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greg |
3.1 |
/* Copyright (c) 1997 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* Tone mapping functions.
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* See tonemap.h for detailed function descriptions.
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*/
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#include <stdio.h>
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#include <math.h>
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#include "tmprivat.h"
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#include "tmerrmsg.h"
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#define exp10(x) exp(M_LN10*(x))
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struct tmStruct *tmTop = NULL; /* current tone mapping stack */
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greg |
3.4 |
/* our list of conversion packages */
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struct tmPackage *tmPkg[TM_MAXPKG];
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int tmNumPkgs = 0; /* number of registered packages */
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greg |
3.1 |
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greg |
3.4 |
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greg |
3.1 |
int
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tmErrorReturn(func, err) /* error return (with message) */
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char *func;
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int err;
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{
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greg |
3.2 |
if (tmTop != NULL && tmTop->flags & TM_F_NOSTDERR)
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greg |
3.1 |
return(err);
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fputs(func, stderr);
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fputs(": ", stderr);
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fputs(tmErrorMessage[err], stderr);
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fputs("!\n", stderr);
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return(err);
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}
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struct tmStruct *
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tmInit(flags, monpri, gamval) /* initialize new tone mapping */
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int flags;
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RGBPRIMP monpri;
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double gamval;
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{
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static char funcName[] = "tmInit";
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COLORMAT cmat;
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register struct tmStruct *tmnew;
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register int i;
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/* allocate structure */
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tmnew = (struct tmStruct *)malloc(sizeof(struct tmStruct));
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if (tmnew == NULL)
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return(NULL);
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tmnew->flags = flags & ~TM_F_UNIMPL;
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/* set monitor transform */
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if (monpri == NULL || monpri == stdprims || tmnew->flags & TM_F_BW) {
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tmnew->monpri = stdprims;
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tmnew->clf[RED] = rgb2xyzmat[1][0];
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tmnew->clf[GRN] = rgb2xyzmat[1][1];
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tmnew->clf[BLU] = rgb2xyzmat[1][2];
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} else {
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comprgb2xyzmat(cmat, tmnew->monpri=monpri);
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tmnew->clf[RED] = cmat[1][0];
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tmnew->clf[GRN] = cmat[1][1];
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tmnew->clf[BLU] = cmat[1][2];
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}
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/* set gamma value */
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if (gamval < MINGAM)
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tmnew->mongam = DEFGAM;
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else
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tmnew->mongam = gamval;
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greg |
3.4 |
/* set color divisors */
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for (i = 0; i < 3; i++)
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tmnew->cdiv[i] = 256.*pow(tmnew->clf[i], 1./tmnew->mongam);
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greg |
3.1 |
/* set input transform */
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tmnew->inppri = tmnew->monpri;
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tmnew->cmat[0][0] = tmnew->cmat[1][1] = tmnew->cmat[2][2] =
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tmnew->inpsf = WHTEFFICACY;
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tmnew->cmat[0][1] = tmnew->cmat[0][2] = tmnew->cmat[1][0] =
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tmnew->cmat[1][2] = tmnew->cmat[2][0] = tmnew->cmat[2][1] = 0.;
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tmnew->brmin = tmnew->brmax = 0;
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tmnew->histo = NULL;
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tmnew->lumap = NULL;
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greg |
3.4 |
/* zero private data */
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for (i = TM_MAXPKG; i--; )
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tmnew->pd[i] = NULL;
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/* make tmnew current */
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greg |
3.1 |
tmnew->tmprev = tmTop;
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return(tmTop = tmnew);
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}
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int
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tmSetSpace(pri, sf) /* set input color space for conversions */
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RGBPRIMP pri;
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double sf;
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{
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static char funcName[] = "tmSetSpace";
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register int i, j;
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/* error check */
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if (tmTop == NULL)
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returnErr(TM_E_TMINVAL);
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if (sf <= 1e-12)
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returnErr(TM_E_ILLEGAL);
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/* check if no change */
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if (pri == tmTop->inppri && FEQ(sf, tmTop->inpsf))
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returnOK;
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tmTop->inppri = pri; /* let's set it */
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tmTop->inpsf = sf;
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if (tmTop->flags & TM_F_BW) { /* color doesn't matter */
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tmTop->monpri = tmTop->inppri; /* eliminate xform */
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if (tmTop->inppri == TM_XYZPRIM) {
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tmTop->clf[CIEX] = tmTop->clf[CIEZ] = 0.;
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tmTop->clf[CIEY] = 1.;
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} else {
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comprgb2xyzmat(tmTop->cmat, tmTop->monpri);
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tmTop->clf[RED] = tmTop->cmat[1][0];
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tmTop->clf[GRN] = tmTop->cmat[1][1];
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tmTop->clf[BLU] = tmTop->cmat[1][2];
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}
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tmTop->cmat[0][0] = tmTop->cmat[1][1] = tmTop->cmat[2][2] =
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tmTop->inpsf;
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tmTop->cmat[0][1] = tmTop->cmat[0][2] = tmTop->cmat[1][0] =
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tmTop->cmat[1][2] = tmTop->cmat[2][0] = tmTop->cmat[2][1] = 0.;
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} else if (tmTop->inppri == TM_XYZPRIM) /* input is XYZ */
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compxyz2rgbmat(tmTop->cmat, tmTop->monpri);
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else { /* input is RGB */
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if (tmTop->inppri != tmTop->monpri &&
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PRIMEQ(tmTop->inppri, tmTop->monpri))
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tmTop->inppri = tmTop->monpri; /* no xform */
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comprgb2rgbmat(tmTop->cmat, tmTop->inppri, tmTop->monpri);
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}
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for (i = 0; i < 3; i++)
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for (j = 0; j < 3; j++)
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tmTop->cmat[i][j] *= tmTop->inpsf;
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greg |
3.4 |
/* set color divisors */
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for (i = 0; i < 3; i++)
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if (tmTop->clf[i] > .001)
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tmTop->cdiv[i] =
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256.*pow(tmTop->clf[i], 1./tmTop->mongam);
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else
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tmTop->cdiv[i] = 1;
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/* notify packages */
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for (i = tmNumPkgs; i--; )
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if (tmTop->pd[i] != NULL && tmPkg[i]->NewSpace != NULL)
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(*tmPkg[i]->NewSpace)(tmTop);
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greg |
3.1 |
returnOK;
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}
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void
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tmClearHisto() /* clear current histogram */
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{
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if (tmTop == NULL || tmTop->histo == NULL)
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return;
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greg |
3.4 |
free((MEM_PTR)tmTop->histo);
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greg |
3.1 |
tmTop->histo = NULL;
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}
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int
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tmCvColors(ls, cs, scan, len) /* convert float colors */
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TMbright *ls;
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BYTE *cs;
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COLOR *scan;
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int len;
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{
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static char funcName[] = "tmCvColors";
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greg |
3.4 |
static COLOR csmall = {1e-6, 1e-6, 1e-6};
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greg |
3.1 |
COLOR cmon;
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double lum, slum;
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register double d;
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register int i;
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if (tmTop == NULL)
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returnErr(TM_E_TMINVAL);
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if (ls == NULL | scan == NULL | len <= 0)
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returnErr(TM_E_ILLEGAL);
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for (i = len; i--; ) {
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greg |
3.4 |
if (tmNeedMatrix(tmTop)) /* get monitor RGB */
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greg |
3.1 |
colortrans(cmon, tmTop->cmat, scan[i]);
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else {
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cmon[RED] = tmTop->inpsf*scan[i][RED];
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cmon[GRN] = tmTop->inpsf*scan[i][GRN];
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cmon[BLU] = tmTop->inpsf*scan[i][BLU];
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}
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/* world luminance */
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lum = tmTop->clf[RED]*cmon[RED] +
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tmTop->clf[GRN]*cmon[GRN] +
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tmTop->clf[BLU]*cmon[BLU] ;
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/* check range */
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greg |
3.4 |
if (clipgamut(cmon, lum, CGAMUT_LOWER, csmall, cwhite))
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greg |
3.1 |
lum = tmTop->clf[RED]*cmon[RED] +
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tmTop->clf[GRN]*cmon[GRN] +
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tmTop->clf[BLU]*cmon[BLU] ;
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if (lum < MINLUM) {
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ls[i] = MINBRT-1; /* bogus value */
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lum = MINLUM;
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} else {
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d = TM_BRTSCALE*log(lum); /* encode it */
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ls[i] = d>0. ? (int)(d+.5) : (int)(d-.5);
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}
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if (cs == TM_NOCHROM) /* no color? */
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continue;
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if (tmTop->flags & TM_F_MESOPIC && lum < LMESUPPER) {
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slum = scotlum(cmon); /* mesopic adj. */
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if (lum < LMESLOWER)
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cmon[RED] = cmon[GRN] = cmon[BLU] = slum;
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else {
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d = (lum - LMESLOWER)/(LMESUPPER - LMESLOWER);
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if (tmTop->flags & TM_F_BW)
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cmon[RED] = cmon[GRN] =
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cmon[BLU] = d*lum;
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else
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scalecolor(cmon, d);
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d = (1.-d)*slum;
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| 223 |
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cmon[RED] += d;
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| 224 |
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cmon[GRN] += d;
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cmon[BLU] += d;
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| 226 |
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}
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| 227 |
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} else if (tmTop->flags & TM_F_BW) {
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cmon[RED] = cmon[GRN] = cmon[BLU] = lum;
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}
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d = tmTop->clf[RED]*cmon[RED]/lum;
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| 231 |
greg |
3.4 |
cs[3*i ] = d>=.999 ? 255 :
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(int)(256.*pow(d, 1./tmTop->mongam));
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| 233 |
greg |
3.1 |
d = tmTop->clf[GRN]*cmon[GRN]/lum;
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| 234 |
greg |
3.4 |
cs[3*i+1] = d>=.999 ? 255 :
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| 235 |
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(int)(256.*pow(d, 1./tmTop->mongam));
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| 236 |
greg |
3.1 |
d = tmTop->clf[BLU]*cmon[BLU]/lum;
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| 237 |
greg |
3.4 |
cs[3*i+2] = d>=.999 ? 255 :
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| 238 |
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(int)(256.*pow(d, 1./tmTop->mongam));
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| 239 |
greg |
3.1 |
}
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| 240 |
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returnOK;
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| 241 |
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}
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| 242 |
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| 243 |
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| 244 |
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int
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| 245 |
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tmAddHisto(ls, len, wt) /* add values to histogram */
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| 246 |
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register TMbright *ls;
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| 247 |
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int len;
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| 248 |
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int wt;
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| 249 |
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{
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| 250 |
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static char funcName[] = "tmAddHisto";
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| 251 |
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int sum, oldorig, oldlen, horig, hlen;
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| 252 |
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register int i, j;
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| 253 |
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| 254 |
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if (len <= 0)
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| 255 |
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returnErr(TM_E_ILLEGAL);
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| 256 |
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if (tmTop == NULL)
|
| 257 |
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returnErr(TM_E_TMINVAL);
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| 258 |
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/* first, grow limits */
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| 259 |
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if (tmTop->histo == NULL) {
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| 260 |
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for (i = len; i-- && ls[i] < MINBRT; )
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| 261 |
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;
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| 262 |
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if (i < 0)
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| 263 |
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returnOK;
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| 264 |
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tmTop->brmin = tmTop->brmax = ls[i];
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| 265 |
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oldlen = 0;
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| 266 |
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} else {
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| 267 |
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oldorig = (tmTop->brmin-MINBRT)/HISTEP;
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| 268 |
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oldlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - oldorig;
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| 269 |
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}
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| 270 |
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for (i = len; i--; ) {
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| 271 |
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if ((j = ls[i]) < MINBRT)
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| 272 |
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continue;
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| 273 |
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if (j < tmTop->brmin)
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| 274 |
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tmTop->brmin = j;
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| 275 |
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else if (j > tmTop->brmax)
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| 276 |
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tmTop->brmax = j;
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| 277 |
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}
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| 278 |
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horig = (tmTop->brmin-MINBRT)/HISTEP;
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| 279 |
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hlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - horig;
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| 280 |
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if (hlen > oldlen) { /* (re)allocate histogram */
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| 281 |
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register int *newhist = (int *)calloc(hlen, sizeof(int));
|
| 282 |
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if (newhist == NULL)
|
| 283 |
|
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returnErr(TM_E_NOMEM);
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| 284 |
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if (oldlen) { /* copy and free old */
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| 285 |
greg |
3.2 |
for (i = oldlen, j = i+oldorig-horig; i; )
|
| 286 |
|
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newhist[--j] = tmTop->histo[--i];
|
| 287 |
greg |
3.4 |
free((MEM_PTR)tmTop->histo);
|
| 288 |
greg |
3.1 |
}
|
| 289 |
|
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tmTop->histo = newhist;
|
| 290 |
|
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if (tmTop->lumap != NULL) { /* invalid tone map */
|
| 291 |
greg |
3.4 |
free((MEM_PTR)tmTop->lumap);
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| 292 |
greg |
3.1 |
tmTop->lumap = NULL;
|
| 293 |
|
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}
|
| 294 |
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}
|
| 295 |
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if (wt == 0)
|
| 296 |
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returnOK;
|
| 297 |
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for (i = len; i--; ) /* add in new counts */
|
| 298 |
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if (ls[i] >= MINBRT)
|
| 299 |
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tmTop->histo[ (ls[i]-MINBRT)/HISTEP - horig ] += wt;
|
| 300 |
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returnOK;
|
| 301 |
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}
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| 302 |
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| 303 |
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| 304 |
|
|
static double
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| 305 |
|
|
htcontrs(La) /* human threshold contrast sensitivity, dL(La) */
|
| 306 |
|
|
double La;
|
| 307 |
|
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{
|
| 308 |
|
|
double l10La, l10dL;
|
| 309 |
|
|
/* formula taken from Ferwerda et al. [SG96] */
|
| 310 |
|
|
if (La < 1.148e-4)
|
| 311 |
|
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return(1.38e-3);
|
| 312 |
|
|
l10La = log10(La);
|
| 313 |
|
|
if (l10La < -1.44) /* rod response regime */
|
| 314 |
|
|
l10dL = pow(.405*l10La + 1.6, 2.18) - 2.86;
|
| 315 |
|
|
else if (l10La < -.0184)
|
| 316 |
|
|
l10dL = l10La - .395;
|
| 317 |
|
|
else if (l10La < 1.9) /* cone response regime */
|
| 318 |
|
|
l10dL = pow(.249*l10La + .65, 2.7) - .72;
|
| 319 |
|
|
else
|
| 320 |
|
|
l10dL = l10La - 1.255;
|
| 321 |
|
|
|
| 322 |
|
|
return(exp10(l10dL));
|
| 323 |
|
|
}
|
| 324 |
|
|
|
| 325 |
|
|
|
| 326 |
|
|
int
|
| 327 |
|
|
tmComputeMapping(gamval, Lddyn, Ldmax)
|
| 328 |
|
|
double gamval;
|
| 329 |
|
|
double Lddyn;
|
| 330 |
|
|
double Ldmax;
|
| 331 |
|
|
{
|
| 332 |
|
|
static char funcName[] = "tmComputeMapping";
|
| 333 |
|
|
int *histo;
|
| 334 |
|
|
float *cumf;
|
| 335 |
|
|
int brt0, histlen, histot, threshold, ceiling, trimmings;
|
| 336 |
|
|
double logLddyn, Ldmin, Ldavg, Lwavg, Tr, Lw, Ld;
|
| 337 |
|
|
int4 sum;
|
| 338 |
|
|
register double d;
|
| 339 |
|
|
register int i, j;
|
| 340 |
|
|
|
| 341 |
|
|
if (tmTop == NULL || tmTop->histo == NULL)
|
| 342 |
|
|
returnErr(TM_E_TMINVAL);
|
| 343 |
|
|
/* check arguments */
|
| 344 |
|
|
if (Lddyn < MINLDDYN) Lddyn = DEFLDDYN;
|
| 345 |
|
|
if (Ldmax < MINLDMAX) Ldmax = DEFLDMAX;
|
| 346 |
|
|
if (gamval < MINGAM) gamval = tmTop->mongam;
|
| 347 |
|
|
/* compute handy values */
|
| 348 |
|
|
Ldmin = Ldmax/Lddyn;
|
| 349 |
|
|
logLddyn = log(Lddyn);
|
| 350 |
|
|
Ldavg = sqrt(Ldmax*Ldmin);
|
| 351 |
|
|
i = (tmTop->brmin-MINBRT)/HISTEP;
|
| 352 |
|
|
brt0 = MINBRT + HISTEP/2 + i*HISTEP;
|
| 353 |
|
|
histlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - i;
|
| 354 |
|
|
/* histogram total and mean */
|
| 355 |
|
|
histot = 0; sum = 0;
|
| 356 |
|
|
j = brt0 + histlen*HISTEP;
|
| 357 |
|
|
for (i = histlen; i--; ) {
|
| 358 |
greg |
3.2 |
histot += tmTop->histo[i];
|
| 359 |
|
|
sum += (j -= HISTEP) * tmTop->histo[i];
|
| 360 |
greg |
3.1 |
}
|
| 361 |
|
|
threshold = histot*.025 + .5;
|
| 362 |
|
|
if (threshold < 4)
|
| 363 |
|
|
returnErr(TM_E_TMFAIL);
|
| 364 |
|
|
Lwavg = tmLuminance( (double)sum / histot );
|
| 365 |
greg |
3.2 |
if (!(tmTop->flags & TM_F_LINEAR)) { /* clamp histogram */
|
| 366 |
|
|
histo = (int *)malloc(histlen*sizeof(int));
|
| 367 |
|
|
cumf = (float *)malloc((histlen+1)*sizeof(float));
|
| 368 |
|
|
if (histo == NULL | cumf == NULL)
|
| 369 |
|
|
returnErr(TM_E_NOMEM);
|
| 370 |
|
|
for (i = histlen; i--; ) /* make malleable copy */
|
| 371 |
|
|
histo[i] = tmTop->histo[i];
|
| 372 |
|
|
do { /* iterate to solution */
|
| 373 |
|
|
sum = 0; /* cumulative probability */
|
| 374 |
|
|
for (i = 0; i < histlen; i++) {
|
| 375 |
|
|
cumf[i] = (double)sum/histot;
|
| 376 |
|
|
sum += histo[i];
|
| 377 |
|
|
}
|
| 378 |
|
|
cumf[i] = 1.;
|
| 379 |
|
|
Tr = histot * (double)(tmTop->brmax - tmTop->brmin) /
|
| 380 |
greg |
3.1 |
((double)histlen*TM_BRTSCALE) / logLddyn;
|
| 381 |
greg |
3.2 |
ceiling = Tr + 1.;
|
| 382 |
|
|
trimmings = 0; /* clip to envelope */
|
| 383 |
|
|
for (i = histlen; i--; ) {
|
| 384 |
|
|
if (tmTop->flags & TM_F_HCONTR) {
|
| 385 |
|
|
Lw = tmLuminance(brt0 + i*HISTEP);
|
| 386 |
|
|
Ld = Ldmin * exp( logLddyn *
|
| 387 |
greg |
3.1 |
.5*(cumf[i]+cumf[i+1]) );
|
| 388 |
greg |
3.2 |
ceiling = Tr * (htcontrs(Ld) * Lw) /
|
| 389 |
greg |
3.1 |
(htcontrs(Lw) * Ld) + 1.;
|
| 390 |
greg |
3.2 |
}
|
| 391 |
|
|
if (histo[i] > ceiling) {
|
| 392 |
|
|
trimmings += histo[i] - ceiling;
|
| 393 |
|
|
histo[i] = ceiling;
|
| 394 |
|
|
}
|
| 395 |
greg |
3.1 |
}
|
| 396 |
greg |
3.2 |
} while ((histot -= trimmings) > threshold &&
|
| 397 |
|
|
trimmings > threshold);
|
| 398 |
|
|
}
|
| 399 |
|
|
/* allocate luminance map */
|
| 400 |
|
|
if (tmTop->lumap == NULL) {
|
| 401 |
greg |
3.1 |
tmTop->lumap = (unsigned short *)malloc(
|
| 402 |
|
|
(tmTop->brmax-tmTop->brmin+1)*sizeof(unsigned short) );
|
| 403 |
|
|
if (tmTop->lumap == NULL)
|
| 404 |
|
|
returnErr(TM_E_NOMEM);
|
| 405 |
|
|
}
|
| 406 |
|
|
if (tmTop->flags & TM_F_LINEAR || histot <= threshold) {
|
| 407 |
|
|
/* linear tone mapping */
|
| 408 |
|
|
if (tmTop->flags & TM_F_HCONTR)
|
| 409 |
|
|
d = htcontrs(Ldavg) / htcontrs(Lwavg);
|
| 410 |
|
|
else
|
| 411 |
|
|
d = Ldavg / Lwavg;
|
| 412 |
|
|
d = log(d/Ldmax);
|
| 413 |
|
|
for (i = tmTop->brmax-tmTop->brmin+1; i--; )
|
| 414 |
|
|
tmTop->lumap[i] = 256. * exp(
|
| 415 |
|
|
( d + (tmTop->brmin+i)/(double)TM_BRTSCALE )
|
| 416 |
|
|
/ gamval );
|
| 417 |
|
|
} else {
|
| 418 |
|
|
/* histogram adjustment */
|
| 419 |
|
|
for (i = tmTop->brmax-tmTop->brmin+1; i--; ) {
|
| 420 |
|
|
j = d = (double)i/(tmTop->brmax-tmTop->brmin)*histlen;
|
| 421 |
|
|
d -= (double)j;
|
| 422 |
|
|
Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1]));
|
| 423 |
|
|
d = (Ld - Ldmin)/(Ldmax - Ldmin);
|
| 424 |
|
|
tmTop->lumap[i] = 256.*pow(d, 1./gamval);
|
| 425 |
|
|
}
|
| 426 |
|
|
}
|
| 427 |
greg |
3.2 |
if (!(tmTop->flags & TM_F_LINEAR)) {
|
| 428 |
greg |
3.4 |
free((MEM_PTR)histo);
|
| 429 |
|
|
free((MEM_PTR)cumf);
|
| 430 |
greg |
3.2 |
}
|
| 431 |
greg |
3.1 |
returnOK;
|
| 432 |
|
|
}
|
| 433 |
|
|
|
| 434 |
|
|
|
| 435 |
|
|
int
|
| 436 |
|
|
tmMapPixels(ps, ls, cs, len)
|
| 437 |
|
|
register BYTE *ps;
|
| 438 |
|
|
TMbright *ls;
|
| 439 |
|
|
register BYTE *cs;
|
| 440 |
|
|
int len;
|
| 441 |
|
|
{
|
| 442 |
|
|
static char funcName[] = "tmMapPixels";
|
| 443 |
greg |
3.4 |
register int4 li, pv;
|
| 444 |
greg |
3.1 |
|
| 445 |
|
|
if (tmTop == NULL || tmTop->lumap == NULL)
|
| 446 |
|
|
returnErr(TM_E_TMINVAL);
|
| 447 |
|
|
if (ps == NULL | ls == NULL | len <= 0)
|
| 448 |
|
|
returnErr(TM_E_ILLEGAL);
|
| 449 |
|
|
while (len--) {
|
| 450 |
|
|
if ((li = *ls++) < tmTop->brmin)
|
| 451 |
|
|
li = tmTop->brmin;
|
| 452 |
|
|
else if (li > tmTop->brmax)
|
| 453 |
|
|
li = tmTop->brmax;
|
| 454 |
|
|
li = tmTop->lumap[li - tmTop->brmin];
|
| 455 |
|
|
if (cs == TM_NOCHROM)
|
| 456 |
|
|
*ps++ = li>255 ? 255 : li;
|
| 457 |
|
|
else {
|
| 458 |
greg |
3.4 |
pv = *cs++ * li / tmTop->cdiv[RED];
|
| 459 |
greg |
3.1 |
*ps++ = pv>255 ? 255 : pv;
|
| 460 |
greg |
3.4 |
pv = *cs++ * li / tmTop->cdiv[GRN];
|
| 461 |
greg |
3.1 |
*ps++ = pv>255 ? 255 : pv;
|
| 462 |
greg |
3.4 |
pv = *cs++ * li / tmTop->cdiv[BLU];
|
| 463 |
greg |
3.1 |
*ps++ = pv>255 ? 255 : pv;
|
| 464 |
|
|
}
|
| 465 |
|
|
}
|
| 466 |
|
|
returnOK;
|
| 467 |
|
|
}
|
| 468 |
|
|
|
| 469 |
|
|
|
| 470 |
|
|
struct tmStruct *
|
| 471 |
|
|
tmPop() /* pop top tone mapping off stack */
|
| 472 |
|
|
{
|
| 473 |
|
|
register struct tmStruct *tms;
|
| 474 |
|
|
|
| 475 |
|
|
if ((tms = tmTop) != NULL)
|
| 476 |
|
|
tmTop = tms->tmprev;
|
| 477 |
|
|
return(tms);
|
| 478 |
|
|
}
|
| 479 |
|
|
|
| 480 |
|
|
|
| 481 |
|
|
int
|
| 482 |
|
|
tmPull(tms) /* pull a tone mapping from stack */
|
| 483 |
|
|
register struct tmStruct *tms;
|
| 484 |
|
|
{
|
| 485 |
|
|
register struct tmStruct *tms2;
|
| 486 |
|
|
/* special cases first */
|
| 487 |
|
|
if (tms == NULL | tmTop == NULL)
|
| 488 |
|
|
return(0);
|
| 489 |
|
|
if (tms == tmTop) {
|
| 490 |
|
|
tmTop = tms->tmprev;
|
| 491 |
|
|
tms->tmprev = NULL;
|
| 492 |
|
|
return(1);
|
| 493 |
|
|
}
|
| 494 |
|
|
for (tms2 = tmTop; tms2->tmprev != NULL; tms2 = tms2->tmprev)
|
| 495 |
|
|
if (tms == tms2->tmprev) { /* remove it */
|
| 496 |
|
|
tms2->tmprev = tms->tmprev;
|
| 497 |
|
|
tms->tmprev = NULL;
|
| 498 |
|
|
return(1);
|
| 499 |
|
|
}
|
| 500 |
|
|
return(0); /* not found on stack */
|
| 501 |
|
|
}
|
| 502 |
|
|
|
| 503 |
|
|
|
| 504 |
greg |
3.3 |
struct tmStruct *
|
| 505 |
|
|
tmDup() /* duplicate top tone mapping */
|
| 506 |
|
|
{
|
| 507 |
|
|
int len;
|
| 508 |
|
|
register int i;
|
| 509 |
|
|
register struct tmStruct *tmnew;
|
| 510 |
|
|
|
| 511 |
|
|
if (tmTop == NULL) /* anything to duplicate? */
|
| 512 |
|
|
return(NULL);
|
| 513 |
|
|
tmnew = (struct tmStruct *)malloc(sizeof(struct tmStruct));
|
| 514 |
|
|
if (tmnew == NULL)
|
| 515 |
|
|
return(NULL);
|
| 516 |
|
|
*tmnew = *tmTop; /* copy everything */
|
| 517 |
|
|
if (tmnew->histo != NULL) { /* duplicate histogram */
|
| 518 |
|
|
len = (tmnew->brmax-MINBRT)/HISTEP + 1 -
|
| 519 |
|
|
(tmnew->brmin-MINBRT)/HISTEP;
|
| 520 |
|
|
tmnew->histo = (int *)malloc(len*sizeof(int));
|
| 521 |
|
|
if (tmnew->histo != NULL)
|
| 522 |
|
|
for (i = len; i--; )
|
| 523 |
|
|
tmnew->histo[i] = tmTop->histo[i];
|
| 524 |
|
|
}
|
| 525 |
|
|
if (tmnew->lumap != NULL) { /* duplicate luminance mapping */
|
| 526 |
|
|
len = tmnew->brmax-tmnew->brmin+1;
|
| 527 |
|
|
tmnew->lumap = (unsigned short *)malloc(
|
| 528 |
|
|
len*sizeof(unsigned short) );
|
| 529 |
|
|
if (tmnew->lumap != NULL)
|
| 530 |
|
|
for (i = len; i--; )
|
| 531 |
|
|
tmnew->lumap[i] = tmTop->lumap[i];
|
| 532 |
|
|
}
|
| 533 |
greg |
3.4 |
/* clear package data */
|
| 534 |
|
|
for (i = tmNumPkgs; i--; )
|
| 535 |
|
|
tmnew->pd[i] = NULL;
|
| 536 |
greg |
3.3 |
tmnew->tmprev = tmTop; /* make copy current */
|
| 537 |
|
|
return(tmTop = tmnew);
|
| 538 |
|
|
}
|
| 539 |
|
|
|
| 540 |
|
|
|
| 541 |
greg |
3.1 |
int
|
| 542 |
|
|
tmPush(tms) /* push tone mapping on top of stack */
|
| 543 |
|
|
register struct tmStruct *tms;
|
| 544 |
|
|
{
|
| 545 |
|
|
static char funcName[] = "tmPush";
|
| 546 |
|
|
/* check validity */
|
| 547 |
greg |
3.4 |
if (tms == NULL)
|
| 548 |
greg |
3.1 |
returnErr(TM_E_ILLEGAL);
|
| 549 |
|
|
if (tms == tmTop) /* check necessity */
|
| 550 |
|
|
returnOK;
|
| 551 |
|
|
/* pull if already in stack */
|
| 552 |
|
|
(void)tmPull(tms);
|
| 553 |
|
|
/* push it on top */
|
| 554 |
|
|
tms->tmprev = tmTop;
|
| 555 |
|
|
tmTop = tms;
|
| 556 |
|
|
returnOK;
|
| 557 |
|
|
}
|
| 558 |
|
|
|
| 559 |
|
|
|
| 560 |
|
|
void
|
| 561 |
|
|
tmDone(tms) /* done with tone mapping -- destroy it */
|
| 562 |
|
|
register struct tmStruct *tms;
|
| 563 |
|
|
{
|
| 564 |
greg |
3.4 |
register int i;
|
| 565 |
greg |
3.1 |
/* NULL arg. is equiv. to tmTop */
|
| 566 |
|
|
if (tms == NULL && (tms = tmTop) == NULL)
|
| 567 |
|
|
return;
|
| 568 |
|
|
/* take out of stack if present */
|
| 569 |
|
|
(void)tmPull(tms);
|
| 570 |
|
|
/* free tables */
|
| 571 |
|
|
if (tms->histo != NULL)
|
| 572 |
greg |
3.4 |
free((MEM_PTR)tms->histo);
|
| 573 |
greg |
3.1 |
if (tms->lumap != NULL)
|
| 574 |
greg |
3.4 |
free((MEM_PTR)tms->lumap);
|
| 575 |
|
|
/* free private data */
|
| 576 |
|
|
for (i = tmNumPkgs; i--; )
|
| 577 |
|
|
if (tms->pd[i] != NULL)
|
| 578 |
|
|
(*tmPkg[i]->Free)(tms->pd[i]);
|
| 579 |
|
|
free((MEM_PTR)tms); /* free basic structure */
|
| 580 |
greg |
3.1 |
}
|
