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