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#!/usr/bin/env perl
use strict;
use warnings;
# PODNAME: pnm2chr
# ABSTRACT: converts PNM files to NES sprite data (.chr files)
use Games::NES::SpriteMaker 'image_to_sprite';
=head1 SYNOPSIS
pnm2chr input.pgm # generates input.chr
pnm2chr < input.pgm > output.chr
=head1 DESCRIPTION
This is a simple wrapper around L<Games::NES::SpriteMaker> to convert existing
files from PNM format to CHR-ROM format. If you pass a filename as an argument,
it will create a new file in the same directory with the same name except
replacing the extension with C<.chr>, otherwise it will read PNM data from
stdin and write CHR data to stdout.
=cut
my $data;
if (@ARGV) {
$data = $ARGV[0];
}
else {
$data = \(do { local $/; <> });
}
my $sprite_data = image_to_sprite($data);
if (@ARGV) {
(my $outfile = $data) =~ s/\..*$/.chr/;
open my $fh, '>', $outfile
or die "Couldn't open $outfile for writing: $!";
$fh->print($sprite_data);
$fh->close;
}
else {
print $sprite_data;
}
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