| 17 |
|
|
| 18 |
|
extern char *tempbuffer(); |
| 19 |
|
|
| 20 |
+ |
#define GAMTSZ 1024 |
| 21 |
+ |
|
| 22 |
+ |
typedef struct { |
| 23 |
+ |
BYTE gamb[GAMTSZ]; /* gamma lookup table */ |
| 24 |
+ |
COLR clfb; /* encoded tm->clf */ |
| 25 |
+ |
TMbright inpsfb; /* encoded tm->inpsf */ |
| 26 |
+ |
} COLRDATA; |
| 27 |
+ |
|
| 28 |
+ |
static MEM_PTR colrInit(); |
| 29 |
+ |
static void colrNewSpace(); |
| 30 |
+ |
extern void free(); |
| 31 |
+ |
static struct tmPackage colrPkg = { /* our package functions */ |
| 32 |
+ |
colrInit, colrNewSpace, free |
| 33 |
+ |
}; |
| 34 |
+ |
static int colrReg = -1; /* our package registration number */ |
| 35 |
+ |
|
| 36 |
|
#define LOGISZ 260 |
| 37 |
|
static TMbright logi[LOGISZ]; |
| 38 |
|
static BYTE photofact[BMESUPPER-BMESLOWER]; |
| 47 |
|
{ |
| 48 |
|
static char funcName[] = "tmCvColrs"; |
| 49 |
|
COLR cmon; |
| 50 |
+ |
register COLRDATA *cd; |
| 51 |
|
register int i, bi, li; |
| 52 |
|
|
| 53 |
|
if (tmTop == NULL) |
| 54 |
|
returnErr(TM_E_TMINVAL); |
| 55 |
|
if (ls == NULL | scan == NULL | len <= 0) |
| 56 |
|
returnErr(TM_E_ILLEGAL); |
| 57 |
< |
if (tmTop->flags & TM_F_NEEDMAT) { /* need floating point */ |
| 57 |
> |
if (tmNeedMatrix(tmTop)) { /* need floating point */ |
| 58 |
|
register COLOR *newscan; |
| 59 |
|
newscan = (COLOR *)tempbuffer(len*sizeof(COLOR)); |
| 60 |
|
if (newscan == NULL) |
| 63 |
|
colr_color(newscan[i], scan[i]); |
| 64 |
|
return(tmCvColors(ls, cs, newscan, len)); |
| 65 |
|
} |
| 66 |
< |
if (logi[0] == 0) { /* build tables if necessary */ |
| 66 |
> |
if (colrReg == -1) { /* build tables if necessary */ |
| 67 |
> |
colrReg = tmRegPkg(&colrPkg); |
| 68 |
> |
if (colrReg < 0) |
| 69 |
> |
returnErr(TM_E_CODERR1); |
| 70 |
|
for (i = 256; i--; ) |
| 71 |
|
logi[i] = TM_BRTSCALE*log((i+.5)/256.) - .5; |
| 72 |
|
for (i = 256; i < LOGISZ; i++) |
| 76 |
|
(tmLuminance(i) - LMESLOWER) / |
| 77 |
|
(LMESUPPER - LMESLOWER); |
| 78 |
|
} |
| 79 |
+ |
if ((cd = (COLRDATA *)tmPkgData(tmTop,colrReg)) == NULL) |
| 80 |
+ |
returnErr(TM_E_NOMEM); |
| 81 |
|
for (i = len; i--; ) { |
| 82 |
|
copycolr(cmon, scan[i]); |
| 83 |
|
/* world luminance */ |
| 84 |
< |
li = ( tmTop->clfb[RED]*cmon[RED] + |
| 85 |
< |
tmTop->clfb[GRN]*cmon[GRN] + |
| 86 |
< |
tmTop->clfb[BLU]*cmon[BLU] ) >> 8; |
| 84 |
> |
li = ( cd->clfb[RED]*cmon[RED] + |
| 85 |
> |
cd->clfb[GRN]*cmon[GRN] + |
| 86 |
> |
cd->clfb[BLU]*cmon[BLU] ) >> 8; |
| 87 |
|
bi = BRT2SCALE*(cmon[EXP]-COLXS) + |
| 88 |
< |
logi[li] + tmTop->inpsfb; |
| 88 |
> |
logi[li] + cd->inpsfb; |
| 89 |
|
if (bi < MINBRT) { |
| 90 |
|
bi = MINBRT-1; /* bogus value */ |
| 91 |
|
li++; /* avoid li==0 */ |
| 110 |
|
} else if (tmTop->flags & TM_F_BW) { |
| 111 |
|
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
| 112 |
|
} |
| 113 |
< |
bi = ( (int4)TM_GAMTSZ*tmTop->clfb[RED]*cmon[RED]/li ) >> 8; |
| 114 |
< |
cs[3*i ] = bi>=TM_GAMTSZ ? 255 : tmTop->gamb[bi]; |
| 115 |
< |
bi = ( (int4)TM_GAMTSZ*tmTop->clfb[GRN]*cmon[GRN]/li ) >> 8; |
| 116 |
< |
cs[3*i+1] = bi>=TM_GAMTSZ ? 255 : tmTop->gamb[bi]; |
| 117 |
< |
bi = ( (int4)TM_GAMTSZ*tmTop->clfb[BLU]*cmon[BLU]/li ) >> 8; |
| 118 |
< |
cs[3*i+2] = bi>=TM_GAMTSZ ? 255 : tmTop->gamb[bi]; |
| 113 |
> |
bi = ( (int4)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8; |
| 114 |
> |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 115 |
> |
bi = ( (int4)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8; |
| 116 |
> |
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 117 |
> |
bi = ( (int4)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 8; |
| 118 |
> |
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 119 |
|
} |
| 120 |
|
returnOK; |
| 121 |
|
} |
| 387 |
|
returnErr(err); |
| 388 |
|
} |
| 389 |
|
returnOK; |
| 390 |
+ |
} |
| 391 |
+ |
|
| 392 |
+ |
|
| 393 |
+ |
static void |
| 394 |
+ |
colrNewSpace(tms) /* color space changed for tone mapping */ |
| 395 |
+ |
register struct tmStruct *tms; |
| 396 |
+ |
{ |
| 397 |
+ |
register COLRDATA *cd; |
| 398 |
+ |
double d; |
| 399 |
+ |
|
| 400 |
+ |
cd = (COLRDATA *)tms->pd[colrReg]; |
| 401 |
+ |
cd->clfb[RED] = 256.*tms->clf[RED] + .5; |
| 402 |
+ |
cd->clfb[GRN] = 256.*tms->clf[GRN] + .5; |
| 403 |
+ |
cd->clfb[BLU] = 256.*tms->clf[BLU] + .5; |
| 404 |
+ |
cd->clfb[EXP] = COLXS; |
| 405 |
+ |
d = TM_BRTSCALE*log(tms->inpsf); |
| 406 |
+ |
cd->inpsfb = d<0. ? d-.5 : d+.5; |
| 407 |
+ |
} |
| 408 |
+ |
|
| 409 |
+ |
|
| 410 |
+ |
static MEM_PTR |
| 411 |
+ |
colrInit(tms) /* initialize private data for tone mapping */ |
| 412 |
+ |
register struct tmStruct *tms; |
| 413 |
+ |
{ |
| 414 |
+ |
register COLRDATA *cd; |
| 415 |
+ |
register int i; |
| 416 |
+ |
/* allocate our data */ |
| 417 |
+ |
cd = (COLRDATA *)malloc(sizeof(COLRDATA)); |
| 418 |
+ |
if (cd == NULL) |
| 419 |
+ |
return(NULL); |
| 420 |
+ |
tms->pd[colrReg] = (MEM_PTR)cd; |
| 421 |
+ |
/* compute gamma table */ |
| 422 |
+ |
for (i = GAMTSZ; i--; ) |
| 423 |
+ |
cd->gamb[i] = 256.*pow((i+.5)/GAMTSZ, 1./tms->mongam); |
| 424 |
+ |
/* compute color and scale factors */ |
| 425 |
+ |
colrNewSpace(tms); |
| 426 |
+ |
return((MEM_PTR)cd); |
| 427 |
|
} |
