| 1 |
#ifndef lint
|
| 2 |
static const char RCSid[] = "$Id$";
|
| 3 |
#endif
|
| 4 |
/*
|
| 5 |
* Routines for tone-mapping LogLuv encoded pixels.
|
| 6 |
*
|
| 7 |
* Externals declared in tmaptiff.h
|
| 8 |
*/
|
| 9 |
|
| 10 |
/* ====================================================================
|
| 11 |
* The Radiance Software License, Version 1.0
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| 12 |
*
|
| 13 |
* Copyright (c) 1990 - 2002 The Regents of the University of California,
|
| 14 |
* through Lawrence Berkeley National Laboratory. All rights reserved.
|
| 15 |
*
|
| 16 |
* Redistribution and use in source and binary forms, with or without
|
| 17 |
* modification, are permitted provided that the following conditions
|
| 18 |
* are met:
|
| 19 |
*
|
| 20 |
* 1. Redistributions of source code must retain the above copyright
|
| 21 |
* notice, this list of conditions and the following disclaimer.
|
| 22 |
*
|
| 23 |
* 2. Redistributions in binary form must reproduce the above copyright
|
| 24 |
* notice, this list of conditions and the following disclaimer in
|
| 25 |
* the documentation and/or other materials provided with the
|
| 26 |
* distribution.
|
| 27 |
*
|
| 28 |
* 3. The end-user documentation included with the redistribution,
|
| 29 |
* if any, must include the following acknowledgment:
|
| 30 |
* "This product includes Radiance software
|
| 31 |
* (http://radsite.lbl.gov/)
|
| 32 |
* developed by the Lawrence Berkeley National Laboratory
|
| 33 |
* (http://www.lbl.gov/)."
|
| 34 |
* Alternately, this acknowledgment may appear in the software itself,
|
| 35 |
* if and wherever such third-party acknowledgments normally appear.
|
| 36 |
*
|
| 37 |
* 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
|
| 38 |
* and "The Regents of the University of California" must
|
| 39 |
* not be used to endorse or promote products derived from this
|
| 40 |
* software without prior written permission. For written
|
| 41 |
* permission, please contact [email protected].
|
| 42 |
*
|
| 43 |
* 5. Products derived from this software may not be called "Radiance",
|
| 44 |
* nor may "Radiance" appear in their name, without prior written
|
| 45 |
* permission of Lawrence Berkeley National Laboratory.
|
| 46 |
*
|
| 47 |
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
|
| 48 |
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
| 49 |
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
| 50 |
* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR
|
| 51 |
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
| 52 |
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
| 53 |
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
|
| 54 |
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
| 55 |
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
| 56 |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
| 57 |
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
| 58 |
* SUCH DAMAGE.
|
| 59 |
* ====================================================================
|
| 60 |
*
|
| 61 |
* This software consists of voluntary contributions made by many
|
| 62 |
* individuals on behalf of Lawrence Berkeley National Laboratory. For more
|
| 63 |
* information on Lawrence Berkeley National Laboratory, please see
|
| 64 |
* <http://www.lbl.gov/>.
|
| 65 |
*/
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| 66 |
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| 67 |
#define LOGLUV_PUBLIC 1
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| 68 |
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| 69 |
#include <stdio.h>
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| 70 |
#include <string.h>
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| 71 |
#include <math.h>
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| 72 |
#include "tiffio.h"
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| 73 |
#include "tmprivat.h"
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| 74 |
#include "tmaptiff.h"
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| 75 |
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| 76 |
#ifndef BSD
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| 77 |
#define bzero(d,n) (void)memset(d,0,n)
|
| 78 |
#endif
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| 79 |
#define uvflgop(p,uv,op) ((p)->rgbflg[(uv)>>5] op (1L<<((uv)&0x1f)))
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| 80 |
#define isuvset(p,uv) uvflgop(p,uv,&)
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| 81 |
#define setuv(p,uv) uvflgop(p,uv,|=)
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| 82 |
#define clruv(p,uv) uvflgop(p,uv,&=~)
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| 83 |
#define clruvall(p) bzero((MEM_PTR)(p)->rgbflg,sizeof((p)->rgbflg))
|
| 84 |
|
| 85 |
#ifdef NOPROTO
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| 86 |
static MEM_PTR luv32Init();
|
| 87 |
static void luv32NewSpace();
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| 88 |
static MEM_PTR luv24Init();
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| 89 |
static void luv24NewSpace();
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| 90 |
#else
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static MEM_PTR luv32Init(struct tmStruct *);
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static void luv32NewSpace(struct tmStruct *);
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static MEM_PTR luv24Init(struct tmStruct *);
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static void luv24NewSpace(struct tmStruct *);
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#endif
|
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typedef struct {
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| 98 |
int offset; /* computed luminance offset */
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| 99 |
BYTE rgbval[1<<16][3]; /* computed RGB value for given uv */
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uint32 rgbflg[1<<(16-5)]; /* flags for computed values */
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| 101 |
} LUV32DATA; /* LogLuv 32-bit conversion data */
|
| 102 |
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| 103 |
#define UVNEU ((int)(UVSCALE*U_NEU)<<8 \
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| 104 |
| (int)(UVSCALE*V_NEU))
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| 105 |
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| 106 |
static struct tmPackage luv32Pkg = { /* 32-bit package functions */
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| 107 |
luv32Init, luv32NewSpace, free
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};
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static int luv32Reg = -1; /* 32-bit package reg. number */
|
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|
| 111 |
typedef struct {
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int offset; /* computed luminance offset */
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BYTE rgbval[1<<14][3]; /* computed rgb value for uv index */
|
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uint32 rgbflg[1<<(14-5)]; /* flags for computed values */
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| 115 |
} LUV24DATA; /* LogLuv 24-bit conversion data */
|
| 116 |
|
| 117 |
static struct tmPackage luv24Pkg = { /* 24-bit package functions */
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luv24Init, luv24NewSpace, free
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};
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static int luv24Reg = -1; /* 24-bit package reg. number */
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| 121 |
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static int uv14neu = -1; /* neutral index for 14-bit (u',v') */
|
| 123 |
|
| 124 |
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| 125 |
static void
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uv2rgb(rgb, tm, uvp) /* compute RGB from uv coordinate */
|
| 127 |
BYTE rgb[3];
|
| 128 |
register struct tmStruct *tm;
|
| 129 |
double uvp[2];
|
| 130 |
{ /* Should check that tm->inppri==TM_XYZPRIM beforehand... */
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| 131 |
double d, x, y;
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| 132 |
COLOR XYZ, RGB;
|
| 133 |
/* convert to XYZ */
|
| 134 |
d = 1./(6.*uvp[0] - 16.*uvp[1] + 12.);
|
| 135 |
x = 9.*uvp[0] * d;
|
| 136 |
y = 4.*uvp[1] * d;
|
| 137 |
XYZ[CIEY] = 1./tm->inpsf;
|
| 138 |
XYZ[CIEX] = x/y * XYZ[CIEY];
|
| 139 |
XYZ[CIEZ] = (1.-x-y)/y * XYZ[CIEY];
|
| 140 |
/* convert to RGB and clip */
|
| 141 |
colortrans(RGB, tm->cmat, XYZ);
|
| 142 |
clipgamut(RGB, 1., CGAMUT_LOWER, cblack, cwhite);
|
| 143 |
/* perform final scaling & gamma */
|
| 144 |
d = tm->clf[RED] * RGB[RED];
|
| 145 |
rgb[RED] = d>=.999 ? 255 : (int)(256.*pow(d, 1./tm->mongam));
|
| 146 |
d = tm->clf[GRN] * RGB[GRN];
|
| 147 |
rgb[GRN] = d>=.999 ? 255 : (int)(256.*pow(d, 1./tm->mongam));
|
| 148 |
d = tm->clf[BLU] * RGB[BLU];
|
| 149 |
rgb[BLU] = d>=.999 ? 255 : (int)(256.*pow(d, 1./tm->mongam));
|
| 150 |
}
|
| 151 |
|
| 152 |
|
| 153 |
static TMbright
|
| 154 |
compmeshift(li, uvp) /* compute mesopic color shift */
|
| 155 |
TMbright li; /* encoded world luminance */
|
| 156 |
double uvp[2]; /* world (u',v') -> returned desaturated */
|
| 157 |
{
|
| 158 |
double scotrat;
|
| 159 |
register double d;
|
| 160 |
|
| 161 |
if (li >= BMESUPPER)
|
| 162 |
return(li);
|
| 163 |
scotrat = (.767676768 - 1.02356902*uvp[1])/uvp[0] - .343434343;
|
| 164 |
if (li <= BMESLOWER) {
|
| 165 |
d = 0.;
|
| 166 |
uvp[0] = U_NEU; uvp[1] = V_NEU;
|
| 167 |
} else {
|
| 168 |
d = (tmMesofact[li-BMESLOWER] + .5) * (1./256.);
|
| 169 |
uvp[0] = d*uvp[0] + (1.-d)*U_NEU;
|
| 170 |
uvp[1] = d*uvp[1] + (1.-d)*V_NEU;
|
| 171 |
}
|
| 172 |
/*
|
| 173 |
d = li + (double)TM_BRTSCALE*log(d + (1.-d)*scotrat);
|
| 174 |
*/
|
| 175 |
d = d + (1.-d)*scotrat;
|
| 176 |
d -= 1.; /* Taylor expansion of log(x) about 1 */
|
| 177 |
d = d*(1. + d*(-.5 + d*(1./3. + d*-.125)));
|
| 178 |
d = li + (double)TM_BRTSCALE*d;
|
| 179 |
return((TMbright)(d>0. ? d+.5 : d-.5));
|
| 180 |
}
|
| 181 |
|
| 182 |
|
| 183 |
int
|
| 184 |
tmCvLuv32(ls, cs, luvs, len) /* convert raw 32-bit LogLuv values */
|
| 185 |
TMbright *ls;
|
| 186 |
BYTE *cs;
|
| 187 |
uint32 *luvs;
|
| 188 |
int len;
|
| 189 |
{
|
| 190 |
static char funcName[] = "tmCvLuv32";
|
| 191 |
double uvp[2];
|
| 192 |
register LUV32DATA *ld;
|
| 193 |
register int i, j;
|
| 194 |
/* check arguments */
|
| 195 |
if (tmTop == NULL)
|
| 196 |
returnErr(TM_E_TMINVAL);
|
| 197 |
if (ls == NULL | luvs == NULL | len < 0)
|
| 198 |
returnErr(TM_E_ILLEGAL);
|
| 199 |
/* check package registration */
|
| 200 |
if (luv32Reg < 0) {
|
| 201 |
if ((luv32Reg = tmRegPkg(&luv32Pkg)) < 0)
|
| 202 |
returnErr(TM_E_CODERR1);
|
| 203 |
tmMkMesofact();
|
| 204 |
}
|
| 205 |
/* get package data */
|
| 206 |
if ((ld = (LUV32DATA *)tmPkgData(tmTop,luv32Reg)) == NULL)
|
| 207 |
returnErr(TM_E_NOMEM);
|
| 208 |
/* convert each pixel */
|
| 209 |
for (i = len; i--; ) {
|
| 210 |
j = luvs[i] >> 16; /* get luminance */
|
| 211 |
if (j & 0x8000) /* negative luminance */
|
| 212 |
ls[i] = TM_NOBRT; /* assign bogus value */
|
| 213 |
else /* else convert to lnL */
|
| 214 |
ls[i] = (BRT2SCALE(j) >> 8) - ld->offset;
|
| 215 |
if (cs == TM_NOCHROM) /* no color? */
|
| 216 |
continue;
|
| 217 |
/* get chrominance */
|
| 218 |
if (tmTop->flags & TM_F_MESOPIC && ls[i] < BMESUPPER) {
|
| 219 |
uvp[0] = 1./UVSCALE*((luvs[i]>>8 & 0xff) + .5);
|
| 220 |
uvp[1] = 1./UVSCALE*((luvs[i] & 0xff) + .5);
|
| 221 |
ls[i] = compmeshift(ls[i], uvp);
|
| 222 |
j = tmTop->flags&TM_F_BW || ls[i]<BMESLOWER
|
| 223 |
? UVNEU
|
| 224 |
: (int)(uvp[0]*UVSCALE)<<8
|
| 225 |
| (int)(uvp[1]*UVSCALE);
|
| 226 |
} else {
|
| 227 |
j = tmTop->flags&TM_F_BW ? UVNEU : luvs[i]&0xffff;
|
| 228 |
}
|
| 229 |
if (!isuvset(ld, j)) {
|
| 230 |
uvp[0] = 1./UVSCALE*((j>>8) + .5);
|
| 231 |
uvp[1] = 1./UVSCALE*((j & 0xff) + .5);
|
| 232 |
uv2rgb(ld->rgbval[j], tmTop, uvp);
|
| 233 |
setuv(ld, j);
|
| 234 |
}
|
| 235 |
cs[3*i ] = ld->rgbval[j][RED];
|
| 236 |
cs[3*i+1] = ld->rgbval[j][GRN];
|
| 237 |
cs[3*i+2] = ld->rgbval[j][BLU];
|
| 238 |
}
|
| 239 |
returnOK;
|
| 240 |
}
|
| 241 |
|
| 242 |
|
| 243 |
int
|
| 244 |
tmCvLuv24(ls, cs, luvs, len) /* convert raw 24-bit LogLuv values */
|
| 245 |
TMbright *ls;
|
| 246 |
BYTE *cs;
|
| 247 |
uint32 *luvs;
|
| 248 |
int len;
|
| 249 |
{
|
| 250 |
char funcName[] = "tmCvLuv24";
|
| 251 |
double uvp[2];
|
| 252 |
register LUV24DATA *ld;
|
| 253 |
register int i, j;
|
| 254 |
/* check arguments */
|
| 255 |
if (tmTop == NULL)
|
| 256 |
returnErr(TM_E_TMINVAL);
|
| 257 |
if (ls == NULL | luvs == NULL | len < 0)
|
| 258 |
returnErr(TM_E_ILLEGAL);
|
| 259 |
/* check package registration */
|
| 260 |
if (luv24Reg < 0) {
|
| 261 |
if ((luv24Reg = tmRegPkg(&luv24Pkg)) < 0)
|
| 262 |
returnErr(TM_E_CODERR1);
|
| 263 |
tmMkMesofact();
|
| 264 |
}
|
| 265 |
/* get package data */
|
| 266 |
if ((ld = (LUV24DATA *)tmPkgData(tmTop,luv24Reg)) == NULL)
|
| 267 |
returnErr(TM_E_NOMEM);
|
| 268 |
/* convert each pixel */
|
| 269 |
for (i = len; i--; ) {
|
| 270 |
j = luvs[i] >> 14; /* get luminance */
|
| 271 |
ls[i] = (BRT2SCALE(j) >> 6) - ld->offset;
|
| 272 |
if (cs == TM_NOCHROM) /* no color? */
|
| 273 |
continue;
|
| 274 |
/* get chrominance */
|
| 275 |
if (tmTop->flags & TM_F_MESOPIC && ls[i] < BMESUPPER) {
|
| 276 |
if (uv_decode(uvp, uvp+1, luvs[i]&0x3fff) < 0) {
|
| 277 |
uvp[0] = U_NEU; /* should barf? */
|
| 278 |
uvp[1] = V_NEU;
|
| 279 |
}
|
| 280 |
ls[i] = compmeshift(ls[i], uvp);
|
| 281 |
if (tmTop->flags&TM_F_BW || ls[i]<BMESLOWER
|
| 282 |
|| (j = uv_encode(uvp[0], uvp[1],
|
| 283 |
SGILOGENCODE_NODITHER)) < 0)
|
| 284 |
j = uv14neu;
|
| 285 |
} else {
|
| 286 |
j = tmTop->flags&TM_F_BW ? uv14neu : luvs[i]&0x3fff;
|
| 287 |
}
|
| 288 |
if (!isuvset(ld, j)) {
|
| 289 |
if (uv_decode(&uvp[0], &uvp[1], j) < 0) {
|
| 290 |
uvp[0] = U_NEU; uvp[1] = V_NEU;
|
| 291 |
}
|
| 292 |
uv2rgb(ld->rgbval[j], tmTop, uvp);
|
| 293 |
setuv(ld, j);
|
| 294 |
}
|
| 295 |
cs[3*i ] = ld->rgbval[j][RED];
|
| 296 |
cs[3*i+1] = ld->rgbval[j][GRN];
|
| 297 |
cs[3*i+2] = ld->rgbval[j][BLU];
|
| 298 |
}
|
| 299 |
returnOK;
|
| 300 |
}
|
| 301 |
|
| 302 |
|
| 303 |
int
|
| 304 |
tmCvL16(ls, l16s, len) /* convert 16-bit LogL values */
|
| 305 |
TMbright *ls;
|
| 306 |
uint16 *l16s;
|
| 307 |
int len;
|
| 308 |
{
|
| 309 |
static char funcName[] = "tmCvL16";
|
| 310 |
static double lastsf;
|
| 311 |
static int offset;
|
| 312 |
register int i;
|
| 313 |
/* check arguments */
|
| 314 |
if (tmTop == NULL)
|
| 315 |
returnErr(TM_E_TMINVAL);
|
| 316 |
if (ls == NULL | l16s == NULL | len < 0)
|
| 317 |
returnErr(TM_E_ILLEGAL);
|
| 318 |
/* check scaling offset */
|
| 319 |
if (!FEQ(tmTop->inpsf, lastsf)) {
|
| 320 |
offset = BRT2SCALE(64);
|
| 321 |
if (tmTop->inpsf > 1.0001)
|
| 322 |
offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)+.5);
|
| 323 |
else if (tmTop->inpsf < 0.9999)
|
| 324 |
offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)-.5);
|
| 325 |
lastsf = tmTop->inpsf;
|
| 326 |
}
|
| 327 |
/* convert each pixel */
|
| 328 |
for (i = len; i--; ) {
|
| 329 |
if (l16s[i] & 0x8000) /* negative luminance */
|
| 330 |
ls[i] = TM_NOBRT; /* assign bogus value */
|
| 331 |
else /* else convert to lnL */
|
| 332 |
ls[i] = (BRT2SCALE(l16s[i]) >> 8) - offset;
|
| 333 |
}
|
| 334 |
returnOK;
|
| 335 |
}
|
| 336 |
|
| 337 |
|
| 338 |
static void
|
| 339 |
luv32NewSpace(tm) /* initialize 32-bit LogLuv color space */
|
| 340 |
struct tmStruct *tm;
|
| 341 |
{
|
| 342 |
register LUV32DATA *ld;
|
| 343 |
|
| 344 |
if (tm->inppri != TM_XYZPRIM) { /* panic time! */
|
| 345 |
fputs("Improper input color space in luv32NewSpace!\n", stderr);
|
| 346 |
exit(1);
|
| 347 |
}
|
| 348 |
ld = (LUV32DATA *)tm->pd[luv32Reg];
|
| 349 |
ld->offset = BRT2SCALE(64);
|
| 350 |
if (tm->inpsf > 1.0001)
|
| 351 |
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)+.5);
|
| 352 |
else if (tm->inpsf < 0.9999)
|
| 353 |
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)-.5);
|
| 354 |
clruvall(ld);
|
| 355 |
}
|
| 356 |
|
| 357 |
|
| 358 |
static MEM_PTR
|
| 359 |
luv32Init(tm) /* allocate data for 32-bit LogLuv decoder */
|
| 360 |
struct tmStruct *tm;
|
| 361 |
{
|
| 362 |
register LUV32DATA *ld;
|
| 363 |
|
| 364 |
ld = (LUV32DATA *)malloc(sizeof(LUV32DATA));
|
| 365 |
if (ld == NULL)
|
| 366 |
return(NULL);
|
| 367 |
tm->pd[luv32Reg] = (MEM_PTR)ld;
|
| 368 |
luv32NewSpace(tm);
|
| 369 |
return((MEM_PTR)ld);
|
| 370 |
}
|
| 371 |
|
| 372 |
|
| 373 |
static void
|
| 374 |
luv24NewSpace(tm) /* initialize 24-bit LogLuv color space */
|
| 375 |
struct tmStruct *tm;
|
| 376 |
{
|
| 377 |
register LUV24DATA *ld;
|
| 378 |
|
| 379 |
if (tm->inppri != TM_XYZPRIM) { /* panic time! */
|
| 380 |
fputs("Improper input color space in luv24NewSpace!\n", stderr);
|
| 381 |
exit(1);
|
| 382 |
}
|
| 383 |
ld = (LUV24DATA *)tm->pd[luv24Reg];
|
| 384 |
ld->offset = BRT2SCALE(12);
|
| 385 |
if (tm->inpsf > 1.0001)
|
| 386 |
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)+.5);
|
| 387 |
else if (tm->inpsf < 0.9999)
|
| 388 |
ld->offset -= (int)(TM_BRTSCALE*log(tmTop->inpsf)-.5);
|
| 389 |
clruvall(ld);
|
| 390 |
}
|
| 391 |
|
| 392 |
|
| 393 |
static MEM_PTR
|
| 394 |
luv24Init(tm) /* allocate data for 24-bit LogLuv decoder */
|
| 395 |
struct tmStruct *tm;
|
| 396 |
{
|
| 397 |
register LUV24DATA *ld;
|
| 398 |
|
| 399 |
ld = (LUV24DATA *)malloc(sizeof(LUV24DATA));
|
| 400 |
if (ld == NULL)
|
| 401 |
return(NULL);
|
| 402 |
tm->pd[luv24Reg] = (MEM_PTR)ld;
|
| 403 |
if (uv14neu < 0) /* initialize neutral color index */
|
| 404 |
uv14neu = uv_encode(U_NEU, V_NEU, SGILOGENCODE_NODITHER);
|
| 405 |
luv24NewSpace(tm);
|
| 406 |
return((MEM_PTR)ld);
|
| 407 |
}
|
