Added osg::ScissorIndexed that wraps up glScissorIndexed function

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;
+    }
+}
+