Ensures that the GdkGLContext used by @area is associated with the GtkGLArea.
This function is automatically called before emitting the [signal@Gtk.GLArea::render] signal, and doesn't normally need to be called by application code.
See Implementation
Ensures that the GdkGLContext used by @area is associated with the GtkGLArea.
This function is automatically called before emitting the [signal@Gtk.GLArea::render] signal, and doesn't normally need to be called by application code.