converter/other/pamtopam.c


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/*----------------------------------------------------------------------------
                               pamtopam
------------------------------------------------------------------------------
  Part of the Netpbm package.

  Copy PAM and PNM (i.e. PBM, PGM, or PPM) images from Standard Input
  to Standard Output (while converting PNM images to PAM)
-----------------------------------------------------------------------------*/

#include "pm_c_util.h"
#include "pam.h"

int
main(int argc, char *argv[]) {

    bool       eof;     /* no more images in input stream */
    struct pam inpam;   /* Input PAM image */
    struct pam outpam;  /* Output PAM image */

    pm_proginit(&argc, argv);

    if (argc-1 != 0)
        pm_error("Program takes no arguments.  Input is from Standard Input");

    eof = FALSE;
    while (!eof) {
        pnm_readpaminit(stdin, &inpam, PAM_STRUCT_SIZE(tuple_type));

        outpam = inpam;
        outpam.file = stdout;
        outpam.format = PAM_FORMAT;

        pnm_writepaminit(&outpam);

        {
            tuple * tuplerow;

            tuplerow = pnm_allocpamrow(&inpam);
            {
                unsigned int row;

                for (row = 0; row < inpam.height; ++row) {
                    pnm_readpamrow(&inpam, tuplerow);
                    pnm_writepamrow(&outpam, tuplerow);
                }
            }
            pnm_freepamrow(tuplerow);
        }
        pnm_nextimage(stdin, &eof);
    }

    return 0;
}