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, 3 insertions, 0 deletions

diff --git a/source/blender/editors/space_node/node_ops.c b/source/blender/editors/space_node/node_ops.c
index 781682c9185..db5c493dcd9 100644
--- a/source/blender/editors/space_node/node_ops.c
+++ b/source/blender/editors/space_node/node_ops.c
@@ -78,6 +78,7 @@ void node_operatortypes(void)
 	
 	WM_operatortype_append(NODE_OT_read_renderlayers);
 	WM_operatortype_append(NODE_OT_read_fullsamplelayers);
+	WM_operatortype_append(NODE_OT_render_changed);
 	
 	WM_operatortype_append(NODE_OT_backimage_move);
 	WM_operatortype_append(NODE_OT_backimage_zoom);
@@ -170,6 +171,8 @@ void node_keymap(struct wmKeyConfig *keyconf)
 	
 	WM_keymap_add_item(keymap, "NODE_OT_read_renderlayers", RKEY, KM_PRESS, KM_CTRL, 0);
 	WM_keymap_add_item(keymap, "NODE_OT_read_fullsamplelayers", RKEY, KM_PRESS, KM_SHIFT, 0);
+	WM_keymap_add_item(keymap, "NODE_OT_render_changed", ZKEY, KM_PRESS, 0, 0);
+	
 	
 	transform_keymap_for_space(keyconf, keymap, SPACE_NODE);
 }