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root/radiance/ray/src/px/ra_tiff.c
Revision: 2.31
Committed: Tue Jun 7 16:54:23 2005 UTC (18 years, 10 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R7P1
Changes since 2.30: +7 -1 lines
Log Message: 
Added missing error checks for 16-bit and 32-bit separate color planes

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2 greg 2.31 static const char RCSid[] = "$Id: ra_tiff.c,v 2.30 2005/03/22 15:26:05 greg Exp $";
3 greg 1.1 #endif
4     /*
5 gregl 2.9 * Program to convert between RADIANCE and TIFF files.
6 greg 2.20 * Added LogLuv encodings 7/97 (GWL).
7     * Added white-balance adjustment 10/01 (GW).
8 greg 1.1 */
9    
10     #include <stdio.h>
11 greg 2.3 #include <math.h>
12 greg 2.22 #include <ctype.h>
13 greg 2.24 #include <time.h>
14 schorsch 2.27 #include <string.h>
15    
16 greg 1.1 #include "tiffio.h"
17     #include "color.h"
18 greg 1.6 #include "resolu.h"
19    
20 greg 2.8 #define GAMCOR 2.2 /* default gamma */
21    
22 gregl 2.9 /* conversion flags */
23     #define C_CXFM 0x1 /* needs color transformation */
24     #define C_GAMUT 0x2 /* needs gamut mapping */
25     #define C_GAMMA 0x4 /* needs gamma correction */
26     #define C_GRY 0x8 /* TIFF is greyscale */
27     #define C_XYZE 0x10 /* Radiance is XYZE */
28     #define C_RFLT 0x20 /* Radiance data is float */
29     #define C_TFLT 0x40 /* TIFF data is float */
30 gwlarson 2.19 #define C_TWRD 0x80 /* TIFF data is 16-bit */
31     #define C_PRIM 0x100 /* has assigned primaries */
32 greg 1.1
33 schorsch 2.28 typedef void colcvf_t(uint32 y);
34    
35 gregl 2.9 struct {
36     uint16 flags; /* conversion flags (defined above) */
37 greg 2.22 char capdate[20]; /* capture date/time */
38     char owner[256]; /* content owner */
39 gregl 2.9 uint16 comp; /* TIFF compression type */
40 gregl 2.10 uint16 phot; /* TIFF photometric type */
41 gregl 2.9 uint16 pconf; /* TIFF planar configuration */
42     float gamcor; /* gamma correction value */
43     short bradj; /* Radiance exposure adjustment (stops) */
44     uint16 orient; /* visual orientation (TIFF spec.) */
45 gregl 2.11 double stonits; /* input conversion to nits */
46 gregl 2.9 float pixrat; /* pixel aspect ratio */
47     FILE *rfp; /* Radiance stream pointer */
48     TIFF *tif; /* TIFF pointer */
49     uint32 xmax, ymax; /* image dimensions */
50     COLORMAT cmat; /* color transformation matrix */
51     RGBPRIMS prims; /* RGB primaries */
52     union {
53     COLR *colrs; /* 4-byte ???E pointer */
54     COLOR *colors; /* float array pointer */
55     char *p; /* generic pointer */
56     } r; /* Radiance scanline */
57     union {
58     uint8 *bp; /* byte pointer */
59 gwlarson 2.18 uint16 *wp; /* word pointer */
60 gregl 2.9 float *fp; /* float pointer */
61     char *p; /* generic pointer */
62     } t; /* TIFF scanline */
63 schorsch 2.28 colcvf_t *tf; /* translation procedure */
64 gregl 2.9 } cvts = { /* conversion structure */
65 greg 2.22 0, "", "", COMPRESSION_NONE, PHOTOMETRIC_RGB,
66 gregl 2.10 PLANARCONFIG_CONTIG, GAMCOR, 0, 1, 1., 1.,
67 gregl 2.9 };
68 greg 1.4
69 gregl 2.9 #define CHK(f) (cvts.flags & (f))
70     #define SET(f) (cvts.flags |= (f))
71     #define CLR(f) (cvts.flags &= ~(f))
72     #define TGL(f) (cvts.flags ^= (f))
73 greg 1.5
74 schorsch 2.28 static colcvf_t Luv2Color, L2Color, RGB2Colr, Gry2Colr;
75     static colcvf_t Color2Luv, Color2L, Colr2RGB, Colr2Gry;
76     static colcvf_t RRGGBB2Color, GGry2Color, Color2RRGGBB, Color2GGry;
77    
78     static gethfunc headline;
79     static void quiterr(char *err);
80     static void allocbufs(void);
81     static void initfromtif(void);
82     static void tiff2ra(int ac, char *av[]);
83     static void initfromrad(void);
84     static void ra2tiff(int ac, char *av[]);
85    
86    
87 greg 2.21
88     #define RfGfBf2Color Luv2Color
89     #define Gryf2Color L2Color
90     #define Color2Gryf Color2L
91     #define Color2RfGfBf Color2Luv
92 greg 1.1
93 gregl 2.9 short ortab[8] = { /* orientation conversion table */
94     YMAJOR|YDECR,
95     YMAJOR|YDECR|XDECR,
96     YMAJOR|XDECR,
97     YMAJOR,
98     YDECR,
99     XDECR|YDECR,
100     XDECR,
101     0
102     };
103 greg 1.1
104 gregl 2.9 #define pixorder() ortab[cvts.orient-1]
105    
106 greg 2.22 extern char TMSTR[]; /* "CAPDATE=" from header.c */
107     char OWNSTR[] = "OWNER=";
108    
109 greg 1.1 char *progname;
110    
111 schorsch 2.27
112 schorsch 2.28 int
113     main(int argc, char *argv[])
114 greg 1.1 {
115     int reverse = 0;
116     int i;
117    
118     progname = argv[0];
119    
120     for (i = 1; i < argc; i++)
121     if (argv[i][0] == '-')
122     switch (argv[i][1]) {
123 gregl 2.9 case 'g': /* gamma correction */
124     cvts.gamcor = atof(argv[++i]);
125 greg 1.1 break;
126 gregl 2.9 case 'x': /* XYZE Radiance output */
127     TGL(C_XYZE);
128 greg 1.4 break;
129 gregl 2.9 case 'z': /* LZW compressed output */
130     cvts.comp = COMPRESSION_LZW;
131 greg 1.5 break;
132 gregl 2.9 case 'L': /* LogLuv 32-bit output */
133 gregl 2.10 cvts.comp = COMPRESSION_SGILOG;
134     cvts.phot = PHOTOMETRIC_LOGLUV;
135 gregl 2.9 break;
136     case 'l': /* LogLuv 24-bit output */
137 gregl 2.10 cvts.comp = COMPRESSION_SGILOG24;
138     cvts.phot = PHOTOMETRIC_LOGLUV;
139 gregl 2.9 break;
140 greg 2.21 case 'w': /* 16-bit/primary output? */
141     TGL(C_TWRD);
142     break;
143     case 'f': /* IEEE float output? */
144     TGL(C_TFLT);
145     break;
146 gregl 2.9 case 'b': /* greyscale output? */
147     TGL(C_GRY);
148     break;
149     case 'e': /* exposure adjustment */
150 greg 1.1 if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
151     goto userr;
152 gregl 2.9 cvts.bradj = atoi(argv[++i]);
153 greg 1.1 break;
154 gregl 2.9 case 'r': /* reverse conversion? */
155 greg 1.1 reverse = !reverse;
156     break;
157     case '\0':
158     goto doneopts;
159     default:
160     goto userr;
161     }
162     else
163     break;
164     doneopts:
165 gregl 2.9 if (reverse) {
166 greg 1.1
167     if (i != argc-2 && i != argc-1)
168     goto userr;
169 gregl 2.9
170     tiff2ra(i, argv);
171    
172     } else {
173    
174 greg 1.1 if (i != argc-2)
175     goto userr;
176 greg 2.21 /* consistency checks */
177 schorsch 2.25 if (CHK(C_GRY)) {
178 gregl 2.10 if (cvts.phot == PHOTOMETRIC_RGB)
179     cvts.phot = PHOTOMETRIC_MINISBLACK;
180     else {
181     cvts.phot = PHOTOMETRIC_LOGL;
182     cvts.comp = COMPRESSION_SGILOG;
183     }
184 schorsch 2.25 }
185 greg 2.21 if (CHK(C_TWRD|C_TFLT) == (C_TWRD|C_TFLT))
186     goto userr;
187 gregl 2.9
188     ra2tiff(i, argv);
189     }
190    
191 greg 1.1 exit(0);
192     userr:
193 greg 1.4 fprintf(stderr,
194 greg 2.21 "Usage: %s [-z|-L|-l|-f|-w][-b][-e +/-stops][-g gamma] {in.pic|-} out.tif\n",
195 greg 1.1 progname);
196 gregl 2.9 fprintf(stderr,
197     " Or: %s -r [-x][-e +/-stops][-g gamma] in.tif [out.pic|-]\n",
198     progname);
199 greg 1.1 exit(1);
200     }
201    
202    
203 schorsch 2.28 static void
204     quiterr( /* print message and exit */
205     char *err
206     )
207 greg 1.1 {
208     if (err != NULL) {
209     fprintf(stderr, "%s: %s\n", progname, err);
210     exit(1);
211     }
212     exit(0);
213     }
214    
215    
216 schorsch 2.28 static void
217     allocbufs(void) /* allocate scanline buffers */
218 greg 1.1 {
219 gregl 2.9 int rsiz, tsiz;
220    
221     rsiz = CHK(C_RFLT) ? sizeof(COLOR) : sizeof(COLR);
222 gwlarson 2.19 tsiz = (CHK(C_TFLT) ? sizeof(float) :
223     CHK(C_TWRD) ? sizeof(uint16) : sizeof(uint8)) *
224 gregl 2.9 (CHK(C_GRY) ? 1 : 3);
225     cvts.r.p = (char *)malloc(rsiz*cvts.xmax);
226     cvts.t.p = (char *)malloc(tsiz*cvts.xmax);
227 schorsch 2.26 if ((cvts.r.p == NULL) | (cvts.t.p == NULL))
228 gregl 2.9 quiterr("no memory to allocate scanline buffers");
229     }
230    
231    
232 schorsch 2.28 static void
233     initfromtif(void) /* initialize conversion from TIFF input */
234 gregl 2.9 {
235     uint16 hi;
236 greg 2.22 char *cp;
237 gregl 2.9 float *fa, f1, f2;
238    
239 greg 2.21 CLR(C_GRY|C_GAMMA|C_PRIM|C_RFLT|C_TFLT|C_TWRD|C_CXFM);
240 gregl 2.9
241     TIFFGetFieldDefaulted(cvts.tif, TIFFTAG_PLANARCONFIG, &cvts.pconf);
242    
243     if (TIFFGetField(cvts.tif, TIFFTAG_PRIMARYCHROMATICITIES, &fa)) {
244     cvts.prims[RED][CIEX] = fa[0];
245     cvts.prims[RED][CIEY] = fa[1];
246     cvts.prims[GRN][CIEX] = fa[2];
247     cvts.prims[GRN][CIEY] = fa[3];
248     cvts.prims[BLU][CIEX] = fa[4];
249     cvts.prims[BLU][CIEY] = fa[5];
250     cvts.prims[WHT][CIEX] = 1./3.;
251     cvts.prims[WHT][CIEY] = 1./3.;
252     if (TIFFGetField(cvts.tif, TIFFTAG_WHITEPOINT, &fa)) {
253     cvts.prims[WHT][CIEX] = fa[0];
254     cvts.prims[WHT][CIEY] = fa[1];
255     }
256     SET(C_PRIM);
257     }
258    
259     if (!TIFFGetField(cvts.tif, TIFFTAG_COMPRESSION, &cvts.comp))
260     cvts.comp = COMPRESSION_NONE;
261    
262     if (TIFFGetField(cvts.tif, TIFFTAG_XRESOLUTION, &f1) &&
263     TIFFGetField(cvts.tif, TIFFTAG_YRESOLUTION, &f2))
264     cvts.pixrat = f1/f2;
265    
266 gregl 2.10 TIFFGetFieldDefaulted(cvts.tif, TIFFTAG_ORIENTATION, &cvts.orient);
267 gregl 2.9
268 gregl 2.10 if (!TIFFGetFieldDefaulted(cvts.tif, TIFFTAG_PHOTOMETRIC, &cvts.phot))
269     quiterr("TIFF has unspecified photometric type");
270    
271     switch (cvts.phot) {
272     case PHOTOMETRIC_LOGLUV:
273 gregl 2.9 SET(C_RFLT|C_TFLT);
274     if (!CHK(C_XYZE)) {
275     cpcolormat(cvts.cmat, xyz2rgbmat);
276     SET(C_CXFM|C_GAMUT);
277 gregl 2.10 } else if (cvts.comp == COMPRESSION_SGILOG)
278 greg 2.29 SET(C_GAMUT); /* may be outside XYZ gamut */
279 gregl 2.9 if (cvts.pconf != PLANARCONFIG_CONTIG)
280     quiterr("cannot handle separate Luv planes");
281 gregl 2.10 TIFFSetField(cvts.tif, TIFFTAG_SGILOGDATAFMT,
282 gregl 2.12 SGILOGDATAFMT_FLOAT);
283 gregl 2.9 cvts.tf = Luv2Color;
284     break;
285 gregl 2.10 case PHOTOMETRIC_LOGL:
286     SET(C_GRY|C_RFLT|C_TFLT|C_GAMUT);
287     cvts.pconf = PLANARCONFIG_CONTIG;
288     TIFFSetField(cvts.tif, TIFFTAG_SGILOGDATAFMT,
289 gregl 2.12 SGILOGDATAFMT_FLOAT);
290 gregl 2.10 cvts.tf = L2Color;
291     break;
292 gregl 2.11 case PHOTOMETRIC_YCBCR:
293     if (cvts.comp == COMPRESSION_JPEG &&
294     cvts.pconf == PLANARCONFIG_CONTIG) {
295     TIFFSetField(cvts.tif, TIFFTAG_JPEGCOLORMODE,
296     JPEGCOLORMODE_RGB);
297     cvts.phot = PHOTOMETRIC_RGB;
298     } else
299     quiterr("unsupported photometric type");
300     /* fall through */
301 gregl 2.10 case PHOTOMETRIC_RGB:
302 gwlarson 2.18 SET(C_GAMMA);
303 gregl 2.9 setcolrgam(cvts.gamcor);
304     if (CHK(C_XYZE)) {
305 greg 2.20 comprgb2xyzWBmat(cvts.cmat,
306 gregl 2.9 CHK(C_PRIM) ? cvts.prims : stdprims);
307     SET(C_CXFM);
308     }
309     if (!TIFFGetField(cvts.tif, TIFFTAG_SAMPLESPERPIXEL, &hi) ||
310 gregl 2.10 hi != 3)
311     quiterr("unsupported samples per pixel for RGB");
312 greg 2.21 if (!TIFFGetField(cvts.tif, TIFFTAG_BITSPERSAMPLE, &hi))
313     hi = -1;
314     switch (hi) {
315     case 8:
316 gwlarson 2.18 cvts.tf = RGB2Colr;
317 greg 2.21 break;
318     case 16:
319 gwlarson 2.18 cvts.tf = RRGGBB2Color;
320 gwlarson 2.19 SET(C_RFLT|C_TWRD);
321 greg 2.21 break;
322     case 32:
323     cvts.tf = RfGfBf2Color;
324     SET(C_RFLT|C_TFLT);
325     break;
326     default:
327     quiterr("unsupported bits per sample for RGB");
328 gwlarson 2.18 }
329 gregl 2.9 break;
330 gregl 2.10 case PHOTOMETRIC_MINISBLACK:
331 gwlarson 2.18 SET(C_GRY|C_GAMMA);
332 gregl 2.15 setcolrgam(cvts.gamcor);
333 gregl 2.10 cvts.pconf = PLANARCONFIG_CONTIG;
334     if (!TIFFGetField(cvts.tif, TIFFTAG_SAMPLESPERPIXEL, &hi) ||
335     hi != 1)
336     quiterr("unsupported samples per pixel for greyscale");
337 greg 2.21 if (!TIFFGetField(cvts.tif, TIFFTAG_BITSPERSAMPLE, &hi))
338     hi = -1;
339     switch (hi) {
340     case 8:
341 gwlarson 2.18 cvts.tf = Gry2Colr;
342 greg 2.21 break;
343     case 16:
344 gwlarson 2.18 cvts.tf = GGry2Color;
345 gwlarson 2.19 SET(C_RFLT|C_TWRD);
346 greg 2.21 break;
347     case 32:
348     cvts.tf = Gryf2Color;
349     SET(C_RFLT|C_TFLT);
350     break;
351     default:
352     quiterr("unsupported bits per sample for Gray");
353 gwlarson 2.18 }
354 gregl 2.10 break;
355     default:
356     quiterr("unsupported photometric type");
357     break;
358 gregl 2.9 }
359    
360     if (!TIFFGetField(cvts.tif, TIFFTAG_IMAGEWIDTH, &cvts.xmax) ||
361     !TIFFGetField(cvts.tif, TIFFTAG_IMAGELENGTH, &cvts.ymax))
362 greg 1.1 quiterr("unknown input image resolution");
363 gregl 2.9
364     if (!TIFFGetField(cvts.tif, TIFFTAG_STONITS, &cvts.stonits))
365     cvts.stonits = 1.;
366 greg 2.22
367     if (!TIFFGetField(cvts.tif, TIFFTAG_DATETIME, &cp))
368     cvts.capdate[0] = '\0';
369     else {
370     strncpy(cvts.capdate, cp, 19);
371     cvts.capdate[19] = '\0';
372     }
373     if (!TIFFGetField(cvts.tif, TIFFTAG_ARTIST, &cp))
374     cvts.owner[0] = '\0';
375     else {
376     strncpy(cvts.owner, cp, sizeof(cvts.owner));
377     cvts.owner[sizeof(cvts.owner)-1] = '\0';
378     }
379 gregl 2.9 /* add to Radiance header */
380     if (cvts.pixrat < .99 || cvts.pixrat > 1.01)
381     fputaspect(cvts.pixrat, cvts.rfp);
382     if (CHK(C_XYZE)) {
383     fputexpos(pow(2.,(double)cvts.bradj)/cvts.stonits, cvts.rfp);
384     fputformat(CIEFMT, cvts.rfp);
385     } else {
386     if (CHK(C_PRIM))
387     fputprims(cvts.prims, cvts.rfp);
388     fputexpos(WHTEFFICACY*pow(2.,(double)cvts.bradj)/cvts.stonits,
389     cvts.rfp);
390     fputformat(COLRFMT, cvts.rfp);
391     }
392 greg 2.22 if (cvts.capdate[0])
393     fprintf(cvts.rfp, "%s %s\n", TMSTR, cvts.capdate);
394     if (cvts.owner[0])
395     fprintf(cvts.rfp, "%s %s\n", OWNSTR, cvts.owner);
396 gregl 2.9
397     allocbufs(); /* allocate scanline buffers */
398     }
399    
400    
401 schorsch 2.28 static void
402     tiff2ra( /* convert TIFF image to Radiance picture */
403     int ac,
404     char *av[]
405     )
406 gregl 2.9 {
407     int32 y;
408     /* open TIFF input */
409     if ((cvts.tif = TIFFOpen(av[ac], "r")) == NULL)
410     quiterr("cannot open TIFF input");
411     /* open Radiance output */
412     if (av[ac+1] == NULL || !strcmp(av[ac+1], "-"))
413     cvts.rfp = stdout;
414     else if ((cvts.rfp = fopen(av[ac+1], "w")) == NULL)
415     quiterr("cannot open Radiance output picture");
416     /* start output header */
417     newheader("RADIANCE", cvts.rfp);
418     printargs(ac, av, cvts.rfp);
419    
420     initfromtif(); /* initialize conversion */
421    
422     fputc('\n', cvts.rfp); /* finish Radiance header */
423     fputresolu(pixorder(), (int)cvts.xmax, (int)cvts.ymax, cvts.rfp);
424    
425     for (y = 0; y < cvts.ymax; y++) /* convert image */
426     (*cvts.tf)(y);
427     /* clean up */
428     fclose(cvts.rfp);
429     TIFFClose(cvts.tif);
430     }
431    
432    
433 schorsch 2.27 static int
434     headline( /* process Radiance input header line */
435     char *s,
436     void *p
437     )
438 gregl 2.9 {
439 greg 2.22 static int tmstrlen = 0;
440     static int ownstrlen = 0;
441 gregl 2.9 char fmt[32];
442    
443 greg 2.22 if (!tmstrlen)
444     tmstrlen = strlen(TMSTR);
445     if (!ownstrlen)
446     ownstrlen = strlen(OWNSTR);
447 gregl 2.9 if (formatval(fmt, s)) {
448     if (!strcmp(fmt, COLRFMT))
449     CLR(C_XYZE);
450     else if (!strcmp(fmt, CIEFMT))
451     SET(C_XYZE);
452     else
453     quiterr("unrecognized input picture format");
454 gwlarson 2.17 return(1);
455 gregl 2.9 }
456     if (isexpos(s)) {
457     cvts.stonits /= exposval(s);
458 gwlarson 2.17 return(1);
459 gregl 2.9 }
460     if (isaspect(s)) {
461     cvts.pixrat *= aspectval(s);
462 gwlarson 2.17 return(1);
463 gregl 2.9 }
464     if (isprims(s)) {
465     primsval(cvts.prims, s);
466     SET(C_PRIM);
467 gwlarson 2.17 return(1);
468 gregl 2.9 }
469 greg 2.22 if (isdate(s)) {
470     if (s[tmstrlen] == ' ')
471     strncpy(cvts.capdate, s+tmstrlen+1, 19);
472     else
473     strncpy(cvts.capdate, s+tmstrlen, 19);
474     cvts.capdate[19] = '\0';
475     return(1);
476     }
477     if (!strncmp(s, OWNSTR, ownstrlen)) {
478     register char *cp = s + ownstrlen;
479    
480     while (isspace(*cp))
481     ++cp;
482     strncpy(cvts.owner, cp, sizeof(cvts.owner));
483     cvts.owner[sizeof(cvts.owner)-1] = '\0';
484     for (cp = cvts.owner; *cp; cp++)
485     ;
486     while (cp > cvts.owner && isspace(cp[-1]))
487     *--cp = '\0';
488     return(1);
489     }
490 gwlarson 2.17 return(0);
491 gregl 2.9 }
492    
493    
494 schorsch 2.28 static void
495     initfromrad(void) /* initialize input from a Radiance picture */
496 gregl 2.9 {
497     int i1, i2, po;
498     /* read Radiance header */
499 greg 2.21 CLR(C_RFLT|C_XYZE|C_PRIM|C_GAMMA|C_CXFM);
500 greg 2.22 cvts.capdate[0] = '\0';
501     cvts.owner[0] = '\0';
502 gregl 2.9 cvts.stonits = 1.;
503     cvts.pixrat = 1.;
504     cvts.pconf = PLANARCONFIG_CONTIG;
505     getheader(cvts.rfp, headline, NULL);
506     if ((po = fgetresolu(&i1, &i2, cvts.rfp)) < 0)
507     quiterr("bad Radiance picture");
508     cvts.xmax = i1; cvts.ymax = i2;
509     for (i1 = 0; i1 < 8; i1++) /* interpret orientation */
510     if (ortab[i1] == po) {
511     cvts.orient = i1 + 1;
512     break;
513 greg 1.1 }
514 gregl 2.9 if (i1 >= 8)
515     quiterr("internal error 1 in initfromrad");
516     if (!(po & YMAJOR))
517     cvts.pixrat = 1./cvts.pixrat;
518     if (!CHK(C_XYZE))
519     cvts.stonits *= WHTEFFICACY;
520     /* set up conversion */
521     TIFFSetField(cvts.tif, TIFFTAG_COMPRESSION, cvts.comp);
522 gregl 2.10 TIFFSetField(cvts.tif, TIFFTAG_PHOTOMETRIC, cvts.phot);
523 gregl 2.9
524 gregl 2.10 switch (cvts.phot) {
525     case PHOTOMETRIC_LOGLUV:
526 gregl 2.9 SET(C_RFLT|C_TFLT);
527 greg 2.21 CLR(C_GRY|C_TWRD);
528 gregl 2.9 if (!CHK(C_XYZE)) {
529 greg 2.20 comprgb2xyzWBmat(cvts.cmat,
530     CHK(C_PRIM) ? cvts.prims : stdprims);
531 gregl 2.9 SET(C_CXFM);
532     }
533 gregl 2.10 if (cvts.comp != COMPRESSION_SGILOG &&
534     cvts.comp != COMPRESSION_SGILOG24)
535     quiterr("internal error 2 in initfromrad");
536     TIFFSetField(cvts.tif, TIFFTAG_SGILOGDATAFMT,
537 gregl 2.12 SGILOGDATAFMT_FLOAT);
538 gregl 2.9 cvts.tf = Color2Luv;
539     break;
540 gregl 2.10 case PHOTOMETRIC_LOGL:
541     SET(C_GRY|C_RFLT|C_TFLT);
542 greg 2.21 CLR(C_TWRD);
543 gregl 2.10 if (cvts.comp != COMPRESSION_SGILOG)
544     quiterr("internal error 3 in initfromrad");
545     TIFFSetField(cvts.tif, TIFFTAG_SGILOGDATAFMT,
546 gregl 2.12 SGILOGDATAFMT_FLOAT);
547 gregl 2.10 cvts.tf = Color2L;
548     break;
549     case PHOTOMETRIC_RGB:
550 gregl 2.9 SET(C_GAMMA|C_GAMUT);
551 gregl 2.10 CLR(C_GRY);
552 gregl 2.9 setcolrgam(cvts.gamcor);
553     if (CHK(C_XYZE)) {
554 greg 2.20 compxyz2rgbWBmat(cvts.cmat,
555 gregl 2.9 CHK(C_PRIM) ? cvts.prims : stdprims);
556     SET(C_CXFM);
557     }
558     if (CHK(C_PRIM)) {
559     TIFFSetField(cvts.tif, TIFFTAG_PRIMARYCHROMATICITIES,
560     (float *)cvts.prims);
561     TIFFSetField(cvts.tif, TIFFTAG_WHITEPOINT,
562     (float *)cvts.prims[WHT]);
563     }
564 greg 2.21 if (CHK(C_TWRD)) {
565     cvts.tf = Color2RRGGBB;
566     SET(C_RFLT);
567     } else if (CHK(C_TFLT)) {
568 greg 2.23 TIFFSetField(cvts.tif, TIFFTAG_SAMPLEFORMAT,
569     SAMPLEFORMAT_IEEEFP);
570 greg 2.21 cvts.tf = Color2RfGfBf;
571     SET(C_RFLT);
572 greg 2.29 CLR(C_GAMUT);
573 greg 2.21 } else
574     cvts.tf = Colr2RGB;
575 gregl 2.9 break;
576 gregl 2.10 case PHOTOMETRIC_MINISBLACK:
577     SET(C_GRY|C_GAMMA|C_GAMUT);
578     setcolrgam(cvts.gamcor);
579 greg 2.21 if (CHK(C_TWRD)) {
580     cvts.tf = Color2GGry;
581     SET(C_RFLT);
582     } else if (CHK(C_TFLT)) {
583 greg 2.23 TIFFSetField(cvts.tif, TIFFTAG_SAMPLEFORMAT,
584     SAMPLEFORMAT_IEEEFP);
585 greg 2.21 cvts.tf = Color2Gryf;
586     SET(C_RFLT);
587     } else
588     cvts.tf = Colr2Gry;
589 gregl 2.10 break;
590     default:
591     quiterr("internal error 4 in initfromrad");
592     break;
593 greg 1.1 }
594 gregl 2.9 /* set other TIFF fields */
595     TIFFSetField(cvts.tif, TIFFTAG_IMAGEWIDTH, cvts.xmax);
596     TIFFSetField(cvts.tif, TIFFTAG_IMAGELENGTH, cvts.ymax);
597     TIFFSetField(cvts.tif, TIFFTAG_SAMPLESPERPIXEL, CHK(C_GRY) ? 1 : 3);
598 greg 2.21 TIFFSetField(cvts.tif, TIFFTAG_BITSPERSAMPLE,
599     CHK(C_TFLT) ? 32 : CHK(C_TWRD) ? 16 : 8);
600 gregl 2.9 TIFFSetField(cvts.tif, TIFFTAG_XRESOLUTION, 72.);
601     TIFFSetField(cvts.tif, TIFFTAG_YRESOLUTION, 72./cvts.pixrat);
602     TIFFSetField(cvts.tif, TIFFTAG_ORIENTATION, cvts.orient);
603     TIFFSetField(cvts.tif, TIFFTAG_RESOLUTIONUNIT, 2);
604     TIFFSetField(cvts.tif, TIFFTAG_PLANARCONFIG, cvts.pconf);
605     TIFFSetField(cvts.tif, TIFFTAG_STONITS,
606     cvts.stonits/pow(2.,(double)cvts.bradj));
607 greg 2.22 if (cvts.capdate[0])
608     TIFFSetField(cvts.tif, TIFFTAG_DATETIME, cvts.capdate);
609     if (cvts.owner[0])
610     TIFFSetField(cvts.tif, TIFFTAG_ARTIST, cvts.owner);
611 gregl 2.10 if (cvts.comp == COMPRESSION_NONE)
612     i1 = TIFFScanlineSize(cvts.tif);
613     else
614     i1 = 3*cvts.xmax; /* conservative guess */
615 gregl 2.9 i2 = 8192/i1; /* compute good strip size */
616     if (i2 < 1) i2 = 1;
617     TIFFSetField(cvts.tif, TIFFTAG_ROWSPERSTRIP, (uint32)i2);
618    
619     allocbufs(); /* allocate scanline buffers */
620     }
621    
622    
623 schorsch 2.28 static void
624     ra2tiff( /* convert Radiance picture to TIFF image */
625     int ac,
626     char *av[]
627     )
628 gregl 2.9 {
629     uint32 y;
630     /* open Radiance file */
631     if (!strcmp(av[ac], "-"))
632     cvts.rfp = stdin;
633     else if ((cvts.rfp = fopen(av[ac], "r")) == NULL)
634     quiterr("cannot open Radiance input picture");
635     /* open TIFF file */
636     if ((cvts.tif = TIFFOpen(av[ac+1], "w")) == NULL)
637     quiterr("cannot open TIFF output");
638    
639     initfromrad(); /* initialize conversion */
640    
641     for (y = 0; y < cvts.ymax; y++) /* convert image */
642     (*cvts.tf)(y);
643 greg 1.1 /* clean up */
644 gregl 2.9 TIFFClose(cvts.tif);
645     fclose(cvts.rfp);
646     }
647    
648    
649 schorsch 2.28 static void
650     Luv2Color( /* read/convert/write Luv->COLOR scanline */
651     uint32 y
652     )
653 gregl 2.9 {
654     register int x;
655    
656 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY) != (C_RFLT|C_TFLT))
657 gregl 2.9 quiterr("internal error 1 in Luv2Color");
658    
659 greg 2.31 if (cvts.pconf != PLANARCONFIG_CONTIG)
660     quiterr("cannot handle separate 32-bit color planes");
661    
662 gregl 2.9 if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
663     quiterr("error reading TIFF input");
664 greg 2.21 /* also works for float RGB */
665 gregl 2.9 for (x = cvts.xmax; x--; ) {
666 greg 2.21 setcolor(cvts.r.colors[x],
667     cvts.t.fp[3*x],
668     cvts.t.fp[3*x + 1],
669     cvts.t.fp[3*x + 2]);
670 gregl 2.9 if (CHK(C_CXFM))
671     colortrans(cvts.r.colors[x], cvts.cmat,
672     cvts.r.colors[x]);
673     if (CHK(C_GAMUT))
674     clipgamut(cvts.r.colors[x], cvts.t.fp[3*x + 1],
675     CGAMUT_LOWER, cblack, cwhite);
676     }
677     if (cvts.bradj) {
678     double m = pow(2.,(double)cvts.bradj);
679     for (x = cvts.xmax; x--; )
680     scalecolor(cvts.r.colors[x], m);
681     }
682    
683     if (fwritescan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
684     quiterr("error writing Radiance picture");
685     }
686    
687    
688 schorsch 2.28 static void
689     RRGGBB2Color( /* read/convert/write RGB16->COLOR scanline */
690     uint32 y
691     )
692 gwlarson 2.18 {
693 schorsch 2.26 int dogamma = (cvts.gamcor < 0.99) | (cvts.gamcor > 1.01);
694 gwlarson 2.18 register double d;
695     register int x;
696    
697 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY) != (C_TWRD|C_RFLT))
698 gwlarson 2.18 quiterr("internal error 1 in RRGGBB2Color");
699    
700 greg 2.31 if (cvts.pconf != PLANARCONFIG_CONTIG)
701     quiterr("cannot handle separate 16-bit color planes");
702    
703 gwlarson 2.18 if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
704     quiterr("error reading TIFF input");
705    
706     for (x = cvts.xmax; x--; ) {
707     d = (cvts.t.wp[3*x] + 0.5)*(1./(1L<<16));
708     if (dogamma) d = pow(d, cvts.gamcor);
709     colval(cvts.r.colors[x],RED) = d;
710     d = (cvts.t.wp[3*x + 1] + 0.5)*(1./(1L<<16));
711     if (dogamma) d = pow(d, cvts.gamcor);
712     colval(cvts.r.colors[x],GRN) = d;
713     d = (cvts.t.wp[3*x + 2] + 0.5)*(1./(1L<<16));
714     if (dogamma) d = pow(d, cvts.gamcor);
715     colval(cvts.r.colors[x],BLU) = d;
716     if (CHK(C_CXFM))
717     colortrans(cvts.r.colors[x], cvts.cmat,
718     cvts.r.colors[x]);
719     }
720     if (cvts.bradj) {
721     d = pow(2.,(double)cvts.bradj);
722     for (x = cvts.xmax; x--; )
723     scalecolor(cvts.r.colors[x], d);
724     }
725    
726     if (fwritescan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
727     quiterr("error writing Radiance picture");
728     }
729    
730    
731 schorsch 2.28 static void
732     L2Color( /* read/convert/write Lfloat->COLOR scanline */
733     uint32 y
734     )
735 gregl 2.9 {
736 greg 2.21 float m = pow(2., (double)cvts.bradj);
737 gregl 2.9 register int x;
738    
739 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY) != (C_RFLT|C_TFLT|C_GRY))
740 gregl 2.9 quiterr("internal error 1 in L2Color");
741    
742     if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
743     quiterr("error reading TIFF input");
744 greg 2.21 /* also works for float greyscale */
745     for (x = cvts.xmax; x--; ) {
746     register float f = cvts.t.fp[x];
747     if (cvts.bradj) f *= m;
748     setcolor(cvts.r.colors[x], f, f, f);
749     }
750 gregl 2.9 if (fwritescan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
751     quiterr("error writing Radiance picture");
752     }
753    
754    
755 schorsch 2.28 static void
756     RGB2Colr( /* read/convert/write RGB->COLR scanline */
757     uint32 y
758     )
759 gregl 2.9 {
760     COLOR ctmp;
761     register int x;
762    
763 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY))
764 gregl 2.9 quiterr("internal error 1 in RGB2Colr");
765    
766     if (cvts.pconf == PLANARCONFIG_CONTIG) {
767     if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
768     goto readerr;
769     for (x = cvts.xmax; x--; ) {
770     cvts.r.colrs[x][RED] = cvts.t.bp[3*x];
771     cvts.r.colrs[x][GRN] = cvts.t.bp[3*x + 1];
772     cvts.r.colrs[x][BLU] = cvts.t.bp[3*x + 2];
773     }
774     } else {
775     if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
776     goto readerr;
777     if (TIFFReadScanline(cvts.tif,
778 gregl 2.14 (tdata_t)(cvts.t.bp + cvts.xmax), y, 1) < 0)
779 gregl 2.9 goto readerr;
780     if (TIFFReadScanline(cvts.tif,
781 gregl 2.14 (tdata_t)(cvts.t.bp + 2*cvts.xmax), y, 2) < 0)
782 gregl 2.9 goto readerr;
783     for (x = cvts.xmax; x--; ) {
784     cvts.r.colrs[x][RED] = cvts.t.bp[x];
785     cvts.r.colrs[x][GRN] = cvts.t.bp[cvts.xmax + x];
786     cvts.r.colrs[x][BLU] = cvts.t.bp[2*cvts.xmax + x];
787     }
788     }
789    
790     gambs_colrs(cvts.r.colrs, cvts.xmax);
791     if (CHK(C_CXFM))
792     for (x = cvts.xmax; x--; ) {
793     colr_color(ctmp, cvts.r.colrs[x]);
794     colortrans(ctmp, cvts.cmat, ctmp);
795     if (CHK(C_GAMUT)) /* !CHK(C_XYZE) */
796     clipgamut(ctmp, bright(ctmp), CGAMUT_LOWER,
797     cblack, cwhite);
798     setcolr(cvts.r.colrs[x], colval(ctmp,RED),
799     colval(ctmp,GRN), colval(ctmp,BLU));
800     }
801     if (cvts.bradj)
802     shiftcolrs(cvts.r.colrs, cvts.xmax, cvts.bradj);
803    
804     if (fwritecolrs(cvts.r.colrs, cvts.xmax, cvts.rfp) < 0)
805     quiterr("error writing Radiance picture");
806 greg 1.1 return;
807     readerr:
808     quiterr("error reading TIFF input");
809     }
810    
811    
812 schorsch 2.28 static void
813     Gry2Colr( /* read/convert/write G8->COLR scanline */
814     uint32 y
815     )
816 greg 1.1 {
817     register int x;
818 gregl 2.9
819 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY) != C_GRY)
820 gregl 2.9 quiterr("internal error 1 in Gry2Colr");
821    
822     if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
823     quiterr("error reading TIFF input");
824    
825     for (x = cvts.xmax; x--; )
826     cvts.r.colrs[x][RED] =
827     cvts.r.colrs[x][GRN] =
828     cvts.r.colrs[x][BLU] = cvts.t.bp[x];
829    
830     gambs_colrs(cvts.r.colrs, cvts.xmax);
831     if (cvts.bradj)
832     shiftcolrs(cvts.r.colrs, cvts.xmax, cvts.bradj);
833    
834     if (fwritecolrs(cvts.r.colrs, cvts.xmax, cvts.rfp) < 0)
835     quiterr("error writing Radiance picture");
836     }
837    
838    
839 schorsch 2.28 static void
840     GGry2Color( /* read/convert/write G16->COLOR scanline */
841     uint32 y
842     )
843 gwlarson 2.18 {
844 schorsch 2.26 int dogamma = (cvts.gamcor < 0.99) | (cvts.gamcor > 1.01);
845 gwlarson 2.18 double m;
846     register double d;
847     register int x;
848    
849 gwlarson 2.19 if (CHK(C_TFLT|C_TWRD|C_GRY|C_RFLT) != (C_GRY|C_RFLT|C_TWRD))
850 gwlarson 2.18 quiterr("internal error 1 in GGry2Color");
851    
852     if (TIFFReadScanline(cvts.tif, cvts.t.p, y, 0) < 0)
853     quiterr("error reading TIFF input");
854    
855     if (cvts.bradj)
856     m = pow(2., (double)cvts.bradj);
857     for (x = cvts.xmax; x--; ) {
858     d = (cvts.t.wp[x] + 0.5)*(1./(1L<<16));
859     if (dogamma) d = pow(d, cvts.gamcor);
860     if (cvts.bradj) d *= m;
861     colval(cvts.r.colors[x],RED) =
862     colval(cvts.r.colors[x],GRN) =
863     colval(cvts.r.colors[x],BLU) = d;
864     }
865     if (fwritescan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
866     quiterr("error writing Radiance picture");
867     }
868    
869    
870 schorsch 2.28 static void
871     Color2GGry( /* read/convert/write COLOR->G16 scanline */
872     uint32 y
873     )
874 greg 2.21 {
875 schorsch 2.26 int dogamma = (cvts.gamcor < 0.99) | (cvts.gamcor > 1.01);
876 greg 2.21 float m = pow(2.,(double)cvts.bradj);
877     register int x;
878    
879     if (CHK(C_RFLT|C_TFLT|C_TWRD|C_GRY) != (C_RFLT|C_TWRD|C_GRY))
880     quiterr("internal error 1 in Color2GGry");
881    
882     if (freadscan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
883     quiterr("error reading Radiance picture");
884    
885     for (x = cvts.xmax; x--; ) {
886     register float f = m*( CHK(C_XYZE) ?
887     colval(cvts.r.colors[x],CIEY)
888     : bright(cvts.r.colors[x]) );
889     if (f <= 0)
890     cvts.t.wp[x] = 0;
891     else if (f >= 1)
892     cvts.t.wp[x] = 0xffff;
893     else if (dogamma)
894     cvts.t.wp[x] = (int)((float)(1L<<16) *
895     pow(f, 1./cvts.gamcor));
896     else
897     cvts.t.wp[x] = (int)((float)(1L<<16) * f);
898     }
899    
900     if (TIFFWriteScanline(cvts.tif, cvts.t.p, y, 0) < 0)
901     quiterr("error writing TIFF output");
902     }
903    
904    
905 schorsch 2.28 static void
906     Color2L( /* read/convert/write COLOR->Lfloat scanline */
907     uint32 y
908     )
909 gregl 2.9 {
910 greg 2.21 float m = pow(2.,(double)cvts.bradj);
911 gregl 2.9 register int x;
912    
913 gwlarson 2.19 if (CHK(C_RFLT|C_TFLT|C_TWRD|C_GRY) != (C_RFLT|C_TFLT|C_GRY))
914 gregl 2.9 quiterr("internal error 1 in Color2L");
915    
916     if (freadscan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
917     quiterr("error reading Radiance picture");
918    
919     for (x = cvts.xmax; x--; )
920     cvts.t.fp[x] = m*( CHK(C_XYZE) ? colval(cvts.r.colors[x],CIEY)
921     : bright(cvts.r.colors[x]) );
922    
923     if (TIFFWriteScanline(cvts.tif, cvts.t.p, y, 0) < 0)
924     quiterr("error writing TIFF output");
925     }
926    
927    
928 schorsch 2.28 static void
929     Color2Luv( /* read/convert/write COLOR->Luv scanline */
930     uint32 y
931     )
932 gregl 2.9 {
933     register int x;
934    
935 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY) != (C_RFLT|C_TFLT))
936 gregl 2.9 quiterr("internal error 1 in Color2Luv");
937    
938     if (freadscan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
939     quiterr("error reading Radiance picture");
940    
941     if (CHK(C_CXFM))
942     for (x = cvts.xmax; x--; )
943     colortrans(cvts.r.colors[x], cvts.cmat,
944     cvts.r.colors[x]);
945     if (cvts.bradj) {
946     double m = pow(2.,(double)cvts.bradj);
947     for (x = cvts.xmax; x--; )
948     scalecolor(cvts.r.colors[x], m);
949     }
950 greg 2.21 /* also works for float RGB */
951 gregl 2.9 for (x = cvts.xmax; x--; ) {
952 gwlarson 2.16 cvts.t.fp[3*x] = colval(cvts.r.colors[x],CIEX);
953     cvts.t.fp[3*x+1] = colval(cvts.r.colors[x],CIEY);
954     cvts.t.fp[3*x+2] = colval(cvts.r.colors[x],CIEZ);
955 gregl 2.9 }
956    
957     if (TIFFWriteScanline(cvts.tif, cvts.t.p, y, 0) < 0)
958     quiterr("error writing TIFF output");
959     }
960    
961    
962 schorsch 2.28 static void
963     Color2RRGGBB( /* read/convert/write COLOR->RGB16 scanline */
964     uint32 y
965     )
966 greg 2.21 {
967 schorsch 2.26 int dogamma = (cvts.gamcor < 0.99) | (cvts.gamcor > 1.01);
968 greg 2.21 float m = pow(2.,(double)cvts.bradj);
969     register int x, i;
970    
971     if (CHK(C_RFLT|C_TFLT|C_TWRD|C_GRY) != (C_RFLT|C_TWRD))
972     quiterr("internal error 1 in Color2RRGGBB");
973    
974     if (freadscan(cvts.r.colors, cvts.xmax, cvts.rfp) < 0)
975     quiterr("error reading Radiance picture");
976    
977 greg 2.29 for (x = cvts.xmax; x--; ) {
978     if (CHK(C_CXFM)) {
979     colortrans(cvts.r.colors[x], cvts.cmat,
980     cvts.r.colors[x]);
981     if (CHK(C_GAMUT))
982 greg 2.30 clipgamut(cvts.r.colors[x], bright(cvts.r.colors[x]),
983 greg 2.29 CGAMUT_LOWER, cblack, cwhite);
984     }
985 greg 2.21 for (i = 3; i--; ) {
986     register float f = m*colval(cvts.r.colors[x],i);
987     if (f <= 0)
988     cvts.t.wp[3*x + i] = 0;
989     else if (f >= 1)
990     cvts.t.wp[3*x + i] = 0xffff;
991     else if (dogamma)
992     cvts.t.wp[3*x + i] = (int)((float)(1L<<16) *
993     pow(f, 1./cvts.gamcor));
994     else
995     cvts.t.wp[3*x + i] = (int)((float)(1L<<16)*f);
996     }
997 greg 2.29 }
998 greg 2.21
999     if (TIFFWriteScanline(cvts.tif, cvts.t.p, y, 0) < 0)
1000     quiterr("error writing TIFF output");
1001     }
1002    
1003    
1004 schorsch 2.28 static void
1005     Colr2Gry( /* read/convert/write COLR->RGB scanline */
1006     uint32 y
1007     )
1008 gregl 2.9 {
1009     register int x;
1010    
1011 gwlarson 2.19 if (CHK(C_RFLT|C_TWRD|C_TFLT|C_GRY) != C_GRY)
1012 gregl 2.9 quiterr("internal error 1 in Colr2Gry");
1013    
1014     if (freadcolrs(cvts.r.colrs, cvts.xmax, cvts.rfp) < 0)
1015     quiterr("error reading Radiance picture");
1016    
1017     if (cvts.bradj)
1018     shiftcolrs(cvts.r.colrs, cvts.xmax, cvts.bradj);
1019     for (x = cvts.xmax; x--; )
1020     colval(cvts.r.colrs[x],CIEY) = normbright(cvts.r.colrs[x]);
1021     colrs_gambs(cvts.r.colrs, cvts.xmax);
1022    
1023     for (x = cvts.xmax; x--; )
1024     cvts.t.bp[x] = colval(cvts.r.colrs[x],CIEY);
1025    
1026     if (TIFFWriteScanline(cvts.tif, cvts.t.p, y, 0) < 0)
1027     quiterr("error writing TIFF output");
1028     }
1029    
1030    
1031 schorsch 2.28 static void
1032     Colr2RGB( /* read/convert/write COLR->RGB scanline */
1033     uint32 y
1034     )
1035 gregl 2.9 {
1036     COLOR ctmp;
1037     register int x;
1038    
1039 gwlarson 2.19 if (CHK(C_RFLT|C_TFLT|C_TWRD|C_GRY))
1040 gregl 2.9 quiterr("internal error 1 in Colr2RGB");
1041    
1042     if (freadcolrs(cvts.r.colrs, cvts.xmax, cvts.rfp) < 0)
1043     quiterr("error reading Radiance picture");
1044    
1045     if (cvts.bradj)
1046     shiftcolrs(cvts.r.colrs, cvts.xmax, cvts.bradj);
1047     if (CHK(C_CXFM))
1048     for (x = cvts.xmax; x--; ) {
1049     colr_color(ctmp, cvts.r.colrs[x]);
1050     colortrans(ctmp, cvts.cmat, ctmp);
1051     if (CHK(C_GAMUT))
1052     clipgamut(ctmp, bright(ctmp), CGAMUT,
1053     cblack, cwhite);
1054     setcolr(cvts.r.colrs[x], colval(ctmp,RED),
1055     colval(ctmp,GRN), colval(ctmp,BLU));
1056 greg 1.1 }
1057 gregl 2.9 colrs_gambs(cvts.r.colrs, cvts.xmax);
1058    
1059     for (x = cvts.xmax; x--; ) {
1060     cvts.t.bp[3*x] = cvts.r.colrs[x][RED];
1061     cvts.t.bp[3*x+1] = cvts.r.colrs[x][GRN];
1062     cvts.t.bp[3*x+2] = cvts.r.colrs[x][BLU];
1063 greg 1.1 }
1064 gregl 2.9
1065     if (TIFFWriteScanline(cvts.tif, cvts.t.p, y, 0) < 0)
1066     quiterr("error writing TIFF output");
1067 greg 1.1 }