From: Cristy <urban-warrior@imagemagick.org>
Date: Mon, 10 Aug 2015 10:29:20 +0000 (-0400)
Subject: Spread random offset is centered about 0
X-Git-Tag: 7.0.1-0~709
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=b4e15f23b82894aeb967f315e7655eacc859521e;p=imagemagick

Spread random offset is centered about 0
---

diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index 8ce4a6272..0db62ab07 100644
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -3504,9 +3504,9 @@ MagickExport Image *SpreadImage(const Image *image,const double radius,
       for ( ; ; )
       {
         x_offset=(ssize_t) floor((double) x+width*
-          GetPseudoRandomValue(random_info));
+          (GetPseudoRandomValue(random_info)-0.5));
         y_offset=(ssize_t) floor((double) y+width*
-          GetPseudoRandomValue(random_info));
+          (GetPseudoRandomValue(random_info)-0.5));
         if ((x_offset >= 0) && (x_offset < image->columns) &&
             (y_offset >= 0) && (y_offset < image->rows))
           break;