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

include/osg/LogicOp

@@ -0,0 +1,119 @@
+/* -*-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.
+*/
+
+#ifndef OSG_LOGICOP
+#define OSG_LOGICOP 1
+
+#include <osg/StateAttribute>
+
+#ifndef GL_VERSION_1_2
+/* Logic Ops */
+#define GL_LOGIC_OP                             0x0BF1
+#define GL_INDEX_LOGIC_OP                       0x0BF1
+#define GL_COLOR_LOGIC_OP                       0x0BF2
+#define GL_LOGIC_OP_MODE                        0x0BF0
+#define GL_CLEAR                                0x1500
+#define GL_SET                                  0x150F
+#define GL_COPY                                 0x1503
+#define GL_COPY_INVERTED                        0x150C
+#define GL_NOOP                                 0x1505
+#define GL_INVERT                               0x150A
+#define GL_AND                                  0x1501
+#define GL_NAND                                 0x150E
+#define GL_OR                                   0x1507
+#define GL_NOR                                  0x1508
+#define GL_XOR                                  0x1506
+#define GL_EQUIV                                0x1509
+#define GL_AND_REVERSE                          0x1502
+#define GL_AND_INVERTED                         0x1504
+#define GL_OR_REVERSE                           0x150B
+#define GL_OR_INVERTED                          0x150D
+#endif
+
+
+
+namespace osg {
+
+/** Encapsulates OpenGL LogicOp state. */
+class SG_EXPORT LogicOp : public StateAttribute
+{
+    public :
+
+        LogicOp();
+        
+        LogicOp(GLenum opcode);
+
+        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
+        LogicOp(const LogicOp& trans,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
+            StateAttribute(trans,copyop),
+            _opcode(trans._opcode){}
+
+        META_StateAttribute(osg, LogicOp,LOGICOP);
+        
+        /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
+        virtual int compare(const StateAttribute& sa) const
+        {
+            // Check for equal types, then create the rhs variable
+            // used by the COMPARE_StateAttribute_Paramter macros below.
+            COMPARE_StateAttribute_Types(LogicOp,sa)
+
+            // Compare each parameter in turn against the rhs.
+            COMPARE_StateAttribute_Parameter(_opcode)
+
+            return 0; // Passed all the above comparison macros, so must be equal.
+        }
+
+        virtual bool getModeUsage(ModeUsage& usage) const
+        {
+            usage.usesMode(GL_COLOR_LOGIC_OP);
+            return true;
+        }
+
+        enum LogicOpOpcode {
+		CLEAR			= GL_CLEAR,
+		SET			= GL_SET,
+		COPY			= GL_COPY,
+		COPY_INVERTED		= GL_COPY_INVERTED,
+		NOOP			= GL_NOOP,
+		INVERT			= GL_INVERT,
+		AND			= GL_AND,
+		NAND			= GL_NAND,
+		OR			= GL_OR,
+		NOR			= GL_NOR,
+		XOR			= GL_XOR,
+		EQUIV			= GL_EQUIV,
+		AND_REVERSE		= GL_AND_REVERSE,
+		AND_INVERTED		= GL_AND_INVERTED,
+		OR_REVERSE		= GL_OR_REVERSE,
+		OR_INVERTED		= GL_OR_INVERTED
+        };
+
+        inline void setOpcode( GLenum opcode )
+        {
+            _opcode = opcode;
+        }
+
+        inline GLenum getOpcode() const { return _opcode; }
+        
+        virtual void apply(State& state) const;
+
+    protected :
+
+        virtual ~LogicOp();
+
+        GLenum _opcode;
+};
+
+}
+
+#endif

include/osg/StateAttribute

@@ -141,6 +141,7 @@ class SG_EXPORT StateAttribute : public Object
             TEXMAT,
             LIGHTMODEL,
             BLENDFUNC,
+	    LOGICOP,
             STENCIL,
             COLORMASK,
             DEPTH,