mirror of https://github.com/mi57730/a2d.git
69 lines
1.4 KiB
Perl
Executable File
69 lines
1.4 KiB
Perl
Executable File
#!/usr/bin/env perl
|
|
|
|
# Input: HCRG-style Font (768 bytes)
|
|
# Output: MGTK font definition
|
|
|
|
# Usage: perl convert.pl < font_data > font.bin
|
|
|
|
use strict;
|
|
use warnings;
|
|
$SIG{__WARN__} = sub { die @_ };
|
|
|
|
my @chars;
|
|
my $NCCS = 32;
|
|
my $NCHARS = 128;
|
|
|
|
# Fill in control characters
|
|
for (my $i = 0; $i < $NCCS; ++$i) {
|
|
$chars[$i] = "\x00" x 8;
|
|
}
|
|
|
|
for (my $i = 0; $i < $NCHARS - $NCCS; ++$i) {
|
|
read(STDIN, $chars[$i + $NCCS], 8);
|
|
}
|
|
|
|
my @out;
|
|
|
|
push @out, 0x00; # single width
|
|
push @out, 0x7f; # last character
|
|
push @out, 8; # height
|
|
|
|
# compute glyph widths
|
|
for (my $i = 0; $i < $NCHARS; ++$i) {
|
|
|
|
my @bytes = map { ord($_) & 0x7f } split('', $chars[$i]);
|
|
|
|
my $bits = 0;
|
|
for (my $b = 0; $b < 8; ++$b) {
|
|
$bits = $bits | $bytes[$b];
|
|
}
|
|
|
|
$chars[$i] = join('', map { chr } @bytes);
|
|
|
|
my $w =
|
|
$bits >= (1<<6) ? 7 :
|
|
$bits >= (1<<5) ? 6 :
|
|
$bits >= (1<<4) ? 5 :
|
|
$bits >= (1<<3) ? 4 :
|
|
$bits >= (1<<2) ? 3 :
|
|
$bits >= (1<<1) ? 2 : 1;
|
|
|
|
push @out, $w;
|
|
}
|
|
|
|
# bits
|
|
for (my $b = 0; $b < 8; ++$b) {
|
|
for (my $i = 0; $i < $NCHARS; ++$i) {
|
|
push @out, ord(substr($chars[$i], $b, 1));
|
|
}
|
|
}
|
|
|
|
# source output for ca65
|
|
#while (scalar @out) {
|
|
# my @chunk = splice(@out, 0, 8);
|
|
# @chunk = map { sprintf('$%02x', $_) } @chunk;
|
|
# print " .byte " . join(',', @chunk) . "\n";
|
|
#}
|
|
|
|
print join('', map { chr($_) } @out);
|