From Julien Valentin, "To sum up changes, I had:

-some extensions in GLExtensions
  - GL_TEXTURE_BUFFER as target in osg::StateSet
  - a VBO based transform feed back example
"


git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14651 16af8721-9629-0410-8352-f15c8da7e697

src/osgWrappers/serializers/osg/Program.cpp

@@ -76,7 +76,51 @@ static bool writeShaders( osgDB::OutputStream& os, const osg::Program& attr )
     os << os.END_BRACKET << std::endl;
     return true;
 }
-
+// feedBackVaryings
+static bool checkFeedBackVaryingsName( const osg::Program& attr )
+{
+	return true;
+}
+static bool readFeedBackVaryingsName( osgDB::InputStream& is, osg::Program& attr )
+{
+	unsigned int size = is.readSize(); is >> is.BEGIN_BRACKET;
+	for ( unsigned int i=0; i<size; ++i )
+	{
+		std::string str;
+		is>> str;
+		attr.addTransformFeedBackVarying(str);
+	}
+	is >> is.END_BRACKET;
+	return true;
+}
+static bool writeFeedBackVaryingsName( osgDB::OutputStream& os, const osg::Program& attr )
+{
+	unsigned int size = attr.getNumTransformFeedBackVaryings();
+	os.writeSize(size); os << os.BEGIN_BRACKET << std::endl;
+	for ( unsigned int i=0; i<size; ++i )
+	{
+		os << attr.getTransformFeedBackVarying(i)<< std::endl;
+	}
+	os << os.END_BRACKET << std::endl;
+	return true;
+}
+// feedBack mode
+static bool checkFeedBackMode( const osg::Program& attr )
+{
+	return true;
+}
+static bool readFeedBackMode( osgDB::InputStream& is, osg::Program& attr )
+{
+	unsigned int size ;
+	is>>size;
+	attr.setTransformFeedBackMode(size);
+	return true;
+}
+static bool writeFeedBackMode( osgDB::OutputStream& os, const osg::Program& attr )
+{
+	os << attr.getTransformFeedBackMode()<< std::endl;
+	return true;
+}
 // _numGroupsX/Y/Z
 static bool checkComputeGroups( const osg::Program& attr )
 {
@@ -112,8 +156,15 @@ REGISTER_OBJECT_WRAPPER( Program,
     ADD_USER_SERIALIZER( GeometryVerticesOut );  // _geometryVerticesOut
     ADD_USER_SERIALIZER( GeometryInputType );  // _geometryInputType
     ADD_USER_SERIALIZER( GeometryOutputType );  // _geometryOutputType
+
     {
         UPDATE_TO_VERSION_SCOPED( 95 )
         ADD_USER_SERIALIZER( ComputeGroups );  // _numGroupsX/Y/Z
     }
+
+    {
+        UPDATE_TO_VERSION_SCOPED( 116 )
+        ADD_USER_SERIALIZER( FeedBackVaryingsName );
+        ADD_USER_SERIALIZER( FeedBackMode );
+    }
 }