kscreensaver/xsavers/xs_hsv.h

   1 /* xscreensaver, Copyright (c) 1992, 1997 Jamie Zawinski <jwz@jwz.org>
   2  *
   3  * Permission to use, copy, modify, distribute, and sell this software and its
   4  * documentation for any purpose is hereby granted without fee, provided that
   5  * the above copyright notice appear in all copies and that both that
   6  * copyright notice and this permission notice appear in supporting
   7  * documentation.  No representations are made about the suitability of this
   8  * software for any purpose.  It is provided "as is" without express or
   9  * implied warranty.
  10  */
  11
  12 #ifndef __HSV_H__
  13 #define __HSV_H__
  14
  15 /* Converts between RGB and HSV color spaces.
  16    R, G, and B are in the range 0 - 65535;
  17    H is in the range 0 - 360;
  18    S and V are in the range 0.0 - 1.0.
  19  */
  20 extern void hsv_to_rgb (int h, double s, double v,
  21                         unsigned short *r,
  22                         unsigned short *g,
  23                         unsigned short *b);
  24 extern void rgb_to_hsv (unsigned short r, unsigned short g, unsigned short b,
  25                         int *h, double *s, double *v);
  26
  27 #endif /* __HSV_H__ */