para

#| /Identity-H or /Identity-V encoded fonts
use PDF::Font::Loader::Enc;
class PDF::Font::Loader::Enc::Identity16
    is PDF::Font::Loader::Enc {

    use Font::FreeType::Face;
    use Font::FreeType::Raw;
    use Font::FreeType::Raw::Defs;
    use PDF::COS;
    use PDF::IO::Util :&pack;

    has Font::FreeType::Face $.face is required;
    has uint32 @!to-unicode;
    has UInt %.charset{UInt};
    has UInt $.min-index;
    has UInt $.max-index;
    has atomicint $!init = 0;

    method is-wide {True}

    multi method encode(Str $text, :cids($)!) {
        my $face-struct = $!face.raw;
        $.lock.protect: {
            blob16.new: $text.ords.map: -> $ord {
                my uint $cid = $face-struct.FT_Get_Char_Index($ord);
                @!to-unicode[$cid] ||= $ord;
                %!charset{$ord} ||= $cid;
                $cid;
            }
        }
    }

    multi method encode(Str $text --> Str) {
        my blob8 $buf := pack(self.encode($text, :cids), 16);
        my $hex-string = $buf.decode: 'latin-1';
        PDF::COS.coerce: :$hex-string;
    }

    method !setup-decoding {
        $.lock.protect: {
            unless $!init {
                my FT_Face $struct = $!face.raw;
                my FT_UInt $glyph-idx;
                my FT_ULong $char-code = $struct.FT_Get_First_Char( $glyph-idx);
                @!to-unicode[$!face.num-glyphs] = 0;
                while $glyph-idx {
                    @!to-unicode[ $glyph-idx ] = $char-code;
                    $char-code = $struct.FT_Get_Next_Char( $char-code, $glyph-idx);
                }
                $!init ⚛= 1;
            }
        }
    }

    method to-unicode {
        $!init || self!setup-decoding();
        @!to-unicode;
    }

    multi method decode(Str $encoded, :cids($)!) {
        $encoded.ords.map: -> \hi, \lo {hi +< 8 + lo};
    }

    multi method decode(Str $encoded, :ords($)!) {
        my @to-unicode := self.to-unicode;
        $.lock.protect: {self.decode($encoded, :cids).map({@to-unicode[$_] || Empty})};
    }

    multi method decode(Str $encoded --> Str) {
        $.decode($encoded, :ords)».chr.join;
    }
}



head

This class implements`Identity-H` and `Identity-V` encoding.


This is common 2 byte encoding that directly encodes font glyph identifiers as
CIDs. It was introduced with PDF 1.3.


root

Type1

CMap

React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=end React


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
This website uses cookies for analytics.
=end React


Identity16

Description

PDF::Font::Loader v0.7.5

Authors

License

Dependencies

Test Dependencies

Provides

Documentation