Added negateChannel to Magick++.

Magick++/lib/Image.cpp

@@ -1618,17 +1618,16 @@ void Magick::Image::magnify ( void )
 }
 
 // Remap image colors with closest color from reference image
-void Magick::Image::map ( const Image &mapImage_ , const bool dither_ )
+void Magick::Image::map ( const Image &mapImage_, const bool dither_ )
 {
   modifyImage();
   options()->quantizeDither( dither_ );
-  RemapImage ( options()->quantizeInfo(), image(),
-             mapImage_.constImage());
+  RemapImage ( options()->quantizeInfo(), image(), mapImage_.constImage());
   throwImageException();
 }
 
 // Floodfill designated area with replacement opacity value
-void Magick::Image::matteFloodfill ( const Color &target_ ,
+void Magick::Image::matteFloodfill ( const Color &target_,
                                      const unsigned int opacity_,
                                      const ssize_t x_, const ssize_t y_,
                                      const Magick::PaintMethod method_ )
@@ -1716,13 +1715,21 @@ void Magick::Image::motionBlur ( const double radius_,
   throwException( exceptionInfo );
   (void) DestroyExceptionInfo( &exceptionInfo );
 }
-    
+
 // Negate image.  Set grayscale_ to true to effect grayscale values
 // only
 void Magick::Image::negate ( const bool grayscale_ )
 {
   modifyImage();
-  NegateImage ( image(), grayscale_ == true ? MagickTrue : MagickFalse );
+  NegateImage( image(), (MagickBooleanType) grayscale_);
+  throwImageException();
+}
+
+void Magick::Image::negateChannel ( const ChannelType channel_,
+                                    const bool grayscale_)
+{
+  modifyImage();
+  NegateImageChannel( image(), channel_, (MagickBooleanType) grayscale_);
   throwImageException();
 }
 

Magick++/lib/Magick++/Image.h

@@ -547,11 +547,11 @@ namespace Magick
     void            magnify ( void );
     
     // Remap image colors with closest color from reference image
-    void            map ( const Image &mapImage_ ,
+    void            map ( const Image &mapImage_,
                           const bool dither_ = false );
 
     // Floodfill designated area with replacement opacity value
-    void            matteFloodfill ( const Color &target_ ,
+    void            matteFloodfill ( const Color &target_,
                                      const unsigned int opacity_,
                                      const ::ssize_t x_, const ::ssize_t y_,
                                      const PaintMethod method_ );
@@ -565,8 +565,8 @@ namespace Magick
 
     // Modulate percent hue, saturation, and brightness of an image
     void            modulate ( const double brightness_,
-                              const double saturation_,
-                              const double hue_ );
+                               const double saturation_,
+                               const double hue_ );
 
     // Motion blur image with specified blur factor
     // The radius_ parameter specifies the radius of the Gaussian, in
@@ -581,6 +581,8 @@ namespace Magick
     // Negate colors in image.  Set grayscale to only negate grayscale
     // values in image.
     void            negate ( const bool grayscale_ = false );
+    void            negateChannel ( const ChannelType channel_,
+                                    const bool grayscale_ = false );
 
     // Normalize image (increase contrast by normalizing the pixel
     // values to span the full range of color values)