From Frederic Marmond, add osg::LogicOp for support for glLogicOp.

src/osg/GNUmakefile

@@ -46,6 +46,7 @@ CXXFILES =\
 	Impostor.cpp\
 	ImpostorSprite.cpp\
 	LOD.cpp\
+	LogicOp.cpp\
 	Light.cpp\
 	LightModel.cpp\
 	LightSource.cpp\

src/osg/LogicOp.cpp

@@ -0,0 +1,35 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield 
+ *
+ * This library is open source and may be redistributed and/or modified under  
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or 
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
+ * OpenSceneGraph Public License for more details.
+*/
+#include <osg/LogicOp>
+
+using namespace osg;
+
+LogicOp::LogicOp():
+    _opcode(COPY)
+{
+}
+
+LogicOp::LogicOp(GLenum opcode):
+    _opcode(opcode)
+{
+}
+
+LogicOp::~LogicOp()
+{
+}
+
+void LogicOp::apply(State&) const
+{
+    glLogicOp(_opcode);
+}
+