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/* Copyright (c) 1996 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* Input and output conditioning routines for pcond. |
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* Added white-balance adjustment 10/01 (GW). |
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*/ |
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#include "pcond.h" |
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#include "warp3d.h" |
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RGBPRIMP inprims = stdprims; /* input primaries */ |
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double inpexp = 1.0; /* input exposure value */ |
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char *mbcalfile = NULL; /* macbethcal mapping file */ |
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char *cwarpfile = NULL; /* color space warping file */ |
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static struct mbc { |
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float xa[3][6], ya[3][6]; |
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COLORMAT cmat; |
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float xa[3][6], ya[3][6]; |
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COLOR cmin, cmax; |
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} mbcond; /* macbethcal conditioning struct */ |
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static WARP3D *cwarp; /* color warping structure */ |
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static COLOR *scanbuf; /* scanline processing buffer */ |
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static int nread; /* number of scanlines processed */ |
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nextscan() /* read and condition next scanline */ |
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{ |
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if (nread >= numscans(&inpres)) { |
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#ifdef DEBUG |
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fputs("done\n", stderr); |
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#endif |
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return(NULL); |
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if (cwarpfile != NULL) |
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free3dw(cwarp); |
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free((void *)scanbuf); |
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return(scanbuf = NULL); |
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} |
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if (what2do&DO_ACUITY) |
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acuscan(scanbuf, nread); |
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mapscan(scanbuf, scanlen(&inpres)); |
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if (mbcalfile != NULL) /* device color correction */ |
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mbscan(scanbuf, scanlen(&inpres), &mbcond); |
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else if (cwarpfile != NULL) /* device color space warp */ |
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cwscan(scanbuf, scanlen(&inpres), cwarp); |
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else if (lumf == cielum | inprims != outprims) |
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matscan(scanbuf, scanlen(&inpres), mbcond.cmat); |
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nread++; |
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{ |
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if (mbcalfile != NULL) /* load macbethcal file */ |
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getmbcalfile(mbcalfile, &mbcond); |
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else |
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else if (cwarpfile != NULL) { |
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if ((cwarp = load3dw(cwarpfile, NULL)) == NULL) |
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syserror(cwarpfile); |
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} else |
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if (lumf == rgblum) |
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comprgb2rgbmat(mbcond.cmat, inprims, outprims); |
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comprgb2rgbWBmat(mbcond.cmat, inprims, outprims); |
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else |
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compxyz2rgbmat(mbcond.cmat, outprims); |
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if (what2do&DO_ACUITY) { |
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#ifdef DEBUG |
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fprintf(stderr, "%s: initializing acuity sampling...", |
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progname); |
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#endif |
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compxyz2rgbWBmat(mbcond.cmat, outprims); |
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if (what2do&DO_ACUITY) |
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initacuity(); |
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#ifdef DEBUG |
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fprintf(stderr, "done\n"); |
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#endif |
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} |
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scanbuf = (COLOR *)malloc(scanlen(&inpres)*sizeof(COLOR)); |
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if (scanbuf == NULL) |
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syserror("malloc"); |
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nread = 0; |
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#ifdef DEBUG |
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fprintf(stderr, "%s: processing image...", progname); |
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#endif |
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return(nextscan()); |
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} |
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{ |
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while (len--) { |
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colortrans(sl[0], mat, sl[0]); |
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clipgamut(sl[0], bright(sl[0]), CGAMUT, cblack, cwhite); |
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sl++; |
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} |
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} |
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register int i, j; |
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while (len--) { |
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colortrans(sl[0], mb->cmat, sl[0]); |
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clipgamut(sl[0], bright(sl[0]), CGAMUT, mb->cmin, mb->cmax); |
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for (i = 0; i < 3; i++) { |
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d = colval(sl[0],i); |
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for (j = 0; j < 4 && mb->xa[i][j+1] <= d; j++) |
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(d - mb->xa[i][j])*mb->ya[i][j+1] ) / |
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(mb->xa[i][j+1] - mb->xa[i][j]); |
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} |
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colortrans(sl[0], mb->cmat, sl[0]); |
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sl++; |
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} |
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} |
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cwscan(sl, len, wp) /* apply color space warp to scaline */ |
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COLOR *sl; |
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int len; |
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WARP3D *wp; |
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{ |
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int rval; |
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while (len--) { |
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rval = warp3d(sl[0], sl[0], wp); |
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if (rval & W3ERROR) |
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syserror("warp3d"); |
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if (rval & W3BADMAP) { |
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fprintf(stderr, "%s: %s: bad color space map\n", |
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progname, cwarpfile); |
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exit(1); |
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} |
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clipgamut(sl[0], bright(sl[0]), CGAMUT, cblack, cwhite); |
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sl++; |
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} |
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} |
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getmbcalfile(fn, mb) /* load macbethcal file */ |
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char *fn; |
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register struct mbc *mb; |
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char buf[128]; |
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FILE *fp; |
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int inpflags = 0; |
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register int i; |
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if ((fp = fopen(fn, "r")) == NULL) |
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syserror(fn); |
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exit(1); |
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} |
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fclose(fp); |
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/* compute gamut */ |
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for (i = 0; i < 3; i++) { |
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colval(mb->cmin,i) = mb->xa[i][0] - |
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mb->ya[i][0] * |
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(mb->xa[i][1]-mb->xa[i][0]) / |
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(mb->ya[i][1]-mb->ya[i][0]); |
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colval(mb->cmax,i) = mb->xa[i][4] + |
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(1.-mb->ya[i][4]) * |
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(mb->xa[i][5] - mb->xa[i][4]) / |
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(mb->ya[i][5] - mb->ya[i][4]); |
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} |
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} |