From: cristy <urban-warrior@git.imagemagick.org>
Date: Sun, 22 Feb 2015 17:44:45 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: 7.0.1-0~1247
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=26323143e202e9d0c23a394934bc48067a5ddf41;p=imagemagick

---

diff --git a/MagickCore/resample.c b/MagickCore/resample.c
index 99aac326f..c938d277d 100644
--- a/MagickCore/resample.c
+++ b/MagickCore/resample.c
@@ -666,7 +666,8 @@ MagickExport MagickBooleanType ResamplePixelColor(
     Finialize results of resampling
   */
   divisor_m = 1.0/divisor_m;
-  pixel->alpha = (double) ClampToQuantum(divisor_m*pixel->alpha);
+  if (pixel->alpha_trait != UndefinedPixelTrait)
+    pixel->alpha = (double) ClampToQuantum(divisor_m*pixel->alpha);
   divisor_c = 1.0/divisor_c;
   pixel->red   = (double) ClampToQuantum(divisor_c*pixel->red);
   pixel->green = (double) ClampToQuantum(divisor_c*pixel->green);