/*
 * 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.
 */


				XPM Version 3

WHAT IS XPM?
============

XPM (X PixMap) is a format for storing/retrieving X pixmaps to/from files.

Here is provided a library containing a set of four functions, similar to the
X bitmap functions as defined in the Xlib: XpmCreatePixmapFromData,
XpmCreateDataFromPixmap, XpmReadFileToPixmap and XpmWriteFileFromPixmap for
respectively including, storing, reading and writing this format, plus four
other: XpmCreateImageFromData, XpmCreateDataFromImage, XpmReadFileToImage and
XpmWriteFileFromImage for working with images instead of pixmaps.

This new version provides a C includable format, defaults for different types
of display: monochrome/color/grayscale, hotspot coordinates and symbol names
for colors for overriding default colors when creating the pixmap. It provides
a mechanism for storing information while reading a file which is re-used
while writing. This way comments, default colors and symbol names aren't lost.
It also handles "transparent pixels" by returning a shape mask in addition to
the created pixmap.

See the XPM Manual for details.

HOW TO GET XPM?
===============

New XPM updates are announced on the comp.windows.x newsgroup, and on the
"xpm-talk" list. All new "official" XPM releases can be found by ftp on:

    ftp.x.org          (18.112.44.100) contrib	 (Boston, USA)
    koala.inria.fr     (138.96.12.1)   pub/xpm	 (Sophia Antipolis, France)


DOCUMENTATION:
=============

Old users might read the CHANGES file for a history of changes interesting
the user.

Read the doc. The documentation is in PostScript format (file doc/xpm.PS) and
has been produced with FrameMaker. The source files are available on request.

A FAQ (Frequently Asked Questions) is also provided, so if you experience any
problem you should have a look at this file.


INSTALLATION:
============

To obtain the XPM library, first uncompress and untar the compressed tar file
in an appropriate directory.

Then you can either compile XPM via "imake" or in a stand-alone way.

WITH IMAKE:

	Imakefiles are provided to build both shared and unshared libraries.
	However, building a shared lib is very OS dependent and often requires
	specific files which are not available. Also config files are often not
	set correctly for this task. So if it fails you can avoid trying to
	build one and simply build the static library instead. In order to do
	so you should edit the top Imakefile to add -DSharedLibXpm=NO to the
	definition of IMAKE_DEFINES as described.

	The compilation and installation of the library and the sxpm program
	should only require you to edit the top Imakefile. But you should do so
	in order to specify the locations where the various files should be
	installed and to set the DEFINES variable accordingly to your system.

	On Solaris 2.* the compilation works only in the native svr4
	environment, avoid the bsd one or it won't compile. Especially you
	should be using /opt/SUNWspro/bin/cc and not /usr/ucb/cc.
	Also since the compiler is no longer part of the OS distribution a lot
	of people use gcc instead. This is fine, but be aware that the imake
	tool you get as part of the X Window System on a solaris box is
	configured for cc. Therefore the compilation using the generated
	Makefiles will not succeed unless you have changed the default
	configuration. An easy work around is to directly edit the generated
	lib/Makefile to change '-K pic' to '-fpic'. Fixing your imake
	configuration would be better though.

	On Linux, if you do not use ELF yet you'd better get the binary
	distribution available from sunsite. Because it's really a pain to
	build a shared lib and the current XPM distribution doesn't contain
	the jump files you would need to do so. On the other hand people have
	had no problems building it using ELF.


	Then execute the following command:

		xmkmf -a

	or if this option is not supported by your version of xmkmf:

		xmkmf
		make Makefiles
		make includes
		make depend		(optional)

	Then simply execute: 

		make

	which will build the XPM library and the sxpm application. 
	Then do:

	     	make install
		make install.man

	which will install the library and the sxpm program and man page.

	If it fails, be sure you have set the DEFINES correctly in the top
	Imakefile to suit your machine.


WITHOUT IMAKE:

	A set of makefiles is provided for those who do not have imake
	available on their system. However, this is only provided as a
	convenience and you should be considered as a starting point and not as
	something ready to use. These makefiles, called Makefile.noX, will most
	likely require some editing in order be set accordingly to your system.

	Once this setting is done, you should be able to compile XPM, by
	executing the following command:

	        make -f Makefile.noX

	Then to install it, do:

		make -f Makefile.noX install


SXPM:
====

In addition to the library the sxpm tool is provided to show XPM file and
convert them from XPM1 or XPM2 to XPM version 3. If you have previously done
'make' or 'make all' you should have it yet, otherwise just do:

		      cd sxpm; make

This application shows you most of the features of XPM and its source can be
used to quickly see how to use the provided functions.

By executing 'sxpm -help' you will get the usage.

Executing 'sxpm -plaid' will show a demo of the XpmCreatePixmapFromData
function. The pixmap is created from the static variable plaid defined in the
sxpm.c file. sxpm will end when you press the key 'q' in the created window.

Executing 'sxpm -plaid -sc lines_in_mix blue' will show the feature of
overriding color symbols giving a colorname, executing 'sxpm -plaid -sp
lines_in_mix 1' will show overriding giving a pixel value, and executing 'sxpm
-plaid -cp red 0' will show overriding giving a color value.

Then you should try 'sxpm -plaid -o output' to get an output file using the
XpmWriteFileFromPixmap function.

You can now try 'sxpm -plaid -o - -nod -rgb /usr/lib/X11/rgb.txt' to directly
get the pixmap printed out on the standard output with colornames instead of
rgb values.

Then you should try 'sxpm plaid.xpm' to use the XpmReadFileToPixmap function,
and 'cat plaid_mask.xpm|sxpm' to see how "transparent pixels" are handled.

The XpmCreatePixmapFromData function is on purpose called without any XpmInfos
flag to show the utility of this one. Indeed, compare the color section of the
two files foo and bar obtained from 'sxpm -nod -plaid -o foo' and 'sxpm -nod
plaid.xpm -o bar'. All the default colors and also the comments have been
restored.

To end look at plaid_ext.xpm and try "sxpm -nod plaid_ext.xpm -v" to see how
extensions are handled.

Of course, other combinations are allowed and should be tried. Thus, 'sxpm
plaid.xpm -o output -nod' will show you how to convert a file from XPM1 or XPM2
to a XPM version 3 using sxpm.

See the manual page for more detail.

OTHER TOOLS:
===========

Several converters dealing with XPM and a pixmap editor can be found in the
xpm-contrib distribution. Also I recommend the use of netpbm to do any kind of
general image operations such as scaling, resizing, dithering, and to convert
from and to any other image format.

DISCUSSION:
==========

There is a mailing list to discuss about XPM which is xpm-talk@sophia.inria.fr.
Any request to subscribe should be sent to xpm-talk-request@sophia.inria.fr.
The archive of the xpm-talk list is available through the web as:
http://zenon.inria.fr/koala/xpm-talk-hypermail
and through ftp as:
ftp://koala.inria.fr/pub/xpm/xpm-talk-archive

COPYRIGHT:
==========

  Copyright 1989-95 GROUPE BULL --
  See license conditions in the COPYRIGHT file of the XPM distribution

Please mail any bug reports or modifications done, comments, suggestions,
requests for updates or patches to port on another machine to:

lehors@sophia.inria.fr		(INTERNET)

33 (FRANCE) 93.65.77.71		(VOICE PHONE)

Arnaud Le Hors			(SURFACE MAIL)
Bull c/o Inria BP. 109
2004, Route des lucioles
Sophia Antipolis
06561 Valbonne Cedex
FRANCE
