maketemplate.cpp

从Bwwvers的个人网站上下载的源码

/*
  ktracker (c) 2006 Kris Beevers

  This file is part of ktracker.

  ktracker is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  ktracker is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with ktracker; if not, write to the Free Software Foundation,
  Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

  $Id: maketemplate.cpp,v 1.1.1.1 2006/10/10 20:41:29 beevek Exp $
*/

#include <stdio.h>
#include <inttypes.h>

// in pgm.cpp
extern bool load_ppm(const char *file, uint8_t **grid, uint32_t *w, uint32_t *h);
extern bool write_ppm(const char *file, const uint8_t *grid, uint32_t w, uint32_t h);

int main(int argc, char **argv)
{
  if(argc < 3) {
    printf("Usage: %s input.ppm output.ppm\n", argv[0]);
    return 1;
  }

  uint8_t *in, *out;
  uint32_t inw, inh, keep = 0;

  if(!load_ppm(argv[1], &in, &inw, &inh)) {
    perror("load_ppm()");
    return 1;
  }

  // keep all non-black pixels
  out = new uint8_t[inw*inh*3];
  for(uint32_t i = 0; i < inw*inh*3; i += 3) {
    if(in[i] == 0 && in[i+1] == 0 && in[i+2] == 0)
      continue;
    out[keep++] = in[i];
    out[keep++] = in[i+1];
    out[keep++] = in[i+2];
  }

  if(!write_ppm(argv[2], out, keep/3, 1)) {
    perror("write_ppm()");
    return 1;
  }

  return 0;
}