diff --git a/src/lib/evas/common/evas_map_image_aa.c b/src/lib/evas/common/evas_map_image_aa.c
index 444755c333..3a99c1e6c5 100644
--- a/src/lib/evas/common/evas_map_image_aa.c
+++ b/src/lib/evas/common/evas_map_image_aa.c
@@ -73,6 +73,10 @@ _aa_coverage_apply(Line *line, int ww, int w, DATA32 val, Eina_Bool src_alpha)
    return val;
 }
 
+/*
+ *	To understand here AA main logic,
+ *	Please refer this page: hermet.pe.kr/122?catgory=662934
+*/
 static void
 _calc_aa_edges_internal(Line *spans, int eidx, int ystart, int yend)
 {