From Lukasz Izdebski,"added support for gl_SampleMaski."

src/osgWrappers/serializers/osg/SampleMaski.cpp

@@ -0,0 +1,35 @@
+#include <osg/SampleMaski>
+#include <osgDB/ObjectWrapper>
+#include <osgDB/InputStream>
+#include <osgDB/OutputStream>
+
+static bool checkMasks( const osg::SampleMaski& )
+{
+    return true;
+}
+
+static bool readMasks( osgDB::InputStream& is, osg::SampleMaski& attr )
+{
+    if ( is.getFileVersion() > 96 )
+    {
+        unsigned int mask0, mask1;
+        is >> mask0 >> mask1;
+        attr.setMask( mask0, 0 );
+        attr.setMask( mask1, 1 );
+    }
+    return true;
+}
+
+static bool writeMasks( osgDB::OutputStream& os, const osg::SampleMaski& attr )
+{
+    os << attr.getMask( 0u ) << attr.getMask( 1u ) << std::endl;
+    return true;
+}
+
+REGISTER_OBJECT_WRAPPER( SampleMaski,
+                         new osg::SampleMaski,
+                         osg::SampleMaski,
+                         "osg::Object osg::StateAttribute osg::SampleMaski" )
+{
+    ADD_USER_SERIALIZER( Masks );  //
+}