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- /* pbmtoeps.c - read a portable bitmap and produce Epson graphics
- **
- ** Copyright (C) 1990 by John Tiller (tiller@galois.msfc.nasa.gov)
- ** 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 int mask[] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
-
- int
- main( argc, argv )
- int argc;
- char* argv[];
- {
- FILE* ifp;
- bit** bits;
- bit* bP[8];
- int rows, cols, row, col, lastcol;
- int idx;
- int val;
-
-
- 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 );
-
- /* Change line spacing to 8/72 inches. */
- printf("\033A\010");
- /* Write out rows by eights. */
- for ( row = 0; row < rows; row += 8 )
- {
- /* Find end of lines. */
- for ( lastcol = cols-1; lastcol >= 0; --lastcol )
- {
- for ( idx = 0; idx < 8 && row+idx < rows; ++idx )
- if ( bits[row+idx][lastcol] == PBM_BLACK )
- break;
- if ( idx < 8 && row+idx < rows )
- break;
- }
- for ( idx = 0; idx < 8 && row+idx < rows; ++idx )
- bP[idx] = bits[row+idx];
- /* Put in plotter (1:1) graphics. */
- if ( lastcol >= 0 )
- printf("\033*\005%c%c", (lastcol+1)%256, (lastcol+1)/256);
- for ( col = 0; col <= lastcol; ++col )
- {
- val = 0;
- for ( idx = 0; idx < 8 && row+idx < rows; ++idx )
- if ( *bP[idx] == PBM_BLACK )
- val |= mask[idx];
- putchar( val );
- for ( idx = 0; idx < 8 && row+idx < rows; ++idx )
- ++bP[idx];
- }
- putchar( '\n' );
- }
- putchar( '\f' );
- /* Restore normal line spacing. */
- printf("\033@");
- exit( 0 );
- }
-