1 files changed, 13 insertions, 0 deletions
diff --git a/generic/tkZinc.c b/generic/tkZinc.c
index d6e5215..5c577e7 100644
--- a/generic/tkZinc.c
+++ b/generic/tkZinc.c
@@ -1533,6 +1533,12 @@ ZincObjCmd(ClientData           client_data,    /* Main window associated with
   wi->damaged_area_w = wi->damaged_area_h = 0;
   
   /*
+   * Viewport item management init
+   */
+  wi->nb_of_viewport_items = 0;
+  
+  
+  /*
    * Text management init.
    */
   wi->text_info.sel_color = NULL;
@@ -8805,6 +8811,13 @@ Repair(ZnWInfo  *wi)
 
     //printf("Repair, scissors: %d\n", ISCLEAR(wi->flags, ZN_CONFIGURE_EVENT));
     ce = ZnGLMakeCurrent(wi->dpy, wi);
+    
+    // PRE-RENDERING Method. Called for non directAccess viewports and other special effects
+    // ONLY IF WE HAVE AT LEAST ONE VIEWPORT
+    if (wi->nb_of_viewport_items > 0) {
+      wi->top_group->class->PreRender(wi->top_group);    
+    }
+    
     glDrawBuffer(GL_BACK);
 
 #if defined(GL) && defined(ROTATION)