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- /* Copyright (c) 1991 Regents of the University of California */
-
- #ifndef lint
- static char SCCSid[] = "@(#)ra_tiff.c 2.2 12/19/91 LBL";
- #endif
-
- /*
- * program to convert between RADIANCE and 24-bit TIFF files.
- */
-
- #include <stdio.h>
-
- #include "tiffio.h"
-
- #include "color.h"
-
- #include "resolu.h"
-
-
- extern char *malloc(), *realloc();
-
- int lzcomp = 0; /* use Lempel-Ziv compression? */
-
- int greyscale = 0; /* produce greyscale image? */
-
- double gamma = 2.2; /* gamma correction */
-
- int bradj = 0; /* brightness adjustment */
-
- char *progname;
-
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- int reverse = 0;
- int i;
-
- progname = argv[0];
-
- for (i = 1; i < argc; i++)
- if (argv[i][0] == '-')
- switch (argv[i][1]) {
- case 'g':
- gamma = atof(argv[++i]);
- break;
- case 'z':
- lzcomp = !lzcomp;
- break;
- case 'b':
- greyscale = !greyscale;
- break;
- case 'e':
- if (argv[i+1][0] != '+' && argv[i+1][0] != '-')
- goto userr;
- bradj = atoi(argv[++i]);
- break;
- case 'r':
- reverse = !reverse;
- break;
- case '\0':
- goto doneopts;
- default:
- goto userr;
- }
- else
- break;
- doneopts:
- setcolrgam(gamma);
-
- if (reverse)
- if (i != argc-2 && i != argc-1)
- goto userr;
- else
- tiff2ra(argv[i], argv[i+1]);
- else
- if (i != argc-2)
- goto userr;
- else
- ra2tiff(argv[i], argv[i+1]);
-
- exit(0);
- userr:
- fprintf(stderr,
- "Usage: %s [-r][-b][-z][-e +/-stops][-g gamma] input output\n",
- progname);
- exit(1);
- }
-
-
- quiterr(err) /* print message and exit */
- char *err;
- {
- if (err != NULL) {
- fprintf(stderr, "%s: %s\n", progname, err);
- exit(1);
- }
- exit(0);
- }
-
-
- tiff2ra(inpf, outf) /* convert TIFF file to Radiance picture */
- char *inpf, *outf;
- {
- unsigned long xmax, ymax;
- TIFF *tif;
- unsigned short pconfig, nsamps;
- unsigned short hi;
- register BYTE *scanin;
- register COLR *scanout;
- register int x;
- int y;
- /* open/check TIFF file */
- if ((tif = TIFFOpen(inpf, "r")) == NULL)
- quiterr("cannot open TIFF input");
- if (!TIFFGetField(tif, TIFFTAG_SAMPLESPERPIXEL, &nsamps) ||
- (nsamps != 1 && nsamps != 3))
- quiterr("unsupported samples per pixel");
- if (!TIFFGetField(tif, TIFFTAG_BITSPERSAMPLE, &hi) || hi != 8)
- quiterr("unsupported bits per sample");
- if (TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &hi) &&
- hi != (nsamps==1 ? 1 : 2))
- quiterr("unsupported photometric interpretation");
- if (!TIFFGetField(tif, TIFFTAG_PLANARCONFIG, &pconfig) ||
- (pconfig != 1 && pconfig != 2))
- quiterr("unsupported planar configuration");
- if (!TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &xmax) ||
- !TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &ymax))
- quiterr("unknown input image resolution");
- /* allocate scanlines */
- scanin = (BYTE *)malloc(TIFFScanlineSize(tif));
- scanout = (COLR *)malloc(xmax*sizeof(COLR));
- if (scanin == NULL || scanout == NULL)
- quiterr("out of memory in tiff2ra");
- /* open output and write header */
- if (outf != NULL && strcmp(outf, "-") &&
- freopen(outf, "w", stdout) == NULL)
- quiterr("cannot open Radiance output file");
- fputs(progname, stdout);
- if (bradj)
- printf(" -e %+d", bradj);
- fputs(" -r\n", stdout);
- fputformat(COLRFMT, stdout);
- putchar('\n');
- fprtresolu(xmax, ymax, stdout);
- /* convert image */
- if (nsamps == 1)
- pconfig = 1;
- for (y = 0; y < ymax; y++) {
- if (pconfig == 1) {
- if (TIFFReadScanline(tif, scanin, y, 0) < 0)
- goto readerr;
- if (nsamps == 1)
- for (x = 0; x < xmax; x++)
- scanout[x][RED] =
- scanout[x][GRN] =
- scanout[x][BLU] = scanin[x];
- else
- for (x = 0; x < xmax; x++) {
- scanout[x][RED] = scanin[3*x];
- scanout[x][GRN] = scanin[3*x+1];
- scanout[x][BLU] = scanin[3*x+2];
- }
- } else {
- if (TIFFReadScanline(tif, scanin, y, 0) < 0)
- goto readerr;
- for (x = 0; x < xmax; x++)
- scanout[x][RED] = scanin[x];
- if (TIFFReadScanline(tif, scanin, y, 1) < 0)
- goto readerr;
- for (x = 0; x < xmax; x++)
- scanout[x][GRN] = scanin[x];
- if (TIFFReadScanline(tif, scanin, y, 2) < 0)
- goto readerr;
- for (x = 0; x < xmax; x++)
- scanout[x][BLU] = scanin[x];
- }
- gambs_colrs(scanout, xmax);
- if (bradj)
- shiftcolrs(scanout, xmax, bradj);
- if (fwritecolrs(scanout, xmax, stdout) < 0)
- quiterr("error writing Radiance picture");
- }
- /* clean up */
- free((char *)scanin);
- free((char *)scanout);
- TIFFClose(tif);
- return;
- readerr:
- quiterr("error reading TIFF input");
- }
-
-
- ra2tiff(inpf, outf) /* convert Radiance file to 24-bit TIFF */
- char *inpf, *outf;
- {
- TIFF *tif;
- int xmax, ymax;
- BYTE *scanout;
- COLR *scanin;
- register int x;
- int y;
- /* open Radiance file */
- if (strcmp(inpf, "-") && freopen(inpf, "r", stdin) == NULL)
- quiterr("cannot open Radiance input file");
- if (checkheader(stdin, COLRFMT, NULL) < 0 ||
- fgetresolu(&xmax, &ymax, stdin) < 0)
- quiterr("bad Radiance picture");
- /* open TIFF file */
- if ((tif = TIFFOpen(outf, "w")) == NULL)
- quiterr("cannot open TIFF output");
- TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (unsigned long)xmax);
- TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (unsigned long)ymax);
- TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, greyscale ? 1 : 3);
- TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
- TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, greyscale ? 1 : 2);
- TIFFSetField(tif, TIFFTAG_PLANARCONFIG, 1);
- if (lzcomp)
- TIFFSetField(tif, TIFFTAG_COMPRESSION, (unsigned short)5);
- /* allocate scanlines */
- scanin = (COLR *)malloc(xmax*sizeof(COLR));
- scanout = (BYTE *)malloc(TIFFScanlineSize(tif));
- if (scanin == NULL || scanout == NULL)
- quiterr("out of memory in ra2tiff");
- /* convert image */
- for (y = 0; y < ymax; y++) {
- if (freadcolrs(scanin, xmax, stdin) < 0)
- quiterr("error reading Radiance picture");
- if (bradj)
- shiftcolrs(scanin, xmax, bradj);
- if (greyscale) {
- for (x = 0; x < xmax; x++)
- scanin[x][GRN] = normbright(scanin[x]);
- colrs_gambs(scanin, xmax);
- for (x = 0; x < xmax; x++)
- scanout[x] = scanin[x][GRN];
- } else {
- colrs_gambs(scanin, xmax);
- for (x = 0; x < xmax; x++) {
- scanout[3*x] = scanin[x][RED];
- scanout[3*x+1] = scanin[x][GRN];
- scanout[3*x+2] = scanin[x][BLU];
- }
- }
- if (TIFFWriteScanline(tif, scanout, y, 0) < 0)
- quiterr("error writing TIFF output");
- }
- /* clean up */
- free((char *)scanin);
- free((char *)scanout);
- TIFFClose(tif);
- }
-