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/* xbmtopbm.c - read an X bitmap file and produce a portable bitmap
**
** 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 "nstring.h"
#include "pbm.h"
#define TRUE 1
#define FALSE 0
static void ReadBitmapFile ARGS(( FILE* stream, int* widthP, int* heightP, char** dataP ));
int
main( argc, argv )
int argc;
char* argv[];
{
FILE* ifp;
bit* bitrow;
register bit* bP;
int rows, cols, row, col, charcount;
char* data;
char mask;
pbm_init( &argc, argv );
if ( argc > 2 )
pm_usage( "[bitmapfile]" );
if ( argc == 2 )
ifp = pm_openr( argv[1] );
else
ifp = stdin;
ReadBitmapFile( ifp, &cols, &rows, &data );
pm_close( ifp );
pbm_writepbminit( stdout, cols, rows, 0 );
bitrow = pbm_allocrow( cols );
for ( row = 0; row < rows; ++row )
{
charcount = 0;
mask = 1;
for ( col = 0, bP = bitrow; col < cols; ++col, ++bP )
{
if ( charcount >= 8 )
{
++data;
charcount = 0;
mask = 1;
}
*bP = ( *data & mask ) ? PBM_BLACK : PBM_WHITE;
++charcount;
mask = mask << 1;
}
++data;
pbm_writepbmrow( stdout, bitrow, cols, 0 );
}
pm_close( stdout );
exit( 0 );
}
#define MAX_LINE 500
static void
ReadBitmapFile( stream, widthP, heightP, dataP )
FILE* stream;
int* widthP;
int* heightP;
char** dataP;
{
char line[MAX_LINE], name_and_type[MAX_LINE];
char* ptr;
char* t;
int version10, raster_length, v;
register int bytes, bytes_per_line, padding;
register int c1, c2, value1, value2;
int hex_table[256];
int found_declaration;
/* In scanning through the bitmap file, we have found the first
line of the C declaration of the array (the "static char ..."
or whatever line)
*/
int eof;
/* We've encountered end of file while searching file */
*widthP = *heightP = -1;
found_declaration = FALSE; /* Haven't found it yet; haven't even looked*/
eof = FALSE; /* Haven't encountered end of file yet */
while (!found_declaration && !eof) {
if ( fgets( line, MAX_LINE, stream ) == NULL )
eof = TRUE;
else {
if ( strlen( line ) == MAX_LINE - 1 )
pm_error( "line too long" );
if ( sscanf( line, "#define %s %d", name_and_type, &v ) == 2 ) {
if ( ( t = strrchr( name_and_type, '_' ) ) == NULL )
t = name_and_type;
else
++t;
if ( STREQ( "width", t ) )
*widthP = v;
else if ( STREQ( "height", t ) )
*heightP = v;
continue;
}
if ( sscanf( line, "static short %s = {", name_and_type ) == 1 ) {
version10 = TRUE;
found_declaration = TRUE;
}
else if ( sscanf( line, "static char %s = {", name_and_type ) == 1 ) {
version10 = FALSE;
found_declaration = TRUE;
}
else if (sscanf(line,
"static unsigned char %s = {", name_and_type ) == 1 ) {
version10 = FALSE;
found_declaration = TRUE;
}
}
}
if (!found_declaration)
pm_error("Unable to find a line in the file containing the start "
"of C array declaration (\"static char\" or whatever)");
if ( *widthP == -1 )
pm_error( "invalid width" );
if ( *heightP == -1 )
pm_error( "invalid height" );
padding = 0;
if ( ((*widthP % 16) >= 1) && ((*widthP % 16) <= 8) && version10 )
padding = 1;
bytes_per_line = (*widthP+7)/8 + padding;
raster_length = bytes_per_line * *heightP;
*dataP = (char*) malloc( raster_length );
if ( *dataP == (char*) 0 )
pm_error( "out of memory" );
/* Initialize hex_table. */
for ( c1 = 0; c1 < 256; ++c1 )
hex_table[c1] = 256;
hex_table['0'] = 0;
hex_table['1'] = 1;
hex_table['2'] = 2;
hex_table['3'] = 3;
hex_table['4'] = 4;
hex_table['5'] = 5;
hex_table['6'] = 6;
hex_table['7'] = 7;
hex_table['8'] = 8;
hex_table['9'] = 9;
hex_table['A'] = 10;
hex_table['B'] = 11;
hex_table['C'] = 12;
hex_table['D'] = 13;
hex_table['E'] = 14;
hex_table['F'] = 15;
hex_table['a'] = 10;
hex_table['b'] = 11;
hex_table['c'] = 12;
hex_table['d'] = 13;
hex_table['e'] = 14;
hex_table['f'] = 15;
if ( version10 )
for ( bytes = 0, ptr = *dataP; bytes < raster_length; bytes += 2 ) {
while ( ( c1 = getc( stream ) ) != 'x' )
if ( c1 == EOF )
pm_error( "EOF / read error" );
c1 = getc( stream );
c2 = getc( stream );
if ( c1 == EOF || c2 == EOF )
pm_error( "EOF / read error" );
value1 = ( hex_table[c1] << 4 ) + hex_table[c2];
if ( value1 >= 256 )
pm_error( "syntax error" );
c1 = getc( stream );
c2 = getc( stream );
if ( c1 == EOF || c2 == EOF )
pm_error( "EOF / read error" );
value2 = ( hex_table[c1] << 4 ) + hex_table[c2];
if ( value2 >= 256 )
pm_error( "syntax error" );
*ptr++ = value2;
if ( ( ! padding ) || ( ( bytes + 2 ) % bytes_per_line ) )
*ptr++ = value1;
}
else
for ( bytes = 0, ptr = *dataP; bytes < raster_length; ++bytes ) {
/*
** Skip until digit is found.
*/
for ( ; ; )
{
c1 = getc( stream );
if ( c1 == EOF )
pm_error( "EOF / read error" );
value1 = hex_table[c1];
if ( value1 != 256 )
break;
}
/*
** Loop on digits.
*/
for ( ; ; ) {
c2 = getc( stream );
if ( c2 == EOF )
pm_error( "EOF / read error" );
value2 = hex_table[c2];
if ( value2 != 256 ) {
value1 = (value1 << 4) | value2;
if ( value1 >= 256 )
pm_error( "syntax error" );
}
else if ( c2 == 'x' || c2 == 'X' )
if ( value1 == 0 )
continue;
else pm_error( "syntax error" );
else break;
}
*ptr++ = value1;
}
}
/* CHANGE HISTORY:
99.09.08 bryanh Recognize "static unsigned char" declaration.
*/
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