| 1 |
+ |
/* Copyright (c) 1990 Regents of the University of California */ |
| 2 |
+ |
|
| 3 |
|
#ifndef lint |
| 4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
| 5 |
|
#endif |
| 39 |
|
} |
| 40 |
|
}; |
| 41 |
|
|
| 42 |
+ |
#ifdef NTSC |
| 43 |
+ |
static float xyz2rgbmat[3][3] = { /* XYZ to RGB (NTSC */ |
| 44 |
+ |
1.73, -.48, -.26, |
| 45 |
+ |
-.81, 1.65, -.02, |
| 46 |
+ |
.08, -.17, 1.28, |
| 47 |
+ |
}; |
| 48 |
+ |
#else |
| 49 |
+ |
static float xyz2rgbmat[3][3] = { /* XYZ to RGB (color monitor) */ |
| 50 |
+ |
2.739, -1.145, -.424, |
| 51 |
+ |
-1.119, 2.029, .033, |
| 52 |
+ |
.138, -.333, 1.105, |
| 53 |
+ |
}; |
| 54 |
+ |
#endif |
| 55 |
|
|
| 56 |
+ |
|
| 57 |
+ |
|
| 58 |
|
spec_rgb(col, s, e) /* compute RGB color from spectral range */ |
| 59 |
|
COLOR col; |
| 60 |
|
int s, e; |
| 77 |
|
s = 0; |
| 78 |
|
|
| 79 |
|
e -= STARTWL; |
| 80 |
+ |
if (e <= s) { |
| 81 |
+ |
col[RED] = col[GRN] = col[BLU] = 0.0; |
| 82 |
+ |
return; |
| 83 |
+ |
} |
| 84 |
|
if (e >= INCWL*(NINC - 1)) |
| 85 |
|
e = INCWL*(NINC - 1) - 1; |
| 86 |
|
|
| 103 |
|
cie_rgb(rgbcolor, ciecolor) /* convert CIE to RGB (NTSC) */ |
| 104 |
|
register COLOR rgbcolor, ciecolor; |
| 105 |
|
{ |
| 85 |
– |
static float cmat[3][3] = { |
| 86 |
– |
1.73, -.48, -.26, |
| 87 |
– |
-.81, 1.65, -.02, |
| 88 |
– |
.08, -.17, 1.28, |
| 89 |
– |
}; |
| 106 |
|
register int i; |
| 107 |
|
|
| 108 |
|
for (i = 0; i < 3; i++) { |
| 109 |
< |
rgbcolor[i] = cmat[i][0]*ciecolor[0] + |
| 110 |
< |
cmat[i][1]*ciecolor[1] + |
| 111 |
< |
cmat[i][2]*ciecolor[2] ; |
| 109 |
> |
rgbcolor[i] = xyz2rgbmat[i][0]*ciecolor[0] + |
| 110 |
> |
xyz2rgbmat[i][1]*ciecolor[1] + |
| 111 |
> |
xyz2rgbmat[i][2]*ciecolor[2] ; |
| 112 |
|
if (rgbcolor[i] < 0.0) |
| 113 |
|
rgbcolor[i] = 0.0; |
| 114 |
|
} |
