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/* pbmtomgr.c - read a portable bitmap and produce a MGR bitmap
**
** Copyright (C) 1989 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 "pbm.h"
#include "mgr.h"
static void putinit ARGS(( int rows, int cols ));
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 > 4095)
pm_error("Image width too large: %u (max: 4095)", cols);
if (rows > 4095)
pm_error("Image heigth too large: %u (max: 4095)", cols);
bitrow = pbm_allocrow( cols );
/* Round cols up to the nearest multiple of 8. */
padright = ( ( cols + 7 ) / 8 ) * 8 - cols;
putinit( rows, cols );
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 );
}
pm_close( ifp );
putrest( );
exit( 0 );
}
static unsigned char item;
static int bitsperitem, bitshift;
static void
putinit( rows, cols )
int rows, cols;
{
struct b_header head;
head.magic[0] = 'y';
head.magic[1] = 'z';
head.h_wide = ( ( cols >> 6 ) & 0x3f ) + ' ';
head.l_wide = ( cols & 0x3f ) + ' ';
head.h_high = ( ( rows >> 6 ) & 0x3f ) + ' ';
head.l_high = ( rows & 0x3f ) + ' ';
head.depth = ( 1 & 0x3f ) + ' ';
head._reserved = ' ';
fwrite( &head, sizeof(head), 1, stdout );
item = 0;
bitsperitem = 0;
bitshift = 7;
}
#if __STDC__
static void
putbit( bit b )
#else /*__STDC__*/
static void
putbit( b )
bit b;
#endif /*__STDC__*/
{
if ( bitsperitem == 8 )
putitem( );
++bitsperitem;
if ( b == PBM_BLACK )
item += 1 << bitshift;
--bitshift;
}
static void
putrest( )
{
if ( bitsperitem > 0 )
putitem( );
}
static void
putitem( )
{
fwrite( &item, sizeof(item), 1, stdout );
item = 0;
bitsperitem = 0;
bitshift = 7;
}
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