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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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|
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#include <math.h> |
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|
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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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|
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#define dumpheader(fp) putbinary(headlines, 1, headlen, fp) |
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|
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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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|
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char *progname; |
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|
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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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|
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|
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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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|
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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 '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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|
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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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|
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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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|
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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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|
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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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|
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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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} |
