[gegl] gegl: serialize opi per op when storing data

[Øyvind Kolås <ok src gnome org>]

commit 91f34a5e1a214b500b4c395315e272f6c9be31f4
Author: Øyvind Kolås <pippin gimp org>
Date:   Sun Mar 26 15:38:22 2017 +0200

    gegl: serialize opi per op when storing data

 bin/gegl.c             |    2 +-
 bin/ui.c               |    2 +-
 gegl/gegl-serialize.c  |    7 +++++++
 gegl/graph/gegl-node.c |   11 +++++++++++
 gegl/graph/gegl-node.h |    2 ++
 5 files changed, 22 insertions(+), 2 deletions(-)
---
diff --git a/bin/gegl.c b/bin/gegl.c
index d6cdc40..5553efe 100644
--- a/bin/gegl.c
+++ b/bin/gegl.c
@@ -221,7 +221,7 @@ main (gint    argc,
       {
         fprintf (stderr, "%s\n", gegl_serialize (iter,
             gegl_node_get_producer (proxy, "input", NULL), "/",
-            GEGL_SERIALIZE_TRIM_DEFAULTS));
+            GEGL_SERIALIZE_TRIM_DEFAULTS|GEGL_SERIALIZE_VERSION));
       }
     }
   }
diff --git a/bin/ui.c b/bin/ui.c
index f148611..cc082c9 100644
--- a/bin/ui.c
+++ b/bin/ui.c
@@ -1938,7 +1938,7 @@ static void save_cb (MrgEvent *event, void *data1, void *data2)
   gegl_node_link_many (load, o->source, NULL);
   {
     char *containing_path = get_path_parent (o->path);
-    serialized = gegl_serialize (NULL, o->sink, containing_path, GEGL_SERIALIZE_TRIM_DEFAULTS);
+    serialized = gegl_serialize (NULL, o->sink, containing_path, 
GEGL_SERIALIZE_TRIM_DEFAULTS|GEGL_SERIALIZE_VERSION);
     free (containing_path);
   }
   gegl_node_remove_child (o->gegl, load);
diff --git a/gegl/gegl-serialize.c b/gegl/gegl-serialize.c
index a258a91..1c79397 100644
--- a/gegl/gegl-serialize.c
+++ b/gegl/gegl-serialize.c
@@ -160,6 +160,12 @@ void gegl_create_chain_argv (char **ops, GeglNode *start, GeglNode *proxy, doubl
             else
               g_warning ("unknown id '%s'", value);
           }
+          else if (!strcmp (key, "opi"))
+          {
+            /* should do check, and at least warn if incompatible,
+               for now just ignore  */
+            g_print ("ignoring opi='%s'", value);
+          }
           else
           {
             unsigned int n_props = 0;
@@ -558,6 +564,7 @@ static gchar *gegl_serialize2 (GeglNode *start, GeglNode *end, const char *basep
     {
       GString *s2 = g_string_new ("");
       g_string_append_printf (s2, " %s", gegl_node_get_operation (iter));
+      g_string_append_printf (s2, " opi=%s", gegl_node_get_op_version (iter));
       {
         gint i;
         guint n_properties;
diff --git a/gegl/graph/gegl-node.c b/gegl/graph/gegl-node.c
index 87d4cc5..ba6fd9a 100644
--- a/gegl/graph/gegl-node.c
+++ b/gegl/graph/gegl-node.c
@@ -2214,3 +2214,14 @@ void gegl_node_progress (GeglNode *node,
     g_idle_add (delayed_emission, closure);
   }
 }
+
+const char *gegl_node_get_op_version (GeglNode *node)
+{
+  const gchar *ret = NULL;
+  g_return_val_if_fail (GEGL_IS_NODE (node), "error");
+
+  ret = gegl_operation_get_key (gegl_node_get_operation(node), "op-version");
+  if (!ret)
+    ret = "0:0";
+  return ret;
+}
diff --git a/gegl/graph/gegl-node.h b/gegl/graph/gegl-node.h
index 767745e..e93a61d 100644
--- a/gegl/graph/gegl-node.h
+++ b/gegl/graph/gegl-node.h
@@ -694,6 +694,8 @@ void           gegl_node_set_passthrough (GeglNode      *node,
 
 void       gegl_node_progress (GeglNode *node, gdouble progress, gchar *message);
 
+const char *gegl_node_get_op_version (GeglNode *node);
+
 G_END_DECLS
 
 #endif /* __GEGL_NODE_H__ */