Creates a new gdk.GLContext matching the
framebuffer format to the visual of the gdk.Window The context
is disconnected from any particular window or surface.
If the creation of the gdk.GLContext failed, error will be set.
Before using the returned gdk.GLContext, you will need to
call gdk_gl_context_make_current() or gdk_gl_context_realize().
Creates a new gdk.GLContext matching the framebuffer format to the visual of the gdk.Window The context is disconnected from any particular window or surface.
If the creation of the gdk.GLContext failed, error will be set.
Before using the returned gdk.GLContext, you will need to call gdk_gl_context_make_current() or gdk_gl_context_realize().