1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: tmapcolrs.c,v 3.12 2003/06/20 00:25:49 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* Routines for tone mapping on Radiance RGBE and XYZE pictures. |
6 |
* |
7 |
* Externals declared in tonemap.h |
8 |
*/ |
9 |
|
10 |
#include "copyright.h" |
11 |
|
12 |
#include <stdio.h> |
13 |
#include <string.h> |
14 |
#include <math.h> |
15 |
#include <time.h> |
16 |
#include "tmprivat.h" |
17 |
#include "resolu.h" |
18 |
|
19 |
#ifndef TM_PIC_CTRANS |
20 |
#define TM_PIC_CTRANS 1 /* transform colors? (expensive) */ |
21 |
#endif |
22 |
|
23 |
#define GAMTSZ 1024 |
24 |
|
25 |
typedef struct { |
26 |
BYTE gamb[GAMTSZ]; /* gamma lookup table */ |
27 |
COLR clfb; /* encoded tm->clf */ |
28 |
TMbright inpsfb; /* encoded tm->inpsf */ |
29 |
} COLRDATA; |
30 |
|
31 |
#ifdef NOPROTO |
32 |
static MEM_PTR colrInit(); |
33 |
static void colrNewSpace(); |
34 |
#else |
35 |
static MEM_PTR colrInit(struct tmStruct *); |
36 |
static void colrNewSpace(struct tmStruct *); |
37 |
#endif |
38 |
static struct tmPackage colrPkg = { /* our package functions */ |
39 |
colrInit, colrNewSpace, free |
40 |
}; |
41 |
static int colrReg = -1; /* our package registration number */ |
42 |
|
43 |
#define LOGISZ 260 |
44 |
static TMbright logi[LOGISZ]; |
45 |
|
46 |
|
47 |
int |
48 |
tmCvColrs(ls, cs, scan, len) /* convert RGBE/XYZE colors */ |
49 |
TMbright *ls; |
50 |
BYTE *cs; |
51 |
COLR *scan; |
52 |
int len; |
53 |
{ |
54 |
static char funcName[] = "tmCvColrs"; |
55 |
COLR cmon; |
56 |
register COLRDATA *cd; |
57 |
register int i, bi, li; |
58 |
|
59 |
if (tmTop == NULL) |
60 |
returnErr(TM_E_TMINVAL); |
61 |
if (ls == NULL | scan == NULL | len < 0) |
62 |
returnErr(TM_E_ILLEGAL); |
63 |
#if TM_PIC_CTRANS |
64 |
if (tmNeedMatrix(tmTop)) { /* need floating point */ |
65 |
#else |
66 |
if (tmTop->inppri == TM_XYZPRIM) { /* no way around this */ |
67 |
#endif |
68 |
register COLOR *newscan; |
69 |
newscan = (COLOR *)tempbuffer(len*sizeof(COLOR)); |
70 |
if (newscan == NULL) |
71 |
returnErr(TM_E_NOMEM); |
72 |
for (i = len; i--; ) |
73 |
colr_color(newscan[i], scan[i]); |
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return(tmCvColors(ls, cs, newscan, len)); |
75 |
} |
76 |
if (colrReg < 0) { /* build tables if necessary */ |
77 |
colrReg = tmRegPkg(&colrPkg); |
78 |
if (colrReg < 0) |
79 |
returnErr(TM_E_CODERR1); |
80 |
for (i = 256; i--; ) |
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logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5; |
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for (i = 256; i < LOGISZ; i++) |
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logi[i] = 0; |
84 |
tmMkMesofact(); |
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} |
86 |
if ((cd = (COLRDATA *)tmPkgData(tmTop,colrReg)) == NULL) |
87 |
returnErr(TM_E_NOMEM); |
88 |
for (i = len; i--; ) { |
89 |
copycolr(cmon, scan[i]); |
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/* world luminance */ |
91 |
li = ( cd->clfb[RED]*cmon[RED] + |
92 |
cd->clfb[GRN]*cmon[GRN] + |
93 |
cd->clfb[BLU]*cmon[BLU] ) >> 8; |
94 |
bi = BRT2SCALE(cmon[EXP]-COLXS) + |
95 |
logi[li] + cd->inpsfb; |
96 |
if (li <= 0) { |
97 |
bi = TM_NOBRT; /* bogus value */ |
98 |
li = 1; /* avoid li==0 */ |
99 |
} |
100 |
ls[i] = bi; |
101 |
if (cs == TM_NOCHROM) /* no color? */ |
102 |
continue; |
103 |
/* mesopic adj. */ |
104 |
if (tmTop->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
105 |
register int pf, sli = normscot(cmon); |
106 |
if (bi < BMESLOWER) |
107 |
cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
108 |
else { |
109 |
if (tmTop->flags & TM_F_BW) |
110 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
111 |
pf = tmMesofact[bi-BMESLOWER]; |
112 |
sli *= 256 - pf; |
113 |
cmon[RED] = ( sli + pf*cmon[RED] ) >> 8; |
114 |
cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8; |
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cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8; |
116 |
} |
117 |
} else if (tmTop->flags & TM_F_BW) { |
118 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
119 |
} |
120 |
bi = ( (int32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8; |
121 |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
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bi = ( (int32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8; |
123 |
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
124 |
bi = ( (int32)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 8; |
125 |
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
126 |
} |
127 |
returnOK; |
128 |
} |
129 |
|
130 |
|
131 |
#define FMTRGB 1 /* Input is RGBE */ |
132 |
#define FMTCIE 2 /* Input is CIE XYZE */ |
133 |
#define FMTUNK 3 /* Input format is unspecified */ |
134 |
#define FMTBAD 4 /* Input is not a recognized format */ |
135 |
|
136 |
static struct radhead { |
137 |
int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */ |
138 |
double expos; /* input exposure value */ |
139 |
RGBPRIMP primp; /* input primaries */ |
140 |
RGBPRIMS mypri; /* custom primaries */ |
141 |
} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS}; |
142 |
|
143 |
|
144 |
static int |
145 |
headline(s, rh) /* grok a header line */ |
146 |
register char *s; |
147 |
register struct radhead *rh; |
148 |
{ |
149 |
char fmt[32]; |
150 |
|
151 |
if (formatval(fmt, s)) { |
152 |
if (!strcmp(fmt, COLRFMT)) |
153 |
rh->format = FMTRGB; |
154 |
else if (!strcmp(fmt, CIEFMT)) |
155 |
rh->format = FMTCIE; |
156 |
else |
157 |
rh->format = FMTBAD; |
158 |
return(0); |
159 |
} |
160 |
if (isexpos(s)) { |
161 |
rh->expos *= exposval(s); |
162 |
return(0); |
163 |
} |
164 |
if (isprims(s)) { |
165 |
primsval(rh->mypri, s); |
166 |
rh->primp = rh->mypri; |
167 |
return(0); |
168 |
} |
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return(0); |
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} |
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|
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|
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int |
174 |
tmLoadPicture(lpp, cpp, xp, yp, fname, fp) /* convert Radiance picture */ |
175 |
TMbright **lpp; |
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BYTE **cpp; |
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int *xp, *yp; |
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char *fname; |
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FILE *fp; |
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{ |
181 |
char *funcName = fname==NULL ? "tmLoadPicture" : fname; |
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FILE *inpf; |
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struct radhead info; |
184 |
int err; |
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COLR *scanin = NULL; |
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int i; |
187 |
/* check arguments */ |
188 |
if (tmTop == NULL) |
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returnErr(TM_E_TMINVAL); |
190 |
if (lpp == NULL | xp == NULL | yp == NULL | |
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(fname == NULL & fp == TM_GETFILE)) |
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returnErr(TM_E_ILLEGAL); |
193 |
*xp = *yp = 0; /* error precaution */ |
194 |
if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "r")) == NULL) |
195 |
returnErr(TM_E_BADFILE); |
196 |
*lpp = NULL; |
197 |
if (cpp != TM_NOCHROMP) *cpp = NULL; |
198 |
info = rhdefault; /* get our header */ |
199 |
getheader(inpf, headline, (char *)&info); |
200 |
if (info.format == FMTBAD | info.expos <= 0. || |
201 |
fgetresolu(xp, yp, inpf) < 0) { |
202 |
err = TM_E_BADFILE; goto done; |
203 |
} |
204 |
if (info.format == FMTUNK) /* assume RGBE format */ |
205 |
info.format = FMTRGB; |
206 |
if (info.format == FMTRGB) |
207 |
info.expos /= WHTEFFICACY; |
208 |
else if (info.format == FMTCIE) |
209 |
info.primp = TM_XYZPRIM; |
210 |
/* prepare library */ |
211 |
if ((err = tmSetSpace(info.primp, 1./info.expos)) != TM_E_OK) |
212 |
goto done; |
213 |
err = TM_E_NOMEM; /* allocate arrays */ |
214 |
*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp); |
215 |
if (*lpp == NULL) |
216 |
goto done; |
217 |
if (cpp != TM_NOCHROMP) { |
218 |
*cpp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
219 |
if (*cpp == NULL) |
220 |
goto done; |
221 |
} |
222 |
scanin = (COLR *)malloc(sizeof(COLR) * *xp); |
223 |
if (scanin == NULL) |
224 |
goto done; |
225 |
err = TM_E_BADFILE; /* read & convert scanlines */ |
226 |
for (i = 0; i < *yp; i++) { |
227 |
if (freadcolrs(scanin, *xp, inpf) < 0) { |
228 |
err = TM_E_BADFILE; break; |
229 |
} |
230 |
err = tmCvColrs(*lpp + (i * *xp), |
231 |
cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp), |
232 |
scanin, *xp); |
233 |
if (err != TM_E_OK) |
234 |
break; |
235 |
} |
236 |
done: /* clean up */ |
237 |
if (fp == NULL) |
238 |
fclose(inpf); |
239 |
if (scanin != NULL) |
240 |
free((MEM_PTR)scanin); |
241 |
if (err != TM_E_OK) { |
242 |
if (*lpp != NULL) |
243 |
free((MEM_PTR)*lpp); |
244 |
if (cpp != TM_NOCHROMP && *cpp != NULL) |
245 |
free((MEM_PTR)*cpp); |
246 |
returnErr(err); |
247 |
} |
248 |
returnOK; |
249 |
} |
250 |
|
251 |
|
252 |
#ifdef PCOND |
253 |
static int /* run pcond to map picture */ |
254 |
dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname) |
255 |
BYTE **psp; |
256 |
int *xp, *yp; |
257 |
int flags; |
258 |
RGBPRIMP monpri; |
259 |
double gamval, Lddyn, Ldmax; |
260 |
char *fname; |
261 |
{ |
262 |
char *funcName = fname; |
263 |
char cmdbuf[1024]; |
264 |
FILE *infp; |
265 |
register COLR *scan; |
266 |
register BYTE *rp; |
267 |
int y; |
268 |
register int x; |
269 |
/* set up gamma correction */ |
270 |
if (setcolrcor(pow, 1./gamval) < 0) |
271 |
returnErr(TM_E_NOMEM); |
272 |
/* create command */ |
273 |
strcpy(cmdbuf, PCOND); |
274 |
if (flags & TM_F_HCONTR) |
275 |
strcat(cmdbuf, " -s"); |
276 |
if (flags & TM_F_MESOPIC) |
277 |
strcat(cmdbuf, " -c"); |
278 |
if (flags & TM_F_LINEAR) |
279 |
strcat(cmdbuf, " -l"); |
280 |
if (flags & TM_F_ACUITY) |
281 |
strcat(cmdbuf, " -a"); |
282 |
if (flags & TM_F_VEIL) |
283 |
strcat(cmdbuf, " -v"); |
284 |
if (flags & TM_F_CWEIGHT) |
285 |
strcat(cmdbuf, " -w"); |
286 |
if (monpri != stdprims) |
287 |
sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f", |
288 |
monpri[RED][CIEX], monpri[RED][CIEY], |
289 |
monpri[GRN][CIEX], monpri[GRN][CIEY], |
290 |
monpri[BLU][CIEX], monpri[BLU][CIEY], |
291 |
monpri[WHT][CIEX], monpri[WHT][CIEY]); |
292 |
sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname); |
293 |
/* start pcond */ |
294 |
if ((infp = popen(cmdbuf, "r")) == NULL) |
295 |
returnErr(TM_E_BADFILE); |
296 |
/* check picture format and size */ |
297 |
if (checkheader(infp, COLRFMT, NULL) < 0 || |
298 |
fgetresolu(xp, yp, infp) < 0) { |
299 |
pclose(infp); |
300 |
returnErr(TM_E_BADFILE); |
301 |
} |
302 |
/* allocate arrays */ |
303 |
scan = (COLR *)malloc(sizeof(COLR) * *xp); |
304 |
if (flags & TM_F_BW) |
305 |
rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
306 |
else |
307 |
rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
308 |
if ((*psp = rp) == NULL | scan == NULL) { |
309 |
pclose(infp); |
310 |
returnErr(TM_E_NOMEM); |
311 |
} |
312 |
/* read and gamma map file */ |
313 |
for (y = 0; y < *yp; y++) { |
314 |
if (freadcolrs(scan, *xp, infp) < 0) { |
315 |
pclose(infp); |
316 |
free((MEM_PTR)scan); |
317 |
free((MEM_PTR)*psp); |
318 |
*psp = NULL; |
319 |
returnErr(TM_E_BADFILE); |
320 |
} |
321 |
colrs_gambs(scan, *xp); |
322 |
if (flags & TM_F_BW) |
323 |
for (x = 0; x < *xp; x++) |
324 |
*rp++ = normbright(scan[x]); |
325 |
else |
326 |
for (x = 0; x < *xp; x++) { |
327 |
*rp++ = scan[x][RED]; |
328 |
*rp++ = scan[x][GRN]; |
329 |
*rp++ = scan[x][BLU]; |
330 |
} |
331 |
} |
332 |
free((MEM_PTR)scan); |
333 |
pclose(infp); |
334 |
returnOK; |
335 |
} |
336 |
#endif |
337 |
|
338 |
|
339 |
int /* map a Radiance picture */ |
340 |
tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp) |
341 |
BYTE **psp; |
342 |
int *xp, *yp; |
343 |
int flags; |
344 |
RGBPRIMP monpri; |
345 |
double gamval, Lddyn, Ldmax; |
346 |
char *fname; |
347 |
FILE *fp; |
348 |
{ |
349 |
char *funcName = fname==NULL ? "tmMapPicture" : fname; |
350 |
BYTE *cp; |
351 |
TMbright *lp; |
352 |
int err; |
353 |
/* check arguments */ |
354 |
if (psp == NULL | xp == NULL | yp == NULL | monpri == NULL | |
355 |
(fname == NULL & fp == TM_GETFILE)) |
356 |
returnErr(TM_E_ILLEGAL); |
357 |
/* set defaults */ |
358 |
if (gamval < MINGAM) gamval = DEFGAM; |
359 |
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN; |
360 |
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX; |
361 |
if (flags & TM_F_BW) monpri = stdprims; |
362 |
#ifdef PCOND |
363 |
/* check for pcond run */ |
364 |
if (fp == TM_GETFILE && flags & TM_F_UNIMPL) |
365 |
return( dopcond(psp, xp, yp, flags, |
366 |
monpri, gamval, Lddyn, Ldmax, fname) ); |
367 |
#endif |
368 |
/* initialize tone mapping */ |
369 |
if (tmInit(flags, monpri, gamval) == NULL) |
370 |
returnErr(TM_E_NOMEM); |
371 |
/* load & convert picture */ |
372 |
err = tmLoadPicture(&lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp, |
373 |
xp, yp, fname, fp); |
374 |
if (err != TM_E_OK) { |
375 |
tmDone(NULL); |
376 |
return(err); |
377 |
} |
378 |
/* allocate space for result */ |
379 |
if (flags & TM_F_BW) { |
380 |
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
381 |
if (*psp == NULL) { |
382 |
free((MEM_PTR)lp); |
383 |
tmDone(NULL); |
384 |
returnErr(TM_E_NOMEM); |
385 |
} |
386 |
cp = TM_NOCHROM; |
387 |
} else |
388 |
*psp = cp; |
389 |
/* compute color mapping */ |
390 |
err = tmAddHisto(lp, *xp * *yp, 1); |
391 |
if (err != TM_E_OK) |
392 |
goto done; |
393 |
err = tmComputeMapping(gamval, Lddyn, Ldmax); |
394 |
if (err != TM_E_OK) |
395 |
goto done; |
396 |
/* map colors */ |
397 |
err = tmMapPixels(*psp, lp, cp, *xp * *yp); |
398 |
|
399 |
done: /* clean up */ |
400 |
free((MEM_PTR)lp); |
401 |
tmDone(NULL); |
402 |
if (err != TM_E_OK) { /* free memory on error */ |
403 |
free((MEM_PTR)*psp); |
404 |
*psp = NULL; |
405 |
returnErr(err); |
406 |
} |
407 |
returnOK; |
408 |
} |
409 |
|
410 |
|
411 |
static void |
412 |
colrNewSpace(tms) /* color space changed for tone mapping */ |
413 |
register struct tmStruct *tms; |
414 |
{ |
415 |
register COLRDATA *cd; |
416 |
double d; |
417 |
|
418 |
cd = (COLRDATA *)tms->pd[colrReg]; |
419 |
cd->clfb[RED] = 256.*tms->clf[RED] + .5; |
420 |
cd->clfb[GRN] = 256.*tms->clf[GRN] + .5; |
421 |
cd->clfb[BLU] = 256.*tms->clf[BLU] + .5; |
422 |
cd->clfb[EXP] = COLXS; |
423 |
d = TM_BRTSCALE*log(tms->inpsf); |
424 |
cd->inpsfb = d<0. ? d-.5 : d+.5; |
425 |
} |
426 |
|
427 |
|
428 |
static MEM_PTR |
429 |
colrInit(tms) /* initialize private data for tone mapping */ |
430 |
register struct tmStruct *tms; |
431 |
{ |
432 |
register COLRDATA *cd; |
433 |
register int i; |
434 |
/* allocate our data */ |
435 |
cd = (COLRDATA *)malloc(sizeof(COLRDATA)); |
436 |
if (cd == NULL) |
437 |
return(NULL); |
438 |
tms->pd[colrReg] = (MEM_PTR)cd; |
439 |
/* compute gamma table */ |
440 |
for (i = GAMTSZ; i--; ) |
441 |
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam); |
442 |
/* compute color and scale factors */ |
443 |
colrNewSpace(tms); |
444 |
return((MEM_PTR)cd); |
445 |
} |