# File gtkglext/sample/share-lists.rb, line 72 def expose_event(w) glcontext = w.gl_context gldrawable = w.gl_drawable gldrawable.gl_begin(glcontext) do GL.Clear(GL::COLOR_BUFFER_BIT | GL::DEPTH_BUFFER_BIT) GL.CallList(1) if gldrawable.double_buffered? gldrawable.swap_buffers else GL.Flush end true end end