AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2002.02.27 02:53 "Must set "ImageWidth" before writing data", by Stephen Rasku
2002.02.28 17:56 "Re: Must set "ImageWidth" before writing data", by Stephen Rasku
2002.02.28 19:19 "RE: Must set "ImageWidth" before writing data", by Michael Payne

2002.02.28 19:19 "RE: Must set "ImageWidth" before writing data", by Michael Payne

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

#define OUTFILE         "tiffcreate.tif"
#define NUMROWS         10
#define IMAGE_WIDTH     16
#define BYTES_PER_BUF   IMAGE_WIDTH/8

unsigned char blackbuf[BYTES_PER_BUF];
unsigned char whitebuf[BYTES_PER_BUF];

void myHandler(const char *module, const char *fmt, va_list ap) {
    fprintf(stderr, "%s: ", module);
    fprintf(stderr, fmt, ap);
    fprintf(stderr, "\n");
}

main(int argc, char *argv[])
{

    TIFFSetErrorHandler(myHandler);

    do {
        TIFF *tif;
        int row;

        memset(blackbuf, -1, BYTES_PER_BUF);
        memset(whitebuf, 0, BYTES_PER_BUF);

        if ( !( tif = TIFFOpen(OUTFILE, "w") ) )
        {
            fprintf(stderr, "%s: Error opening file %s\n", argv[0], OUTFILE);
            break;
        }
        if ( !(TIFFSetField(tif, TIFFTAG_COMPRESSION, COMPRESSION_CCITTFAX3) &&
            TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, (unsigned)IMAGE_WIDTH) &&
            TIFFSetField(tif, TIFFTAG_IMAGELENGTH, (unsigned)NUMROWS) &&
            TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, (unsigned)1) ) )
                break;

        /* don't forget to set these =) */
        TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, 2);
        TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, 0);
        TIFFSetField(tif, TIFFTAG_PLANARCONFIG, 1);

        TIFFSetField(tif, TIFFTAG_YRESOLUTION, 196.);
        TIFFSetField(tif, TIFFTAG_XRESOLUTION, 204.);


        /* changed IMAGEWIDTH to BYTES_PER_BUF */
        for (row = 0; row < NUMROWS; ++row)
           if ( TIFFWriteEncodedStrip(tif, row, (row % 2) ? blackbuf : whitebuf, BYTES_PER_BUF) == -1) break;

        /* put this after you write the strips */
        TIFFWriteDirectory(tif);

        TIFFClose(tif);
    } while(0);
}