From d4592e8c3480ff6b309ce445a9b4f07c0a2ea5f2 Mon Sep 17 00:00:00 2001
From: alexytomi <60690056+alexytomi@users.noreply.github.com>
Date: Sun, 21 Sep 2025 14:49:51 +0800
Subject: [PATCH] [Regression]fix: Legacy Fabric using wrong LWJGL classes

---
 .../src/main/java/net/kdt/pojavlaunch/Tools.java            | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/Tools.java b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/Tools.java
index 84292159c..c562c946e 100644
--- a/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/Tools.java
+++ b/app_pojavlauncher/src/main/java/net/kdt/pojavlaunch/Tools.java
@@ -363,7 +363,11 @@ public final class Tools {
 
         javaArgList.addAll(Arrays.asList(getMinecraftJVMArgs(versionId, gamedir)));
         javaArgList.add("-cp");
-        javaArgList.add(launchClassPath + ":" + getLWJGL3ClassPath());
+        if (launchClassPath.contains("bta-client-")){ // BTADownloadTask.BASE_JSON sets this. Jank.
+            // BTA for some reason needs this to be last or else it uses the wrong lwjgl
+            javaArgList.add(launchClassPath + ":" + getLWJGL3ClassPath());
+        // Legacy Fabric needs this to be first or else it uses the wrong lwjgl
+        } else javaArgList.add(getLWJGL3ClassPath() + ":" + launchClassPath);
 
         javaArgList.add(versionInfo.mainClass);
         javaArgList.addAll(Arrays.asList(launchArgs));