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Requirements
------------
If you want to hack on the GIMP project, it will make your life easier
to have the following packages (or newer versions) installed:
* GNU autoconf 2.54
- ftp://ftp.gnu.org/gnu/autoconf/
* GNU automake 1.7 (1.9, 1.8 and 1.6 will also work)
- ftp://ftp.gnu.org/gnu/automake/
* GNU libtool 1.4 (1.5 if you are compiling on Win32)
- ftp://ftp.gnu.org/gnu/libtool/
Fine GNU mirrors are listed at http://www.gnu.org/prep/ftp.html
Beta software can be found at alpha.gnu.org.
* pkg-config 0.7.0 (or preferably a newer version)
- http://www.freedesktop.org/software/pkgconfig/
* intltoolize 0.31.1 (or preferably a newer version)
- ftp://ftp.gnome.org/pub/gnome/sources/intltool/
* gtkdocize
- http://ftp.gnome.org/pub/GNOME/sources/gtk-doc/
* xsltproc
- ftp://ftp.gnome.org/pub/GNOME/sources/libxslt/1.1/
These are only the additional requirements if you want to compile from
CVS. The file INSTALL lists the various libraries we depend on.
Compilation
-----------
If you are accessing gimp via CVS, then you will need to take several
steps to get it to compile. You can do all these steps at once
by running:
cvsroot/gimp$ ./autogen.sh
Basically this does the following for you:
cvsroot/gimp$ aclocal-1.7; libtoolize; automake-1.7 -a;
cvsroot/gimp$ autoconf; glib-gettextize; intltoolize
The above commands create the "configure" script. Now you can run the
configure script in cvsroot/gimp to create all the Makefiles.
Before running autogen.sh or configure, make sure you have libtool in
your path. Also make sure glib-2.0.m4 glib-gettext.m4, gtk-2.0.m4,
pkg.m4 and intltool.m4 are either installed in the same
$prefix/share/aclocal relative to your automake/aclocal installation
or call autogen.sh as follows:
$ ACLOCAL_FLAGS="-I $prefix/share/aclocal" ./autogen.sh
Note that autogen.sh runs configure for you. If you wish to pass
options like --prefix=/usr to configure you can give those options to
autogen.sh and they will be passed on to configure.
If AUTOGEN_CONFIGURE_ARGS is set, these options will also be passed to
the configure script. If for example you want to enable the build of
the GIMP API reference manuals, you can set AUTOGEN_CONFIGURE_ARGS to
"--enable-gtk-doc". Please note that you will then need a recent
version of gtk-doc as well as a working setup for handling DocBook/XML.
If you do not have a recent version of gtk-doc, you can pass the
option "--disable-gtk-doc" to autogen.sh. This will completely
disable the support for gtk-doc so you will not be able to generate
the API documentation.
CVS
---
GIMP is available from GNOME CVS. You can also grab glib, pango, atk,
gtk+, libart, gtkhtml2 as well as intltool and gtk-doc from the same
CVS server. You can use the following commands to get them from the
anonymous CVS server:
$ export CVSROOT=':pserver:anonymous@anoncvs.gimp.org:/cvs/gnome'
$ cvs login
(there is no password, just hit return)
$ cvs -z3 checkout [-r <branch>] <module>
The interesting modules and the suggested stable branches to use are:
* gimp
* glib (glib-2-4)
* atk (gnome-2-6)
* pango (pango-1-4)
* gtk+ (gtk-2-4)
* libart_lgpl
* gtkhtml2
* intltool
* gtk-doc
Patches
-------
Please submit patches to the gimp-developer@lists.xcf.berkeley.edu
mailing list. It's also a good idea to file a bug-report at
http://bugzilla.gnome.org/ and attach your patch to it. All kinds
of contributions are appreciated.
Autogenerated Files
-------------------
Please notice that some files in the source are generated from other
sources. All those files have a short notice about being autogenerated
somewhere at the top. Among them are the files ending in _pdb.[ch] in
the libgimp directory and the files ending in _cmds.c in the app/pdb
subdirectory. Those are generated from the respective .pdb files in
tools/pdbgen/pdb. The list of contributors is used in several files
which are for that reason generated from the file contributors in
tools/authorsgen.
Hackordnung
-----------
We encourage you to follow the GIMP coding style throughout the GIMP
project. For the core components (application and libs) this coding
style is enforced. The GIMP coding style is defined as follows:
* There's a single space between the function name and the opening
bracket.
* Function names are lowercase, words separated by underscores.
* Macros and enums are all uppercase, words seperated by
underscores.
* Types are all words capitalized, no separators between words.
* All functions in header files need to be prototyped.
* Indentation rules are GNU coding style, in particular:
- 2 characters indentation level
- Do not use tabs (of course your editor can use tabs, but it
should write them to file as 8 spaces each).
- Opening brackets are on a new line and indented one level.
- Function header have the return type on one line, the name
starting in the first column of the following line. All
parameters are prototyped and there's a new line for each.
Try to make use of GLib's object system as much as possible. Do not
create wrappers around functions of parent classes. If you end up
duplicating code, try to create a common parent class and implement
the common methods there.
Don't include headers in headers except where unavoidable (e.g. for
deriving objects). Opaque typedefs go to app/base/base-types.h,
app/core/core-types.h etc. See devel-docs/includes.txt for a
detailed description of the include policy.
Don't use the GTK wrappers around the GLib object and signal system.
One goal of GIMP development is to make the GIMP code more readable
and understandable. Please help us to achieve this goal by cleaning up
the present code and make sure that all new code follows the coding
guidelines.
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