From 1efa581fd554f39a32b9122aa193be86c1515b79 Mon Sep 17 00:00:00 2001
From: Cristy <urban-warrior@imagemagick.org>
Date: Fri, 3 Mar 2017 14:44:12 -0500
Subject: [PATCH] ...

---
 MagickCore/enhance.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/MagickCore/enhance.c b/MagickCore/enhance.c
index 529c4643b..1a0280d99 100644
--- a/MagickCore/enhance.c
+++ b/MagickCore/enhance.c
@@ -2948,6 +2948,10 @@ static inline void ModulateHCL(const double percent_hue,
   */
   ConvertRGBToHCL(*red,*green,*blue,&hue,&chroma,&luma);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue > 1.0)
+    hue-=1.0;
   chroma*=0.01*percent_chroma;
   luma*=0.01*percent_luma;
   ConvertHCLToRGB(hue,chroma,luma,red,green,blue);
@@ -2967,6 +2971,10 @@ static inline void ModulateHCLp(const double percent_hue,
   */
   ConvertRGBToHCLp(*red,*green,*blue,&hue,&chroma,&luma);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue > 1.0)
+    hue-=1.0;
   chroma*=0.01*percent_chroma;
   luma*=0.01*percent_luma;
   ConvertHCLpToRGB(hue,chroma,luma,red,green,blue);
@@ -2986,6 +2994,10 @@ static inline void ModulateHSB(const double percent_hue,
   */
   ConvertRGBToHSB(*red,*green,*blue,&hue,&saturation,&brightness);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue > 1.0)
+    hue-=1.0;
   saturation*=0.01*percent_saturation;
   brightness*=0.01*percent_brightness;
   ConvertHSBToRGB(hue,saturation,brightness,red,green,blue);
@@ -3005,6 +3017,10 @@ static inline void ModulateHSI(const double percent_hue,
   */
   ConvertRGBToHSI(*red,*green,*blue,&hue,&saturation,&intensity);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue > 1.0)
+    hue-=1.0;
   saturation*=0.01*percent_saturation;
   intensity*=0.01*percent_intensity;
   ConvertHSIToRGB(hue,saturation,intensity,red,green,blue);
@@ -3024,6 +3040,10 @@ static inline void ModulateHSL(const double percent_hue,
   */
   ConvertRGBToHSL(*red,*green,*blue,&hue,&saturation,&lightness);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue >= 1.0)
+    hue-=1.0;
   saturation*=0.01*percent_saturation;
   lightness*=0.01*percent_lightness;
   ConvertHSLToRGB(hue,saturation,lightness,red,green,blue);
@@ -3043,6 +3063,10 @@ static inline void ModulateHSV(const double percent_hue,
   */
   ConvertRGBToHSV(*red,*green,*blue,&hue,&saturation,&value);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue >= 1.0)
+    hue-=1.0;
   saturation*=0.01*percent_saturation;
   value*=0.01*percent_value;
   ConvertHSVToRGB(hue,saturation,value,red,green,blue);
@@ -3062,6 +3086,10 @@ static inline void ModulateHWB(const double percent_hue,
   */
   ConvertRGBToHWB(*red,*green,*blue,&hue,&whiteness,&blackness);
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue >= 1.0)
+    hue-=1.0;
   blackness*=0.01*percent_blackness;
   whiteness*=0.01*percent_whiteness;
   ConvertHWBToRGB(hue,whiteness,blackness,red,green,blue);
@@ -3083,6 +3111,10 @@ static inline void ModulateLCHab(const double percent_luma,
   luma*=0.01*percent_luma;
   chroma*=0.01*percent_chroma;
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue >= 1.0)
+    hue-=1.0;
   ConvertLCHabToRGB(luma,chroma,hue,red,green,blue);
 }
 
@@ -3102,6 +3134,10 @@ static inline void ModulateLCHuv(const double percent_luma,
   luma*=0.01*percent_luma;
   chroma*=0.01*percent_chroma;
   hue+=0.5*(0.01*percent_hue-1.0);
+  while (hue < 0.0)
+    hue+=1.0;
+  while (hue >= 1.0)
+    hue-=1.0;
   ConvertLCHuvToRGB(luma,chroma,hue,red,green,blue);
 }
 
-- 
2.40.0