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+/* xscreensaver, Copyright (c) 1992, 1997 Jamie Zawinski <jwz@jwz.org>
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation. No representations are made about the suitability of this
+ * software for any purpose. It is provided "as is" without express or
+ * implied warranty.
+ */
+
+#ifndef __HSV_H__
+#define __HSV_H__
+
+/* Converts between RGB and HSV color spaces.
+ R, G, and B are in the range 0 - 65535;
+ H is in the range 0 - 360;
+ S and V are in the range 0.0 - 1.0.
+ */
+extern void hsv_to_rgb (int h, double s, double v,
+ unsigned short *r,
+ unsigned short *g,
+ unsigned short *b);
+extern void rgb_to_hsv (unsigned short r, unsigned short g, unsigned short b,
+ int *h, double *s, double *v);
+
+#endif /* __HSV_H__ */