| 15 |
|
|
| 16 |
|
#define LOGTABBITS 11 /* log table is 1<<LOGTABBITS long */ |
| 17 |
|
#define GAMTABBITS 9 /* gamma table is 1<<GAMTABBITS long */ |
| 18 |
+ |
#define MONGAMTSZ 1024 /* monitor gamma table length */ |
| 19 |
|
|
| 20 |
|
static float logtab[1<<LOGTABBITS]; |
| 21 |
|
static float gamtab[1<<GAMTABBITS]; |
| 22 |
|
static float gammul[16]; |
| 23 |
|
static double cur_gam = 0.; |
| 24 |
+ |
static uby8 mongamtab[MONGAMTSZ]; |
| 25 |
+ |
static double cur_mongam = 0.; |
| 26 |
|
|
| 27 |
|
#define imultpow2(i,s) ((s)>=0 ? (i)<<(s) : (i)>>-(s)) |
| 28 |
|
|
| 41 |
|
} |
| 42 |
|
|
| 43 |
|
|
| 44 |
< |
/* Fill our gamma table */ |
| 44 |
> |
/* Fill our input gamma table */ |
| 45 |
|
static void |
| 46 |
|
mkGamTable(double gv) |
| 47 |
|
{ |
| 57 |
|
} |
| 58 |
|
|
| 59 |
|
|
| 60 |
+ |
/* Fill our monitor gamma table */ |
| 61 |
+ |
static void |
| 62 |
+ |
mkMonGamTable(TMstruct *tms) |
| 63 |
+ |
{ |
| 64 |
+ |
int i; |
| 65 |
+ |
|
| 66 |
+ |
if (tms->mongam == cur_mongam) |
| 67 |
+ |
return; |
| 68 |
+ |
for (i = MONGAMTSZ; i--; ) |
| 69 |
+ |
mongamtab[i] = 256.*pow((i+.5)*(1./MONGAMTSZ), 1./tms->mongam); |
| 70 |
+ |
cur_mongam = tms->mongam; |
| 71 |
+ |
} |
| 72 |
+ |
|
| 73 |
+ |
|
| 74 |
|
/* Find normalizing shift value for a 2-byte unsigned integer */ |
| 75 |
|
static int |
| 76 |
|
normShift16(int i) |
| 111 |
|
return; |
| 112 |
|
} |
| 113 |
|
/* non-linear case */ |
| 114 |
< |
/* XXX Uncomment if routine is made public |
| 114 |
> |
/* XXX Uncomment if this routine is made public |
| 115 |
|
if (gv != cur_gam) |
| 116 |
|
mkGamTable(gv); |
| 117 |
|
*/ |
| 131 |
|
|
| 132 |
|
/* Convert 16-bit gray scanline to encoded luminance */ |
| 133 |
|
int |
| 134 |
< |
tmCvGray16(TMbright *ls, uint16 *scan, int len, double gv) |
| 134 |
> |
tmCvGray16(TMstruct *tms, TMbright *ls, uint16 *scan, int len, double gv) |
| 135 |
|
{ |
| 136 |
< |
static char funcName[] = "tmCvGray16"; |
| 136 |
> |
static const char funcName[] = "tmCvGray16"; |
| 137 |
|
static double cur_inpsf = 1.; |
| 138 |
|
static double log_inpsf = 0.; |
| 139 |
|
int nshft; |
| 140 |
|
double d; |
| 141 |
|
|
| 142 |
< |
if (tmTop == NULL) |
| 142 |
> |
if (tms == NULL) |
| 143 |
|
returnErr(TM_E_TMINVAL); |
| 144 |
< |
if (ls == NULL | scan == NULL | len < 0) |
| 144 |
> |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
| 145 |
|
returnErr(TM_E_ILLEGAL); |
| 146 |
|
if (gv <= 0.) |
| 147 |
|
gv = DEFGAM; |
| 148 |
|
/* initialize log table */ |
| 149 |
|
if (logtab[0] == 0.f) |
| 150 |
|
mkLogTable(); |
| 151 |
< |
if (cur_inpsf != tmTop->inpsf) |
| 152 |
< |
log_inpsf = log(cur_inpsf = tmTop->inpsf); |
| 151 |
> |
if (cur_inpsf != tms->inpsf) |
| 152 |
> |
log_inpsf = log(cur_inpsf = tms->inpsf); |
| 153 |
|
/* convert 16-bit grays */ |
| 154 |
|
while (len--) { |
| 155 |
|
nshft = normShift16(*scan); |
| 159 |
|
continue; |
| 160 |
|
} |
| 161 |
|
d = logtab[ imultpow2(*scan,LOGTABBITS-15+nshft) & |
| 162 |
< |
((1L<<LOGTABBITS)-1) ] |
| 163 |
< |
- M_LN2*nshft; |
| 162 |
> |
((1L<<LOGTABBITS)-1) ]; |
| 163 |
> |
d -= M_LN2*nshft; |
| 164 |
|
d = (double)TM_BRTSCALE * (gv*d + log_inpsf); |
| 165 |
|
*ls++ = (d>0. ? d+.5 : d-.5); |
| 166 |
|
scan++; |
| 170 |
|
|
| 171 |
|
/* Convert a 48-bit RGB scanline to encoded luminance/chrominance */ |
| 172 |
|
int |
| 173 |
< |
tmCvRGB48(TMbright *ls, BYTE *cs, uint16 (*scan)[3], int len, double gv) |
| 173 |
> |
tmCvRGB48(TMstruct *tms, TMbright *ls, uby8 *cs, |
| 174 |
> |
uint16 (*scan)[3], int len, double gv) |
| 175 |
|
{ |
| 176 |
< |
static char funcName[] = "tmCvRGB48"; |
| 176 |
> |
static const char funcName[] = "tmCvRGB48"; |
| 177 |
|
static double cur_inpsf = 1.; |
| 178 |
|
static double log_inpsf = 0.; |
| 179 |
|
int i; |
| 180 |
|
|
| 181 |
< |
if (tmTop == NULL) |
| 181 |
> |
if (tms == NULL) |
| 182 |
|
returnErr(TM_E_TMINVAL); |
| 183 |
< |
if (ls == NULL | scan == NULL | len < 0) |
| 183 |
> |
if ((ls == NULL) | (scan == NULL) | (len < 0)) |
| 184 |
|
returnErr(TM_E_ILLEGAL); |
| 185 |
|
if (gv <= 0.) |
| 186 |
|
gv = DEFGAM; |
| 187 |
< |
/* update gamma table */ |
| 188 |
< |
if (gv != 1. & gv != cur_gam) |
| 187 |
> |
/* sync input gamma table */ |
| 188 |
> |
if (gv != cur_gam) |
| 189 |
|
mkGamTable(gv); |
| 190 |
< |
#if 0 |
| 173 |
< |
if (tmNeedMatrix(tmTop)) { /* need floating point */ |
| 174 |
< |
#else |
| 175 |
< |
{ |
| 176 |
< |
#endif |
| 190 |
> |
if (tmNeedMatrix(tms)) { /* need floating point */ |
| 191 |
|
COLOR *newscan; |
| 192 |
|
newscan = (COLOR *)tempbuffer(len*sizeof(COLOR)); |
| 193 |
|
if (newscan == NULL) |
| 194 |
|
returnErr(TM_E_NOMEM); |
| 195 |
|
for (i = len; i--; ) |
| 196 |
|
rgb48_color(newscan[i], scan[i], gv); |
| 197 |
< |
return(tmCvColors(ls, cs, newscan, len)); |
| 197 |
> |
return(tmCvColors(tms, ls, cs, newscan, len)); |
| 198 |
|
} |
| 199 |
< |
#if 0 |
| 199 |
> |
/* sync monitor gamma table */ |
| 200 |
> |
if (cs != TM_NOCHROM && tms->mongam != cur_mongam) |
| 201 |
> |
mkMonGamTable(tms); |
| 202 |
|
/* initialize log table */ |
| 203 |
|
if (logtab[0] == 0.f) |
| 204 |
|
mkLogTable(); |
| 205 |
< |
if (cur_inpsf != tmTop->inpsf) |
| 206 |
< |
log_inpsf = log(cur_inpsf = tmTop->inpsf); |
| 205 |
> |
if (cur_inpsf != tms->inpsf) |
| 206 |
> |
log_inpsf = log(cur_inpsf = tms->inpsf); |
| 207 |
> |
if (tms->flags & TM_F_MESOPIC) |
| 208 |
> |
tmMkMesofact(); |
| 209 |
|
/* convert scanline */ |
| 210 |
|
for (i = len; i--; ) { |
| 211 |
< |
copycolr(cmon, scan[i]); |
| 212 |
< |
/* world luminance */ |
| 213 |
< |
li = ( cd->clfb[RED]*cmon[RED] + |
| 214 |
< |
cd->clfb[GRN]*cmon[GRN] + |
| 215 |
< |
cd->clfb[BLU]*cmon[BLU] ) >> 8; |
| 216 |
< |
bi = BRT2SCALE(cmon[EXP]-COLXS) + |
| 199 |
< |
logi[li] + cd->inpsfb; |
| 200 |
< |
if (li <= 0) { |
| 211 |
> |
int nshft = normShift48(scan[i]); |
| 212 |
> |
COLOR cmon; |
| 213 |
> |
double lum; |
| 214 |
> |
int bi; |
| 215 |
> |
|
| 216 |
> |
if (nshft < 0) { |
| 217 |
|
bi = TM_NOBRT; /* bogus value */ |
| 218 |
< |
li = 1; /* avoid li==0 */ |
| 218 |
> |
lum = 1.; |
| 219 |
> |
setcolor(cmon, 1., 1., 1.); |
| 220 |
> |
} else { |
| 221 |
> |
int j = GAMTABBITS-16+nshft; |
| 222 |
> |
int nshft2; |
| 223 |
> |
double d; |
| 224 |
> |
/* normalized linear */ |
| 225 |
> |
setcolor(cmon, gamtab[imultpow2(scan[i][0],j)], |
| 226 |
> |
gamtab[imultpow2(scan[i][1],j)], |
| 227 |
> |
gamtab[imultpow2(scan[i][2],j)] ); |
| 228 |
> |
lum = tms->clf[RED]*cmon[RED]; |
| 229 |
> |
lum += tms->clf[GRN]*cmon[GRN]; |
| 230 |
> |
lum += tms->clf[BLU]*cmon[BLU]; |
| 231 |
> |
/* convert to log Y */ |
| 232 |
> |
j = lum * (double)(1L<<16); |
| 233 |
> |
nshft2 = normShift16(j); |
| 234 |
> |
d = logtab[ imultpow2(j,LOGTABBITS-15+nshft2) & |
| 235 |
> |
((1L<<LOGTABBITS)-1) ]; |
| 236 |
> |
d -= M_LN2*(gv*nshft + nshft2); |
| 237 |
> |
d = (double)TM_BRTSCALE*(d + log_inpsf); |
| 238 |
> |
bi = (int)(d + .5 - (d < 0.)); |
| 239 |
|
} |
| 240 |
+ |
/* world luminance */ |
| 241 |
|
ls[i] = bi; |
| 242 |
|
if (cs == TM_NOCHROM) /* no color? */ |
| 243 |
|
continue; |
| 244 |
|
/* mesopic adj. */ |
| 245 |
< |
if (tmTop->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
| 246 |
< |
int pf, sli = normscot(cmon); |
| 245 |
> |
if (tms->flags & TM_F_MESOPIC && bi < BMESUPPER) { |
| 246 |
> |
double slum = scotlum(cmon); |
| 247 |
|
if (bi < BMESLOWER) |
| 248 |
< |
cmon[RED] = cmon[GRN] = cmon[BLU] = sli; |
| 248 |
> |
setcolor(cmon, slum, slum, slum); |
| 249 |
|
else { |
| 250 |
< |
if (tmTop->flags & TM_F_BW) |
| 251 |
< |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
| 252 |
< |
pf = tmMesofact[bi-BMESLOWER]; |
| 253 |
< |
sli *= 256 - pf; |
| 254 |
< |
cmon[RED] = ( sli + pf*cmon[RED] ) >> 8; |
| 255 |
< |
cmon[GRN] = ( sli + pf*cmon[GRN] ) >> 8; |
| 256 |
< |
cmon[BLU] = ( sli + pf*cmon[BLU] ) >> 8; |
| 250 |
> |
double pf; |
| 251 |
> |
pf = (1./256.)*tmMesofact[bi-BMESLOWER]; |
| 252 |
> |
if (tms->flags & TM_F_BW) |
| 253 |
> |
cmon[RED] = cmon[GRN] = cmon[BLU] = lum; |
| 254 |
> |
slum *= 1. - pf; |
| 255 |
> |
cmon[RED] = slum + pf*cmon[RED]; |
| 256 |
> |
cmon[GRN] = slum + pf*cmon[GRN]; |
| 257 |
> |
cmon[BLU] = slum + pf*cmon[BLU]; |
| 258 |
|
} |
| 259 |
< |
} else if (tmTop->flags & TM_F_BW) { |
| 260 |
< |
cmon[RED] = cmon[GRN] = cmon[BLU] = li; |
| 259 |
> |
} else if (tms->flags & TM_F_BW) { |
| 260 |
> |
int j = 3; |
| 261 |
> |
while (j--) cs[3*i+j] = tms->cdiv[j]/(TM_BRES>>8); |
| 262 |
> |
continue; |
| 263 |
|
} |
| 264 |
< |
bi = ( (int32)GAMTSZ*cd->clfb[RED]*cmon[RED]/li ) >> 8; |
| 265 |
< |
cs[3*i ] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 266 |
< |
bi = ( (int32)GAMTSZ*cd->clfb[GRN]*cmon[GRN]/li ) >> 8; |
| 267 |
< |
cs[3*i+1] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 268 |
< |
bi = ( (int32)GAMTSZ*cd->clfb[BLU]*cmon[BLU]/li ) >> 8; |
| 269 |
< |
cs[3*i+2] = bi>=GAMTSZ ? 255 : cd->gamb[bi]; |
| 264 |
> |
bi = (double)MONGAMTSZ*tms->clf[RED]*cmon[RED]/lum; |
| 265 |
> |
cs[3*i ] = bi>=MONGAMTSZ ? 255 : mongamtab[bi]; |
| 266 |
> |
bi = (double)MONGAMTSZ*tms->clf[GRN]*cmon[GRN]/lum; |
| 267 |
> |
cs[3*i+1] = bi>=MONGAMTSZ ? 255 : mongamtab[bi]; |
| 268 |
> |
bi = (double)MONGAMTSZ*tms->clf[BLU]*cmon[BLU]/lum; |
| 269 |
> |
cs[3*i+2] = bi>=MONGAMTSZ ? 255 : mongamtab[bi]; |
| 270 |
|
} |
| 271 |
|
returnOK; |
| 232 |
– |
#endif |
| 272 |
|
} |
