Moved ResourceHelper to registry package

Properly used ResourceHelper.freeAllResources() in onGuiClosed instead of GuiEventHandler

src/main/java/eu/crushedpixel/replaymod/registry/ResourceHelper.java

@@ -0,0 +1,51 @@
+package eu.crushedpixel.replaymod.registry;
+
+import eu.crushedpixel.replaymod.reflection.MCPNames;
+import net.minecraft.client.Minecraft;
+import net.minecraft.util.ResourceLocation;
+
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ResourceHelper {
+
+    private static BufferedImage defaultThumb;
+    private static List<ResourceLocation> openResources = new ArrayList<ResourceLocation>();
+
+    static {
+        try {
+            defaultThumb = ImageIO.read(MCPNames.class.getClassLoader().getResourceAsStream("default_thumb.jpg"));
+        } catch(Exception e) {
+            defaultThumb = new BufferedImage(1, 1, BufferedImage.TYPE_3BYTE_BGR);
+            e.printStackTrace();
+        }
+    }
+
+    public static void registerResource(ResourceLocation loc) {
+        openResources.add(loc);
+    }
+
+    public static void freeResource(ResourceLocation loc) {
+        Minecraft.getMinecraft().getTextureManager().deleteTexture(loc);
+        openResources.remove(loc);
+    }
+
+    public static void freeAllResources() {
+        Minecraft.getMinecraft().addScheduledTask(new Runnable() {
+            @Override
+            public void run() {
+                for(ResourceLocation loc : openResources) {
+                    Minecraft.getMinecraft().getTextureManager().deleteTexture(loc);
+                }
+
+                openResources = new ArrayList<ResourceLocation>();
+            }
+        });
+    }
+
+    public static BufferedImage getDefaultThumbnail() {
+        return defaultThumb;
+    }
+}