File Coverage

blib/lib/Font/BDF/Reader.pm

Criterion	Covered	Total	%
statement	15	105	14.2
branch	0	20	0.0
condition	0	18	0.0
subroutine	5	19	26.3
pod	14	14	100.0
total	34	176	19.3

package Font::BDF::Reader;

use 5.008;
use strict;
use warnings;

use IO::File;
use Data::Dumper;

require Exporter;

our @ISA = qw(Exporter);

# Items to export into callers namespace by default. Note: do not export
# names by default without a very good reason. Use EXPORT_OK instead.
# Do not simply export all your public functions/methods/constants.

# This allows declaration	use Font::BDF::Reader ':all';
# If you do not need this, moving things directly into @EXPORT or @EXPORT_OK
# will save memory.
our %EXPORT_TAGS = ( 'all' => [ qw(
) ] );

our @EXPORT_OK = ( @{ $EXPORT_TAGS{'all'} } );

our @EXPORT = qw(
);

our $VERSION = '0.01';

# Preloaded methods go here.

sub new {
  my $type	= shift;
  my $self	= { STARTCHAR	=> {},
		    ENCODING	=> {},
		  };

  bless $self, $type;

  my $bdf_file	= shift || "";
  if( $bdf_file ) {
    if( $self->open_bdf_file( $bdf_file ) ) {
      $self->read_bdf_file;
    }
  }
  return $self;
}

sub get_all_STARTCHAR {
  my $self		= shift;

  return sort keys %{$self->{STARTCHAR}};
}

sub get_all_ENCODING {
  my $self		= shift;

  return sort keys %{$self->{ENCODING}};
}

sub get_font_info_by_STARTCHAR {
  my $self		= shift;
  my $key		= shift;

  return $self->{STARTCHAR}{$key};
}

sub get_font_info_by_ENCODING {
  my $self		= shift;
  my $key		= shift;

  return $self->{ENCODING}{$key};
}

sub clear_cache {
  my $self		= shift;
  $self->{ENCODING}	= {};
  $self->{STARTCHAR}	= {};
}

sub clear_font_info_by_STARTCHAR {
  my $self		= shift;
  my $key		= shift;
  delete $self->{STARTCHAR}{$key};
}

sub clear_font_info_by_ENCODING {
  my $self		= shift;
  my $key		= shift;
  delete $self->{ENCODING}{$key};
}

sub open_bdf_file {
  my $self		= shift;
  my $bdf_file		= shift || die "No bdf file specified!";
  if( ! -f $bdf_file ) {
    die "bdf file '$bdf_file' not found!";
  }
  $self->{BDF_FILE}	= $bdf_file;
  my $FH		= IO::File->new( $bdf_file )
    || die "Can't open bdf file '$bdf_file'!";
  $self->{FH}		= $FH;

  return $self;
}

sub read_bdf_file {
  my $self		= shift;
  $self->read_bdf_metadata( @_ );

  $self->read_bdf_chars( @_ );
}

sub read_bdf_metadata {
  my $self		= shift;
  my $FH		= shift || $self->{FH} || die "No FH!";

  # Read in the metadata
  my $last_line		= "";
  my %METADATA	= ();
  while( <$FH> ) {
    chomp; chomp;
    my( $key, $val )	= split /\s+/, $_, 2;
    $METADATA{$key}	= $val;
    if( $key =~ /^CHARS$/i ) {
      $self->{METADATA}	= \%METADATA;
      last;
    }
  }
}

sub get_bdf_metadata {
  my $self		= shift;

  return $self->{METADATA};
}


sub read_bdf_chars {
  my $self		= shift;
  my $FH		= shift || $self->{FH} || die "No FH!";

  my $chars		= $self->{METADATA}{CHARS};
  my $chars_read	= 0;
  while( $self->read_bdf_char ) {
    $chars_read++;
  }

  if( $chars_read != $chars ) {
    warn "Chars read is $chars_read, expected $chars.\n";
  }
  return $self;
}


sub read_bdf_char {
  my $self		= shift;
  my $FH		= shift || $self->{FH} || die "No FH!";

  # Now, read in the character data:
  # STARTCHAR 7f56
  # ENCODING 32598
  # SWIDTH 150 0
  # DWIDTH 48 0
  # BBX 48 48 0 -2
  # BITMAP
  # 000000000000
  # ...
  # ENDCHAR

  my %char_data		= ();
  while( <$FH> ) {
    chomp; chomp;
    return 0	if( /ENDFONT/ or /^$/ );
    if( /^BITMAP/ ) {
      # Read the bitmap data
      my @bitmap_data	= ();
      while( <$FH> ) {
	chomp; chomp;
	last		if( /^ENDCHAR/ );
	push @bitmap_data, $_;			# Otherwise, store the line of data
      }
      $char_data{BITMAP}	= \@bitmap_data;
      last;
    }
    last		if( /^ENDCHAR/ );

    # Read metadata
    my($key,$val)	= split /\s+/, $_, 2;
    if( $key eq "STARTCHAR" or $val eq "ENCODING" ) {
      $char_data{$key}	= $val;
    }
    else {
      my @array_data	= split /\s+/, $val;
      $char_data{$key}	= \@array_data;
    }
  }
#  print Dumper( \%char_data );
  my $STARTCHAR	= $char_data{STARTCHAR};
  my $ENCODING	= $char_data{ENCODING};
  $self->{STARTCHAR}{$STARTCHAR}	= \%char_data;
  $self->{ENCODING}{$ENCODING}		= \%char_data;

  return $char_data{STARTCHAR};
}

1;
__END__