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RMagick is an interface between the Ruby programming language and the ImageMagick and GraphicsMagick image processing libraries.
You only need one of ImageMagick or GraphicsMagick. RMagick works equally well with both.
If you have never installed ImageMagick or GraphicsMagick before, I strongly encourage you to install the newest version of your choice from source. 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. Through version 5.5.7, by default, ImageMagick is configured to use a color depth ("quantum-depth") of 16. Unless you have very special image processing needs you should use the --with-quantum-depth=8 option. This will cause ImageMagick run faster and use half as much memory. If you need to use 16 as the color depth, you'll know it.
GraphicsMagick defaults to a color depth of 8, so you need do nothing.
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.
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.
You will almost certainly want to specify the --enable-shared and --disable-static options.
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 Configure option Configured value ----------------------------------------------------------------- Shared libraries --enable-shared=yes yes Static libraries --enable-static=no no GNU ld --with-gnu-ld=yes yes LZW support --enable-lzw=no no Quantum depth --with-quantum-depth=8 8 Delegate Configuration: BZLIB --with-bzlib=yes yes DPS --with-dps=yes no (failed tests) FlashPIX --with-fpx=yes no FreeType 2.0 --with-ttf=yes yes Ghostscript None /usr/bin/gs Ghostscript fonts --with-gs-font-dir=default /usr/share/fonts/default/Type1/ Ghostscript lib --with-gslib=no 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.
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 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.
Type ./configure --help to see a list of
configuration options. In addition to the regular options,
there are a few RMagick-specific options:
./configure --with-doc-dir=/home/user/RMagick
configure and
make scriptsDe-compress the RMagick-1.4.0.tar.gz archive and enter the top directory. Then type:
$ ./configure <configuration options>
$ make
($ su)
$ make install
(optionally)
$ make clean
When make is running the examples, if you get
a message like this:
/home/you/RMagick-1.4.0/lib/RMagick.rb:11:in `require': libMagick.so.0: cannot open shared object file: No such file or directory - /home/you/RMagick-1.4.0/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.
When make is running the examples, if you get
a message like this:
hook /home/me/src/RMagick-1.4.0/./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
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.
The `uninstall' target will uninstall RMagick completely:
make uninstallYou can find more sample RMagick programs in the /example directory. These programs are not installed in the RMagick documentation tree.
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")
cc1: warning: changing search order for system directory "/usr/local/include" cc1: warning: as it has already been specified as a non-system directoryThis does not indicate a problem.
Please report bugs in RMagick, its documentation, or its installation programs to me via the bug tracker on the RMagick project page 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.
Thanks to
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.
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This software is OSI Certified Open Source Software. |