From: dirk <dirk@git.imagemagick.org>
Date: Sat, 10 Aug 2013 09:19:30 +0000 (+0000)
Subject: Added posterizeChannel to Magick++.
X-Git-Tag: 7.0.1-0~3404
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=136e4f4cade2bbc8ac5f5a359e6f94e057c5b3b2;p=imagemagick

Added posterizeChannel to Magick++.
---

diff --git a/Magick++/lib/Image.cpp b/Magick++/lib/Image.cpp
index 14b9704cc..d9ec6ed93 100644
--- a/Magick++/lib/Image.cpp
+++ b/Magick++/lib/Image.cpp
@@ -2020,6 +2020,20 @@ void Magick::Image::posterize ( const size_t levels_,
   (void) DestroyExceptionInfo( &exceptionInfo );
 }
 
+void Magick::Image::posterizeChannel ( const ChannelType channel_,
+                                       const size_t levels_,
+                                       const DitherMethod method_ )
+{
+  modifyImage();
+  ExceptionInfo exceptionInfo;
+  GetExceptionInfo( &exceptionInfo );
+  ChannelType channel_mask = SetImageChannelMask( image(), channel_ );
+  PosterizeImage( image(), levels_, method_, &exceptionInfo );
+  SetPixelChannelMask( image(), channel_mask );
+  throwException( exceptionInfo );
+  (void) DestroyExceptionInfo( &exceptionInfo );
+}
+
 // Execute a named process module using an argc/argv syntax similar to
 // that accepted by a C 'main' routine. An exception is thrown if the
 // requested process module doesn't exist, fails to load, or fails during
diff --git a/Magick++/lib/Magick++/Image.h b/Magick++/lib/Magick++/Image.h
index 27306da3f..d755f53ea 100644
--- a/Magick++/lib/Magick++/Image.h
+++ b/Magick++/lib/Magick++/Image.h
@@ -634,6 +634,9 @@ namespace Magick
     // Reduces the image to a limited number of colors for a "poster" effect.
     void            posterize ( const size_t levels_,
                                 const DitherMethod method_ );
+    void            posterizeChannel ( const ChannelType channel_,
+                                       const size_t levels_,
+                                       const DitherMethod method_ );
 
     // Execute a named process module using an argc/argv syntax similar to
     // that accepted by a C 'main' routine. An exception is thrown if the