36 |
|
static LUTAB mat_tab = LU_SINIT(free,free); /* material lookup table */ |
37 |
|
static LUTAB vtx_tab = LU_SINIT(free,free); /* vertex lookup table */ |
38 |
|
|
39 |
< |
/* CIE 1931 Standard Observer */ |
40 |
< |
static C_COLOR cie_xf = C_CIEX; |
41 |
< |
static C_COLOR cie_yf = C_CIEY; |
42 |
< |
static C_COLOR cie_zf = C_CIEZ; |
39 |
> |
/* CIE 1931 Standard Observer curves */ |
40 |
> |
static C_COLOR cie_xf = { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
41 |
> |
{14,42,143,435,1344,2839,3483,3362,2908,1954,956, |
42 |
> |
320,49,93,633,1655,2904,4334,5945,7621,9163,10263, |
43 |
> |
10622,10026,8544,6424,4479,2835,1649,874,468,227, |
44 |
> |
114,58,29,14,7,3,2,1,0}, 106836L, .467, .368, 362.230 |
45 |
> |
}; |
46 |
> |
static C_COLOR cie_yf = { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
47 |
> |
{0,1,4,12,40,116,230,380,600,910,1390,2080,3230, |
48 |
> |
5030,7100,8620,9540,9950,9950,9520,8700,7570,6310, |
49 |
> |
5030,3810,2650,1750,1070,610,320,170,82,41,21,10, |
50 |
> |
5,2,1,1,0,0}, 106856L, .398, .542, 493.525 |
51 |
> |
}; |
52 |
> |
static C_COLOR cie_zf = { 1, C_CDSPEC|C_CSSPEC|C_CSXY|C_CSEFF, |
53 |
> |
{65,201,679,2074,6456,13856,17471,17721,16692, |
54 |
> |
12876,8130,4652,2720,1582,782,422,203,87,39,21,17, |
55 |
> |
11,8,3,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0}, |
56 |
> |
106770L, .147, .077, 54.363 |
57 |
> |
}; |
58 |
> |
/* Derived CIE 1931 Primaries (imaginary) */ |
59 |
> |
static C_COLOR cie_xp = { 1, C_CDSPEC|C_CSSPEC|C_CSXY, |
60 |
> |
{-174,-198,-195,-197,-202,-213,-235,-272,-333, |
61 |
> |
-444,-688,-1232,-2393,-4497,-6876,-6758,-5256, |
62 |
> |
-3100,-815,1320,3200,4782,5998,6861,7408,7754, |
63 |
> |
7980,8120,8199,8240,8271,8292,8309,8283,8469, |
64 |
> |
8336,8336,8336,8336,8336,8336}, |
65 |
> |
127424L, 1., .0, |
66 |
> |
}; |
67 |
> |
static C_COLOR cie_yp = { 1, C_CDSPEC|C_CSSPEC|C_CSXY, |
68 |
> |
{-451,-431,-431,-430,-427,-417,-399,-366,-312, |
69 |
> |
-204,57,691,2142,4990,8810,9871,9122,7321,5145, |
70 |
> |
3023,1123,-473,-1704,-2572,-3127,-3474,-3704, |
71 |
> |
-3846,-3927,-3968,-3999,-4021,-4038,-4012,-4201, |
72 |
> |
-4066,-4066,-4066,-4066,-4066,-4066}, |
73 |
> |
-23035L, .0, 1., |
74 |
> |
}; |
75 |
> |
static C_COLOR cie_zp = { 1, C_CDSPEC|C_CSSPEC|C_CSXY, |
76 |
> |
{4051,4054,4052,4053,4054,4056,4059,4064,4071, |
77 |
> |
4074,4056,3967,3677,2933,1492,313,-440,-795, |
78 |
> |
-904,-918,-898,-884,-869,-863,-855,-855,-851, |
79 |
> |
-848,-847,-846,-846,-846,-845,-846,-843,-845, |
80 |
> |
-845,-845,-845,-845,-845}, |
81 |
> |
36057L, .0, .0, |
82 |
> |
}; |
83 |
|
|
84 |
|
static int setspectrum(); |
85 |
|
static int setbbtemp(); |
512 |
|
clr->cy = y / z; |
513 |
|
clr->flags |= C_CSXY; |
514 |
|
} else if (fl & C_CSSPEC) { /* cxy -> cspec */ |
515 |
< |
z = (cie_xf.ssum + cie_yf.ssum + cie_zf.ssum) / 3.; |
516 |
< |
x = clr->cx * z / cie_xf.ssum; |
517 |
< |
y = clr->cy * z / cie_yf.ssum; |
478 |
< |
z = (1. - clr->cx - clr->cy) * z / cie_zf.ssum; |
515 |
> |
x = clr->cx; |
516 |
> |
y = clr->cy; |
517 |
> |
z = 1. - x - y; |
518 |
|
clr->ssum = 0; |
519 |
< |
for (i = 0; i < C_CNSS; i++) |
520 |
< |
clr->ssum += clr->ssamp[i] = |
521 |
< |
x * cie_xf.ssamp[i] + |
522 |
< |
y * cie_yf.ssamp[i] + |
523 |
< |
z * cie_zf.ssamp[i] + .5; |
519 |
> |
for (i = 0; i < C_CNSS; i++) { |
520 |
> |
clr->ssamp[i] = x*cie_xp.ssamp[i] + y*cie_yp.ssamp[i] |
521 |
> |
+ z*cie_zp.ssamp[i] + .5; |
522 |
> |
if (clr->ssamp[i] < 0) /* out of gamut! */ |
523 |
> |
clr->ssamp[i] = 0; |
524 |
> |
else |
525 |
> |
clr->ssum += clr->ssamp[i]; |
526 |
> |
} |
527 |
|
clr->flags |= C_CSSPEC; |
528 |
|
} |
529 |
|
if (fl & C_CSEFF) { /* compute efficacy */ |
530 |
< |
if (clr->flags & C_CDSPEC) { /* from spectrum */ |
530 |
> |
if (clr->flags & C_CSSPEC) { /* from spectrum */ |
531 |
|
y = 0.; |
532 |
|
for (i = 0; i < C_CNSS; i++) |
533 |
|
y += cie_yf.ssamp[i] * clr->ssamp[i]; |
534 |
|
clr->eff = C_CLPWM * y / clr->ssum; |
535 |
< |
} else /* clr->flags & C_CDXY */ { /* from (x,y) */ |
535 |
> |
} else /* clr->flags & C_CSXY */ { /* from (x,y) */ |
536 |
|
clr->eff = clr->cx*cie_xf.eff + clr->cy*cie_yf.eff + |
537 |
|
(1. - clr->cx - clr->cy)*cie_zf.eff; |
538 |
|
} |