Changes

- Added a check to prevent attempt to launch 1.17+ with Java 8.
- Added an option to disable gl4es shaderconv in order to let ANGLE
processes them directly. This option lets Minecraft 1.17+ work
without the patch resource pack, OptiFine works aswell :)
- Changing renderer library no longer requires restart the launcher.
- Fixed some alert dialogs not displaying.
- PList default values are now set every time it loads.

JavaApp/src/main/java/net/kdt/pojavlaunch/JMinecraftVersionList.java

@@ -21,6 +21,7 @@ public class JMinecraftVersionList {
 		public Map<String, MinecraftClientInfo> downloads;
         public String id;
 		public String inheritsFrom;
+		public JavaVersionInfo javaVersion;
 		public DependentLibrary[] libraries;
 		public String mainClass;
 		public String minecraftArguments;
@@ -31,7 +32,10 @@ public class JMinecraftVersionList {
         public String type;
 		public String url;
     }
-
+	public static class JavaVersionInfo {
+        public String component;
+        public int majorVersion;
+    }
 	// Since 1.13
 	public static class Arguments {
 		public Object[] game;

JavaApp/src/main/java/net/kdt/pojavlaunch/Tools.java

@@ -79,6 +79,18 @@ public final class Tools
     public static final String LIBNAME_OPTIFINE = "optifine:OptiFine";
 
     public static void launchMinecraft(MinecraftAccount profile, final JMinecraftVersionList.Version versionInfo) throws Throwable {
+        String javaVersion = System.getProperty("java.version");
+        if (javaVersion.startsWith("1.")) {
+            javaVersion = javaVersion.substring(2);
+        }
+        int dotIndex = javaVersion.indexOf('.');
+        if (dotIndex != -1) {
+            javaVersion = javaVersion.substring(0, dotIndex);
+        }
+        if (versionInfo.javaVersion != null && versionInfo.javaVersion.majorVersion > Integer.parseInt(javaVersion)) {
+            throw new UnsupportedOperationException("Minecraft " + versionInfo.id + " requires Java " + versionInfo.javaVersion.majorVersion + " in order to run. Please switch to Java " + versionInfo.javaVersion.majorVersion + " in launcher settings.");
+        }
+
         String[] launchArgs = getMinecraftArgs(profile, versionInfo);
 
         // ctx.appendlnToLog("Minecraft Args: " + Arrays.toString(launchArgs));

JavaApp/src/main/java/net/kdt/pojavlaunch/uikit/UIKit.java

@@ -89,12 +89,14 @@ public class UIKit {
         PLaunchApp.installMinecraft(versionPath);
     }
 
-    public static void callback_SurfaceViewController_launchMinecraft(int width, int height) {
+    public static void callback_SurfaceViewController_launchMinecraft(int width, int height, String rendererLibName) {
         MCOptionUtils.load();
         MCOptionUtils.set("overrideWidth", Integer.toString(width));
         MCOptionUtils.set("overrideHeight", Integer.toString(height));
         MCOptionUtils.save();
+
         System.setProperty("cacio.managed.screensize", width + "x" + height);
+        System.setProperty("org.lwjgl.opengl.libname", rendererLibName);
 
         GLFW.internalChangeMonitorSize(width, height);
         CallbackBridge.mouseX = width / 2;