Workspace: Move engines to workspace and Properties Editor cleanup

Engine is not stored in WorkSpaces. That defines the "context" engine, which
is used for the entire UI.

The engine used for the poll of nodes (add node menu, new nodes when "Use Nodes")
is obtained from context.

Introduce a ViewRender struct for viewport settings that are defined for
workspaces and scene. This struct will be populated with the hand-picked
settings that can be defined per workspace as per the 2.8 design.

* use_scene_settings
* properties editor: workshop + organize context path

Use Scene Settings
==================
For viewport drawing, Workspaces have an option to use the Scene render
settings (F12) instead of the viewport settings.

This way users can quickly preview the final render settings, engine and
View Layer. This will affect all the editors in that workspace, and it will be
clearly indicated in the top-bar.

Properties Editor: Add Workspace and organize context path
==========================================================

We now have the properties of:

Scene, Scene > Layer, Scene > World, Workspace

[Scene | Workspace] > Render Layer > Object
[Scene | Workspace] > Render Layer > Object > Data
(...)

Reviewers: Campbell Barton, Julian Eisel
Differential Revision: https://developer.blender.org/D2842

3 files changed, 8 insertions, 3 deletions

diff --git a/source/blender/depsgraph/DEG_depsgraph.h b/source/blender/depsgraph/DEG_depsgraph.h
index 932a7c51286..e05b417f245 100644
--- a/source/blender/depsgraph/DEG_depsgraph.h
+++ b/source/blender/depsgraph/DEG_depsgraph.h
@@ -65,6 +65,7 @@ struct Main;
 
 struct PointerRNA;
 struct PropertyRNA;
+struct RenderEngineType;
 struct Scene;
 struct SceneLayer;
 
@@ -84,6 +85,7 @@ typedef struct EvaluationContext {
 	float ctime;
 
 	struct SceneLayer *scene_layer;
+	struct RenderEngineType *engine;
 } EvaluationContext;
 
 /* DagNode->eval_flags */
@@ -213,6 +215,7 @@ void DEG_evaluation_context_init(struct EvaluationContext *eval_ctx,
 void DEG_evaluation_context_init_from_scene(struct EvaluationContext *eval_ctx,
                                             struct Scene *scene,
                                             struct SceneLayer *scene_layer,
+                                            struct RenderEngineType *engine,
                                             eEvaluationMode mode);
 
 /* Free evaluation context. */
diff --git a/source/blender/depsgraph/intern/depsgraph_eval.cc b/source/blender/depsgraph/intern/depsgraph_eval.cc
index 77a32740524..9235069f531 100644
--- a/source/blender/depsgraph/intern/depsgraph_eval.cc
+++ b/source/blender/depsgraph/intern/depsgraph_eval.cc
@@ -79,10 +79,12 @@ void DEG_evaluation_context_init(EvaluationContext *eval_ctx,
 void DEG_evaluation_context_init_from_scene(EvaluationContext *eval_ctx,
                                             Scene *scene,
                                             SceneLayer *scene_layer,
+                                            RenderEngineType *engine,
                                             eEvaluationMode mode)
 {
 	DEG_evaluation_context_init(eval_ctx, mode);
 	eval_ctx->scene_layer = scene_layer;
+	eval_ctx->engine = engine;
 	eval_ctx->ctime = BKE_scene_frame_get(scene);
 }
 
diff --git a/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc b/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
index 03be601ce2c..e4f1e8b9cf6 100644
--- a/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
+++ b/source/blender/depsgraph/intern/eval/deg_eval_copy_on_write.cc
@@ -527,9 +527,9 @@ void update_copy_on_write_scene(const Depsgraph *depsgraph,
 		scene_cow->obedit = NULL;
 	}
 	/* Synchronize active render engine. */
-	BLI_strncpy_utf8(scene_cow->r.engine,
-	                 scene_orig->r.engine,
-	                 sizeof(scene_cow->r.engine));
+	BLI_strncpy_utf8(scene_cow->view_render.engine_id,
+	                 scene_orig->view_render.engine_id,
+	                 sizeof(scene_cow->view_render.engine_id));
 	/* TODO(sergey): What else do we need here? */
 }