12 |
|
|
13 |
|
#include <stdio.h> |
14 |
|
#include <string.h> |
15 |
+ |
#include <math.h> |
16 |
|
#include "color.h" |
17 |
|
|
18 |
|
#define CEPS 1e-4 /* color epsilon */ |
19 |
|
|
20 |
< |
#define CEQ(v1,v2) ((v1) <= (v2)+CEPS && (v2) <= (v1)+CEPS) |
20 |
> |
#define CEQ(v1,v2) (((v1) <= (v2)+CEPS) & ((v2) <= (v1)+CEPS)) |
21 |
|
|
22 |
< |
#define XYEQ(c1,c2) (CEQ((c1)[CIEX],(c2)[CIEX]) && CEQ((c1)[CIEY],(c2)[CIEY])) |
22 |
> |
#define XYEQ(c1,c2) (CEQ((c1)[CIEX],(c2)[CIEX]) & CEQ((c1)[CIEY],(c2)[CIEY])) |
23 |
|
|
24 |
|
|
25 |
|
RGBPRIMS stdprims = STDPRIMS; /* standard primary chromaticities */ |
26 |
+ |
RGBPRIMS xyzprims = {1,0, 0,1, 0,0, 1.f/3.f,1.f/3.f}; |
27 |
|
|
28 |
< |
COLOR cblack = BLKCOLOR; /* global black color */ |
29 |
< |
COLOR cwhite = WHTCOLOR; /* global white color */ |
28 |
> |
const COLOR cblack = BLKCOLOR; /* global black color */ |
29 |
> |
const COLOR cwhite = WHTCOLOR; /* global white color */ |
30 |
> |
const SCOLOR scblack = {0}; /* global black spectrum */ |
31 |
|
|
32 |
|
float xyneu[2] = {1./3., 1./3.}; /* neutral xy chromaticities */ |
33 |
|
|
34 |
|
/* |
35 |
< |
* The following table contains the CIE tristimulus integrals |
36 |
< |
* for X, Y, and Z. The table is cumulative, so that |
37 |
< |
* each color coordinate integrates to 1. |
35 |
> |
* The tables below encode the CIE 1931 2° standard observer |
36 |
> |
* functions for X, Y, and Z. These tables are cumulative, as are |
37 |
> |
* ones that follow. |
38 |
|
*/ |
39 |
|
|
40 |
< |
#define STARTWL 380 /* starting wavelength (nanometers) */ |
41 |
< |
#define INCWL 10 /* wavelength increment */ |
39 |
< |
#define NINC 40 /* # of values */ |
40 |
> |
#define CIE_X_WLMIN 362 |
41 |
> |
#define CIE_X_WLMAX 774 |
42 |
|
|
43 |
< |
static BYTE chroma[3][NINC] = { |
44 |
< |
{ /* X */ |
45 |
< |
0, 0, 0, 2, 6, 13, 22, 30, 36, 41, |
46 |
< |
42, 43, 43, 44, 46, 52, 60, 71, 87, 106, |
47 |
< |
128, 153, 178, 200, 219, 233, 243, 249, 252, 254, |
48 |
< |
255, 255, 255, 255, 255, 255, 255, 255, 255, 255 |
49 |
< |
}, { /* Y */ |
50 |
< |
0, 0, 0, 0, 0, 1, 2, 4, 7, 11, |
51 |
< |
17, 24, 34, 48, 64, 84, 105, 127, 148, 169, |
52 |
< |
188, 205, 220, 232, 240, 246, 250, 253, 254, 255, |
53 |
< |
255, 255, 255, 255, 255, 255, 255, 255, 255, 255 |
54 |
< |
}, { /* Z */ |
55 |
< |
0, 0, 2, 10, 32, 66, 118, 153, 191, 220, |
56 |
< |
237, 246, 251, 253, 254, 255, 255, 255, 255, 255, |
57 |
< |
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, |
58 |
< |
255, 255, 255, 255, 255, 255, 255, 255, 255, 255 |
59 |
< |
} |
43 |
> |
static const unsigned short cie_x_cumul[CIE_X_WLMAX-CIE_X_WLMIN+1] = { |
44 |
> |
0,1,1,1,1,1,1,2,2,2,3,3,3,4,5,5,6,7,8,9,10,11,12,14,16,18,20,23,26,29, |
45 |
> |
33,37,41,47,53,60,68,77,86,97,108,121,135,151,170,190,214,241,271,304, |
46 |
> |
342,385,432,486,545,612,686,768,860,961,1073,1195,1326,1467,1618, |
47 |
> |
1776,1943,2117,2298,2485,2677,2875,3076,3281,3489,3700,3912,4125,4340,4555, |
48 |
> |
4769,4983,5197,5409,5620,5830,6038,6244,6448,6651,6851,7049,7245,7437, |
49 |
> |
7627,7813,7995,8173,8347,8517,8682,8842,8996,9143,9284,9418,9545,9665, |
50 |
> |
9778,9884,9984,10077,10164,10245,10321,10390,10454,10513,10566,10615, |
51 |
> |
10659,10698,10734,10766,10794,10819,10842,10861,10879,10893,10906,10917, |
52 |
> |
10926,10933,10939,10944,10948,10951,10953,10955,10957,10958,10960,10961, |
53 |
> |
10964,10967,10971,10977,10984,10994,11006,11020,11038,11060,11085,11114, |
54 |
> |
11148,11187,11231,11280,11335,11396,11464,11537,11618,11705,11799,11901, |
55 |
> |
12010,12126,12249,12380,12518,12664,12818,12980,13150,13328,13515,13709, |
56 |
> |
13913,14124,14345,14574,14813,15060,15317,15582,15858,16142,16437,16741, |
57 |
> |
17055,17379,17713,18057,18412,18776,19151,19536,19931,20337,20753,21180, |
58 |
> |
21616,22063,22520,22988,23465,23953,24450,24957,25474,26000,26535,27080, |
59 |
> |
27633,28195,28765,29343,29929,30522,31122,31729,32342,32961,33585,34215, |
60 |
> |
34849,35487,36129,36775,37423,38073,38724,39375,40027,40679,41329,41978, |
61 |
> |
42625,43270,43911,44548,45181,45808,46429,47044,47652,48253,48845,49430, |
62 |
> |
50005,50571,51128,51674,52209,52733,53245,53745,54232,54706,55167,55614, |
63 |
> |
56048,56468,56876,57269,57651,58019,58376,58720,59052,59373,59681,59979, |
64 |
> |
60265,60539,60803,61056,61298,61529,61750,61962,62163,62355,62538,62712, |
65 |
> |
62877,63034,63183,63325,63459,63586,63706,63820,63927,64028,64123,64213, |
66 |
> |
64297,64376,64451,64520,64586,64647,64704,64758,64808,64855,64899,64941, |
67 |
> |
64980,65016,65051,65083,65114,65143,65169,65194,65218,65240,65260,65278, |
68 |
> |
65296,65312,65327,65341,65354,65366,65377,65387,65397,65406,65415,65423, |
69 |
> |
65430,65437,65444,65450,65455,65461,65466,65470,65475,65479,65483,65486, |
70 |
> |
65489,65493,65495,65498,65501,65503,65505,65507,65509,65511,65513,65514, |
71 |
> |
65516,65517,65518,65519,65520,65521,65522,65523,65524,65525,65526,65526, |
72 |
> |
65527,65527,65528,65528,65529,65529,65530,65530,65530,65531,65531,65531, |
73 |
> |
65532,65532,65532,65532,65532,65533,65533,65533,65533,65533,65533,65533, |
74 |
> |
65533,65534,65534,65534,65534,65534,65534,65534,65534,65534,65534,65534, |
75 |
> |
65534,65534,65534,65534,65535 |
76 |
|
}; |
77 |
|
|
78 |
+ |
#define CIE_Y_WLMIN 386 |
79 |
+ |
#define CIE_Y_WLMAX 760 |
80 |
+ |
|
81 |
+ |
static const unsigned short cie_y_cumul[CIE_Y_WLMAX-CIE_Y_WLMIN+1] = { |
82 |
+ |
0,1,1,1,1,1,1,1,1,1,2,2,2,2,2,3,3,3,4,4,5,5,6,7,8,8,10,11,12,14, |
83 |
+ |
15,17,19,22,25,28,31,35,40,45,50,56,63,70,78,86,95,105,115,126, |
84 |
+ |
138,150,164,178,193,208,225,242,260,280,300,321,343,367,391, |
85 |
+ |
417,443,472,501,532,564,598,633,670,708,748,790,833,879,926, |
86 |
+ |
975,1027,1080,1136,1194,1255,1318,1384,1453,1525,1601,1679,1761, |
87 |
+ |
1846,1935,2027,2123,2223,2327,2435,2548,2665,2787,2915,3048,3187, |
88 |
+ |
3332,3484,3643,3808,3981,4162,4352,4550,4757,4975,5203,5442,5691, |
89 |
+ |
5952,6225,6509,6805,7114,7435,7769,8116,8476,8849,9235,9634,10045, |
90 |
+ |
10469,10904,11351,11808,12275,12752,13239,13734,14239,14752,15273, |
91 |
+ |
15801,16337,16880,17429,17984,18546,19112,19684,20260,20841,21426, |
92 |
+ |
22015,22608,23203,23802,24403,25007,25612,26220,26828,27439,28050, |
93 |
+ |
28662,29275,29888,30501,31114,31727,32340,32951,33561,34170,34777, |
94 |
+ |
35382,35985,36585,37182,37777,38368,38955,39539,40119,40695,41266, |
95 |
+ |
41832,42393,42950,43501,44046,44586,45119,45646,46167,46682,47189, |
96 |
+ |
47690,48183,48670,49149,49621,50085,50542,50991,51432,51866,52293, |
97 |
+ |
52711,53122,53524,53919,54306,54685,55057,55420,55775,56123,56463, |
98 |
+ |
56795,57119,57435,57743,58044,58337,58623,58901,59172,59435,59691, |
99 |
+ |
59939,60180,60414,60640,60859,61070,61274,61471,61661,61844,62019, |
100 |
+ |
62188,62351,62507,62657,62802,62940,63073,63201,63323,63441,63553, |
101 |
+ |
63660,63763,63861,63954,64043,64128,64208,64285,64358,64427,64493, |
102 |
+ |
64555,64614,64670,64723,64773,64820,64865,64907,64947,64984,65019, |
103 |
+ |
65052,65083,65113,65140,65166,65190,65212,65233,65253,65271,65288, |
104 |
+ |
65304,65319,65334,65347,65360,65371,65383,65393,65403,65412,65420, |
105 |
+ |
65428,65435,65442,65449,65454,65460,65465,65470,65474,65478,65482, |
106 |
+ |
65485,65488,65492,65494,65497,65500,65502,65504,65506,65508,65510, |
107 |
+ |
65512,65513,65515,65516,65517,65519,65520,65521,65522,65523,65523, |
108 |
+ |
65524,65525,65526,65526,65527,65527,65528,65528,65529,65529,65530, |
109 |
+ |
65530,65530,65531,65531,65531,65532,65532,65532,65532,65532,65533, |
110 |
+ |
65533,65533,65533,65533,65533,65533,65534,65534,65534,65534,65534, |
111 |
+ |
65534,65534,65534,65534,65534,65534,65534,65534,65534,65534,65534,65535 |
112 |
+ |
}; |
113 |
+ |
|
114 |
+ |
#define CIE_Z_WLMIN 359 |
115 |
+ |
#define CIE_Z_WLMAX 624 |
116 |
+ |
|
117 |
+ |
static const unsigned short cie_z_cumul[CIE_Z_WLMAX-CIE_Z_WLMIN+1] = { |
118 |
+ |
0,1,1,2,2,3,4,5,6,7,8,9,11,12,14,16,19,22,25,28,32,37,41,47,52,59,66,75,84, |
119 |
+ |
95,107,121,136,154,173,196,221,250,283,321,362,408,458,512,573,640,717,804, |
120 |
+ |
903,1015,1142,1285,1446,1627,1830,2058,2313,2598,2917,3272,3668,4108,4597, |
121 |
+ |
5135,5723,6360,7044,7773,8544,9356,10205,11090,12006,12952,13923,14918, |
122 |
+ |
15934,16967,18016,19076,20148,21227,22312,23401,24492,25585,26678,27771, |
123 |
+ |
28861,29950,31037,32121,33202,34281,35355,36424,37487,38542,39588,40624, |
124 |
+ |
41647,42657,43652,44631,45590,46527,47438,48321,49173,49993,50783,51542, |
125 |
+ |
52270,52968,53636,54275,54885,55465,56018,56543,57042,57514,57961,58384, |
126 |
+ |
58784,59162,59519,59856,60175,60477,60762,61032,61287,61529,61757,61974, |
127 |
+ |
62179,62374,62559,62734,62901,63059,63211,63355,63492,63622,63745,63862, |
128 |
+ |
63971,64075,64172,64263,64347,64427,64500,64569,64632,64692,64747,64798, |
129 |
+ |
64846,64891,64933,64973,65010,65045,65078,65109,65139,65166,65192,65216, |
130 |
+ |
65239,65260,65280,65298,65315,65331,65345,65359,65371,65383,65393,65403, |
131 |
+ |
65412,65420,65428,65435,65441,65447,65452,65457,65462,65466,65470,65473, |
132 |
+ |
65476,65479,65482,65485,65487,65489,65491,65493,65495,65497,65498,65500, |
133 |
+ |
65501,65503,65504,65505,65506,65508,65509,65510,65511,65512,65513,65514, |
134 |
+ |
65515,65516,65517,65518,65519,65520,65520,65521,65522,65523,65523,65524, |
135 |
+ |
65525,65525,65526,65527,65527,65528,65528,65529,65529,65530,65530,65531, |
136 |
+ |
65531,65531,65532,65532,65532,65532,65533,65533,65533,65533,65533,65533, |
137 |
+ |
65534,65534,65534,65534,65534,65534,65534,65534,65534,65535 |
138 |
+ |
}; |
139 |
+ |
|
140 |
+ |
#define SCOTOPIC_WLMIN 382 |
141 |
+ |
#define SCOTOPIC_WLMAX 684 |
142 |
+ |
|
143 |
+ |
static const unsigned short scotopic_cumul[SCOTOPIC_WLMAX-SCOTOPIC_WLMIN+1] = { |
144 |
+ |
0, 1, 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 15, 17, 20, 24, 28, 33, 38, 44, |
145 |
+ |
52, 60, 69, 80, 93, 107, 123, 142, 163, 186, 213, 242, 275, 312, 353, |
146 |
+ |
398, 448, 502, 562, 627, 698, 775, 859, 949, 1046, 1150, 1261, 1380, |
147 |
+ |
1507, 1642, 1785, 1936, 2096, 2265, 2442, 2628, 2823, 3027, 3239, 3461, |
148 |
+ |
3691, 3930, 4178, 4435, 4700, 4974, 5257, 5548, 5847, 6154, 6469, 6793, |
149 |
+ |
7123, 7462, 7809, 8162, 8524, 8892, 9268, 9651, 10041, 10438, 10843, 11254, |
150 |
+ |
11673, 12099, 12532, 12973, 13422, 13878, 14342, 14814, 15293, 15780, 16276, |
151 |
+ |
16779, 17290, 17809, 18336, 18872, 19415, 19967, 20526, 21093, 21667, 22249, |
152 |
+ |
22839, 23436, 24039, 24649, 25266, 25890, 26519, 27154, 27795, 28441, 29092, |
153 |
+ |
29747, 30405, 31068, 31734, 32402, 33074, 33747, 34420, 35095, 35771, 36446, |
154 |
+ |
37119, 37793, 38464, 39132, 39798, 40460, 41118, 41772, 42421, 43064, 43701, |
155 |
+ |
44332, 44957, 45575, 46185, 46787, 47381, 47967, 48543, 49110, 49668, 50215, |
156 |
+ |
50753, 51280, 51797, 52302, 52797, 53281, 53754, 54215, 54665, 55104, 55531, |
157 |
+ |
55947, 56352, 56744, 57125, 57495, 57853, 58200, 58536, 58860, 59174, 59477, |
158 |
+ |
59769, 60051, 60322, 60583, 60834, 61075, 61306, 61528, 61741, 61944, 62139, |
159 |
+ |
62326, 62504, 62674, 62836, 62991, 63138, 63278, 63412, 63538, 63659, 63773, |
160 |
+ |
63881, 63983, 64080, 64172, 64259, 64340, 64418, 64490, 64559, 64623, 64684, |
161 |
+ |
64742, 64795, 64846, 64893, 64937, 64978, 65017, 65053, 65087, 65119, 65149, |
162 |
+ |
65176, 65202, 65226, 65248, 65269, 65289, 65307, 65323, 65339, 65353, 65367, |
163 |
+ |
65379, 65391, 65402, 65412, 65421, 65430, 65438, 65445, 65452, 65458, 65464, |
164 |
+ |
65469, 65474, 65479, 65483, 65487, 65491, 65494, 65497, 65500, 65503, 65505, |
165 |
+ |
65507, 65509, 65511, 65513, 65514, 65516, 65517, 65519, 65520, 65521, 65522, |
166 |
+ |
65523, 65524, 65525, 65525, 65526, 65527, 65527, 65528, 65528, 65529, 65529, |
167 |
+ |
65529, 65530, 65530, 65530, 65531, 65531, 65531, 65531, 65532, 65532, 65532, |
168 |
+ |
65532, 65532, 65533, 65533, 65533, 65533, 65533, 65533, 65533, 65533, 65533, |
169 |
+ |
65533, 65534, 65534, 65534, 65534, 65534, 65534, 65534, 65534, 65535 |
170 |
+ |
}; |
171 |
+ |
|
172 |
+ |
#define MELANOPIC_WLMIN 380 |
173 |
+ |
#define MELANOPIC_WLMAX 651 |
174 |
+ |
|
175 |
+ |
static const unsigned short melanopic_cumul[MELANOPIC_WLMAX-MELANOPIC_WLMIN+1] = { |
176 |
+ |
0, 1, 2, 3, 4, 5, 7, 8, 10, 12, 14, 17, 20, 23, 27, 32, 37, 42, 49, 56, |
177 |
+ |
65, 75, 86, 99, 114, 131, 150, 173, 200, 230, 265, 303, 347, 395, 448, |
178 |
+ |
508, 574, 650, 734, 828, 931, 1041, 1158, 1283, 1415, 1554, 1703, 1862, |
179 |
+ |
2031, 2211, 2400, 2600, 2809, 3028, 3257, 3497, 3748, 4012, 4288, 4576, |
180 |
+ |
4876, 5187, 5509, 5842, 6185, 6540, 6905, 7283, 7673, 8075, 8489, 8915, |
181 |
+ |
9351, 9799, 10259, 10729, 11211, 11705, 12211, 12729, 13258, 13799, |
182 |
+ |
14351, 14915, 15491, 16078, 16676, 17286, 17908, 18541, 19184, 19837, |
183 |
+ |
20498, 21168, 21846, 22532, 23226, 23928, 24637, 25353, 26075, 26802, |
184 |
+ |
27532, 28267, 29005, 29746, 30488, 31233, 31979, 32726, 33473, 34220, |
185 |
+ |
34966, 35711, 36455, 37196, 37935, 38671, 39403, 40129, 40851, 41568, |
186 |
+ |
42279, 42983, 43680, 44369, 45050, 45724, 46388, 47043, 47688, 48322, |
187 |
+ |
48945, 49557, 50156, 50743, 51317, 51879, 52428, 52964, 53487, 53997, |
188 |
+ |
54493, 54976, 55445, 55901, 56343, 56771, 57186, 57587, 57976, 58351, |
189 |
+ |
58712, 59061, 59397, 59720, 60031, 60330, 60616, 60891, 61154, 61405, |
190 |
+ |
61646, 61875, 62094, 62303, 62501, 62690, 62870, 63040, 63201, 63354, |
191 |
+ |
63498, 63634, 63763, 63884, 63998, 64105, 64206, 64300, 64389, 64472, |
192 |
+ |
64549, 64622, 64689, 64753, 64811, 64866, 64917, 64964, 65008, 65049, |
193 |
+ |
65086, 65121, 65154, 65184, 65211, 65237, 65260, 65282, 65302, 65321, |
194 |
+ |
65338, 65354, 65368, 65381, 65394, 65405, 65415, 65425, 65434, 65442, |
195 |
+ |
65449, 65456, 65463, 65468, 65474, 65479, 65483, 65487, 65491, 65494, |
196 |
+ |
65498, 65501, 65503, 65506, 65508, 65510, 65512, 65514, 65515, 65517, |
197 |
+ |
65518, 65520, 65521, 65522, 65523, 65524, 65525, 65525, 65526, 65527, |
198 |
+ |
65527, 65528, 65528, 65529, 65529, 65530, 65530, 65530, 65531, 65531, |
199 |
+ |
65531, 65531, 65532, 65532, 65532, 65532, 65532, 65533, 65533, 65533, |
200 |
+ |
65533, 65533, 65533, 65533, 65533, 65533, 65534, 65534, 65534, 65535 |
201 |
+ |
}; |
202 |
+ |
|
203 |
|
COLORMAT xyz2rgbmat = { /* XYZ to RGB (no white balance) */ |
204 |
|
{(CIE_y_g - CIE_y_b - CIE_x_b*CIE_y_g + CIE_y_b*CIE_x_g)/CIE_C_rD, |
205 |
|
(CIE_x_b - CIE_x_g - CIE_x_b*CIE_y_g + CIE_x_g*CIE_y_b)/CIE_C_rD, |
234 |
|
|
235 |
|
|
236 |
|
void |
237 |
< |
spec_rgb(col, s, e) /* compute RGB color from spectral range */ |
238 |
< |
COLOR col; |
239 |
< |
int s, e; |
237 |
> |
spec_cie( /* compute XYZ color from a spectral range */ |
238 |
> |
COLOR col, /* returned color */ |
239 |
> |
int s, /* starting and ending wavelengths */ |
240 |
> |
int e |
241 |
> |
) |
242 |
|
{ |
243 |
+ |
if (s > e) { int i = s; s = e; e = i; } |
244 |
+ |
|
245 |
+ |
if ((s >= CIE_X_WLMAX) | (e <= CIE_X_WLMIN)) |
246 |
+ |
col[CIEX] = 0; |
247 |
+ |
else |
248 |
+ |
col[CIEX] = (cie_x_cumul[e>=CIE_X_WLMAX ? CIE_X_WLMAX-CIE_X_WLMIN : e-CIE_X_WLMIN] - |
249 |
+ |
cie_x_cumul[(s>CIE_X_WLMIN)*(s-CIE_X_WLMIN)])*(1./65535.); |
250 |
+ |
|
251 |
+ |
if ((s >= CIE_Y_WLMAX) | (e <= CIE_Y_WLMIN)) |
252 |
+ |
col[CIEY] = 0; |
253 |
+ |
else |
254 |
+ |
col[CIEY] = (cie_y_cumul[e>=CIE_Y_WLMAX ? CIE_Y_WLMAX-CIE_Y_WLMIN : e-CIE_Y_WLMIN] - |
255 |
+ |
cie_y_cumul[(s>CIE_Y_WLMIN)*(s-CIE_Y_WLMIN)])*(1./65535.); |
256 |
+ |
|
257 |
+ |
if ((s >= CIE_Z_WLMAX) | (e <= CIE_Z_WLMIN)) |
258 |
+ |
col[CIEZ] = 0; |
259 |
+ |
else |
260 |
+ |
col[CIEZ] = (cie_z_cumul[e>=CIE_Z_WLMAX ? CIE_Z_WLMAX-CIE_Z_WLMIN : e-CIE_Z_WLMIN] - |
261 |
+ |
cie_z_cumul[(s>CIE_Z_WLMIN)*(s-CIE_Z_WLMIN)])*(1./65535.); |
262 |
+ |
} |
263 |
+ |
|
264 |
+ |
|
265 |
+ |
void |
266 |
+ |
spec_rgb( /* compute RGB color from spectral range */ |
267 |
+ |
COLOR col, |
268 |
+ |
int s, |
269 |
+ |
int e |
270 |
+ |
) |
271 |
+ |
{ |
272 |
|
COLOR ciecolor; |
273 |
|
|
274 |
|
spec_cie(ciecolor, s, e); |
275 |
< |
cie_rgb(col, ciecolor); |
275 |
> |
colortrans(col, xyz2rgbmat, ciecolor); |
276 |
|
} |
277 |
|
|
278 |
|
|
279 |
+ |
static double |
280 |
+ |
spec_dot( /* spectrum dot-product with cumulative observer */ |
281 |
+ |
const SCOLOR scol, |
282 |
+ |
int ncs, |
283 |
+ |
const float wlpt[4], |
284 |
+ |
const unsigned short cumul[], |
285 |
+ |
int wlmin, |
286 |
+ |
int wlmax |
287 |
+ |
) |
288 |
+ |
{ |
289 |
+ |
const double wlstp = (wlpt[0] - wlpt[3])/(double)ncs; |
290 |
+ |
int wl1 = (int)wlpt[3]; |
291 |
+ |
int n = 0; |
292 |
+ |
double sum = 0; |
293 |
+ |
|
294 |
+ |
if (wl1 < wlmin) { |
295 |
+ |
n += (int)((wlmin - wl1)/wlstp); |
296 |
+ |
wl1 = wlmin; |
297 |
+ |
} else if (wl1 >= wlmax) |
298 |
+ |
return(.0); |
299 |
+ |
|
300 |
+ |
while (n < ncs) { |
301 |
+ |
int wl0 = wl1; |
302 |
+ |
wl1 = (int)(ncs==3 ? wlpt[2-n] : wlpt[3] + (n+1)*wlstp); |
303 |
+ |
if (wl1 >= wlmax) { |
304 |
+ |
sum += (65535 - cumul[wl0-wlmin]) * scol[ncs-1-n]; |
305 |
+ |
break; |
306 |
+ |
} |
307 |
+ |
sum += (cumul[wl1-wlmin] - cumul[wl0-wlmin]) * scol[ncs-1-n++]; |
308 |
+ |
} |
309 |
+ |
return(sum * (1./65535.)); |
310 |
+ |
} |
311 |
+ |
|
312 |
+ |
|
313 |
|
void |
314 |
< |
spec_cie(col, s, e) /* compute a color from a spectral range */ |
315 |
< |
COLOR col; /* returned color */ |
316 |
< |
int s, e; /* starting and ending wavelengths */ |
314 |
> |
scolor2cie( /* accurate conversion from spectrum to XYZ */ |
315 |
> |
COLOR col, |
316 |
> |
const SCOLOR scol, |
317 |
> |
int ncs, |
318 |
> |
const float wlpt[4] |
319 |
> |
) |
320 |
|
{ |
321 |
< |
register int i, d, r; |
322 |
< |
|
323 |
< |
s -= STARTWL; |
324 |
< |
if (s < 0) |
325 |
< |
s = 0; |
321 |
> |
if (ncs == 3) { /* not a spectrum! */ |
322 |
> |
rgb_cie(col, scol); |
323 |
> |
return; |
324 |
> |
} |
325 |
> |
col[CIEX] = spec_dot(scol, ncs, wlpt, cie_x_cumul, CIE_X_WLMIN, CIE_X_WLMAX); |
326 |
> |
col[CIEY] = spec_dot(scol, ncs, wlpt, cie_y_cumul, CIE_Y_WLMIN, CIE_Y_WLMAX); |
327 |
> |
col[CIEZ] = spec_dot(scol, ncs, wlpt, cie_z_cumul, CIE_Z_WLMIN, CIE_Z_WLMAX); |
328 |
> |
} |
329 |
|
|
330 |
< |
e -= STARTWL; |
331 |
< |
if (e <= s) { |
332 |
< |
col[CIEX] = col[CIEY] = col[CIEZ] = 0.0; |
330 |
> |
|
331 |
> |
void |
332 |
> |
scolor2rgb( /* accurate conversion from spectrum to RGB */ |
333 |
> |
COLOR col, |
334 |
> |
const SCOLOR scol, |
335 |
> |
int ncs, |
336 |
> |
const float wlpt[4] |
337 |
> |
) |
338 |
> |
{ |
339 |
> |
COLOR ciecolor; |
340 |
> |
|
341 |
> |
if (ncs == 3) { /* not really a spectrum, so we punt... */ |
342 |
> |
copycolor(col, scol); |
343 |
|
return; |
344 |
|
} |
345 |
< |
if (e >= INCWL*(NINC - 1)) |
346 |
< |
e = INCWL*(NINC - 1) - 1; |
345 |
> |
scolor2cie(ciecolor, scol, ncs, wlpt); |
346 |
> |
cie_rgb(col, ciecolor); |
347 |
> |
} |
348 |
|
|
124 |
– |
d = e / INCWL; /* interpolate values */ |
125 |
– |
r = e % INCWL; |
126 |
– |
for (i = 0; i < 3; i++) |
127 |
– |
col[i] = chroma[i][d]*(INCWL - r) + chroma[i][d + 1]*r; |
349 |
|
|
350 |
< |
d = s / INCWL; |
351 |
< |
r = s % INCWL; |
352 |
< |
for (i = 0; i < 3; i++) |
353 |
< |
col[i] -= chroma[i][d]*(INCWL - r) - chroma[i][d + 1]*r; |
350 |
> |
void |
351 |
> |
scolor_out( /* prepare (spectral) color for output */ |
352 |
> |
COLORV *cout, |
353 |
> |
RGBPRIMS pr, |
354 |
> |
const SCOLOR cres |
355 |
> |
) |
356 |
> |
{ |
357 |
> |
static COLORMAT xyz2myp; |
358 |
> |
static RGBPRIMP lastp = NULL; |
359 |
|
|
360 |
< |
col[CIEX] = (col[CIEX] + 0.5) * (1./(256*INCWL)); |
361 |
< |
col[CIEY] = (col[CIEY] + 0.5) * (1./(256*INCWL)); |
362 |
< |
col[CIEZ] = (col[CIEZ] + 0.5) * (1./(256*INCWL)); |
360 |
> |
if (!pr) { /* output is spectral */ |
361 |
> |
copyscolor(cout, cres); |
362 |
> |
} else if (pr == stdprims) { /* output is standard RGB */ |
363 |
> |
scolor_rgb(cout, cres); |
364 |
> |
} else if (pr == xyzprims) { /* output is XYZ */ |
365 |
> |
scolor_cie(cout, cres); |
366 |
> |
scalecolor(cout, WHTEFFICACY); |
367 |
> |
} else if (NCSAMP > 3) { /* spectral -> custom RGB */ |
368 |
> |
COLOR xyz; |
369 |
> |
if (lastp != pr) |
370 |
> |
compxyz2rgbWBmat(xyz2myp, lastp=pr); |
371 |
> |
scolor_cie(xyz, cres); |
372 |
> |
colortrans(cout, xyz2myp, xyz); |
373 |
> |
clipgamut(cout, xyz[CIEY], CGAMUT_LOWER, cblack, cwhite); |
374 |
> |
} else { /* else copy unknown RGB */ |
375 |
> |
copycolor(cout, cres); |
376 |
> |
} |
377 |
|
} |
378 |
|
|
379 |
|
|
380 |
+ |
double |
381 |
+ |
scolor2photopic( /* compute scotopic integral for spectral color */ |
382 |
+ |
const SCOLOR scol, |
383 |
+ |
int ncs, |
384 |
+ |
const float wlpt[4] |
385 |
+ |
) |
386 |
+ |
{ |
387 |
+ |
if (ncs == 3) |
388 |
+ |
return bright(scol); |
389 |
+ |
|
390 |
+ |
return(spec_dot(scol, ncs, wlpt, cie_y_cumul, CIE_Y_WLMIN, CIE_Y_WLMAX)); |
391 |
+ |
} |
392 |
+ |
|
393 |
+ |
|
394 |
+ |
double |
395 |
+ |
scolor2scotopic( /* compute Y channel for spectral color */ |
396 |
+ |
const SCOLOR scol, |
397 |
+ |
int ncs, |
398 |
+ |
const float wlpt[4] |
399 |
+ |
) |
400 |
+ |
{ |
401 |
+ |
return(spec_dot(scol, ncs, wlpt, scotopic_cumul, SCOTOPIC_WLMIN, SCOTOPIC_WLMAX)); |
402 |
+ |
} |
403 |
+ |
|
404 |
+ |
|
405 |
+ |
double |
406 |
+ |
scolor2melanopic( /* compute melanopic integral for spectral color */ |
407 |
+ |
const SCOLOR scol, |
408 |
+ |
int ncs, |
409 |
+ |
const float wlpt[4] |
410 |
+ |
) |
411 |
+ |
{ |
412 |
+ |
return(spec_dot(scol, ncs, wlpt, melanopic_cumul, MELANOPIC_WLMIN, MELANOPIC_WLMAX)); |
413 |
+ |
} |
414 |
+ |
|
415 |
+ |
|
416 |
+ |
double |
417 |
+ |
scolor_photopic( /* compute scotopic integral for spectral color */ |
418 |
+ |
const SCOLOR scol |
419 |
+ |
) |
420 |
+ |
{ |
421 |
+ |
return(scolor2photopic(scol, NCSAMP, WLPART)); |
422 |
+ |
} |
423 |
+ |
|
424 |
+ |
|
425 |
+ |
double |
426 |
+ |
scolor_scotopic( /* compute Y channel for spectral color */ |
427 |
+ |
const SCOLOR scol |
428 |
+ |
) |
429 |
+ |
{ |
430 |
+ |
return(scolor2scotopic(scol, NCSAMP, WLPART)); |
431 |
+ |
} |
432 |
+ |
|
433 |
+ |
|
434 |
+ |
double |
435 |
+ |
scolor_melanopic( /* compute melanopic integral for spectral color */ |
436 |
+ |
const SCOLOR scol |
437 |
+ |
) |
438 |
+ |
{ |
439 |
+ |
return(scolor2melanopic(scol, NCSAMP, WLPART)); |
440 |
+ |
} |
441 |
+ |
|
442 |
+ |
|
443 |
|
void |
444 |
< |
cie_rgb(rgb, xyz) /* convert CIE color to standard RGB */ |
445 |
< |
COLOR rgb; |
446 |
< |
COLOR xyz; |
444 |
> |
convertscolorcol( /* any uniform spectrum to working */ |
445 |
> |
SCOLOR rcol, |
446 |
> |
const COLORV src[], |
447 |
> |
int snc, |
448 |
> |
double swl0, |
449 |
> |
double swl1 |
450 |
> |
) |
451 |
|
{ |
452 |
+ |
if (NCSAMP > 3) { /* spectrum -> spectrum */ |
453 |
+ |
convertscolor(rcol, NCSAMP, WLPART[0], WLPART[3], |
454 |
+ |
src, snc, swl0, swl1); |
455 |
+ |
} else if ((snc <= MAXCSAMP) & (swl0 > swl1)) { |
456 |
+ |
float wlpt[4]; /* no intermediate conversion needed */ |
457 |
+ |
wlpt[0] = swl0; wlpt[3] = swl1; |
458 |
+ |
wlpt[1] = WLPART[1]; wlpt[2] = WLPART[2]; |
459 |
+ |
scolor2rgb(rcol, (COLORV *)src, snc, wlpt); |
460 |
+ |
} else { |
461 |
+ |
SCOLOR dcol; /* else convert spectrum first */ |
462 |
+ |
int dnc = snc*(WLPART[0] - WLPART[3])/fabs(swl0 - swl1) + .99; |
463 |
+ |
if (dnc > MAXCSAMP) dnc = MAXCSAMP; |
464 |
+ |
convertscolor(dcol, dnc, WLPART[0], WLPART[3], src, snc, swl0, swl1); |
465 |
+ |
scolor2rgb(rcol, dcol, dnc, WLPART); |
466 |
+ |
} |
467 |
+ |
} |
468 |
+ |
|
469 |
+ |
|
470 |
+ |
void |
471 |
+ |
cie_rgb( /* convert CIE color to standard RGB */ |
472 |
+ |
COLOR rgb, |
473 |
+ |
const COLOR xyz |
474 |
+ |
) |
475 |
+ |
{ |
476 |
|
colortrans(rgb, xyz2rgbmat, xyz); |
477 |
|
clipgamut(rgb, xyz[CIEY], CGAMUT_LOWER, cblack, cwhite); |
478 |
|
} |
479 |
|
|
480 |
|
|
481 |
|
int |
482 |
< |
clipgamut(col, brt, gamut, lower, upper) /* clip to gamut cube */ |
483 |
< |
COLOR col; |
484 |
< |
double brt; |
485 |
< |
int gamut; |
486 |
< |
COLOR lower, upper; |
482 |
> |
clipgamut( /* clip to gamut cube */ |
483 |
> |
COLOR col, |
484 |
> |
double brt, |
485 |
> |
int gamut, |
486 |
> |
const COLOR lower, |
487 |
> |
const COLOR upper |
488 |
> |
) |
489 |
|
{ |
490 |
|
int rflags = 0; |
491 |
|
double brtmin, brtmax, v, vv; |
492 |
|
COLOR cgry; |
493 |
< |
register int i; |
493 |
> |
int i; |
494 |
|
/* check for no check */ |
495 |
|
if (gamut == 0) return(0); |
496 |
|
/* check brightness limits */ |
527 |
|
|
528 |
|
|
529 |
|
void |
530 |
< |
colortrans(c2, mat, c1) /* convert c1 by mat and put into c2 */ |
531 |
< |
register COLOR c2; |
532 |
< |
register COLORMAT mat; |
533 |
< |
register COLOR c1; |
530 |
> |
colortrans( /* convert c1 by mat and put into c2 */ |
531 |
> |
COLOR c2, |
532 |
> |
const COLORMAT mat, |
533 |
> |
const COLOR c1 |
534 |
> |
) |
535 |
|
{ |
536 |
|
COLOR cout; |
537 |
|
|
544 |
|
|
545 |
|
|
546 |
|
void |
547 |
< |
multcolormat(m3, m2, m1) /* multiply m1 by m2 and put into m3 */ |
548 |
< |
COLORMAT m3; /* m3 can be either m1 or m2 w/o harm */ |
549 |
< |
COLORMAT m2, m1; |
547 |
> |
multcolormat( /* multiply m1 by m2 and put into m3 */ |
548 |
> |
COLORMAT m3, /* m3 can be either m1 or m2 w/o harm */ |
549 |
> |
const COLORMAT m2, |
550 |
> |
const COLORMAT m1 |
551 |
> |
) |
552 |
|
{ |
553 |
|
COLORMAT mt; |
554 |
< |
register int i, j; |
554 |
> |
int i, j; |
555 |
|
|
556 |
|
for (i = 0; i < 3; i++) |
557 |
|
for (j = 0; j < 3; j++) |
562 |
|
} |
563 |
|
|
564 |
|
|
565 |
< |
void |
566 |
< |
compxyz2rgbmat(mat, pr) /* compute conversion from CIE to RGB space */ |
567 |
< |
COLORMAT mat; |
568 |
< |
register RGBPRIMS pr; |
565 |
> |
int |
566 |
> |
colorprimsOK( /* are color primaries reasonable? */ |
567 |
> |
RGBPRIMS pr |
568 |
> |
) |
569 |
|
{ |
570 |
+ |
int i, j; |
571 |
+ |
/* check white point */ |
572 |
+ |
if ((pr[3][CIEX] <= CEPS) | (pr[3][CIEX] >= 1.-CEPS) | |
573 |
+ |
(pr[3][CIEY] <= CEPS) | (pr[3][CIEY] >= 1.-CEPS)) |
574 |
+ |
return(0); |
575 |
+ |
for (i = 3; i--; ) /* check for XYZ color primaries */ |
576 |
+ |
if (!CEQ(pr[i][CIEX],(i==0)) | !CEQ(pr[i][CIEY],(i==1))) |
577 |
+ |
break; |
578 |
+ |
if (i < 0) |
579 |
+ |
return(-1); /* flag as XYZ color space */ |
580 |
+ |
/* check color primaries */ |
581 |
+ |
for (i = 0; i < 3; i++) { |
582 |
+ |
if ((pr[i][CIEX] <= -2.) | (pr[i][CIEY] <= -2.)) |
583 |
+ |
return(0); |
584 |
+ |
if ((pr[i][CIEX] >= 3.) | (pr[i][CIEY] >= 3.)) |
585 |
+ |
return(0); |
586 |
+ |
if (pr[i][CIEX] + pr[i][CIEY] <= -2.) |
587 |
+ |
return(0); |
588 |
+ |
if (pr[i][CIEX] + pr[i][CIEY] >= 3.) |
589 |
+ |
return(0); |
590 |
+ |
} |
591 |
+ |
for (i = 0; i < 4; i++) /* make sure space is 3-dimensional */ |
592 |
+ |
for (j = i+1; j < 4; j++) |
593 |
+ |
if (CEQ(pr[i][CIEX],pr[j][CIEX]) & |
594 |
+ |
CEQ(pr[i][CIEY],pr[j][CIEY])) |
595 |
+ |
return(0); |
596 |
+ |
return(1); |
597 |
+ |
} |
598 |
+ |
|
599 |
+ |
|
600 |
+ |
|
601 |
+ |
int |
602 |
+ |
compxyz2rgbmat( /* compute conversion from CIE to RGB space */ |
603 |
+ |
COLORMAT mat, |
604 |
+ |
RGBPRIMS pr |
605 |
+ |
) |
606 |
+ |
{ |
607 |
|
double C_rD, C_gD, C_bD; |
608 |
|
|
609 |
|
if (pr == stdprims) { /* can use xyz2rgbmat */ |
610 |
|
cpcolormat(mat, xyz2rgbmat); |
611 |
< |
return; |
611 |
> |
return(1); |
612 |
|
} |
613 |
+ |
if (pr == xyzprims) { /* identity */ |
614 |
+ |
memset(mat, 0, sizeof(COLORMAT)); |
615 |
+ |
mat[0][0] = mat[1][1] = mat[2][2] = 1.f; |
616 |
+ |
return(1); |
617 |
+ |
} |
618 |
+ |
if (CEQ(pr[WHT][CIEX],0.) | CEQ(pr[WHT][CIEY],0.)) |
619 |
+ |
return(0); |
620 |
|
C_rD = (1./pr[WHT][CIEY]) * |
621 |
|
( pr[WHT][CIEX]*(pr[GRN][CIEY] - pr[BLU][CIEY]) - |
622 |
|
pr[WHT][CIEY]*(pr[GRN][CIEX] - pr[BLU][CIEX]) + |
623 |
|
pr[GRN][CIEX]*pr[BLU][CIEY] - pr[BLU][CIEX]*pr[GRN][CIEY] ) ; |
624 |
+ |
if (CEQ(C_rD,0.)) |
625 |
+ |
return(0); |
626 |
|
C_gD = (1./pr[WHT][CIEY]) * |
627 |
|
( pr[WHT][CIEX]*(pr[BLU][CIEY] - pr[RED][CIEY]) - |
628 |
|
pr[WHT][CIEY]*(pr[BLU][CIEX] - pr[RED][CIEX]) - |
629 |
|
pr[RED][CIEX]*pr[BLU][CIEY] + pr[BLU][CIEX]*pr[RED][CIEY] ) ; |
630 |
+ |
if (CEQ(C_gD,0.)) |
631 |
+ |
return(0); |
632 |
|
C_bD = (1./pr[WHT][CIEY]) * |
633 |
|
( pr[WHT][CIEX]*(pr[RED][CIEY] - pr[GRN][CIEY]) - |
634 |
|
pr[WHT][CIEY]*(pr[RED][CIEX] - pr[GRN][CIEX]) + |
635 |
|
pr[RED][CIEX]*pr[GRN][CIEY] - pr[GRN][CIEX]*pr[RED][CIEY] ) ; |
636 |
< |
|
636 |
> |
if (CEQ(C_bD,0.)) |
637 |
> |
return(0); |
638 |
|
mat[0][0] = (pr[GRN][CIEY] - pr[BLU][CIEY] - |
639 |
|
pr[BLU][CIEX]*pr[GRN][CIEY] + |
640 |
|
pr[BLU][CIEY]*pr[GRN][CIEX])/C_rD ; |
659 |
|
pr[RED][CIEX]*pr[GRN][CIEY])/C_bD ; |
660 |
|
mat[2][2] = (pr[RED][CIEX]*pr[GRN][CIEY] - |
661 |
|
pr[GRN][CIEX]*pr[RED][CIEY])/C_bD ; |
662 |
+ |
return(1); |
663 |
|
} |
664 |
|
|
665 |
|
|
666 |
< |
void |
667 |
< |
comprgb2xyzmat(mat, pr) /* compute conversion from RGB to CIE space */ |
668 |
< |
COLORMAT mat; |
669 |
< |
register RGBPRIMS pr; |
666 |
> |
int |
667 |
> |
comprgb2xyzmat( /* compute conversion from RGB to CIE space */ |
668 |
> |
COLORMAT mat, |
669 |
> |
RGBPRIMS pr |
670 |
> |
) |
671 |
|
{ |
672 |
|
double C_rD, C_gD, C_bD, D; |
673 |
|
|
674 |
|
if (pr == stdprims) { /* can use rgb2xyzmat */ |
675 |
|
cpcolormat(mat, rgb2xyzmat); |
676 |
< |
return; |
676 |
> |
return(1); |
677 |
|
} |
678 |
+ |
if (pr == xyzprims) { /* identity */ |
679 |
+ |
memset(mat, 0, sizeof(COLORMAT)); |
680 |
+ |
mat[0][0] = mat[1][1] = mat[2][2] = 1.f; |
681 |
+ |
return(1); |
682 |
+ |
} |
683 |
+ |
if (CEQ(pr[WHT][CIEX],0.) | CEQ(pr[WHT][CIEY],0.)) |
684 |
+ |
return(0); |
685 |
|
C_rD = (1./pr[WHT][CIEY]) * |
686 |
|
( pr[WHT][CIEX]*(pr[GRN][CIEY] - pr[BLU][CIEY]) - |
687 |
|
pr[WHT][CIEY]*(pr[GRN][CIEX] - pr[BLU][CIEX]) + |
697 |
|
D = pr[RED][CIEX]*(pr[GRN][CIEY] - pr[BLU][CIEY]) + |
698 |
|
pr[GRN][CIEX]*(pr[BLU][CIEY] - pr[RED][CIEY]) + |
699 |
|
pr[BLU][CIEX]*(pr[RED][CIEY] - pr[GRN][CIEY]) ; |
700 |
+ |
if (CEQ(D,0.)) |
701 |
+ |
return(0); |
702 |
|
mat[0][0] = pr[RED][CIEX]*C_rD/D; |
703 |
|
mat[0][1] = pr[GRN][CIEX]*C_gD/D; |
704 |
|
mat[0][2] = pr[BLU][CIEX]*C_bD/D; |
708 |
|
mat[2][0] = (1.-pr[RED][CIEX]-pr[RED][CIEY])*C_rD/D; |
709 |
|
mat[2][1] = (1.-pr[GRN][CIEX]-pr[GRN][CIEY])*C_gD/D; |
710 |
|
mat[2][2] = (1.-pr[BLU][CIEX]-pr[BLU][CIEY])*C_bD/D; |
711 |
+ |
return(1); |
712 |
|
} |
713 |
|
|
714 |
|
|
715 |
< |
void |
716 |
< |
comprgb2rgbmat(mat, pr1, pr2) /* compute conversion from RGB1 to RGB2 */ |
717 |
< |
COLORMAT mat; |
718 |
< |
RGBPRIMS pr1, pr2; |
715 |
> |
int |
716 |
> |
comprgb2rgbmat( /* compute conversion from RGB1 to RGB2 */ |
717 |
> |
COLORMAT mat, |
718 |
> |
RGBPRIMS pr1, |
719 |
> |
RGBPRIMS pr2 |
720 |
> |
) |
721 |
|
{ |
722 |
|
COLORMAT pr1toxyz, xyztopr2; |
723 |
|
|
724 |
|
if (pr1 == pr2) { |
725 |
< |
mat[0][0] = mat[1][1] = mat[2][2] = 1.0; |
726 |
< |
mat[0][1] = mat[0][2] = mat[1][0] = |
727 |
< |
mat[1][2] = mat[2][0] = mat[2][1] = 0.0; |
329 |
< |
return; |
725 |
> |
memset(mat, 0, sizeof(COLORMAT)); |
726 |
> |
mat[0][0] = mat[1][1] = mat[2][2] = 1.f; |
727 |
> |
return(1); |
728 |
|
} |
729 |
< |
comprgb2xyzmat(pr1toxyz, pr1); |
730 |
< |
compxyz2rgbmat(xyztopr2, pr2); |
729 |
> |
if (!comprgb2xyzmat(pr1toxyz, pr1)) |
730 |
> |
return(0); |
731 |
> |
if (!compxyz2rgbmat(xyztopr2, pr2)) |
732 |
> |
return(0); |
733 |
|
/* combine transforms */ |
734 |
|
multcolormat(mat, pr1toxyz, xyztopr2); |
735 |
+ |
return(1); |
736 |
|
} |
737 |
|
|
738 |
|
|
739 |
< |
void |
740 |
< |
compxyzWBmat(mat, wht1, wht2) /* CIE von Kries transform from wht1 to wht2 */ |
741 |
< |
COLORMAT mat; |
742 |
< |
float wht1[2], wht2[2]; |
739 |
> |
int |
740 |
> |
compxyzWBmat( /* CIE von Kries transform from wht1 to wht2 */ |
741 |
> |
COLORMAT mat, |
742 |
> |
const float wht1[2], |
743 |
> |
const float wht2[2] |
744 |
> |
) |
745 |
|
{ |
746 |
|
COLOR cw1, cw2; |
747 |
|
if (XYEQ(wht1,wht2)) { |
748 |
< |
mat[0][0] = mat[1][1] = mat[2][2] = 1.0; |
749 |
< |
mat[0][1] = mat[0][2] = mat[1][0] = |
750 |
< |
mat[1][2] = mat[2][0] = mat[2][1] = 0.0; |
348 |
< |
return; |
748 |
> |
memset(mat, 0, sizeof(COLORMAT)); |
749 |
> |
mat[0][0] = mat[1][1] = mat[2][2] = 1.f; |
750 |
> |
return(1); |
751 |
|
} |
752 |
+ |
if (CEQ(wht1[CIEX],0.) | CEQ(wht1[CIEY],0.)) |
753 |
+ |
return(0); |
754 |
|
cw1[RED] = wht1[CIEX]/wht1[CIEY]; |
755 |
|
cw1[GRN] = 1.; |
756 |
|
cw1[BLU] = (1. - wht1[CIEX] - wht1[CIEY])/wht1[CIEY]; |
757 |
|
colortrans(cw1, vkmat, cw1); |
758 |
+ |
if (CEQ(wht2[CIEX],0.) | CEQ(wht2[CIEY],0.)) |
759 |
+ |
return(0); |
760 |
|
cw2[RED] = wht2[CIEX]/wht2[CIEY]; |
761 |
|
cw2[GRN] = 1.; |
762 |
|
cw2[BLU] = (1. - wht2[CIEX] - wht2[CIEY])/wht2[CIEY]; |
763 |
|
colortrans(cw2, vkmat, cw2); |
764 |
+ |
if (CEQ(cw1[RED],0.) | CEQ(cw1[GRN],0.) | CEQ(cw1[BLU],0.)) |
765 |
+ |
return(0); |
766 |
|
mat[0][0] = cw2[RED]/cw1[RED]; |
767 |
|
mat[1][1] = cw2[GRN]/cw1[GRN]; |
768 |
|
mat[2][2] = cw2[BLU]/cw1[BLU]; |
770 |
|
mat[1][2] = mat[2][0] = mat[2][1] = 0.0; |
771 |
|
multcolormat(mat, vkmat, mat); |
772 |
|
multcolormat(mat, mat, ivkmat); |
773 |
+ |
return(1); |
774 |
|
} |
775 |
|
|
776 |
|
|
777 |
< |
void |
778 |
< |
compxyz2rgbWBmat(mat, pr) /* von Kries conversion from CIE to RGB space */ |
779 |
< |
COLORMAT mat; |
780 |
< |
RGBPRIMS pr; |
777 |
> |
int |
778 |
> |
compxyz2rgbWBmat( /* von Kries conversion from CIE to RGB space */ |
779 |
> |
COLORMAT mat, |
780 |
> |
RGBPRIMS pr |
781 |
> |
) |
782 |
|
{ |
783 |
|
COLORMAT wbmat; |
784 |
|
|
785 |
< |
compxyz2rgbmat(mat, pr); |
785 |
> |
if (!compxyz2rgbmat(mat, pr)) |
786 |
> |
return(0); |
787 |
|
if (XYEQ(pr[WHT],xyneu)) |
788 |
< |
return; |
789 |
< |
compxyzWBmat(wbmat, xyneu, pr[WHT]); |
788 |
> |
return(1); |
789 |
> |
if (!compxyzWBmat(wbmat, xyneu, pr[WHT])) |
790 |
> |
return(0); |
791 |
|
multcolormat(mat, wbmat, mat); |
792 |
+ |
return(1); |
793 |
|
} |
794 |
|
|
795 |
< |
void |
796 |
< |
comprgb2xyzWBmat(mat, pr) /* von Kries conversion from RGB to CIE space */ |
797 |
< |
COLORMAT mat; |
798 |
< |
RGBPRIMS pr; |
795 |
> |
int |
796 |
> |
comprgb2xyzWBmat( /* von Kries conversion from RGB to CIE space */ |
797 |
> |
COLORMAT mat, |
798 |
> |
RGBPRIMS pr |
799 |
> |
) |
800 |
|
{ |
801 |
|
COLORMAT wbmat; |
802 |
|
|
803 |
< |
comprgb2xyzmat(mat, pr); |
803 |
> |
if (!comprgb2xyzmat(mat, pr)) |
804 |
> |
return(0); |
805 |
|
if (XYEQ(pr[WHT],xyneu)) |
806 |
< |
return; |
807 |
< |
compxyzWBmat(wbmat, pr[WHT], xyneu); |
806 |
> |
return(1); |
807 |
> |
if (!compxyzWBmat(wbmat, pr[WHT], xyneu)) |
808 |
> |
return(0); |
809 |
|
multcolormat(mat, mat, wbmat); |
810 |
+ |
return(1); |
811 |
|
} |
812 |
|
|
813 |
< |
void |
814 |
< |
comprgb2rgbWBmat(mat, pr1, pr2) /* von Kries conversion from RGB1 to RGB2 */ |
815 |
< |
COLORMAT mat; |
816 |
< |
RGBPRIMS pr1, pr2; |
813 |
> |
int |
814 |
> |
comprgb2rgbWBmat( /* von Kries conversion from RGB1 to RGB2 */ |
815 |
> |
COLORMAT mat, |
816 |
> |
RGBPRIMS pr1, |
817 |
> |
RGBPRIMS pr2 |
818 |
> |
) |
819 |
|
{ |
820 |
|
COLORMAT pr1toxyz, xyztopr2, wbmat; |
821 |
|
|
822 |
|
if (pr1 == pr2) { |
823 |
< |
mat[0][0] = mat[1][1] = mat[2][2] = 1.0; |
824 |
< |
mat[0][1] = mat[0][2] = mat[1][0] = |
825 |
< |
mat[1][2] = mat[2][0] = mat[2][1] = 0.0; |
407 |
< |
return; |
823 |
> |
memset(mat, 0, sizeof(COLORMAT)); |
824 |
> |
mat[0][0] = mat[1][1] = mat[2][2] = 1.f; |
825 |
> |
return(1); |
826 |
|
} |
827 |
< |
comprgb2xyzmat(pr1toxyz, pr1); |
828 |
< |
compxyzWBmat(wbmat, pr1[WHT], pr2[WHT]); |
829 |
< |
compxyz2rgbmat(xyztopr2, pr2); |
827 |
> |
if (!comprgb2xyzmat(pr1toxyz, pr1)) |
828 |
> |
return(0); |
829 |
> |
if (!compxyzWBmat(wbmat, pr1[WHT], pr2[WHT])) |
830 |
> |
return(0); |
831 |
> |
if (!compxyz2rgbmat(xyztopr2, pr2)) |
832 |
> |
return(0); |
833 |
|
/* combine transforms */ |
834 |
|
multcolormat(mat, pr1toxyz, wbmat); |
835 |
|
multcolormat(mat, mat, xyztopr2); |
836 |
+ |
return(1); |
837 |
|
} |