Merge branch 'blender-v3.0-release'

source/blender/blenkernel/intern/icons.cc

@@ -360,31 +360,23 @@ void BKE_previewimg_id_copy(ID *new_id, const ID *old_id)
 PreviewImage **BKE_previewimg_id_get_p(const ID *id)
 {
   switch (GS(id->name)) {
-    case ID_OB: {
-      Object *ob = (Object *)id;
-      /* Currently, only object types with real geometry can be rendered as preview. */
-      if (!OB_TYPE_IS_GEOMETRY(ob->type)) {
-        return nullptr;
-      }
-      return &ob->preview;
-    }
-
 #define ID_PRV_CASE(id_code, id_struct) \
   case id_code: { \
     return &((id_struct *)id)->preview; \
   } \
     ((void)0)
-      ID_PRV_CASE(ID_MA, Material);
-      ID_PRV_CASE(ID_TE, Tex);
-      ID_PRV_CASE(ID_WO, World);
-      ID_PRV_CASE(ID_LA, Light);
-      ID_PRV_CASE(ID_IM, Image);
-      ID_PRV_CASE(ID_BR, Brush);
-      ID_PRV_CASE(ID_GR, Collection);
-      ID_PRV_CASE(ID_SCE, Scene);
-      ID_PRV_CASE(ID_SCR, bScreen);
-      ID_PRV_CASE(ID_AC, bAction);
-      ID_PRV_CASE(ID_NT, bNodeTree);
+    ID_PRV_CASE(ID_OB, Object);
+    ID_PRV_CASE(ID_MA, Material);
+    ID_PRV_CASE(ID_TE, Tex);
+    ID_PRV_CASE(ID_WO, World);
+    ID_PRV_CASE(ID_LA, Light);
+    ID_PRV_CASE(ID_IM, Image);
+    ID_PRV_CASE(ID_BR, Brush);
+    ID_PRV_CASE(ID_GR, Collection);
+    ID_PRV_CASE(ID_SCE, Scene);
+    ID_PRV_CASE(ID_SCR, bScreen);
+    ID_PRV_CASE(ID_AC, bAction);
+    ID_PRV_CASE(ID_NT, bNodeTree);
 #undef ID_PRV_CASE
     default:
       break;

source/blender/editors/include/ED_render.h

@@ -82,6 +82,8 @@ typedef enum ePreviewRenderMethod {
 void ED_preview_ensure_dbase(void);
 void ED_preview_free_dbase(void);
 
+bool ED_preview_id_is_supported(const struct ID *id);
+
 void ED_preview_shader_job(const struct bContext *C,
                            void *owner,
                            struct ID *id,

source/blender/editors/interface/interface_icons.c

@@ -2037,11 +2037,22 @@ void UI_icon_render_id(
     const bContext *C, Scene *scene, ID *id, const enum eIconSizes size, const bool use_job)
 {
   PreviewImage *pi = BKE_previewimg_id_ensure(id);
-
   if (pi == NULL) {
     return;
   }
 
+  /* For objects, first try if a preview can created via the object data. */
+  if (GS(id->name) == ID_OB) {
+    Object *ob = (Object *)id;
+    if (ED_preview_id_is_supported(ob->data)) {
+      id = ob->data;
+    }
+  }
+
+  if (!ED_preview_id_is_supported(id)) {
+    return;
+  }
+
   ui_id_preview_image_render_size(C, scene, id, pi, size, use_job);
 }
 

source/blender/editors/render/render_preview.c

@@ -786,6 +786,11 @@ struct ObjectPreviewData {
   int sizey;
 };
 
+static bool object_preview_is_type_supported(const Object *ob)
+{
+  return OB_TYPE_IS_GEOMETRY(ob->type);
+}
+
 static Object *object_preview_camera_create(Main *preview_main,
                                             ViewLayer *view_layer,
                                             Object *preview_object)
@@ -1658,9 +1663,12 @@ static void icon_preview_startjob_all_sizes(void *customdata,
     if (ip->id != NULL) {
       switch (GS(ip->id->name)) {
         case ID_OB:
-          /* Much simpler than the ShaderPreview mess used for other ID types. */
-          object_preview_render(ip, cur_size);
-          continue;
+          if (object_preview_is_type_supported((Object *)ip->id)) {
+            /* Much simpler than the ShaderPreview mess used for other ID types. */
+            object_preview_render(ip, cur_size);
+            continue;
+          }
+          break;
         case ID_AC:
           action_preview_render(ip, cur_size);
           continue;
@@ -1749,6 +1757,17 @@ static void icon_preview_free(void *customdata)
   MEM_freeN(ip);
 }
 
+/**
+ * Check if \a id is supported by the automatic preview render.
+ */
+bool ED_preview_id_is_supported(const ID *id)
+{
+  if (GS(id->name) == ID_OB) {
+    return object_preview_is_type_supported((const Object *)id);
+  }
+  return BKE_previewimg_id_get_p(id) != NULL;
+}
+
 void ED_preview_icon_render(
     const bContext *C, Scene *scene, ID *id, uint *rect, int sizex, int sizey)
 {