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#ifndef lint |
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static const char RCSid[] = "$Id: ra_bn.c,v 2.7 2003/02/22 02:07:27 greg Exp $"; |
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#endif |
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/* |
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* ra_bn.c - program to convert between RADIANCE and barneyscan picture format. |
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* |
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* 10/12/88 |
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*/ |
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|
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#include <stdio.h> |
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#include <time.h> |
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#include <math.h> |
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|
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#include "platform.h" |
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#include "color.h" |
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#include "resolu.h" |
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|
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double gamcor = 2.0; /* gamma correction */ |
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|
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int bradj = 0; /* brightness adjustment */ |
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|
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char *progname; |
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|
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char errmsg[128]; |
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|
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FILE *rafp, *bnfp[3]; |
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|
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int xmax, ymax; |
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|
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|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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int reverse = 0; |
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int i; |
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SET_DEFAULT_BINARY(); |
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SET_FILE_BINARY(stdin); |
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SET_FILE_BINARY(stdout); |
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progname = argv[0]; |
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|
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'g': |
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gamcor = atof(argv[++i]); |
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break; |
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case 'r': |
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reverse = !reverse; |
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break; |
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case 'e': |
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if (argv[i+1][0] != '+' && argv[i+1][0] != '-') |
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goto userr; |
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bradj = atoi(argv[++i]); |
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break; |
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default: |
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goto userr; |
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} |
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else |
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break; |
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/* set gamma correction */ |
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setcolrgam(gamcor); |
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|
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if (reverse) { |
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if (i > argc-1 || i < argc-2) |
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goto userr; |
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if (openbarney(argv[i], "r") < 0) { |
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sprintf(errmsg, "cannot open input \"%s\"", argv[i]); |
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quiterr(errmsg); |
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} |
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if (i == argc-1 || !strcmp(argv[i+1], "-")) |
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rafp = stdout; |
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else if ((rafp = fopen(argv[i+1], "w")) == NULL) { |
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sprintf(errmsg, "cannot open output \"%s\"", |
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argv[i+1]); |
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quiterr(errmsg); |
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} |
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/* put header */ |
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newheader("RADIANCE", stdout); |
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printargs(i, argv, rafp); |
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fputformat(COLRFMT, rafp); |
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putc('\n', rafp); |
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fprtresolu(xmax, ymax, rafp); |
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/* convert file */ |
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bn2ra(); |
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} else { |
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if (i != argc-2) |
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goto userr; |
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if (!strcmp(argv[i], "-")) |
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rafp = stdin; |
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else if ((rafp = fopen(argv[i], "r")) == NULL) { |
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sprintf(errmsg, "cannot open input \"%s\"", |
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argv[i]); |
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quiterr(errmsg); |
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} |
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/* get header */ |
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if (checkheader(rafp, COLRFMT, NULL) < 0 || |
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fgetresolu(&xmax, &ymax, rafp) < 0) |
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quiterr("bad RADIANCE format"); |
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if (openbarney(argv[i+1], "w") < 0) { |
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sprintf(errmsg, "cannot open output \"%s\"", argv[i+1]); |
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quiterr(errmsg); |
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} |
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/* convert file */ |
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ra2bn(); |
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} |
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quiterr(NULL); |
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userr: |
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fprintf(stderr, "Usage: %s [-g gamma][-e +/-stops] {input|-} output\n", |
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progname); |
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fprintf(stderr, " or: %s -r [-g gamma][-e +/-stops] input [output|-]\n", |
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progname); |
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exit(1); |
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} |
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|
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|
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quiterr(err) /* print message and exit */ |
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char *err; |
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{ |
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if (err != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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exit(0); |
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} |
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|
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|
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openbarney(fname, mode) /* open barneyscan files */ |
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char *fname; |
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char *mode; |
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{ |
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static char suffix[3][4] = {"red", "grn", "blu"}; |
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int i; |
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char file[128]; |
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|
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for (i = 0; i < 3; i++) { |
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sprintf(file, "%s.%s", fname, suffix[i]); |
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if ((bnfp[i] = fopen(file, mode)) == NULL) |
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return(-1); |
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} |
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if (mode[0] == 'r') { /* get header */ |
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xmax = getint(bnfp[0]); |
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ymax = getint(bnfp[0]); |
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for (i = 1; i < 3; i++) |
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if (getint(bnfp[i]) != xmax || getint(bnfp[i]) != ymax) |
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return(-1); |
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} else { /* put header */ |
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for (i = 0; i < 3; i++) { |
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putint(xmax, bnfp[i]); |
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putint(ymax, bnfp[i]); |
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} |
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} |
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return(0); |
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} |
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|
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|
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int |
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getint(fp) /* get short int from barneyscan file */ |
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register FILE *fp; |
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{ |
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register short val; |
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|
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val = getc(fp); |
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val |= getc(fp) << 8; |
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|
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return(val); |
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} |
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|
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|
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putint(val, fp) /* put short int to barneyscan file */ |
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register int val; |
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register FILE *fp; |
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{ |
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putc(val&0xff, fp); |
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putc((val >> 8)&0xff, fp); |
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} |
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|
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|
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ra2bn() /* convert radiance to barneyscan */ |
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{ |
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register int i; |
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register COLR *inl; |
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int j; |
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|
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if ((inl = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
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quiterr("out of memory"); |
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for (j = 0; j < ymax; j++) { |
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if (freadcolrs(inl, xmax, rafp) < 0) |
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quiterr("error reading RADIANCE file"); |
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if (bradj) |
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shiftcolrs(inl, xmax, bradj); |
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colrs_gambs(inl, xmax); |
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for (i = 0; i < xmax; i++) { |
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putc(inl[i][RED], bnfp[0]); |
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putc(inl[i][GRN], bnfp[1]); |
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putc(inl[i][BLU], bnfp[2]); |
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} |
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if (ferror(bnfp[0]) || ferror(bnfp[1]) || ferror(bnfp[2])) |
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quiterr("error writing Barney files"); |
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} |
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free((void *)inl); |
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} |
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|
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|
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bn2ra() /* convert barneyscan to radiance */ |
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{ |
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register int i; |
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register COLR *outline; |
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int j; |
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|
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if ((outline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL) |
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quiterr("out of memory"); |
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for (j = 0; j < ymax; j++) { |
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for (i = 0; i < xmax; i++) { |
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outline[i][RED] = getc(bnfp[0]); |
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outline[i][GRN] = getc(bnfp[1]); |
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outline[i][BLU] = getc(bnfp[2]); |
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} |
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if (feof(bnfp[0]) || feof(bnfp[1]) || feof(bnfp[2])) |
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quiterr("error reading barney file"); |
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gambs_colrs(outline, xmax); |
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if (bradj) |
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shiftcolrs(outline, xmax, bradj); |
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if (fwritecolrs(outline, xmax, rafp) < 0) |
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quiterr("error writing RADIANCE file"); |
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} |
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free((void *)outline); |
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} |
