module HexaPDF::FontLoader::FromConfiguration

Returns a hash of the form 'font_name => [variants, ...]' of the configured fonts.

def self.available_fonts(document)
  document.config['font.map'].transform_values(&:keys)
end

This method uses the FromFile font loader behind the scenes.

Specifies whether the font should be subset if possible.
+subset+::

The font variant. Normally one of :none, :bold, :italic, :bold_italic.
+variant+::

The name of the font.
+name+::

The PDF document to associate the font wrapper with.
+document+::

the caller once the font is not needed anymore.
The file object representing the font file is *not* closed and if needed must be closed by

'font.map' configuration option.
Returns a TrueType font wrapper for the given font by looking up the needed file in the

def self.call(document, name, variant: :none, subset: true)
  file = document.config['font.map'].dig(name, variant)
  return nil if file.nil?
  unless file.kind_of?(HexaPDF::Font::TrueType::Font) || File.file?(file)
    raise HexaPDF::Error, "The configured font file #{file} is not a valid value"
  end
  FromFile.call(document, file, subset: subset)
end