• Old School RuneScape ¹⁾

• Fedora Workstation

• -Dsun.java2d.opengl=true enables Hardware-acceleration via OpenGL
• This is known to be broken with Intel graphics on multiple computers ²⁾
• As of 2020/09/24 is no known configuration where -Dsun.java2d.opengl=true offers a performance benefit
• On macOS, using the official .dmg to install OSRS results in the worst possible performance due to a mix of forced GPU acceleration and Retina with Java 8; it is recommended to manually install OSRS and to use the latest OpenJDK package available instead to workaround this
• -Dsun.java2d.uiScale at 2 and higher improves performance, along with lowering overall texture quality

• jagexappletviewer.jar from OldSchool.msi was used because it allows the copyright footer bar to be removed upon logging in ^{3) 4)}
• The copyright footer is not hidden with OpenJDK 12, 13, and presumably any JRE newer than 11 if jagexappletviewer.jar comes from OldSchool.msi ⁵⁾
• The copyright footer is only hidden with jagexappletviewer.jar from OldSchool.dmg if -Djava.system.class.loader=app.systemclassloader is set on both macOS and Linux hosts ⁶⁾

• wmctrl is used to toggle between windowed and fullscreen states
• p7zip-plugins is needed to extract jagexappletviewer.jar from OldSchool.dmg later ^{7) 8)}
• As of 2022/05/08, Java 17 nor 18 worked on Fedora 36, but 11 is still fine

sudo dnf install java-11-openjdk wmctrl && sync

sudo update-alternatives --config 'java'

rm -Rf ~/'runescape/oldschool' '/tmp/oldschool' && mkdir -p ~/'runescape/oldschool' '/tmp/oldschool' && wget -O '/tmp/oldschool/OldSchool.dmg' 'https://www.runescape.com/downloads/OldSchool.dmg' && 7z e -o'/tmp/oldschool/OldSchool-dmg' -y '/tmp/oldschool/OldSchool.dmg' && cp '/tmp/oldschool/OldSchool-dmg/jagexappletviewer.jar' ~/'runescape/oldschool/jagexappletviewer.jar' && cp '/tmp/oldschool/OldSchool-dmg/OSRS.icns' ~/'runescape/oldschool/OSRS.icns' && rm -Rf '/tmp/oldschool' && sync

• Change opengl and uiScale flags as-needed

mkdir -p ~/'.local/share/applications' && nano ~/'.local/share/applications/Old School RuneScape.desktop'

[Desktop Entry]
Name=Old School RuneScape
Comment=Relive the challenging levelling system and risk-it-all PvP of the biggest retro styled MMO. Play with millions of other players in this piece of online gaming heritage where the community controls the development so the game is truly what you want it to be!
Categories=Game;Java;AdventureGame;RolePlaying
Exec='/usr/bin/java' -Duser.home='/home/CHANGEME/runescape/oldschool' -Djava.class.path='/home/CHANGEME/runescape/oldschool/jagexappletviewer.jar' -Dcom.jagex.config='http://oldschool.runescape.com/jav_config.ws' -Djdk.tls.client.protocols='TLSv1.2' -Dhttps.protocols='TLSv1.2' -Xms'768M' -Xmx'768M' -Djava.system.class.loader='app.systemclassloader' -Dswing.crossplatformlaf='com.sun.java.swing.plaf.gtk.GTKLookAndFeel' -Dsun.java2d.opengl='false' -Dsun.java2d.uiScale='1' 'jagexappletviewer' 'oldschool'
Type=Application
StartupNotify=true
Path=/home/CHANGEME/runescape/oldschool
Icon=/home/CHANGEME/runescape/oldschool/OSRS.icns
StartupWMClass=jagexappletviewer
Actions=Screen;Cache;Notes;

[Desktop Action Screen]
StartupNotify=false
Exec='/usr/bin/wmctrl' -r 'Old School RuneScape' -b toggle,fullscreen -F
Name=Toggle Fullscreen/Windowed

[Desktop Action Cache]
StartupNotify=false
Exec='/bin/bash' -c "rm -Rf '/home/CHANGEME/runescape/oldschool/jagexcache' '/home/CHANGEME/runescape/oldschool/jagexappletviewer.preferences' '/home/CHANGEME/runescape/oldschool/jagex_cl_oldschool_LIVE.dat' '/home/CHANGEME/runescape/oldschool/random.dat' '/home/CHANGEME/runescape/oldschool/'*'.log' '/home/CHANGEME/runescape/oldschool/.java' '/tmp/oldschool' && sync && notify-send 'The Old School RuneScape cache has been cleaned.'"
Name=Cache Cleanup

[Desktop Action Notes]
StartupNotify=false
Exec=gio open 'https://wiki.realmofespionage.xyz/games:old_school_runescape'
Name=Installation Notes

sed -i 's/'CHANGEME'/'$USER'/g' ~/'.local/share/applications/Old School RuneScape.desktop'

rm -Rf ~/'runescape/oldschool/jagexcache' ~/'runescape/oldschool/jagexappletviewer.preferences' ~/'runescape/oldschool/jagex_cl_oldschool_LIVE.dat' ~/'runescape/oldschool/random.dat' '/tmp/oldschool' && sync

• See Java Flags for flags that can be added to this

cd ~/'runescape/oldschool' && java -Duser.home='.' -Djava.class.path='jagexappletviewer.jar' -Dcom.jagex.config='http://oldschool.runescape.com/jav_config.ws' -Dhttps.protocols='TLSv1.2' -Dsun.java2d.opengl='false' -Dsun.java2d.uiScale='1' 'jagexappletviewer' 'oldschool'

-XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:+AlwaysPreTouch -Xms'512M' -Xmx'512M' -XX:-UseBiasedLocking -XX:+DisableExplicitGC

-XX:+UseNUMA

gio open ~/'runescape/oldschool'

• jagexappletviewer.jar has varying filesizes depending on where it's sourced from, along with different functionality depending on the host operating system ⁹⁾

• Extracts jagexappletviewer.jar from OldSchool.msi and requires 7z
• Places it at ~/Downloads/windows-jagexappletviewer.jar

rm -Rf '/tmp/oldschool' && mkdir -p '/tmp/oldschool' && wget -O '/tmp/oldschool/OldSchool.msi' 'http://www.runescape.com/downloads/oldschool.msi' && 7z e -o'/tmp/oldschool/OldSchool-msi' -y '/tmp/oldschool/OldSchool.msi' && 7z e -o'/tmp/oldschool/rslauncher-cab' -y '/tmp/oldschool/OldSchool-msi/rslauncher.cab' && cp '/tmp/oldschool/rslauncher-cab/JagexAppletViewerJarFile'* ~/'Downloads/windows-jagexappletviewer.jar' && rm -Rf '/tmp/oldschool' && sync

• Extracts jagexappletviewer.jar from OldSchool.dmg and requires 7z
• Places it at ~/Downloads/macos-jagexappletviewer.jar

rm -Rf '/tmp/oldschool' && mkdir -p '/tmp/oldschool' && wget -O '/tmp/oldschool/OldSchool.dmg' 'http://www.runescape.com/downloads/OldSchool.dmg' && 7z e -o'/tmp/oldschool/OldSchool-dmg' -y '/tmp/oldschool/OldSchool.dmg' && cp '/tmp/oldschool/OldSchool-dmg/jagexappletviewer.jar' ~/'Downloads/macos-jagexappletviewer.jar' && rm -Rf '/tmp/oldschool' && sync

• Downloads jagexappletviewer.jar directly with wget ¹⁰⁾
• Places it at ~/Downloads/generic-jagexappletviewer.jar

wget -O ~/'Downloads/generic-jagexappletviewer.jar' 'http://oldschool.runescape.com/downloads/jagexappletviewer.jar' && sync

• TODO

am start -n 'com.jagex.oldscape.android/.AndroidLauncher'

am force-stop 'com.jagex.oldscape.android'

• Alternatively, use Explorer to make the runescape folder in the User folder and runescape\oldschool

if not exist %UserProfile%"\runescape\oldschool" mkdir %UserProfile%"\runescape\oldschool"

start %UserProfile%"\runescape"

• Download the Windows .zip of the latest Java package from https://jdk.java.net/
• Extract the root folder from the archive and drop it in the runescape folder
• Folder structure should be %UserProfile%\runescape\jdk-14
• javaw.exe should exist at %UserProfile%\runescape\jdk-14\bin\javaw.exe

• Extract it from the macOS Oldschool.dmg installer
• Should reside at %UserProfile%\runescape\oldschool\jagexappletviewer.jar

• Should reside at %UserProfile%\runescape\osrs.cmd
• The usual command-line arguments above can be tossed in or altered as-needed

cd "jdk-"*"\bin"

start javaw.exe -Djava.system.class.loader="app.systemclassloader" -Duser.home="..\..\oldschool" -Djava.class.path="..\..\oldschool\jagexappletviewer.jar" -Dcom.jagex.config="http://oldschool.runescape.com/jav_config.ws" -Dhttps.protocols="TLSv1.2" -Xms"768M" -Xmx"768M" -Dsun.java2d.uiScale="1" "jagexappletviewer" "oldschool"

• need macOS dmg .jar
• Need OpenJDK 13 or something in the ~/runescape folder
• OpenJDK 9 had GPU usage and lower FPS
• Need -Djava.system.class.loader=app.systemclassloader

rm -Rf ~/'runescape/oldschool' && mkdir -p ~/'runescape/oldschool' && curl 'http://oldschool.runescape.com/downloads/jagexappletviewer.jar' -o ~/'runescape/oldschool/jagexappletviewer.jar' && curl 'https://lh3.googleusercontent.com/WLvp10q8TwtyVgMsYL7gW0c7NVG5vnFcRNS7oQtTnSyWbM9kgo_MS8QZa3bsylNgZDba' -o ~/'runescape/oldschool/jagexappletviewer.png' && sync

#!/usr/bin/env zsh

cd ~/'runescape/oldschool'
~/'runescape/jdk-13.0.1.jdk/Contents/Home/bin/java' -Djava.system.class.loader='app.systemclassloader' -Duser.home='.' -Djava.class.path='jagexappletviewer.jar' -Dcom.jagex.config='http://oldschool.runescape.com/jav_config.ws' -Dhttps.protocols='TLSv1.2' -Xms'768M' -Xmx'768M' -Dsun.java2d.opengl='false' -Dsun.java2d.uiScale='2' 'jagexappletviewer' 'oldschool'