Depsgraph: New dependency graph integration commit

This commit integrates the work done so far on the new dependency graph system,
where goal was to replace legacy depsgraph with the new one, supporting loads of
neat features like:

- More granular dependency relation nature, which solves issues with fake cycles
  in the dependencies.

- Move towards all-animatable, by better integration of drivers into the system.

- Lay down some basis for upcoming copy-on-write, overrides and so on.

The new system is living side-by-side with the previous one and disabled by
default, so nothing will become suddenly broken. The way to enable new depsgraph
is to pass `--new-depsgraph` command line argument.

It's a bit early to consider the system production-ready, there are some TODOs
and issues were discovered during the merge period, they'll be addressed ASAP.
But it's important to merge, because it's the only way to attract artists to
really start testing this system.

There are number of assorted documents related on the design of the new system:

* http://wiki.blender.org/index.php/User:Aligorith/GSoC2013_Depsgraph#Design_Documents
* http://wiki.blender.org/index.php/User:Nazg-gul/DependencyGraph

There are also some user-related information online:

* http://code.blender.org/2015/02/blender-dependency-graph-branch-for-users/
* http://code.blender.org/2015/03/more-dependency-graph-tricks/

Kudos to everyone who was involved into the project:

- Joshua "Aligorith" Leung -- design specification, initial code
- Lukas "lukas_t" Toenne -- integrating code into blender, with further fixes
- Sergey "Sergey" "Sharybin" -- some mocking around, trying to wrap up the
  project and so
- Bassam "slikdigit" Kurdali -- stressing the new system, reporting all the
  issues and recording/writing documentation.
- Everyone else who i forgot to mention here :)

6 files changed, 19 insertions, 2 deletions

diff --git a/source/blender/editors/space_view3d/CMakeLists.txt b/source/blender/editors/space_view3d/CMakeLists.txt
index ab69e67361d..d8d29d63686 100644
--- a/source/blender/editors/space_view3d/CMakeLists.txt
+++ b/source/blender/editors/space_view3d/CMakeLists.txt
@@ -30,6 +30,7 @@ set(INC
 	../../makesrna
 	../../render/extern/include
 	../../windowmanager
+	../../depsgraph
 	../../../../intern/guardedalloc
 	../../../../intern/glew-mx
 	../../../../intern/smoke/extern
diff --git a/source/blender/editors/space_view3d/SConscript b/source/blender/editors/space_view3d/SConscript
index a21da940906..78f24948070 100644
--- a/source/blender/editors/space_view3d/SConscript
+++ b/source/blender/editors/space_view3d/SConscript
@@ -48,6 +48,7 @@ incs = [
     '../../makesrna',
     '../../render/extern/include',
     '../../windowmanager',
+    '../../depsgraph',
     ]
 
 if env['WITH_BF_PYTHON']:
diff --git a/source/blender/editors/space_view3d/space_view3d.c b/source/blender/editors/space_view3d/space_view3d.c
index bd070ea25fb..096d9e8a40a 100644
--- a/source/blender/editors/space_view3d/space_view3d.c
+++ b/source/blender/editors/space_view3d/space_view3d.c
@@ -74,6 +74,8 @@
 #  include "BPY_extern.h"
 #endif
 
+#include "DEG_depsgraph.h"
+
 #include "view3d_intern.h"  /* own include */
 
 /* ******************** manage regions ********************* */
@@ -931,7 +933,8 @@ static void view3d_main_area_listener(bScreen *sc, ScrArea *sa, ARegion *ar, wmN
 					    (ob && (ob->mode == OB_MODE_TEXTURE_PAINT)) ||
 					    (v3d->drawtype == OB_TEXTURE &&
 					     (scene->gm.matmode == GAME_MAT_GLSL ||
-					      BKE_scene_use_new_shading_nodes(scene))))
+					      BKE_scene_use_new_shading_nodes(scene))) ||
+					    !DEG_depsgraph_use_legacy())
 					{
 						ED_region_tag_redraw(ar);
 					}
@@ -954,7 +957,8 @@ static void view3d_main_area_listener(bScreen *sc, ScrArea *sa, ARegion *ar, wmN
 			switch (wmn->data) {
 				case ND_LIGHTING:
 					if ((v3d->drawtype == OB_MATERIAL) ||
-					    (v3d->drawtype == OB_TEXTURE && (scene->gm.matmode == GAME_MAT_GLSL)))
+					    (v3d->drawtype == OB_TEXTURE && (scene->gm.matmode == GAME_MAT_GLSL)) ||
+					    !DEG_depsgraph_use_legacy())
 					{
 						ED_region_tag_redraw(ar);
 					}
diff --git a/source/blender/editors/transform/CMakeLists.txt b/source/blender/editors/transform/CMakeLists.txt
index 0c360474b78..0bc38f81dd7 100644
--- a/source/blender/editors/transform/CMakeLists.txt
+++ b/source/blender/editors/transform/CMakeLists.txt
@@ -55,6 +55,10 @@ if(WITH_INTERNATIONAL)
 	add_definitions(-DWITH_INTERNATIONAL)
 endif()
 
+if(WITH_LEGACY_DEPSGRAPH)
+	add_definitions(-DWITH_LEGACY_DEPSGRAPH)
+endif()
+
 add_definitions(${GL_DEFINITIONS})
 
 blender_add_lib(bf_editor_transform "${SRC}" "${INC}" "${INC_SYS}")
diff --git a/source/blender/editors/transform/SConscript b/source/blender/editors/transform/SConscript
index e249856b747..1a2e9ab074a 100644
--- a/source/blender/editors/transform/SConscript
+++ b/source/blender/editors/transform/SConscript
@@ -50,4 +50,7 @@ defs = env['BF_GL_DEFINITIONS']
 if env['WITH_BF_INTERNATIONAL']:
     defs.append('WITH_INTERNATIONAL')
 
+if env['WITH_BF_LEGACY_DEPSGRAPH']:
+    defs.append('WITH_LEGACY_DEPSGRAPH')
+
 env.BlenderLib ( 'bf_editors_transform', sources, incs, defs, libtype=['core'], priority=[40] )
diff --git a/source/blender/editors/transform/transform_conversions.c b/source/blender/editors/transform/transform_conversions.c
index 9efbc1bc549..4da3fa8a959 100644
--- a/source/blender/editors/transform/transform_conversions.c
+++ b/source/blender/editors/transform/transform_conversions.c
@@ -5362,7 +5362,9 @@ static void set_trans_object_base_flags(TransInfo *t)
 	}
 
 	/* all recalc flags get flushed to all layers, so a layer flip later on works fine */
+#ifdef WITH_LEGACY_DEPSGRAPH
 	DAG_scene_flush_update(G.main, t->scene, -1, 0);
+#endif
 
 	/* and we store them temporal in base (only used for transform code) */
 	/* this because after doing updates, the object->recalc is cleared */
@@ -5439,7 +5441,9 @@ static int count_proportional_objects(TransInfo *t)
 
 	/* all recalc flags get flushed to all layers, so a layer flip later on works fine */
 	DAG_scene_relations_update(G.main, t->scene);
+#ifdef WITH_LEGACY_DEPSGRAPH
 	DAG_scene_flush_update(G.main, t->scene, -1, 0);
+#endif
 
 	/* and we store them temporal in base (only used for transform code) */
 	/* this because after doing updates, the object->recalc is cleared */