Add GLStateKeeper handling GLEventListenerState preservation and restauration for GLAutoDrawable

- New GLStateKeeper interface, package com.jogamp.opengl

  Implemented by:
    - GLAutoDrawableBase

  Currently supported by:
    - NEWT GLWindow

- GLEventListenerState package move:
   com.jogamp.opengl.util ->  com.jogamp.opengl

2 files changed, 7 insertions, 4 deletions

diff --git a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
index 33f136460..a6c655915 100644
--- a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
+++ b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
@@ -421,8 +421,8 @@ public class GLWindow extends GLAutoDrawableBase implements GLAutoDrawable, Wind
     protected class GLLifecycleHook implements WindowImpl.LifecycleHook {
 
         @Override
-        public void setPreserveResourcesAtDestroy() {
-            GLWindow.this.setPreserveGLStateAtDestroy(true);
+        public void preserveGLStateAtDestroy() {
+            GLWindow.this.preserveGLStateAtDestroy(true);
         }
         
         @Override
@@ -567,6 +567,9 @@ public class GLWindow extends GLAutoDrawableBase implements GLAutoDrawable, Wind
             setVisible(true);
         }
     }
+    
+    @Override
+    public final boolean isGLStatePreservationSupported() { return true; }
 
     //----------------------------------------------------------------------
     // GLDrawable methods
diff --git a/src/newt/classes/jogamp/newt/WindowImpl.java b/src/newt/classes/jogamp/newt/WindowImpl.java
index e1636ffcd..e5dd783ca 100644
--- a/src/newt/classes/jogamp/newt/WindowImpl.java
+++ b/src/newt/classes/jogamp/newt/WindowImpl.java
@@ -231,7 +231,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
          * Notifies the receiver to preserve resources (GL, ..)
          * for the next destroy*() calls (only).
          */
-        void setPreserveResourcesAtDestroy();
+        void preserveGLStateAtDestroy();
         
         /** 
          * Invoked before Window destroy action, 
@@ -966,7 +966,7 @@ public abstract class WindowImpl implements Window, NEWTEventConsumer
 
     protected void destroy(boolean preserveResources) {
         if( preserveResources && null != WindowImpl.this.lifecycleHook ) {
-            WindowImpl.this.lifecycleHook.setPreserveResourcesAtDestroy();
+            WindowImpl.this.lifecycleHook.preserveGLStateAtDestroy();
         }
         destroy();
     }