1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: tmapcolrs.c,v 3.14 2003/07/27 22:12:01 schorsch 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 |
static MEM_PTR colrInit(struct tmStruct *); |
32 |
static void colrNewSpace(struct tmStruct *); |
33 |
static gethfunc headline; |
34 |
|
35 |
static struct tmPackage colrPkg = { /* our package functions */ |
36 |
colrInit, colrNewSpace, free |
37 |
}; |
38 |
static int colrReg = -1; /* our package registration number */ |
39 |
|
40 |
#define LOGISZ 260 |
41 |
static TMbright logi[LOGISZ]; |
42 |
|
43 |
|
44 |
int |
45 |
tmCvColrs(ls, cs, scan, len) /* convert RGBE/XYZE colors */ |
46 |
TMbright *ls; |
47 |
BYTE *cs; |
48 |
COLR *scan; |
49 |
int len; |
50 |
{ |
51 |
static char funcName[] = "tmCvColrs"; |
52 |
COLR cmon; |
53 |
register COLRDATA *cd; |
54 |
register int i, bi, li; |
55 |
|
56 |
if (tmTop == NULL) |
57 |
returnErr(TM_E_TMINVAL); |
58 |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
59 |
returnErr(TM_E_ILLEGAL); |
60 |
#if TM_PIC_CTRANS |
61 |
if (tmNeedMatrix(tmTop)) { /* need floating point */ |
62 |
#else |
63 |
if (tmTop->inppri == TM_XYZPRIM) { /* no way around this */ |
64 |
#endif |
65 |
register COLOR *newscan; |
66 |
newscan = (COLOR *)tempbuffer(len*sizeof(COLOR)); |
67 |
if (newscan == NULL) |
68 |
returnErr(TM_E_NOMEM); |
69 |
for (i = len; i--; ) |
70 |
colr_color(newscan[i], scan[i]); |
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return(tmCvColors(ls, cs, newscan, len)); |
72 |
} |
73 |
if (colrReg < 0) { /* build tables if necessary */ |
74 |
colrReg = tmRegPkg(&colrPkg); |
75 |
if (colrReg < 0) |
76 |
returnErr(TM_E_CODERR1); |
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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; |
81 |
tmMkMesofact(); |
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} |
83 |
if ((cd = (COLRDATA *)tmPkgData(tmTop,colrReg)) == NULL) |
84 |
returnErr(TM_E_NOMEM); |
85 |
for (i = len; i--; ) { |
86 |
copycolr(cmon, scan[i]); |
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/* world luminance */ |
88 |
li = ( cd->clfb[RED]*cmon[RED] + |
89 |
cd->clfb[GRN]*cmon[GRN] + |
90 |
cd->clfb[BLU]*cmon[BLU] ) >> 8; |
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bi = BRT2SCALE(cmon[EXP]-COLXS) + |
92 |
logi[li] + cd->inpsfb; |
93 |
if (li <= 0) { |
94 |
bi = TM_NOBRT; /* bogus value */ |
95 |
li = 1; /* avoid li==0 */ |
96 |
} |
97 |
ls[i] = bi; |
98 |
if (cs == TM_NOCHROM) /* no color? */ |
99 |
continue; |
100 |
/* mesopic adj. */ |
101 |
if (tmTop->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
102 |
register int pf, sli = normscot(cmon); |
103 |
if (bi < BMESLOWER) |
104 |
cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
105 |
else { |
106 |
if (tmTop->flags & TM_F_BW) |
107 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
108 |
pf = tmMesofact[bi-BMESLOWER]; |
109 |
sli *= 256 - pf; |
110 |
cmon[RED] = ( sli + pf*cmon[RED] ) >> 8; |
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cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8; |
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cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8; |
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} |
114 |
} else if (tmTop->flags & TM_F_BW) { |
115 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
116 |
} |
117 |
bi = ( (int32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8; |
118 |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
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bi = ( (int32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8; |
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cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
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bi = ( (int32)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 8; |
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cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
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} |
124 |
returnOK; |
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} |
126 |
|
127 |
|
128 |
#define FMTRGB 1 /* Input is RGBE */ |
129 |
#define FMTCIE 2 /* Input is CIE XYZE */ |
130 |
#define FMTUNK 3 /* Input format is unspecified */ |
131 |
#define FMTBAD 4 /* Input is not a recognized format */ |
132 |
|
133 |
static struct radhead { |
134 |
int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */ |
135 |
double expos; /* input exposure value */ |
136 |
RGBPRIMP primp; /* input primaries */ |
137 |
RGBPRIMS mypri; /* custom primaries */ |
138 |
} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS}; |
139 |
|
140 |
|
141 |
static int |
142 |
headline( /* grok a header line */ |
143 |
register char *s, |
144 |
void *vrh |
145 |
) |
146 |
{ |
147 |
char fmt[32]; |
148 |
register struct radhead *rh = vrh; |
149 |
|
150 |
if (formatval(fmt, s)) { |
151 |
if (!strcmp(fmt, COLRFMT)) |
152 |
rh->format = FMTRGB; |
153 |
else if (!strcmp(fmt, CIEFMT)) |
154 |
rh->format = FMTCIE; |
155 |
else |
156 |
rh->format = FMTBAD; |
157 |
return(0); |
158 |
} |
159 |
if (isexpos(s)) { |
160 |
rh->expos *= exposval(s); |
161 |
return(0); |
162 |
} |
163 |
if (isprims(s)) { |
164 |
primsval(rh->mypri, s); |
165 |
rh->primp = rh->mypri; |
166 |
return(0); |
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} |
168 |
return(0); |
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} |
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|
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|
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int |
173 |
tmLoadPicture(lpp, cpp, xp, yp, fname, fp) /* convert Radiance picture */ |
174 |
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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{ |
180 |
char *funcName = fname==NULL ? "tmLoadPicture" : fname; |
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FILE *inpf; |
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struct radhead info; |
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int err; |
184 |
COLR *scanin = NULL; |
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int i; |
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/* check arguments */ |
187 |
if (tmTop == NULL) |
188 |
returnErr(TM_E_TMINVAL); |
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if ((lpp == NULL) | (xp == NULL) | (yp == NULL) | |
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((fname == NULL) & (fp == TM_GETFILE))) |
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returnErr(TM_E_ILLEGAL); |
192 |
*xp = *yp = 0; /* error precaution */ |
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if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "r")) == NULL) |
194 |
returnErr(TM_E_BADFILE); |
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*lpp = NULL; |
196 |
if (cpp != TM_NOCHROMP) *cpp = NULL; |
197 |
info = rhdefault; /* get our header */ |
198 |
getheader(inpf, headline, &info); |
199 |
if ((info.format == FMTBAD) | (info.expos <= 0.) || |
200 |
fgetresolu(xp, yp, inpf) < 0) { |
201 |
err = TM_E_BADFILE; goto done; |
202 |
} |
203 |
if (info.format == FMTUNK) /* assume RGBE format */ |
204 |
info.format = FMTRGB; |
205 |
if (info.format == FMTRGB) |
206 |
info.expos /= WHTEFFICACY; |
207 |
else if (info.format == FMTCIE) |
208 |
info.primp = TM_XYZPRIM; |
209 |
/* prepare library */ |
210 |
if ((err = tmSetSpace(info.primp, 1./info.expos)) != TM_E_OK) |
211 |
goto done; |
212 |
err = TM_E_NOMEM; /* allocate arrays */ |
213 |
*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp); |
214 |
if (*lpp == NULL) |
215 |
goto done; |
216 |
if (cpp != TM_NOCHROMP) { |
217 |
*cpp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
218 |
if (*cpp == NULL) |
219 |
goto done; |
220 |
} |
221 |
scanin = (COLR *)malloc(sizeof(COLR) * *xp); |
222 |
if (scanin == NULL) |
223 |
goto done; |
224 |
err = TM_E_BADFILE; /* read & convert scanlines */ |
225 |
for (i = 0; i < *yp; i++) { |
226 |
if (freadcolrs(scanin, *xp, inpf) < 0) { |
227 |
err = TM_E_BADFILE; break; |
228 |
} |
229 |
err = tmCvColrs(*lpp + (i * *xp), |
230 |
cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp), |
231 |
scanin, *xp); |
232 |
if (err != TM_E_OK) |
233 |
break; |
234 |
} |
235 |
done: /* clean up */ |
236 |
if (fp == NULL) |
237 |
fclose(inpf); |
238 |
if (scanin != NULL) |
239 |
free((MEM_PTR)scanin); |
240 |
if (err != TM_E_OK) { |
241 |
if (*lpp != NULL) |
242 |
free((MEM_PTR)*lpp); |
243 |
if (cpp != TM_NOCHROMP && *cpp != NULL) |
244 |
free((MEM_PTR)*cpp); |
245 |
returnErr(err); |
246 |
} |
247 |
returnOK; |
248 |
} |
249 |
|
250 |
|
251 |
#ifdef PCOND |
252 |
static int /* run pcond to map picture */ |
253 |
dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname) |
254 |
BYTE **psp; |
255 |
int *xp, *yp; |
256 |
int flags; |
257 |
RGBPRIMP monpri; |
258 |
double gamval, Lddyn, Ldmax; |
259 |
char *fname; |
260 |
{ |
261 |
char *funcName = fname; |
262 |
char cmdbuf[1024]; |
263 |
FILE *infp; |
264 |
register COLR *scan; |
265 |
register BYTE *rp; |
266 |
int y; |
267 |
register int x; |
268 |
/* set up gamma correction */ |
269 |
if (setcolrcor(pow, 1./gamval) < 0) |
270 |
returnErr(TM_E_NOMEM); |
271 |
/* create command */ |
272 |
strcpy(cmdbuf, PCOND); |
273 |
if (flags & TM_F_HCONTR) |
274 |
strcat(cmdbuf, " -s"); |
275 |
if (flags & TM_F_MESOPIC) |
276 |
strcat(cmdbuf, " -c"); |
277 |
if (flags & TM_F_LINEAR) |
278 |
strcat(cmdbuf, " -l"); |
279 |
if (flags & TM_F_ACUITY) |
280 |
strcat(cmdbuf, " -a"); |
281 |
if (flags & TM_F_VEIL) |
282 |
strcat(cmdbuf, " -v"); |
283 |
if (flags & TM_F_CWEIGHT) |
284 |
strcat(cmdbuf, " -w"); |
285 |
if (monpri != stdprims) |
286 |
sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f", |
287 |
monpri[RED][CIEX], monpri[RED][CIEY], |
288 |
monpri[GRN][CIEX], monpri[GRN][CIEY], |
289 |
monpri[BLU][CIEX], monpri[BLU][CIEY], |
290 |
monpri[WHT][CIEX], monpri[WHT][CIEY]); |
291 |
sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname); |
292 |
/* start pcond */ |
293 |
if ((infp = popen(cmdbuf, "r")) == NULL) |
294 |
returnErr(TM_E_BADFILE); |
295 |
/* check picture format and size */ |
296 |
if (checkheader(infp, COLRFMT, NULL) < 0 || |
297 |
fgetresolu(xp, yp, infp) < 0) { |
298 |
pclose(infp); |
299 |
returnErr(TM_E_BADFILE); |
300 |
} |
301 |
/* allocate arrays */ |
302 |
scan = (COLR *)malloc(sizeof(COLR) * *xp); |
303 |
if (flags & TM_F_BW) |
304 |
rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
305 |
else |
306 |
rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
307 |
if (((*psp = rp) == NULL) | (scan == NULL)) { |
308 |
pclose(infp); |
309 |
returnErr(TM_E_NOMEM); |
310 |
} |
311 |
/* read and gamma map file */ |
312 |
for (y = 0; y < *yp; y++) { |
313 |
if (freadcolrs(scan, *xp, infp) < 0) { |
314 |
pclose(infp); |
315 |
free((MEM_PTR)scan); |
316 |
free((MEM_PTR)*psp); |
317 |
*psp = NULL; |
318 |
returnErr(TM_E_BADFILE); |
319 |
} |
320 |
colrs_gambs(scan, *xp); |
321 |
if (flags & TM_F_BW) |
322 |
for (x = 0; x < *xp; x++) |
323 |
*rp++ = normbright(scan[x]); |
324 |
else |
325 |
for (x = 0; x < *xp; x++) { |
326 |
*rp++ = scan[x][RED]; |
327 |
*rp++ = scan[x][GRN]; |
328 |
*rp++ = scan[x][BLU]; |
329 |
} |
330 |
} |
331 |
free((MEM_PTR)scan); |
332 |
pclose(infp); |
333 |
returnOK; |
334 |
} |
335 |
#endif |
336 |
|
337 |
|
338 |
int /* map a Radiance picture */ |
339 |
tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp) |
340 |
BYTE **psp; |
341 |
int *xp, *yp; |
342 |
int flags; |
343 |
RGBPRIMP monpri; |
344 |
double gamval, Lddyn, Ldmax; |
345 |
char *fname; |
346 |
FILE *fp; |
347 |
{ |
348 |
char *funcName = fname==NULL ? "tmMapPicture" : fname; |
349 |
BYTE *cp; |
350 |
TMbright *lp; |
351 |
int err; |
352 |
/* check arguments */ |
353 |
if ((psp == NULL) | (xp == NULL) | (yp == NULL) | (monpri == NULL) | |
354 |
((fname == NULL) & (fp == TM_GETFILE))) |
355 |
returnErr(TM_E_ILLEGAL); |
356 |
/* set defaults */ |
357 |
if (gamval < MINGAM) gamval = DEFGAM; |
358 |
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN; |
359 |
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX; |
360 |
if (flags & TM_F_BW) monpri = stdprims; |
361 |
#ifdef PCOND |
362 |
/* check for pcond run */ |
363 |
if (fp == TM_GETFILE && flags & TM_F_UNIMPL) |
364 |
return( dopcond(psp, xp, yp, flags, |
365 |
monpri, gamval, Lddyn, Ldmax, fname) ); |
366 |
#endif |
367 |
/* initialize tone mapping */ |
368 |
if (tmInit(flags, monpri, gamval) == NULL) |
369 |
returnErr(TM_E_NOMEM); |
370 |
/* load & convert picture */ |
371 |
err = tmLoadPicture(&lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp, |
372 |
xp, yp, fname, fp); |
373 |
if (err != TM_E_OK) { |
374 |
tmDone(NULL); |
375 |
return(err); |
376 |
} |
377 |
/* allocate space for result */ |
378 |
if (flags & TM_F_BW) { |
379 |
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
380 |
if (*psp == NULL) { |
381 |
free((MEM_PTR)lp); |
382 |
tmDone(NULL); |
383 |
returnErr(TM_E_NOMEM); |
384 |
} |
385 |
cp = TM_NOCHROM; |
386 |
} else |
387 |
*psp = cp; |
388 |
/* compute color mapping */ |
389 |
err = tmAddHisto(lp, *xp * *yp, 1); |
390 |
if (err != TM_E_OK) |
391 |
goto done; |
392 |
err = tmComputeMapping(gamval, Lddyn, Ldmax); |
393 |
if (err != TM_E_OK) |
394 |
goto done; |
395 |
/* map colors */ |
396 |
err = tmMapPixels(*psp, lp, cp, *xp * *yp); |
397 |
|
398 |
done: /* clean up */ |
399 |
free((MEM_PTR)lp); |
400 |
tmDone(NULL); |
401 |
if (err != TM_E_OK) { /* free memory on error */ |
402 |
free((MEM_PTR)*psp); |
403 |
*psp = NULL; |
404 |
returnErr(err); |
405 |
} |
406 |
returnOK; |
407 |
} |
408 |
|
409 |
|
410 |
static void |
411 |
colrNewSpace(tms) /* color space changed for tone mapping */ |
412 |
register struct tmStruct *tms; |
413 |
{ |
414 |
register COLRDATA *cd; |
415 |
double d; |
416 |
|
417 |
cd = (COLRDATA *)tms->pd[colrReg]; |
418 |
cd->clfb[RED] = 256.*tms->clf[RED] + .5; |
419 |
cd->clfb[GRN] = 256.*tms->clf[GRN] + .5; |
420 |
cd->clfb[BLU] = 256.*tms->clf[BLU] + .5; |
421 |
cd->clfb[EXP] = COLXS; |
422 |
d = TM_BRTSCALE*log(tms->inpsf); |
423 |
cd->inpsfb = d<0. ? d-.5 : d+.5; |
424 |
} |
425 |
|
426 |
|
427 |
static MEM_PTR |
428 |
colrInit(tms) /* initialize private data for tone mapping */ |
429 |
register struct tmStruct *tms; |
430 |
{ |
431 |
register COLRDATA *cd; |
432 |
register int i; |
433 |
/* allocate our data */ |
434 |
cd = (COLRDATA *)malloc(sizeof(COLRDATA)); |
435 |
if (cd == NULL) |
436 |
return(NULL); |
437 |
tms->pd[colrReg] = (MEM_PTR)cd; |
438 |
/* compute gamma table */ |
439 |
for (i = GAMTSZ; i--; ) |
440 |
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam); |
441 |
/* compute color and scale factors */ |
442 |
colrNewSpace(tms); |
443 |
return((MEM_PTR)cd); |
444 |
} |