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/* Copyright (c) 1997 Regents of the University of California */ |
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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static char SCCSid[] = "$SunId$ SGI"; |
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#endif |
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/* |
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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->hbrmin = tmnew->hbrmax = 0; |
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tmnew->histo = NULL; |
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tmnew->mbrmin = tmnew->mbrmax = 0; |
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tmnew->lumap = NULL; |
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/* zero private data */ |
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for (i = TM_MAXPKG; 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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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 (tmNeedMatrix(tmTop)) /* get monitor RGB */ |
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int wt; |
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{ |
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static char funcName[] = "tmAddHisto"; |
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int sum, oldorig, oldlen, horig, hlen; |
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int oldorig, oldlen, horig, hlen; |
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register int i, j; |
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if (len <= 0) |
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returnErr(TM_E_ILLEGAL); |
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if (tmTop == NULL) |
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returnErr(TM_E_TMINVAL); |
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if (len < 0) |
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returnErr(TM_E_ILLEGAL); |
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if (len == 0) |
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returnOK; |
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/* first, grow limits */ |
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if (tmTop->histo == NULL) { |
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for (i = len; i-- && ls[i] < MINBRT; ) |
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; |
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if (i < 0) |
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returnOK; |
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tmTop->brmin = tmTop->brmax = ls[i]; |
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tmTop->hbrmin = tmTop->hbrmax = ls[i]; |
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oldlen = 0; |
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} else { |
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oldorig = (tmTop->brmin-MINBRT)/HISTEP; |
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oldlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - oldorig; |
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oldorig = (tmTop->hbrmin-MINBRT)/HISTEP; |
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oldlen = (tmTop->hbrmax-MINBRT)/HISTEP + 1 - oldorig; |
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} |
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for (i = len; i--; ) { |
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if ((j = ls[i]) < MINBRT) |
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continue; |
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if (j < tmTop->brmin) |
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tmTop->brmin = j; |
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else if (j > tmTop->brmax) |
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tmTop->brmax = j; |
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if (j < tmTop->hbrmin) |
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tmTop->hbrmin = j; |
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else if (j > tmTop->hbrmax) |
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tmTop->hbrmax = j; |
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} |
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horig = (tmTop->brmin-MINBRT)/HISTEP; |
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hlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - horig; |
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horig = (tmTop->hbrmin-MINBRT)/HISTEP; |
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hlen = (tmTop->hbrmax-MINBRT)/HISTEP + 1 - horig; |
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if (hlen > oldlen) { /* (re)allocate histogram */ |
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register int *newhist = (int *)calloc(hlen, sizeof(int)); |
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if (newhist == NULL) |
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free((MEM_PTR)tmTop->histo); |
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} |
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tmTop->histo = newhist; |
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if (tmTop->lumap != NULL) { /* invalid tone map */ |
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free((MEM_PTR)tmTop->lumap); |
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tmTop->lumap = NULL; |
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} |
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} |
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if (wt == 0) |
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returnOK; |
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Ldmin = Ldmax/Lddyn; |
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logLddyn = log(Lddyn); |
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Ldavg = sqrt(Ldmax*Ldmin); |
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i = (tmTop->brmin-MINBRT)/HISTEP; |
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i = (tmTop->hbrmin-MINBRT)/HISTEP; |
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brt0 = MINBRT + HISTEP/2 + i*HISTEP; |
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histlen = (tmTop->brmax-MINBRT)/HISTEP + 1 - i; |
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histlen = (tmTop->hbrmax-MINBRT)/HISTEP + 1 - i; |
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/* histogram total and mean */ |
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histot = 0; sum = 0; |
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j = brt0 + histlen*HISTEP; |
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sum += histo[i]; |
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} |
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cumf[i] = 1.; |
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Tr = histot * (double)(tmTop->brmax - tmTop->brmin) / |
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Tr = histot * (double)(tmTop->hbrmax - tmTop->hbrmin) / |
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((double)histlen*TM_BRTSCALE) / logLddyn; |
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ceiling = Tr + 1.; |
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trimmings = 0; /* clip to envelope */ |
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trimmings > threshold); |
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} |
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/* allocate luminance map */ |
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if (tmTop->lumap == NULL) { |
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tmTop->lumap = (unsigned short *)malloc( |
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(tmTop->brmax-tmTop->brmin+1)*sizeof(unsigned short) ); |
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if (tmTop->lumap == NULL) |
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returnErr(TM_E_NOMEM); |
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} |
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if (tmTop->lumap != NULL) |
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free((MEM_PTR)tmTop->lumap); |
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tmTop->mbrmin = tmTop->hbrmin; |
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tmTop->mbrmax = tmTop->hbrmax; |
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tmTop->lumap = (unsigned short *)malloc( |
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(tmTop->mbrmax-tmTop->mbrmin+1)*sizeof(unsigned short) ); |
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if (tmTop->lumap == NULL) |
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returnErr(TM_E_NOMEM); |
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if (tmTop->flags & TM_F_LINEAR || histot <= threshold) { |
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/* linear tone mapping */ |
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if (tmTop->flags & TM_F_HCONTR) |
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else |
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d = Ldavg / Lwavg; |
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d = log(d/Ldmax); |
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for (i = tmTop->brmax-tmTop->brmin+1; i--; ) |
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for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) |
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tmTop->lumap[i] = 256. * exp( |
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( d + (tmTop->brmin+i)/(double)TM_BRTSCALE ) |
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( d + (tmTop->mbrmin+i)/(double)TM_BRTSCALE ) |
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/ gamval ); |
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} else { |
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/* histogram adjustment */ |
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for (i = tmTop->brmax-tmTop->brmin+1; i--; ) { |
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j = d = (double)i/(tmTop->brmax-tmTop->brmin)*histlen; |
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for (i = tmTop->mbrmax-tmTop->mbrmin+1; i--; ) { |
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j = d = (double)i/(tmTop->mbrmax-tmTop->mbrmin)*histlen; |
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d -= (double)j; |
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Ld = Ldmin*exp(logLddyn*((1.-d)*cumf[j]+d*cumf[j+1])); |
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d = (Ld - Ldmin)/(Ldmax - Ldmin); |
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if (tmTop == NULL || tmTop->lumap == NULL) |
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returnErr(TM_E_TMINVAL); |
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if (ps == NULL | ls == NULL | len <= 0) |
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if (ps == NULL | ls == NULL | len < 0) |
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returnErr(TM_E_ILLEGAL); |
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while (len--) { |
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if ((li = *ls++) < tmTop->brmin) |
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li = tmTop->brmin; |
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else if (li > tmTop->brmax) |
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li = tmTop->brmax; |
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li = tmTop->lumap[li - tmTop->brmin]; |
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if ((li = *ls++) < tmTop->mbrmin) |
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li = tmTop->mbrmin; |
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else if (li > tmTop->mbrmax) |
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li = tmTop->mbrmax; |
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li = tmTop->lumap[li - tmTop->mbrmin]; |
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if (cs == TM_NOCHROM) |
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*ps++ = li>255 ? 255 : li; |
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else { |
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return(NULL); |
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*tmnew = *tmTop; /* copy everything */ |
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if (tmnew->histo != NULL) { /* duplicate histogram */ |
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len = (tmnew->brmax-MINBRT)/HISTEP + 1 - |
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(tmnew->brmin-MINBRT)/HISTEP; |
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len = (tmnew->hbrmax-MINBRT)/HISTEP + 1 - |
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(tmnew->hbrmin-MINBRT)/HISTEP; |
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tmnew->histo = (int *)malloc(len*sizeof(int)); |
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if (tmnew->histo != NULL) |
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for (i = len; i--; ) |
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tmnew->histo[i] = tmTop->histo[i]; |
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} |
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if (tmnew->lumap != NULL) { /* duplicate luminance mapping */ |
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len = tmnew->brmax-tmnew->brmin+1; |
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len = tmnew->mbrmax-tmnew->mbrmin+1; |
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tmnew->lumap = (unsigned short *)malloc( |
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len*sizeof(unsigned short) ); |
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if (tmnew->lumap != NULL) |