From: cristy <urban-warrior@git.imagemagick.org>
Date: Tue, 11 May 2010 14:29:17 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~9488
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=5f54f2b7cb10469f7d3bb6150c504859ee379feb;p=imagemagick

---

diff --git a/magick/quantum-private.h b/magick/quantum-private.h
index 008cd5972..ec8cae2be 100644
--- a/magick/quantum-private.h
+++ b/magick/quantum-private.h
@@ -562,6 +562,10 @@ static inline unsigned long ScaleQuantumToMap(const Quantum quantum)
 
 static inline unsigned short ScaleQuantumToShort(const Quantum quantum)
 {
+  if (quantum <= 0.0)
+    return(0);
+  if ((quantum/65537.0) >= 65535.0)
+    return(65535);
   return((unsigned short) (quantum/281479271743489.0+0.5));
 }