From 87cd4acd6b133b5664f6c0bf3bfc7acca7f2ff75 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Sun, 29 Jan 2017 08:41:53 -0500
Subject: [PATCH] ...

---
 MagickCore/channel.c | 40 ++++++++++++++++++++--------------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/MagickCore/channel.c b/MagickCore/channel.c
index 066073616..56816ca5f 100644
--- a/MagickCore/channel.c
+++ b/MagickCore/channel.c
@@ -331,24 +331,23 @@ MagickExport Image *ChannelFxImage(const Image *image,const char *expression,
     switch (channel_op)
     {
       case AssignChannelOp:
-      {
-        destination_channel=(PixelChannel) i;
-        pixel=StringToDoubleInterval(token,(double) QuantumRange+1.0);
-        GetNextToken(p,&p,MagickPathExtent,token);
-        break;
-      }
       case ExchangeChannelOp:
       case TransferChannelOp:
       {
-        i=ParsePixelChannelOption(token);
-        if (i < 0)
+        destination_channel=(PixelChannel) i;
+        if (channel_op == AssignChannelOp)
+          pixel=StringToDoubleInterval(token,(double) QuantumRange+1.0);
+        else
           {
-            (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
-              "UnrecognizedChannelType","`%s'",token);
-            destination_image=DestroyImageList(destination_image);
-            return(destination_image);
+            i=ParsePixelChannelOption(token);
+            if (i < 0)
+              {
+                (void) ThrowMagickException(exception,GetMagickModule(),
+                  OptionError,"UnrecognizedChannelType","`%s'",token);
+                destination_image=DestroyImageList(destination_image);
+                return(destination_image);
+              }
           }
-        destination_channel=(PixelChannel) i;
         switch (destination_channel)
         {
           case RedPixelChannel:
@@ -375,8 +374,9 @@ MagickExport Image *ChannelFxImage(const Image *image,const char *expression,
           case MetaPixelChannel:
           default:
           {
-            (void) SetPixelMetaChannels(destination_image,(size_t) (i-
-              GetPixelChannels(destination_image)+1),exception);
+            (void) SetPixelMetaChannels(destination_image,(size_t) (
+              destination_channel-GetPixelChannels(destination_image)+1),
+              exception);
             break;
           }
         }
@@ -512,7 +512,7 @@ MagickExport Image *CombineImages(const Image *image,
   {
     case UndefinedColorspace:
     case sRGBColorspace:
-    { 
+    {
       if (GetImageListLength(image) > 3)
         combine_image->alpha_trait=BlendPixelTrait;
       break;
@@ -524,7 +524,7 @@ MagickExport Image *CombineImages(const Image *image,
       break;
     }
     case CMYKColorspace:
-    { 
+    {
       if (GetImageListLength(image) > 4)
         combine_image->alpha_trait=BlendPixelTrait;
       break;
@@ -1006,10 +1006,10 @@ MagickExport MagickBooleanType SetImageAlphaChannel(Image *image,
         {
           double
             gamma;
-  
+
           register ssize_t
             i;
-  
+
           if (GetPixelWriteMask(image,q) == 0)
             {
               q+=GetPixelChannels(image);
@@ -1137,7 +1137,7 @@ MagickExport MagickBooleanType SetImageAlphaChannel(Image *image,
         for (x=0; x < (ssize_t) image->columns; x++)
         {
           double
-            gamma, 
+            gamma,
             Sa;
 
           register ssize_t
-- 
2.40.0