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Open-source multiplayer game server compatible with the RuneScape client
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openrs2/README.md

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OpenRS2

Introduction

OpenRS2 is an open-source multiplayer game server and suite of associated tools. It is compatible with build 550 of the RuneScape client, which was released in late 2009.

Prerequisites

Building OpenRS2 requires the following pieces of software on all platforms:

Platform-specific dependencies

OpenRS2 includes open-source replacements for the jaggl, jaggl_dri and jagmisc native libraries.

Your platform's standard C compiler and OpenGL development headers must be installed to build the native libraries.

Alternatively, pass -P '!windows,!mac,!unix' to all mvn invocations to exclude the native libraries from the build.

Windows

Install the Build Tools for Visual Studio (2019 or later), which provide a command-line version of the Visual C++ compiler. The full GUI version of Visual Studio will also work, but it is not required.

The Visual C++ tools must be present on your %PATH% when building OpenRS2. The easiest way to achieve this is to open the command prompt with the 'Developer Command Prompt for VS 2019' item from the start menu.

The Java Development Kit and Apache Maven bin directories must be manually added to your %PATH% variable.

Cross-compiling

To compile a 32-bit DLL on a 64-bit Windows system, open the 'x64_x86 Cross Tools Command Prompt for VS 2019' instead.

Maven's nar.javaHome variable must point to a 32-bit JDK and nar.arch must be set to x86:

-Dnar.javaHome="C:\Program Files (x86)\path\to\jdk" -Dnar.arch=x86

macOS

Run xcode-select --install from the terminal to install the Xcode command-line tools.

The easiest way to install the Java Development Kit and Apache Maven is with the Homebrew package manager. After installing Homebrew, run brew cask install java and brew install maven.

Cross-compiling

The last version of Java to support the 32-bit version of Mac OS X is the legacy Java 6 runtime.

Pass the following flags to Maven to compile against the 32-bit version of the legacy runtime on a 64-bit macOS system:

-Dnar.javaHome=/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home -Dnar.arch=i386

UNIX

OpenRS2 requires the GNU Compiler Collection and the Mesa 3D Graphics Library on UNIX-like systems (e.g. Linux).

The easiest way to install all the dependencies is with your system's package manager. For example:

  • Debian-based systems: apt install openjdk-12-jdk maven gcc libgl1-mesa-dev
  • RPM-based systems: yum install java-12-openjdk-devel maven gcc mesa-libGL-devel
  • ArchLinux-based systems: pacman -S jdk-openjdk maven gcc mesa

As OpenRS2 depends on a modern version of Java (at the time of writing), you will probably need to use a similarly modern version of your Linux distribution or enable its backports repository.

-headless packages are not sufficient as the gl-natives module is linked with libjawt.

Compatibility

The aol.properties file uses the normalized os.name property as part of the architecture/operating system/linker key. It currently only contains properties for Linux. While the default settings will probably work for other UNIX-like systems, the defaults are not ideal. For example, g++ will be used as the linker instead of gcc, introducing a redundant dependency on libstdc++.

Cross-compiling

To compile a 32-bit shared object on a 64-bit UNIX system, Maven's nar.javaHome variable must point to a 32-bit JDK and nar.arch must be set to i386:

-Dnar.javaHome=/path/to/jdk -Dnar.arch=i386

Non-free components

OpenRS2 requires the original RuneScape client code, data and location file encryption keys, which we cannot legally distribute.

These files must be manually placed in the nonfree directory (directly beneath the root of the repository), in the following structure:

nonfree
└── code
    ├── game_unpacker.dat
    ├── jaggl.pack200
    ├── loader_gl.jar
    ├── loader.jar
    ├── runescape_gl.pack200
    └── runescape.jar

The SHA-256 checksums of the correct files are:

7c090e07f8d754d09804ff6e9733ef3ba227893b6b639436db90977b39122590  nonfree/code/game_unpacker.dat
d39578f4a88a376bcb2571f05da1939a14a80d8c4ed89a4eb172d9e525795fe2  nonfree/code/jaggl.pack200
31182683ba04dc0ad45859161c13f66424b10deb0b2df10aa58b48bba57402db  nonfree/code/loader_gl.jar
ccdfaa86be07452ddd69f869ade86ea900dbb916fd853db16602edf2eb54211b  nonfree/code/loader.jar
4a5032ea8079d2154617ae1f21dfcc46a10e023c8ba23a4827d5e25e75c73045  nonfree/code/runescape_gl.pack200
0ab28a95e7c5993860ff439ebb331c0df02ad40aa1f544777ed91b46d30d3d24  nonfree/code/runescape.jar

The nonfree directory is included in the .gitignore file to prevent any non-free material from being accidentally included in the repository.

Building

Run mvn verify to download the dependencies, build the code, run the unit tests and package it.

Contributing

Code style

All source code must be formatted with IntelliJ IDEA's built-in formatter before each commit. The 'Optimize imports' option should also be selected. Do not select 'Rearrange entries'.

OpenRS2's code style settings are held in .idea/codeStyles/Project.xml in the repository, and IDEA should use them automatically after importing the Maven project.

Commit messages

Commit messages should follow the 'seven rules' described in 'How to Write a Git Commit Message', with the exception that the summary line can be up to 72 characters in length (as OpenRS2 does not use email-based patches).

License

Unless otherwise stated, all code and data is licensed under version 3.0 (and only version 3.0) of the GNU General Public License. The full terms are available in the COPYING file.

The deob-annotations, gl-natives, gl-dri-natives and misc-natives modules are instead licensed under version 3.0 (and only version 3.0) of the GNU Lesser General Public License. The full terms are available in the COPYING.LESSER file in each module's directory.

Copyright

Copyright (c) 2019 OpenRS2 Authors

OpenRS2 is free software: you can redistribute it and/or modify it under the terms of version 3.0 of the GNU General Public License as published by the Free Software Foundation.

OpenRS2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with OpenRS2. If not, see https://www.gnu.org/licenses/.