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/* Copyright (c) 1997 Regents of the University of California */ |
2 |
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|
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#ifndef lint |
2 |
< |
static char SCCSid[] = "$SunId$ LBL"; |
2 |
> |
static const char RCSid[] = "$Id$"; |
3 |
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#endif |
6 |
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|
4 |
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/* |
5 |
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* Tone mapping functions. |
6 |
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* See tonemap.h for detailed function descriptions. |
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* Added von Kries white-balance calculations 10/01 (GW). |
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* |
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* Externals declared in tonemap.h |
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*/ |
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|
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#include "copyright.h" |
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|
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#include <stdio.h> |
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#include <math.h> |
16 |
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#include "tmprivat.h" |
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char *tmLastFunction; /* error-generating function name */ |
29 |
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|
30 |
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|
29 |
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int |
30 |
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tmErrorReturn(func, err) /* error return (with message) */ |
31 |
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char *func; |
32 |
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int err; |
33 |
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{ |
34 |
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tmLastFunction = func; |
35 |
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tmLastError = err; |
36 |
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if (tmTop != NULL && tmTop->flags & TM_F_NOSTDERR) |
37 |
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return(err); |
38 |
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fputs(func, stderr); |
39 |
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fputs(": ", stderr); |
40 |
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fputs(tmErrorMessage[err], stderr); |
41 |
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fputs("!\n", stderr); |
42 |
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return(err); |
43 |
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} |
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|
45 |
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|
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struct tmStruct * |
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tmInit(flags, monpri, gamval) /* initialize new tone mapping */ |
33 |
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int flags; |
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RGBPRIMP monpri; |
35 |
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double gamval; |
36 |
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{ |
52 |
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static char funcName[] = "tmInit"; |
37 |
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COLORMAT cmat; |
38 |
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register struct tmStruct *tmnew; |
39 |
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register int i; |
43 |
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return(NULL); |
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|
45 |
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tmnew->flags = flags & ~TM_F_UNIMPL; |
46 |
+ |
if (tmnew->flags & TM_F_BW) |
47 |
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tmnew->flags &= ~TM_F_MESOPIC; |
48 |
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/* set monitor transform */ |
49 |
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if (monpri == NULL || monpri == stdprims || tmnew->flags & TM_F_BW) { |
50 |
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tmnew->monpri = stdprims; |
52 |
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tmnew->clf[GRN] = rgb2xyzmat[1][1]; |
53 |
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tmnew->clf[BLU] = rgb2xyzmat[1][2]; |
54 |
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} else { |
55 |
< |
comprgb2xyzmat(cmat, tmnew->monpri=monpri); |
55 |
> |
comprgb2xyzWBmat(cmat, tmnew->monpri=monpri); |
56 |
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tmnew->clf[RED] = cmat[1][0]; |
57 |
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tmnew->clf[GRN] = cmat[1][1]; |
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tmnew->clf[BLU] = cmat[1][2]; |
72 |
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tmnew->inpsf = WHTEFFICACY; |
73 |
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tmnew->cmat[0][1] = tmnew->cmat[0][2] = tmnew->cmat[1][0] = |
74 |
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tmnew->cmat[1][2] = tmnew->cmat[2][0] = tmnew->cmat[2][1] = 0.; |
75 |
< |
tmnew->hbrmin = tmnew->hbrmax = 0; |
75 |
> |
tmnew->hbrmin = 10; tmnew->hbrmax = -10; |
76 |
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tmnew->histo = NULL; |
77 |
< |
tmnew->mbrmin = tmnew->mbrmax = 0; |
77 |
> |
tmnew->mbrmin = 10; tmnew->mbrmax = -10; |
78 |
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tmnew->lumap = NULL; |
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/* zero private data */ |
80 |
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for (i = TM_MAXPKG; i--; ) |
109 |
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tmTop->clf[CIEX] = tmTop->clf[CIEZ] = 0.; |
110 |
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tmTop->clf[CIEY] = 1.; |
111 |
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} else { |
112 |
< |
comprgb2xyzmat(tmTop->cmat, tmTop->monpri); |
112 |
> |
comprgb2xyzWBmat(tmTop->cmat, tmTop->monpri); |
113 |
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tmTop->clf[RED] = tmTop->cmat[1][0]; |
114 |
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tmTop->clf[GRN] = tmTop->cmat[1][1]; |
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tmTop->clf[BLU] = tmTop->cmat[1][2]; |
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tmTop->cmat[1][2] = tmTop->cmat[2][0] = tmTop->cmat[2][1] = 0.; |
121 |
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|
122 |
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} else if (tmTop->inppri == TM_XYZPRIM) /* input is XYZ */ |
123 |
< |
compxyz2rgbmat(tmTop->cmat, tmTop->monpri); |
123 |
> |
compxyz2rgbWBmat(tmTop->cmat, tmTop->monpri); |
124 |
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|
125 |
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else { /* input is RGB */ |
126 |
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if (tmTop->inppri != tmTop->monpri && |
127 |
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PRIMEQ(tmTop->inppri, tmTop->monpri)) |
128 |
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tmTop->inppri = tmTop->monpri; /* no xform */ |
129 |
< |
comprgb2rgbmat(tmTop->cmat, tmTop->inppri, tmTop->monpri); |
129 |
> |
comprgb2rgbWBmat(tmTop->cmat, tmTop->inppri, tmTop->monpri); |
130 |
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} |
131 |
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for (i = 0; i < 3; i++) |
132 |
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for (j = 0; j < 3; j++) |
164 |
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int len; |
165 |
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{ |
166 |
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static char funcName[] = "tmCvColors"; |
167 |
< |
static COLOR csmall = {1e-6, 1e-6, 1e-6}; |
167 |
> |
static COLOR csmall = {.5*MINLUM, .5*MINLUM, .5*MINLUM}; |
168 |
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COLOR cmon; |
169 |
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double lum, slum; |
170 |
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register double d; |
172 |
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|
173 |
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if (tmTop == NULL) |
174 |
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returnErr(TM_E_TMINVAL); |
175 |
< |
if (ls == NULL | scan == NULL | len <= 0) |
175 |
> |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
176 |
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returnErr(TM_E_ILLEGAL); |
177 |
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for (i = len; i--; ) { |
178 |
< |
if (tmNeedMatrix(tmTop)) /* get monitor RGB */ |
178 |
> |
if (tmNeedMatrix(tmTop)) { /* get monitor RGB */ |
179 |
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colortrans(cmon, tmTop->cmat, scan[i]); |
180 |
< |
else { |
180 |
> |
} else { |
181 |
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cmon[RED] = tmTop->inpsf*scan[i][RED]; |
182 |
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cmon[GRN] = tmTop->inpsf*scan[i][GRN]; |
183 |
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cmon[BLU] = tmTop->inpsf*scan[i][BLU]; |
234 |
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|
235 |
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|
236 |
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int |
237 |
+ |
tmCvGrays(ls, scan, len) /* convert float gray values */ |
238 |
+ |
TMbright *ls; |
239 |
+ |
float *scan; |
240 |
+ |
int len; |
241 |
+ |
{ |
242 |
+ |
static char funcName[] = "tmCvGrays"; |
243 |
+ |
register double d; |
244 |
+ |
register int i; |
245 |
+ |
|
246 |
+ |
if (tmTop == NULL) |
247 |
+ |
returnErr(TM_E_TMINVAL); |
248 |
+ |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
249 |
+ |
returnErr(TM_E_ILLEGAL); |
250 |
+ |
for (i = len; i--; ) |
251 |
+ |
if (scan[i] <= TM_NOLUM) { |
252 |
+ |
ls[i] = TM_NOBRT; /* bogus value */ |
253 |
+ |
} else { |
254 |
+ |
d = TM_BRTSCALE*log(scan[i]); /* encode it */ |
255 |
+ |
ls[i] = d>0. ? (int)(d+.5) : (int)(d-.5); |
256 |
+ |
} |
257 |
+ |
returnOK; |
258 |
+ |
} |
259 |
+ |
|
260 |
+ |
|
261 |
+ |
int |
262 |
|
tmAddHisto(ls, len, wt) /* add values to histogram */ |
263 |
|
register TMbright *ls; |
264 |
|
int len; |
265 |
|
int wt; |
266 |
|
{ |
267 |
|
static char funcName[] = "tmAddHisto"; |
268 |
< |
int sum, oldorig, oldlen, horig, hlen; |
268 |
> |
int oldorig=0, oldlen, horig, hlen; |
269 |
|
register int i, j; |
270 |
|
|
260 |
– |
if (len <= 0) |
261 |
– |
returnErr(TM_E_ILLEGAL); |
271 |
|
if (tmTop == NULL) |
272 |
|
returnErr(TM_E_TMINVAL); |
273 |
+ |
if (len < 0) |
274 |
+ |
returnErr(TM_E_ILLEGAL); |
275 |
+ |
if (len == 0) |
276 |
+ |
returnOK; |
277 |
|
/* first, grow limits */ |
278 |
|
if (tmTop->histo == NULL) { |
279 |
|
for (i = len; i-- && ls[i] < MINBRT; ) |
338 |
|
} |
339 |
|
|
340 |
|
|
341 |
+ |
static int |
342 |
+ |
tmNewMap() |
343 |
+ |
{ |
344 |
+ |
if (tmTop->lumap != NULL && (tmTop->mbrmax - tmTop->mbrmin) != |
345 |
+ |
(tmTop->hbrmax - tmTop->hbrmin)) { |
346 |
+ |
free((MEM_PTR)tmTop->lumap); |
347 |
+ |
tmTop->lumap = NULL; |
348 |
+ |
} |
349 |
+ |
tmTop->mbrmin = tmTop->hbrmin; |
350 |
+ |
tmTop->mbrmax = tmTop->hbrmax; |
351 |
+ |
if (tmTop->mbrmin > tmTop->mbrmax) |
352 |
+ |
return 0; |
353 |
+ |
if (tmTop->lumap == NULL) |
354 |
+ |
tmTop->lumap = (unsigned short *)malloc(sizeof(unsigned short)* |
355 |
+ |
(tmTop->mbrmax-tmTop->mbrmin+1)); |
356 |
+ |
return(tmTop->lumap != NULL); |
357 |
+ |
} |
358 |
+ |
|
359 |
+ |
|
360 |
|
int |
361 |
+ |
tmFixedMapping(expmult, gamval) |
362 |
+ |
double expmult; |
363 |
+ |
double gamval; |
364 |
+ |
{ |
365 |
+ |
static char funcName[] = "tmFixedMapping"; |
366 |
+ |
double d; |
367 |
+ |
register int i; |
368 |
+ |
|
369 |
+ |
if (!tmNewMap()) |
370 |
+ |
returnErr(TM_E_NOMEM); |
371 |
+ |
if (expmult <= .0) |
372 |
+ |
expmult = 1.; |
373 |
+ |
if (gamval < MINGAM) |
374 |
+ |
gamval = tmTop->mongam; |
375 |
+ |
d = log(expmult/tmTop->inpsf); |
376 |
+ |
for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) |
377 |
+ |
tmTop->lumap[i] = 256. * exp( |
378 |
+ |
( d + (tmTop->mbrmin+i)*(1./TM_BRTSCALE) ) |
379 |
+ |
/ gamval ); |
380 |
+ |
returnOK; |
381 |
+ |
} |
382 |
+ |
|
383 |
+ |
|
384 |
+ |
int |
385 |
|
tmComputeMapping(gamval, Lddyn, Ldmax) |
386 |
|
double gamval; |
387 |
|
double Lddyn; |
390 |
|
static char funcName[] = "tmComputeMapping"; |
391 |
|
int *histo; |
392 |
|
float *cumf; |
393 |
< |
int brt0, histlen, histot, threshold, ceiling, trimmings; |
393 |
> |
int brt0, histlen, threshold, ceiling, trimmings; |
394 |
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double logLddyn, Ldmin, Ldavg, Lwavg, Tr, Lw, Ld; |
395 |
< |
int4 sum; |
395 |
> |
int32 histot; |
396 |
> |
double sum; |
397 |
|
register double d; |
398 |
|
register int i, j; |
399 |
|
|
417 |
|
histot += tmTop->histo[i]; |
418 |
|
sum += (j -= HISTEP) * tmTop->histo[i]; |
419 |
|
} |
420 |
< |
threshold = histot*.025 + .5; |
420 |
> |
threshold = histot*0.005 + .5; |
421 |
|
if (threshold < 4) |
422 |
|
returnErr(TM_E_TMFAIL); |
423 |
|
Lwavg = tmLuminance( (double)sum / histot ); |
424 |
< |
if (!(tmTop->flags & TM_F_LINEAR)) { /* clamp histogram */ |
425 |
< |
histo = (int *)malloc(histlen*sizeof(int)); |
426 |
< |
cumf = (float *)malloc((histlen+1)*sizeof(float)); |
427 |
< |
if (histo == NULL | cumf == NULL) |
428 |
< |
returnErr(TM_E_NOMEM); |
429 |
< |
for (i = histlen; i--; ) /* make malleable copy */ |
430 |
< |
histo[i] = tmTop->histo[i]; |
431 |
< |
do { /* iterate to solution */ |
432 |
< |
sum = 0; /* cumulative probability */ |
433 |
< |
for (i = 0; i < histlen; i++) { |
434 |
< |
cumf[i] = (double)sum/histot; |
435 |
< |
sum += histo[i]; |
424 |
> |
/* allocate space for mapping */ |
425 |
> |
if (!tmNewMap()) |
426 |
> |
returnErr(TM_E_NOMEM); |
427 |
> |
/* use linear tone mapping? */ |
428 |
> |
if (tmTop->flags & TM_F_LINEAR) |
429 |
> |
goto linearmap; |
430 |
> |
/* clamp histogram */ |
431 |
> |
histo = (int *)malloc(histlen*sizeof(int)); |
432 |
> |
cumf = (float *)malloc((histlen+2)*sizeof(float)); |
433 |
> |
if ((histo == NULL) | (cumf == NULL)) |
434 |
> |
returnErr(TM_E_NOMEM); |
435 |
> |
cumf[histlen+1] = 1.; /* guard for assignment code */ |
436 |
> |
for (i = histlen; i--; ) /* make malleable copy */ |
437 |
> |
histo[i] = tmTop->histo[i]; |
438 |
> |
do { /* iterate to solution */ |
439 |
> |
sum = 0; /* cumulative probability */ |
440 |
> |
for (i = 0; i < histlen; i++) { |
441 |
> |
cumf[i] = (double)sum/histot; |
442 |
> |
sum += histo[i]; |
443 |
> |
} |
444 |
> |
cumf[histlen] = 1.; |
445 |
> |
Tr = histot * (double)(tmTop->hbrmax - tmTop->hbrmin) / |
446 |
> |
((double)histlen*TM_BRTSCALE) / logLddyn; |
447 |
> |
ceiling = Tr + 1.; |
448 |
> |
trimmings = 0; /* clip to envelope */ |
449 |
> |
for (i = histlen; i--; ) { |
450 |
> |
if (tmTop->flags & TM_F_HCONTR) { |
451 |
> |
Lw = tmLuminance(brt0 + i*HISTEP); |
452 |
> |
Ld = Ldmin * exp( logLddyn * |
453 |
> |
.5*(cumf[i]+cumf[i+1]) ); |
454 |
> |
ceiling = Tr * (htcontrs(Ld) * Lw) / |
455 |
> |
(htcontrs(Lw) * Ld) + 1.; |
456 |
|
} |
457 |
< |
cumf[i] = 1.; |
458 |
< |
Tr = histot * (double)(tmTop->hbrmax - tmTop->hbrmin) / |
459 |
< |
((double)histlen*TM_BRTSCALE) / logLddyn; |
383 |
< |
ceiling = Tr + 1.; |
384 |
< |
trimmings = 0; /* clip to envelope */ |
385 |
< |
for (i = histlen; i--; ) { |
386 |
< |
if (tmTop->flags & TM_F_HCONTR) { |
387 |
< |
Lw = tmLuminance(brt0 + i*HISTEP); |
388 |
< |
Ld = Ldmin * exp( logLddyn * |
389 |
< |
.5*(cumf[i]+cumf[i+1]) ); |
390 |
< |
ceiling = Tr * (htcontrs(Ld) * Lw) / |
391 |
< |
(htcontrs(Lw) * Ld) + 1.; |
392 |
< |
} |
393 |
< |
if (histo[i] > ceiling) { |
394 |
< |
trimmings += histo[i] - ceiling; |
395 |
< |
histo[i] = ceiling; |
396 |
< |
} |
457 |
> |
if (histo[i] > ceiling) { |
458 |
> |
trimmings += histo[i] - ceiling; |
459 |
> |
histo[i] = ceiling; |
460 |
|
} |
398 |
– |
} while ((histot -= trimmings) > threshold && |
399 |
– |
trimmings > threshold); |
400 |
– |
} |
401 |
– |
/* allocate luminance map */ |
402 |
– |
if (tmTop->lumap != NULL) |
403 |
– |
free((MEM_PTR)tmTop->lumap); |
404 |
– |
tmTop->mbrmin = tmTop->hbrmin; |
405 |
– |
tmTop->mbrmax = tmTop->hbrmax; |
406 |
– |
tmTop->lumap = (unsigned short *)malloc( |
407 |
– |
(tmTop->mbrmax-tmTop->mbrmin+1)*sizeof(unsigned short) ); |
408 |
– |
if (tmTop->lumap == NULL) |
409 |
– |
returnErr(TM_E_NOMEM); |
410 |
– |
if (tmTop->flags & TM_F_LINEAR || histot <= threshold) { |
411 |
– |
/* linear tone mapping */ |
412 |
– |
if (tmTop->flags & TM_F_HCONTR) |
413 |
– |
d = htcontrs(Ldavg) / htcontrs(Lwavg); |
414 |
– |
else |
415 |
– |
d = Ldavg / Lwavg; |
416 |
– |
d = log(d/Ldmax); |
417 |
– |
for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) |
418 |
– |
tmTop->lumap[i] = 256. * exp( |
419 |
– |
( d + (tmTop->mbrmin+i)/(double)TM_BRTSCALE ) |
420 |
– |
/ gamval ); |
421 |
– |
} else { |
422 |
– |
/* histogram adjustment */ |
423 |
– |
for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) { |
424 |
– |
j = d = (double)i/(tmTop->mbrmax-tmTop->mbrmin)*histlen; |
425 |
– |
d -= (double)j; |
426 |
– |
Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1])); |
427 |
– |
d = (Ld - Ldmin)/(Ldmax - Ldmin); |
428 |
– |
tmTop->lumap[i] = 256.*pow(d, 1./gamval); |
461 |
|
} |
462 |
+ |
/* check if we're out of data */ |
463 |
+ |
if ((histot -= trimmings) <= threshold) { |
464 |
+ |
free((MEM_PTR)histo); |
465 |
+ |
free((MEM_PTR)cumf); |
466 |
+ |
goto linearmap; |
467 |
+ |
} |
468 |
+ |
} while (trimmings > threshold); |
469 |
+ |
/* assign tone-mapping */ |
470 |
+ |
for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) { |
471 |
+ |
j = d = (double)i/(tmTop->mbrmax-tmTop->mbrmin)*histlen; |
472 |
+ |
d -= (double)j; |
473 |
+ |
Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1])); |
474 |
+ |
d = (Ld - Ldmin)/(Ldmax - Ldmin); |
475 |
+ |
tmTop->lumap[i] = 256.*pow(d, 1./gamval); |
476 |
|
} |
477 |
< |
if (!(tmTop->flags & TM_F_LINEAR)) { |
478 |
< |
free((MEM_PTR)histo); |
433 |
< |
free((MEM_PTR)cumf); |
434 |
< |
} |
477 |
> |
free((MEM_PTR)histo); /* clean up and return */ |
478 |
> |
free((MEM_PTR)cumf); |
479 |
|
returnOK; |
480 |
+ |
linearmap: /* linear tone-mapping */ |
481 |
+ |
if (tmTop->flags & TM_F_HCONTR) |
482 |
+ |
d = htcontrs(Ldavg) / htcontrs(Lwavg); |
483 |
+ |
else |
484 |
+ |
d = Ldavg / Lwavg; |
485 |
+ |
return(tmFixedMapping(tmTop->inpsf*d/Ldmax, gamval)); |
486 |
|
} |
487 |
|
|
488 |
|
|
494 |
|
int len; |
495 |
|
{ |
496 |
|
static char funcName[] = "tmMapPixels"; |
497 |
< |
register int4 li, pv; |
497 |
> |
register int32 li, pv; |
498 |
|
|
499 |
|
if (tmTop == NULL || tmTop->lumap == NULL) |
500 |
|
returnErr(TM_E_TMINVAL); |
501 |
< |
if (ps == NULL | ls == NULL | len <= 0) |
501 |
> |
if ((ps == NULL) | (ls == NULL) | (len < 0)) |
502 |
|
returnErr(TM_E_ILLEGAL); |
503 |
|
while (len--) { |
504 |
< |
if ((li = *ls++) < tmTop->mbrmin) |
505 |
< |
li = tmTop->mbrmin; |
506 |
< |
else if (li > tmTop->mbrmax) |
507 |
< |
li = tmTop->mbrmax; |
508 |
< |
li = tmTop->lumap[li - tmTop->mbrmin]; |
504 |
> |
if ((li = *ls++) < tmTop->mbrmin) { |
505 |
> |
li = 0; |
506 |
> |
} else { |
507 |
> |
if (li > tmTop->mbrmax) |
508 |
> |
li = tmTop->mbrmax; |
509 |
> |
li = tmTop->lumap[li - tmTop->mbrmin]; |
510 |
> |
} |
511 |
|
if (cs == TM_NOCHROM) |
512 |
|
*ps++ = li>255 ? 255 : li; |
513 |
|
else { |
540 |
|
{ |
541 |
|
register struct tmStruct *tms2; |
542 |
|
/* special cases first */ |
543 |
< |
if (tms == NULL | tmTop == NULL) |
543 |
> |
if ((tms == NULL) | (tmTop == NULL)) |
544 |
|
return(0); |
545 |
|
if (tms == tmTop) { |
546 |
|
tmTop = tms->tmprev; |
633 |
|
if (tms->pd[i] != NULL) |
634 |
|
(*tmPkg[i]->Free)(tms->pd[i]); |
635 |
|
free((MEM_PTR)tms); /* free basic structure */ |
636 |
+ |
} |
637 |
+ |
|
638 |
+ |
/******************** Shared but Private library routines *********************/ |
639 |
+ |
|
640 |
+ |
BYTE tmMesofact[BMESUPPER-BMESLOWER]; |
641 |
+ |
|
642 |
+ |
void |
643 |
+ |
tmMkMesofact() /* build mesopic lookup factor table */ |
644 |
+ |
{ |
645 |
+ |
register int i; |
646 |
+ |
|
647 |
+ |
if (tmMesofact[BMESUPPER-BMESLOWER-1]) |
648 |
+ |
return; |
649 |
+ |
|
650 |
+ |
for (i = BMESLOWER; i < BMESUPPER; i++) |
651 |
+ |
tmMesofact[i-BMESLOWER] = 256. * |
652 |
+ |
(tmLuminance(i) - LMESLOWER) / |
653 |
+ |
(LMESUPPER - LMESLOWER); |
654 |
+ |
} |
655 |
+ |
|
656 |
+ |
|
657 |
+ |
int |
658 |
+ |
tmErrorReturn(func, err) /* error return (with message) */ |
659 |
+ |
char *func; |
660 |
+ |
int err; |
661 |
+ |
{ |
662 |
+ |
tmLastFunction = func; |
663 |
+ |
tmLastError = err; |
664 |
+ |
if (tmTop != NULL && tmTop->flags & TM_F_NOSTDERR) |
665 |
+ |
return(err); |
666 |
+ |
fputs(func, stderr); |
667 |
+ |
fputs(": ", stderr); |
668 |
+ |
fputs(tmErrorMessage[err], stderr); |
669 |
+ |
fputs("!\n", stderr); |
670 |
+ |
return(err); |
671 |
|
} |