text: /* pbmtox10bm.c - read a portable bitmap and produce an X10 bitmap file
  **
  ** 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 <string.h>
  #include "pbm.h"
  
  int
  main( argc, argv )
      int argc;
      char* argv[];
      {
      FILE* ifp;
      bit* bitrow;
      register bit* bP;
      int rows, cols, format, padright, row;
      register int col;
      char name[100];
      char* cp;
      int itemsperline;
      register int bitsperitem;
      register int item;
      int firstitem;
      const char* const hexchar = "0123456789abcdef";
  
  
      pbm_init( &argc, argv );
  
      if ( argc > 2 )
  	pm_usage( "[pbmfile]" );
  
      if ( argc == 2 )
  	{
  	ifp = pm_openr( argv[1] );
  	strcpy( name, argv[1] );
  	if ( strcmp( name, "-" ) == 0 )
  	    strcpy( name, "noname" );
  
  	if ( ( cp = strchr( name, '.' ) ) != 0 )
  	    *cp = '\0';
  	}
      else
  	{
  	ifp = stdin;
  	strcpy( name, "noname" );
  	}
  
      pbm_readpbminit( ifp, &cols, &rows, &format );
      bitrow = pbm_allocrow( cols );
  
      /* Compute padding to round cols up to the nearest multiple of 16. */
      overflow_add(cols, 15);
      padright = ( ( cols + 15 ) / 16 ) * 16 - cols;
  
      printf( "#define %s_width %d\n", name, cols );
      printf( "#define %s_height %d\n", name, rows );
      printf( "static short %s_bits[] = {\n", name );
  
      itemsperline = 0;
      bitsperitem = 0;
      item = 0;
      firstitem = 1;
  
  #define PUTITEM \
      { \
      if ( firstitem ) \
  	firstitem = 0; \
      else \
  	putchar( ',' ); \
      if ( itemsperline == 11 ) \
  	{ \
  	putchar( '\n' ); \
  	itemsperline = 0; \
  	} \
      if ( itemsperline == 0 ) \
  	putchar( ' ' ); \
      ++itemsperline; \
      putchar('0'); \
      putchar('x'); \
      putchar(hexchar[item >> 12]); \
      putchar(hexchar[(item >> 8) & 15]); \
      putchar(hexchar[(item >> 4) & 15]); \
      putchar(hexchar[item & 15]); \
      bitsperitem = 0; \
      item = 0; \
      }
  
  #define PUTBIT(b) \
      { \
      if ( bitsperitem == 16 ) \
  	PUTITEM; \
      if ( (b) == PBM_BLACK ) \
  	item += 1 << bitsperitem; \
      ++bitsperitem; \
      }
  
      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 );
      
      if ( bitsperitem > 0 )
  	PUTITEM;
      printf( "};\n" );
  
      exit( 0 );
      }
  