From 9fe8cd76fbf1dc52cef01a2b137ca1b659b244c8 Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Tue, 19 Oct 2010 01:24:07 +0000
Subject: [PATCH]

---
 ChangeLog          |  1 +
 magick/option.c    |  2 ++
 magick/statistic.c | 21 +++++++++++----------
 magick/statistic.h |  3 ++-
 4 files changed, 16 insertions(+), 11 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 8c7441278..2a84c8e83 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,7 @@
   * Ignore PS bounding box offsets if -page is set.
   * Use #pragma omp master for dumping single threaded debugging information
     (single caused a fault).
+  * Add support for -evaluate exp.
 
 2010-10-12  6.6.5-0 Anthony Thyssen <A.Thyssen@griffith...>
   * Added "filter:sigma" expert setting defining the 'sigma' for the Gaussian
diff --git a/magick/option.c b/magick/option.c
index 709ae548d..1e01e5974 100644
--- a/magick/option.c
+++ b/magick/option.c
@@ -903,6 +903,8 @@ static const OptionInfo
     { "Cos", (ssize_t) CosineEvaluateOperator, MagickFalse },
     { "Cosine", (ssize_t) CosineEvaluateOperator, MagickFalse },
     { "Divide", (ssize_t) DivideEvaluateOperator, MagickFalse },
+    { "Exp", (ssize_t) ExponentialEvaluateOperator, MagickFalse },
+    { "Exponential", (ssize_t) ExponentialEvaluateOperator, MagickFalse },
     { "GaussianNoise", (ssize_t) GaussianNoiseEvaluateOperator, MagickFalse },
     { "ImpulseNoise", (ssize_t) ImpulseNoiseEvaluateOperator, MagickFalse },
     { "LaplacianNoise", (ssize_t) LaplacianNoiseEvaluateOperator, MagickFalse },
diff --git a/magick/statistic.c b/magick/statistic.c
index d44fd0909..db53e3dee 100644
--- a/magick/statistic.c
+++ b/magick/statistic.c
@@ -224,8 +224,7 @@ static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info,
     }
     case AndEvaluateOperator:
     {
-      result=(MagickRealType) ((size_t) pixel & (size_t)
-        (value+0.5));
+      result=(MagickRealType) ((size_t) pixel & (size_t) (value+0.5));
       break;
     }
     case CosineEvaluateOperator:
@@ -239,6 +238,12 @@ static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info,
       result=pixel/(value == 0.0 ? 1.0 : value);
       break;
     }
+    case ExponentialEvaluateOperator:
+    {
+      result=(MagickRealType) (QuantumRange*exp((double) (value*QuantumScale*
+        pixel)));
+      break;
+    }
     case GaussianNoiseEvaluateOperator:
     {
       result=(MagickRealType) GenerateDifferentialNoise(random_info,pixel,
@@ -259,8 +264,7 @@ static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info,
     }
     case LeftShiftEvaluateOperator:
     {
-      result=(MagickRealType) ((size_t) pixel << (size_t)
-        (value+0.5));
+      result=(MagickRealType) ((size_t) pixel << (size_t) (value+0.5));
       break;
     }
     case LogEvaluateOperator:
@@ -297,8 +301,7 @@ static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info,
     }
     case OrEvaluateOperator:
     {
-      result=(MagickRealType) ((size_t) pixel | (size_t)
-        (value+0.5));
+      result=(MagickRealType) ((size_t) pixel | (size_t) (value+0.5));
       break;
     }
     case PoissonNoiseEvaluateOperator:
@@ -315,8 +318,7 @@ static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info,
     }
     case RightShiftEvaluateOperator:
     {
-      result=(MagickRealType) ((size_t) pixel >> (size_t)
-        (value+0.5));
+      result=(MagickRealType) ((size_t) pixel >> (size_t) (value+0.5));
       break;
     }
     case SetEvaluateOperator:
@@ -360,8 +362,7 @@ static MagickRealType ApplyEvaluateOperator(RandomInfo *random_info,
     }
     case XorEvaluateOperator:
     {
-      result=(MagickRealType) ((size_t) pixel ^ (size_t)
-        (value+0.5));
+      result=(MagickRealType) ((size_t) pixel ^ (size_t) (value+0.5));
       break;
     }
   }
diff --git a/magick/statistic.h b/magick/statistic.h
index b600d7d7a..e16807440 100644
--- a/magick/statistic.h
+++ b/magick/statistic.h
@@ -71,7 +71,8 @@ typedef enum
   SineEvaluateOperator,
   AddModulusEvaluateOperator,
   MeanEvaluateOperator,
-  AbsEvaluateOperator
+  AbsEvaluateOperator,
+  ExponentialEvaluateOperator
 } MagickEvaluateOperator;
 
 typedef enum
-- 
2.50.1