| 1 | – | /* Copyright (c) 1996 Regents of the University of California */ | 
| 2 | – |  | 
| 1 |  | #ifndef lint | 
| 2 | < | static char SCCSid[] = "$SunId$ LBL"; | 
| 2 | > | static const char       RCSid[] = "$Id$"; | 
| 3 |  | #endif | 
| 6 | – |  | 
| 4 |  | /* | 
| 5 |  | * Input and output conditioning routines for pcond. | 
| 6 | + | *  Added white-balance adjustment 10/01 (GW). | 
| 7 |  | */ | 
| 8 |  |  | 
| 9 |  | #include "pcond.h" | 
| 10 | + | #include "warp3d.h" | 
| 11 |  |  | 
| 12 |  |  | 
| 13 |  | RGBPRIMP        inprims = stdprims;     /* input primaries */ | 
| 18 |  | double  inpexp = 1.0;                   /* input exposure value */ | 
| 19 |  |  | 
| 20 |  | char    *mbcalfile = NULL;              /* macbethcal mapping file */ | 
| 21 | + | char    *cwarpfile = NULL;              /* color space warping file */ | 
| 22 |  |  | 
| 23 |  | static struct mbc { | 
| 24 | – | float   xa[3][6], ya[3][6]; | 
| 24 |  | COLORMAT        cmat; | 
| 25 | + | float   xa[3][6], ya[3][6]; | 
| 26 | + | COLOR   cmin, cmax; | 
| 27 |  | }       mbcond;                         /* macbethcal conditioning struct */ | 
| 28 |  |  | 
| 29 | + | static WARP3D   *cwarp;                 /* color warping structure */ | 
| 30 | + |  | 
| 31 |  | static COLOR    *scanbuf;               /* scanline processing buffer */ | 
| 32 |  | static int      nread;                  /* number of scanlines processed */ | 
| 33 |  |  | 
| 34 | + | static void sfscan(COLOR *sl, int len, double sf); | 
| 35 | + | static void matscan(COLOR *sl, int len, COLORMAT mat); | 
| 36 | + | static void mbscan(COLOR *sl, int len, struct mbc *mb); | 
| 37 | + | static void cwscan(COLOR *sl, int len, WARP3D *wp); | 
| 38 | + | static void getmbcalfile(char *fn, struct mbc *mb); | 
| 39 |  |  | 
| 40 | < | double | 
| 41 | < | rgblum(clr, scotopic)           /* compute (scotopic) luminance of RGB color */ | 
| 42 | < | COLOR   clr; | 
| 43 | < | int     scotopic; | 
| 40 | > |  | 
| 41 | > | extern double | 
| 42 | > | rgblum(         /* compute (scotopic) luminance of RGB color */ | 
| 43 | > | COLOR   clr, | 
| 44 | > | int     scotopic | 
| 45 | > | ) | 
| 46 |  | { | 
| 47 |  | if (scotopic)           /* approximate */ | 
| 48 |  | return( WHTSEFFICACY * (colval(clr,RED)*.062 + | 
| 53 |  | } | 
| 54 |  |  | 
| 55 |  |  | 
| 56 | < | double | 
| 57 | < | cielum(xyz, scotopic)           /* compute (scotopic) luminance of CIE color */ | 
| 58 | < | COLOR   xyz; | 
| 59 | < | int     scotopic; | 
| 56 | > | extern double | 
| 57 | > | cielum(         /* compute (scotopic) luminance of CIE color */ | 
| 58 | > | COLOR   xyz, | 
| 59 | > | int     scotopic | 
| 60 | > | ) | 
| 61 |  | { | 
| 62 |  | if (scotopic)           /* approximate */ | 
| 63 |  | return(colval(xyz,CIEY) * | 
| 67 |  | } | 
| 68 |  |  | 
| 69 |  |  | 
| 70 | < | COLOR * | 
| 71 | < | nextscan()                              /* read and condition next scanline */ | 
| 70 | > | extern COLOR * | 
| 71 | > | nextscan(void)                          /* read and condition next scanline */ | 
| 72 |  | { | 
| 73 |  | if (nread >= numscans(&inpres)) { | 
| 74 | < | free((char *)scanbuf); | 
| 74 | > | if (cwarpfile != NULL) | 
| 75 | > | free3dw(cwarp); | 
| 76 | > | free((void *)scanbuf); | 
| 77 |  | return(scanbuf = NULL); | 
| 78 |  | } | 
| 79 |  | if (what2do&DO_ACUITY) | 
| 93 |  | mapscan(scanbuf, scanlen(&inpres)); | 
| 94 |  | if (mbcalfile != NULL)                  /* device color correction */ | 
| 95 |  | mbscan(scanbuf, scanlen(&inpres), &mbcond); | 
| 96 | < | else if (lumf == cielum | inprims != outprims) | 
| 96 | > | else if (cwarpfile != NULL)             /* device color space warp */ | 
| 97 | > | cwscan(scanbuf, scanlen(&inpres), cwarp); | 
| 98 | > | else if ((lumf == cielum) | (inprims != outprims)) | 
| 99 |  | matscan(scanbuf, scanlen(&inpres), mbcond.cmat); | 
| 100 |  | nread++; | 
| 101 |  | return(scanbuf); | 
| 102 |  | } | 
| 103 |  |  | 
| 104 |  |  | 
| 105 | < | COLOR * | 
| 106 | < | firstscan()                             /* return first processed scanline */ | 
| 105 | > | extern COLOR * | 
| 106 | > | firstscan(void)                         /* return first processed scanline */ | 
| 107 |  | { | 
| 108 |  | if (mbcalfile != NULL)          /* load macbethcal file */ | 
| 109 |  | getmbcalfile(mbcalfile, &mbcond); | 
| 110 | < | else | 
| 110 | > | else if (cwarpfile != NULL) { | 
| 111 | > | if ((cwarp = load3dw(cwarpfile, NULL)) == NULL) | 
| 112 | > | syserror(cwarpfile); | 
| 113 | > | } else | 
| 114 |  | if (lumf == rgblum) | 
| 115 | < | comprgb2rgbmat(mbcond.cmat, inprims, outprims); | 
| 115 | > | comprgb2rgbWBmat(mbcond.cmat, inprims, outprims); | 
| 116 |  | else | 
| 117 | < | compxyz2rgbmat(mbcond.cmat, outprims); | 
| 118 | < | if (what2do&DO_ACUITY) | 
| 119 | < | initacuity(); | 
| 117 | > | compxyz2rgbWBmat(mbcond.cmat, outprims); | 
| 118 | > | if (what2do&DO_ACUITY && !initacuity()) { | 
| 119 | > | fprintf(stderr, "%s: warning - cannot initialize acuity pass\n", | 
| 120 | > | progname); | 
| 121 | > | what2do &= ~DO_ACUITY; | 
| 122 | > | } | 
| 123 |  | scanbuf = (COLOR *)malloc(scanlen(&inpres)*sizeof(COLOR)); | 
| 124 |  | if (scanbuf == NULL) | 
| 125 |  | syserror("malloc"); | 
| 128 |  | } | 
| 129 |  |  | 
| 130 |  |  | 
| 131 | < | sfscan(sl, len, sf)                     /* apply scalefactor to scanline */ | 
| 132 | < | register COLOR  *sl; | 
| 133 | < | int     len; | 
| 134 | < | double  sf; | 
| 131 | > | static void | 
| 132 | > | sfscan(                 /* apply scalefactor to scanline */ | 
| 133 | > | register COLOR  *sl, | 
| 134 | > | int     len, | 
| 135 | > | double  sf | 
| 136 | > | ) | 
| 137 |  | { | 
| 138 |  | while (len--) { | 
| 139 |  | scalecolor(sl[0], sf); | 
| 142 |  | } | 
| 143 |  |  | 
| 144 |  |  | 
| 145 | < | matscan(sl, len, mat)                   /* apply color matrix to scaline */ | 
| 146 | < | register COLOR  *sl; | 
| 147 | < | int     len; | 
| 148 | < | COLORMAT        mat; | 
| 145 | > | static void | 
| 146 | > | matscan(                        /* apply color matrix to scaline */ | 
| 147 | > | register COLOR  *sl, | 
| 148 | > | int     len, | 
| 149 | > | COLORMAT        mat | 
| 150 | > | ) | 
| 151 |  | { | 
| 152 |  | while (len--) { | 
| 153 |  | colortrans(sl[0], mat, sl[0]); | 
| 154 | + | clipgamut(sl[0], bright(sl[0]), CGAMUT, cblack, cwhite); | 
| 155 |  | sl++; | 
| 156 |  | } | 
| 157 |  | } | 
| 158 |  |  | 
| 159 |  |  | 
| 160 | < | mbscan(sl, len, mb)                     /* apply macbethcal adj. to scaline */ | 
| 161 | < | COLOR   *sl; | 
| 162 | < | int     len; | 
| 163 | < | register struct mbc     *mb; | 
| 160 | > | static void | 
| 161 | > | mbscan(                 /* apply macbethcal adj. to scaline */ | 
| 162 | > | COLOR   *sl, | 
| 163 | > | int     len, | 
| 164 | > | register struct mbc     *mb | 
| 165 | > | ) | 
| 166 |  | { | 
| 167 |  | double  d; | 
| 168 |  | register int    i, j; | 
| 169 |  |  | 
| 170 |  | while (len--) { | 
| 171 |  | colortrans(sl[0], mb->cmat, sl[0]); | 
| 172 | + | clipgamut(sl[0], bright(sl[0]), CGAMUT, mb->cmin, mb->cmax); | 
| 173 |  | for (i = 0; i < 3; i++) { | 
| 174 |  | d = colval(sl[0],i); | 
| 175 |  | for (j = 0; j < 4 && mb->xa[i][j+1] <= d; j++) | 
| 183 |  | } | 
| 184 |  |  | 
| 185 |  |  | 
| 186 | < | getmbcalfile(fn, mb)                    /* load macbethcal file */ | 
| 187 | < | char    *fn; | 
| 188 | < | register struct mbc     *mb; | 
| 186 | > | static void | 
| 187 | > | cwscan(                 /* apply color space warp to scaline */ | 
| 188 | > | COLOR   *sl, | 
| 189 | > | int     len, | 
| 190 | > | WARP3D  *wp | 
| 191 | > | ) | 
| 192 |  | { | 
| 193 | < | extern char     *fgets(); | 
| 193 | > | int     rval; | 
| 194 | > |  | 
| 195 | > | while (len--) { | 
| 196 | > | rval = warp3d(sl[0], sl[0], wp); | 
| 197 | > | if (rval & W3ERROR) | 
| 198 | > | syserror("warp3d"); | 
| 199 | > | if (rval & W3BADMAP) { | 
| 200 | > | fprintf(stderr, "%s: %s: bad color space map\n", | 
| 201 | > | progname, cwarpfile); | 
| 202 | > | exit(1); | 
| 203 | > | } | 
| 204 | > | clipgamut(sl[0], bright(sl[0]), CGAMUT, cblack, cwhite); | 
| 205 | > | sl++; | 
| 206 | > | } | 
| 207 | > | } | 
| 208 | > |  | 
| 209 | > |  | 
| 210 | > | static void | 
| 211 | > | getmbcalfile(                   /* load macbethcal file */ | 
| 212 | > | char    *fn, | 
| 213 | > | register struct mbc     *mb | 
| 214 | > | ) | 
| 215 | > | { | 
| 216 |  | char    buf[128]; | 
| 217 |  | FILE    *fp; | 
| 218 |  | int     inpflags = 0; | 
| 219 | + | register int    i; | 
| 220 |  |  | 
| 221 |  | if ((fp = fopen(fn, "r")) == NULL) | 
| 222 |  | syserror(fn); | 
| 271 |  | inpflags |= 040; | 
| 272 |  | else if (!(inpflags & 0100) && | 
| 273 |  | sscanf(buf, | 
| 274 | < | "r = %f*r1 + %f*g1 + %f*b1", | 
| 274 | > | "ro = %f*rn + %f*gn + %f*bn", | 
| 275 |  | &mb->cmat[0][0], &mb->cmat[0][1], | 
| 276 |  | &mb->cmat[0][2]) == 3) | 
| 277 |  | inpflags |= 0100; | 
| 278 |  | else if (!(inpflags & 0200) && | 
| 279 |  | sscanf(buf, | 
| 280 | < | "g = %f*r1 + %f*g1 + %f*b1", | 
| 280 | > | "go = %f*rn + %f*gn + %f*bn", | 
| 281 |  | &mb->cmat[1][0], &mb->cmat[1][1], | 
| 282 |  | &mb->cmat[1][2]) == 3) | 
| 283 |  | inpflags |= 0200; | 
| 284 |  | else if (!(inpflags & 0400) && | 
| 285 |  | sscanf(buf, | 
| 286 | < | "b = %f*r1 + %f*g1 + %f*b1", | 
| 286 | > | "bo = %f*rn + %f*gn + %f*bn", | 
| 287 |  | &mb->cmat[2][0], &mb->cmat[2][1], | 
| 288 |  | &mb->cmat[2][2]) == 3) | 
| 289 |  | inpflags |= 0400; | 
| 295 |  | exit(1); | 
| 296 |  | } | 
| 297 |  | fclose(fp); | 
| 298 | + | /* compute gamut */ | 
| 299 | + | for (i = 0; i < 3; i++) { | 
| 300 | + | colval(mb->cmin,i) = mb->xa[i][0] - | 
| 301 | + | mb->ya[i][0] * | 
| 302 | + | (mb->xa[i][1]-mb->xa[i][0]) / | 
| 303 | + | (mb->ya[i][1]-mb->ya[i][0]); | 
| 304 | + | colval(mb->cmax,i) = mb->xa[i][4] + | 
| 305 | + | (1.-mb->ya[i][4]) * | 
| 306 | + | (mb->xa[i][5] - mb->xa[i][4]) / | 
| 307 | + | (mb->ya[i][5] - mb->ya[i][4]); | 
| 308 | + | } | 
| 309 |  | } |