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, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_render.c b/source/blender/makesrna/intern/rna_render.c
index 2ed06516c55..530d162b1fe 100644
--- a/source/blender/makesrna/intern/rna_render.c
+++ b/source/blender/makesrna/intern/rna_render.c
@@ -372,6 +372,10 @@ static void rna_def_render_engine(BlenderRNA *brna)
 	RNA_def_property_boolean_negative_sdna(prop, NULL, "type->flag", RE_USE_POSTPROCESS);
 	RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
 
+	prop= RNA_def_property(srna, "bl_use_shading_nodes", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_sdna(prop, NULL, "type->flag", RE_USE_SHADING_NODES);
+	RNA_def_property_flag(prop, PROP_REGISTER_OPTIONAL);
+
 	RNA_define_verify_sdna(1);
 }
 
diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index ce62550feeb..63fce2d9edb 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -838,6 +838,12 @@ static int rna_RenderSettings_multiple_engines_get(PointerRNA *UNUSED(ptr))
 	return (BLI_countlist(&R_engines) > 1);
 }
 
+static int rna_RenderSettings_use_shading_nodes_get(PointerRNA *ptr)
+{
+	Scene *scene= (Scene*)ptr->id.data;
+	return scene_use_new_shading_nodes(scene);
+}
+
 static int rna_RenderSettings_use_game_engine_get(PointerRNA *ptr)
 {
 	RenderData *rd= (RenderData*)ptr->data;
@@ -3227,6 +3233,11 @@ static void rna_def_scene_render_data(BlenderRNA *brna)
 	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Multiple Engines", "More than one rendering engine is available");
 
+	prop= RNA_def_property(srna, "use_shading_nodes", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_funcs(prop, "rna_RenderSettings_use_shading_nodes_get", NULL);
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Use Shading Nodes", "Active render engine uses new shading nodes system");
+
 	prop= RNA_def_property(srna, "use_game_engine", PROP_BOOLEAN, PROP_NONE);
 	RNA_def_property_boolean_funcs(prop, "rna_RenderSettings_use_game_engine_get", NULL);
 	RNA_def_property_clear_flag(prop, PROP_EDITABLE);