From be0a67bd6508ccff81570a41ebe8169e34012c66 Mon Sep 17 00:00:00 2001
From: Matthieu Bouron <matthieu.bouron@gmail.com>
Date: Fri, 4 Jan 2013 22:08:11 +0100
Subject: lavfi/drawutils: fix blending computation in blend_line function

If width is not alligned with hsub, background component should only be
multiplied once by sub alpha component.
---
 libavfilter/drawutils.c | 1 -
 1 file changed, 1 deletion(-)

(limited to 'libavfilter/drawutils.c')

diff --git a/libavfilter/drawutils.c b/libavfilter/drawutils.c
index aefd09d1ea..aebc000f4c 100644
--- a/libavfilter/drawutils.c
+++ b/libavfilter/drawutils.c
@@ -313,7 +313,6 @@ static void blend_line(uint8_t *dst, unsigned src, unsigned alpha,
     unsigned tau = 0x1010101 - alpha;
     int x;
 
-    src *= alpha;
     if (left) {
         unsigned suba = (left * alpha) >> hsub;
         *dst = (*dst * (0x1010101 - suba) + src * suba) >> 24;
-- 
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