Fixed for crashes on exit associaciated with VAO usage and vairous niche usage cases

include/osg/Object

@@ -25,7 +25,6 @@
 namespace osg {
 
 // forward declare
-class State;
 class UserDataContainer;
 class Node;
 class NodeVisitor;

include/osg/Referenced

@@ -30,6 +30,7 @@ namespace osg {
 class DeleteHandler;
 class Observer;
 class ObserverSet;
+class State;
 
 /** template class to help enforce static initialization order. */
 template <typename T, T M()>
@@ -115,7 +116,15 @@ class OSG_EXPORT Referenced
         /** Remove Observer that is observing this object.*/
         void removeObserver(Observer* observer) const;
 
-    public:
+         /** Resize any per context GLObject buffers to specified size. */
+        virtual void resizeGLObjectBuffers(unsigned int /*maxSize*/) {}
+
+        /** If State is non-zero, this function releases any associated OpenGL objects for
+           * the specified graphics context. Otherwise, releases OpenGL objects
+           * for all graphics contexts. */
+        virtual void releaseGLObjects(osg::State* = 0) const {}
+
+public:
 
         friend class DeleteHandler;
 

include/osg/View

@@ -161,6 +161,9 @@ class OSG_EXPORT View : public virtual osg::Object
 
         void updateSlaves();
 
+        virtual void resizeGLObjectBuffers(unsigned int maxSize);
+        virtual void releaseGLObjects(osg::State* = 0) const;
+
     protected :
 
         virtual ~View();

include/osgUtil/RenderLeaf

@@ -72,6 +72,16 @@ class OSGUTIL_EXPORT RenderLeaf : public osg::Referenced
 
         virtual void render(osg::RenderInfo& renderInfo,RenderLeaf* previous);
 
+        virtual void resizeGLObjectBuffers(unsigned int maxSize)
+        {
+            if (_drawable) _drawable->resizeGLObjectBuffers(maxSize);
+        }
+
+        virtual void releaseGLObjects(osg::State* state=0) const
+        {
+            if (_drawable) _drawable->releaseGLObjects(state);
+        }
+
         /// Allow StateGraph to change the RenderLeaf's _parent.
         friend class osgUtil::StateGraph;
 

include/osgUtil/SceneView

@@ -484,6 +484,9 @@ class OSGUTIL_EXPORT SceneView : public osg::Object, public osg::CullSettings
           * then need to be deleted in OpenGL by SceneView::flushAllDeleteGLObjects(). */
         virtual void releaseAllGLObjects();
 
+        virtual void resizeGLObjectBuffers(unsigned int maxSize);
+        virtual void releaseGLObjects(osg::State* = 0) const;
+
         /** Flush all deleted OpenGL objects, such as texture objects, display lists, etc.*/
         virtual void flushAllDeletedGLObjects();
 

include/osgUtil/StateGraph

@@ -43,8 +43,8 @@ class OSGUTIL_EXPORT StateGraph : public osg::Referenced
     public:
 
 
-        typedef std::map< const osg::StateSet*, osg::ref_ptr<StateGraph> >   ChildList;
-        typedef std::vector< osg::ref_ptr<RenderLeaf> >                 LeafList;
+        typedef std::map< const osg::StateSet*, osg::ref_ptr<StateGraph> >  ChildList;
+        typedef std::vector< osg::ref_ptr<RenderLeaf> >                     LeafList;
 
         StateGraph*                         _parent;
 
@@ -172,6 +172,42 @@ class OSGUTIL_EXPORT StateGraph : public osg::Referenced
         void prune();
 
 
+        void resizeGLObjectBuffers(unsigned int maxSize)
+        {
+            for(ChildList::iterator itr = _children.begin();
+                itr != _children.end();
+                ++itr)
+            {
+                (itr->second)->resizeGLObjectBuffers(maxSize);
+            }
+
+            for(LeafList::iterator itr = _leaves.begin();
+                itr != _leaves.end();
+                ++itr)
+            {
+                (*itr)->resizeGLObjectBuffers(maxSize);
+            }
+        }
+
+        void releaseGLObjects(osg::State* state=0) const
+        {
+            if (_stateset) _stateset->releaseGLObjects(state);
+
+            for(ChildList::const_iterator itr = _children.begin();
+                itr != _children.end();
+                ++itr)
+            {
+                (itr->second)->releaseGLObjects(state);
+            }
+
+            for(LeafList::const_iterator itr = _leaves.begin();
+                itr != _leaves.end();
+                ++itr)
+            {
+                (*itr)->releaseGLObjects(state);
+            }
+        }
+
         inline StateGraph* find_or_insert(const osg::StateSet* stateset)
         {
             // search for the appropriate state group, return it if found.

include/osgViewer/Renderer

@@ -60,6 +60,9 @@ class OSGVIEWER_EXPORT Renderer : public osg::GraphicsOperation
 
         virtual void compile();
 
+        virtual void resizeGLObjectBuffers(unsigned int maxSize);
+        virtual void releaseGLObjects(osg::State* = 0) const;
+
         void setCompileOnNextDraw(bool flag) { _compileOnNextDraw = flag; }
         bool getCompileOnNextDraw() const { return _compileOnNextDraw; }