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Diffstat (limited to 'uisimulator/hsv.c')
-rw-r--r-- | uisimulator/hsv.c | 81 |
1 files changed, 0 insertions, 81 deletions
diff --git a/uisimulator/hsv.c b/uisimulator/hsv.c deleted file mode 100644 index cf1cc8d18e..0000000000 --- a/uisimulator/hsv.c +++ /dev/null | |||
@@ -1,81 +0,0 @@ | |||
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 | /* This file contains some utility routines for randomly picking the colors | ||
13 | to hack the screen with. | ||
14 | */ | ||
15 | |||
16 | #include "utils.h" | ||
17 | #include "hsv.h" | ||
18 | |||
19 | void | ||
20 | hsv_to_rgb (int h, double s, double v, | ||
21 | unsigned short *r, unsigned short *g, unsigned short *b) | ||
22 | { | ||
23 | double H, S, V, R, G, B; | ||
24 | double p1, p2, p3; | ||
25 | double f; | ||
26 | int i; | ||
27 | |||
28 | if (s < 0) s = 0; | ||
29 | if (v < 0) v = 0; | ||
30 | if (s > 1) s = 1; | ||
31 | if (v > 1) v = 1; | ||
32 | |||
33 | S = s; V = v; | ||
34 | H = (h % 360) / 60.0; | ||
35 | i = H; | ||
36 | f = H - i; | ||
37 | p1 = V * (1 - S); | ||
38 | p2 = V * (1 - (S * f)); | ||
39 | p3 = V * (1 - (S * (1 - f))); | ||
40 | if (i == 0) { R = V; G = p3; B = p1; } | ||
41 | else if (i == 1) { R = p2; G = V; B = p1; } | ||
42 | else if (i == 2) { R = p1; G = V; B = p3; } | ||
43 | else if (i == 3) { R = p1; G = p2; B = V; } | ||
44 | else if (i == 4) { R = p3; G = p1; B = V; } | ||
45 | else { R = V; G = p1; B = p2; } | ||
46 | *r = R * 65535; | ||
47 | *g = G * 65535; | ||
48 | *b = B * 65535; | ||
49 | } | ||
50 | |||
51 | void | ||
52 | rgb_to_hsv (unsigned short r, unsigned short g, unsigned short b, | ||
53 | int *h, double *s, double *v) | ||
54 | { | ||
55 | double R, G, B, H, S, V; | ||
56 | double cmax, cmin; | ||
57 | double cmm; | ||
58 | int imax; | ||
59 | R = ((double) r) / 65535.0; | ||
60 | G = ((double) g) / 65535.0; | ||
61 | B = ((double) b) / 65535.0; | ||
62 | cmax = R; cmin = G; imax = 1; | ||
63 | if ( cmax < G ) { cmax = G; cmin = R; imax = 2; } | ||
64 | if ( cmax < B ) { cmax = B; imax = 3; } | ||
65 | if ( cmin > B ) { cmin = B; } | ||
66 | cmm = cmax - cmin; | ||
67 | V = cmax; | ||
68 | if (cmm == 0) | ||
69 | S = H = 0; | ||
70 | else | ||
71 | { | ||
72 | S = cmm / cmax; | ||
73 | if (imax == 1) H = (G - B) / cmm; | ||
74 | else if (imax == 2) H = 2.0 + (B - R) / cmm; | ||
75 | else /*if (imax == 3)*/ H = 4.0 + (R - G) / cmm; | ||
76 | if (H < 0) H += 6.0; | ||
77 | } | ||
78 | *h = (H * 60.0); | ||
79 | *s = S; | ||
80 | *v = V; | ||
81 | } | ||