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

1 files changed, 31 insertions, 4 deletions

diff --git a/source/blender/blenkernel/BKE_scene.h b/source/blender/blenkernel/BKE_scene.h
index e517b65cf3e..b31cd1742a2 100644
--- a/source/blender/blenkernel/BKE_scene.h
+++ b/source/blender/blenkernel/BKE_scene.h
@@ -50,7 +50,8 @@ struct Scene;
 struct SceneCollection;
 struct SceneLayer;
 struct UnitSettings;
-struct Main;
+struct ViewRender;
+struct WorkSpace;
 
 typedef enum eSceneCopyMethod {
 	SCE_COPY_NEW       = 0,
@@ -62,11 +63,21 @@ typedef enum eSceneCopyMethod {
 
 /* Use as the contents of a 'for' loop: for (SETLOOPER(...)) { ... */
 #define SETLOOPER(_sce_basis, _sce_iter, _base)                               \
-	_sce_iter = _sce_basis, _base = _setlooper_base_step(&_sce_iter, NULL);   \
+	_sce_iter = _sce_basis, _base = _setlooper_base_step(&_sce_iter, BKE_scene_layer_from_scene_get(_sce_basis), NULL); \
+	_base;                                                                    \
+	_base = _setlooper_base_step(&_sce_iter, NULL, _base)
+
+#define SETLOOPER_SCENE_LAYER(_sce_basis, _scene_layer, _sce_iter, _base)     \
+	_sce_iter = _sce_basis, _base = _setlooper_base_step(&_sce_iter, _scene_layer, NULL);   \
 	_base;                                                                    \
-	_base = _setlooper_base_step(&_sce_iter, _base)
+	_base = _setlooper_base_step(&_sce_iter, NULL, _base)
 
-struct Base *_setlooper_base_step(struct Scene **sce_iter, struct Base *base);
+#define SETLOOPER_SET_ONLY(_sce_basis, _sce_iter, _base)     \
+	_sce_iter = _sce_basis, _base = _setlooper_base_step(&_sce_iter, NULL, NULL);   \
+	_base;                                                                    \
+	_base = _setlooper_base_step(&_sce_iter, NULL, _base)
+
+struct Base *_setlooper_base_step(struct Scene **sce_iter, struct SceneLayer *scene_layer, struct Base *base);
 
 void free_avicodecdata(struct AviCodecData *acd);
 
@@ -168,6 +179,22 @@ int BKE_render_num_threads(const struct RenderData *r);
 
 int BKE_render_preview_pixel_size(const struct RenderData *r);
 
+/**********************************/
+
+struct ViewRender *BKE_viewrender_get(struct Scene *scene, struct WorkSpace *workspace);
+void BKE_viewrender_init(struct ViewRender *view_render);
+void BKE_viewrender_free(struct ViewRender *view_render);
+void BKE_viewrender_copy(struct ViewRender *view_render_dst, const struct ViewRender *view_render_src);
+bool BKE_viewrender_use_new_shading_nodes(const struct ViewRender *view_render);
+bool BKE_viewrender_use_shading_nodes_custom(const struct ViewRender *view_render);
+bool BKE_viewrender_use_world_space_shading(const struct ViewRender *view_render);
+bool BKE_viewrender_use_spherical_stereo(const struct ViewRender *view_render);
+bool BKE_viewrender_uses_blender_internal(const struct ViewRender *view_render);
+bool BKE_viewrender_uses_blender_game(const struct ViewRender *view_render);
+bool BKE_viewrender_uses_blender_eevee(const struct ViewRender *view_render);
+
+/**********************************/
+
 double BKE_scene_unit_scale(const struct UnitSettings *unit, const int unit_type, double value);
 
 /* multiview */