtobg.
    Minor bugfix to pbmtolj.
    Slight restructuring of most of the programs to use vastly less memory.
    Various other minor optimizations.
    Fixed pbmtorast and rasttopbm to handle byte-swapped big-endian 386 boxes.
    Slight changes to argument syntax of pbmcrop, pbmmake, pbmreduce.
    Moved to the new PGM package: pbmtops (which now produces Conforming PS).
    Moved to the new PPM package: giftopbm.
    Moved to the new PNM package: pbmcrop pbmcut pbmenlarge pbminvert.
    Consolidated into a single pnmflip tool: pbmfliplr pbmfliptb pbmtrnspos.
    Consolidated into a single pnmcat tool: pbmcatlr pbmcattb.
    Added compataliases script for upward compatability with changed tools.
    Removed xxxtopbm.
    Added a -headersize flag to macptopbm, to help get around annoying
      problems in MacPaint file format.
    Added the RAWBITS compilation-time option, to use a more compact and
      much faster (but less portable) external format.
    Removed the CBM format - use compress(1) and / or RAWBITS instead.
    Pbmpaste (and the new pnmpaste) now accepts negative x and y coords,
      which are interpreted relative to the right and bottom sides.
    Changed all programs to accept a "-" file argument as meaning standard
      input.
    Removed pbmtox10wd, since it was never very useful (X10 doesn't have xwud).
    Added Imakefiles, for X11 types to use.

Changes since the X.V11R3 distribution of 31aug88:

    The cbm format has been revised to support run-length encoding.
    Pbmtops now does run-length encoding.

Major changes since the X.V11R2 distribution of 28mar88:

    The pbm format now has a "magic number".
    New conversion filters: brushtopbm, giftopbm, pbmtolj, pbmtomacp,
      pbmtoxwd, and pbmtox10wd.
    Icontopbm converter has a better parser -- it knows to skip over
      any extraneous comments at the beginning of the icon file.
    Pbmtops generates a different PostScript wrapper program -- it should
      handle huge bitmaps better.
    Xwdtopbm now handles byte-swapping correctly.
    Pbmmake takes a flag to specify the color of the new bitmap.
    Pbmpaste now implements 'or', 'and', and 'xor' operations as well
      as the default 'replace'.