evas vg: prevent a corner-case crash.

tbh, current vg interfaces a little bit bad... here is one scenario to this
stupid case.

efl_parent_set() and evas_object_vg_root_node_set() both do re-parent
 job. They could be conflicted if user calls both apis in either way.

efl_parent_set(root_node, NULL); but Vg Object still keeps the root node
which is just a dangling pointer that occurs a crash while rendering.

1 files changed, 5 insertions, 0 deletions

diff --git a/src/lib/evas/canvas/evas_vg_private.h b/src/lib/evas/canvas/evas_vg_private.h
index 4ff8b2bb45..cc43fb03ab 100644
--- a/src/lib/evas/canvas/evas_vg_private.h
+++ b/src/lib/evas/canvas/evas_vg_private.h
@@ -62,6 +62,8 @@ struct _Efl_Canvas_Vg_Node_Data
    Efl_Canvas_Vg_Node *mask;
    Ector_Renderer *renderer;
 
+   Efl_VG *vg_obj;
+
    void (*render_pre)(Eo *obj, Eina_Matrix3 *parent, Ector_Surface *s, void *data, Efl_Canvas_Vg_Node_Data *nd);
    void *data;
 
@@ -71,6 +73,7 @@ struct _Efl_Canvas_Vg_Node_Data
 
    Eina_Bool visibility : 1;
    Eina_Bool changed : 1;
+   Eina_Bool parenting : 1;
 };
 
 struct _Efl_Canvas_Vg_Container_Data
@@ -108,6 +111,8 @@ Vg_File_Data *              evas_cache_vg_file_info(const char *file, const char
 
 Eina_Bool                   evas_vg_save_to_file(Vg_File_Data *evg_data, const char *file, const char *key, const char *flags);
 
+void                        efl_canvas_vg_node_root_set(Efl_VG *node, Efl_VG *vg_obj);
+
 static inline Efl_Canvas_Vg_Node_Data *
 _evas_vg_render_pre(Efl_VG *child, Ector_Surface *s, Eina_Matrix3 *m)
 {