added common regex

[wxWidgets.git] / src / xpm / changes

/*
 * Copyright (C) 1989-95 GROUPE BULL
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Except as contained in this notice, the name of GROUPE BULL shall not be
 * used in advertising or otherwise to promote the sale, use or other dealings
 * in this Software without prior written authorization from GROUPE BULL.
 */

/**************************************************************************\
* 									   *
*  			HISTORY of user-visible changes			   *
* 									   *
\**************************************************************************/

3.4k    (98/03/18)

    ENHANCEMENTS:
	- A new program called cxpm is provided to check on XPM files and help
	  figuring out where the file might be invalid.
        - The FAQ and README are now in HTML.

    BUGS CORRECTED:
        - A bug in writing pixmaps out on an 32 bit depth visual and MSBFirst
	  machine.
		- patch from Uwe Langenkamp <Uwe.Langenkamp@t-online.de>
        - A severe bug in parsing the pixels section when an unknown character
	  is encountered.

3.4j	(96/12/31)

    ENHANCEMENTS:
	- The XPM library can now be built under Amiga DOS. This entirely comes
	  from: Lorens Younes <d93-hyo@nada.kth.se>
	  See the README.AMIGA file for details.
	- Changes for MSW: big performance improvement in ParseAndPutPixels(),
		fixed creation of the mask in SetColor()
		- patch from Jan Wielemaker <jan@swi.psy.uva.nl>
	- makefiles are provided for VMS
		- given by Martin P.J. Zinser m.zinser@gsi.de  
	- Imakefiles reworked to get smoother builds and fixes from:
		- Paul DuBois dubois@primate.wisc.edu
		- Larry Schwimmer schwim@cyclone.stanford.edu
	- thanks to some code rearrangement the library is smaller (the size
	  reduction goes from 4 to 7% depending on the system)

    BUGS CORRECTED:
	- A severe bug (introduced in 3.4i as part of the sprintf
	  optimization) in code writing XPM extensions to a buffer
	  XpmCreateBufferFromImage/Pixmap.
	- The XpmAttributes definition in xpm.h was declaring nalloc_colors to
	  be Bool, it's an int.

3.4i	(96/09/13)

    NEW FEATURES:
	- The XPM library now allows the application to pass its own color
	  allocation/free functions. For this matter the following was done:
	  The XpmAttributes structure has three new fields alloc_color,
	  free_color, and color_closure. The following new valuemasks were
	  added XpmAllocColorFunc, XpmFreeColorsFunc, XpmColorClosure. And
	  two new types were defined XpmAllocColorFunc and XpmFreeColorsFunc.
	  See documentation for details.

    ENHANCEMENTS:
	- Windows NT support. It should compile and run fine based on the X
	  Consortium X11R6 distribution.
	- The README file contains information to compile on Solaris with gcc.
	- Part of the code has been optimized by using the value returned by
	  sprintf instead of calling strlen. Add the flag -DVOID_SPRINTF
	  if on your system sprintf returns void.
		  - patch from Thomas Ott thommy@rz.fh-augsburg.de

    BUGS CORRECTED:
	- XpmFree is now a real function (simply calling free by default).

    CHANGES TO THE DOC:
	- The documentation describes the new XpmAttributes fields and their
	  use.

3.4h	(96/02/01)

    NEW FEATURES:
	- The XpmAttributes has a new member called 'alloc_close_colors' which
	  lets the caller specify whether close colors should be allocated
	  using XAllocColor or not. This is especially useful when one uses a
	  private colormap full of read/write cells.
	  The xpm.h header file define a new bitmap flag called
	  XpmAllocCloseColors to use along with this new slot.
		  - Dale Pease peased@bigbird.cso.gtegsc.com
	- The XpmAttributes has a new member called 'bitmap_format' which lets
	  the caller specify the format of 1 bit depth images (XYBitmap or
	  ZPixmap). The xpm.h header file define a new bitmap flag called
	  XpmBitmapFormat to use along with this new field.

    ENHANCEMENTS:
	- XpmReadFileTo[Image/Pixmap], XpmCreate[Image/Pixmap]FromData,
	  XpmCreateImageFromDataFromBuffer functions do no longer use a
	  temporary XpmImage object, which reduces a lot the amount of memory
	  used. On the other hand it can take a little more time, but given the
	  following figures (based on sxpm) it is a real good trade-off.

	  Reading a 22x22 pixmap with 5 colors no time change is detected
	  using time:
		  real        0.3
		  user        0.1
		  sys         0.1

	  Reading a 1279x1023 pixmap with 14 colors (quite extreme case for
	  XPM!) the time goes from:
		  real        1.9
		  user        0.8
		  sys         0.8

	  to:
		  real        2.2
		  user        1.8
		  sys         0.3

	  Reading the 22x22 pixmap with 5 colors the memory usage (under
	  purify) goes from:
		  255256 code
		   55496 data/bss
		  163848 heap (peak use)
		    4248 stack
	  to:
		  271240 code
		   55472 data/bss
		  159752 heap (peak use)
		    4224 stack

	  And reading the 1279x1023 pixmap with 14 colors it goes from:
		  255256 code
		   55496 data/bss
		 6705160 heap (peak use)
		    4280 stack
	  to:
		  271240 code
		   55472 data/bss
		 1732616 heap (peak use)
		    4264 stack

	  This clearly shows that while for small pixmaps there is no real
	  difference on both sides, for large pixmaps this makes a huge
	  difference about the amount of memory used and it is not much
	  slower.

	  Note that you can still get the old behavior using both
	  XpmReadFileToXpmImage and XpmCreate[Image/Pixmap]FromXpmImage instead
	  of XpmReadFileTo[Image/Pixmap]. Once more XPM gives you the choice!

    BUGS CORRECTED:
        - when defined locally the global symbols strcasecmp and strdup are
	  now called xpmstrcasecmp and xpmstrdup to avoid any possible
	  conflict.
	- VMS has a bogus file system which requires a work around in
	  XpmReadFileToBuffer.
		  - patch from Bob.Deen@jpl.nasa.gov
	- the type of the exactColors attribute has been changed from unsigned
	  int to Bool.

    CHANGES TO THE DOC:
	- the documentation describes the new XpmAttributes fields
	  alloc_close_colors and bitmap_format.

3.4g	(95/10/08)

    ENHANCEMENTS:
	- The XpmAttributes structure has now two new slots: alloc_pixels and
	  nalloc_pixels in order to provide an easy way to free allocated
	  colors. The new bitmask XpmReturnAllocPixels should be used to
	  request this data through the valuemask. Unless you really know why,
	  you should use this instead of XpmReturnPixels, pixels, and npixels.
	- the XPM1 format parsing has been improved.
		  - patch from Chuck Thompson <cthomp@cs.uiuc.edu>
	- compilers defining _STDC_ to something different from 1 are now
	  considered as ANSI compilers.
	- the README file provides now more info on how to build XPM depending
	  on the system.

    BUGS CORRECTED:
	- a bug introduced in 3.4f in the XPM1 format parsing function.
		  - fix from Chuck Thompson <cthomp@cs.uiuc.edu>
	- the hashtable was not free when the color parsing failed.
		  - patch from ackley@cs.unm.edu (David Ackley)
	- the close color mechanism wasn't used if one of the closeness
          parameter was null. Now only one needs to be different from 0.
                    Lorens Younes d93-hyo@nada.kth.se
	- parsing of long comments failed with a segmentation fault.

    CHANGES TO THE DOC:
	- the documentation describes the new XpmAttributes fields
	  alloc_pixels and nalloc_pixels and how they are used.

3.4f	(95/05/29)

    ENHANCEMENTS:
    	- Defines IMAKE_DEFINES in the top Imakefile so one can easily avoid
    	  building the shared library.
	- Add some information about the installation process in the README.
	- filenames are surrounded with quotes when calling gzip or compress in
          order to allow spaces within filenames.
		  - William Parn <parn@fgm.com>
	- the compilation and the shared library building should be smoother
	  on Alpha OSF/1.
		  - patch from Dale Moore <Dale.Moore@CS.cmu.edu>

    BUGS CORRECTED:
	- a segmentation fault occurring in some weird case.

3.4e	(95/03/01)

    ENHANCEMENTS:
    	- The top Imakefile passes CDEBUGFLAGS and DEFINES to subdirs. Thus
    	  only this Imakefile should need to be edited by users.
	- FAQ includes the answer to the question "How can I get a non
    	  rectangular icon using XPM ?"
	- VMS support updated
		  - patch from Martin P.J. Zinser m.zinser@gsi.de

    BUGS CORRECTED:
	- XpmCreateImageFromXpmImage() called from XpmReadFileToPixmap() could
	  lead to a segmentation fault since free was called on a memory block
	  size variable instead of the block itself. Note: this bug has been
	  introduced in 3.4d.

3.4d	(95/01/31)

    ENHANCEMENTS:
    	- sxpm now supports a -version option command.

    BUGS CORRECTED:
	- the list of pixels returned in XpmAttributes was wrong when two
	  colors were defined as None in the read XPM
		  - Lionel.Mallet@sophia.inria.fr
	- the parser was skipping whitespace reading extensions strings. This
	  has been fixed so extensions lines are now returned exactly as they
	  are.
	- some compilation control added for the dec alpha with X11R5 (LONG64)
		  - patch from Fredrik Lundh <Fredrik_Lundh@ivab.se>
	- when writing an XPM file, '-' characters are replaced with '_'
	  characters in the array name, in order to get a valid C syntax name.
	- XYPixmap format images were not correctly handled.
	- XPM1 file with names using multiple '_' characters are now handled
	  correctly.
	  	  - todd@erda.rl.af.mil (Todd Gleason)

3.4c	(94/06/06)

    Yes, this is kind of quick. But this is because no code has been modified,
    this is just a new packaging to make the whole stuff more suitable to the
    X development team's requests for inclusion in the R6 contrib.

    ENHANCEMENTS:
	- Several filenames were too long to fit without any conflict on DOS
	  and CD-ROM filesystems. They have been renamed.
	- Imakefiles use XCOMM for comments instead of the # character.
	- the Postscript documentation file doc/xpm.ps is now distributed as
	  doc/xpm.PS.gz and allows browsing with tools such as ghostview.
	- Besides, parts of lib/misc.c have been moved to several new files,
	  and some functions of data.c have been moved to other files in
	  order to get a better link profile.
	- I've also added a FAQ hoping this will prevent people from
	  continuously filling my mailbox with the same questions.
	- sxpm.c includes <X11/xpm.h> instead of "xpm.h" and BUILDINCTOP is
	  used in Makefiles as expected.
	- Everything can be done simply using "xmkmf -a" and "make".

3.4b	(94/05/24)

    ENHANCEMENTS:
	- XPM can now be built under MS Windows. Yes, this is possible and this
	  entirely comes from:
		- Hermann Dunkel <hedu@cul-ipn.uni-kiel.de>
	  See the README.MSW file for details.

	- building the shared library now depends on the SharedLibXpm variable
	  and no longer on the SharedLibX variable which is private to the X
	  Window System project.
		- patch from Stephen Gildea <gildea@x.org>
	  Other variables can now be set for the various locations needed.

	- lib/parse.c does no longer use a 256x256 array in the stack but
	  malloc it instead.

	- The Copyright notice which has been re-written from the X11R6's one
	  should be clearer and is now present in every file.

    BUGS CORRECTED:
	- lib/xpmP.h does no longer define a Boolean type which conflicts with
	  the Intrinsic definition. Instead the type Bool defined in Xlib is
	  used.
		- neumann@watson.ibm.com (Gustaf Neumann)

3.4a	(94/03/29)

    BUGS CORRECTED:
	- passing NULL as shapemask_return to XpmReadFileToPixmap and similar
	  functions was leading to a bus error.
		- Dean Luick <dean@falcon.natinst.com>

3.4	(94/03/14)

    IMPORTANT NOTE:
	This version is not compatible with 3.3. Fortunately most people should
	only need to recompile.
	I apology for this but CDE/Motif have put heavy pressure to go that
	way. The point is that I designed and released Xpm 3.3 in order to let
	OSF include a clean version of Xpm in Motif 2.0. This new version was
	not fully compatible with 3.2 but I thought it didn't matter since this
	was going to be the first version used within Motif. Unfortunately CDE
	was already using xpm-3.2 internally and requires both source and
	binary backward compatibility. By the way I must say they didn't drop
	us a single line to let us know they were using it and thus were
	expecting stability. All this could have been avoided...

	However, since I had to go for a not compatible version I took this as
	an opportunity to modify the lower level API, which was new in 3.3 and
	which was somewhat clumsy, in order to provide yet a better API.

	The library has been modified to have both source and binary backward
	compatibility with xpm-3.2. This implies it is not either source or
	binary compatible with 3.3. The fields related to the 3.2 XpmInfos
	mechanism have been put back into the XpmAttributes structure. The new
	3.3 XpmInfos struct has been renamed as XpmInfo to avoid conflict with
	the old 3.2 flag which is back too. All the semantic related to the
	XpmAttributes infos fields is back as well.

	So this new version provides a high level API which is fully
	compatible with 3.2 and still provides the 3.3 lower level API
	(XpmImage) with the XpmInfos struct renamed as XpmInfo. This leads to
	some redundancy but this was the best I could do to satisfy both
	CDE/Motif people who needed the backward compatibility and myself (who
	always tries to provide you with the best ;-).

	Tests have been successfully performed with pixmap-2.1, pixmap-2.4, and
	sxpm.

    ENHANCEMENTS:
	- The colorTable member of the XpmAttributes structure is now an
	  (XpmColor*) in order to be compatible with an XpmImage colorTable.
	  However in order to be backward compatible this field is cast to
	  (XpmColor **), which is equivalent to (char ***), when it is used
	  with the old flags XpmInfos and XpmReturnInfos. To handle the new
	  type the new flags XpmColorTable and XpmReturnColorTable have been
	  defined.
	- The XpmInfo struct has been extended to avoid having to deal with an
	  XpmAttributes at the lower level. The idea is that all the data
	  stored in an Xpm file can be retrieve through both an XpmImage and
	  an XpmInfo struct. See the documentation for details.
	- XpmUndefPixel is defined and exported by xpm.h in order to let
	  clients providing their own colorTable when writing out an Xpm file.
	  See the documentation for details.
	- in sxpm/sxpm.c, set attribute XtNinput to True on toplevel widget.
	  Windows that don't "take" input, never get focus, as mandated by
	  the ICCM.
        	patch from Henrique Martins <martins@hplhasm.hpl.hp.com>
	- lib/Imakefile modified to build the shared library under IRIX 5.
                patch from simon@lia.di.epfl.ch (Simon Leinen)

    NEW FEATURES:
	- a new function and a new define should help client figuring out with
	  which Xpm library version they are working. These are
	  XpmIncludeVersion and XpmLibraryVersion().

3.3	(93/12/20)

    NEW FEATURES:
	- XPM1 files are now supported.
	- a new function is provided to get an error string related to the
	  returned error code.
		- suggested by Detlef Schmier <detlef@mfr.dec.com>

    ENHANCEMENTS:
	- gzip and gunzip are called with the -q option (quiet)
		- patch from Chris P. Ross <cross@eng.umd.edu>
	- the parser is again more flexible about the way the strings are
	  distributed on lines. Actually a single line XPM file can be read.
	- the documentation should be clearer about shapemask generation and
	  XpmAttributes valuemask.

    BUGS CORRECTED:
	- reading some binary file was leading to a bus error.
		- patch from Detlef Schmier <detlef@mfr.dec.com>
	- the ? character is no longer used when writing an XPM file in order
	  to avoid possible ANSI trigraphs.

3.3alpha (93/08/13)

    NEW FEATURES:
	- a new level interface is provided to allow applications to do either
	  icon editing or data caching.
	  The XpmAttributes has been changed but most applications will just
	  need to be recompiled.
	- new structures are provided to deal with the new lower level:
		 XpmImage, XpmColor, XpmInfos.

	- a separate distribution called xpm-contrib is available. This
	  includes the converters which used to be part of this distribution
	  plus:
		two new applications:
		* nexpm to draw a pixmap in *any* existing window from
			 Ralph Betza <gnohmon@ssiny.com>
		* xpmview to display a list of Xpm files from
			 Jean Michel Leon <leon@sophia.inria.fr>

		a hacky string to pixmap converter, provided by
			Robert H. Forsman Jr.  <thoth@manatee.cis.ufl.edu>

		The Xpm editor called pixmap will also be part of this contrib.
		This does not mean it is the best pixmap editor one can find
		but it is the only one that I know of which tries to handle
		all the features of this format.

    ENHANCEMENTS:
	- the code to build XImage data has been optimized by
		 jules@x.co.uk (Julian Gosnell)
	  the old code is still available when compiling with the
	  -DWITHOUT_SPEEDUPS flag.

	- closecolor code was not re-entrant
		 - dbl@visual.com (David B. Lewis)
	- fix gzip filename (*.gz and no longer *.z).
		 - Jason Patterson <jasonp@fitmail.fit.qut.edu.au>
	- sxpm has 2 new options:
		 -nom to do not display the mask if there is one
		 -cp <color> <pixel> to override a color value with a given
		 pixel, i.e. sxpm plaid.xpm -cp red 4

	  also the '-s' adn '-p' options have been renamed to '-sc' and '-sp'.

	- xpm.h defines XpmFormat, XpmVersion, and XpmRevision numbers.

    BUGS CORRECTED:
	- closecolor minor fix
		 - Jason Patterson <jasonp@fitmail.fit.qut.edu.au>

3.2g	(93/04/26)

    ENHANCEMENTS:
	- much faster close colors
	- piping from/to compressed files now handles GNU's gzip (.z)  format
	- added XpmColorKey attribute - ability to specify which visual's
	  colors to use (ie: now it's possible to read in a pixmap in a
	  color visual, but use the colors specified for monochrome).
	- added -mono, -grey4, -grey and -color options to sxpm to demonstrate
	  the XpmColorKey attribute.
		- Jason Patterson <jasonp@fitmail.qut.edu.au>

    BUGS CORRECTED:
	- fixed bug where redefining "None" as a pixel stopped mask generation
	- minor SVR4 defines for <string.h>
	- fixed annoying closecolor bug related to read/write color cells
	- fixed minor bug in color value -> pixel overloading
	- manual updated to include new red/green/blue closeness attributes
		- Jason Patterson <jasonp@fitmail.qut.edu.au>

	- the top Imakefile was missing the depend target
	- sxpm/Imakefile fixed so that -L../lib is set before the standard
	  library location.
		- Vivek Khera <khera@cs.duke.edu>

	- lib/xpmP.h now defines bcopy as memcpy for VMS (required by recent
	  versions of VMS)
		- J. Daniel Smith <dsmith@ann-arbor.applicon.slb.com>

	- the lib/Imakefile didn't work with X11R4.


3.2f		(93/03/17)

    NEW FEATURES:
	- the library provides four new functions to deal with Xpm files
	  loaded in memory as single character strings buffers:

			XpmCreateImageFromBuffer
			XpmCreatePixmapFromBuffer
			XpmCreateBufferFromImage
			XpmCreateBufferFromPixmap

	- in addition, as a convenience, two functions are provided to copy a
	  file in a buffer and to write a file from a buffer:

			XpmReadFileToBuffer
			XpmWriteFileFromBuffer

    ENHANCEMENTS:
	- Files are now dispatched in the following sub-directories:
	  lib, sxpm, and doc.
	- Imakefiles will let you build a shared library as well as the static
	  one (with either X11R4 or X11R5).
	- The documentation has been ported from LaTeX to FrameMaker and is
	  now included in the distribution in its PostScript form (doc/xpm.ps).
	  Source files are available on request.
	  Also the documentation has been reorganized and includes a table of
	  contents and an index of the functions (the number of functions
	  increasing this became a requisite).

    BUGS CORRECTED:
	- Many warnings have been fixed - patch from Daniel Dardailler 
	  daniel@osf.org

3.2e		(93/02/05)

    ENHANCEMENTS:
	- use XpmMalloc, XpmRealloc, XpmCalloc, and XpmFree which are defines
	in xpmP.h. This should help people wanting to use their own functions.

    BUGS CORRECTED:
	- Intrinsic.h is no longer included.
	- bzero is defined as memset on SYSV and SVR4.
	- some memory initialization bug concerning XpmAttributes.

3.2d		(93/01/27)

    ENHANCEMENTS:
    	- compile on Solaris 2.0
		- patch from Clint Jeffery <cjeffery@cs.arizona.edu>

    BUGS CORRECTED:
	- shape masks are now set correctly for LSBFirst (Decs).
	- pixmaps are now set correctly for 2 bit displays (Nexts).
		- patch from Josef Leherbauer <joe@takeFive.co.at>
	- isspace was called on getc which fails when EOF is returned.
		- Marelli Paolo <marelli@colos3.usr.dsi.unimi.it>

3.2c		(92/12/29)

    ENHANCEMENTS:
    	- parsing optimized for single and double characters color
		- patch originally from Martin Brunecky 
				       marbru@build1.auto-trol.com

    BUGS CORRECTED:
	- XpmFreeExtensions was calling free on some argument without checking
	it was not NULL.
	- strdup was not correctly defined for systems which do not provide
	it.	- Hans-Peter Lichtin <lich@zellweger.ch>
	- some bug in XpmCrDataFI.c
	        - Sven Delmas garfield@avalanche.cs.tu-berlin.de

    NOTE:
    	- there is still a bug with the creation of the clipmask on display of
	depth 2 but I can't find a fix because unfortunately I don't have such
	a rendering system and nobody gets the time to investigate for me.

3.2b		(92/10/19)

    ENHANCEMENTS:
	- Create XpmReadFileToData and XpmWriteFileFromData
		- Dan Greening <dgreen@sti.com>
    	- added "close colors" support and ability to redefine color values
	  as pixels at load time, as well as color names
		- Jason Patterson <jasonp@fitmail.qut.edu.au>
	- errors while parsing or allocating colors now revert to other
	  visual defaults, creating pixmap/image as expected, and returning
	  XpmSuccess. The old behavior of XpmColorError being returned and no
	  pixmap/image being created can be retained by setting the
	  exactColors attribute.
		- Jason Patterson <jasonp@fitmail.qut.edu.au>

    BUGS CORRECTED:
	- SVR4 defines for including <string.h> instead of <strings.h>
		- Jason Patterson <jasonp@fitmail.qut.edu.au>
	- attributes->extensions and attributes->nextensions fields were not 
	  set correctly when no extensions present in file.
		- Simon_Scott Cornish <cornish@ecr.mu.oz.au>

3.2a		(92/08/17)

    ENHANCEMENTS:
    	- use the mock lisp hashing function instead of the gnu emacs one,
	it is faster in some cases and never slower (I've not found any case).

    BUGS CORRECTED:
	- function prototypes for ansi compilers.
	- some memory initialization bugs (purify is just great for this).
	- empty strings in extensions are now correctly handled.

3.2		(92/07/06)

    NEW FEATURES:
	- both format and functions handle extensions data. This allow people
	to store additional data related to a pixmap. See documentation for
	detail.
	- sxpm supports the new option '-c' to use a private colormap. This is
	useful when displaying pixmaps using a lot of colors.
	- sxpm supports the new option '-v' (verbose) to get possible
	extensions print out on standard error.

    ENHANCEMENTS:
    	- most of the code has been reworked to be improved and thus almost
	every function is faster. It takes less than 6 seconds of real time on
	a sun4 to display, with sxpm, a 487x635 pixmap using 213 colors, while
	it takes 32 seconds with the old library! It takes 18 seconds to
	display a 1279x1023 screen dump using 14 colors while xwud takes 10
	seconds.
	Of course performance improvements are not always that great, they
	depend on the size and number of colors but I'm sure everybody will
	appreciate ;-)
	I know how to improve it more but this will require changes in the
	architecture so this is not for now. Some optimizations have been
	contributed by gregor@kafka.saic.com (gregg hanna) and
	jnc@csl.biosci.arizona.edu (John N. Calley).
	- the Imakefile is modified to let you install sxpm - Rainer Klute
           <klute@irb.informatik.uni-dortmund.de>
	- xpmP.h declares popen for Sequent platforms - Clinton Jeffery
	   <cjeffery@cs.arizona.edu>
	- XpmWriteFileFromImage/Pixmap rather than truncating the pixmap name
	to the first dot changes dots to underscores to get a valid C syntax
	name.


    BUGS CORRECTED:
	- there was a bug in the image creation function for some 24 bits
	displays. It is fixed.
	- allocated color pixels are now freed when an error occurs -
	   nusser@dec1.wu-wien.ac.at (Stefan Nusser)

    CHANGES TO THE DOC:
	- the documentation describes the new XpmExtension structure and how
	to use it with read and write functions.

3.1		(92/02/03)

    ENHANCEMENTS:
    	- sxpm now have more standard options (mainly suggested by 
	Rainer Sinkwitz <sinkwitz@ifi.unizh.ch>):

	Usage:  sxpm [options...]
	Where options are:

	[-d host:display]            Display to connect to.
	[-g geom]                    Geometry of window.
	[-hints]                     Set ResizeInc for window.
	[-icon filename]             Set pixmap for iconWindow.
	[-s symbol_name color_name]  Overwrite color defaults.
	[-p symbol_name pixel_value] Overwrite color defaults.
	[-plaid]                     Read the included plaid pixmap.
	[filename]                   Read from file 'filename', and from
				     standard input if 'filename' is '-'.
	[-o filename]                Write to file 'filename', and to standard
				     output if 'filename' is '-'.
	[-nod]                       Don't display in window.
	[-rgb filename]              Search color names in the rgb text file
				     'filename'.

	if no input is specified sxpm reads from standard input.


	- Xpm functions and Ppm converters now deal with multiword colornames.
	  patches from Rainer Sinkwitz <sinkwitz@ifi.unizh.ch>.


3.0		(91/10/03)

	Functions name and defines have been modified again (sorry for that)
	as follows:

	     XpmReadPixmapFile    XpmReadFileToPixmap
	     XpmWritePixmapFile   XpmWriteFileFromPixmap

	     XpmPixmapColorError  XpmColorError
	     XpmPixmapSuccess     XpmSuccess
	     XpmPixmapOpenFailed  XpmOpenFailed
	     XpmPixmapFileInvalid XpmFileInvalid
	     XpmPixmapNoMemory    XpmNoMemory
	     XpmPixmapColorFailed XpmColorFailed

	To update code using Xpm you can use the included shell script called
	rename with the sed commands files name-3.0b-3.0c and name-3.0c-3.0.
	Old names still valid though.

    NEW FEATURES:
	- four new functions to work with images instead of pixmaps:

	     XpmReadFileToImage
	     XpmWriteFileFromImage
	     XpmCreateImageFromData
	     XpmCreateDataFromImage

    ENHANCEMENTS:
    	Algorithms to create and scan images and pixmaps are based on the
	MIT's R5 code, thus they are much cleaner than old ones and should
	avoid any problem with any visual (yes, I trust MIT folks :-)

    BUGS CORRECTED:
	Imakefile use INCDIR instead of ROOTDIR.

    CHANGES TO THE DOC:
	- the documentation presents the four new functions.

3.0c		(91/09/18)

	In answer to request of people functions, types and defines names have
	been changed as follows:

	     XCreatePixmapFromData	 XpmCreatePixmapFromData
	     XCreateDataFromPixmap	 XpmCreateDataFromPixmap
	     XReadPixmapFile		 XpmReadPixmapFile
	     XWritePixmapFile		 XpmWritePixmapFile
	     XFreeXpmAttributes		 XpmFreeAttributes

	     PixmapColorError		 XpmPixmapColorError
	     PixmapSuccess		 XpmPixmapSuccess
	     PixmapOpenFailed		 XpmPixmapOpenFailed
	     PixmapFileInvalid		 XpmPixmapFileInvalid
	     PixmapNoMemory		 XpmPixmapNoMemory
	     PixmapColorFailed		 XpmPixmapColorFailed

	     ColorSymbol		 XpmColorSymbol

	Generally speaking every public name begins with 'Xpm' and every
	private one with 'xpm'. This should avoid any possible conflict.

	Some files have also be renamed accordingly.

    NEW FEATURES:
	- support for VMS and two new options for sxpm: icon and hints (see
	manual for details) Richard Hess <rhess%pleione%cimshop@uunet.UU.NET>
	- DEFINES in Imakefile and Makefile.noXtree allows you to set the
	following:

	    	 ZPIPE for un/compressing piped feature (default is on)
		 NEED_STRCASECMP for system which doesn't provide one (default
				 is off)

	- xpmtoppm.c has is own strstr function which is used if NEED_STRSTR
	is defined when compiling - Hugues.Leroy@irisa.fr (Hugues Leroy).
	
    BUGS CORRECTED:
	- many bugs have been fixed, especially for ansi compilers -
	       Doyle C. Davidson (doyle@doyled.b23b.ingr.com) and
	       Clifford D. Morrison (cdm%bigdaddy%edsr@uunet.UU.NET)
	- parser is again a little more improved

3.0b		(91/09/12)

	This is a complete new version with a new API and where files and
	structures have been renamed. So this should be taken as a new
	starting release.
	This release should be quickly followed by the 3.0 because I'm planning
	to send it for X11R5 contrib which ends October 5th.

    NEW FEATURES:
	- support for transparent color.
	- support for hotspot.
	- a new function: XCreateDataFromPixmap to create an XPM data from a
	pixmap in order to be able to create a new pixmap from this data using
	the XCreatePixmapFromData function later on.
	- a new structure: XpmAttributes which replace the XpmInfo structure
	and which leads to a much simpler API with less arguments.
	- arguments such as visual, colormap and depth are optional, default
	values are taken if omitted.
	- parsing and allocating color failures don't simply break anymore. If
	another default color can be found it is used and a PixmapColorError
	is returned. In case no color can be found then it breaks and returns
	PixmapColorFailed.
	- for this reason the ErrorStatus codes are redefined as follows:

		   null     if full success
		   positive if partial success
		   negative if failure

	with:
		#define PixmapColorError    1
		#define PixmapSuccess       0
		#define PixmapOpenFailed   -1
		#define PixmapFileInvalid  -2
		#define PixmapNoMemory     -3
		#define PixmapColorFailed  -4

	- sxpm prints out a warning when a requested color could not be parsed
	or alloc'ed, and an error when none has been found.
	- sxpm handles pixmap with transparent color. For this purpose the
	plaid_mask.xpm is added to the distribution.

    BUGS CORRECTED:
	- I've again improved the memory management.
	- the parser is also improved.
	- when writing a pixmap to a file the variable name could be
	"plaid.xpm" which is not valid in C. Now the extension name is cut off
	to give "plaid" as variable name.
	- reading multiple words colornames such as "peach puff" where leading
	to non readable Xpm files. They are now skipped to have only single
	word colorname. Lionel Mallet (mallet@ipvpel.unipv.it).
	- parser was triggered by the "/" character inside string.
	Doyle C. Davidson (doyle@doyled.b23b.ingr.com). This is corrected.
	- sxpm maps the window only if the option "-nod" is not selected. 

    CHANGES TO THE DOC:
	- the documentation presents the new API and features.

3.0a		(91/04/10)

	This is an alpha version because it supports the new version of XPM,
	but the library interface is still the same. Indeed it will change in
	future release to get rid of obsolete stuff such as the type argument
	of the XWritePixmapFile function.

    ******************************* WARNING *********************************
	The format is not anymore XPM2, it is XPM version 3 which is XPM2
	limited to the C syntax with the key word "XPM" in place of "XPM2 C".
	The interface library has not changed yet but the type argument of
	XWritePixmapFile and the type member of XpmInfo are not used anymore.
	Meanwhile the library which is now called libXpm.a is backward
	compatible as XPM2 files can be read. But the XWritePixmapFile
	function only writes out XPM version 3 files.
    *************************************************************************

    NEW FEATURES:
	- the library doesn't use global variables anymore, thus it should be
	able to share it.
	- sxpm has been rewritten on top of Xt, it can be used to convert
	files from XPM2 to XPM version 3.
	- xpm1to2c.perl has been upgraded to the new XPM version and renamed
	as xpm1to3.perl
	- ppmtoxpm2.c and ppmtoxpm2.1 have been upgraded too and renamed
	ppmtoxpm.c and ppmtoxpm.1. In addition the xpmtoppm.c and xpmtoppm.1
	of the pbmplus package have been upgraded too. xpmtoppm can thus
	convert XPM version 1 and 3 to a portable pixmap. These files should
	replace the original ones which are part of the pbmplus package. See
	the ppm.README file for more details.
	- the library contains RCS variables which allows you to get revision
	numbers with ident (which is part of the RCS package). The Id number
	is an internal rcs number for my eyes only. The official one is found
	in Version.

    BUGS CORRECTED:
	- the memory management has been much improved in order to avoid
	memory leaks.
	- the XImage building algorithm has been changed to support correctly
	different visual depths. There is special code to handle depths 1, 4,
	6, 8, 24, and 32 to build the image and send it in one whack, and
	other depths are supported by building the image with XPutPixel which
	is slow but sure.
	- similar algorithms are used to read pixmaps and write them out.

    CHANGES TO THE DOC:
	- the documentation presents the new XPM format.


2.8		(90/12/19)

    ******************************* WARNING *********************************
        Since the last release two structures have been modified and have now
	bigger sizes, so ANY CODE USING THE libXPM2 NEEDS TO BE RECOMPILED.
    *************************************************************************

    NEW FEATURES:
	- the ColorSymbol struct contains the new member 'pixel' which allow
	to override default colors by giving a pixel value (in such a case
	symbol value must be set to NULL),
	- the XpmInfo struct contains the new member 'rgb_fname' in which one
	can specify an rgb text file name while writing a pixmap with the 
	XWritePixmapFile function (otherwise this member should be set to
	NULL). This way colorname will be searched and written out if found
	instead of the RGB value,
	- Imakefile originally provided by stolcke@ICSI.Berkeley.EDU,
	- the old Makefile is now distributed as Makefile.noXtree and presents
	install targets,
	- the demo application is renamed sxpm (Show XPM), creates a window of
	the size of the pixmap if no geometry is specified, prints out
	messages instead of status when an error occurs, handles the new
	option -p for overriding colors by giving a pixel value (not really
	useful but is just here to show this new feature), handles the new
	option -rgb for specifying an rgb text file, and ends on
	keypress as buttonpress,
	- defines for SYSV have been provided by Paul Breslaw
	<paul@mecazh.uucp>,
	- the distribution includes a new directory called converters which
	contains xpm1to2 and xpm1to2c perl converters and a ppmtoxpm2
	converter provided by Paul Breslaw who upgraded the original ppmtoxpm
	written by Mark W. Snitily <mark@zok.uucp>.

    CHANGES TO THE DOC:
	- this file is created and will give old users a quick reference to
	changes made from one release to the next one,
	- documentation is changed to present the new ColorSymbol structure
	and the way to override colors by giving a pixel value, and to present
	the new XpmInfo structure and how to use it,
	- a man page for sxpm is added to the distrib,
	- the README file talks about sxpm and no more demo, and have
	reference to the different converters.

2.7		(90/11/12)

    NEW FEATURES:
	- XReadPixmapFile reads from stdin if filename is NULL,
	- XWritePixmapFile writes to stdin if filename is NULL,
	- the demo application handles the new option -nod for no displaying
	the pixmap in a window (useful when used as converter).

    CHANGES TO THE DOC:
	- documentation about the new feature.

2.6		(90/10/29)

    NEW FEATURES:
	- from nazgul@alphalpha.com (Kee Hinckley): changes to make the
	library usable as C++ code, and on Apollo without any warning.

    BUGS CORRECTED:
	- from nazgul@alphalpha.com (Kee Hinckley): the xpm include files was
	declaring XWritePixmapFile as taking in arg a Pixmap pointer instead
	of a Pixmap.

2.5		(90/10/17)

    BUGS CORRECTED:
	- XWritePixmapFile was not closing the file while ending normally.

2.4		(90/09/06)

    NEW FEATURES:
	- XReadPixmapFile reads from a piped uncompress if the given filename
	ends by .Z or if filename.Z exists,
	- XWritePixmapFile writes to a piped compress if the given filename
	ends by .Z.

    BUGS CORRECTED:
	- demo now deals with window manager.

    CHANGES TO THE DOC:
	- documentation about compressed files management.

2.3		(90/08/30)

    BUGS CORRECTED:
	- handle monochrome display correctly,
	- comments can be empty.

2.2		(90/08/27)

    BUGS CORRECTED:
	- when reading some invalid free was dumping core on some machine.

2.1		(90/08/24)

    First distribution of XPM2.