Fix T79816: Restore scene.statistics() BPY function

This RNA/BPY function was removed in c08d84748804. For understandable
reasons really-- getting scene statistics from a string displayed in the
status bar is not exactly the best design. But we have committed to not
changing the RNA API too much for the 2.90 release, so we would like to
keep this functionality.

Differential Revision: https://developer.blender.org/D8604

Reviewd by: Julian Eisel

2 files changed, 22 insertions, 2 deletions

diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index 66698d60423..4bb7b7d9558 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -924,6 +924,13 @@ static void rna_Scene_volume_update(Main *UNUSED(bmain), Scene *UNUSED(scene), P
   DEG_id_tag_update(&scene->id, ID_RECALC_AUDIO_VOLUME | ID_RECALC_SEQUENCER_STRIPS);
 }
 
+static const char *rna_Scene_statistics_string_get(Scene *scene,
+                                                   Main *bmain,
+                                                   ViewLayer *view_layer)
+{
+  return ED_info_statistics_string(bmain, scene, view_layer);
+}
+
 static void rna_Scene_framelen_update(Main *UNUSED(bmain), Scene *scene, PointerRNA *UNUSED(ptr))
 {
   scene->r.framelen = (float)scene->r.framapto / (float)scene->r.images;
@@ -7277,6 +7284,9 @@ void RNA_def_scene(BlenderRNA *brna)
   StructRNA *srna;
   PropertyRNA *prop;
 
+  FunctionRNA *func;
+  PropertyRNA *parm;
+
   static const EnumPropertyItem audio_distance_model_items[] = {
       {0, "NONE", 0, "None", "No distance attenuation"},
       {1, "INVERSE", 0, "Inverse", "Inverse distance model"},
@@ -7668,6 +7678,14 @@ void RNA_def_scene(BlenderRNA *brna)
   RNA_def_property_update(prop, NC_SCENE, NULL);
   RNA_def_property_update(prop, NC_SCENE, "rna_Scene_volume_update");
 
+  /* Statistics */
+  func = RNA_def_function(srna, "statistics", "rna_Scene_statistics_string_get");
+  RNA_def_function_flag(func, FUNC_USE_MAIN);
+  parm = RNA_def_pointer(func, "view_layer", "ViewLayer", "View Layer", "");
+  RNA_def_parameter_flags(parm, PROP_NEVER_NULL, PARM_REQUIRED);
+  parm = RNA_def_string(func, "statistics", NULL, 0, "Statistics", "");
+  RNA_def_function_return(func, parm);
+
   /* Grease Pencil */
   prop = RNA_def_property(srna, "grease_pencil", PROP_POINTER, PROP_NONE);
   RNA_def_property_pointer_sdna(prop, NULL, "gpd");
diff --git a/source/blender/makesrna/intern/rna_screen.c b/source/blender/makesrna/intern/rna_screen.c
index 24c4818694f..842fa64e680 100644
--- a/source/blender/makesrna/intern/rna_screen.c
+++ b/source/blender/makesrna/intern/rna_screen.c
@@ -288,9 +288,11 @@ static void rna_View2D_view_to_region(
   }
 }
 
-static const char *rna_Screen_statusbar_info_get(struct bScreen *screen, Main *bmain, bContext *C)
+static const char *rna_Screen_statusbar_info_get(struct bScreen *UNUSED(screen),
+                                                 Main *bmain,
+                                                 bContext *C)
 {
-  return ED_info_statusbar_string(bmain, screen, C);
+  return ED_info_statusbar_string(bmain, CTX_data_scene(C), CTX_data_view_layer(C));
 }
 
 #else