[gegl] gegl_node_invalidated accept NULL as region to invalidate

[Øyvind Kolås <ok src gnome org>]

commit 70b8f04ecd6267cb88fd087966d01d1a97f47480
Author: �yvind Kolås <pippin gimp org>
Date:   Sun Dec 6 16:40:53 2009 +0000

    gegl_node_invalidated accept NULL as region to invalidate
    
    When passing NULL as the region to invalidate to gegl_node_invalidated
    or gegl_operation_invalidated, the entire current have_rect of the
    operation will be invalidated.

 gegl/graph/gegl-node.c          |    4 +++-
 gegl/operation/gegl-operation.h |   13 ++++++++++---
 2 files changed, 13 insertions(+), 4 deletions(-)
---
diff --git a/gegl/graph/gegl-node.c b/gegl/graph/gegl-node.c
index fc9e31e..0120d91 100644
--- a/gegl/graph/gegl-node.c
+++ b/gegl/graph/gegl-node.c
@@ -530,7 +530,9 @@ gegl_node_invalidated (GeglNode            *node,
                        gboolean             clear_cache)
 {
   g_return_if_fail (GEGL_IS_NODE (node));
-  g_return_if_fail (rect != NULL);
+
+  if (!rect)
+    rect = &node->have_rect;
 
   if (node->cache)
     {
diff --git a/gegl/operation/gegl-operation.h b/gegl/operation/gegl-operation.h
index d15953c..d0169e4 100644
--- a/gegl/operation/gegl-operation.h
+++ b/gegl/operation/gegl-operation.h
@@ -217,15 +217,22 @@ GParamSpec ** gegl_list_properties (const gchar *operation_type,
                                     guint       *n_properties_p);
 
 
+/* invalidate a specific rectangle, indicating the any computation depending
+ * on this roi is now invalid.
+ *
+ * @roi : the region to blank or NULL for the nodes current have_rect
+ * @clear_cache: whether any present caches should be zeroed out
+ */
+void     gegl_operation_invalidate            (GeglOperation       *operation,
+                                               const GeglRectangle *roi,
+                                               gboolean             clear_cache);
+
 /* internal utility functions used by gegl, these should not be used
  * externally */
 gboolean gegl_operation_calc_need_rects      (GeglOperation       *operation,
                                               gpointer             context_id);
 void     gegl_operation_path_prop_changed    (GeglPath            *path,
                                               GeglOperation       *operation);
-void     gegl_operation_invalidate            (GeglOperation       *operation,
-                                               const GeglRectangle *roi,
-                                               gboolean             clear_cache);
 
 G_END_DECLS