gtkglext: gtkglext (an OpenGL extension to GTK+) gtkglext: gtkglext: gtkglext provides additional GDK objects which support OpenGL gtkglext: rendering in GTK+ and GtkWidget API add-ons to make GTK+ widgets gtkglext: OpenGL-capable. In contrast to GtkGLArea, GtkGLExt provides a gtkglext: GtkWidget API that enables OpenGL drawing for standard and custom GTK+ gtkglext: widgets. gtkglext: gtkglext: gtkglext: gtkglext: