/* This file is part of Dynamic Surroundings, licensed under the MIT License (MIT).
 *
 * Copyright (c) OreCruncher
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package org.blockartistry.DynSurround.client.sound;

import org.blockartistry.DynSurround.DSurround;
import org.blockartistry.DynSurround.ModOptions;
import org.lwjgl.opengl.Display;

import net.minecraft.client.Minecraft;
import net.minecraft.client.audio.SoundManager;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.gameevent.TickEvent;
import net.minecraftforge.fml.relauncher.Side;

@Mod.EventBusSubscriber(value = Side.CLIENT, modid = DSurround.MOD_ID)
public class BackgroundMute {

	@SubscribeEvent
	public static void clientTick(final TickEvent.ClientTickEvent event) {
		if (ModOptions.muteWhenBackground) {
			final SoundManager mgr = Minecraft.getMinecraft().getSoundHandler().sndManager;
			if (mgr instanceof SoundManagerReplacement) {
				final SoundManagerReplacement sm = (SoundManagerReplacement) mgr;

				final boolean active = Display.isActive();
				final boolean muted = sm.isMuted();

				if (active && muted) {
					sm.setMuted(false);
					DSurround.log().info("Unmuting sounds");
				} else if (!active && !muted) {
					sm.setMuted(true);
					DSurround.log().info("Muting sounds");
				}
			}
		}
	}
}

@@ -1865,16 +1865,99 @@
 vent) %7B%0A
+%09%09// Make sure that the display is created.  OpenEye says that sometimes it isn't.%0A
 %09%09if (Mo
@@ -1983,16 +1983,39 @@
 ckground
+ && Display.isCreated()
 ) %7B%0A%09%09%09f

Make sure display is created in mute processing