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/* pbmtopi3.c - read a portable bitmap and produce a Atari Degas .pi3 file
**
** Module created from other pbmplus tools by David Beckemeyer.
**
** Copyright (C) 1988 by David Beckemeyer and 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 <stdio.h>
#include "pbm.h"
static void putinit ARGS(( void ));
static void putbit ARGS(( bit b ));
static void putrest ARGS(( void ));
static void putitem ARGS(( void ));
int
main( argc, argv )
int argc;
char* argv[];
{
FILE* ifp;
bit* bitrow;
register bit* bP;
int rows, cols, format, padright, row, col;
pbm_init( &argc, argv );
if ( argc > 2 )
pm_usage( "[pbmfile]" );
if ( argc == 2 )
ifp = pm_openr( argv[1] );
else
ifp = stdin;
pbm_readpbminit( ifp, &cols, &rows, &format );
if (cols > 640)
cols = 640;
if (rows > 400)
rows = 400;
bitrow = pbm_allocrow( cols );
/* Compute padding to round cols up to 640 */
padright = 640 - cols;
putinit( );
for ( row = 0; row < rows; ++row )
{
pbm_readpbmrow( ifp, bitrow, cols, format );
for ( col = 0, bP = bitrow; col < cols; ++col, ++bP )
putbit( *bP );
for ( col = 0; col < padright; ++col )
putbit( 0 );
}
while (row++ < 400)
for ( col = 0; col < 640; ++col)
putbit( 0 );
pm_close( ifp );
putrest( );
exit( 0 );
}
static char item;
static short bitsperitem, bitshift;
static void
putinit( )
{
int i;
if (pm_writebigshort (stdout, (short) 2) == -1
|| pm_writebigshort (stdout, (short) 0x777) == -1)
pm_error ("write error");
for (i = 1; i < 16; i++)
if (pm_writebigshort (stdout, (short) 0) == -1)
pm_error ("write error");
item = 0;
bitsperitem = 0;
bitshift = 7;
}
static void
putbit( bit b )
{
if (bitsperitem == 8)
putitem( );
++bitsperitem;
if ( b == PBM_BLACK )
item += 1 << bitshift;
--bitshift;
}
static void
putrest( )
{
if ( bitsperitem > 0 )
putitem( );
}
static void
putitem( )
{
putc (item, stdout);
item = 0;
bitsperitem = 0;
bitshift = 7;
}
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