Added osg::ScissorIndexed that wraps up glScissorIndexed function

include/osg/ScissorIndexed

@@ -0,0 +1,100 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2016 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_ScissorIndexed
+#define OSG_ScissorIndexed 1
+
+#include <osg/Depth>
+
+namespace osg {
+
+/** Encapsulates glScissorIndexed function : the index version of glDepth
+*/
+class OSG_EXPORT ScissorIndexed : public osg::StateAttribute
+{
+    public :
+
+        ScissorIndexed();
+
+        ScissorIndexed(unsigned int index, float x, float y, float width, float height):
+            _index(index),
+            _x(x),
+            _y(y),
+            _width(width),
+            _height(height) {}
+
+        /** Copy constructor using CopyOp to manage deep vs shallow copy. */
+        ScissorIndexed(const ScissorIndexed& dp,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
+            StateAttribute(dp,copyop),
+            _index(dp._index),
+            _x(dp._x),
+            _y(dp._y),
+            _width(dp._width),
+            _height(dp._height) {}
+
+        META_StateAttribute(osg, ScissorIndexed, SCISSORINDEXED);
+
+        /** 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_Parameter macros below.
+            COMPARE_StateAttribute_Types(ScissorIndexed,sa)
+
+            COMPARE_StateAttribute_Parameter(_index);
+            COMPARE_StateAttribute_Parameter(_x)
+            COMPARE_StateAttribute_Parameter(_y)
+            COMPARE_StateAttribute_Parameter(_width)
+            COMPARE_StateAttribute_Parameter(_height)
+
+            return 0;
+        }
+
+        /** Return the buffer index as the member identifier.*/
+        virtual unsigned int getMember() const { return _index; }
+
+        /** Set the index of the ScissorIndexed. */
+        void setIndex(unsigned int index);
+
+        /** Get the index of the ScissorIndexed. */
+        unsigned int getIndex() const { return _index; }
+
+        inline void setX(float x) { _x=x; }
+        inline float getX() const { return _x; }
+
+        inline void setY(float y) { _y=y; }
+        inline float getY() const { return _y; }
+
+        inline void setWidth(float w) { _width=w; }
+        inline float getWidth() const { return _width; }
+
+        inline void setHeight(float height) { _height=height; }
+        inline float getHeight() const { return _height; }
+
+        virtual void apply(State& state) const;
+
+    protected:
+
+        virtual ~ScissorIndexed();
+
+        unsigned int    _index;
+        float           _x;
+        float           _y;
+        float           _width;
+        float           _height;
+
+};
+
+}
+
+#endif

include/osg/StateAttribute

@@ -204,7 +204,9 @@ class OSG_EXPORT StateAttribute : public Object
 
             INDIRECTDRAWBUFFERBINDING,
 
+            VIEWPORTINDEXED,
             DEPTHRANGEINDEXED,
+            SCISSORINDEXED,
 
             CAPABILITY = 100
         };

include/osg/ViewportIndexed

@@ -35,7 +35,7 @@ class OSG_EXPORT ViewportIndexed : public Viewport
             Viewport(cm,copyop),
             _index(cm._index) {}
 
-        META_StateAttribute(osg, ViewportIndexed, VIEWPORT);
+        META_StateAttribute(osg, ViewportIndexed, VIEWPORTINDEXED);
 
         /** Return -1 if *this < *rhs, 0 if *this==*rhs, 1 if *this>*rhs. */
         virtual int compare(const StateAttribute& sa) const

src/osg/CMakeLists.txt

@@ -147,6 +147,7 @@ SET(TARGET_H
     ${HEADER_PATH}/RenderInfo
     ${HEADER_PATH}/SampleMaski
     ${HEADER_PATH}/Scissor
+    ${HEADER_PATH}/ScissorIndexed
     ${HEADER_PATH}/ScriptEngine
     ${HEADER_PATH}/Sequence
     ${HEADER_PATH}/ShadeModel
@@ -348,6 +349,7 @@ SET(TARGET_SRC
     Referenced.cpp
     SampleMaski.cpp
     Scissor.cpp
+    ScissorIndexed.cpp
     ScriptEngine.cpp
     Sequence.cpp
     ShadeModel.cpp

src/osg/ScissorIndexed.cpp

@@ -0,0 +1,57 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2014 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/ScissorIndexed>
+#include <osg/GLExtensions>
+#include <osg/State>
+
+using namespace osg;
+
+ScissorIndexed::ScissorIndexed():
+    _index(0),
+    _x(0.0f),
+    _y(0.0f),
+    _width(800.0f),
+    _height(600.0f) // defaults same as osg::Viewport and osg::Scissor
+{
+}
+
+ScissorIndexed::~ScissorIndexed()
+{
+}
+
+void ScissorIndexed::setIndex(unsigned int index)
+{
+    if (_index==index) return;
+
+    ReassignToParents needToReassingToParentsWhenMemberValueChanges(this);
+
+    _index = index;
+}
+
+void ScissorIndexed::apply(State& state) const
+{
+    const GLExtensions* extensions = state.get<GLExtensions>();
+    if (extensions->glScissorIndexed)
+    {
+        extensions->glScissorIndexed(static_cast<GLuint>(_index),
+                                     static_cast<GLfloat>(_x),
+                                     static_cast<GLfloat>(_y),
+                                     static_cast<GLfloat>(_width),
+                                     static_cast<GLfloat>(_height));
+    }
+    else
+    {
+        OSG_WARN<<"Warning: ScissorIndexed::apply(..) failed, glScissorIndexed is not support by OpenGL driver."<<std::endl;
+    }
+}
+