destroy even more images when closing

src/itdelatrisu/opsu/GameData.java

@@ -42,7 +42,7 @@ import org.newdawn.slick.Animation;
 import org.newdawn.slick.Color;
 import org.newdawn.slick.Graphics;
 import org.newdawn.slick.Image;
-import yugecin.opsudance.Dancer;
+import yugecin.opsudance.utils.SlickUtil;
 
 /**
  * Holds game data and renders all related elements.
@@ -101,8 +101,16 @@ public class GameData {
 		 * This does NOT destroy images, so be careful of memory leaks!
 		 */
 		public static void clearReferences() {
-			for (Grade grade : Grade.values())
+			for (Grade grade : Grade.values()) {
 				grade.menuImage = null;
+			}
+		}
+
+		public static void destroyImages() {
+			for (Grade grade : Grade.values()) {
+				SlickUtil.destroyImage(grade.menuImage);
+				grade.menuImage = null;
+			}
 		}
 
 		/**

src/itdelatrisu/opsu/GameImage.java

@@ -28,6 +28,7 @@ import org.newdawn.slick.Animation;
 import org.newdawn.slick.Image;
 import org.newdawn.slick.SlickException;
 import org.newdawn.slick.util.ResourceLoader;
+import yugecin.opsudance.utils.SlickUtil;
 
 /**
  * Game images.
@@ -461,37 +462,18 @@ public enum GameImage {
 		}
 	}
 
-	public static void destroyAll() {
+	public static void destroyImages() {
 		for (GameImage img : GameImage.values()) {
-			destroyAll(img.defaultImages);
+			SlickUtil.destroyImages(img.defaultImages);
-			destroyImage(img.defaultImage);
+			SlickUtil.destroyImage(img.defaultImage);
-			destroyAll(img.skinImages);
+			SlickUtil.destroyImages(img.skinImages);
-			destroyImage(img.skinImage);
+			SlickUtil.destroyImage(img.skinImage);
 			img.isSkinned = false;
 			img.defaultImages = img.skinImages = null;
 			img.defaultImage = img.skinImage = null;
 		}
 	}
 
-	public static void destroyAll(Image[] imgs) {
-		if (imgs == null) {
-			return;
-		}
-		for (Image i : imgs) {
-			destroyImage(i);
-		}
-	}
-
-	public static void destroyImage(Image image) {
-		if (image == null) {
-			return;
-		}
-		try {
-			image.destroy();
-		} catch (SlickException ignored) {
-		}
-	}
-
 	/**
 	 * Returns the bitmask image type from a type string.
 	 * @param type the type string

src/itdelatrisu/opsu/beatmap/Beatmap.java

@@ -22,6 +22,7 @@ import itdelatrisu.opsu.Options;
 
 import java.io.File;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.LinkedList;
 import java.util.Map;
 
@@ -59,6 +60,14 @@ public class Beatmap implements Comparable<Beatmap> {
 	 */
 	public static void clearBackgroundImageCache() { bgImageCache.clear(); }
 
+	public static void destroyBackgroundImageCache() {
+		Collection<ImageLoader> values = bgImageCache.values();
+		for (ImageLoader value : values) {
+			value.destroy();
+		}
+		bgImageCache.clear();
+	}
+
 	/** The OSU File object associated with this beatmap. */
 	private File file;
 

src/yugecin/opsudance/core/DisplayContainer.java

@@ -17,9 +17,11 @@
  */
 package yugecin.opsudance.core;
 
+import itdelatrisu.opsu.GameData;
 import itdelatrisu.opsu.GameImage;
 import itdelatrisu.opsu.Options;
 import itdelatrisu.opsu.audio.MusicController;
+import itdelatrisu.opsu.beatmap.Beatmap;
 import itdelatrisu.opsu.ui.Fonts;
 import org.lwjgl.Sys;
 import org.lwjgl.openal.AL;
@@ -213,7 +215,9 @@ public class DisplayContainer implements ErrorDumpable, KeyListener, MouseListen
 
 	public void teardown() {
 		InternalTextureLoader.get().clear();
-		GameImage.destroyAll();
+		GameImage.destroyImages();
+		GameData.Grade.destroyImages();
+		Beatmap.destroyBackgroundImageCache();
 		Display.destroy();
 	}
 

src/yugecin/opsudance/utils/SlickUtil.java

@@ -0,0 +1,44 @@
+/*
+ * opsu!dance - fork of opsu! with cursordance auto
+ * Copyright (C) 2017 yugecin
+ *
+ * opsu!dance is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * opsu!dance is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with opsu!dance.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package yugecin.opsudance.utils;
+
+import org.newdawn.slick.Image;
+import org.newdawn.slick.SlickException;
+
+public class SlickUtil {
+
+	public static void destroyImages(Image[] imgs) {
+		if (imgs == null) {
+			return;
+		}
+		for (Image i : imgs) {
+			destroyImage(i);
+		}
+	}
+
+	public static void destroyImage(Image image) {
+		if (image == null) {
+			return;
+		}
+		try {
+			image.destroy();
+		} catch (SlickException ignored) {
+		}
+	}
+
+}