1 files changed, 148 insertions, 0 deletions
diff --git a/engine/src/core/com/jme3/util/NativeObjectManager.java b/engine/src/core/com/jme3/util/NativeObjectManager.java
new file mode 100644
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+++ b/engine/src/core/com/jme3/util/NativeObjectManager.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2009-2010 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package com.jme3.util;
+
+import java.lang.ref.PhantomReference;
+import java.lang.ref.ReferenceQueue;
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ * GLObjectManager tracks all GLObjects used by the Renderer. Using a
+ * <code>ReferenceQueue</code> the <code>GLObjectManager</code> can delete
+ * unused objects from GPU when their counterparts on the CPU are no longer used.
+ *
+ * On restart, the renderer may request the objects to be reset, thus allowing
+ * the GLObjects to re-initialize with the new display context.
+ */
+public class NativeObjectManager {
+
+    private static final Logger logger = Logger.getLogger(NativeObjectManager.class.getName());
+
+    /**
+     * The queue will receive notifications of {@link NativeObject}s which are no longer
+     * referenced.
+     */
+    private ReferenceQueue<Object> refQueue = new ReferenceQueue<Object>();
+
+    /**
+     * List of currently active GLObjects.
+     */
+    private ArrayList<NativeObjectRef> refList
+            = new ArrayList<NativeObjectRef>();
+
+    private class NativeObjectRef extends PhantomReference<Object>{
+        
+        private NativeObject objClone;
+        private WeakReference<NativeObject> realObj;
+
+        public NativeObjectRef(NativeObject obj){
+            super(obj.handleRef, refQueue);
+            assert obj.handleRef != null;
+
+            this.realObj = new WeakReference<NativeObject>(obj);
+            this.objClone = obj.createDestructableClone();       
+        }
+    }
+
+    /**
+     * Register a GLObject with the manager.
+     */
+    public void registerForCleanup(NativeObject obj){
+        NativeObjectRef ref = new NativeObjectRef(obj);
+        refList.add(ref);
+        if (logger.isLoggable(Level.FINEST))
+            logger.log(Level.FINEST, "Registered: {0}", new String[]{obj.toString()});
+    }
+
+    /**
+     * Deletes unused GLObjects
+     */
+    public void deleteUnused(Object rendererObject){
+        while (true){
+            NativeObjectRef ref = (NativeObjectRef) refQueue.poll();
+            if (ref == null)
+                return;
+
+            refList.remove(ref);
+            ref.objClone.deleteObject(rendererObject);
+            if (logger.isLoggable(Level.FINEST))
+                logger.log(Level.FINEST, "Deleted: {0}", ref.objClone);
+        }
+    }
+
+    /**
+     * Deletes all objects. Must only be called when display is destroyed.
+     */
+    public void deleteAllObjects(Object rendererObject){
+        deleteUnused(rendererObject);
+        for (NativeObjectRef ref : refList){
+            ref.objClone.deleteObject(rendererObject);
+            NativeObject realObj = ref.realObj.get();
+            if (realObj != null){
+                // Note: make sure to reset them as well
+                // They may get used in a new renderer in the future
+                realObj.resetObject();
+            }
+        }
+        refList.clear();
+    }
+
+    /**
+     * Resets all {@link NativeObject}s.
+     */
+    public void resetObjects(){
+        for (NativeObjectRef ref : refList){
+            // here we use the actual obj not the clone,
+            // otherwise its useless
+            NativeObject realObj = ref.realObj.get();
+            if (realObj == null)
+                continue;
+            
+            realObj.resetObject();
+            if (logger.isLoggable(Level.FINEST))
+                logger.log(Level.FINEST, "Reset: {0}", realObj);
+        }
+        refList.clear();
+    }
+
+//    public void printObjects(){
+//        System.out.println(" ------------------- ");
+//        System.out.println(" GL Object count: "+ objectList.size());
+//        for (GLObject obj : objectList){
+//            System.out.println(obj);
+//        }
+//    }
+}