Retrieves required OpenGL version set as a requirement for the context
realization. It will not change even if a greater OpenGL version is supported
and used after the context is realized. See
gdk.glcontext.GLContext.getVersion for the real version in use.
Retrieves required OpenGL version set as a requirement for the context realization. It will not change even if a greater OpenGL version is supported and used after the context is realized. See gdk.glcontext.GLContext.getVersion for the real version in use.
See gdk.glcontext.GLContext.setRequiredVersion.