| 1 |
gwlarson |
3.1 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
| 2 |
|
|
|
| 3 |
|
|
#ifndef lint |
| 4 |
|
|
static char SCCSid[] = "$SunId$ SGI"; |
| 5 |
|
|
#endif |
| 6 |
|
|
|
| 7 |
|
|
/* |
| 8 |
|
|
* Routines for tone-mapping LogLuv encoded pixels. |
| 9 |
|
|
*/ |
| 10 |
|
|
|
| 11 |
|
|
#include <stdio.h> |
| 12 |
|
|
#include <math.h> |
| 13 |
|
|
#include "tiffio.h" |
| 14 |
|
|
#include "tmprivat.h" |
| 15 |
|
|
#include "uvcode.h" |
| 16 |
|
|
|
| 17 |
|
|
#ifndef BSD |
| 18 |
|
|
#define bzero(d,n) (void)memset(d,0,n) |
| 19 |
|
|
#endif |
| 20 |
|
|
#define uvflgop(p,uv,op) ((p)->rgbflg[(uv)>>5] op (1L<<((uv)&0x1f))) |
| 21 |
|
|
#define isuvset(p,uv) uvflgop(p,uv,&) |
| 22 |
|
|
#define setuv(p,uv) uvflgop(p,uv,|=) |
| 23 |
|
|
#define clruv(p,uv) uvflgop(p,uv,&=~) |
| 24 |
|
|
#define clruvall(p) bzero((MEM_PTR)(p)->rgbflg,sizeof((p)->rgbflg)) |
| 25 |
|
|
|
| 26 |
|
|
#define U_NEU 0.210526316 |
| 27 |
|
|
#define V_NEU 0.473684211 |
| 28 |
|
|
|
| 29 |
|
|
static MEM_PTR luv32Init(); |
| 30 |
|
|
static void luv32NewSpace(); |
| 31 |
|
|
static MEM_PTR luv24Init(); |
| 32 |
|
|
static void luv24NewSpace(); |
| 33 |
|
|
extern void free(); |
| 34 |
|
|
|
| 35 |
|
|
typedef struct { |
| 36 |
|
|
int offset; /* computed luminance offset */ |
| 37 |
|
|
BYTE rgbval[1<<16][3]; /* computed RGB value for given uv */ |
| 38 |
|
|
uint32 rgbflg[1<<(16-5)]; /* flags for computed values */ |
| 39 |
|
|
} LUV32DATA; /* LogLuv 32-bit conversion data */ |
| 40 |
|
|
|
| 41 |
|
|
#define UVSCALE 410. |
| 42 |
|
|
#define UVNEU ((int)(UVSCALE*U_NEU)<<8 \ |
| 43 |
|
|
| (int)(UVSCALE*V_NEU)) |
| 44 |
|
|
|
| 45 |
|
|
static struct tmPackage luv32Pkg = { /* 32-bit package functions */ |
| 46 |
|
|
luv32Init, luv32NewSpace, free |
| 47 |
|
|
}; |
| 48 |
|
|
static int luv32Reg = -1; /* 32-bit package reg. number */ |
| 49 |
|
|
|
| 50 |
|
|
typedef struct { |
| 51 |
|
|
int offset; /* computed luminance offset */ |
| 52 |
|
|
BYTE rgbval[1<<14][3]; /* computed rgb value for uv index */ |
| 53 |
|
|
uint32 rgbflg[1<<(14-5)]; /* flags for computed values */ |
| 54 |
|
|
} LUV24DATA; /* LogLuv 24-bit conversion data */ |
| 55 |
|
|
|
| 56 |
|
|
static struct tmPackage luv24Pkg = { /* 24-bit package functions */ |
| 57 |
|
|
luv24Init, luv24NewSpace, free |
| 58 |
|
|
}; |
| 59 |
|
|
static int luv24Reg = -1; /* 24-bit package reg. number */ |
| 60 |
|
|
|
| 61 |
|
|
static int uv14neu = -1; /* neutral index for 14-bit (u',v') */ |
| 62 |
|
|
|
| 63 |
|
|
|
| 64 |
|
|
static |
| 65 |
|
|
uv2rgb(rgb, tm, uvp) /* compute RGB from uv coordinate */ |
| 66 |
|
|
BYTE rgb[3]; |
| 67 |
|
|
register struct tmStruct *tm; |
| 68 |
|
|
double uvp[2]; |
| 69 |
|
|
{ /* Should check that tm->inppri==TM_XYZPRIM beforehand... */ |
| 70 |
|
|
double d, x, y; |
| 71 |
|
|
COLR XYZ, RGB; |
| 72 |
|
|
/* convert to XYZ */ |
| 73 |
|
|
d = 1./(6.*uvp[0] - 16.*uvp[1] + 12.); |
| 74 |
|
|
x = 9.*uvp[0] * d; |
| 75 |
|
|
y = 4.*uvp[1] * d; |
| 76 |
|
|
XYZ[CIEY] = 1./tm->inpsf; |
| 77 |
|
|
XYZ[CIEX] = x/y * XYZ[CIEY]; |
| 78 |
|
|
XYZ[CIEZ] = (1.-x-y)/y * XYZ[CIEY]; |
| 79 |
|
|
/* convert to RGB and clip */ |
| 80 |
|
|
colortrans(RGB, tm->cmat, XYZ); |
| 81 |
|
|
clipgamut(RGB, XYZ[CIEY], CGAMUT_LOWER, cblack, cwhite); |
| 82 |
|
|
/* perform final scaling & gamma */ |
| 83 |
|
|
d = tm->clf[RED] * RGB[RED]; |
| 84 |
|
|
rgb[RED] = d>=.999 ? 255 : (int)(256.*pow(d, 1./tm->mongam)); |
| 85 |
|
|
d = tm->clf[GRN] * RGB[GRN]; |
| 86 |
|
|
rgb[GRN] = d>=.999 ? 255 : (int)(256.*pow(d, 1./tm->mongam)); |
| 87 |
|
|
d = tm->clf[BLU] * RGB[BLU]; |
| 88 |
|
|
rgb[BLU] = d>=.999 ? 255 : (int)(256.*pow(d, 1./tm->mongam)); |
| 89 |
|
|
} |
| 90 |
|
|
|
| 91 |
|
|
|
| 92 |
|
|
static TMbright |
| 93 |
|
|
compmeshift(li, uvp) /* compute mesopic color shift */ |
| 94 |
|
|
TMbright li; /* encoded world luminance */ |
| 95 |
|
|
double uvp[2]; /* world (u',v') -> returned desaturated */ |
| 96 |
|
|
{ |
| 97 |
|
|
/* UNIMPLEMENTED */ |
| 98 |
|
|
return(li); |
| 99 |
|
|
} |
| 100 |
|
|
|
| 101 |
|
|
|
| 102 |
|
|
static int |
| 103 |
|
|
uvpencode(uvp) /* encode (u',v') coordinates */ |
| 104 |
|
|
double uvp[2]; |
| 105 |
|
|
{ |
| 106 |
|
|
register int vi, ui; |
| 107 |
|
|
|
| 108 |
|
|
if (uvp[1] < UV_VSTART) |
| 109 |
|
|
return(-1); |
| 110 |
|
|
vi = (uvp[1] - UV_VSTART)*(1./UV_SQSIZ); |
| 111 |
|
|
if (vi >= UV_NVS) |
| 112 |
|
|
return(-1); |
| 113 |
|
|
if (uvp[0] < uv_row[vi].ustart) |
| 114 |
|
|
return(-1); |
| 115 |
|
|
ui = (uvp[0] - uv_row[vi].ustart)*(1./UV_SQSIZ); |
| 116 |
|
|
if (ui >= uv_row[vi].nus) |
| 117 |
|
|
return(-1); |
| 118 |
|
|
return(uv_row[vi].ncum + ui); |
| 119 |
|
|
} |
| 120 |
|
|
|
| 121 |
|
|
|
| 122 |
|
|
static int |
| 123 |
|
|
uvpdecode(uvp, c) /* decode (u',v') index */ |
| 124 |
|
|
double uvp[2]; |
| 125 |
|
|
int c; |
| 126 |
|
|
{ |
| 127 |
|
|
int upper, lower; |
| 128 |
|
|
register int ui, vi; |
| 129 |
|
|
|
| 130 |
|
|
if (c < 0 || c >= UV_NDIVS) |
| 131 |
|
|
return(-1); |
| 132 |
|
|
lower = 0; /* binary search */ |
| 133 |
|
|
upper = UV_NVS; |
| 134 |
|
|
do { |
| 135 |
|
|
vi = (lower + upper) >> 1; |
| 136 |
|
|
ui = c - uv_row[vi].ncum; |
| 137 |
|
|
if (ui > 0) |
| 138 |
|
|
lower = vi; |
| 139 |
|
|
else if (ui < 0) |
| 140 |
|
|
upper = vi; |
| 141 |
|
|
else |
| 142 |
|
|
break; |
| 143 |
|
|
} while (upper - lower > 1); |
| 144 |
|
|
vi = lower; |
| 145 |
|
|
ui = c - uv_row[vi].ncum; |
| 146 |
|
|
uvp[0] = uv_row[vi].ustart + (ui+.5)*UV_SQSIZ; |
| 147 |
|
|
uvp[1] = UV_VSTART + (vi+.5)*UV_SQSIZ; |
| 148 |
|
|
return(0); |
| 149 |
|
|
} |
| 150 |
|
|
|
| 151 |
|
|
|
| 152 |
|
|
int |
| 153 |
|
|
tmCvLuv32(ls, cs, luvs, len) /* convert raw 32-bit LogLuv values */ |
| 154 |
|
|
TMbright *ls; |
| 155 |
|
|
BYTE *cs; |
| 156 |
|
|
uint32 *luvs; |
| 157 |
|
|
int len; |
| 158 |
|
|
{ |
| 159 |
|
|
static char funcName[] = "tmCvLuv32"; |
| 160 |
|
|
double uvp[2]; |
| 161 |
|
|
register LUV32DATA *ld; |
| 162 |
|
|
register int i, j; |
| 163 |
|
|
/* check arguments */ |
| 164 |
|
|
if (tmTop == NULL) |
| 165 |
|
|
returnErr(TM_E_TMINVAL); |
| 166 |
|
|
if (ls == NULL | luvs == NULL | len < 0) |
| 167 |
|
|
returnErr(TM_E_ILLEGAL); |
| 168 |
|
|
/* check package registration */ |
| 169 |
|
|
if (luv32Reg < 0 && (luv32Reg = tmRegPkg(&luv32Pkg)) < 0) |
| 170 |
|
|
returnErr(TM_E_CODERR1); |
| 171 |
|
|
/* get package data */ |
| 172 |
|
|
if ((ld = (LUV32DATA *)tmPkgData(tmTop,luv32Reg)) == NULL) |
| 173 |
|
|
returnErr(TM_E_NOMEM); |
| 174 |
|
|
/* convert each pixel */ |
| 175 |
|
|
for (i = len; i--; ) { |
| 176 |
|
|
j = luvs[i] >> 16; /* get luminance */ |
| 177 |
|
|
if (j & 0x8000) /* negative luminance */ |
| 178 |
|
|
ls[i] = MINBRT-1; /* assign bogus value */ |
| 179 |
|
|
else /* else convert to lnL */ |
| 180 |
|
|
ls[i] = (BRT2SCALE*j >> 8) - ld->offset; |
| 181 |
|
|
if (cs == TM_NOCHROM) /* no color? */ |
| 182 |
|
|
continue; |
| 183 |
|
|
/* get chrominance */ |
| 184 |
|
|
if (tmTop->flags & TM_F_MESOPIC && ls[i] < BMESUPPER) { |
| 185 |
|
|
uvp[0] = 1./UVSCALE*((luvs[i]>>8 & 0xff) + .5); |
| 186 |
|
|
uvp[1] = 1./UVSCALE*((luvs[i] & 0xff) + .5); |
| 187 |
|
|
ls[i] = compmeshift(ls[i], uvp); |
| 188 |
|
|
j = tmTop->flags & TM_F_BW || ls[i] < BMESLOWER |
| 189 |
|
|
? UVNEU |
| 190 |
|
|
: (int)(uvp[0]*UVSCALE)<<8 |
| 191 |
|
|
| (int)(uvp[1]*UVSCALE); |
| 192 |
|
|
} else { |
| 193 |
|
|
j = tmTop->flags&TM_F_BW ? UVNEU : luvs[i]&0xffff; |
| 194 |
|
|
} |
| 195 |
|
|
if (!isuvset(ld, j)) { |
| 196 |
|
|
uvp[0] = 1./UVSCALE*((luvs[i]>>8 & 0xff) + .5); |
| 197 |
|
|
uvp[1] = 1./UVSCALE*((luvs[i] & 0xff) + .5); |
| 198 |
|
|
uv2rgb(ld->rgbval[j], tmTop, uvp); |
| 199 |
|
|
setuv(ld, j); |
| 200 |
|
|
} |
| 201 |
|
|
cs[3*i ] = ld->rgbval[j][RED]; |
| 202 |
|
|
cs[3*i+1] = ld->rgbval[j][GRN]; |
| 203 |
|
|
cs[3*i+2] = ld->rgbval[j][BLU]; |
| 204 |
|
|
} |
| 205 |
|
|
returnOK; |
| 206 |
|
|
} |
| 207 |
|
|
|
| 208 |
|
|
|
| 209 |
|
|
int |
| 210 |
|
|
tmCvLuv24(ls, cs, luvs, len) /* convert raw 24-bit LogLuv values */ |
| 211 |
|
|
TMbright *ls; |
| 212 |
|
|
BYTE *cs; |
| 213 |
|
|
uint32 *luvs; |
| 214 |
|
|
int len; |
| 215 |
|
|
{ |
| 216 |
|
|
char funcName[] = "tmCvLuv24"; |
| 217 |
|
|
double uvp[2]; |
| 218 |
|
|
register LUV24DATA *ld; |
| 219 |
|
|
register int i, j; |
| 220 |
|
|
/* check arguments */ |
| 221 |
|
|
if (tmTop == NULL) |
| 222 |
|
|
returnErr(TM_E_TMINVAL); |
| 223 |
|
|
if (ls == NULL | luvs == NULL | len < 0) |
| 224 |
|
|
returnErr(TM_E_ILLEGAL); |
| 225 |
|
|
/* check package registration */ |
| 226 |
|
|
if (luv24Reg < 0 && (luv24Reg = tmRegPkg(&luv24Pkg)) < 0) |
| 227 |
|
|
returnErr(TM_E_CODERR1); |
| 228 |
|
|
/* get package data */ |
| 229 |
|
|
if ((ld = (LUV24DATA *)tmPkgData(tmTop,luv24Reg)) == NULL) |
| 230 |
|
|
returnErr(TM_E_NOMEM); |
| 231 |
|
|
/* convert each pixel */ |
| 232 |
|
|
for (i = len; i--; ) { |
| 233 |
|
|
j = luvs[i] >> 14; /* get luminance */ |
| 234 |
|
|
ls[i] = (BRT2SCALE*j >> 6) - ld->offset; |
| 235 |
|
|
if (cs == TM_NOCHROM) /* no color? */ |
| 236 |
|
|
continue; |
| 237 |
|
|
/* get chrominance */ |
| 238 |
|
|
if (tmTop->flags & TM_F_MESOPIC && ls[i] < BMESUPPER) { |
| 239 |
|
|
if (uvpdecode(uvp, luvs[i]&0x3fff) < 0) { |
| 240 |
|
|
uvp[0] = U_NEU; /* should barf? */ |
| 241 |
|
|
uvp[1] = V_NEU; |
| 242 |
|
|
} |
| 243 |
|
|
ls[i] = compmeshift(ls[i], uvp); |
| 244 |
|
|
if (tmTop->flags & TM_F_BW || ls[i] < BMESLOWER |
| 245 |
|
|
|| (j = uvpencode(uvp)) < 0) |
| 246 |
|
|
j = uv14neu; |
| 247 |
|
|
} else { |
| 248 |
|
|
j = tmTop->flags&TM_F_BW ? uv14neu : luvs[i]&0x3fff; |
| 249 |
|
|
} |
| 250 |
|
|
if (!isuvset(ld, j)) { |
| 251 |
|
|
if (uvpdecode(uvp, j) < 0) { |
| 252 |
|
|
uvp[0] = U_NEU; |
| 253 |
|
|
uvp[1] = V_NEU; |
| 254 |
|
|
} |
| 255 |
|
|
uv2rgb(ld->rgbval[j], tmTop, uvp); |
| 256 |
|
|
setuv(ld, j); |
| 257 |
|
|
} |
| 258 |
|
|
cs[3*i ] = ld->rgbval[j][RED]; |
| 259 |
|
|
cs[3*i+1] = ld->rgbval[j][GRN]; |
| 260 |
|
|
cs[3*i+2] = ld->rgbval[j][BLU]; |
| 261 |
|
|
} |
| 262 |
|
|
returnOK; |
| 263 |
|
|
} |
| 264 |
|
|
|
| 265 |
|
|
|
| 266 |
|
|
int |
| 267 |
|
|
tmCvL16(ls, l16s, len) /* convert 16-bit LogL values */ |
| 268 |
|
|
TMbright *ls; |
| 269 |
|
|
uint16 *l16s; |
| 270 |
|
|
int len; |
| 271 |
|
|
{ |
| 272 |
|
|
static char funcName[] = "tmCvL16"; |
| 273 |
|
|
static double lastsf; |
| 274 |
|
|
static int offset; |
| 275 |
|
|
register int i; |
| 276 |
|
|
/* check arguments */ |
| 277 |
|
|
if (tmTop == NULL) |
| 278 |
|
|
returnErr(TM_E_TMINVAL); |
| 279 |
|
|
if (ls == NULL | l16s == NULL | len < 0) |
| 280 |
|
|
returnErr(TM_E_ILLEGAL); |
| 281 |
|
|
/* check scaling offset */ |
| 282 |
|
|
if (!FEQ(tmTop->inpsf, lastsf)) { |
| 283 |
|
|
offset = BRT2SCALE*64; |
| 284 |
|
|
if (tmTop->inpsf > 1.0001) |
| 285 |
|
|
offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)+.5); |
| 286 |
|
|
else if (tmTop->inpsf < 0.9999) |
| 287 |
|
|
offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)-.5); |
| 288 |
|
|
lastsf = tmTop->inpsf; |
| 289 |
|
|
} |
| 290 |
|
|
/* convert each pixel */ |
| 291 |
|
|
for (i = len; i--; ) { |
| 292 |
|
|
if (l16s[i] & 0x8000) /* negative luminance */ |
| 293 |
|
|
ls[i] = MINBRT-1; /* assign bogus value */ |
| 294 |
|
|
else /* else convert to lnL */ |
| 295 |
|
|
ls[i] = (BRT2SCALE*l16s[i] >> 8) - offset; |
| 296 |
|
|
} |
| 297 |
|
|
returnOK; |
| 298 |
|
|
} |
| 299 |
|
|
|
| 300 |
|
|
|
| 301 |
|
|
static void |
| 302 |
|
|
luv32NewSpace(tm) /* initialize 32-bit LogLuv color space */ |
| 303 |
|
|
struct tmStruct *tm; |
| 304 |
|
|
{ |
| 305 |
|
|
register LUV32DATA *ld; |
| 306 |
|
|
|
| 307 |
|
|
if (tm->inppri != TM_XYZPRIM) { /* panic time! */ |
| 308 |
|
|
fputs("Improper input color space in luv32NewSpace!\n", stderr); |
| 309 |
|
|
exit(1); |
| 310 |
|
|
} |
| 311 |
|
|
ld = (LUV32DATA *)tm->pd[luv32Reg]; |
| 312 |
|
|
ld->offset = BRT2SCALE*64; |
| 313 |
|
|
if (tm->inpsf > 1.0001) |
| 314 |
|
|
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)+.5); |
| 315 |
|
|
else if (tm->inpsf < 0.9999) |
| 316 |
|
|
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)-.5); |
| 317 |
|
|
clruvall(ld); |
| 318 |
|
|
} |
| 319 |
|
|
|
| 320 |
|
|
|
| 321 |
|
|
static MEM_PTR |
| 322 |
|
|
luv32Init(tm) /* allocate data for 32-bit LogLuv decoder */ |
| 323 |
|
|
struct tmStruct *tm; |
| 324 |
|
|
{ |
| 325 |
|
|
register LUV32DATA *ld; |
| 326 |
|
|
|
| 327 |
|
|
ld = (LUV32DATA *)malloc(sizeof(LUV32DATA)); |
| 328 |
|
|
if (ld == NULL) |
| 329 |
|
|
return(NULL); |
| 330 |
|
|
tm->pd[luv32Reg] = (MEM_PTR)ld; |
| 331 |
|
|
luv32NewSpace(tm); |
| 332 |
|
|
return((MEM_PTR)ld); |
| 333 |
|
|
} |
| 334 |
|
|
|
| 335 |
|
|
|
| 336 |
|
|
static void |
| 337 |
|
|
luv24NewSpace(tm) /* initialize 24-bit LogLuv color space */ |
| 338 |
|
|
struct tmStruct *tm; |
| 339 |
|
|
{ |
| 340 |
|
|
register LUV24DATA *ld; |
| 341 |
|
|
double uvp[2]; |
| 342 |
|
|
|
| 343 |
|
|
if (tm->inppri != TM_XYZPRIM) { /* panic time! */ |
| 344 |
|
|
fputs("Improper input color space in luv24NewSpace!\n", stderr); |
| 345 |
|
|
exit(1); |
| 346 |
|
|
} |
| 347 |
|
|
ld = (LUV24DATA *)tm->pd[luv24Reg]; |
| 348 |
|
|
ld->offset = BRT2SCALE*12; |
| 349 |
|
|
if (tm->inpsf > 1.0001) |
| 350 |
|
|
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)+.5); |
| 351 |
|
|
else if (tm->inpsf < 0.9999) |
| 352 |
|
|
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)-.5); |
| 353 |
|
|
clruvall(ld); |
| 354 |
|
|
} |
| 355 |
|
|
|
| 356 |
|
|
|
| 357 |
|
|
static MEM_PTR |
| 358 |
|
|
luv24Init(tm) /* allocate data for 24-bit LogLuv decoder */ |
| 359 |
|
|
struct tmStruct *tm; |
| 360 |
|
|
{ |
| 361 |
|
|
register LUV24DATA *ld; |
| 362 |
|
|
|
| 363 |
|
|
ld = (LUV24DATA *)malloc(sizeof(LUV24DATA)); |
| 364 |
|
|
if (ld == NULL) |
| 365 |
|
|
return(NULL); |
| 366 |
|
|
tm->pd[luv24Reg] = (MEM_PTR)ld; |
| 367 |
|
|
if (uv14neu < 0) { /* initialize neutral color index */ |
| 368 |
|
|
double uvp[2]; |
| 369 |
|
|
uvp[0] = U_NEU; uvp[1] = V_NEU; |
| 370 |
|
|
uv14neu = uvpencode(uvp); |
| 371 |
|
|
} |
| 372 |
|
|
luv24NewSpace(tm); |
| 373 |
|
|
return((MEM_PTR)ld); |
| 374 |
|
|
} |
