[Bf-blender-cvs] [79d8f1e] master: Fix T37955: Freestyle render misalignment

[Sergey Sharybin]

Commit: 79d8f1e4a5ca824b7c2d8f1f0106818c68cbbfa1
Author: Sergey Sharybin
Date:   Fri Dec 27 02:30:48 2013 +0600
https://developer.blender.org/rB79d8f1e4a5ca824b7c2d8f1f0106818c68cbbfa1

Fix T37955: Freestyle render misalignment

Issue was caused by missing objects update for temporary
freestyle objects. This happened because of the fact that
such objects doesn't have any relations, as in they're
corresponding to root nodes in the DAG.

This situation wasn't handled by DAG_threaded_update_begin()
which considered there's only one root node in the DAG.

===================================================================

M	source/blender/blenkernel/intern/depsgraph.c

===================================================================

diff --git a/source/blender/blenkernel/intern/depsgraph.c b/source/blender/blenkernel/intern/depsgraph.c
index 8074d6b..6376878 100644
--- a/source/blender/blenkernel/intern/depsgraph.c
+++ b/source/blender/blenkernel/intern/depsgraph.c
@@ -2735,7 +2735,7 @@ void DAG_threaded_update_begin(Scene *scene,
                                void (*func)(void *node, void *user_data),
                                void *user_data)
 {
-	DagNode *node, *root_node;
+	DagNode *node;
 
 	/* We reset num_pending_parents to zero first and tag node as not scheduled yet... */
 	for (node = scene->theDag->DagNode.first; node; node = node->next) {
@@ -2756,10 +2756,15 @@ void DAG_threaded_update_begin(Scene *scene,
 		}
 	}
 
-	/* Add root node to the queue. */
-	root_node = scene->theDag->DagNode.first;
-	root_node->scheduled = true;
-	func(root_node, user_data);
+	/* Add root nodes to the queue. */
+	BLI_spin_lock(&threaded_update_lock);
+	for (node = scene->theDag->DagNode.first; node; node = node->next) {
+		if (node->num_pending_parents == 0) {
+			node->scheduled = true;
+			func(node, user_data);
+		}
+	}
+	BLI_spin_unlock(&threaded_update_lock);
 }
 
 /* This function is called when handling node is done.