RenderEngine/Nodes: system to check for shading nodes compatibility

* Scene.use_shading_nodes property to check if RenderEngine is using new shading
  nodes system, and RenderEngine.bl_use_shading_nodes to set this.
* Add mechanism for tagging nodes as being compatible with the old/new system.

2 files changed, 15 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/node.c b/source/blender/blenkernel/intern/node.c
index 824e59a82c5..f35f034387b 100644
--- a/source/blender/blenkernel/intern/node.c
+++ b/source/blender/blenkernel/intern/node.c
@@ -43,10 +43,11 @@
 #include <string.h>
 #include <limits.h>
 
+#include "DNA_action_types.h"
 #include "DNA_anim_types.h"
 #include "DNA_node_types.h"
+#include "DNA_node_types.h"
 #include "DNA_scene_types.h"
-#include "DNA_action_types.h"
 
 #include "BLI_string.h"
 #include "BLI_math.h"
@@ -1751,6 +1752,10 @@ void node_type_gpu_ext(struct bNodeType *ntype, int (*gpuextfunc)(struct GPUMate
 	ntype->gpuextfunc = gpuextfunc;
 }
 
+void node_type_compatibility(struct bNodeType *ntype, short compatibility)
+{
+	ntype->compatibility = compatibility;
+}
 
 static bNodeType *is_nodetype_registered(ListBase *typelist, int type) 
 {
diff --git a/source/blender/blenkernel/intern/scene.c b/source/blender/blenkernel/intern/scene.c
index 6b3786663df..c902bee80a8 100644
--- a/source/blender/blenkernel/intern/scene.c
+++ b/source/blender/blenkernel/intern/scene.c
@@ -72,6 +72,8 @@
 
 #include "BKE_sound.h"
 
+#include "RE_engine.h"
+
 //XXX #include "BIF_previewrender.h"
 //XXX #include "BIF_editseq.h"
 
@@ -1127,3 +1129,10 @@ Base *_setlooper_base_step(Scene **sce_iter, Base *base)
 
 	return NULL;
 }
+
+int scene_use_new_shading_nodes(Scene *scene)
+{
+	RenderEngineType *type= RE_engines_find(scene->r.engine);
+	return (type->flag & RE_USE_SHADING_NODES);
+}
+