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/* 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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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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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* Added von Kries white-balance calculations 10/01 (GW). |
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* |
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* Externals declared in tonemap.h |
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*/ |
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|
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#include "copyright.h" |
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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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|
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struct tmStruct *tmTop = NULL; /* current tone mapping stack */ |
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|
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/* 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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|
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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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if (tmTop != NULL && tmTop->flags & TM_F_NOSTDERR) |
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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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> |
int tmLastError; /* last error incurred by library */ |
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char *tmLastFunction; /* error-generating function name */ |
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|
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struct tmStruct * |
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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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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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comprgb2xyzWBmat(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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tmnew->clfb[RED] = 256.*tmnew->clf[RED] + .5; |
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tmnew->clfb[GRN] = 256.*tmnew->clf[GRN] + .5; |
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tmnew->clfb[BLU] = 256.*tmnew->clf[BLU] + .5; |
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tmnew->clfb[EXP] = COLXS; |
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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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for (i = TM_GAMTSZ; i--; ) |
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tmnew->gamb[i] = 256.*pow((i+.5)/TM_GAMTSZ, 1./tmnew->mongam); |
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/* 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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|
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/* 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->inpsfb = TM_BRTSCALE*log(tmnew->inpsf) + .5; |
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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->flags &= ~TM_F_NEEDMAT; |
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tmnew->brmin = tmnew->brmax = 0; |
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tmnew->hbrmin = 10; tmnew->hbrmax = -10; |
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tmnew->histo = NULL; |
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tmnew->mbrmin = 10; tmnew->mbrmax = -10; |
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tmnew->lumap = NULL; |
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tmnew->tmprev = NULL; |
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|
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tmnew->flags |= TM_F_INITED; |
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/* make it current */ |
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/* 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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tmnew->tmprev = tmTop; |
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return(tmTop = tmnew); |
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} |
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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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tmTop->inpsfb = TM_BRTSCALE*log(sf) + (sf>=1. ? .5 : -.5); |
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|
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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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tmTop->clfb[CIEX] = tmTop->clfb[CIEZ] = 0; |
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tmTop->clfb[CIEY] = 255; |
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} else { |
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comprgb2xyzmat(tmTop->cmat, tmTop->monpri); |
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comprgb2xyzWBmat(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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tmTop->cmat[1][2] = tmTop->cmat[2][0] = tmTop->cmat[2][1] = 0.; |
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|
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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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> |
compxyz2rgbWBmat(tmTop->cmat, tmTop->monpri); |
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|
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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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comprgb2rgbWBmat(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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if (tmTop->inppri != tmTop->monpri) |
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tmTop->flags |= TM_F_NEEDMAT; |
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else |
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< |
tmTop->flags &= ~TM_F_NEEDMAT; |
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> |
/* 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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returnOK; |
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} |
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|
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{ |
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if (tmTop == NULL || tmTop->histo == NULL) |
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return; |
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< |
free((char *)tmTop->histo); |
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> |
free((MEM_PTR)tmTop->histo); |
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tmTop->histo = NULL; |
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} |
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|
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int len; |
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{ |
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static char funcName[] = "tmCvColors"; |
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static COLOR csmall = {.5*MINLUM, .5*MINLUM, .5*MINLUM}; |
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COLOR cmon; |
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double lum, slum; |
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register double d; |
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|
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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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> |
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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if (tmTop->flags & TM_F_NEEDMAT) /* get monitor RGB */ |
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> |
if (tmNeedMatrix(tmTop)) /* get monitor RGB */ |
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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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tmTop->clf[GRN]*cmon[GRN] + |
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tmTop->clf[BLU]*cmon[BLU] ; |
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/* check range */ |
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if (clipgamut(cmon, lum, CGAMUT_LOWER, cblack, cwhite)) |
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> |
if (clipgamut(cmon, lum, CGAMUT_LOWER, csmall, cwhite)) |
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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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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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/* cs[3*i ] = d>.999 ? 255 : 256.*pow(d, 1./tmTop->mongam); */ |
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< |
cs[3*i ] = d>.999 ? 255 : tmTop->gamb[(int)(d*TM_GAMTSZ)]; |
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> |
cs[3*i ] = d>=.999 ? 255 : |
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(int)(256.*pow(d, 1./tmTop->mongam)); |
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d = tmTop->clf[GRN]*cmon[GRN]/lum; |
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< |
/* cs[3*i+1] = d>.999 ? 255 : 256.*pow(d, 1./tmTop->mongam); */ |
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< |
cs[3*i+1] = d>.999 ? 255 : tmTop->gamb[(int)(d*TM_GAMTSZ)]; |
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> |
cs[3*i+1] = d>=.999 ? 255 : |
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(int)(256.*pow(d, 1./tmTop->mongam)); |
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d = tmTop->clf[BLU]*cmon[BLU]/lum; |
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< |
/* cs[3*i+2] = d>.999 ? 255 : 256.*pow(d, 1./tmTop->mongam); */ |
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< |
cs[3*i+2] = d>.999 ? 255 : tmTop->gamb[(int)(d*TM_GAMTSZ)]; |
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> |
cs[3*i+2] = d>=.999 ? 255 : |
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> |
(int)(256.*pow(d, 1./tmTop->mongam)); |
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} |
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returnOK; |
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} |
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|
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|
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int |
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tmCvGrays(ls, scan, len) /* convert float gray values */ |
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TMbright *ls; |
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float *scan; |
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int len; |
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{ |
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+ |
static char funcName[] = "tmCvGrays"; |
| 241 |
+ |
register double d; |
| 242 |
+ |
register int i; |
| 243 |
+ |
|
| 244 |
+ |
if (tmTop == NULL) |
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+ |
returnErr(TM_E_TMINVAL); |
| 246 |
+ |
if (ls == NULL | scan == NULL | len < 0) |
| 247 |
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returnErr(TM_E_ILLEGAL); |
| 248 |
+ |
for (i = len; i--; ) |
| 249 |
+ |
if (scan[i] <= TM_NOLUM) { |
| 250 |
+ |
ls[i] = TM_NOBRT; /* bogus value */ |
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} else { |
| 252 |
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d = TM_BRTSCALE*log(scan[i]); /* encode it */ |
| 253 |
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ls[i] = d>0. ? (int)(d+.5) : (int)(d-.5); |
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} |
| 255 |
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returnOK; |
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} |
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+ |
|
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+ |
|
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int |
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tmAddHisto(ls, len, wt) /* add values to histogram */ |
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register TMbright *ls; |
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int len; |
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int wt; |
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{ |
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static char funcName[] = "tmAddHisto"; |
| 266 |
< |
int sum, oldorig, oldlen, horig, hlen; |
| 266 |
> |
int oldorig=0, oldlen, horig, hlen; |
| 267 |
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register int i, j; |
| 268 |
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|
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– |
if (len <= 0) |
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– |
returnErr(TM_E_ILLEGAL); |
| 269 |
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if (tmTop == NULL) |
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returnErr(TM_E_TMINVAL); |
| 271 |
+ |
if (len < 0) |
| 272 |
+ |
returnErr(TM_E_ILLEGAL); |
| 273 |
+ |
if (len == 0) |
| 274 |
+ |
returnOK; |
| 275 |
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/* first, grow limits */ |
| 276 |
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if (tmTop->histo == NULL) { |
| 277 |
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for (i = len; i-- && ls[i] < MINBRT; ) |
| 278 |
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; |
| 279 |
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if (i < 0) |
| 280 |
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returnOK; |
| 281 |
< |
tmTop->brmin = tmTop->brmax = ls[i]; |
| 281 |
> |
tmTop->hbrmin = tmTop->hbrmax = ls[i]; |
| 282 |
|
oldlen = 0; |
| 283 |
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} else { |
| 284 |
< |
oldorig = (tmTop->brmin-MINBRT)/HISTEP; |
| 285 |
< |
oldlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - oldorig; |
| 284 |
> |
oldorig = (tmTop->hbrmin-MINBRT)/HISTEP; |
| 285 |
> |
oldlen = (tmTop->hbrmax-MINBRT)/HISTEP + 1 - oldorig; |
| 286 |
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} |
| 287 |
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for (i = len; i--; ) { |
| 288 |
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if ((j = ls[i]) < MINBRT) |
| 289 |
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continue; |
| 290 |
< |
if (j < tmTop->brmin) |
| 291 |
< |
tmTop->brmin = j; |
| 292 |
< |
else if (j > tmTop->brmax) |
| 293 |
< |
tmTop->brmax = j; |
| 290 |
> |
if (j < tmTop->hbrmin) |
| 291 |
> |
tmTop->hbrmin = j; |
| 292 |
> |
else if (j > tmTop->hbrmax) |
| 293 |
> |
tmTop->hbrmax = j; |
| 294 |
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} |
| 295 |
< |
horig = (tmTop->brmin-MINBRT)/HISTEP; |
| 296 |
< |
hlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - horig; |
| 295 |
> |
horig = (tmTop->hbrmin-MINBRT)/HISTEP; |
| 296 |
> |
hlen = (tmTop->hbrmax-MINBRT)/HISTEP + 1 - horig; |
| 297 |
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if (hlen > oldlen) { /* (re)allocate histogram */ |
| 298 |
|
register int *newhist = (int *)calloc(hlen, sizeof(int)); |
| 299 |
|
if (newhist == NULL) |
| 301 |
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if (oldlen) { /* copy and free old */ |
| 302 |
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for (i = oldlen, j = i+oldorig-horig; i; ) |
| 303 |
|
newhist[--j] = tmTop->histo[--i]; |
| 304 |
< |
free((char *)tmTop->histo); |
| 304 |
> |
free((MEM_PTR)tmTop->histo); |
| 305 |
|
} |
| 306 |
|
tmTop->histo = newhist; |
| 285 |
– |
if (tmTop->lumap != NULL) { /* invalid tone map */ |
| 286 |
– |
free((char *)tmTop->lumap); |
| 287 |
– |
tmTop->lumap = NULL; |
| 288 |
– |
} |
| 307 |
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} |
| 308 |
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if (wt == 0) |
| 309 |
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returnOK; |
| 336 |
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} |
| 337 |
|
|
| 338 |
|
|
| 339 |
+ |
static int |
| 340 |
+ |
tmNewMap() |
| 341 |
+ |
{ |
| 342 |
+ |
if (tmTop->lumap != NULL && (tmTop->mbrmax - tmTop->mbrmin) != |
| 343 |
+ |
(tmTop->hbrmax - tmTop->hbrmin)) { |
| 344 |
+ |
free((MEM_PTR)tmTop->lumap); |
| 345 |
+ |
tmTop->lumap = NULL; |
| 346 |
+ |
} |
| 347 |
+ |
tmTop->mbrmin = tmTop->hbrmin; |
| 348 |
+ |
tmTop->mbrmax = tmTop->hbrmax; |
| 349 |
+ |
if (tmTop->mbrmin > tmTop->mbrmax) |
| 350 |
+ |
return 0; |
| 351 |
+ |
if (tmTop->lumap == NULL) |
| 352 |
+ |
tmTop->lumap = (unsigned short *)malloc(sizeof(unsigned short)* |
| 353 |
+ |
(tmTop->mbrmax-tmTop->mbrmin+1)); |
| 354 |
+ |
return(tmTop->lumap != NULL); |
| 355 |
+ |
} |
| 356 |
+ |
|
| 357 |
+ |
|
| 358 |
|
int |
| 359 |
+ |
tmFixedMapping(expmult, gamval) |
| 360 |
+ |
double expmult; |
| 361 |
+ |
double gamval; |
| 362 |
+ |
{ |
| 363 |
+ |
static char funcName[] = "tmFixedMapping"; |
| 364 |
+ |
double d; |
| 365 |
+ |
register int i; |
| 366 |
+ |
|
| 367 |
+ |
if (!tmNewMap()) |
| 368 |
+ |
returnErr(TM_E_NOMEM); |
| 369 |
+ |
if (expmult <= .0) |
| 370 |
+ |
expmult = 1.; |
| 371 |
+ |
if (gamval < MINGAM) |
| 372 |
+ |
gamval = tmTop->mongam; |
| 373 |
+ |
d = log(expmult/tmTop->inpsf); |
| 374 |
+ |
for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) |
| 375 |
+ |
tmTop->lumap[i] = 256. * exp( |
| 376 |
+ |
( d + (tmTop->mbrmin+i)*(1./TM_BRTSCALE) ) |
| 377 |
+ |
/ gamval ); |
| 378 |
+ |
returnOK; |
| 379 |
+ |
} |
| 380 |
+ |
|
| 381 |
+ |
|
| 382 |
+ |
int |
| 383 |
|
tmComputeMapping(gamval, Lddyn, Ldmax) |
| 384 |
|
double gamval; |
| 385 |
|
double Lddyn; |
| 388 |
|
static char funcName[] = "tmComputeMapping"; |
| 389 |
|
int *histo; |
| 390 |
|
float *cumf; |
| 391 |
< |
int brt0, histlen, histot, threshold, ceiling, trimmings; |
| 391 |
> |
int brt0, histlen, threshold, ceiling, trimmings; |
| 392 |
|
double logLddyn, Ldmin, Ldavg, Lwavg, Tr, Lw, Ld; |
| 393 |
< |
int4 sum; |
| 393 |
> |
int32 histot; |
| 394 |
> |
double sum; |
| 395 |
|
register double d; |
| 396 |
|
register int i, j; |
| 397 |
|
|
| 405 |
|
Ldmin = Ldmax/Lddyn; |
| 406 |
|
logLddyn = log(Lddyn); |
| 407 |
|
Ldavg = sqrt(Ldmax*Ldmin); |
| 408 |
< |
i = (tmTop->brmin-MINBRT)/HISTEP; |
| 408 |
> |
i = (tmTop->hbrmin-MINBRT)/HISTEP; |
| 409 |
|
brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
| 410 |
< |
histlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - i; |
| 410 |
> |
histlen = (tmTop->hbrmax-MINBRT)/HISTEP + 1 - i; |
| 411 |
|
/* histogram total and mean */ |
| 412 |
|
histot = 0; sum = 0; |
| 413 |
|
j = brt0 + histlen*HISTEP; |
| 419 |
|
if (threshold < 4) |
| 420 |
|
returnErr(TM_E_TMFAIL); |
| 421 |
|
Lwavg = tmLuminance( (double)sum / histot ); |
| 422 |
< |
if (!(tmTop->flags & TM_F_LINEAR)) { /* clamp histogram */ |
| 423 |
< |
histo = (int *)malloc(histlen*sizeof(int)); |
| 424 |
< |
cumf = (float *)malloc((histlen+1)*sizeof(float)); |
| 425 |
< |
if (histo == NULL | cumf == NULL) |
| 426 |
< |
returnErr(TM_E_NOMEM); |
| 427 |
< |
for (i = histlen; i--; ) /* make malleable copy */ |
| 428 |
< |
histo[i] = tmTop->histo[i]; |
| 429 |
< |
do { /* iterate to solution */ |
| 430 |
< |
sum = 0; /* cumulative probability */ |
| 431 |
< |
for (i = 0; i < histlen; i++) { |
| 432 |
< |
cumf[i] = (double)sum/histot; |
| 433 |
< |
sum += histo[i]; |
| 422 |
> |
/* allocate space for mapping */ |
| 423 |
> |
if (!tmNewMap()) |
| 424 |
> |
returnErr(TM_E_NOMEM); |
| 425 |
> |
/* use linear tone mapping? */ |
| 426 |
> |
if (tmTop->flags & TM_F_LINEAR) |
| 427 |
> |
goto linearmap; |
| 428 |
> |
/* clamp histogram */ |
| 429 |
> |
histo = (int *)malloc(histlen*sizeof(int)); |
| 430 |
> |
cumf = (float *)malloc((histlen+2)*sizeof(float)); |
| 431 |
> |
if (histo == NULL | cumf == NULL) |
| 432 |
> |
returnErr(TM_E_NOMEM); |
| 433 |
> |
cumf[histlen+1] = 1.; /* guard for assignment code */ |
| 434 |
> |
for (i = histlen; i--; ) /* make malleable copy */ |
| 435 |
> |
histo[i] = tmTop->histo[i]; |
| 436 |
> |
do { /* iterate to solution */ |
| 437 |
> |
sum = 0; /* cumulative probability */ |
| 438 |
> |
for (i = 0; i < histlen; i++) { |
| 439 |
> |
cumf[i] = (double)sum/histot; |
| 440 |
> |
sum += histo[i]; |
| 441 |
> |
} |
| 442 |
> |
cumf[histlen] = 1.; |
| 443 |
> |
Tr = histot * (double)(tmTop->hbrmax - tmTop->hbrmin) / |
| 444 |
> |
((double)histlen*TM_BRTSCALE) / logLddyn; |
| 445 |
> |
ceiling = Tr + 1.; |
| 446 |
> |
trimmings = 0; /* clip to envelope */ |
| 447 |
> |
for (i = histlen; i--; ) { |
| 448 |
> |
if (tmTop->flags & TM_F_HCONTR) { |
| 449 |
> |
Lw = tmLuminance(brt0 + i*HISTEP); |
| 450 |
> |
Ld = Ldmin * exp( logLddyn * |
| 451 |
> |
.5*(cumf[i]+cumf[i+1]) ); |
| 452 |
> |
ceiling = Tr * (htcontrs(Ld) * Lw) / |
| 453 |
> |
(htcontrs(Lw) * Ld) + 1.; |
| 454 |
|
} |
| 455 |
< |
cumf[i] = 1.; |
| 456 |
< |
Tr = histot * (double)(tmTop->brmax - tmTop->brmin) / |
| 457 |
< |
((double)histlen*TM_BRTSCALE) / logLddyn; |
| 376 |
< |
ceiling = Tr + 1.; |
| 377 |
< |
trimmings = 0; /* clip to envelope */ |
| 378 |
< |
for (i = histlen; i--; ) { |
| 379 |
< |
if (tmTop->flags & TM_F_HCONTR) { |
| 380 |
< |
Lw = tmLuminance(brt0 + i*HISTEP); |
| 381 |
< |
Ld = Ldmin * exp( logLddyn * |
| 382 |
< |
.5*(cumf[i]+cumf[i+1]) ); |
| 383 |
< |
ceiling = Tr * (htcontrs(Ld) * Lw) / |
| 384 |
< |
(htcontrs(Lw) * Ld) + 1.; |
| 385 |
< |
} |
| 386 |
< |
if (histo[i] > ceiling) { |
| 387 |
< |
trimmings += histo[i] - ceiling; |
| 388 |
< |
histo[i] = ceiling; |
| 389 |
< |
} |
| 455 |
> |
if (histo[i] > ceiling) { |
| 456 |
> |
trimmings += histo[i] - ceiling; |
| 457 |
> |
histo[i] = ceiling; |
| 458 |
|
} |
| 391 |
– |
} while ((histot -= trimmings) > threshold && |
| 392 |
– |
trimmings > threshold); |
| 393 |
– |
} |
| 394 |
– |
/* allocate luminance map */ |
| 395 |
– |
if (tmTop->lumap == NULL) { |
| 396 |
– |
tmTop->lumap = (unsigned short *)malloc( |
| 397 |
– |
(tmTop->brmax-tmTop->brmin+1)*sizeof(unsigned short) ); |
| 398 |
– |
if (tmTop->lumap == NULL) |
| 399 |
– |
returnErr(TM_E_NOMEM); |
| 400 |
– |
} |
| 401 |
– |
if (tmTop->flags & TM_F_LINEAR || histot <= threshold) { |
| 402 |
– |
/* linear tone mapping */ |
| 403 |
– |
if (tmTop->flags & TM_F_HCONTR) |
| 404 |
– |
d = htcontrs(Ldavg) / htcontrs(Lwavg); |
| 405 |
– |
else |
| 406 |
– |
d = Ldavg / Lwavg; |
| 407 |
– |
d = log(d/Ldmax); |
| 408 |
– |
for (i = tmTop->brmax-tmTop->brmin+1; i--; ) |
| 409 |
– |
tmTop->lumap[i] = 256. * exp( |
| 410 |
– |
( d + (tmTop->brmin+i)/(double)TM_BRTSCALE ) |
| 411 |
– |
/ gamval ); |
| 412 |
– |
} else { |
| 413 |
– |
/* histogram adjustment */ |
| 414 |
– |
for (i = tmTop->brmax-tmTop->brmin+1; i--; ) { |
| 415 |
– |
j = d = (double)i/(tmTop->brmax-tmTop->brmin)*histlen; |
| 416 |
– |
d -= (double)j; |
| 417 |
– |
Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1])); |
| 418 |
– |
d = (Ld - Ldmin)/(Ldmax - Ldmin); |
| 419 |
– |
tmTop->lumap[i] = 256.*pow(d, 1./gamval); |
| 459 |
|
} |
| 460 |
+ |
/* check if we're out of data */ |
| 461 |
+ |
if ((histot -= trimmings) <= threshold) { |
| 462 |
+ |
free((MEM_PTR)histo); |
| 463 |
+ |
free((MEM_PTR)cumf); |
| 464 |
+ |
goto linearmap; |
| 465 |
+ |
} |
| 466 |
+ |
} while (trimmings > threshold); |
| 467 |
+ |
/* assign tone-mapping */ |
| 468 |
+ |
for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) { |
| 469 |
+ |
j = d = (double)i/(tmTop->mbrmax-tmTop->mbrmin)*histlen; |
| 470 |
+ |
d -= (double)j; |
| 471 |
+ |
Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1])); |
| 472 |
+ |
d = (Ld - Ldmin)/(Ldmax - Ldmin); |
| 473 |
+ |
tmTop->lumap[i] = 256.*pow(d, 1./gamval); |
| 474 |
|
} |
| 475 |
< |
if (!(tmTop->flags & TM_F_LINEAR)) { |
| 476 |
< |
free((char *)histo); |
| 424 |
< |
free((char *)cumf); |
| 425 |
< |
} |
| 475 |
> |
free((MEM_PTR)histo); /* clean up and return */ |
| 476 |
> |
free((MEM_PTR)cumf); |
| 477 |
|
returnOK; |
| 478 |
+ |
linearmap: /* linear tone-mapping */ |
| 479 |
+ |
if (tmTop->flags & TM_F_HCONTR) |
| 480 |
+ |
d = htcontrs(Ldavg) / htcontrs(Lwavg); |
| 481 |
+ |
else |
| 482 |
+ |
d = Ldavg / Lwavg; |
| 483 |
+ |
return(tmFixedMapping(tmTop->inpsf*d/Ldmax, gamval)); |
| 484 |
|
} |
| 485 |
|
|
| 486 |
|
|
| 492 |
|
int len; |
| 493 |
|
{ |
| 494 |
|
static char funcName[] = "tmMapPixels"; |
| 495 |
< |
int rdiv, gdiv, bdiv; |
| 439 |
< |
register int li, pv; |
| 495 |
> |
register int32 li, pv; |
| 496 |
|
|
| 497 |
|
if (tmTop == NULL || tmTop->lumap == NULL) |
| 498 |
|
returnErr(TM_E_TMINVAL); |
| 499 |
< |
if (ps == NULL | ls == NULL | len <= 0) |
| 499 |
> |
if (ps == NULL | ls == NULL | len < 0) |
| 500 |
|
returnErr(TM_E_ILLEGAL); |
| 445 |
– |
rdiv = tmTop->gamb[((int4)TM_GAMTSZ*tmTop->clfb[RED])>>8]; |
| 446 |
– |
gdiv = tmTop->gamb[((int4)TM_GAMTSZ*tmTop->clfb[GRN])>>8]; |
| 447 |
– |
bdiv = tmTop->gamb[((int4)TM_GAMTSZ*tmTop->clfb[BLU])>>8]; |
| 501 |
|
while (len--) { |
| 502 |
< |
if ((li = *ls++) < tmTop->brmin) |
| 503 |
< |
li = tmTop->brmin; |
| 504 |
< |
else if (li > tmTop->brmax) |
| 505 |
< |
li = tmTop->brmax; |
| 506 |
< |
li = tmTop->lumap[li - tmTop->brmin]; |
| 502 |
> |
if ((li = *ls++) < tmTop->mbrmin) { |
| 503 |
> |
li = 0; |
| 504 |
> |
} else { |
| 505 |
> |
if (li > tmTop->mbrmax) |
| 506 |
> |
li = tmTop->mbrmax; |
| 507 |
> |
li = tmTop->lumap[li - tmTop->mbrmin]; |
| 508 |
> |
} |
| 509 |
|
if (cs == TM_NOCHROM) |
| 510 |
|
*ps++ = li>255 ? 255 : li; |
| 511 |
|
else { |
| 512 |
< |
pv = *cs++ * li / rdiv; |
| 512 |
> |
pv = *cs++ * li / tmTop->cdiv[RED]; |
| 513 |
|
*ps++ = pv>255 ? 255 : pv; |
| 514 |
< |
pv = *cs++ * li / gdiv; |
| 514 |
> |
pv = *cs++ * li / tmTop->cdiv[GRN]; |
| 515 |
|
*ps++ = pv>255 ? 255 : pv; |
| 516 |
< |
pv = *cs++ * li / bdiv; |
| 516 |
> |
pv = *cs++ * li / tmTop->cdiv[BLU]; |
| 517 |
|
*ps++ = pv>255 ? 255 : pv; |
| 518 |
|
} |
| 519 |
|
} |
| 555 |
|
} |
| 556 |
|
|
| 557 |
|
|
| 558 |
+ |
struct tmStruct * |
| 559 |
+ |
tmDup() /* duplicate top tone mapping */ |
| 560 |
+ |
{ |
| 561 |
+ |
int len; |
| 562 |
+ |
register int i; |
| 563 |
+ |
register struct tmStruct *tmnew; |
| 564 |
+ |
|
| 565 |
+ |
if (tmTop == NULL) /* anything to duplicate? */ |
| 566 |
+ |
return(NULL); |
| 567 |
+ |
tmnew = (struct tmStruct *)malloc(sizeof(struct tmStruct)); |
| 568 |
+ |
if (tmnew == NULL) |
| 569 |
+ |
return(NULL); |
| 570 |
+ |
*tmnew = *tmTop; /* copy everything */ |
| 571 |
+ |
if (tmnew->histo != NULL) { /* duplicate histogram */ |
| 572 |
+ |
len = (tmnew->hbrmax-MINBRT)/HISTEP + 1 - |
| 573 |
+ |
(tmnew->hbrmin-MINBRT)/HISTEP; |
| 574 |
+ |
tmnew->histo = (int *)malloc(len*sizeof(int)); |
| 575 |
+ |
if (tmnew->histo != NULL) |
| 576 |
+ |
for (i = len; i--; ) |
| 577 |
+ |
tmnew->histo[i] = tmTop->histo[i]; |
| 578 |
+ |
} |
| 579 |
+ |
if (tmnew->lumap != NULL) { /* duplicate luminance mapping */ |
| 580 |
+ |
len = tmnew->mbrmax-tmnew->mbrmin+1; |
| 581 |
+ |
tmnew->lumap = (unsigned short *)malloc( |
| 582 |
+ |
len*sizeof(unsigned short) ); |
| 583 |
+ |
if (tmnew->lumap != NULL) |
| 584 |
+ |
for (i = len; i--; ) |
| 585 |
+ |
tmnew->lumap[i] = tmTop->lumap[i]; |
| 586 |
+ |
} |
| 587 |
+ |
/* clear package data */ |
| 588 |
+ |
for (i = tmNumPkgs; i--; ) |
| 589 |
+ |
tmnew->pd[i] = NULL; |
| 590 |
+ |
tmnew->tmprev = tmTop; /* make copy current */ |
| 591 |
+ |
return(tmTop = tmnew); |
| 592 |
+ |
} |
| 593 |
+ |
|
| 594 |
+ |
|
| 595 |
|
int |
| 596 |
|
tmPush(tms) /* push tone mapping on top of stack */ |
| 597 |
|
register struct tmStruct *tms; |
| 598 |
|
{ |
| 599 |
|
static char funcName[] = "tmPush"; |
| 600 |
|
/* check validity */ |
| 601 |
< |
if (tms == NULL || !(tms->flags & TM_F_INITED)) |
| 601 |
> |
if (tms == NULL) |
| 602 |
|
returnErr(TM_E_ILLEGAL); |
| 603 |
|
if (tms == tmTop) /* check necessity */ |
| 604 |
|
returnOK; |
| 615 |
|
tmDone(tms) /* done with tone mapping -- destroy it */ |
| 616 |
|
register struct tmStruct *tms; |
| 617 |
|
{ |
| 618 |
+ |
register int i; |
| 619 |
|
/* NULL arg. is equiv. to tmTop */ |
| 620 |
|
if (tms == NULL && (tms = tmTop) == NULL) |
| 621 |
|
return; |
| 623 |
|
(void)tmPull(tms); |
| 624 |
|
/* free tables */ |
| 625 |
|
if (tms->histo != NULL) |
| 626 |
< |
free((char *)tms->histo); |
| 626 |
> |
free((MEM_PTR)tms->histo); |
| 627 |
|
if (tms->lumap != NULL) |
| 628 |
< |
free((char *)tms->lumap); |
| 629 |
< |
tms->flags = 0; |
| 630 |
< |
free((char *)tms); /* free basic structure */ |
| 628 |
> |
free((MEM_PTR)tms->lumap); |
| 629 |
> |
/* free private data */ |
| 630 |
> |
for (i = tmNumPkgs; i--; ) |
| 631 |
> |
if (tms->pd[i] != NULL) |
| 632 |
> |
(*tmPkg[i]->Free)(tms->pd[i]); |
| 633 |
> |
free((MEM_PTR)tms); /* free basic structure */ |
| 634 |
> |
} |
| 635 |
> |
|
| 636 |
> |
/******************** Shared but Private library routines *********************/ |
| 637 |
> |
|
| 638 |
> |
BYTE tmMesofact[BMESUPPER-BMESLOWER]; |
| 639 |
> |
|
| 640 |
> |
void |
| 641 |
> |
tmMkMesofact() /* build mesopic lookup factor table */ |
| 642 |
> |
{ |
| 643 |
> |
register int i; |
| 644 |
> |
|
| 645 |
> |
if (tmMesofact[BMESUPPER-BMESLOWER-1]) |
| 646 |
> |
return; |
| 647 |
> |
|
| 648 |
> |
for (i = BMESLOWER; i < BMESUPPER; i++) |
| 649 |
> |
tmMesofact[i-BMESLOWER] = 256. * |
| 650 |
> |
(tmLuminance(i) - LMESLOWER) / |
| 651 |
> |
(LMESUPPER - LMESLOWER); |
| 652 |
> |
} |
| 653 |
> |
|
| 654 |
> |
|
| 655 |
> |
int |
| 656 |
> |
tmErrorReturn(func, err) /* error return (with message) */ |
| 657 |
> |
char *func; |
| 658 |
> |
int err; |
| 659 |
> |
{ |
| 660 |
> |
tmLastFunction = func; |
| 661 |
> |
tmLastError = err; |
| 662 |
> |
if (tmTop != NULL && tmTop->flags & TM_F_NOSTDERR) |
| 663 |
> |
return(err); |
| 664 |
> |
fputs(func, stderr); |
| 665 |
> |
fputs(": ", stderr); |
| 666 |
> |
fputs(tmErrorMessage[err], stderr); |
| 667 |
> |
fputs("!\n", stderr); |
| 668 |
> |
return(err); |
| 669 |
|
} |
