Class: HexaPDF::Type::CIDFont

Inherits:
Font show all
Defined in:
lib/hexapdf/type/cid_font.rb

Overview

Represents a generic CIDFont which can only be used as a descendant font of a composite PDF font.

See: PDF2.0 s9.7.4

Defined Under Namespace

Classes: CIDSystemInfo

Constant Summary collapse

DEFAULT_WIDTH =

:nodoc:

1000

Constants included from DictionaryFields

DictionaryFields::Boolean, DictionaryFields::PDFByteString, DictionaryFields::PDFDate

Instance Attribute Summary

Attributes inherited from Object

#data, #document, #must_be_indirect

Instance Method Summary collapse

Methods inherited from Font

#bounding_box, #embedded?, #font_file, #font_wrapper, #font_wrapper=, #glyph_scaling_factor, #must_be_indirect?, #to_utf8

Methods inherited from Dictionary

#[], #[]=, define_field, define_type, #delete, #each, each_field, #empty?, field, #key?, #to_hash, type, #type

Methods inherited from Object

#<=>, #==, #cache, #cached?, #clear_cache, deep_copy, #deep_copy, #document?, #eql?, field, #gen, #gen=, #hash, #indirect?, #initialize, #inspect, make_direct, #must_be_indirect?, #null?, #oid, #oid=, #type, #validate, #value, #value=

Constructor Details

This class inherits a constructor from HexaPDF::Object

Instance Method Details

#set_widths(widths, default_width: DEFAULT_WIDTH) ⇒ Object

Sets the /W and /DW keys using the given array of [CID, width] pairs and an optional default width.

See: PDF2.0 s9.7.4.3



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# File 'lib/hexapdf/type/cid_font.rb', line 87

def set_widths(widths, default_width: DEFAULT_WIDTH)
  if widths.empty?
    (default_width == DEFAULT_WIDTH ? delete(:DW) : self[:DW] = default_width)
    delete(:W)
  else
    self[:DW] = default_width.to_i unless default_width == DEFAULT_WIDTH
    self[:W] = w = []
    last_cid = -10
    cur_widths = nil
    widths.each do |cid, width|
      if last_cid + 1 != cid
        cur_widths = []
        w << cid << cur_widths
      end
      cur_widths << width.to_i
      last_cid = cid
    end
  end
end

#width(cid) ⇒ Object

Returns the unscaled width of the given CID in glyph units, or 0 if the width for the CID is missing.

Note that in contrast to other fonts, the argument must not be a code point but a CID!



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# File 'lib/hexapdf/type/cid_font.rb', line 79

def width(cid)
  widths[cid] || value[:DW] || DEFAULT_WIDTH
end