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, 19 insertions, 8 deletions

diff --git a/source/blender/editors/include/ED_screen.h b/source/blender/editors/include/ED_screen.h
index f650ae879a5..e7a8583c50a 100644
--- a/source/blender/editors/include/ED_screen.h
+++ b/source/blender/editors/include/ED_screen.h
@@ -35,6 +35,7 @@
 #include "DNA_space_types.h"
 #include "DNA_view2d_types.h"
 #include "DNA_view3d_types.h"
+#include "DNA_workspace_types.h"
 
 #include "BLI_compiler_attrs.h"
 
@@ -92,7 +93,8 @@ int     ED_area_header_switchbutton(const struct bContext *C, struct uiBlock *bl
 void    ED_area_initialize(struct wmWindowManager *wm, struct wmWindow *win, struct ScrArea *sa);
 void    ED_area_exit(struct bContext *C, struct ScrArea *sa);
 int     ED_screen_area_active(const struct bContext *C);
-void    ED_area_do_listen(struct bScreen *sc, ScrArea *sa, struct wmNotifier *note, const Scene *scene);
+void    ED_area_do_listen(struct bScreen *sc, ScrArea *sa, struct wmNotifier *note, const Scene *scene,
+                          const struct WorkSpace *workspace);
 void    ED_area_tag_redraw(ScrArea *sa);
 void    ED_area_tag_redraw_regiontype(ScrArea *sa, int type);
 void    ED_area_tag_refresh(ScrArea *sa);
@@ -129,7 +131,8 @@ void    ED_screen_preview_render(const struct bScreen *screen, int size_x, int s
 struct WorkSpace *ED_workspace_add(
         struct Main *bmain,
         const char *name,
-        SceneLayer *act_render_layer) ATTR_NONNULL();
+        SceneLayer *act_render_layer,
+        struct ViewRender *view_render) ATTR_NONNULL();
 bool ED_workspace_change(
         struct WorkSpace *workspace_new,
         struct bContext *C,
diff --git a/source/blender/editors/include/ED_transform_snap_object_context.h b/source/blender/editors/include/ED_transform_snap_object_context.h
index b802694444b..babed92230c 100644
--- a/source/blender/editors/include/ED_transform_snap_object_context.h
+++ b/source/blender/editors/include/ED_transform_snap_object_context.h
@@ -30,6 +30,7 @@ struct BMEdge;
 struct BMFace;
 
 struct ListBase;
+struct RenderEngineType;
 struct Scene;
 struct SceneLayer;
 struct Main;
@@ -75,9 +76,9 @@ struct SnapObjectParams {
 
 typedef struct SnapObjectContext SnapObjectContext;
 SnapObjectContext *ED_transform_snap_object_context_create(
-        struct Main *bmain, struct Scene *scene, struct SceneLayer *sl, int flag);
+        struct Main *bmain, struct Scene *scene, struct SceneLayer *sl, struct RenderEngineType *engine, int flag);
 SnapObjectContext *ED_transform_snap_object_context_create_view3d(
-        struct Main *bmain, struct Scene *scene, struct SceneLayer *sl, int flag,
+        struct Main *bmain, struct Scene *scene, struct SceneLayer *sl, struct RenderEngineType *engine, int flag,
         /* extra args for view3d */
         const struct ARegion *ar, const struct View3D *v3d);
 void ED_transform_snap_object_context_destroy(SnapObjectContext *sctx);
diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index 0dcfd68c0f1..b55703bff0e 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -51,6 +51,7 @@ struct Nurb;
 struct Object;
 struct RV3DMatrixStore;
 struct RegionView3D;
+struct RenderEngineType;
 struct Scene;
 struct SceneLayer;
 struct ScrArea;
@@ -68,6 +69,7 @@ struct wmWindowManager;
 struct GPUFX;
 struct GPUOffScreen;
 struct GPUFXSettings;
+struct WorkSpace;
 enum eGPUFXFlags;
 
 /* for derivedmesh drawing callbacks, for view3d_select, .... */
@@ -75,6 +77,7 @@ typedef struct ViewContext {
 	struct Depsgraph *depsgraph;
 	struct Scene *scene;
 	struct SceneLayer *scene_layer;
+	struct RenderEngineType *engine;
 	struct Object *obact;
 	struct Object *obedit;
 	struct ARegion *ar;
@@ -369,9 +372,11 @@ void  ED_draw_object_facemap(const struct EvaluationContext *eval_ctx, struct Sc
 
 bool ED_view3d_context_activate(struct bContext *C);
 void ED_view3d_draw_offscreen_init(
-        const struct EvaluationContext *eval_ctx, struct Scene *scene, struct SceneLayer *sl, struct View3D *v3d);
+        const struct EvaluationContext *eval_ctx, struct Scene *scene,
+        struct SceneLayer *sl, struct View3D *v3d);
 void ED_view3d_draw_offscreen(
-        const struct EvaluationContext *eval_ctx, struct Scene *scene, struct SceneLayer *sl, struct View3D *v3d, struct ARegion *ar, int winx, int winy, float viewmat[4][4],
+        const struct EvaluationContext *eval_ctx, struct Scene *scene,
+        struct SceneLayer *scene_layer, struct View3D *v3d, struct ARegion *ar, int winx, int winy, float viewmat[4][4],
         float winmat[4][4], bool do_bgpic, bool do_sky, bool is_persp, const char *viewname,
         struct GPUFX *fx, struct GPUFXSettings *fx_settings,
         struct GPUOffScreen *ofs);
@@ -380,12 +385,14 @@ void ED_view3d_draw_setup_view(
         float viewmat[4][4], float winmat[4][4], const struct rcti *rect);
 
 struct ImBuf *ED_view3d_draw_offscreen_imbuf(
-        const struct EvaluationContext *eval_ctx, struct Scene *scene, struct SceneLayer *sl, struct View3D *v3d, struct ARegion *ar,
+        const struct EvaluationContext *eval_ctx, struct Scene *scene,
+        struct SceneLayer *scene_layer, struct View3D *v3d, struct ARegion *ar,
         int sizex, int sizey, unsigned int flag, bool draw_background,
         int alpha_mode, int samples, bool full_samples, const char *viewname,
         struct GPUFX *fx, struct GPUOffScreen *ofs, char err_out[256]);
 struct ImBuf *ED_view3d_draw_offscreen_imbuf_simple(
-        const struct EvaluationContext *eval_ctx, struct Scene *scene, struct SceneLayer *sl, struct Object *camera, int width, int height,
+        const struct EvaluationContext *eval_ctx, struct Scene *scene,
+        struct SceneLayer *scene_layer, struct Object *camera, int width, int height,
         unsigned int flag, int drawtype, bool use_solid_tex, bool use_gpencil, bool draw_background,
         int alpha_mode, int samples, bool full_samples, const char *viewname,
         struct GPUFX *fx, struct GPUOffScreen *ofs, char err_out[256]);