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package Image::TextMode::Format::XBin; |
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4219
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use Moose; |
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# Flag byte constants |
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my $FLAG_PALETTE = 1; |
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my $FLAG_FONT = 2; |
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my $FLAG_COMPRESSED = 4; |
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my $FLAG_NON_BLINK = 8; |
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my $FLAG_FIVETWELVE_CHARS = 16; |
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extends 'Image::TextMode::Format', 'Image::TextMode::Canvas'; |
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has 'header' => ( |
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is => 'rw', |
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isa => 'HashRef', |
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default => sub { |
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{ id => 'XBIN', |
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eofchar => chr( 26 ), |
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map { $_ => 0 } qw( width height fontsize flags ) |
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}; |
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} |
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); |
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sub has_palette { |
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shift->header->{ flags } & $FLAG_PALETTE; |
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} |
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sub has_font { |
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shift->header->{ flags } & $FLAG_FONT; |
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} |
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sub is_compressed { |
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shift->header->{ flags } & $FLAG_COMPRESSED; |
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} |
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sub is_non_blink { |
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shift->header->{ flags } & $FLAG_NON_BLINK; |
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} |
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sub has_fivetwelve_chars { |
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shift->header->{ flags } & $FLAG_FIVETWELVE_CHARS; |
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} |
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sub extensions { return 'xb', 'xbin' } |
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no Moose; |
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__PACKAGE__->meta->make_immutable; |
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=head1 NAME |
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Image::TextMode::Format::XBin - read and write XBin files |
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=head1 DESCRIPTION |
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XBin stands for "eXtended BIN" -- an extention to the normal raw-image BIN files. |
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XBin features: |
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=over 4 |
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=item * allows for binary images up to 65536 columns wide, and 65536 lines high |
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=item * can have an alternate set of palette colors either in blink or in non-blink mode |
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=item * can have different textmode fonts from 1 to 32 scanlines high, consisting of either 256 or 512 different characters |
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=item * can be compressed |
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=back |
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XBin file stucture: |
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+------------+ |
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| Header | |
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+------------+ |
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| Palette | |
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+------------+ |
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| Font | |
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+------------+ |
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| Image Data | |
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+------------+ |
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Note, the only required element is a header. See the XBin specs for for information. |
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http://www.acid.org/info/xbin/xbin.htm |
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=head1 ACCESSORS |
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=over 4 |
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=item * header - A header hashref containing an id, width, height, font size and any extra flags |
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=back |
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=head1 METHODS |
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=head2 new( %args ) |
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Creates a XBin instance. |
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=head2 has_palette( ) |
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Retrieves palette status from the flag byte in the header. |
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=head2 has_font( ) |
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Retrieves font status from the flag byte in the header. |
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=head2 is_compressed( ) |
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Retrieves compressed status from the flag byte in the header. |
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=head2 is_non_blink( ) |
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Retrieves non-blink status from the flag byte in the header. |
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=head2 has_fivetwelve_chars( ) |
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Retrieves 512 character font status from the flag byte in the header. |
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=head2 extensions( ) |
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Returns 'xb', 'xbin'. |
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=head1 AUTHOR |
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Brian Cassidy E<lt>bricas@cpan.orgE<gt> |
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=head1 COPYRIGHT AND LICENSE |
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Copyright 2008-2013 by Brian Cassidy |
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This library is free software; you can redistribute it and/or modify |
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it under the same terms as Perl itself. |
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=cut |
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1; |