Todo/feature request

When using masks or other simple 3D elements in composites, doing
a layer re-rendering on a node is a bit clumsy all the time.

This commit does two things to help:
- new hotkey "Z" in node editor automatically finds render layer
  that changed and re-renders it + composites
- option "Auto Render" does same, but then after every transform
  edit in 3D window

The latter is experimental; real & proper system for this requires
full threaded render support (like previews). But it works!

Demo file:
http://download.blender.org/demo/test/auto_composite.blend

Important fix:
After any render, all the render layers were tagged "changed", which
caused any edit to first totally recomposte everthing. Now it only
composites changes.

Implementation notes

- DAG scene flush now sets 'changed' flags in render layer nodes
- Added notifier for 'transform finished' to trigger the update,
  this is temporarily.

1 files changed, 6 insertions, 2 deletions

diff --git a/source/blender/editors/transform/transform.c b/source/blender/editors/transform/transform.c
index 2d541b63bd0..394dd433060 100644
--- a/source/blender/editors/transform/transform.c
+++ b/source/blender/editors/transform/transform.c
@@ -338,7 +338,7 @@ static void viewRedrawForce(const bContext *C, TransInfo *t)
 	}
 }
 
-static void viewRedrawPost(TransInfo *t)
+static void viewRedrawPost(bContext *C, TransInfo *t)
 {
 	ED_area_headerprint(t->sa, NULL);
 	
@@ -346,6 +346,10 @@ static void viewRedrawPost(TransInfo *t)
 		/* if autokeying is enabled, send notifiers that keyframes were added */
 		if (IS_AUTOKEY_ON(t->scene))
 			WM_main_add_notifier(NC_ANIMATION|ND_KEYFRAME|NA_EDITED, NULL);
+		
+		/* XXX temp, first hack to get auto-render in compositor work (ton) */
+		WM_event_add_notifier(C, NC_SCENE|ND_TRANSFORM_DONE, CTX_data_scene(C));
+
 	}
 	
 #if 0 // TRANSFORM_FIX_ME
@@ -1817,7 +1821,7 @@ int transformEnd(bContext *C, TransInfo *t)
 		postTrans(C, t);
 
 		/* send events out for redraws */
-		viewRedrawPost(t);
+		viewRedrawPost(C, t);
 
 		/*  Undo as last, certainly after special_trans_update! */