TeX 1995 July/TeX CD-ROM July 1995 (Disc 1)(Walnut Creek)(1995).ISO/graphics/tiff/tools/ppm2tiff.c

C/C++ Source or Header | 1992-02-10 | 5KB | 170 lines

#ifndef lint
static char rcsid[] = "$Header: /usr/people/sam/tiff/tools/RCS/ppm2tiff.c,v 1.5 92/02/10 19:04:14 sam Exp $";
#endif

/*
 * Copyright (c) 1991, 1992 Sam Leffler
 * Copyright (c) 1991, 1992 Silicon Graphics, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software and
 * its documentation for any purpose is hereby granted without fee, provided
 * that (i) the above copyright notices and this permission notice appear in
 * all copies of the software and related documentation, and (ii) the names of
 * Sam Leffler and Silicon Graphics may not be used in any advertising or
 * publicity relating to the software without the specific, prior written
 * permission of Sam Leffler and Silicon Graphics.
 *
 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
 *
 * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
 * OF THIS SOFTWARE.
 */

#include <stdio.h>
#include "tiffio.h"

typedef    unsigned char u_char;
typedef    unsigned short u_short;
typedef    unsigned long u_long;

#define    howmany(x, y)    (((x)+((y)-1))/(y))
#define    streq(a,b)    (strcmp(a,b) == 0)

u_short    compression = -1;
u_short    photometric;
u_long    rowsperstrip = (u_long) -1;

static
BadPPM(file)
    char *file;
{
    fprintf(stderr, "%s: Not a PPM file.\n", file);
    exit(-2);
}

main(argc, argv)
    char *argv[];
{
    u_char *buf;
    int row, linebytes, spp;
    TIFF *out;
    FILE *in;
    int c, w, h, prec;
    char *infile;

    argc--, argv++;
    if (argc < 1)
        usage();
    for (; argc > 1 && argv[0][0] == '-'; argc--, argv++) {
        if (streq(argv[0], "-none")) {
            compression = COMPRESSION_NONE;
            continue;
        }
        if (streq(argv[0], "-packbits")) {
            compression = COMPRESSION_PACKBITS;
            continue;
        }
        if (streq(argv[0], "-lzw")) {
            compression = COMPRESSION_LZW;
            continue;
        }
        if (streq(argv[0], "-rowsperstrip")) {
            argc--, argv++;
            rowsperstrip = atoi(argv[0]);
            continue;
        }
        usage();
    }

    /*
     * If only one file is specified, read input from
     * stdin; otherwise usage is: ppm2tiff input output.
     */
    if (argc > 1) {
        infile = argv[0];
        argv++;
        in = fopen(infile, "r");
        if (in == NULL) {
            fprintf(stderr, "%s: Can not open.\n", infile);
            exit(-1);
        }
    } else {
        infile = "<stdin>";
        in = stdin;
    }

    if (getc(in) != 'P')
        BadPPM(infile);
    switch (c = getc(in)) {
    case '5':            /* it's a PGM file */
        spp = 1;
        photometric = PHOTOMETRIC_MINISBLACK;
        break;
    case '6':            /* it's a PPM file */
        spp = 3;
        photometric = PHOTOMETRIC_RGB;
        break;
    default:
        BadPPM(infile);
    }
    if (fscanf(in, " %d %d %d", &w, &h, &prec) != 3)
        BadPPM(infile);
    if (getc(in) != '\n' || w <= 0 || h <= 0 || prec != 255)
        BadPPM(infile);

    out = TIFFOpen(argv[0], "w");
    if (out == NULL)
        exit(-4);
    TIFFSetField(out, TIFFTAG_IMAGEWIDTH, (u_long) w);
    TIFFSetField(out, TIFFTAG_IMAGELENGTH, (u_long) h);
    TIFFSetField(out, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
    TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, spp);
    TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 8);
    TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
    TIFFSetField(out, TIFFTAG_PHOTOMETRIC, photometric);
    if (compression == (u_short)-1)
        compression = COMPRESSION_LZW;
    TIFFSetField(out, TIFFTAG_COMPRESSION, compression);
    linebytes = spp * w;
    if (TIFFScanlineSize(out) > linebytes)
        buf = (u_char *)malloc(linebytes);
    else
        buf = (u_char *)malloc(TIFFScanlineSize(out));
    if (rowsperstrip == (u_long)-1)
        rowsperstrip = (8*1024)/linebytes;
    TIFFSetField(out, TIFFTAG_ROWSPERSTRIP,
        rowsperstrip == 0 ? 1L : rowsperstrip);
    for (row = 0; row < h; row++) {
        if (fread(buf, linebytes, 1, in) != 1) {
            fprintf(stderr, "%s: scanline %d: Read error.\n",
                infile, row);
            break;
        }
        if (TIFFWriteScanline(out, buf, row, 0) < 0)
            break;
    }
    (void) TIFFClose(out);
}

usage()
{
    fprintf(stderr, "usage: ppm2tif [options] [input] output\n");
    fprintf(stderr, "where options are:\n");
    fprintf(stderr,
        " -lzw\t\tcompress output with Lempel-Ziv & Welch encoding\n");
    fprintf(stderr,
        " -packbits\tcompress output with packbits encoding\n");
    fprintf(stderr,
        " -none\t\tuse no compression algorithm on output\n");
    fprintf(stderr, "\n");
    fprintf(stderr,
        " -rowsperstrip #\tmake each strip have no more than # rows\n");
    exit(-1);
}