gtk_openGLWidget defines an OpenGL capable GtkWidget This is a simple implementation of GtkGlExt to create an OpenGL surface that is a full GtkWidget. When creating such a widget, one should give then a RedrawMethod() to tell the widget how to redraw itself when needed. The current implementation is working on X11 and Win32. @width: @height: @data: @contextIsDirect: @Returns: @render: @render: @render: @Returns: @render: @method: @data: @render: @width: @height: @offScreen: @Returns: @Returns: