Ensures that the #GdkGLContext used by @area is associated with the #GtkGLArea.
This function is automatically called before emitting the #GtkGLArea::render signal, and doesn't normally need to be called by application code.
3.16
See Implementation
Ensures that the #GdkGLContext used by @area is associated with the #GtkGLArea.
This function is automatically called before emitting the #GtkGLArea::render signal, and doesn't normally need to be called by application code.