Added Viewport State Attribute to .osg reader/writer

src/osgPlugins/osg/GNUmakefile

@@ -68,6 +68,7 @@ CXXFILES =\
         TextureCubeMap.cpp\
         Transform.cpp\
         VertexProgram.cpp\
+        Viewport.cpp\
 
 
 LIBS   += $(OSG_LIBS) $(OTHER_LIBS)

src/osgPlugins/osg/Viewport.cpp

@@ -0,0 +1,71 @@
+#include "osg/Viewport"
+
+#include "osgDB/Registry"
+#include "osgDB/Input"
+#include "osgDB/Output"
+
+using namespace osg;
+using namespace osgDB;
+
+// forward declare functions to use later.
+bool Viewport_readLocalData(Object& obj, Input& fr);
+bool Viewport_writeLocalData(const Object& obj, Output& fw);
+
+// register the read and write functions with the osgDB::Registry.
+RegisterDotOsgWrapperProxy g_ViewportProxy
+(
+    new osg::Viewport,
+    "Viewport",
+    "Object StateAttribute Viewport",
+    &Viewport_readLocalData,
+    &Viewport_writeLocalData
+);
+
+
+bool Viewport_readLocalData(Object& obj, Input& fr)
+{
+    bool iteratorAdvanced = false;
+    int x = 0, y = 0, width = 0, height = 0;
+
+
+    if (fr[0].matchWord("x") && fr[1].getInt(x))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    if (fr[0].matchWord("y") && fr[1].getInt(y))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    if (fr[0].matchWord("width") && fr[1].getInt(width))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    if (fr[0].matchWord("height") && fr[1].getInt(height))
+    {
+        fr+=2;
+        iteratorAdvanced = true;
+    }
+
+    Viewport& viewport = static_cast<Viewport&>(obj);
+    viewport.setViewport( x, y, width, height );
+    return iteratorAdvanced;
+}
+
+
+bool Viewport_writeLocalData(const Object& obj, Output& fw)
+{
+    const Viewport& viewport = static_cast<const Viewport&>(obj);
+
+    fw.indent() << "x " << viewport.x() << std::endl;
+    fw.indent() << "y " << viewport.y() << std::endl;
+    fw.indent() << "width " << viewport.width() << std::endl;
+    fw.indent() << "height " << viewport.height() << std::endl;
+
+    return true;
+}