rletoascii.c File Reference

#include <stdio.h>
#include "rle.h"

Include dependency graph for rletoascii.c:

Go to the source code of this file.

Typedefs
typedef FILE *	FILPTR

Functions
void	main (int argc, argv)

Variables
static char	default_asciistr [] = "@BR*#$PX0woIcv:+!~\"., "

Typedef Documentation

typedef FILE* FILPTR

Definition at line 26 of file rletoascii.c.

Function Documentation

void main	(	int	argc,
		argv
	)

Definition at line 63 of file rletoascii.c.

{
    char   *infnam = NULL;  /* Input file name. */
    rle_hdr hdr;
    int nrow, nscan, i, row, index, rflag=0;
    unsigned char ** scan;
    unsigned char * buffer;
    char *asciistr = NULL;
    int numchars;

    if (! scanargs( argc,argv,
            "% S%-ascii_string!s r%- infile%s\n(\
\t-S\tSpecify set of characters for output (dark to light).\n\
\t-r\tReverse black & white -- white on black.)",
            &i, &asciistr, &rflag, &infnam ))
    exit( -1 );

    /* Set up header. */
    hdr = *rle_hdr_init( (rle_hdr *)NULL );
    rle_names( &hdr, cmd_name( argv ), infnam, 0 );
    hdr.rle_file = rle_open_f( hdr.cmd, infnam, "r" );

    /* Read header information. */

    rle_get_setup_ok( &hdr, "rletoascii", infnam );
    if ( hdr.ncolors == 0 )
    {
    fprintf( stderr, "%s: Image %s has no data.\n",
         hdr.cmd, hdr.file_name );
    exit( 1 );
    }

    if ( hdr.ncolors > 3 ) {
    fprintf( stderr,
         "%s: Only first 3 channels (out of %d) in %s are shown.\n",
         hdr.cmd, hdr.ncolors, hdr.file_name );
    for ( i = 3; i < hdr.ncolors; i++ )
        RLE_CLR_BIT( hdr, i );
    }
    RLE_CLR_BIT( hdr, RLE_ALPHA );
    hdr.xmax -= hdr.xmin;
    hdr.xmin = 0;
    nrow = hdr.xmax + 1;
    nscan = (hdr.ymax - hdr.ymin + 1);
    buffer = (unsigned char *)malloc( nrow );
    scan = (unsigned char **) malloc( hdr.ncolors * 
                      sizeof( unsigned char * ) );
    for ( i = 0; i < hdr.ncolors; i++ )
    scan[i] = (unsigned char *)malloc( nrow );
    for ( ; i < 3; i++ )
    scan[i] = scan[i-1];

    if ( asciistr == NULL ) {
    asciistr = (char *) malloc( 1 + strlen( default_asciistr ) );
    strcpy(asciistr, default_asciistr);
    }
    numchars = strlen(asciistr);

    /* Read .rle file, dumping ascii as we go. */

    for (row=0; (row<nscan); row++)
    {
    if (hdr.ncolors > 1) {
        rle_getrow( &hdr, scan );
        rgb_to_bw( scan[0], scan[1], scan[2], buffer, nrow );
    }
    else {
        rle_getrow( &hdr, &buffer );
    }
    for (i=0; i < nrow; i++) {
        index = ((int)(buffer[i]) * numchars) >> 8;
        if (rflag)
        putchar(asciistr[numchars - (index + 1)]);
        else
        putchar(asciistr[index]);
    }
    printf("\n");
    }
}

Variable Documentation

char default_asciistr[] = "@BR*#$PX0woIcv:+!~\"., "

static

Definition at line 60 of file rletoascii.c.