From 2bddff8106ae876a48d74306d1596900ffa0e7da Mon Sep 17 00:00:00 2001
From: cristy <urban-warrior@git.imagemagick.org>
Date: Mon, 25 Jul 2011 18:39:12 +0000
Subject: [PATCH]

---
 MagickCore/fx.c       | 2 +-
 MagickCore/pixel.h    | 4 +++-
 MagickCore/property.c | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/MagickCore/fx.c b/MagickCore/fx.c
index 7a371324a..9812d2b99 100644
--- a/MagickCore/fx.c
+++ b/MagickCore/fx.c
@@ -1512,7 +1512,7 @@ static MagickRealType FxGetSymbol(FxInfo *fx_info,const PixelChannel channel,
           alpha=(MagickRealType) (QuantumScale*pixel.alpha);
           return(alpha);
         }
-        case DefaultPixelChannels:
+        case IntensityPixelChannel:
         {
           return(QuantumScale*GetPixelInfoIntensity(&pixel));
         }
diff --git a/MagickCore/pixel.h b/MagickCore/pixel.h
index 66751f870..185eda2d6 100644
--- a/MagickCore/pixel.h
+++ b/MagickCore/pixel.h
@@ -56,7 +56,9 @@ typedef enum
   AlphaPixelChannel = 3,
   BlackPixelChannel = 4,
   IndexPixelChannel = 4,
-  MaskPixelChannel = 5
+  MaskPixelChannel = 5,
+  IntensityPixelChannel = MaxPixelChannels,
+  SyncPixelChannel = MaxPixelChannels+1
 } PixelChannel;
 
 typedef enum
diff --git a/MagickCore/property.c b/MagickCore/property.c
index 1c5e26bac..afe15293b 100644
--- a/MagickCore/property.c
+++ b/MagickCore/property.c
@@ -2014,7 +2014,7 @@ MagickExport const char *GetImageProperty(const Image *image,
       if (LocaleNCompare("fx:",property,3) == 0)
         {
           fx_info=AcquireFxInfo(image,property+3);
-          status=FxEvaluateChannelExpression(fx_info,DefaultPixelChannels,0,0,
+          status=FxEvaluateChannelExpression(fx_info,IntensityPixelChannel,0,0,
             &alpha,exception);
           fx_info=DestroyFxInfo(fx_info);
           if (status != MagickFalse)
-- 
2.40.0