From eb3455452b57b9a9d5309d70e8b11088d12be2e0 Mon Sep 17 00:00:00 2001
From: James Seibel <jeseibel@gondtc.com>
Date: Mon, 26 Jul 2021 20:26:24 -0500
Subject: [PATCH] Fix getting the GPU's fancy fog capabilities

---
 src/main/java/com/seibel/lod/LodMain.java     | 20 -------------------
 .../com/seibel/lod/render/LodRenderer.java    | 19 ++++++++++++++++--
 2 files changed, 17 insertions(+), 22 deletions(-)

diff --git a/src/main/java/com/seibel/lod/LodMain.java b/src/main/java/com/seibel/lod/LodMain.java
index 68c9f062f..c4177f297 100644
--- a/src/main/java/com/seibel/lod/LodMain.java
+++ b/src/main/java/com/seibel/lod/LodMain.java
@@ -17,15 +17,11 @@
  */
 package com.seibel.lod;
 
-import org.lwjgl.opengl.GL;
-
 import com.seibel.lod.handlers.LodConfig;
 import com.seibel.lod.proxy.ClientProxy;
-import com.seibel.lod.render.LodRenderer;
 
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.eventbus.api.SubscribeEvent;
-import net.minecraftforge.fml.DeferredWorkQueue;
 import net.minecraftforge.fml.ModLoadingContext;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.config.ModConfig;
@@ -55,22 +51,6 @@ public class LodMain
 	private void init(final FMLCommonSetupEvent event)
 	{
 		ModLoadingContext.get().registerConfig(ModConfig.Type.CLIENT, LodConfig.clientSpec);
-		
-		
-		Thread setFancyFog = new Thread(() ->
-		{ 
-			LodRenderer.fancyFogAvailable = GL.getCapabilities().GL_NV_fog_distance;
-			
-			if (!LodRenderer.fancyFogAvailable)
-			{
-				ClientProxy.LOGGER.info("This GPU does not support GL_NV_fog_distance. This means that fancy fog options will not be available.");
-			}
-		});
-		
-		// This will be run on the main thread when it is able.
-		// If it wasn't run on the main thread GL.getCapabilities()
-		// would fail.
-		DeferredWorkQueue.runLater(setFancyFog);
 	}
 	
 	
diff --git a/src/main/java/com/seibel/lod/render/LodRenderer.java b/src/main/java/com/seibel/lod/render/LodRenderer.java
index 3eaf261d4..81f902225 100644
--- a/src/main/java/com/seibel/lod/render/LodRenderer.java
+++ b/src/main/java/com/seibel/lod/render/LodRenderer.java
@@ -22,6 +22,7 @@ import java.nio.ByteOrder;
 import java.nio.FloatBuffer;
 import java.util.HashSet;
 
+import org.lwjgl.opengl.GL;
 import org.lwjgl.opengl.GL11;
 import org.lwjgl.opengl.NVFogDistance;
 
@@ -87,7 +88,7 @@ public class LodRenderer
 	public static final int MAX_ALOCATEABLE_DIRECT_MEMORY = 64 * 1024 * 1024;
 	
 	/** Does this computer's GPU support fancy fog? */
-	public static boolean fancyFogAvailable = false;
+	private static Boolean fancyFogAvailable = null;
 	
 	
 	
@@ -174,6 +175,20 @@ public class LodRenderer
 		profiler = newProfiler;
 		profiler.push("LOD setup");
 		
+		
+		// only check the GPU capability's once
+		if (fancyFogAvailable == null)
+		{
+			// see if this GPU can run fancy fog
+			fancyFogAvailable = GL.getCapabilities().GL_NV_fog_distance;
+			
+			if (!LodRenderer.fancyFogAvailable)
+			{
+				ClientProxy.LOGGER.info("This GPU does not support GL_NV_fog_distance. This means that fancy fog options will not be available.");
+			}
+		}
+		
+		
 		ClientPlayerEntity player = mc.player;
 		
 		// should LODs be regenerated?
@@ -405,7 +420,7 @@ public class LodRenderer
 		
 		
 		// determine the fog distance mode to use
-		int glFogDistanceMode = NVFogDistance.GL_EYE_RADIAL_NV;
+		int glFogDistanceMode;
 		if (fogQuality == FogQuality.FANCY)
 		{
 			// fancy fog (fragment distance based fog)