Probably a few days porting to any other Unix system where current
gcc/egcs compilers and gdb debugger work. See the
GNUstep-HOWTO file or @url{http://www.gnustep.org/information/machines_toc.html} for more machines.
@node Does GNUstep run on Windows?, What is GNUstep's position towards KDE and the GNOME project?, What platforms does GNUstep run on?, GNUstep General Information
@subsection Does GNUstep run on Windows?
The primary targets for GNUstep are free 'Unix' platforms such
as GNU/Linux.
That being said, the base library should run on Windows-NT,98 with
the Cygwin unix emulation library from Cygnus
(http://sourceware.cygnus.com/cygwin/) or the MinGW libraries.
At present there are a
few problems with networking (Distributed Objects) support, but
the library is believed to work.
The gui library needs a win32 backend library to work under
Windows-NT. The backend library is a thin layer that converts the
GNUstep methods to handle drawing of GUI elements to calls to the
win32 api. This is a project looking for a volunteer.
The application-wrapper used for GNUstep already allows for multiple
binaries to be stored for different systems, so you should be able
to write once, deploy anywhere.
@node What is GNUstep's position towards KDE and the GNOME project?, Is the Objective C API for GTK related?, Does GNUstep run on Windows?, GNUstep General Information
@subsection What is GNUstep's position towards KDE and the GNOME project?
You can use GNUstep with GNOME and/or KDE. GNUstep displays
on top of X11. You can still do programming in C (since Objective-C
is just a superset of C), and when (if?) GCC gets around to it,
you'll be able to mix C++ and Objective-C code in the SAME file.
GNUstep, is much more than a window manager or desktop environment.
It frees you to develop cross-platform applications without the
work of developing an OS independent framework from scratch. It
gives you lots of basic functionality, from Font Panels to Unicode
strings to Distributed Objects.
@node Is the Objective C API for GTK related?, How about implementing parts of the Application Kit with GTK?, What is GNUstep's position towards KDE and the GNOME project?, GNUstep General Information
@subsection Is the Objective C API for GTK related?
No. GNUstep applications provide their GUI via the OpenStep
API, which provides fully object-oriented access to GUI manipulation.
The object-oriented nature of the libraries and language make it much easier
for new users to create their own subclasses rather than simply using the
supplied widgets as in other frameworks.
@node How about implementing parts of the Application Kit with GTK?, Which compiler can I use? Where can I get it?, Is the Objective C API for GTK related?, GNUstep General Information
@subsection How about implementing parts of the Application Kit with GTK?
Yes and No - The GNUstep architecture provides a single,
platform-independent, API for handling all aspects of GUI interaction
(implemented in the gstep-gui library), with a backend architecture
that permits you to have different display models (display postscript,
X-windows, win32, berlin ...) while letting you use the same code
for printing as for displaying. Use of GTK in the frontend gui
library would remove some of those advantages without adding any.
That being said, a backend library could be implemented using gtk
if anyone wanted to do so. Since the frontend library handles most
of the work involved in implementing the OpenStep API, the backend
is a relatively thin layer and the advantages of GTK over direct
xlib or win32 calls is likely to be minimal. If/when GTK is ported
to more systems, a backend written using it could be a valuable
asset - volunteers are, as always, wecome.
@node Which compiler can I use? Where can I get it?, Which Foundation Library can I use?, How about implementing parts of the Application Kit with GTK?, GNUstep General Information
@subsection Which compiler can I use? Where can I get it?
Use gcc-2.8.1 or later, from any GNU ftp site or, on some
platforms you must use egcs-1.1.1 or later, from http://egcs.cygnus.com/
@node Which Foundation Library can I use?, How do you use the gnustep-make package?, Which compiler can I use? Where can I get it?, GNUstep General Information
@subsection Which Foundation Library can I use?
That depends ...
If you only want to use the database package - gnustep-db, you can
use either the gnustep base library or libFoundation.
If you want to develop/use GNUstep gui applications, you must use
the gnustep-base library since libFoundation is (13-Feb-2000)
missing much essential functionality.
@node How do you use the gnustep-make package?, How can I get GNUstep?, Which Foundation Library can I use?, GNUstep General Information
@subsection How do you use the gnustep-make package?
Good question. Read the tutorials at the GNUstep web site. Also, use the
makefiles in the libraries, tool directories, and test applications as
examples.
@node How can I get GNUstep?, How do you run GNUstep?, How do you use the gnustep-make package?, GNUstep General Information
@node Compiling and Developing, GNU Objective C Compiler and Objective C Runtime Library, GNUstep General Information, Top
@section Compiling and Developing
@menu
* Can I run NeXT OPENSTEP or Apple Rhapsody programs on GNUstep?::
* Is it easy to port OPENSTEP and Rhapsody programs to GNUstep?::
* Is there an Interface Builder for GNUstep?::
* Can I use my original NIB files?::
* Will code without NIB files work?::
* Is GNUstep following Apple's Changes to OpenStep?::
* Do we have to have the NeXTstep look and feel?::
* Can one use the hybrid "Objective-C++"::
* Is there a plan to support Java/YellowBox Bindings?::
* What if I compile GNUstep under OPENSTEP/MacOS X Server?::
* How can I help with GNUstep?::
* How do I start writing code?::
* How do I start writing documentation?::
* How do I update the task list?::
* How do I start writing tests?::
* How do I start writing applications?::
* How can I help with the GNUstep website?::
* How do I compile GNUstep on my machine? ::
* Are there any precompiled packages available?::
* I get an error compiling mframe.m in gnustep-base::
@end menu
@node Can I run NeXT OPENSTEP or Apple Rhapsody programs on GNUstep?, Is it easy to port OPENSTEP and Rhapsody programs to GNUstep?, Compiling and Developing, Compiling and Developing
@subsection Can I run NeXT OPENSTEP or Apple Rhapsody programs on GNUstep?
You can't run these programs on GNUstep, but if you have the source
code for the programs, you should be able to port them to GNUstep and
compile them. Whether or not you will be able to run them depends on how
complete GNUstep is at the time.
@node Is it easy to port OPENSTEP and Rhapsody programs to GNUstep?, Is there an Interface Builder for GNUstep?, Can I run NeXT OPENSTEP or Apple Rhapsody programs on GNUstep?, Compiling and Developing
@subsection Is it easy to port OPENSTEP and Rhapsody programs to GNUstep?
It is probably easy for simple programs. You'll have to use nfmake
@url{http://karl.nfox.com} to translate the PB.prject file to GNUstep
Makefiles, or rewrite the Makefiles yourself. You will also have to
translate the NIB files (if there are any) to GNUstep model files using
the nib2gmodel program (from @url{ftp://ftp.gnustep.org/pub/gnustep/dev-apps}).
@node Is there an Interface Builder for GNUstep?, Can I use my original NIB files?, Is it easy to port OPENSTEP and Rhapsody programs to GNUstep?, Compiling and Developing
@subsection Is there an Interface Builder for GNUstep?
There is an Interface Builder for GNUstep called Gorm, but it is
in alpha release, so it may not work perfectly.
You can get it from the GNUstep CVS repository (cvs -z3 checkout Gorm).
The Project Manager ProjectCenter is also new.
@node Can I use my original NIB files?, Will code without NIB files work?, Is there an Interface Builder for GNUstep?, Compiling and Developing
@subsection Can I use my original NIB files?
No - NeXT/Apple never documented their nib format, so GNUstep
supports both the 'gmodel' format (which stores information as text
(property-lists) and can therefore be edited 'by hand') and binary
archive format (which can be edited by Gorm).
There IS a conversion tool that can be compiled under OPENSTEP to convert
OPENSTEP nib files to GNUstep gmodel files.
@node Will code without NIB files work?, Is GNUstep following Apple's Changes to OpenStep?, Can I use my original NIB files?, Compiling and Developing
@subsection Will code without NIB files work?
Well, GNUstep implements the OpenStep API, not the old NeXTstep
API but, Yes - once the gui library is complete, OpenStep or MacOS-X
code should work without translation under GNUstep.
@node Is GNUstep following Apple's Changes to OpenStep?, Do we have to have the NeXTstep look and feel?, Will code without NIB files work?, Compiling and Developing
@subsection Is GNUstep following Apple's Changes to OpenStep?
Yes - gstep-base already contains the documented changes in the
Foundation library. GNUstep aims to be compatible with both the
OpenStep specification and with MacOS-X It should be easy to write
an application that compiles cleanly under both GNUstep and Yellow
Box.
@node Do we have to have the NeXTstep look and feel?, Can one use the hybrid "Objective-C++", Is GNUstep following Apple's Changes to OpenStep?, Compiling and Developing
@subsection Do we have to have the NeXTstep look and feel?
Gnustep is aiming for something like the NeXTstep-3.3 look and
feel This is mostly determined by the gui backend library. In the
case of the two existing backends (xdps and xgps), both are designed
to look like NeXTstep/OPENSTEP. If someone wants to write a backend
with a different look, they can. This would only be a few man-months
work.
@node Can one use the hybrid "Objective-C++", Is there a plan to support Java/YellowBox Bindings?, Do we have to have the NeXTstep look and feel?, Compiling and Developing
@subsection Can one use the hybrid "Objective-C++"
that one could on the NeXT?
No - at present the GNU compiler (gcc or egcs) does not support
"Objective-C++" There are no specific plans to make it do so, but
any volunteers to do it would be welcome.
@node Is there a plan to support Java/YellowBox Bindings?, What if I compile GNUstep under OPENSTEP/MacOS X Server?, Can one use the hybrid "Objective-C++", Compiling and Developing
@subsection Is there a plan to support the Java/YellowBox Bindings?
Yes. The GNustep Java library/bridge called JIGS is available now. JIGS
is a free (LGPL) Java Interface for GNUstep; it can automatically wrap
Objective-C libraries based on GNUstep making them accessible directly
to the Java programmer as if they were Java libraries. As a side effect,
it is also possible to use the whole engine in the reverse way: JIGS
provides a high level API to allow Objective-C programmers to start java
virtual machines inside GNUstep Objective-C code and access java objects
in the java virtual machine transparently, as if they were objective-C
objects.
@node What if I compile GNUstep under OPENSTEP/MacOS X Server?, How can I help with GNUstep?, Is there a plan to support Java/YellowBox Bindings?, Compiling and Developing
@subsection What if I compile GNUstep under OPENSTEP/MacOS X Server?
No - GNUstep uses the X-windows display postscript extension
- the interface to that is not the same as the interface to the
OPENSTEP/MacOS-X windows server. While someone could write a
backend library to provide the interface, nobody has bothered to
date.
Also - there is no known recent port to OPENSTEP of the base library.
@node How can I help with GNUstep?, How do I start writing code?, What if I compile GNUstep under OPENSTEP/MacOS X Server?, Compiling and Developing
the TODO list and library headers 4. Write applications
Some general advice -
Let people know what you are doing. Break your project up into
the smallest units you can. Feed back frequent updates to the
maintainers. Ask questions in the discussion mailing list.
Do remember that any changes beyond a few lines of code (or
documentation) require a disclaimer or copyright assignment to the
Free Software Foundation before they can be incorporated into the
project. Get in touch with the maintainer of the library you are
working on about this.
Don't start with large-scale reorganisation of anything - instead,
get a general idea in mind of what you want to do, and proceed as
much as possible with incremental changes that don't break anything
- that way you can make those incremental changes available to the
rest of the community at frequent intervals.
Don't be afraid to give up - there is no shame in finding out that
you have take on too large/complex a project. It's much better to
'resign' and take on a smaller job than to just stop without telling
anyone.
@node How do I start writing code?, How do I start writing documentation?, How can I help with GNUstep?, Compiling and Developing
@subsection How do I start writing code?
There is plenty of unimplemented stuff in the gui library and
backend libraries that volunteers can work on - just browse through
the code and see if it conforms to the documentation.
Specific tasks are noted in the developers section on the www.gnustep.org
website.
Once you have coded something, you could always write a testcase
and documentation for it :-)
@node How do I start writing documentation?, How do I update the task list?, How do I start writing code?, Compiling and Developing
@subsection How do I start writing documentation?
Our documentation format is called gsdoc, which is an SGML format
for Objective-C documentation in the same vein as XML. We are also trying
to use Autodoc to self document source code. The gsdoc translator is
included with the base library.
Newcomers could write documentation for individual classes by
comparing the OpenStep specification, the MacOS-X documentation,
and the GNUstep source. Documentation should clearly note where
individual methods are specific to OpenStep, MacOS-X or are GNustep
extensions.
More experienced people could write documentation on general
programming topics, and tutorials for new users.
Anyone willing to write documentation, either tutorials for using
GNUstep, or reference documentation for individual classes, should
either write it in gsdoc or as plain ascii text for someone else to
format into gsdoc.
GNUstep documentation should have copyright assigned to the Free
Software Foundation.
@node How do I update the task list?, How do I start writing tests?, How do I start writing documentation?, Compiling and Developing
@subsection How do I update the task list?
The task list (@url{http://www.gnustep.org/developers/tasks.html}) is
supposed to tell people what jobs are waiting to be done.
One job of major importance that pretty much anyone can do is to
look for jobs to add to the task list. In the case of methods from
the OpenStep specification or the MacOS-X documentation not being
present in the GNustep libraries, it is also helpful to add the
method prototypes to the library header files.
At the moment, send changes to Adam Fedor @email{fedor@@gnu.org} or Richard
Frith-Macdonald @email{richard@@brainstorm.co.uk}
We are hoping to have a system where people can update the list
directly.
A beginner can look through the MacOS-X documentation, the OpenStep
specification and the GNUstep source and contribute TODO items.
If a class or method is in MacOS-X and OpenStep but is not in
GNUstep - it's a high priority TODO and should at least be added
to the GNUstep headers and a dummy version added to the source with
a FIXME comment.
If a class or method is in MacOS-X but not OpenStep or GNUstep -
it's a low priority TODO. It should be added to the GNUstep headers
bracketed in @code{#ifndef STRICT_OPENSTEP}
If a class or method is in OpenStep but not in MacOS-X or GNUstep
- it's a low priority TODO. It should be added to the GNUstep
headers bracketed in @code{#ifndef STRICT_MACOS_X}
There are a couple of people working on this already, so it's a
good idea to get in touch with Adam or Richard to coordinate efforts.
@node How do I start writing tests?, How do I start writing applications?, How do I update the task list?, Compiling and Developing
@subsection How do I start writing tests?
You can write testcases - where the libraries fail tests, you
could either fix the problem, or add it to the task list.
To write testcases, you need to use anonymous CVS to install the
latest gstep-core snapshot you can find. Then checkout the 'tests'
module from CVS. In the 'tests' directory, you will find a
regression testing framework for gstep-base.
In order to use this you will also need a recent (v 1.3.2 or later) copy of
Guile (you can get this from a GNU ftp site) and will need to hacke checked
out, built, and installed the 'guile' package from the GNUstep CVS repository.
At present, there is no such framework for the gui library - If
you are interested in working on one, contact @email{richard@@brainstorm.co.uk}
@node How do I start writing applications?, How can I help with the GNUstep website?, How do I start writing tests?, Compiling and Developing
@subsection How do I start writing applications?
You can either look at the links on the GNUstep website for
applications that have been started, and email their owners to
volunteer to help, or you can start your own project.
If you are starting your own project, you need to - 1. Get the
latest snapshot of GNUstep and build it to use the 'xgps' or 'xdps' backend
library. 2. Look at
the example applications (particularly Ink.app) in the gstep-examples package
directory as a basis for your work. 3. Be prepared to
a) ask for help on the gnustep-discuss mailing list b) fix bugs
and implement missing functionality in the gui and xgps
libraries.
@node How can I help with the GNUstep website?, How do I compile GNUstep on my machine? , How do I start writing applications?, Compiling and Developing
@subsection How can I help with the GNUstep website?
Talk to Adam Fedor @email{fedor@@gnu.org}, the maintainer.
The GNUstep website is kept as a CVS module, but the largest portions
of it (the FAQ, the TODO list, and the Documentation) are actually
generated from files in the individual GNUstep packages.
If you want to update the FAQ or TODO list or documentation - grab
the latest snapshot of the GNUstep core you can find, update it
from the CVS repository, and work with the contents of the appropriate
documentation directory.
If you want to work on other parts of the website - capture the
pages you want to edit in your web browser (at http://www.gnustep.org).
If you can't do that, you can grab a copy of the website via
The main task with the website is to figure out which bits are
out-of-date (or wrong) and update/mark-as-outdated as required.
Current status -
The 'developers section' of the FAQ is being worked on by
@email{stevensl@@mindspring.net}, and we are looking at rewriting the more
general parts of the FAQ.
@node How do I compile GNUstep on my machine? , Are there any precompiled packages available?, How can I help with the GNUstep website?, Compiling and Developing
@subsection How do I compile GNUstep on my machine?
Read the file @file{GNUstep-HOWTO}, which comes with the GNUstep
distribution, and also is available separately on the GNUstep ftp
sites. A PDF version also exists on the web site called
@file{GnustepInstall.pdf}.
@node Are there any precompiled packages available?, I get an error compiling mframe.m in gnustep-base, How do I compile GNUstep on my machine? , Compiling and Developing
@subsection Are there any precompiled packages available?
Check @url{http://www.gnustep.org/resources/sources.html} for links
to sites with RPMS, and perhaps in the future, Debian packages.
In some cases. You can check the debian site for preconfigured GNUstep
packages.
@node I get an error compiling mframe.m in gnustep-base, , Are there any precompiled packages available?, Compiling and Developing
@subsection I get an error compiling mframe.m in gnustep-base.
This occurs on some GNU/Linux systems. You'll need to change the
@node GNU Objective C Compiler and Objective C Runtime Library, GNUstep Base Library, Compiling and Developing, Top
@section GNU Objective C Compiler and Objective C Runtime Library
@menu
* What is the Objective C Runtime Library?::
* Does it allow a mixture of Objective C and C++::
* Where can I find more information?::
@end menu
@node What is the Objective C Runtime Library?, Does it allow a mixture of Objective C and C++, GNU Objective C Compiler and Objective C Runtime Library, GNU Objective C Compiler and Objective C Runtime Library
@subsection What is the Objective C Runtime Library?
The Objective C Runtime Library provides C functions and data structures
required to execute an Objective C program.
The GNU Objective C Runtime Library offers everything NeXT's runtime
does, including Categories, Protocols, @samp{+poseAs:}, thread-safety,
class initialization on demand, delayed loading of classes, and
initialization of static instances (such as @@""-style string objects).
It also has several improvements over NeXT's implementation:
@itemize @bullet
@item NeXT's runtime requires an extra function call (objc_msgSend) for
each message that is sent; (the function looks up the receiving
instance's implementation of the method). GNU's implementation is
faster because it does not use an extra function call. Instead, it
inlines a short piece of code that makes two pointer hops into a method
dispatch table; because the code is inlined, it does not incur the
overhead of a function call.
@item When running in thread-safe mode, NeXT's runtime must aquire a
global mutual exclusion lock every time a message is sent; this is
extremely slow. GNU's runtime, amazingly, sends messages just as fast
in thread-safe mode as it does in single-thread mode---the code path
does not contain even a single extra instruction! The GNU runtime only
needs locks when certainly structures are written, not read; the
structures are written relatively infrequently: only at class
initialization and when @samp{+poseAs:} is called.
@item GNU's runtime provides ``selector-types'' along with each
selector; NeXT's does not. A selector-type is a string that describes
the C variable types for the method's return and argument values. Among
other uses, selector-types is extrememly helpful for fast distributed
objects implementations, (see GNUstep Base Library Section, below).
@item Many of the GNU functions have different names than their
corresponding NeXT functions; the GNU names conform to the GNU coding
standards.
@item GNU's runtime library has a new class heirarchy manipulating
method called @samp{-transmuteClassTo:}. It can change the class of an
instance to a cousin class of the same instance-size.
@item NeXT's compiler, @samp{cc}, is based on an old version of
@samp{gcc}. GNU's compiler is, of course, the latest version of
@samp{gcc}, and therefore contains all the latest enhancements.
@end itemize
@node Does it allow a mixture of Objective C and C++, Where can I find more information?, What is the Objective C Runtime Library?, GNU Objective C Compiler and Objective C Runtime Library
@subsection Does it allow a mixture of Objective C and C++?
No. Unlike NeXT's @samp{cc}, GNU GCC does not support source files
containing both Objective C and C++. People at Cygnus have mentioned
that they would be willing to do the work---if they were paid for it, of
course. Several people are interested in seeing this happen. Send
email to @samp{discuss-gnustep@@gnu.org} if you are interesting in
pushing this issue, so that the efforts of all those people interested
can be coordinated.
Also, unlike NeXT's @samp{cc}, GNU GCC does not support the @samp{extern
"Objective-C"} construct.
@node Where can I find more information?, , Does it allow a mixture of Objective C and C++, GNU Objective C Compiler and Objective C Runtime Library
@subsection Where can I find more information?
The FAQ associated with the newsgroup @samp{comp.lang.objective-c}
contains more information about GNU Objective C.
@c ------------- GNU Compiler and Objective C Runtime Library -------
@node GNUstep Base Library, GNUstep GUI Library, GNU Objective C Compiler and Objective C Runtime Library, Top
@section GNUstep Base Library
@menu
* What is the GNUstep Base Library?::
* What is base's current state of development?::
* What are the features of GNU Distributed Objects?::
@end menu
@node What is the GNUstep Base Library?, What is base's current state of development?, GNUstep Base Library, GNUstep Base Library
@subsection What is the GNUstep Base Library?
The GNUstep Base Library is a library of general-purpose, non-graphical
Objective C objects. For example, it includes classes for strings,
notifications, notification dispatchers, moments in time, network ports,
remote object messaging support (distributed objects), event loops, and
random number generators.
It provides functionality that aims to implement the non-graphical
portion of the OpenStep standard (the Foundation library).
@node What is base's current state of development?, What are the features of GNU Distributed Objects?, What is the GNUstep Base Library?, GNUstep Base Library
@subsection What is its current state of development?
It is about 98 percent of the way to having all the OpenStep classes (and
the later OPENSTEP/Rhaspody classes) fully implemented.
Normal work can already be done using the library since the
missing 2 percent are the least-often-used features or are simply not
up to date with the latest MacOS-X spec.
Over 60,000 lines of code have already been written.
@node What are the features of GNU Distributed Objects?, , What is base's current state of development?, GNUstep Base Library
@subsection What are the features of GNU Distributed Objects?
GNU Distributed Objects has many of the features of other distributed
objects implementations, but, since it is free software, it can be
ported to platforms for which other distributed objects implementations
are not available.
[NOTE: The GNU distributed object facilities have the same ease-of-use
as NeXT's; be warned, however, that they are not compatible with each
other. They have different class heirarchies, different instance
variables, different method names, different implementation strategies
and different network message formats. You cannot communicate with a
NeXT NSConnection using a GNU Connection.
Here are some differences between GNU distributed objects and NeXT's
distributed objects: NeXT NSDistantObject asks it's remote
target for the method encoding types and caches the results; GNU
NSDistantObject gets the types directly from the local GNU "typed selector"
mechanism if the information is known locally and only queries the remote
target or caching encoding types when using a method that is not known to
the local process. The NSProxy for the remote root object always has name 0
and, once set, you cannot change the root object of a NSConnection; the GNU
Proxy for the remote root object has a target address value just like
all other Proxy's, and you can change the root object as many times as
you like. ].
@c --------------------------GNUstep Base Library----------------------
@node GNUstep GUI Library, GNUstep DisplayGhostScript Server, GNUstep Base Library, Top
@section GNUstep GUI Library
@menu
* What is the GUI Library?::
* Explain the organization of the front- and back-ends::
* What is the current state of development of the front-end?::
* What is the current state of development of the X/DPS back-end?::
@end menu
@node What is the GUI Library?, Explain the organization of the front- and back-ends, GNUstep GUI Library, GNUstep GUI Library
@subsection What is the GUI Library?
The GNUstep GUI Library is a library of objects useful for writing
graphical applications. For example, it includes classes for drawing
and manipulating graphics objects on the screen: windows, menus,
buttons, sliders, text fields, and events. There are also many
peripheral classes that offer operating-system-independent interfaces to
images, cursors, colors, fonts, pasteboards, printing. There are also
workspace support classes such as data links, open/save panels,
context-dependent help, spell checking.
It provides functionality that aims to implement the @samp{AppKit}
portion of the OpenStep standard. However the implementation has
been written to take advantage of GNUstep enhancements wherever possible.
@node Explain the organization of the front- and back-ends, What is the current state of development of the front-end?, What is the GUI Library?, GNUstep GUI Library
@subsection Explain the organization of the front- and back-ends
The GNUstep GUI Library is divided into a front- and back-end. The
front-end contains the majority of implementation, but leaves out the
low-level drawing and event code. A back-end can override whatever
methods necessary in order to implement low-level drawing event
receiving. Different back-ends will make GNUstep available on various
platforms. The default GNU back-end will run on top of X Windows and
the DisplayGhostScript Server. Other back-ends could allow GNUstep to
run on OpenGL, OS/2, and WIN32 graphics/event platforms. Much work
will be saved by this clean separation between front- and back-end,
because it allows different platforms to share the large amount of
front-end code.
@node What is the current state of development of the front-end?, What is the current state of development of the X/DPS back-end?, Explain the organization of the front- and back-ends, GNUstep GUI Library
@subsection What is the current state of development of the front-end?
Many of the classes are well implemented, if not thouroughly tested.
See the GNUstep web sites and read status information contained in the
distribution for the most up-to-date information.
@node What is the current state of development of the X/DPS back-end?, , What is the current state of development of the front-end?, GNUstep GUI Library
@subsection What is the current state of development of the X/DPS back-end?
It works, but is slow and buggy. A lot of work could be done.
@node GNUstep DisplayGhostScript Server, , GNUstep GUI Library, Top
@section GNUstep DisplayGhostScript Server
@menu
* What is the Display Ghostscript Server?::
* What is DGSs current state of development?::
* What is the relationship between the Display Ghostscript Server and X Windows?::
@end menu
@node What is the Display Ghostscript Server?, What is DGSs current state of development?, GNUstep DisplayGhostScript Server, GNUstep DisplayGhostScript Server
@subsection What is the Display Ghostscript Server?
It is a free implementation of a Display PostScript server based on the
@node What is DGSs current state of development?, What is the relationship between the Display Ghostscript Server and X Windows?, What is the Display Ghostscript Server?, GNUstep DisplayGhostScript Server
@subsection What is its current state of development?
@node What is the relationship between the Display Ghostscript Server and X Windows?, , What is DGSs current state of development?, GNUstep DisplayGhostScript Server
@subsection What is the relationship between the Display Ghostscript Server and X Windows?
Display Ghostscript runs on top of X Windows.
@c ------------------ GNUstep DisplayGhostScript Server ---------------
@format
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