Fix LineAA in case of 4 channel

Fix bug when enter 4 channel image to LineAA function.

diff --git a/modules/imgproc/src/drawing.cpp b/modules/imgproc/src/drawing.cpp
index c2db764..5c4c7e7 100644 (file)
--- 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();