From Wang Rui, "The new osgShadow and osgFX serializers are attached, and some

modifications of the osgShadow header naming styles as well. The
osgDB::Serializer header is also changed to add new Vec2 serializer
macros because of the needs of osgShadow classes. It should compile
fine on both Windows and Linux. But I have only done a few tests to
generate .osgb, .osgt and .osgx formats with these new wrappers."

src/osgWrappers/serializers/osgShadow/ShadowMap.cpp

@@ -0,0 +1,20 @@
+#include <osgShadow/ShadowMap>
+#include <osgDB/ObjectWrapper>
+#include <osgDB/InputStream>
+#include <osgDB/OutputStream>
+
+REGISTER_OBJECT_WRAPPER( osgShadow_ShadowMap,
+                         new osgShadow::ShadowMap,
+                         osgShadow::ShadowMap,
+                         "osg::Object osgShadow::ShadowTechnique osgShadow::ShadowMap" )
+{
+    ADD_UINT_SERIALIZER( TextureUnit, 1 );  // _shadowTextureUnit
+    ADD_VEC2_SERIALIZER( PolygonOffset, osg::Vec2f() );  // _polyOffset
+    ADD_VEC2_SERIALIZER( AmbientBias, osg::Vec2d() );  // _ambientBias
+    
+    ADD_SERIALIZER( (new osgDB::PropByRefSerializer<osgShadow::ShadowMap, osg::Vec2s>
+                    ("TextureSize", osg::Vec2s(1024, 1024),
+                     &osgShadow::ShadowMap::getTextureSize,
+                     &osgShadow::ShadowMap::setTextureSize))
+    );  // _textureSize
+}