X-Git-Url: http://git.shiar.net/wormy.git/blobdiff_plain/580332877fa744e0653d74d92dc29346b9245093..6d64bb2aa29809c9c24fb5ee036766440b62bf4a:/lib/Games/Wormy/TICalcLevels.pm diff --git a/lib/Games/Wormy/TICalcLevels.pm b/lib/Games/Wormy/TICalcLevels.pm new file mode 100644 index 0000000..82ae3de --- /dev/null +++ b/lib/Games/Wormy/TICalcLevels.pm @@ -0,0 +1,266 @@ +package Games::Wormy::TICalcLevels; + +use 5.010; +use strict; +use warnings; + +use List::Util qw(sum min max); +use Data::Dumper; +use Parse::Binary::Nested qw(unpackf); + +our $VERSION = '1.00'; + +sub read { + my ($self, $input, $override) = @_; + my ($psize, $ptype, $size, $type, $vsize, $dsize, $id, $version) = unpack q{ + x11 x42 # file signature and comment + S a2 S a2 # file size, type; data size, type + x8 # var name + S S # var size; content size + CC # wormy header + }, $input; + $ptype eq "\014\000" + or die "Not a calculator string, thus cannot be a Wormy level file\n"; + $size == $psize - 16 + or warn "File size ($size) does not correspond with data size ($psize)\n"; + $type eq "\014\010" + or die "Not a calculator string, thus cannot be a Wormy level file\n"; + $size == $vsize and $vsize == $dsize+2 + or warn "Mismatch in string data size declarations\n"; +# substr($input, -2) eq $CHECKSUM + + $input = substr $input, 73, -2; + $id eq ord 'w' + or die "Wormy level identifier not found\n"; + + if ($override) { + warn "Override version $version to $override\n"; + $version = $override; + } + elsif ($version == 95) { + # level offset instead of description byte + $version-- if (unpack('x2Z*x2xC', $input))[1] == 0xF4; + warn "Ambiguous file version 95; guessing subversion $version\n"; + } + + my @FORMAT = ( + magic => 'a1', + version => 'C', + name => 'Z*', + description => 'Z*', + levelcount => [1, + total => 'S', + ], + moderef => [1, + map { ( + offset => [1, map {$_ => 'S'} @$_], # byte location of start + end => [1, map {$_ => 'C'} @$_], + ) } + [qw/single peaworm tron deathmatch foodmatch multifood timematch race ctf/] + ], + theanswer => 'x', # 42 + sprite => ['C', + line => 'B8', + ], + leveldata => 'a*', + #levels + #finish code + #levels-multi + #hinames + ); + my @LEVELFORM = ( + peas => 'C', + delay => 'C', + growth => 'C', + bsize => 'C', + sprite => ['C', + line => 'B8', + ], + balls => ['C', + y => 'C', + x => 'C', + dir => 'C', + ], + worms => [1, + d => 'C', + y => 'C', + x => 'C', + ], + width => 'C', + height => 'C', + flags => [0, + y => 'C', + x => 'C', + ], + objects => ['?0', + type => 'C', + x1 => 'C', + y1 => 'C', + x2 => 'C', + y2 => 'C', + ], + ); + my $offsetbase = 0xF080; + + my @VARMODES = ( + [qw'single single'], + [qw'multi peaworm tron deathmatch foodmatch multifood timematch'], + [qw'race race'], + [qw'ctf ctf'], + ); + + given ($version) { + when (97) { + # current @FORMAT + } + $offsetbase = 0xF400; + when (96) {} + ref $_ and splice(@$_, -8, 2) for @{ $FORMAT[11] }; # no multifood + splice @FORMAT, 12, 2; # no reserved byte + when (95) {} + splice @FORMAT, 6, 2; # no description + when (94) {} + when (90) { + $FORMAT[5] = 'C/a'; # length-preceding name + splice @FORMAT, 10, 2; # no default sprite + ref $_ and do { + $_->[5] = $_->[7]; # no tron; deathmatch instead + $_->[7] = $_->[9]; # foodmatch instead + $_->[9] = 'linkmatch'; # replaces timematch + $_->[11] = $_->[13]; # race + $_->[13] = $_->[15]; # ctf + $_->[15] = 'domination'; + } for @{ $FORMAT[9] }; # no multifood + splice @LEVELFORM, -2; + push @LEVELFORM, "objects$_" => ['C', + type => "=$_", + map {$_ => 'C'} qw(x1 y1 x2 y2) + ] for 2, 3; + # peaworm/tron mode do not take multiplayer levels + splice @VARMODES, 1, 0, ['peaworm', splice @{ $VARMODES[1] }, 1, 2]; + } + default { + die "Unsupported level version $version\n"; + } + } + + my $data = unpackf(\@FORMAT, $input); + my $offset = 0; + $offsetbase += 1 + @{ $data->{sprite} } if $data->{sprite}; + $data->{moderef}->{offset}->{single} == $offsetbase + or warn "First singleplayer level is not in front\n"; + + my $slots = sum(grep {defined} + $data->{moderef}->{end}->{single} > 0, # singleplayer slot if any levels + $data->{moderef}->{end}->{peaworm}, # one for each peaworm arena + $data->{moderef}->{end}->{tron}, # idem for tron + ); + $data->{hinames} = [ unpack '(x2a3)*', substr($data->{leveldata}, -5 * $slots) ]; + $data->{format} = '86s'; + + $data->{levels} = []; + for my $modes (@VARMODES) { + my $variant = shift @$modes; + my @modeoffsets = grep {defined} #TODO: comment + map { $data->{moderef}->{offset}->{$_} } @$modes; + @modeoffsets or next; + $data->{levelcount}->{$variant} = 0; + $offset = min(grep {$_} @modeoffsets) or next; + $offset -= $offsetbase; + my $amount = $variant eq 'single' ? 100 + : max(grep {defined} map { $data->{moderef}->{end}->{$_} } @$modes); + + my @varform = @LEVELFORM; + $varform[13]->[0] = $variant ~~ ['single', 'peaworm'] ? 1 : 4; # worms + unshift @varform, name => 'Z*' unless $variant eq 'single' or $version <= 91; + $varform[-3]->[0] = 1 if $variant eq 'race' and $version > 91; + $varform[-3]->[0] = 2 if $variant eq 'ctf'; + push @varform, size => '=.'; + my $parselevel = Parse::Binary::Nested->new(\@varform); + + while ($offset < length $data->{leveldata}) { + last if substr($data->{leveldata}, $offset, 1) eq chr(255); + + # find references to this level offset, and set start number to matching modes + while (my ($mode, $location) = each %{ $data->{moderef}->{offset} }) { + $location == $offset + $offsetbase or next; + $data->{moderef}->{start}->{$mode} = 1 + scalar @{ $data->{levels} }; + } + + my $level = $parselevel->unpackf(substr $data->{leveldata}, $offset); + $level->{offset} = $offset + $offsetbase; + + # add objects until terminator + $level->{objects} = []; + if ($version <= 91) { + ref $_ eq 'ARRAY' and push @{ $level->{objects} }, @$_ + for map { delete $level->{"objects$_"} } 2, 3; + } + + # add parsed level and advance + push @{ $data->{levels} }, $level; + $offset += $level->{size}; + last if ++$data->{levelcount}->{$variant} >= $amount; + } + + if ($variant eq 'single') { + $offset++; + $data->{finish}->{code} = + my $code = substr $data->{leveldata}, $offset, -5*$slots; + + my %FINISHCODE = ( + 0 => chr 0xC9, # ret + 1 => join('', + chr 0x21, # ld hl, MESSAGE + pack('v', $offsetbase + $offset + 9), + (map {chr} + 0xCD, 0x37, 0x4A, # call _puts + 0xC3, 0xAA, 0x55, # jp _getkey + ), + ), + 2 => join('', + (map {chr} + 0x21, 0, 0x1C, # ld hl, $POS + 0x22, 0x7C, 0xC3, # ld (_penCol), hl + 0x21, # ld hl, MESSAGE + ), + pack('v', $offsetbase + $offset + 15), + (map {chr} + 0xCD, 0xA5, 0x4A, # call _vputs + 0xC3, 0xAA, 0x55, # jp _getkey + ), + ), + ); + while (my ($finish, $match) = each %FINISHCODE) { + $match eq substr $code, 0, length $match or next; + $data->{finish}->{type} = $finish and + $data->{finish}->{message} = unpack 'Z*', substr($code, length $match); + last; + } + } + } + + return $data; +} + +1; + +__END__ + +=head1 NAME + +Games::Wormy::TICalcLevels - Read Wormy levelset from a compiled TI-86 file + +=head1 SYNOPSIS + + my $levelset = Games::Wormy::TICalcLevels->read($filecontents); + print $levelset->{name}; + +=head1 AUTHOR + +Mischa POSLAWSKY + +=head1 LICENSE + +LGPL version 3. +