1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: tmapcolrs.c,v 3.25 2006/05/31 19:27:42 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 <stdlib.h> |
14 |
#include <string.h> |
15 |
#include <math.h> |
16 |
#include <time.h> |
17 |
|
18 |
#include "tmprivat.h" |
19 |
#include "resolu.h" |
20 |
#ifdef PCOND |
21 |
#include "rtprocess.h" |
22 |
#endif |
23 |
|
24 |
#define GAMTSZ 1024 |
25 |
|
26 |
typedef struct { |
27 |
BYTE gamb[GAMTSZ]; /* gamma lookup table */ |
28 |
int clfb[3]; /* encoded tm->clf */ |
29 |
int32 cmatb[3][3]; /* encoded color transform */ |
30 |
TMbright inpsfb; /* encoded tm->inpsf */ |
31 |
} COLRDATA; |
32 |
|
33 |
static MEM_PTR colrInit(TMstruct *); |
34 |
static void colrNewSpace(TMstruct *); |
35 |
static gethfunc headline; |
36 |
|
37 |
static struct tmPackage colrPkg = { /* our package functions */ |
38 |
colrInit, colrNewSpace, free |
39 |
}; |
40 |
static int colrReg = -1; /* our package registration number */ |
41 |
|
42 |
#define LOGISZ 260 |
43 |
static TMbright logi[LOGISZ]; |
44 |
|
45 |
|
46 |
int |
47 |
tmCvColrs( /* convert RGBE/XYZE colors */ |
48 |
TMstruct *tms, |
49 |
TMbright *ls, |
50 |
BYTE *cs, |
51 |
COLR *scan, |
52 |
int len |
53 |
) |
54 |
{ |
55 |
static const char funcName[] = "tmCvColrs"; |
56 |
int cmon[4]; |
57 |
register COLRDATA *cd; |
58 |
register int i, j, li, bi; |
59 |
int32 vl; |
60 |
|
61 |
if (tms == NULL) |
62 |
returnErr(TM_E_TMINVAL); |
63 |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
64 |
returnErr(TM_E_ILLEGAL); |
65 |
if (colrReg < 0) { /* build tables if necessary */ |
66 |
colrReg = tmRegPkg(&colrPkg); |
67 |
if (colrReg < 0) |
68 |
returnErr(TM_E_CODERR1); |
69 |
for (i = 256; i--; ) |
70 |
logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5; |
71 |
for (i = 256; i < LOGISZ; i++) |
72 |
logi[i] = 0; |
73 |
tmMkMesofact(); |
74 |
} |
75 |
if ((cd = (COLRDATA *)tmPkgData(tms,colrReg)) == NULL) |
76 |
returnErr(TM_E_NOMEM); |
77 |
for (i = len; i--; ) { |
78 |
if (tmNeedMatrix(tms)) { /* apply color xform */ |
79 |
for (j = 3; j--; ) { |
80 |
vl = cd->cmatb[j][RED]*(int32)scan[i][RED] + |
81 |
cd->cmatb[j][GRN]*(int32)scan[i][GRN] + |
82 |
cd->cmatb[j][BLU]*(int32)scan[i][BLU] ; |
83 |
if (vl < 0) cmon[j] = vl/0x10000; |
84 |
else cmon[j] = vl>>16; |
85 |
} |
86 |
cmon[EXP] = scan[i][EXP]; |
87 |
} else |
88 |
copycolr(cmon, scan[i]); |
89 |
/* world luminance */ |
90 |
li = cd->clfb[RED]*cmon[RED] + |
91 |
cd->clfb[GRN]*cmon[GRN] + |
92 |
cd->clfb[BLU]*cmon[BLU] ; |
93 |
if (li >= 0xfff00) li = 255; |
94 |
else li >>= 12; |
95 |
bi = BRT2SCALE(cmon[EXP]-COLXS) + cd->inpsfb; |
96 |
if (li > 0) |
97 |
bi += logi[li]; |
98 |
else { |
99 |
bi += logi[0]; |
100 |
li = 1; /* avoid /0 */ |
101 |
} |
102 |
ls[i] = bi; |
103 |
if (cs == TM_NOCHROM) /* no color? */ |
104 |
continue; |
105 |
/* mesopic adj. */ |
106 |
if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
107 |
int pf, sli = normscot(cmon); |
108 |
if (bi < BMESLOWER) { |
109 |
cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
110 |
} else { |
111 |
if (tms->flags & TM_F_BW) |
112 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
113 |
pf = tmMesofact[bi-BMESLOWER]; |
114 |
sli *= 256 - pf; |
115 |
for (j = 3; j--; ) { |
116 |
cmon[j] = sli + pf*cmon[j]; |
117 |
if (cmon[j] <= 0) cmon[j] = 0; |
118 |
else cmon[j] >>= 8; |
119 |
} |
120 |
} |
121 |
} else if (tms->flags & TM_F_BW) { |
122 |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
123 |
} else { |
124 |
for (j = 3; j--; ) |
125 |
if (cmon[j] < 0) cmon[j] = 0; |
126 |
} |
127 |
bi = ( (int32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 12; |
128 |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
129 |
bi = ( (int32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 12; |
130 |
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
131 |
bi = ( (int32)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 12; |
132 |
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
133 |
} |
134 |
returnOK; |
135 |
} |
136 |
|
137 |
|
138 |
#define FMTRGB 1 /* Input is RGBE */ |
139 |
#define FMTCIE 2 /* Input is CIE XYZE */ |
140 |
#define FMTUNK 3 /* Input format is unspecified */ |
141 |
#define FMTBAD 4 /* Input is not a recognized format */ |
142 |
|
143 |
static struct radhead { |
144 |
int format; /* FMTRGB, FMTCIE, FMTUNK, FMTBAD */ |
145 |
double expos; /* input exposure value */ |
146 |
RGBPRIMP primp; /* input primaries */ |
147 |
RGBPRIMS mypri; /* custom primaries */ |
148 |
} rhdefault = {FMTUNK, 1., stdprims, STDPRIMS}; |
149 |
|
150 |
|
151 |
static int |
152 |
headline( /* grok a header line */ |
153 |
register char *s, |
154 |
void *vrh |
155 |
) |
156 |
{ |
157 |
char fmt[32]; |
158 |
register struct radhead *rh = vrh; |
159 |
|
160 |
if (formatval(fmt, s)) { |
161 |
if (!strcmp(fmt, COLRFMT)) |
162 |
rh->format = FMTRGB; |
163 |
else if (!strcmp(fmt, CIEFMT)) |
164 |
rh->format = FMTCIE; |
165 |
else |
166 |
rh->format = FMTBAD; |
167 |
return(0); |
168 |
} |
169 |
if (isexpos(s)) { |
170 |
rh->expos *= exposval(s); |
171 |
return(0); |
172 |
} |
173 |
if (isprims(s)) { |
174 |
primsval(rh->mypri, s); |
175 |
rh->primp = rh->mypri; |
176 |
return(0); |
177 |
} |
178 |
return(0); |
179 |
} |
180 |
|
181 |
|
182 |
int |
183 |
tmLoadPicture( /* convert Radiance picture */ |
184 |
TMstruct *tms, |
185 |
TMbright **lpp, |
186 |
BYTE **cpp, |
187 |
int *xp, |
188 |
int *yp, |
189 |
char *fname, |
190 |
FILE *fp |
191 |
) |
192 |
{ |
193 |
char *funcName = fname==NULL ? "tmLoadPicture" : fname; |
194 |
FILE *inpf; |
195 |
struct radhead info; |
196 |
int err; |
197 |
COLR *scanin = NULL; |
198 |
int i; |
199 |
/* check arguments */ |
200 |
if (tms == NULL) |
201 |
returnErr(TM_E_TMINVAL); |
202 |
if ((lpp == NULL) | (xp == NULL) | (yp == NULL) | |
203 |
((fname == NULL) & (fp == TM_GETFILE))) |
204 |
returnErr(TM_E_ILLEGAL); |
205 |
*xp = *yp = 0; /* error precaution */ |
206 |
if ((inpf = fp) == TM_GETFILE && (inpf = fopen(fname, "rb")) == NULL) |
207 |
returnErr(TM_E_BADFILE); |
208 |
*lpp = NULL; |
209 |
if (cpp != TM_NOCHROMP) *cpp = NULL; |
210 |
info = rhdefault; /* get our header */ |
211 |
getheader(inpf, headline, &info); |
212 |
if ((info.format == FMTBAD) | (info.expos <= 0.) || |
213 |
fgetresolu(xp, yp, inpf) < 0) { |
214 |
err = TM_E_BADFILE; goto done; |
215 |
} |
216 |
if (info.format == FMTUNK) /* assume RGBE format */ |
217 |
info.format = FMTRGB; |
218 |
if (info.format == FMTRGB) |
219 |
info.expos /= WHTEFFICACY; |
220 |
else if (info.format == FMTCIE) |
221 |
info.primp = TM_XYZPRIM; |
222 |
/* prepare library */ |
223 |
if ((err = tmSetSpace(tms, info.primp, 1./info.expos, NULL)) != TM_E_OK) |
224 |
goto done; |
225 |
err = TM_E_NOMEM; /* allocate arrays */ |
226 |
*lpp = (TMbright *)malloc(sizeof(TMbright) * *xp * *yp); |
227 |
if (*lpp == NULL) |
228 |
goto done; |
229 |
if (cpp != TM_NOCHROMP) { |
230 |
*cpp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
231 |
if (*cpp == NULL) |
232 |
goto done; |
233 |
} |
234 |
scanin = (COLR *)malloc(sizeof(COLR) * *xp); |
235 |
if (scanin == NULL) |
236 |
goto done; |
237 |
err = TM_E_BADFILE; /* read & convert scanlines */ |
238 |
for (i = 0; i < *yp; i++) { |
239 |
if (freadcolrs(scanin, *xp, inpf) < 0) { |
240 |
err = TM_E_BADFILE; break; |
241 |
} |
242 |
err = tmCvColrs(tms, *lpp + (i * *xp), |
243 |
cpp==TM_NOCHROMP ? TM_NOCHROM : *cpp + (i * 3 * *xp), |
244 |
scanin, *xp); |
245 |
if (err != TM_E_OK) |
246 |
break; |
247 |
} |
248 |
done: /* clean up */ |
249 |
if (fp == NULL) |
250 |
fclose(inpf); |
251 |
if (scanin != NULL) |
252 |
free((MEM_PTR)scanin); |
253 |
if (err != TM_E_OK) { |
254 |
if (*lpp != NULL) |
255 |
free((MEM_PTR)*lpp); |
256 |
if (cpp != TM_NOCHROMP && *cpp != NULL) |
257 |
free((MEM_PTR)*cpp); |
258 |
returnErr(err); |
259 |
} |
260 |
returnOK; |
261 |
} |
262 |
|
263 |
|
264 |
#ifdef PCOND |
265 |
static int /* run pcond to map picture */ |
266 |
dopcond(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname) |
267 |
BYTE **psp; |
268 |
int *xp, *yp; |
269 |
int flags; |
270 |
RGBPRIMP monpri; |
271 |
double gamval, Lddyn, Ldmax; |
272 |
char *fname; |
273 |
{ |
274 |
char *funcName = fname; |
275 |
TMstruct *tms = NULL; |
276 |
char cmdbuf[1024]; |
277 |
FILE *infp; |
278 |
register COLR *scan; |
279 |
register BYTE *rp; |
280 |
int y; |
281 |
register int x; |
282 |
/* set up gamma correction */ |
283 |
if (setcolrcor(pow, 1./gamval) < 0) |
284 |
returnErr(TM_E_NOMEM); |
285 |
/* create command */ |
286 |
strcpy(cmdbuf, PCOND); |
287 |
if (flags & TM_F_HCONTR) |
288 |
strcat(cmdbuf, " -s"); |
289 |
if (flags & TM_F_MESOPIC) |
290 |
strcat(cmdbuf, " -c"); |
291 |
if (flags & TM_F_LINEAR) |
292 |
strcat(cmdbuf, " -l"); |
293 |
if (flags & TM_F_ACUITY) |
294 |
strcat(cmdbuf, " -a"); |
295 |
if (flags & TM_F_VEIL) |
296 |
strcat(cmdbuf, " -v"); |
297 |
if (flags & TM_F_CWEIGHT) |
298 |
strcat(cmdbuf, " -w"); |
299 |
if (monpri != stdprims) |
300 |
sprintf(cmdbuf+strlen(cmdbuf), " -p %f %f %f %f %f %f %f %f", |
301 |
monpri[RED][CIEX], monpri[RED][CIEY], |
302 |
monpri[GRN][CIEX], monpri[GRN][CIEY], |
303 |
monpri[BLU][CIEX], monpri[BLU][CIEY], |
304 |
monpri[WHT][CIEX], monpri[WHT][CIEY]); |
305 |
sprintf(cmdbuf+strlen(cmdbuf), " -d %f -u %f %s", Lddyn, Ldmax, fname); |
306 |
/* start pcond */ |
307 |
if ((infp = popen(cmdbuf, "r")) == NULL) |
308 |
returnErr(TM_E_BADFILE); |
309 |
/* check picture format and size */ |
310 |
if (checkheader(infp, COLRFMT, NULL) < 0 || |
311 |
fgetresolu(xp, yp, infp) < 0) { |
312 |
pclose(infp); |
313 |
returnErr(TM_E_BADFILE); |
314 |
} |
315 |
/* allocate arrays */ |
316 |
scan = (COLR *)malloc(sizeof(COLR) * *xp); |
317 |
if (flags & TM_F_BW) |
318 |
rp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
319 |
else |
320 |
rp = (BYTE *)malloc(3*sizeof(BYTE) * *xp * *yp); |
321 |
if (((*psp = rp) == NULL) | (scan == NULL)) { |
322 |
pclose(infp); |
323 |
returnErr(TM_E_NOMEM); |
324 |
} |
325 |
/* read and gamma map file */ |
326 |
for (y = 0; y < *yp; y++) { |
327 |
if (freadcolrs(scan, *xp, infp) < 0) { |
328 |
pclose(infp); |
329 |
free((MEM_PTR)scan); |
330 |
free((MEM_PTR)*psp); |
331 |
*psp = NULL; |
332 |
returnErr(TM_E_BADFILE); |
333 |
} |
334 |
colrs_gambs(scan, *xp); |
335 |
if (flags & TM_F_BW) |
336 |
for (x = 0; x < *xp; x++) |
337 |
*rp++ = normbright(scan[x]); |
338 |
else |
339 |
for (x = 0; x < *xp; x++) { |
340 |
*rp++ = scan[x][RED]; |
341 |
*rp++ = scan[x][GRN]; |
342 |
*rp++ = scan[x][BLU]; |
343 |
} |
344 |
} |
345 |
free((MEM_PTR)scan); |
346 |
pclose(infp); |
347 |
returnOK; |
348 |
} |
349 |
#endif |
350 |
|
351 |
|
352 |
int /* map a Radiance picture */ |
353 |
tmMapPicture(psp, xp, yp, flags, monpri, gamval, Lddyn, Ldmax, fname, fp) |
354 |
BYTE **psp; |
355 |
int *xp, *yp; |
356 |
int flags; |
357 |
RGBPRIMP monpri; |
358 |
double gamval, Lddyn, Ldmax; |
359 |
char *fname; |
360 |
FILE *fp; |
361 |
{ |
362 |
char *funcName = fname==NULL ? "tmMapPicture" : fname; |
363 |
TMstruct *tms; |
364 |
BYTE *cp; |
365 |
TMbright *lp; |
366 |
int err; |
367 |
/* check arguments */ |
368 |
if ((psp == NULL) | (xp == NULL) | (yp == NULL) | (monpri == NULL) | |
369 |
((fname == NULL) & (fp == TM_GETFILE))) |
370 |
returnErr(TM_E_ILLEGAL); |
371 |
/* set defaults */ |
372 |
if (gamval < MINGAM) gamval = DEFGAM; |
373 |
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN; |
374 |
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX; |
375 |
if (flags & TM_F_BW) monpri = stdprims; |
376 |
#ifdef PCOND |
377 |
/* check for pcond run */ |
378 |
if (fp == TM_GETFILE && flags & TM_F_UNIMPL) |
379 |
return( dopcond(psp, xp, yp, flags, |
380 |
monpri, gamval, Lddyn, Ldmax, fname) ); |
381 |
#endif |
382 |
/* initialize tone mapping */ |
383 |
if ((tms = tmInit(flags, monpri, gamval)) == NULL) |
384 |
returnErr(TM_E_NOMEM); |
385 |
/* load & convert picture */ |
386 |
err = tmLoadPicture(tms, &lp, (flags&TM_F_BW) ? TM_NOCHROMP : &cp, |
387 |
xp, yp, fname, fp); |
388 |
if (err != TM_E_OK) { |
389 |
tmDone(tms); |
390 |
return(err); |
391 |
} |
392 |
/* allocate space for result */ |
393 |
if (flags & TM_F_BW) { |
394 |
*psp = (BYTE *)malloc(sizeof(BYTE) * *xp * *yp); |
395 |
if (*psp == NULL) { |
396 |
free((MEM_PTR)lp); |
397 |
tmDone(tms); |
398 |
returnErr(TM_E_NOMEM); |
399 |
} |
400 |
cp = TM_NOCHROM; |
401 |
} else |
402 |
*psp = cp; |
403 |
/* compute color mapping */ |
404 |
err = tmAddHisto(tms, lp, *xp * *yp, 1); |
405 |
if (err != TM_E_OK) |
406 |
goto done; |
407 |
err = tmComputeMapping(tms, gamval, Lddyn, Ldmax); |
408 |
if (err != TM_E_OK) |
409 |
goto done; |
410 |
/* map colors */ |
411 |
err = tmMapPixels(tms, *psp, lp, cp, *xp * *yp); |
412 |
|
413 |
done: /* clean up */ |
414 |
free((MEM_PTR)lp); |
415 |
tmDone(tms); |
416 |
if (err != TM_E_OK) { /* free memory on error */ |
417 |
free((MEM_PTR)*psp); |
418 |
*psp = NULL; |
419 |
returnErr(err); |
420 |
} |
421 |
returnOK; |
422 |
} |
423 |
|
424 |
|
425 |
static void |
426 |
colrNewSpace(tms) /* color space changed for tone mapping */ |
427 |
register TMstruct *tms; |
428 |
{ |
429 |
register COLRDATA *cd; |
430 |
double d; |
431 |
int i, j; |
432 |
|
433 |
cd = (COLRDATA *)tms->pd[colrReg]; |
434 |
for (i = 3; i--; ) |
435 |
cd->clfb[i] = 0x1000*tms->clf[i] + .5; |
436 |
cd->inpsfb = tmCvLuminance(tms->inpsf); |
437 |
for (i = 3; i--; ) |
438 |
for (j = 3; j--; ) { |
439 |
d = tms->cmat[i][j] / tms->inpsf; |
440 |
cd->cmatb[i][j] = 0x10000*d + (d<0. ? -.5 : .5); |
441 |
} |
442 |
} |
443 |
|
444 |
|
445 |
static MEM_PTR |
446 |
colrInit(tms) /* initialize private data for tone mapping */ |
447 |
register TMstruct *tms; |
448 |
{ |
449 |
register COLRDATA *cd; |
450 |
register int i; |
451 |
/* allocate our data */ |
452 |
cd = (COLRDATA *)malloc(sizeof(COLRDATA)); |
453 |
if (cd == NULL) |
454 |
return(NULL); |
455 |
tms->pd[colrReg] = (MEM_PTR)cd; |
456 |
/* compute gamma table */ |
457 |
for (i = GAMTSZ; i--; ) |
458 |
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam); |
459 |
/* compute color and scale factors */ |
460 |
colrNewSpace(tms); |
461 |
return((MEM_PTR)cd); |
462 |
} |