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#ifndef lint
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static const char RCSid[] = "$Id$";
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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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#include <stdio.h>
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#ifdef MSDOS
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#include <fcntl.h>
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#endif
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#include <time.h>
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#include <math.h>
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#include "color.h"
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#include "resolu.h"
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double gamcor = 2.0; /* gamma correction */
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int bradj = 0; /* brightness adjustment */
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char *progname;
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char errmsg[128];
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FILE *rafp, *bnfp[3];
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int xmax, ymax;
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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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#ifdef MSDOS
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extern int _fmode;
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_fmode = O_BINARY;
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setmode(fileno(stdin), O_BINARY);
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setmode(fileno(stdout), O_BINARY);
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#endif
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progname = argv[0];
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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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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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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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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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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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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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val = getc(fp);
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val |= getc(fp) << 8;
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return(val);
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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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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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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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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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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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}
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