Addd support for maximum screen text size into osgText when auto scale to

screen is active.

Added osgautotransform demo.

src/osgText/Font.cpp

@@ -559,3 +559,27 @@ void Font::Glyph::subload() const
                      "\t                0x"<<(unsigned int)data()<<");"<<dec<<std::endl;
     }                    
 }
+
+void Font::Glyph::draw(osg::State& state) const
+{
+    GLuint& globj = _globjList[state.getContextID()];
+
+    // call the globj if already set otherwise compile and execute.
+    if( globj != 0 )
+    {
+        glCallList( globj );
+    }
+    else 
+    {
+        globj = glGenLists( 1 );
+        glNewList( globj, GL_COMPILE_AND_EXECUTE );
+
+        glPixelStorei(GL_UNPACK_ALIGNMENT,getPacking());
+        glDrawPixels(s(), t(),
+                     (GLenum)getPixelFormat(),
+                     (GLenum)getDataType(),
+                     data() );
+
+        glEndList();
+    }
+}