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#ifndef lint
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static const char RCSid[] = "$Id: ra_rgbe.c,v 2.25 2025/04/22 14:51:29 greg Exp $";
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#endif
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/*
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* program to convert from RADIANCE RLE to flat format
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*/
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#include <math.h>
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#include "platform.h"
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#include "rtio.h"
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#include "color.h"
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#include "resolu.h"
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#define dumpheader(fp) putbinary(headlines, 1, headlen, fp)
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int bradj = 0; /* brightness adjustment */
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int doflat = 1; /* produce flat file */
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int force = 0; /* force file overwrite? */
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int findframe = 0; /* find a specific frame? */
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int frameno = 0; /* current frame number */
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int fmterr = 0; /* got input format error */
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char *headlines = NULL; /* current header info. */
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int headlen1 = 0; /* length of initial frame header */
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int headlen = 0; /* current header length */
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char fmt[MAXFMTLEN]; /* input format */
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char *progname;
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static gethfunc addhline;
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static int transfer(char *ospec);
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static int loadheader(FILE *fp);
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int
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main(int argc, char *argv[])
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{
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char *ospec;
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int i;
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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 'r':
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doflat = !doflat;
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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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case 'n':
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findframe = atoi(argv[++i]);
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break;
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case 'f':
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force++;
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break;
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case '\0':
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goto gotfile;
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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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gotfile:
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if (i < argc-2)
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goto userr;
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if (i <= argc-1 && strcmp(argv[i], "-") &&
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freopen(argv[i], "r", stdin) == NULL) {
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fprintf(stderr, "%s: can't open input \"%s\"\n",
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progname, argv[i]);
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exit(1);
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}
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SET_FILE_BINARY(stdin);
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ospec = i==argc-2 ? argv[i+1] : (char *)NULL;
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while (transfer(ospec))
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;
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exit(0);
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userr:
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fprintf(stderr,
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"Usage: %s [-r][-e +/-stops][-f][-n frame] [input [outspec]]\n",
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progname);
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exit(1);
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}
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static int
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transfer( /* transfer a Radiance picture */
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char *ospec
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)
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{
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char oname[PATH_MAX];
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FILE *fp;
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int order;
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int xmax, ymax;
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COLR *scanin;
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int y;
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/* get header info. */
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if (!(y = loadheader(stdin)))
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return(0);
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if (y < 0 || (order = fgetresolu(&xmax, &ymax, stdin)) < 0) {
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fprintf(stderr, "%s: bad input format\n", progname);
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exit(1);
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}
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/* did we pass the target frame? */
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if (findframe && findframe < frameno)
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return(0);
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/* allocate scanline */
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scanin = (COLR *)malloc(xmax*sizeof(COLR));
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if (scanin == NULL) {
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perror(progname);
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exit(1);
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}
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/* skip frame? */
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if (findframe > frameno) {
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if (NCSAMP > 3) {
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if (fseek(stdin, ymax*xmax*LSCOLR, SEEK_CUR) < 0) {
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perror(progname);
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exit(1);
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}
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} else
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for (y = ymax; y--; )
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if (freadcolrs(scanin, xmax, stdin) < 0) {
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fprintf(stderr,
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"%s: error reading input picture\n",
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progname);
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exit(1);
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}
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free(scanin);
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return(1);
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}
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/* open output file/command */
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if (ospec == NULL) {
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strcpy(oname, "<stdout>");
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fp = stdout;
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} else {
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sprintf(oname, ospec, frameno);
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if (oname[0] == '!') {
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if ((fp = popen(oname+1, "w")) == NULL) {
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fprintf(stderr, "%s: cannot start \"%s\"\n",
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progname, oname);
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exit(1);
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}
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} else {
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if (!force && access(oname, 0) >= 0) {
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fprintf(stderr,
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"%s: output file \"%s\" exists\n",
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progname, oname);
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exit(1);
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}
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if ((fp = fopen(oname, "w")) == NULL) {
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fprintf(stderr, "%s: ", progname);
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perror(oname);
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exit(1);
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}
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}
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}
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SET_FILE_BINARY(fp);
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newheader("RADIANCE", fp); /* put out header */
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dumpheader(fp);
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fputs(progname, fp);
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if (bradj)
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fprintf(fp, " -e %+d", bradj);
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if (!doflat)
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fputs(" -r", fp);
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fputc('\n', fp);
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if (bradj)
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fputexpos(pow(2.0, (double)bradj), fp);
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if (frameno)
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fprintf(fp, "FRAME=%d\n", frameno);
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if (fmt[0])
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fputformat(fmt, fp);
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fputc('\n', fp);
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fputresolu(order, xmax, ymax, fp);
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/* transfer picture */
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for (y = ymax; y--; ) {
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if (fread2colrs(scanin, xmax, stdin, NCSAMP, WLPART) < 0) {
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fprintf(stderr, "%s: error reading input picture\n",
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progname);
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exit(1);
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}
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if (bradj)
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shiftcolrs(scanin, xmax, bradj);
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if (doflat ? (putbinary(scanin, sizeof(COLR), xmax, fp) != xmax) :
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(fwritecolrs(scanin, xmax, fp) < 0))
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goto writerr;
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}
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free(scanin); /* clean up */
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if (fflush(fp) == EOF)
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goto writerr;
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if (oname[0] == '!') {
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if (pclose(fp) != 0)
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fprintf(stderr, "%s: warning - bad status from \"%s\"\n",
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progname, oname);
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} else if (ospec != NULL)
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fclose(fp);
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return(1);
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writerr:
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fprintf(stderr, "%s: error writing output to \"%s\"\n",
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progname, oname);
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exit(1);
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}
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static int
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addhline( /* add a line to our info. header */
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char *s,
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void *p
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)
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{
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int n;
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if (isheadid(s))
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return(0);
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if (!strncmp(s, "FRAME=", 6)) {
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frameno = atoi(s+6);
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return(0);
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}
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if (formatval(fmt, s)) {
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if (!strcmp(fmt, SPECFMT))
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strcpy(fmt, COLRFMT);
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else
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fmterr += !globmatch(PICFMT, fmt);
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return(0);
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}
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if (isncomp(s)) {
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NCSAMP = ncompval(s);
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return(NCSAMP - 3);
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}
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if (iswlsplit(s)) {
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wlsplitval(WLPART, s);
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return(0);
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}
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n = strlen(s);
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if (headlen)
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headlines = (char *)realloc((void *)headlines, headlen+n+1);
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else
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headlines = (char *)malloc(n+1);
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if (headlines == NULL) {
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perror(progname);
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exit(1);
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}
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strcpy(headlines+headlen, s);
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headlen += n;
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return(0);
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}
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static int
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loadheader( /* load an info. header into memory */
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FILE *fp
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)
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{
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fmterr = 0; frameno = 0;
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/* revert to initial header length */
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if (!headlen1) headlen1 = headlen;
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else headlen = headlen1;
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if (getheader(fp, addhline, NULL) < 0)
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return(0);
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if (fmterr)
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return(-1);
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return(1);
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}
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