/* ppmtomptool.c - generates a MPEGTool format RGB file from a PPM file 
   ( Hacked by minor modifications to ppmtorgb3.c. Not the most
     efficient way to do things but it works. New append mode  
     added to make it easier to generate sequences of images - Pramod )
**
** Copyright (C) 1991 by Jef Poskanzer.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation.  This software is provided "as is" without express or
** implied warranty.
*/

#include "ppm.h"
#include "pgm.h"

FILE *pm_opena();

FILE*
pm_opena( name )
    char* name;
    {
    FILE* f;

#ifdef MSDOS
    f = fopen( name, "wb" );
#else /*MSDOS*/
    f = fopen( name, "a+" );
#endif /*MSDOS*/
    if ( f == NULL )
	{
	pm_perror( name );
	exit( 1 );
	}
    return f;
    }


void
main( argc, argv )
    int argc;
    char* argv[];
    {
    FILE* ifp;
    FILE* file;
    int i;
    char* basename;
    char filename[100];
    char* cp;
    pixel* pixelrow;
    register pixel* pP;
    gray** grayrow;
    register gray* gP;
    int rows, cols, format, row;
    register int col;
    pixval maxval;

    ppm_init( &argc, argv );

    if ( argc == 2 || argc > 3 )
	pm_usage( "[ppmfile mptoolfile]" );

    if ( argc == 3 )
      {
	ifp = pm_openr( argv[1] );
	basename = argv[2];
      }
    else
      {
	ifp = stdin;
	basename = "noname";
      }

    ppm_readppminit( ifp, &cols, &rows, &maxval, &format );
    pixelrow = ppm_allocrow( cols );
    (void) strcpy( filename, basename );
    (void) strcat( filename, ".mpt");
    file = pm_opena( filename );
    grayrow = (gray **)malloc(rows*3*sizeof(struct gray *));
    for (i=0; i < rows*3; i++)
      grayrow[i] = pgm_allocrow( cols );

    for ( row = 0; row < rows; ++row )
      {
	ppm_readppmrow( ifp, pixelrow, cols, maxval, format );
	for ( col = 0, pP = pixelrow, gP = grayrow[row]; col < cols;
	     ++col, ++pP, ++gP )
	  *gP = (gray) PPM_GETR( *pP );
	for ( col = 0, pP = pixelrow, gP = grayrow[row + rows]; col < cols;
	     ++col, ++pP, ++gP )
	  *gP = (gray) PPM_GETG( *pP );
	for ( col = 0, pP = pixelrow, gP = grayrow[row + 2*rows]; col < cols;
	     ++col, ++pP, ++gP )
	  *gP = (gray) PPM_GETB( *pP );
      }
    for ( i = 0; i < rows*3; i++)
      pgm_writepgmrow( file, grayrow[i], cols, maxval, 0 );
    pm_close( ifp );
    pm_close( file );

    exit( 0 );
    }