ftp://ftp.sunet.se/pub/vendor/sco/skunkware/osr5/x11/savers/xscreensaver/xscreensaver...

[xscreensaver] / utils / hsv.c

diff --git a/utils/hsv.c b/utils/hsv.c
deleted file mode 100644 (file)
index c510912..0000000
--- a/utils/hsv.c
+++ /dev/null
@@ -1,120 +0,0 @@
-/* xscreensaver, Copyright (c) 1992 Jamie Zawinski <jwz@netscape.com>
- *
- * 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.
- */
-
-/* This file contains some utility routines for randomly picking the colors
-   to hack the screen with.
- */
-
-#include <X11/Xlib.h>
-
-void
-#if __STDC__
-hsv_to_rgb (int h, double s, double v,
-           unsigned short *r, unsigned short *g, unsigned short *b)
-#else
-hsv_to_rgb (h,s,v, r,g,b)
-     int h;                    /* 0 - 360   */
-     double s, v;              /* 0.0 - 1.0 */
-     unsigned short *r, *g, *b;        /* 0 - 65535 */
-#endif
-{
-  double H, S, V, R, G, B;
-  double p1, p2, p3;
-  double f;
-  int i;
-  S = s; V = v;
-  H = (h % 360) / 60.0;
-  i = H;
-  f = H - i;
-  p1 = V * (1 - S);
-  p2 = V * (1 - (S * f));
-  p3 = V * (1 - (S * (1 - f)));
-  if     (i == 0) { R = V;  G = p3; B = p1; }
-  else if (i == 1) { R = p2; G = V;  B = p1; }
-  else if (i == 2) { R = p1; G = V;  B = p3; }
-  else if (i == 3) { R = p1; G = p2; B = V;  }
-  else if (i == 4) { R = p3; G = p1; B = V;  }
-  else            { R = V;  G = p1; B = p2; }
-  *r = R * 65535;
-  *g = G * 65535;
-  *b = B * 65535;
-}
-
-void
-#if __STDC__
-rgb_to_hsv (unsigned short r, unsigned short g, unsigned short b,
-           int *h, double *s, double *v)
-#else
-rgb_to_hsv (r,g,b, h,s,v)
-     unsigned short r, g, b;   /* 0 - 65535 */
-     int *h;                   /* 0 - 360   */
-     double *s, *v;            /* 0.0 - 1.0 */
-#endif
-{
-  double R, G, B, H, S, V;
-  double cmax, cmin;
-  double cmm;
-  int imax;
-  R = ((double) r) / 65535.0;
-  G = ((double) g) / 65535.0;
-  B = ((double) b) / 65535.0;
-  cmax = R; cmin = G; imax = 1;
-  if  ( cmax < G ) { cmax = G; cmin = R; imax = 2; }
-  if  ( cmax < B ) { cmax = B; imax = 3; }
-  if  ( cmin > B ) { cmin = B; }
-  cmm = cmax - cmin;
-  V = cmax;
-  if (cmm == 0)
-    S = H = 0;
-  else
-    {
-      S = cmm / cmax;
-      if      (imax == 1) H =       (G - B) / cmm;
-      else if (imax == 2) H = 2.0 + (B - R) / cmm;
-      else if (imax == 3) H = 4.0 + (R - G) / cmm;
-      if (H < 0) H += 6.0;
-    }
-  *h = (H * 60.0);
-  *s = S;
-  *v = V;
-}
-
-
-void
-make_color_ramp (h1, s1, v1, h2, s2, v2,
-                pixels, npixels)
-     int h1, h2;                       /* 0 - 360   */
-     double s1, s2, v1, v2;            /* 0.0 - 1.0 */
-     XColor *pixels;
-     int npixels;
-{
-  int dh = (h2 - h1) / npixels;
-  double ds = (s2 - s1) / npixels;
-  double dv = (v2 - v1) / npixels;
-  int i;
-  for (i = 0; i < npixels; i++)
-    hsv_to_rgb ((h1 += dh), (s1 += ds), (v1 += dv),
-               &pixels [i].red, &pixels [i].green, &pixels [i].blue);
-}
-
-
-void
-cycle_hue (color, degrees)
-     XColor *color;
-     int degrees;
-{
-  int h;
-  double s, v;
-  rgb_to_hsv (color->red, color->green, color->blue,
-             &h, &s, &v);
-  h = (h + degrees) % 360;
-  hsv_to_rgb (h, s, v, &color->red, &color->green, &color->blue);
-}