From: cristy <urban-warrior@git.imagemagick.org>
Date: Sat, 6 Jun 2015 23:22:46 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~937
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7beda643d8713ff62ffc17b57e4b1f0d3fc9c523;p=imagemagick

---

diff --git a/MagickCore/composite-private.h b/MagickCore/composite-private.h
index 0d233e5d4..d963a7f7c 100644
--- a/MagickCore/composite-private.h
+++ b/MagickCore/composite-private.h
@@ -41,7 +41,7 @@ static inline double MagickOver_(const double p,const double alpha,
 
   Sa=QuantumScale*alpha;
   Da=QuantumScale*beta;
-  return(Sa*p-Sa*Da*q+Da*q);
+  return(Sa*p+Da*q*(1.0-Sa));
 }
 
 static inline double RoundToUnity(const double value)