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An interface to the ImageMagick and GraphicsMagick image processing libraries.

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README.txt
  RMagick MAJOR.MINOR.TEENY


    README


        YY/MM/DD


    Table of Contents

    * Introduction <#introduction>
    * Contact information <#contact_information>
    * Prerequisites <#prerequisites>
    * Tips for installing and configuring ImageMagick and GraphicsMagick
      <#tips>
    * Installing RMagick <#installing_rmagick>
          o Configuration options <#configuration_options>
          o Running the configure and make scripts <#running>
    * Things that can go wrong <#things_that_can_go_wrong>
    * Upgrading <#upgrading>
    * Uninstalling <#uninstalling>
    * More samples <#more_samples>
    * Undocumented features <#undocumented_features>
    * Known issues <#known_issues>
    * Reporting bugs <#reporting_bugs>
    * Credits <#credits>
    * License <#license>


    Introduction

RMagick is an interface between the Ruby programming language and the
ImageMagick and GraphicsMagick image processing libraries.


    Contact Information

*Author:* Tim Hunter
*Email:* rmagick@rubyforge.org <mailto:rmagick@rubyforge.org>
*RubyForge:* RMagick <http://rubyforge.org/projects/rmagick>


    Prerequisites

*O/S*
    Linux, Sun Solaris, Cygwin, FreeBSD, MS Windows 98 and later.
*Ruby*
    Ruby 1.6.7 or later. You can get Ruby from www.ruby-lang.org
    <http://www.ruby-lang.org>

One of

*ImageMagick*
    ImageMagick 6.0.0 or later. You can get ImageMagick from
    www.imagemagick.org <http://www.imagemagick.org>.
*GraphicsMagick*
    GraphicsMagick is a friendly fork of ImageMagick 5.5.1. You can get
    GraphicsMagick from www.graphicsmagick.org
    <http://www.graphicsmagick.org>.

You only need one of ImageMagick or GraphicsMagick. RMagick works
equally well with both. Some RMagick methods may not be supported in one
or the other library.


    Tips for installing and configuring ImageMagick and GraphicsMagick

if you are installing RMagick by compiling the source code, I /strongly/
encourage you to install the latest version of ImageMagick or
GraphicsMagick /from source/. If you have never installed ImageMagick or
GraphicsMagick before, I also strongly encourage you to read the
README.txt file as many times as is necessary for you to understand how
to configure it. ImageMagick and GraphicsMagick are large and
complicated programs and can be difficult to configure. Follow these
tips to minimize the amount of time you'll spend and your frustration level.

Do /not/ simply type ./configure and expect the defaults to be correct
for you. Since you are installing ImageMagick/GraphicsMagick to use with
Ruby, consider whether you want to skip ImageMagick's/GraphicMagicks'
support for Perl and C++ by using the --without-perl and
--without-magick-plus-plus options. Doing so will speed up the
installation process and save some disk space. You will almost certainly
want to specify the --enable-shared and --disable-static options.

Determine which image formats you are interested in using and make sure
that you have installed the libraries that ImageMagick/GraphicsMagick
uses to process these formats. ImageMagick and GraphicsMagick use
additional libraries to support some image formats. If you do not
install those libraries you cannot read and write those image formats.
You will need to configure ImageMagick/GraphicsMagick to support the
JPG, PNG, TIFF, and WMF formats in order to execute all the RMagick
sample programs. See ImageMagick's or GraphicMagick's README.txt file
for more information.

Once you have determined the configuration options you need, run the
configure script. When it completes, read the summary output to see if
configuration worked the way you expected. Here's an example of the
summary output from ImageMagick's configure script. Notice that the
result of each option is listed in the "Configured value" column.

                  Option                        Value
-------------------------------------------------------------------------
Shared libraries  --enable-shared=yes           yes
Static libraries  --enable-static=no            no
Module support    --with-modules=yes            yes
GNU ld            --with-gnu-ld=yes             yes
LZW support       --enable-lzw=yes              yes
Quantum depth     --with-quantum-depth=8        8

Delegate Configuration:
BZLIB             --with-bzlib=yes              yes
DPS               --with-dps=yes                yes
FlashPIX          --with-fpx=yes                no
FreeType 2.0      --with-ttf=yes                yes
Ghostscript       None                          gs (7.07.2)
Ghostscript fonts --with-gs-font-dir=default    /usr/share/fonts/default/Type1/
Ghostscript lib   --with-gslib=no               no
Graphviz          --with-dot=yes                no
JBIG              --with-jbig=yes               no
JPEG v1           --with-jpeg=yes               yes
JPEG-2000         --with-jp2=yes                no
LCMS              --with-lcms=yes               yes
Magick++          --with-magick-plus-plus=no    no
PERL              --with-perl=no                no
PNG               --with-png=yes                yes
TIFF              --with-tiff=yes               yes
Windows fonts     --with-windows-font-dir=/mnt/windows/windows/fonts    /mnt/windows/windows/fonts/
WMF               --with-wmf=yes                yes
X11               --with-x=                     yes
XML               --with-xml=yes                yes
ZLIB              --with-zlib=yes               yes

X11 Configuration:
  X_CFLAGS     = -I/usr/X11R6/include
  X_PRE_LIBS   = -lSM -lICE
  X_LIBS       = -L/usr/X11R6/lib
  X_EXTRA_LIBS =

If the results are not what you wanted, install any missing libraries,
choose new or different options, or whatever it takes, erase the
config.cache file, and re-run configure. Repeat as often as necessary
before moving to the `make' and `make install' steps.

Detailed information about all of ImageMagick's and GraphicsMagick's
configuration options may be found in their README.txt and INSTALL.txt
files.


        Windows Metafile Format

As noted in the ImageMagick and GraphicsMagick README.txt files, to
support images in the Windows Metafile format,
ImageMagick/GraphicsMagick requires an additional library. Without this
library some of the RMagick sample programs will not work. ImageMagick
and GraphicsMagick require libwmf 0.2.5, 0.2.7, or 0.2.2 to support the
WMF format. (Avoid libwmf 0.2.6!)


    Installing RMagick

Installing RMagick is much simpler than installing ImageMagick or
GraphicsMagick. Note that the /make/ step runs all the example programs.
This process both builds the example images used in the documentation
and validates your RMagick installation. This step can take 5-15 minutes
depending on the speed of your computer.


        Configuration options

Type |./configure --help| to see a list of configuration options. In
addition to the regular options, there are a few RMagick-specific options:

--with-doc-dir=directory
    Specify the directory to install the RMagick documentation. By
    default this is $prefix/share/RMagick, where $prefix is the prefix
    specified by --prefix. For example, to install the documentation in
    /home/user/RMagick, specify:

./configure --with-doc-dir=/home/user/RMagick

--enable-allow-example-errors
    Normally the documentation installation terminates if 5 examples
    fail. If you use this option, the installation does not check for
    failing examples and will always complete. This option is useful if
    you're having trouble installing RMagick and you want to see all the
    failing examples.
--with-graphics-magick
    If you have both ImageMagick and GraphicsMagick installed, this
    option will force RMagick to be configured with GraphicsMagick.
--with-so-dir=directory
    The directory for ruby extensions.
--with-ruby-path=directory
    The path to set the !# line in Ruby scripts. The default is
    |$prefix/bin/ruby|.
--with-ruby-prog=name
    The name of the Ruby executable. The default is |ruby|.
--with-make-prog=name
    The name of the |make| program.
--with-rbconfig=path
    The path to the rbconfig.rb file to use. The default is Ruby's rbconfig.


        Running the |configure| and |make| scripts

De-compress the RMagick-MAJOR.MINOR.TEENY.tar.gz archive and enter the
top directory. Then type:

    $ ./configure <configuration options>
    $ make
   ($ su)
    $ make install
   (optionally)
    $ make clean


    Things that can go wrong

*Cannot open shared object file*

    When |make| is running the examples, if you get a message like this:

/home/you/RMagick-MAJOR.MINOR.TEENY/lib/RMagick.rb:11:in `require': libMagick.so.0:
  cannot open shared object file: No such file or directory -
  /home/you/RMagick-MAJOR.MINOR.TEENY/ext/RMagick/RMagick.so (LoadError)

    you probably do not have the directory in which the ImageMagick or
    GraphicsMagick library is installed in your load path. An easy way
    to fix this is to define the directory in the LD_LIBRARY_PATH
    environment variable. For example, suppose you installed the
    GraphicsMagick library libGraphicsMagick.so in /usr/local/lib. (By
    default this is where it is installed.) Create the LD_LIBRARY_PATH
    variable like this:

export LD_LIBRARY_PATH=/usr/local/lib

    On Linux, see |ld(1)| and |ld.so(8)| for more information. On other
    operating systems, see the documentation for the dynamic loading
    facility.

*No such file or directory - "/tmp/rmagick6872.6"*

    When |make| is running the examples, if you get a message like this:

hook /home/me/src/RMagick-MAJOR.MINOR.TEENY/./post-setup.rb failed:
No such file or directory - "/tmp/rmagick6872.6"

    you probably do not have a temporary directory environment variable
    set. Set the TMPDIR environment variable to your temporary
    directory. For example:

export TMPDIR=/home/me/tmp


    Upgrading

If you upgrade to a newer release of ImageMagick or GraphicsMagick, make
sure you're using a release of RMagick that supports that release.
Usually I put out a new release of RMagick with every new release of
ImageMagick. It's safe to install a newer release of RMagick over an
earlier release.


    Uninstalling

The `uninstall' target will uninstall RMagick completely:

    |make uninstall|


    More samples

You can find more sample RMagick programs in the /example directory.
These programs are not installed in the RMagick documentation tree.


    Undocumented features

This release includes an extra feature that isn't in the documentation.
The Magick module defines two methods that control ImageMagick's logging
function. This function is not officially documented by ImageMagick, so
I have decided not to add them to RMagick's documentation. However, you
may find them helpful for debugging your application. (Caveat: these two
methods may change behavior or be removed without advance notice! You
are on your own!)

/Magick::set_log_event_mask(event [,...]) -> Magick/

The arguments are one or more "event domains". The set_log_event_mask
method recognizes these event domains: "all", "annotate", "blob",
"cache", "coder", "configure", "deprecate", "draw", "locale", "none",
"resource", "transform", "user", and "x11". ImageMagick events that
match the mask are logged. The default domain is "none". For example,

          Magick::set_log_event_mask("render")

Logging is controlled by the log.mgk file, which may be found in the
same directory as the delegates.mgk files. (See ImageMagick's README.txt
file.) The purpose of the entries in this file is undocumented, so your
guess is as good as mine. Also, the meaning of the event domains and
exactly what events are logged are undocumented.

/Magick::set_log_format(format) -> Magick/

The default log format is described in the log.mgk file. This method
allows you to redefine the format at run-time. The format argument is a
string similar to an fprintf format string. Each line in the log has the
format described by the format string. Characters that are not control
characters are printed as-is. The control characters are:

         %t - the current time
         %r - the elapsed time
         %u - the user time
         %p - the pid (process id)
         %m - the name of the ImageMagick source file that contains the
              function that generated the event
         %f - the name of the ImageMagick function that generated the
              event
         %l - the line number in the source file
         %d - the event domain (one of the event mask strings listed above)
         %e - the event name

For example, the default log format is:

         Magick::set_log_format("%t %r %u %p %m/%f/%l/%d:\n  %e")


    Known issues

   1. gcc 3.2, during the "install.rb setup" step, issues the warning:

cc1: warning: changing search order for system directory "/usr/local/include"
cc1: warning:   as it has already been specified as a non-system directory

      This does not indicate a problem.
   2. With older releases of ImageMagick you may see the warning:

/usr/include/sys/ipc.h:25:3: warning: #warning "Files using this header must be compiled with _SVID_SOURCE or _XOPEN_SOURCE"

      This is harmless.


    Reporting bugs

Please report bugs in RMagick, its documentation, or its installation
programs to me via the bug tracker on the RMagick project page
<http://rubyforge.org/projects/rmagick/> at RubyForge. However, I cannot
help with Ruby installation and configuration or ImageMagick or
GraphicsMagick installation and configuration. Please report problems
with that software to their respective authors or distributors.


    Credits

Thanks to

    * Akinori MUSHA, for his work making RMagick available on FreeBSD.
    * Tom Payne, for reporting bugs, sending me the Ruby 1.8.0 patches,
      and for the Gentoo ebuild.
    * Bob Friesenhahn, for GraphicsMagick. Also for his help with the
      RMagick installation and many other things.
    * Simple Systems, for hosting the RMagick documentation online.
    * Mike Williams, for the RMagick Debian package
    * ImageMagick Studio LLC, for ImageMagick and for hosting the
      RMagick documentation.
    * Kaspar Schiess, for the MS Windows gem.


    License

Copyright © 2004 by Timothy P. Hunter

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 THE AUTHORS OR COPYRIGHT HOLDERS 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.

<http://www.opensource.org/docs/definition.php> 	

*This software is OSI Certified Open Source Software.
OSI Certified is a certification mark of the Open Source Initiative.*

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