Identical if/else branch in gegl-init.c
if (!strcmp (value, "1")||
!strcmp (value, "true")||
!strcmp (value, "yes"))
g_object_set (config, "mipmap-rendering", TRUE, NULL);
else
g_object_set (config, "mipmap-rendering", TRUE, NULL);
https://gitlab.gnome.org/GNOME/gegl/-/blob/master/gegl/gegl-init.c#L274-279