| 10 |  |  | 
| 11 |  | #include "copyright.h" | 
| 12 |  |  | 
| 13 | < | #include "color.h" | 
| 13 | > | #include <stdio.h> | 
| 14 |  | #include <string.h> | 
| 15 | + | #include "color.h" | 
| 16 |  |  | 
| 17 |  | #define CEPS    1e-4                    /* color epsilon */ | 
| 18 |  |  | 
| 19 | < | #define CEQ(v1,v2)      ((v1) <= (v2)+CEPS && (v2) <= (v1)+CEPS) | 
| 19 | > | #define CEQ(v1,v2)      (((v1) <= (v2)+CEPS) & ((v2) <= (v1)+CEPS)) | 
| 20 |  |  | 
| 21 | < | #define XYEQ(c1,c2)     (CEQ((c1)[CIEX],(c2)[CIEX]) && CEQ((c1)[CIEY],(c2)[CIEY])) | 
| 21 | > | #define XYEQ(c1,c2)     (CEQ((c1)[CIEX],(c2)[CIEX]) & CEQ((c1)[CIEY],(c2)[CIEY])) | 
| 22 |  |  | 
| 23 |  |  | 
| 24 |  | RGBPRIMS  stdprims = STDPRIMS;  /* standard primary chromaticities */ | 
| 38 |  | #define  INCWL          10              /* wavelength increment */ | 
| 39 |  | #define  NINC           40              /* # of values */ | 
| 40 |  |  | 
| 41 | < | static BYTE  chroma[3][NINC] = { | 
| 41 | > | static uby8  chroma[3][NINC] = { | 
| 42 |  | {                                                       /* X */ | 
| 43 |  | 0,   0,   0,   2,   6,   13,  22,  30,  36,  41, | 
| 44 |  | 42,  43,  43,  44,  46,  52,  60,  71,  87,  106, | 
| 91 |  |  | 
| 92 |  |  | 
| 93 |  | void | 
| 94 | < | spec_rgb(col, s, e)             /* compute RGB color from spectral range */ | 
| 95 | < | COLOR  col; | 
| 96 | < | int  s, e; | 
| 94 | > | spec_rgb(                       /* compute RGB color from spectral range */ | 
| 95 | > | COLOR  col, | 
| 96 | > | int  s, | 
| 97 | > | int  e | 
| 98 | > | ) | 
| 99 |  | { | 
| 100 |  | COLOR  ciecolor; | 
| 101 |  |  | 
| 105 |  |  | 
| 106 |  |  | 
| 107 |  | void | 
| 108 | < | spec_cie(col, s, e)             /* compute a color from a spectral range */ | 
| 109 | < | COLOR  col;             /* returned color */ | 
| 110 | < | int  s, e;              /* starting and ending wavelengths */ | 
| 108 | > | spec_cie(                       /* compute a color from a spectral range */ | 
| 109 | > | COLOR  col,             /* returned color */ | 
| 110 | > | int  s,                 /* starting and ending wavelengths */ | 
| 111 | > | int  e | 
| 112 | > | ) | 
| 113 |  | { | 
| 114 | < | register int  i, d, r; | 
| 114 | > | int  i, d, r; | 
| 115 |  |  | 
| 116 |  | s -= STARTWL; | 
| 117 |  | if (s < 0) | 
| 142 |  |  | 
| 143 |  |  | 
| 144 |  | void | 
| 145 | < | cie_rgb(rgb, xyz)               /* convert CIE color to standard RGB */ | 
| 146 | < | COLOR   rgb; | 
| 147 | < | COLOR  xyz; | 
| 145 | > | cie_rgb(                        /* convert CIE color to standard RGB */ | 
| 146 | > | COLOR   rgb, | 
| 147 | > | COLOR  xyz | 
| 148 | > | ) | 
| 149 |  | { | 
| 150 |  | colortrans(rgb, xyz2rgbmat, xyz); | 
| 151 |  | clipgamut(rgb, xyz[CIEY], CGAMUT_LOWER, cblack, cwhite); | 
| 153 |  |  | 
| 154 |  |  | 
| 155 |  | int | 
| 156 | < | clipgamut(col, brt, gamut, lower, upper)        /* clip to gamut cube */ | 
| 157 | < | COLOR  col; | 
| 158 | < | double  brt; | 
| 159 | < | int  gamut; | 
| 160 | < | COLOR  lower, upper; | 
| 156 | > | clipgamut(                      /* clip to gamut cube */ | 
| 157 | > | COLOR  col, | 
| 158 | > | double  brt, | 
| 159 | > | int  gamut, | 
| 160 | > | COLOR  lower, | 
| 161 | > | COLOR  upper | 
| 162 | > | ) | 
| 163 |  | { | 
| 164 |  | int  rflags = 0; | 
| 165 |  | double  brtmin, brtmax, v, vv; | 
| 166 |  | COLOR  cgry; | 
| 167 | < | register int  i; | 
| 167 | > | int  i; | 
| 168 |  | /* check for no check */ | 
| 169 |  | if (gamut == 0) return(0); | 
| 170 |  | /* check brightness limits */ | 
| 185 |  | vv = 1.;                        /* check each limit */ | 
| 186 |  | for (i = 0; i < 3; i++) | 
| 187 |  | if (gamut & CGAMUT_LOWER && col[i] < lower[i]) { | 
| 188 | < | v = (lower[i]+CEPS - cgry[i])/(col[i] - cgry[i]); | 
| 188 | > | v = (lower[i] - cgry[i])/(col[i] - cgry[i]); | 
| 189 |  | if (v < vv) vv = v; | 
| 190 |  | rflags |= CGAMUT_LOWER; | 
| 191 |  | } else if (gamut & CGAMUT_UPPER && col[i] > upper[i]) { | 
| 192 | < | v = (upper[i]-CEPS - cgry[i])/(col[i] - cgry[i]); | 
| 192 | > | v = (upper[i] - cgry[i])/(col[i] - cgry[i]); | 
| 193 |  | if (v < vv) vv = v; | 
| 194 |  | rflags |= CGAMUT_UPPER; | 
| 195 |  | } | 
| 201 |  |  | 
| 202 |  |  | 
| 203 |  | void | 
| 204 | < | colortrans(c2, mat, c1)         /* convert c1 by mat and put into c2 */ | 
| 205 | < | register COLOR  c2; | 
| 206 | < | register COLORMAT  mat; | 
| 207 | < | register COLOR  c1; | 
| 204 | > | colortrans(                     /* convert c1 by mat and put into c2 */ | 
| 205 | > | COLOR  c2, | 
| 206 | > | COLORMAT  mat, | 
| 207 | > | COLOR  c1 | 
| 208 | > | ) | 
| 209 |  | { | 
| 210 |  | COLOR   cout; | 
| 211 |  |  | 
| 218 |  |  | 
| 219 |  |  | 
| 220 |  | void | 
| 221 | < | multcolormat(m3, m2, m1)        /* multiply m1 by m2 and put into m3 */ | 
| 222 | < | COLORMAT  m3;                   /* m3 can be either m1 or m2 w/o harm */ | 
| 223 | < | COLORMAT  m2, m1; | 
| 221 | > | multcolormat(                   /* multiply m1 by m2 and put into m3 */ | 
| 222 | > | COLORMAT  m3,                   /* m3 can be either m1 or m2 w/o harm */ | 
| 223 | > | COLORMAT  m2, | 
| 224 | > | COLORMAT  m1 | 
| 225 | > | ) | 
| 226 |  | { | 
| 227 |  | COLORMAT  mt; | 
| 228 | < | register int  i, j; | 
| 228 | > | int  i, j; | 
| 229 |  |  | 
| 230 |  | for (i = 0; i < 3; i++) | 
| 231 |  | for (j = 0; j < 3; j++) | 
| 236 |  | } | 
| 237 |  |  | 
| 238 |  |  | 
| 239 | < | void | 
| 240 | < | compxyz2rgbmat(mat, pr)         /* compute conversion from CIE to RGB space */ | 
| 241 | < | COLORMAT  mat; | 
| 242 | < | register RGBPRIMS  pr; | 
| 239 | > | int | 
| 240 | > | colorprimsOK(                   /* are color primaries reasonable? */ | 
| 241 | > | RGBPRIMS  pr | 
| 242 | > | ) | 
| 243 |  | { | 
| 244 | + | int     i, j; | 
| 245 | + | /* check white point */ | 
| 246 | + | if ((pr[3][CIEX] <= CEPS) | (pr[3][CIEX] >= 1.-CEPS) | | 
| 247 | + | (pr[3][CIEY] <= CEPS) | (pr[3][CIEY] >= 1.-CEPS)) | 
| 248 | + | return(0); | 
| 249 | + | for (i = 3; i--; )      /* check for XYZ color primaries */ | 
| 250 | + | if (!CEQ(pr[i][CIEX],(i==0)) | !CEQ(pr[i][CIEY],(i==1))) | 
| 251 | + | break; | 
| 252 | + | if (i < 0) | 
| 253 | + | return(-1);     /* flag as XYZ color space */ | 
| 254 | + | /* check color primaries */ | 
| 255 | + | for (i = 0; i < 3; i++) { | 
| 256 | + | if ((pr[i][CIEX] <= -2.) | (pr[i][CIEY] <= -2.)) | 
| 257 | + | return(0); | 
| 258 | + | if ((pr[i][CIEX] >= 3.) | (pr[i][CIEY] >= 3.)) | 
| 259 | + | return(0); | 
| 260 | + | if (pr[i][CIEX] + pr[i][CIEY] <= -2.) | 
| 261 | + | return(0); | 
| 262 | + | if (pr[i][CIEX] + pr[i][CIEY] >= 3.) | 
| 263 | + | return(0); | 
| 264 | + | } | 
| 265 | + | for (i = 0; i < 4; i++) /* make sure space is 3-dimensional */ | 
| 266 | + | for (j = i+1; j < 4; j++) | 
| 267 | + | if (CEQ(pr[i][CIEX],pr[j][CIEX]) & | 
| 268 | + | CEQ(pr[i][CIEY],pr[j][CIEY])) | 
| 269 | + | return(0); | 
| 270 | + | return(1); | 
| 271 | + | } | 
| 272 | + |  | 
| 273 | + |  | 
| 274 | + |  | 
| 275 | + | int | 
| 276 | + | compxyz2rgbmat(                 /* compute conversion from CIE to RGB space */ | 
| 277 | + | COLORMAT  mat, | 
| 278 | + | RGBPRIMS  pr | 
| 279 | + | ) | 
| 280 | + | { | 
| 281 |  | double  C_rD, C_gD, C_bD; | 
| 282 |  |  | 
| 283 |  | if (pr == stdprims) {   /* can use xyz2rgbmat */ | 
| 284 |  | cpcolormat(mat, xyz2rgbmat); | 
| 285 | < | return; | 
| 285 | > | return(1); | 
| 286 |  | } | 
| 287 | + | if (CEQ(pr[WHT][CIEX],0.) | CEQ(pr[WHT][CIEY],0.)) | 
| 288 | + | return(0); | 
| 289 |  | C_rD = (1./pr[WHT][CIEY]) * | 
| 290 |  | ( pr[WHT][CIEX]*(pr[GRN][CIEY] - pr[BLU][CIEY]) - | 
| 291 |  | pr[WHT][CIEY]*(pr[GRN][CIEX] - pr[BLU][CIEX]) + | 
| 292 |  | pr[GRN][CIEX]*pr[BLU][CIEY] - pr[BLU][CIEX]*pr[GRN][CIEY] ) ; | 
| 293 | + | if (CEQ(C_rD,0.)) | 
| 294 | + | return(0); | 
| 295 |  | C_gD = (1./pr[WHT][CIEY]) * | 
| 296 |  | ( pr[WHT][CIEX]*(pr[BLU][CIEY] - pr[RED][CIEY]) - | 
| 297 |  | pr[WHT][CIEY]*(pr[BLU][CIEX] - pr[RED][CIEX]) - | 
| 298 |  | pr[RED][CIEX]*pr[BLU][CIEY] + pr[BLU][CIEX]*pr[RED][CIEY] ) ; | 
| 299 | + | if (CEQ(C_gD,0.)) | 
| 300 | + | return(0); | 
| 301 |  | C_bD = (1./pr[WHT][CIEY]) * | 
| 302 |  | ( pr[WHT][CIEX]*(pr[RED][CIEY] - pr[GRN][CIEY]) - | 
| 303 |  | pr[WHT][CIEY]*(pr[RED][CIEX] - pr[GRN][CIEX]) + | 
| 304 |  | pr[RED][CIEX]*pr[GRN][CIEY] - pr[GRN][CIEX]*pr[RED][CIEY] ) ; | 
| 305 | < |  | 
| 305 | > | if (CEQ(C_bD,0.)) | 
| 306 | > | return(0); | 
| 307 |  | mat[0][0] = (pr[GRN][CIEY] - pr[BLU][CIEY] - | 
| 308 |  | pr[BLU][CIEX]*pr[GRN][CIEY] + | 
| 309 |  | pr[BLU][CIEY]*pr[GRN][CIEX])/C_rD ; | 
| 328 |  | pr[RED][CIEX]*pr[GRN][CIEY])/C_bD ; | 
| 329 |  | mat[2][2] = (pr[RED][CIEX]*pr[GRN][CIEY] - | 
| 330 |  | pr[GRN][CIEX]*pr[RED][CIEY])/C_bD ; | 
| 331 | + | return(1); | 
| 332 |  | } | 
| 333 |  |  | 
| 334 |  |  | 
| 335 | < | void | 
| 336 | < | comprgb2xyzmat(mat, pr)         /* compute conversion from RGB to CIE space */ | 
| 337 | < | COLORMAT  mat; | 
| 338 | < | register RGBPRIMS  pr; | 
| 335 | > | int | 
| 336 | > | comprgb2xyzmat(                 /* compute conversion from RGB to CIE space */ | 
| 337 | > | COLORMAT  mat, | 
| 338 | > | RGBPRIMS  pr | 
| 339 | > | ) | 
| 340 |  | { | 
| 341 |  | double  C_rD, C_gD, C_bD, D; | 
| 342 |  |  | 
| 343 |  | if (pr == stdprims) {   /* can use rgb2xyzmat */ | 
| 344 |  | cpcolormat(mat, rgb2xyzmat); | 
| 345 | < | return; | 
| 345 | > | return(1); | 
| 346 |  | } | 
| 347 | + | if (CEQ(pr[WHT][CIEX],0.) | CEQ(pr[WHT][CIEY],0.)) | 
| 348 | + | return(0); | 
| 349 |  | C_rD = (1./pr[WHT][CIEY]) * | 
| 350 |  | ( pr[WHT][CIEX]*(pr[GRN][CIEY] - pr[BLU][CIEY]) - | 
| 351 |  | pr[WHT][CIEY]*(pr[GRN][CIEX] - pr[BLU][CIEX]) + | 
| 361 |  | D = pr[RED][CIEX]*(pr[GRN][CIEY] - pr[BLU][CIEY]) + | 
| 362 |  | pr[GRN][CIEX]*(pr[BLU][CIEY] - pr[RED][CIEY]) + | 
| 363 |  | pr[BLU][CIEX]*(pr[RED][CIEY] - pr[GRN][CIEY]) ; | 
| 364 | + | if (CEQ(D,0.)) | 
| 365 | + | return(0); | 
| 366 |  | mat[0][0] = pr[RED][CIEX]*C_rD/D; | 
| 367 |  | mat[0][1] = pr[GRN][CIEX]*C_gD/D; | 
| 368 |  | mat[0][2] = pr[BLU][CIEX]*C_bD/D; | 
| 372 |  | mat[2][0] = (1.-pr[RED][CIEX]-pr[RED][CIEY])*C_rD/D; | 
| 373 |  | mat[2][1] = (1.-pr[GRN][CIEX]-pr[GRN][CIEY])*C_gD/D; | 
| 374 |  | mat[2][2] = (1.-pr[BLU][CIEX]-pr[BLU][CIEY])*C_bD/D; | 
| 375 | + | return(1); | 
| 376 |  | } | 
| 377 |  |  | 
| 378 |  |  | 
| 379 | < | void | 
| 380 | < | comprgb2rgbmat(mat, pr1, pr2)   /* compute conversion from RGB1 to RGB2 */ | 
| 381 | < | COLORMAT  mat; | 
| 382 | < | RGBPRIMS  pr1, pr2; | 
| 379 | > | int | 
| 380 | > | comprgb2rgbmat(                 /* compute conversion from RGB1 to RGB2 */ | 
| 381 | > | COLORMAT  mat, | 
| 382 | > | RGBPRIMS  pr1, | 
| 383 | > | RGBPRIMS  pr2 | 
| 384 | > | ) | 
| 385 |  | { | 
| 386 |  | COLORMAT  pr1toxyz, xyztopr2; | 
| 387 |  |  | 
| 389 |  | mat[0][0] = mat[1][1] = mat[2][2] = 1.0; | 
| 390 |  | mat[0][1] = mat[0][2] = mat[1][0] = | 
| 391 |  | mat[1][2] = mat[2][0] = mat[2][1] = 0.0; | 
| 392 | < | return; | 
| 392 | > | return(1); | 
| 393 |  | } | 
| 394 | < | comprgb2xyzmat(pr1toxyz, pr1); | 
| 395 | < | compxyz2rgbmat(xyztopr2, pr2); | 
| 394 | > | if (!comprgb2xyzmat(pr1toxyz, pr1)) | 
| 395 | > | return(0); | 
| 396 | > | if (!compxyz2rgbmat(xyztopr2, pr2)) | 
| 397 | > | return(0); | 
| 398 |  | /* combine transforms */ | 
| 399 |  | multcolormat(mat, pr1toxyz, xyztopr2); | 
| 400 | + | return(1); | 
| 401 |  | } | 
| 402 |  |  | 
| 403 |  |  | 
| 404 | < | void | 
| 405 | < | compxyzWBmat(mat, wht1, wht2)   /* CIE von Kries transform from wht1 to wht2 */ | 
| 406 | < | COLORMAT  mat; | 
| 407 | < | float  wht1[2], wht2[2]; | 
| 404 | > | int | 
| 405 | > | compxyzWBmat(                   /* CIE von Kries transform from wht1 to wht2 */ | 
| 406 | > | COLORMAT  mat, | 
| 407 | > | float  wht1[2], | 
| 408 | > | float  wht2[2] | 
| 409 | > | ) | 
| 410 |  | { | 
| 411 |  | COLOR   cw1, cw2; | 
| 412 |  | if (XYEQ(wht1,wht2)) { | 
| 413 |  | mat[0][0] = mat[1][1] = mat[2][2] = 1.0; | 
| 414 |  | mat[0][1] = mat[0][2] = mat[1][0] = | 
| 415 |  | mat[1][2] = mat[2][0] = mat[2][1] = 0.0; | 
| 416 | < | return; | 
| 416 | > | return(1); | 
| 417 |  | } | 
| 418 | + | if (CEQ(wht1[CIEX],0.) | CEQ(wht1[CIEY],0.)) | 
| 419 | + | return(0); | 
| 420 |  | cw1[RED] = wht1[CIEX]/wht1[CIEY]; | 
| 421 |  | cw1[GRN] = 1.; | 
| 422 |  | cw1[BLU] = (1. - wht1[CIEX] - wht1[CIEY])/wht1[CIEY]; | 
| 423 |  | colortrans(cw1, vkmat, cw1); | 
| 424 | + | if (CEQ(wht2[CIEX],0.) | CEQ(wht2[CIEY],0.)) | 
| 425 | + | return(0); | 
| 426 |  | cw2[RED] = wht2[CIEX]/wht2[CIEY]; | 
| 427 |  | cw2[GRN] = 1.; | 
| 428 |  | cw2[BLU] = (1. - wht2[CIEX] - wht2[CIEY])/wht2[CIEY]; | 
| 429 |  | colortrans(cw2, vkmat, cw2); | 
| 430 | + | if (CEQ(cw1[RED],0.) | CEQ(cw1[GRN],0.) | CEQ(cw1[BLU],0.)) | 
| 431 | + | return(0); | 
| 432 |  | mat[0][0] = cw2[RED]/cw1[RED]; | 
| 433 |  | mat[1][1] = cw2[GRN]/cw1[GRN]; | 
| 434 |  | mat[2][2] = cw2[BLU]/cw1[BLU]; | 
| 436 |  | mat[1][2] = mat[2][0] = mat[2][1] = 0.0; | 
| 437 |  | multcolormat(mat, vkmat, mat); | 
| 438 |  | multcolormat(mat, mat, ivkmat); | 
| 439 | + | return(1); | 
| 440 |  | } | 
| 441 |  |  | 
| 442 |  |  | 
| 443 | < | void | 
| 444 | < | compxyz2rgbWBmat(mat, pr)       /* von Kries conversion from CIE to RGB space */ | 
| 445 | < | COLORMAT  mat; | 
| 446 | < | RGBPRIMS  pr; | 
| 443 | > | int | 
| 444 | > | compxyz2rgbWBmat(               /* von Kries conversion from CIE to RGB space */ | 
| 445 | > | COLORMAT  mat, | 
| 446 | > | RGBPRIMS  pr | 
| 447 | > | ) | 
| 448 |  | { | 
| 449 |  | COLORMAT        wbmat; | 
| 450 |  |  | 
| 451 | < | compxyz2rgbmat(mat, pr); | 
| 451 | > | if (!compxyz2rgbmat(mat, pr)) | 
| 452 | > | return(0); | 
| 453 |  | if (XYEQ(pr[WHT],xyneu)) | 
| 454 | < | return; | 
| 455 | < | compxyzWBmat(wbmat, xyneu, pr[WHT]); | 
| 454 | > | return(1); | 
| 455 | > | if (!compxyzWBmat(wbmat, xyneu, pr[WHT])) | 
| 456 | > | return(0); | 
| 457 |  | multcolormat(mat, wbmat, mat); | 
| 458 | + | return(1); | 
| 459 |  | } | 
| 460 |  |  | 
| 461 | < | void | 
| 462 | < | comprgb2xyzWBmat(mat, pr)       /* von Kries conversion from RGB to CIE space */ | 
| 463 | < | COLORMAT  mat; | 
| 464 | < | RGBPRIMS  pr; | 
| 461 | > | int | 
| 462 | > | comprgb2xyzWBmat(               /* von Kries conversion from RGB to CIE space */ | 
| 463 | > | COLORMAT  mat, | 
| 464 | > | RGBPRIMS  pr | 
| 465 | > | ) | 
| 466 |  | { | 
| 467 |  | COLORMAT        wbmat; | 
| 468 |  |  | 
| 469 | < | comprgb2xyzmat(mat, pr); | 
| 469 | > | if (!comprgb2xyzmat(mat, pr)) | 
| 470 | > | return(0); | 
| 471 |  | if (XYEQ(pr[WHT],xyneu)) | 
| 472 | < | return; | 
| 473 | < | compxyzWBmat(wbmat, pr[WHT], xyneu); | 
| 472 | > | return(1); | 
| 473 | > | if (!compxyzWBmat(wbmat, pr[WHT], xyneu)) | 
| 474 | > | return(0); | 
| 475 |  | multcolormat(mat, mat, wbmat); | 
| 476 | + | return(1); | 
| 477 |  | } | 
| 478 |  |  | 
| 479 | < | void | 
| 480 | < | comprgb2rgbWBmat(mat, pr1, pr2) /* von Kries conversion from RGB1 to RGB2 */ | 
| 481 | < | COLORMAT  mat; | 
| 482 | < | RGBPRIMS  pr1, pr2; | 
| 479 | > | int | 
| 480 | > | comprgb2rgbWBmat(               /* von Kries conversion from RGB1 to RGB2 */ | 
| 481 | > | COLORMAT  mat, | 
| 482 | > | RGBPRIMS  pr1, | 
| 483 | > | RGBPRIMS  pr2 | 
| 484 | > | ) | 
| 485 |  | { | 
| 486 |  | COLORMAT  pr1toxyz, xyztopr2, wbmat; | 
| 487 |  |  | 
| 489 |  | mat[0][0] = mat[1][1] = mat[2][2] = 1.0; | 
| 490 |  | mat[0][1] = mat[0][2] = mat[1][0] = | 
| 491 |  | mat[1][2] = mat[2][0] = mat[2][1] = 0.0; | 
| 492 | < | return; | 
| 492 | > | return(1); | 
| 493 |  | } | 
| 494 | < | comprgb2xyzmat(pr1toxyz, pr1); | 
| 495 | < | compxyzWBmat(wbmat, pr1[WHT], pr2[WHT]); | 
| 496 | < | compxyz2rgbmat(xyztopr2, pr2); | 
| 494 | > | if (!comprgb2xyzmat(pr1toxyz, pr1)) | 
| 495 | > | return(0); | 
| 496 | > | if (!compxyzWBmat(wbmat, pr1[WHT], pr2[WHT])) | 
| 497 | > | return(0); | 
| 498 | > | if (!compxyz2rgbmat(xyztopr2, pr2)) | 
| 499 | > | return(0); | 
| 500 |  | /* combine transforms */ | 
| 501 |  | multcolormat(mat, pr1toxyz, wbmat); | 
| 502 |  | multcolormat(mat, mat, xyztopr2); | 
| 503 | + | return(1); | 
| 504 |  | } |