Returns a uni-font object.

FONTSPECS: fonts can be registered using the following hash-ref:

{
    font   => $fontobj,     # the font to be registered
    blocks => $blockspec,   # the unicode blocks, the font is being registered for
    codes  => $codespec,    # the unicode codepoints, -"-
}

BLOCKSPECS:

[
    $block1, $block3,    # register font for block 1 + 3
    [$blockA,$blockZ],   # register font for blocks A .. Z
]

CODESPECS:

[
    $cp1, $cp3,          # register font for codepoint 1 + 3
    [$cpA,$cpZ],         # register font for codepoints A .. Z
]

NOTE: if you want to register a font for the entire unicode space (ie. U+0000 .. U+FFFF), then simply specify a font-object without the hash-ref.

Valid %options are:

'-encode' ... changes the encoding of the font from its default.
  (see "perldoc Encode" for a list of valid tags)

Returns a uni-font object. This method is different from 'new' that it needs an PDF::API3::Compat::API2-object rather than a Text::PDF::File-object.