From: Cristy <urban-warrior@imagemagick.org>
Date: Tue, 20 Oct 2015 10:36:12 +0000 (-0400)
Subject: Corrected gradient:extent formula for diagonal, ellipse, and minimum
X-Git-Tag: 7.0.1-0~539
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2526e880b74424d234db67a26e7d466bc920c068;p=imagemagick

Corrected gradient:extent formula for diagonal, ellipse, and minimum
---

diff --git a/MagickCore/paint.c b/MagickCore/paint.c
index 2d592d138..1bc408e73 100644
--- a/MagickCore/paint.c
+++ b/MagickCore/paint.c
@@ -560,8 +560,8 @@ MagickExport MagickBooleanType GradientImage(Image *image,
     {
       if (LocaleCompare(artifact,"Diagonal") == 0)
         {
-          gradient->radii.x=sqrt(gradient->radii.x*gradient->radii.x+
-            gradient->radii.y*gradient->radii.y);
+          gradient->radii.x=(double) (sqrt(image->columns*image->columns+
+            image->rows*image->rows))/2.0;
           gradient->radii.y=gradient->radii.x;
         }
       if (LocaleCompare(artifact,"Ellipse") == 0)
@@ -571,7 +571,8 @@ MagickExport MagickBooleanType GradientImage(Image *image,
         }
       if (LocaleCompare(artifact,"Mininum") == 0)
         {
-          gradient->radii.x=MagickMin(gradient->radii.x,gradient->radii.y);
+          gradient->radii.x=(double) (MagickMin(image->columns,image->rows))/
+            2.0;
           gradient->radii.y=gradient->radii.x;
         }
     }