/*
    Amiga port by Oliver Gantert

    27.04.2000 - fixed some compiler warnings
*/
/*

ORBIT, a freeware space combat simulator
Copyright (C) 1999  Steve Belczyk <steve1@genesis.nred.ma.us>

This program 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.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#include "orbit.h"

void ScreenShot()
{
  char fname[32];
  char *screen;
  FILE *fd;
  int x, y, c;

  /* Construct file name */
  sprintf (fname, "orbit%03d.ppm", screen_shot_num);
  screen_shot_num++;

  /* Allocate space for screen */
  if (NULL == (screen = (char *) malloc (ScreenWidth*ScreenHeight*3)))
  {
    Cprint ("Can't allocate memory for screen shot");
    return;
  }

  /* Get frame buffer */
  glReadPixels (0, 0, ScreenWidth, ScreenHeight, GL_RGB,
  GL_UNSIGNED_BYTE, screen);

  /* Open the file */
  if (NULL == (fd = fopen (fname, "wb")))
  {
    Cprint ("Can't open screen shot file");
    free (screen);
    return;
  }

  /* Write the PPM file */
  fprintf (fd, "P6\n%d %d\n255\n", ScreenWidth, ScreenHeight);

  for (y=0; y<ScreenHeight; y++)
  {
    for (x=0; x<ScreenWidth; x++)
    {
      c = 0xff & *screen++;
      fputc (c, fd);
      c = 0xff & *screen++;
      fputc (c, fd);
      c = 0xff & *screen++;
      fputc (c, fd);
    }
  }

  /* Close and clean up */
  fclose (fd);
  free (screen);
  Cprint ("Screen shot saved in %s", fname);
}