12 |
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#include "copyright.h" |
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|
14 |
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#include <stdio.h> |
15 |
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#include <stdlib.h> |
16 |
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#include <math.h> |
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#include <string.h> |
18 |
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#include "tmprivat.h" |
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#include "tmerrmsg.h" |
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|
24 |
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struct tmPackage *tmPkg[TM_MAXPKG]; |
25 |
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int tmNumPkgs = 0; /* number of registered packages */ |
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|
27 |
+ |
/* luminance->brightness lookup */ |
28 |
+ |
static TMbright *tmFloat2BrtLUT = NULL; |
29 |
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|
30 |
+ |
#define tmCvLumLUfp(pf) tmFloat2BrtLUT[*(int32 *)(pf) >> 15] |
31 |
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|
32 |
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|
33 |
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TMstruct * |
34 |
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tmInit( /* initialize new tone mapping */ |
35 |
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int flags, |
55 |
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tmnew->clf[GRN] = rgb2xyzmat[1][1]; |
56 |
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tmnew->clf[BLU] = rgb2xyzmat[1][2]; |
57 |
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} else { |
58 |
< |
comprgb2xyzWBmat(cmat, tmnew->monpri=monpri); |
58 |
> |
comprgb2xyzmat(cmat, tmnew->monpri=monpri); |
59 |
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tmnew->clf[RED] = cmat[1][0]; |
60 |
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tmnew->clf[GRN] = cmat[1][1]; |
61 |
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tmnew->clf[BLU] = cmat[1][2]; |
67 |
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tmnew->mongam = gamval; |
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/* set color divisors */ |
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for (i = 0; i < 3; i++) |
70 |
< |
tmnew->cdiv[i] = 256.*pow(tmnew->clf[i], 1./tmnew->mongam); |
70 |
> |
tmnew->cdiv[i] = TM_BRES*pow(tmnew->clf[i], 1./tmnew->mongam); |
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|
72 |
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/* set input transform */ |
73 |
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tmnew->inppri = tmnew->monpri; |
118 |
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tms->clf[CIEX] = tms->clf[CIEZ] = 0.; |
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tms->clf[CIEY] = 1.; |
120 |
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} else { |
121 |
< |
comprgb2xyzWBmat(tms->cmat, tms->monpri); |
121 |
> |
comprgb2xyzmat(tms->cmat, tms->monpri); |
122 |
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tms->clf[RED] = tms->cmat[1][0]; |
123 |
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tms->clf[GRN] = tms->cmat[1][1]; |
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tms->clf[BLU] = tms->cmat[1][2]; |
135 |
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if (tms->inppri != tms->monpri && |
136 |
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PRIMEQ(tms->inppri, tms->monpri)) |
137 |
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tms->inppri = tms->monpri; /* no xform */ |
138 |
< |
comprgb2rgbWBmat(tms->cmat, tms->inppri, tms->monpri); |
138 |
> |
if (!comprgb2rgbWBmat(tms->cmat, tms->inppri, tms->monpri)) |
139 |
> |
returnErr(TM_E_ILLEGAL); |
140 |
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} |
141 |
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for (i = 0; i < 3; i++) |
142 |
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for (j = 0; j < 3; j++) |
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tms->cmat[i][j] *= tms->inpsf; |
144 |
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/* set color divisors */ |
145 |
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for (i = 0; i < 3; i++) |
146 |
< |
if (tms->clf[i] > .001) |
147 |
< |
tms->cdiv[i] = |
140 |
< |
256.*pow(tms->clf[i], 1./tms->mongam); |
141 |
< |
else |
142 |
< |
tms->cdiv[i] = 1; |
146 |
> |
tms->cdiv[i] = TM_BRES*pow(tms->clf[i] < .001 ? .001 : |
147 |
> |
tms->clf[i], 1./tms->mongam); |
148 |
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/* notify packages */ |
149 |
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for (i = tmNumPkgs; i--; ) |
150 |
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if (tms->pd[i] != NULL && tmPkg[i]->NewSpace != NULL) |
154 |
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|
155 |
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|
156 |
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void |
157 |
< |
tmClearHisto( /* clear current histogram */ |
157 |
> |
tmClearHisto( /* clear current histogram */ |
158 |
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TMstruct *tms |
159 |
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) |
160 |
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{ |
165 |
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} |
166 |
|
|
167 |
|
|
168 |
+ |
TMbright |
169 |
+ |
tmCvLuminance( /* convert a single luminance */ |
170 |
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double lum |
171 |
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) |
172 |
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{ |
173 |
+ |
double d; |
174 |
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|
175 |
+ |
#ifdef isfinite |
176 |
+ |
if (!isfinite(lum) || lum <= TM_NOLUM) |
177 |
+ |
#else |
178 |
+ |
if (lum <= TM_NOLUM) |
179 |
+ |
#endif |
180 |
+ |
return(TM_NOBRT); |
181 |
+ |
d = TM_BRTSCALE*log(lum); |
182 |
+ |
return((TMbright)(d + .5 - (d < 0.))); |
183 |
+ |
} |
184 |
+ |
|
185 |
+ |
|
186 |
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int |
187 |
+ |
tmCvLums( /* convert luminances using lookup */ |
188 |
+ |
TMbright *ls, |
189 |
+ |
float *scan, |
190 |
+ |
int len |
191 |
+ |
) |
192 |
+ |
{ |
193 |
+ |
if (tmFloat2BrtLUT == NULL) { /* initialize lookup table */ |
194 |
+ |
int32 i; |
195 |
+ |
tmFloat2BrtLUT = (TMbright *)malloc(sizeof(TMbright)*0x10000); |
196 |
+ |
if (tmFloat2BrtLUT == NULL) |
197 |
+ |
return(TM_E_NOMEM); |
198 |
+ |
for (i = 0; i < 0x10000; i++) { |
199 |
+ |
int32 l = (i<<1 | 1) << 14; |
200 |
+ |
#ifndef isfinite |
201 |
+ |
if ((l & 0x7f800000) == 0x7f800000) |
202 |
+ |
tmFloat2BrtLUT[i] = TM_NOBRT; |
203 |
+ |
else |
204 |
+ |
#endif |
205 |
+ |
tmFloat2BrtLUT[i] = tmCvLuminance(*(float *)&l); |
206 |
+ |
} |
207 |
+ |
} |
208 |
+ |
if (len <= 0) |
209 |
+ |
return(TM_E_OK); |
210 |
+ |
if ((ls == NULL) | (scan == NULL)) |
211 |
+ |
return(TM_E_ILLEGAL); |
212 |
+ |
while (len--) { |
213 |
+ |
if (*scan <= TM_NOLUM) { |
214 |
+ |
*ls++ = TM_NOBRT; |
215 |
+ |
++scan; |
216 |
+ |
continue; |
217 |
+ |
} |
218 |
+ |
*ls++ = tmCvLumLUfp(scan++); |
219 |
+ |
} |
220 |
+ |
return(TM_E_OK); |
221 |
+ |
} |
222 |
+ |
|
223 |
+ |
|
224 |
+ |
int |
225 |
+ |
tmCvGrays( /* convert float gray values */ |
226 |
+ |
TMstruct *tms, |
227 |
+ |
TMbright *ls, |
228 |
+ |
float *scan, |
229 |
+ |
int len |
230 |
+ |
) |
231 |
+ |
{ |
232 |
+ |
static const char funcName[] = "tmCvGrays"; |
233 |
+ |
int i; |
234 |
+ |
|
235 |
+ |
if (tms == NULL) |
236 |
+ |
returnErr(TM_E_TMINVAL); |
237 |
+ |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
238 |
+ |
returnErr(TM_E_ILLEGAL); |
239 |
+ |
if (tmFloat2BrtLUT == NULL) /* initialize */ |
240 |
+ |
tmCvLums(NULL, NULL, 0); |
241 |
+ |
for (i = len; i--; ) { |
242 |
+ |
float lum = tms->inpsf * scan[i]; |
243 |
+ |
if (lum <= TM_NOLUM) |
244 |
+ |
ls[i] = TM_NOBRT; |
245 |
+ |
else |
246 |
+ |
ls[i] = tmCvLumLUfp(&lum); |
247 |
+ |
} |
248 |
+ |
returnOK; |
249 |
+ |
} |
250 |
+ |
|
251 |
+ |
|
252 |
+ |
int |
253 |
|
tmCvColors( /* convert float colors */ |
254 |
|
TMstruct *tms, |
255 |
|
TMbright *ls, |
256 |
< |
BYTE *cs, |
256 |
> |
uby8 *cs, |
257 |
|
COLOR *scan, |
258 |
|
int len |
259 |
|
) |
260 |
|
{ |
261 |
|
static const char funcName[] = "tmCvColors"; |
262 |
< |
static COLOR csmall = {.5*MINLUM, .5*MINLUM, .5*MINLUM}; |
174 |
< |
static BYTE gamtab[1024]; |
262 |
> |
static uby8 gamtab[1024]; |
263 |
|
static double curgam = .0; |
264 |
|
COLOR cmon; |
265 |
< |
double lum, slum; |
178 |
< |
double d; |
265 |
> |
float lum, slum, d; |
266 |
|
int i; |
267 |
|
|
268 |
|
if (tms == NULL) |
269 |
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returnErr(TM_E_TMINVAL); |
270 |
|
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
271 |
|
returnErr(TM_E_ILLEGAL); |
272 |
+ |
if (tmFloat2BrtLUT == NULL) /* initialize */ |
273 |
+ |
tmCvLums(NULL, NULL, 0); |
274 |
|
if (cs != TM_NOCHROM && fabs(tms->mongam - curgam) > .02) { |
275 |
|
curgam = tms->mongam; /* (re)build table */ |
276 |
|
for (i = 1024; i--; ) |
284 |
|
cmon[GRN] = tms->inpsf*scan[i][GRN]; |
285 |
|
cmon[BLU] = tms->inpsf*scan[i][BLU]; |
286 |
|
} |
287 |
+ |
#ifdef isfinite |
288 |
+ |
if (!isfinite(cmon[RED]) || cmon[RED] < .0f) cmon[RED] = .0f; |
289 |
+ |
if (!isfinite(cmon[GRN]) || cmon[GRN] < .0f) cmon[GRN] = .0f; |
290 |
+ |
if (!isfinite(cmon[BLU]) || cmon[BLU] < .0f) cmon[BLU] = .0f; |
291 |
+ |
#else |
292 |
+ |
if (cmon[RED] < .0f) cmon[RED] = .0f; |
293 |
+ |
if (cmon[GRN] < .0f) cmon[GRN] = .0f; |
294 |
+ |
if (cmon[BLU] < .0f) cmon[BLU] = .0f; |
295 |
+ |
#endif |
296 |
|
/* world luminance */ |
297 |
|
lum = tms->clf[RED]*cmon[RED] + |
298 |
|
tms->clf[GRN]*cmon[GRN] + |
299 |
|
tms->clf[BLU]*cmon[BLU] ; |
300 |
< |
/* check range */ |
301 |
< |
if (clipgamut(cmon, lum, CGAMUT_LOWER, csmall, cwhite)) |
302 |
< |
lum = tms->clf[RED]*cmon[RED] + |
303 |
< |
tms->clf[GRN]*cmon[GRN] + |
304 |
< |
tms->clf[BLU]*cmon[BLU] ; |
207 |
< |
if (lum < MINLUM) { |
208 |
< |
ls[i] = MINBRT-1; /* bogus value */ |
209 |
< |
lum = MINLUM; |
210 |
< |
} else { |
211 |
< |
d = TM_BRTSCALE*log(lum); /* encode it */ |
212 |
< |
ls[i] = d>0. ? (int)(d+.5) : (int)(d-.5); |
213 |
< |
} |
300 |
> |
if (lum <= TM_NOLUM) { /* convert brightness */ |
301 |
> |
lum = cmon[RED] = cmon[GRN] = cmon[BLU] = TM_NOLUM; |
302 |
> |
ls[i] = TM_NOBRT; |
303 |
> |
} else |
304 |
> |
ls[i] = tmCvLumLUfp(&lum); |
305 |
|
if (cs == TM_NOCHROM) /* no color? */ |
306 |
|
continue; |
307 |
|
if (tms->flags & TM_F_MESOPIC && lum < LMESUPPER) { |
308 |
|
slum = scotlum(cmon); /* mesopic adj. */ |
309 |
< |
if (lum < LMESLOWER) |
309 |
> |
if (lum < LMESLOWER) { |
310 |
|
cmon[RED] = cmon[GRN] = cmon[BLU] = slum; |
311 |
< |
else { |
311 |
> |
} else { |
312 |
|
d = (lum - LMESLOWER)/(LMESUPPER - LMESLOWER); |
313 |
|
if (tms->flags & TM_F_BW) |
314 |
|
cmon[RED] = cmon[GRN] = |
315 |
|
cmon[BLU] = d*lum; |
316 |
|
else |
317 |
|
scalecolor(cmon, d); |
318 |
< |
d = (1.-d)*slum; |
318 |
> |
d = (1.f-d)*slum; |
319 |
|
cmon[RED] += d; |
320 |
|
cmon[GRN] += d; |
321 |
|
cmon[BLU] += d; |
324 |
|
cmon[RED] = cmon[GRN] = cmon[BLU] = lum; |
325 |
|
} |
326 |
|
d = tms->clf[RED]*cmon[RED]/lum; |
327 |
< |
cs[3*i ] = d>=.999 ? 255 : gamtab[(int)(1024.*d)]; |
327 |
> |
cs[3*i ] = d>=.999f ? 255 : gamtab[(int)(1024.f*d)]; |
328 |
|
d = tms->clf[GRN]*cmon[GRN]/lum; |
329 |
< |
cs[3*i+1] = d>=.999 ? 255 : gamtab[(int)(1024.*d)]; |
329 |
> |
cs[3*i+1] = d>=.999f ? 255 : gamtab[(int)(1024.f*d)]; |
330 |
|
d = tms->clf[BLU]*cmon[BLU]/lum; |
331 |
< |
cs[3*i+2] = d>=.999 ? 255 : gamtab[(int)(1024.*d)]; |
331 |
> |
cs[3*i+2] = d>=.999f ? 255 : gamtab[(int)(1024.f*d)]; |
332 |
|
} |
333 |
|
returnOK; |
334 |
|
} |
335 |
|
|
336 |
|
|
246 |
– |
TMbright |
247 |
– |
tmCvLuminance( /* convert a single luminance */ |
248 |
– |
double lum |
249 |
– |
) |
250 |
– |
{ |
251 |
– |
double d; |
252 |
– |
|
253 |
– |
if (lum <= TM_NOLUM) |
254 |
– |
return(TM_NOBRT); |
255 |
– |
d = TM_BRTSCALE*log(lum); |
256 |
– |
if (d > 0.) |
257 |
– |
return((TMbright)(d+.5)); |
258 |
– |
return((TMbright)(d-.5)); |
259 |
– |
} |
260 |
– |
|
261 |
– |
|
337 |
|
int |
263 |
– |
tmCvGrays( /* convert float gray values */ |
264 |
– |
TMstruct *tms, |
265 |
– |
TMbright *ls, |
266 |
– |
float *scan, |
267 |
– |
int len |
268 |
– |
) |
269 |
– |
{ |
270 |
– |
static const char funcName[] = "tmCvGrays"; |
271 |
– |
double d; |
272 |
– |
int i; |
273 |
– |
|
274 |
– |
if (tms == NULL) |
275 |
– |
returnErr(TM_E_TMINVAL); |
276 |
– |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
277 |
– |
returnErr(TM_E_ILLEGAL); |
278 |
– |
for (i = len; i--; ) |
279 |
– |
if (scan[i] <= TM_NOLUM) { |
280 |
– |
ls[i] = TM_NOBRT; /* bogus value */ |
281 |
– |
} else { |
282 |
– |
d = TM_BRTSCALE*log(scan[i]); /* encode it */ |
283 |
– |
ls[i] = d>0. ? (int)(d+.5) : (int)(d-.5); |
284 |
– |
} |
285 |
– |
returnOK; |
286 |
– |
} |
287 |
– |
|
288 |
– |
|
289 |
– |
int |
338 |
|
tmAddHisto( /* add values to histogram */ |
339 |
|
TMstruct *tms, |
340 |
|
TMbright *ls, |
361 |
|
tms->hbrmin = tms->hbrmax = ls[i]; |
362 |
|
oldlen = 0; |
363 |
|
} else { |
364 |
< |
oldorig = (tms->hbrmin-MINBRT)/HISTEP; |
365 |
< |
oldlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - oldorig; |
364 |
> |
oldorig = HISTI(tms->hbrmin); |
365 |
> |
oldlen = HISTI(tms->hbrmax) + 1 - oldorig; |
366 |
|
} |
367 |
|
for (i = len; i--; ) { |
368 |
|
if ((j = ls[i]) < MINBRT) |
372 |
|
else if (j > tms->hbrmax) |
373 |
|
tms->hbrmax = j; |
374 |
|
} |
375 |
< |
horig = (tms->hbrmin-MINBRT)/HISTEP; |
376 |
< |
hlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - horig; |
375 |
> |
horig = HISTI(tms->hbrmin); |
376 |
> |
hlen = HISTI(tms->hbrmax) + 1 - horig; |
377 |
|
if (hlen > oldlen) { /* (re)allocate histogram */ |
378 |
< |
int *newhist = (int *)calloc(hlen, sizeof(int)); |
378 |
> |
HIST_TYP *newhist = (HIST_TYP *)calloc(hlen, sizeof(HIST_TYP)); |
379 |
|
if (newhist == NULL) |
380 |
|
returnErr(TM_E_NOMEM); |
381 |
|
if (oldlen) { /* copy and free old */ |
382 |
< |
for (i = oldlen, j = i+oldorig-horig; i; ) |
383 |
< |
newhist[--j] = tms->histo[--i]; |
382 |
> |
memcpy((MEM_PTR)(newhist+(oldorig-horig)), |
383 |
> |
(MEM_PTR)tms->histo, oldlen*sizeof(HIST_TYP)); |
384 |
|
free((MEM_PTR)tms->histo); |
385 |
|
} |
386 |
|
tms->histo = newhist; |
389 |
|
returnOK; |
390 |
|
for (i = len; i--; ) /* add in new counts */ |
391 |
|
if (ls[i] >= MINBRT) |
392 |
< |
tms->histo[ (ls[i]-MINBRT)/HISTEP - horig ] += wt; |
392 |
> |
tms->histo[ HISTI(ls[i]) - horig ] += wt; |
393 |
|
returnOK; |
394 |
|
} |
395 |
|
|
417 |
|
} |
418 |
|
|
419 |
|
|
372 |
– |
static int |
373 |
– |
tmNewMap( /* allocate new tone-mapping array */ |
374 |
– |
TMstruct *tms |
375 |
– |
) |
376 |
– |
{ |
377 |
– |
if (tms->lumap != NULL && (tms->mbrmax - tms->mbrmin) != |
378 |
– |
(tms->hbrmax - tms->hbrmin)) { |
379 |
– |
free((MEM_PTR)tms->lumap); |
380 |
– |
tms->lumap = NULL; |
381 |
– |
} |
382 |
– |
tms->mbrmin = tms->hbrmin; |
383 |
– |
tms->mbrmax = tms->hbrmax; |
384 |
– |
if (tms->mbrmin > tms->mbrmax) |
385 |
– |
return 0; |
386 |
– |
if (tms->lumap == NULL) |
387 |
– |
tms->lumap = (unsigned short *)malloc(sizeof(unsigned short)* |
388 |
– |
(tms->mbrmax-tms->mbrmin+1)); |
389 |
– |
return(tms->lumap != NULL); |
390 |
– |
} |
391 |
– |
|
392 |
– |
|
420 |
|
int |
421 |
|
tmFixedMapping( /* compute fixed, linear tone-mapping */ |
422 |
|
TMstruct *tms, |
435 |
|
if (gamval < MINGAM) |
436 |
|
gamval = tms->mongam; |
437 |
|
d = log(expmult/tms->inpsf); |
438 |
< |
for (i = tms->mbrmax-tms->mbrmin+1; i--; ) |
439 |
< |
tms->lumap[i] = 256. * exp( |
438 |
> |
for (i = tms->mbrmax-tms->mbrmin+1; i--; ) { |
439 |
> |
double val = TM_BRES * exp( |
440 |
|
( d + (tms->mbrmin+i)*(1./TM_BRTSCALE) ) |
441 |
< |
/ gamval ); |
441 |
> |
/ gamval); |
442 |
> |
tms->lumap[i] = val; |
443 |
> |
if (sizeof(TMAP_TYP) == 2 && val >= 0xffff) |
444 |
> |
tms->lumap[i] = 0xffff; |
445 |
> |
} |
446 |
|
returnOK; |
447 |
|
} |
448 |
|
|
456 |
|
) |
457 |
|
{ |
458 |
|
static const char funcName[] = "tmComputeMapping"; |
459 |
< |
int *histo; |
459 |
> |
HIST_TYP *histo; |
460 |
|
float *cumf; |
461 |
< |
int brt0, histlen, threshold, ceiling, trimmings; |
462 |
< |
double logLddyn, Ldmin, Ldavg, Lwavg, Tr, Lw, Ld; |
463 |
< |
int32 histot; |
461 |
> |
int brt0, histlen; |
462 |
> |
HIST_TYP threshold, ceiling, trimmings, histot; |
463 |
> |
double logLddyn, Ldmin, Lwavg, Tr, Lw, Ld; |
464 |
|
double sum; |
465 |
|
double d; |
466 |
|
int i, j; |
474 |
|
/* compute handy values */ |
475 |
|
Ldmin = Ldmax/Lddyn; |
476 |
|
logLddyn = log(Lddyn); |
477 |
< |
Ldavg = sqrt(Ldmax*Ldmin); |
478 |
< |
i = (tms->hbrmin-MINBRT)/HISTEP; |
479 |
< |
brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
449 |
< |
histlen = (tms->hbrmax-MINBRT)/HISTEP + 1 - i; |
477 |
> |
i = HISTI(tms->hbrmin); |
478 |
> |
brt0 = HISTV(i); |
479 |
> |
histlen = HISTI(tms->hbrmax) + 1 - i; |
480 |
|
/* histogram total and mean */ |
481 |
|
histot = 0; sum = 0; |
482 |
|
j = brt0 + histlen*HISTEP; |
483 |
|
for (i = histlen; i--; ) { |
484 |
|
histot += tms->histo[i]; |
485 |
< |
sum += (j -= HISTEP) * tms->histo[i]; |
485 |
> |
sum += (double)(j -= HISTEP) * tms->histo[i]; |
486 |
|
} |
487 |
< |
threshold = histot*0.005 + .5; |
488 |
< |
if (threshold < 4) |
487 |
> |
threshold = histot*0.002 + .5; |
488 |
> |
if (!histot) |
489 |
|
returnErr(TM_E_TMFAIL); |
490 |
|
Lwavg = tmLuminance( (double)sum / histot ); |
461 |
– |
/* allocate space for mapping */ |
462 |
– |
if (!tmNewMap(tms)) |
463 |
– |
returnErr(TM_E_NOMEM); |
491 |
|
/* use linear tone mapping? */ |
492 |
< |
if (tms->flags & TM_F_LINEAR) |
492 |
> |
if (tms->flags & TM_F_LINEAR || threshold < 4 || |
493 |
> |
tms->hbrmax - tms->hbrmin < TM_BRTSCALE*logLddyn) |
494 |
|
goto linearmap; |
495 |
|
/* clamp histogram */ |
496 |
< |
histo = (int *)malloc(histlen*sizeof(int)); |
496 |
> |
histo = (HIST_TYP *)malloc(histlen*sizeof(HIST_TYP)); |
497 |
|
cumf = (float *)malloc((histlen+2)*sizeof(float)); |
498 |
|
if ((histo == NULL) | (cumf == NULL)) |
499 |
|
returnErr(TM_E_NOMEM); |
500 |
|
cumf[histlen+1] = 1.; /* guard for assignment code */ |
501 |
< |
for (i = histlen; i--; ) /* make malleable copy */ |
502 |
< |
histo[i] = tms->histo[i]; |
501 |
> |
/* make malleable copy */ |
502 |
> |
memcpy((MEM_PTR)histo, (MEM_PTR)tms->histo, histlen*sizeof(HIST_TYP)); |
503 |
|
do { /* iterate to solution */ |
504 |
|
sum = 0; /* cumulative probability */ |
505 |
|
for (i = 0; i < histlen; i++) { |
506 |
< |
cumf[i] = (double)sum/histot; |
507 |
< |
sum += histo[i]; |
506 |
> |
cumf[i] = sum/histot; |
507 |
> |
sum += (double)histo[i]; |
508 |
|
} |
509 |
|
cumf[histlen] = 1.; |
510 |
|
Tr = histot * (double)(tms->hbrmax - tms->hbrmin) / |
511 |
< |
((double)histlen*TM_BRTSCALE) / logLddyn; |
511 |
> |
((double)TM_BRTSCALE*histlen*logLddyn); |
512 |
|
ceiling = Tr + 1.; |
513 |
|
trimmings = 0; /* clip to envelope */ |
514 |
|
for (i = histlen; i--; ) { |
531 |
|
goto linearmap; |
532 |
|
} |
533 |
|
} while (trimmings > threshold); |
534 |
+ |
/* allocate space for mapping */ |
535 |
+ |
if (!tmNewMap(tms)) |
536 |
+ |
returnErr(TM_E_NOMEM); |
537 |
|
/* assign tone-mapping */ |
538 |
|
for (i = tms->mbrmax-tms->mbrmin+1; i--; ) { |
539 |
|
j = d = (double)i/(tms->mbrmax-tms->mbrmin)*histlen; |
540 |
|
d -= (double)j; |
541 |
|
Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1])); |
542 |
|
d = (Ld - Ldmin)/(Ldmax - Ldmin); |
543 |
< |
tms->lumap[i] = 256.*pow(d, 1./gamval); |
543 |
> |
tms->lumap[i] = TM_BRES*pow(d, 1./gamval); |
544 |
|
} |
545 |
|
free((MEM_PTR)histo); /* clean up and return */ |
546 |
|
free((MEM_PTR)cumf); |
547 |
|
returnOK; |
548 |
|
linearmap: /* linear tone-mapping */ |
549 |
|
if (tms->flags & TM_F_HCONTR) |
550 |
< |
d = htcontrs(Ldavg) / htcontrs(Lwavg); |
550 |
> |
d = htcontrs(sqrt(Ldmax*Ldmin)) / htcontrs(Lwavg); |
551 |
|
else |
552 |
< |
d = Ldavg / Lwavg; |
552 |
> |
d = Ldmax / tmLuminance(tms->hbrmax); |
553 |
|
return(tmFixedMapping(tms, tms->inpsf*d/Ldmax, gamval)); |
554 |
|
} |
555 |
|
|
557 |
|
int |
558 |
|
tmMapPixels( /* apply tone-mapping to pixel(s) */ |
559 |
|
TMstruct *tms, |
560 |
< |
BYTE *ps, |
560 |
> |
uby8 *ps, |
561 |
|
TMbright *ls, |
562 |
< |
BYTE *cs, |
562 |
> |
uby8 *cs, |
563 |
|
int len |
564 |
|
) |
565 |
|
{ |
566 |
|
static const char funcName[] = "tmMapPixels"; |
567 |
< |
int32 li, pv; |
567 |
> |
TMbright lv; |
568 |
> |
TMAP_TYP li; |
569 |
> |
int pv; |
570 |
|
|
571 |
|
if (tms == NULL || tms->lumap == NULL) |
572 |
|
returnErr(TM_E_TMINVAL); |
573 |
|
if ((ps == NULL) | (ls == NULL) | (len < 0)) |
574 |
|
returnErr(TM_E_ILLEGAL); |
575 |
|
while (len--) { |
576 |
< |
if ((li = *ls++) < tms->mbrmin) { |
576 |
> |
if ((lv = *ls++) < tms->mbrmin) { |
577 |
|
li = 0; |
578 |
|
} else { |
579 |
< |
if (li > tms->mbrmax) |
580 |
< |
li = tms->mbrmax; |
581 |
< |
li = tms->lumap[li - tms->mbrmin]; |
579 |
> |
if (lv > tms->mbrmax) |
580 |
> |
lv = tms->mbrmax; |
581 |
> |
li = tms->lumap[lv - tms->mbrmin]; |
582 |
|
} |
583 |
< |
if (cs == TM_NOCHROM) |
584 |
< |
*ps++ = li>255 ? 255 : li; |
585 |
< |
else { |
583 |
> |
if (cs == TM_NOCHROM) { |
584 |
> |
#if !(TM_BRES & 0xff) |
585 |
> |
*ps++ = li>=TM_BRES ? 255 : li/(TM_BRES>>8); |
586 |
> |
#else |
587 |
> |
*ps++ = li>=TM_BRES ? 255 : (li<<8)/TM_BRES; |
588 |
> |
#endif |
589 |
> |
} else { |
590 |
|
pv = *cs++ * li / tms->cdiv[RED]; |
591 |
|
*ps++ = pv>255 ? 255 : pv; |
592 |
|
pv = *cs++ * li / tms->cdiv[GRN]; |
599 |
|
} |
600 |
|
|
601 |
|
|
565 |
– |
|
566 |
– |
|
602 |
|
TMstruct * |
603 |
< |
tmDup( /* duplicate top tone mapping */ |
603 |
> |
tmDup( /* duplicate tone mapping */ |
604 |
|
TMstruct *tms |
605 |
|
) |
606 |
|
{ |
615 |
|
return(NULL); |
616 |
|
*tmnew = *tms; /* copy everything */ |
617 |
|
if (tmnew->histo != NULL) { /* duplicate histogram */ |
618 |
< |
len = (tmnew->hbrmax-MINBRT)/HISTEP + 1 - |
619 |
< |
(tmnew->hbrmin-MINBRT)/HISTEP; |
585 |
< |
tmnew->histo = (int *)malloc(len*sizeof(int)); |
618 |
> |
len = HISTI(tmnew->hbrmax) + 1 - HISTI(tmnew->hbrmin); |
619 |
> |
tmnew->histo = (HIST_TYP *)malloc(len*sizeof(HIST_TYP)); |
620 |
|
if (tmnew->histo != NULL) |
621 |
< |
for (i = len; i--; ) |
622 |
< |
tmnew->histo[i] = tms->histo[i]; |
621 |
> |
memcpy((MEM_PTR)tmnew->histo, (MEM_PTR)tms->histo, |
622 |
> |
len*sizeof(HIST_TYP)); |
623 |
|
} |
624 |
|
if (tmnew->lumap != NULL) { /* duplicate luminance mapping */ |
625 |
|
len = tmnew->mbrmax-tmnew->mbrmin+1; |
626 |
< |
tmnew->lumap = (unsigned short *)malloc( |
593 |
< |
len*sizeof(unsigned short) ); |
626 |
> |
tmnew->lumap = (TMAP_TYP *)malloc(len*sizeof(TMAP_TYP)); |
627 |
|
if (tmnew->lumap != NULL) |
628 |
< |
for (i = len; i--; ) |
629 |
< |
tmnew->lumap[i] = tms->lumap[i]; |
628 |
> |
memcpy((MEM_PTR)tmnew->lumap, (MEM_PTR)tms->lumap, |
629 |
> |
len*sizeof(TMAP_TYP)); |
630 |
|
} |
631 |
|
/* clear package data */ |
632 |
|
for (i = tmNumPkgs; i--; ) |
658 |
|
|
659 |
|
/******************** Shared but Private library routines *********************/ |
660 |
|
|
661 |
< |
BYTE tmMesofact[BMESUPPER-BMESLOWER]; |
661 |
> |
uby8 tmMesofact[BMESUPPER-BMESLOWER]; |
662 |
|
|
663 |
|
void |
664 |
|
tmMkMesofact() /* build mesopic lookup factor table */ |
672 |
|
tmMesofact[i-BMESLOWER] = 256. * |
673 |
|
(tmLuminance(i) - LMESLOWER) / |
674 |
|
(LMESUPPER - LMESLOWER); |
675 |
+ |
} |
676 |
+ |
|
677 |
+ |
|
678 |
+ |
int |
679 |
+ |
tmNewMap( /* allocate new tone-mapping array */ |
680 |
+ |
TMstruct *tms |
681 |
+ |
) |
682 |
+ |
{ |
683 |
+ |
if (tms->lumap != NULL && (tms->mbrmax - tms->mbrmin) != |
684 |
+ |
(tms->hbrmax - tms->hbrmin)) { |
685 |
+ |
free((MEM_PTR)tms->lumap); |
686 |
+ |
tms->lumap = NULL; |
687 |
+ |
} |
688 |
+ |
tms->mbrmin = tms->hbrmin; |
689 |
+ |
tms->mbrmax = tms->hbrmax; |
690 |
+ |
if (tms->mbrmin > tms->mbrmax) |
691 |
+ |
return 0; |
692 |
+ |
if (tms->lumap == NULL) |
693 |
+ |
tms->lumap = (TMAP_TYP *)malloc(sizeof(TMAP_TYP)* |
694 |
+ |
(tms->mbrmax-tms->mbrmin+1)); |
695 |
+ |
return(tms->lumap != NULL); |
696 |
|
} |
697 |
|
|
698 |
|
|