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#include "calcomp.h" |
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#define MAXINP 32 /* maximum number of input files */ |
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#define WINSIZ 9 /* scanline window size */ |
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#define MIDSCN 4 /* current scan position */ |
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#define BRT (-1) /* special index for brightness */ |
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|
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struct { |
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char *name; /* file name */ |
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FILE *fp; /* stream pointer */ |
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COLOR *scan; /* input scanline */ |
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COLOR *scan[WINSIZ]; /* input scanline window */ |
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COLOR coef; /* coefficient */ |
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} input[MAXINP]; /* input pictures */ |
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int xpos, ypos; /* picture position */ |
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int wrongformat = 0; |
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|
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tputs(s) /* put out string preceded by a tab */ |
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char *s; |
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{ |
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char fmt[32]; |
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double d; |
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COLOR ctmp; |
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/* echo header line */ |
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putchar('\t'); |
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fputs(s, stdout); |
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if (!original) |
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return; |
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/* check for exposure */ |
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if (isexpos(s)) { |
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|
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if (isformat(s)) { /* check format */ |
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formatval(fmt, s); |
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wrongformat = strcmp(fmt, COLRFMT); |
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} else if (original && isexpos(s)) { /* exposure */ |
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d = 1.0/exposval(s); |
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scalecolor(input[nfiles].coef, d); |
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} else if (iscolcor(s)) { |
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} else if (original && iscolcor(s)) { /* color correction */ |
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colcorval(ctmp, s); |
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colval(input[nfiles].coef,RED) /= colval(ctmp,RED); |
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colval(input[nfiles].coef,GRN) /= colval(ctmp,GRN); |
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colval(input[nfiles].coef,BLU) /= colval(ctmp,BLU); |
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} else { /* echo unaffected line */ |
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putchar('\t'); |
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fputs(s, stdout); |
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} |
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|
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} |
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{ |
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extern double l_redin(), l_grnin(), l_bluin(), l_brtin(), atof(); |
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double f; |
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int a; |
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int a, i; |
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funset(vcolin[RED], 1, l_redin); |
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funset(vcolin[GRN], 1, l_grnin); |
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funset(vcolin[BLU], 1, l_bluin); |
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funset(vbrtin, 1, l_brtin); |
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funset(vcolin[RED], 1, '=', l_redin); |
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funset(vcolin[GRN], 1, '=', l_grnin); |
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funset(vcolin[BLU], 1, '=', l_bluin); |
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funset(vbrtin, 1, '=', l_brtin); |
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|
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for (a = 1; a < argc; a++) |
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if (argv[a][0] == '-') |
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} |
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fputs(input[nfiles].name, stdout); |
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fputs(":\n", stdout); |
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getheader(input[nfiles].fp, tputs); |
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getheader(input[nfiles].fp, tputs, NULL); |
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if (wrongformat) { |
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eputs(input[nfiles].name); |
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eputs(": not in Radiance picture format\n"); |
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quit(1); |
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} |
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if (fgetresolu(&xpos, &ypos, input[nfiles].fp) != |
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(YMAJOR|YDECR)) { |
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eputs(input[nfiles].name); |
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eputs(": resolution mismatch\n"); |
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quit(1); |
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} |
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input[nfiles].scan = (COLOR *)emalloc(xres*sizeof(COLOR)); |
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for (i = 0; i < WINSIZ; i++) |
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input[nfiles].scan[i] = |
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(COLOR *)emalloc(xres*sizeof(COLOR)); |
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nfiles++; |
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} |
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printargs(argc, argv, stdout); |
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fputformat(COLRFMT, stdout); |
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putchar('\n'); |
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fputresolu(YMAJOR|YDECR, xres, yres, stdout); |
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combine(); |
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brtdef = eparse(vbrtout); |
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else |
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brtdef = NULL; |
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/* predefine variables */ |
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varset(vnfiles, (double)nfiles); |
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varset(vxres, (double)xres); |
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varset(vyres, (double)yres); |
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/* define constants */ |
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varset(vnfiles, ':', (double)nfiles); |
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varset(vxres, ':', (double)xres); |
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varset(vyres, ':', (double)yres); |
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/* allocate scanline */ |
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scanout = (COLOR *)emalloc(xres*sizeof(COLOR)); |
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/* initialize input */ |
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initinp(); |
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/* combine files */ |
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for (ypos = yres-1; ypos >= 0; ypos--) { |
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for (i = 0; i < nfiles; i++) |
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if (freadscan(input[i].scan, xres, input[i].fp) < 0) { |
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eputs(input[i].name); |
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eputs(": read error\n"); |
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quit(1); |
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} |
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varset(vypos, (double)ypos); |
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advance(); |
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varset(vypos, '=', (double)ypos); |
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for (xpos = 0; xpos < xres; xpos++) { |
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for (i = 0; i < nfiles; i++) |
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multcolor(input[i].scan[xpos],input[i].coef); |
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varset(vxpos, (double)xpos); |
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varset(vxpos, '=', (double)xpos); |
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eclock++; |
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if (brtdef != NULL) { |
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d = evalue(brtdef); |
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} else { |
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for (j = 0; j < 3; j++) { |
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if (coldef[j] != NULL) { |
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colval(scanout[xpos],j) = evalue(coldef[j]); |
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d = evalue(coldef[j]); |
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} else { |
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colval(scanout[xpos],j) = 0.0; |
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d = 0.0; |
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for (i = 0; i < nfiles; i++) |
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colval(scanout[xpos],j) += |
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colval(input[i].scan[xpos],j); |
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d += colval(input[i].scan[MIDSCN][xpos],j); |
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} |
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if (colval(scanout[xpos],j) < 0.0) |
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colval(scanout[xpos],j) = 0.0; |
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if (d < 0.0) |
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d = 0.0; |
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colval(scanout[xpos],j) = d; |
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} |
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} |
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} |
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} |
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initinp() /* initilize scan windows */ |
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{ |
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for (ypos = yres+(MIDSCN-1); ypos >= yres; ypos--) |
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advance(); |
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} |
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|
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|
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advance() /* read in next scanline */ |
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{ |
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register COLOR *st; |
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register int i, j; |
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|
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for (i = 0; i < nfiles; i++) { |
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st = input[i].scan[WINSIZ-1]; |
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for (j = WINSIZ-1; j > 0; j--) /* rotate window */ |
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input[i].scan[j] = input[i].scan[j-1]; |
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input[i].scan[0] = st; |
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if (ypos < MIDSCN) /* hit bottom */ |
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continue; |
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if (freadscan(st, xres, input[i].fp) < 0) { |
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eputs(input[i].name); |
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eputs(": read error\n"); |
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quit(1); |
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} |
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for (j = 0; j < xres; j++) /* adjust color */ |
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multcolor(st[j], input[i].coef); |
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} |
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} |
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|
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|
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double |
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colin(fn, ci) /* return color value for picture */ |
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register int fn, ci; |
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colin(ci) /* return color value for picture */ |
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register int ci; |
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{ |
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if (fn == 0) |
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return((double)nfiles); |
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if (fn < 1 || fn > nfiles) { |
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int n, fn; |
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register int xoff, yoff; |
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double d; |
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|
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fn = (d = argument(1)) - .5; |
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if (d <= -.5 || fn >= nfiles) { |
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errno = EDOM; |
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return(0.0); |
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} |
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return(colval(input[fn-1].scan[xpos],ci)); |
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if (d < .5) |
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return((double)nfiles); |
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xoff = yoff = 0; |
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n = nargum(); |
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if (n >= 2) { |
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d = argument(2); |
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if (d < 0.0) { |
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xoff = d-.5; |
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if (xpos+xoff < 0) |
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xoff = -xpos; |
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} else { |
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xoff = d+.5; |
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if (xpos+xoff >= xres) |
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xoff = xres-1-xpos; |
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} |
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} |
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if (n >= 3) { |
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d = argument(3); |
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if (d < 0.0) { |
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yoff = d-.5; |
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if (yoff+MIDSCN < 0) |
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yoff = -MIDSCN; |
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if (ypos+yoff < 0) |
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yoff = -ypos; |
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} else { |
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yoff = d+.5; |
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if (yoff+MIDSCN >= WINSIZ) |
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yoff = WINSIZ-1-MIDSCN; |
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if (ypos+yoff >= yres) |
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yoff = yres-1-ypos; |
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} |
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} |
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if (ci == BRT) |
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return(bright(input[fn].scan[MIDSCN+yoff][xpos+xoff])); |
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return(colval(input[fn].scan[MIDSCN+yoff][xpos+xoff],ci)); |
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} |
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double |
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l_redin() /* get red color */ |
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{ |
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return(colin((int)(argument(1)+.5), RED)); |
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return(colin(RED)); |
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} |
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double |
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l_grnin() /* get green color */ |
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{ |
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return(colin((int)(argument(1)+.5), GRN)); |
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return(colin(GRN)); |
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} |
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double |
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l_bluin() /* get blue color */ |
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{ |
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return(colin((int)(argument(1)+.5), BLU)); |
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return(colin(BLU)); |
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} |
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double |
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l_brtin() /* get brightness value */ |
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{ |
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register int fn; |
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|
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fn = argument(1)+.5; |
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if (fn == 0) |
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return((double)nfiles); |
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if (fn < 1 || fn > nfiles) { |
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errno = EDOM; |
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return(0.0); |
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} |
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return(bright(input[fn-1].scan[xpos])); |
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return(colin(BRT)); |
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} |
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