diff options
Diffstat (limited to 'converter/pbm/pbmtomgr.c')
-rw-r--r-- | converter/pbm/pbmtomgr.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/converter/pbm/pbmtomgr.c b/converter/pbm/pbmtomgr.c new file mode 100644 index 00000000..7a6e7fc1 --- /dev/null +++ b/converter/pbm/pbmtomgr.c @@ -0,0 +1,120 @@ +/* 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 ); + 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; + } |