1 files changed, 4 insertions, 0 deletions
diff --git a/color.h b/color.h
index 6ce5168..6fec82d 100644
--- a/color.h
+++ b/color.h
@@ -15,6 +15,7 @@
 #include "kd-forest.h"
 #include <stdint.h>
 
+// Unpack a color into 8-bit RGB values
 void color_unpack(uint8_t pixel[3], uint32_t color);
 
 // Use RGB coordinates
@@ -24,4 +25,7 @@ void color_set_Lab(double coords[3], uint32_t color);
 // Use CIE L*u*v* coordinates
 void color_set_Luv(double coords[3], uint32_t color);
 
+// For sorting by hue
+int color_comparator(const void *a, const void *b);
+
 #endif // COLOR_H