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- /* pbmtoascii.c - read a portable bitmap and produce ASCII graphics
- **
- ** Copyright (C) 1988 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"
-
- void
- main( argc, argv )
- int argc;
- char* argv[];
- {
- FILE* ifp;
- bit** bits;
- register bit* bP;
- register bit* b1P;
- int rows, cols, row, lastcol;
- register int col;
-
- pbm_init( &argc, argv );
-
- if ( argc > 2 )
- pm_usage( "[pbmfile]" );
-
- if ( argc == 2 )
- ifp = pm_openr( argv[1] );
- else
- ifp = stdin;
-
- bits = pbm_readpbm( ifp, &cols, &rows );
-
- pm_close( ifp );
-
- /* Write out rows by twos. */
- for ( row = 0; row < rows; row += 2 )
- {
- /* Find end of lines. */
- for ( lastcol = cols-1; lastcol > 0; --lastcol )
- {
- if ( bits[row][lastcol] == PBM_BLACK )
- break;
- if ( row+1 < rows && bits[row+1][lastcol] == PBM_BLACK )
- break;
- }
- for ( col = 0, bP = bits[row], b1P = bits[row+1]; col <= lastcol; ++col, ++bP, ++b1P )
- {
- if ( *bP == PBM_WHITE )
- {
- if ( row+1 >= rows || *b1P == PBM_WHITE )
- putchar( ' ' );
- else
- putchar( 'o' );
- }
- else
- {
- if ( row+1 >= rows || *b1P == PBM_WHITE )
- putchar( '"' );
- else
- putchar( '$' );
- }
- }
- putchar( '\n' );
- }
-
- pm_close (stdout);
- exit( 0 );
- }
-