dejavu-fonts/merge.pl

   1 #!/usr/bin/perl -w
   2
   3 # $Id$
   4
   5 # SFD files merger
   6 # (c)2005 Stepan Roh
   7 # usage: ./merge.pl sfd_from sfd_to sfd_out
   8 #  will merge sfd_to with sfd_from into the sfd_out (if there are some merges)
   9 #  will print merged glyph codes on stdout
  10
  11 # SFD = ( 'header' => @header_lines, 'footer' => @footer_lines, 'glyphs' => ( glyphenc => @glyph_lines ) )
  12
  13 sub load_sfd ($) {
  14   my ($sfdfile) = @_;
  15
  16   my %sfd = ();
  17   open (SFD, $sfdfile) || die "Unable to open $sfdfile : $!\n";
  18   # -1 = header, 0 = glyphs, 1 = footer
  19   my $section = -1;
  20   my $enc = 0;
  21   my @cur = ();
  22   while (<SFD>) {
  23     if (/^StartChar:/) {
  24       $section = 0;
  25     } elsif (/^Encoding:\s*(\d+)/) {
  26       $enc = $1;
  27     }
  28     if ($section == -1) {
  29       push (@{$sfd{'header'}}, $_);
  30     } elsif ($section == 1) {
  31       push (@{$sfd{'footer'}}, $_);
  32     } else {
  33       push (@cur, $_);
  34     }
  35     if (/^EndChar\s*$/) {
  36       $section = 1;
  37       @{$sfd{'glyphs'}{$enc}} = @cur;
  38       @cur = ();
  39     }
  40   }
  41   close (SFD);
  42
  43   return %sfd;
  44 }
  45
  46 sub save_sfd ($\%) {
  47   my ($sfdfile, $sfd_ref) = @_;
  48
  49   open (SFD, '>'.$sfdfile) || die "Unable to open $sfdfile : $!\n";
  50   print SFD @{$$sfd_ref{'header'}};
  51   foreach $enc (sort { $a <=> $b } keys %{$$sfd_ref{'glyphs'}}) {
  52     print SFD @{$$sfd_ref{'glyphs'}{$enc}};
  53   }
  54   print SFD @{$$sfd_ref{'footer'}};
  55   close (SFD);
  56 }
  57
  58 sub is_dummy_glyph (\@) {
  59   my ($glyph_ref) = @_;
  60
  61   foreach $l (@$glyph_ref) {
  62     if ($l =~ /^Colour:/) {
  63       # XXX this is quick'n'dirty hack to detect dummy glyphs
  64       return 1;
  65     }
  66   }
  67
  68   return 0;
  69 }
  70
  71 sub merge_glyphs (\%\%) {
  72   my ($sfd_from, $sfd_to) = @_;
  73
  74   my $merged = 0;
  75   foreach $enc (sort { $a <=> $b } keys %{$$sfd_from{'glyphs'}}) {
  76     if (!exists ($$sfd_to{'glyphs'}{$enc}) ||
  77         (!is_dummy_glyph(@{$$sfd_from{'glyphs'}{$enc}}) && is_dummy_glyph(@{$$sfd_to{'glyphs'}{$enc}}))) {
  78       $$sfd_to{'glyphs'}{$enc} = $$sfd_from{'glyphs'}{$enc};
  79       print $enc, "\n";
  80       $merged++;
  81     }
  82   }
  83
  84   return $merged;
  85 }
  86
  87 if (@ARGV < 3) {
  88   print STDERR "usage: $0 sfd_from sfd_to sfd_out\n";
  89   exit (1);
  90 }
  91
  92 ($sfdfile_from, $sfdfile_to, $sfdfile_out) = @ARGV;
  93
  94 %sfd_from = load_sfd ($sfdfile_from);
  95 %sfd_to = load_sfd ($sfdfile_to);
  96 if (merge_glyphs (%sfd_from, %sfd_to) > -1) {
  97   save_sfd ($sfdfile_out, %sfd_to);
  98 }
  99
 100 1;