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|
#!@PERL_PATH@
# Original by Stig S. Bakken <ssb@guardian.no>
# Modified by Tin Le <tin@netimages.com>
# $Date: 1998/03/02 01:33:11 $
use Getopt::Std;
$opt_debug = 1;
getopts('bd:');
if (!@ARGV || $opt_err) {
print "\nUsage: $0 [-b] [-d n] bdf_file [>gd_file]\n";
print "-d n Debugging level n\n";
print "-b Put fonts on a common baseline instead of common topline\n\n";
print "bdf2gdfont converts X11 bdf files to GD font format files\n";
exit 1;
}
if (($file = shift) && open(BDF, $file)) {
bdf_to_gdfont(BDF, STDOUT) || exit 1;
}
close(BDF);
sub bdf_to_gdfont
{
my $bdf_file = shift;
my $gd_file = shift;
my($width, $height, $nchars, $glyphname, $charline, $code);
my($lines_left, @lines, $rasterline, $rec, $ind, $char, $data);
my($rline, $last, $first, $nbytes);
$format = <$bdf_file>;
if ($format !~ /^STARTFONT 2\.1/) {
chop;
print STDERR "Unknown font format ($_)\n";
return undef;
}
$nbytes = $width = $height = 0;
while (<$bdf_file>) {
chop;
next if /^\s*COMMENT/;
if (/^FONTBOUNDINGBOX (\d+) (\d+)/) {
($width, $height) = ($1, $2);
} elsif (/^\s*CHARS (\d+)/) {
$nchars = $1;
} elsif (/^\s*STARTCHAR (.*)/) {
$glyphname = $1;
print STDERR "reading $1...\n" if ($opt_debug > 8);
while ($charline = <$bdf_file>) {
chop $charline;
print STDERR "got line \"$charline\"...\n" if ($opt_debug > 8);
if ($charline =~ /^\s*ENCODING (\d+)/) {
$nbytes++; # keep track of bytes in font
$code = $1;
$last = $code if ($code > $last);
} elsif ($charline =~ /^\s*BITMAP/) {
$lines_left = $height;
@lines = ();
while ($lines_left > 0) {
chop($rasterline = <$bdf_file>);
if ($rasterline =~ /^\s*ENDCHAR/) {
$charline = $rasterline;
last;
}
# remove leading & ending white spaces
$rasterline =~ s/\s+$//;
$rasterline =~ s/^\s+//;
foreach $rec (split(/\s+/, $rasterline)) {
$lines_left--;
push(@lines, $rec);
}
}
# align font to common baseline
@temp = ();
while ($lines_left > 0) {
push(@temp, '00');
$lines_left--;
}
# baseline from bottom
if ($opt_b) {
@lines = (@temp, @lines);
} else { # or from top
@lines = (@lines, @temp);
}
}
last if ($charline =~ /^\s*ENDCHAR/);
}
$ind = int($code);
$character_data{$ind} = join(' ', @lines);
}
}
# find the first char
$first = $last;
while (($k, $v) = each %character_data) {
$first = $k if ($k < $first);
}
# GD fonts are limited to 255 char encoding
if ($last > 255) {
$last = 255;
}
binmode STDOUT;
$tmp = $width / 8;
$tmp++ if (int($tmp) < $tmp);
$bytes = int($tmp); # simulates ceil()
$addnulls = '0' x $bytes;
$bytes_written = 0;
$numchars = ($last - $first) + 1;
@empty_data = ();
for ($i = 0; $i < $height; $i++) {
push(@empty_data, $addnulls);
}
print STDERR "bytes=$bytes, tmp=$tmp\n" if ($opt_debug > 5);
print STDERR "nchars=$numchars($nbytes) offset=$first width=$width height=$height\n";
print STDERR "should become ", (16+($numchars*$width*$height)), " bytes\n";
$nbytes = 16+($numchars*$width*$height);
print pack("i4", $numchars, $first, $width, $height);
$bytes_written += 16;
for ($char = $first; $char <= $last; $char++) {
print STDERR "char $char:\n" if ($opt_debug>9);
if ($character_data{$char}) {
@data = split(' ', $character_data{$char});
} else {
print STDERR "[empty] " if ($opt_debug>9);
@data = @empty_data;
}
foreach $rline (@data) {
$rline .= $addnulls;
for ($bitsleft = $width, $i = 0; $i < $bytes && $bitsleft > 0;
$i++)
{
$byte = hex(substr($rline, ($i*2), 2));
printf STDERR "%-2x ", $byte if ($opt_debug>5);
for ($mask = 128; $mask > 0 && $bitsleft > 0;
$mask >>= 1, $bitsleft--)
{
if ($byte & $mask) {
print pack("C", 1);
} else {
print pack("C", 0);
}
$bytes_written += 1;
}
print STDERR "\n" if ($opt_debug>5);
}
}
}
1;
}
|
