From cd13b30fdef45314e21e4d0e5cef6739915e53f7 Mon Sep 17 00:00:00 2001
From: Tsukasa Sugiura <t.sugiura0204@gmail.com>
Date: Sat, 12 Sep 2015 01:42:25 +0900
Subject: [PATCH] Fix LineAA in case of 4 channel

Fix bug when enter 4 channel image to LineAA function.
---
 modules/imgproc/src/drawing.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/imgproc/src/drawing.cpp b/modules/imgproc/src/drawing.cpp
index c2db764820..5c4c7e792a 100644
--- a/modules/imgproc/src/drawing.cpp
+++ b/modules/imgproc/src/drawing.cpp
@@ -610,12 +610,12 @@ LineAA( Mat& img, Point pt1, Point pt2, const void* color )
                 ICV_PUT_POINT();
                 ICV_PUT_POINT();
 
-                tptr += step;
+                tptr += 4;
                 a = (ep_corr * FilterTable[dist] >> 8) & 0xff;
                 ICV_PUT_POINT();
                 ICV_PUT_POINT();
 
-                tptr += step;
+                tptr += 4;
                 a = (ep_corr * FilterTable[63 - dist] >> 8) & 0xff;
                 ICV_PUT_POINT();
                 ICV_PUT_POINT();