From 92ee628c066132b9e3a54040cf064ca861953cab Mon Sep 17 00:00:00 2001
From: Brendan Zabarauskas <bjzaba@yahoo.com.au>
Date: Thu, 11 Jul 2013 13:05:29 +1000
Subject: [PATCH] Fix normalize_degrees impls

---
 src/color/channel.rs | 36 ++++++++++++++++++++++++++++++------
 1 file changed, 30 insertions(+), 6 deletions(-)

diff --git a/src/color/channel.rs b/src/color/channel.rs
index dc6c969..8db4b17 100644
--- a/src/color/channel.rs
+++ b/src/color/channel.rs
@@ -77,15 +77,39 @@ pub trait FloatChannel: Float + Channel {
 }
 
 impl FloatChannel for f32 {
-    #[inline] pub fn normalize_channel(&self) -> f32 { self.clamp(&0.0, &1.0) }
-    #[inline] pub fn normalize_degrees(&self) -> f32 { (*self) % 360.0 }
-    #[inline] pub fn invert_degrees(&self) -> f32 { ((*self) + 180.0).normalize_degrees() }
+    #[inline] pub fn normalize_channel(&self) -> f32 {
+        self.clamp(&0.0, &1.0)
+    }
+
+    #[inline] pub fn normalize_degrees(&self) -> f32 {
+        if (*self) < 0.0 {
+            (*self + 360.0) % 360.0
+        } else {
+            *self % 360.0
+        }
+    }
+
+    #[inline] pub fn invert_degrees(&self) -> f32 {
+        (*self + 180.0).normalize_degrees()
+    }
 }
 
 impl FloatChannel for f64 {
-    #[inline] pub fn normalize_channel(&self) -> f64 { self.clamp(&0.0, &1.0) }
-    #[inline] pub fn normalize_degrees(&self) -> f64 { (*self) % 360.0 }
-    #[inline] pub fn invert_degrees(&self) -> f64 { ((*self) + 180.0).normalize_degrees() }
+    #[inline] pub fn normalize_channel(&self) -> f64 {
+        self.clamp(&0.0, &1.0)
+    }
+
+    #[inline] pub fn normalize_degrees(&self) -> f64 {
+        if (*self) < 0.0 {
+            (*self + 360.0) % 360.0
+        } else {
+            *self % 360.0
+        }
+    }
+
+    #[inline] pub fn invert_degrees(&self) -> f64 {
+        (*self + 180.0).normalize_degrees()
+    }
 }
 
 #[cfg(test)]