Class: Pdfrb::Model::Type::Indexed

Inherits:
Cos::Stream show all
Defined in:
lib/pdfrb/model/type/indexed.rb

Overview

Indexed color space array wrapper. The /Indexed color space is [/Indexed base hival lookup]; the lookup table is the stream payload or a string.

Instance Attribute Summary

Attributes inherited from Cos::Stream

#stream

Attributes inherited from Object

#document, #gen, #oid, #value

Instance Method Summary collapse

Methods inherited from Cos::Stream

#decoded_stream, #encoded_stream=, #initialize

Methods inherited from Cos::Dictionary

#[], #[]=, arlington_available?, arlington_default, arlington_key_to_symbol, arlington_loaded_for?, arlington_mark_loaded, arlington_object, arlington_one_type_to_ruby, arlington_required?, arlington_types_to_ruby, arlington_version, define_field, define_field_from_arlington, #delete, #each, each_field, #each_raw, #empty?, field, #initialize, #key?, #keys, lookup_type, own_fields, #pdf_type, register_type, type_map, #validate

Methods inherited from Object

#==, define_type, #deref, #indirect?, #initialize, #must_be_indirect?, #pdf_type, pdf_type

Constructor Details

This class inherits a constructor from Pdfrb::Model::Cos::Stream

Instance Method Details

#base_color_space ⇒ Object 



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# File 'lib/pdfrb/model/type/indexed.rb', line 10

def base_color_space; self[:Base]; end

#components ⇒ Object 



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# File 'lib/pdfrb/model/type/indexed.rb', line 14

def components
  return nil unless base_color_space

  case base_color_space.to_sym
  when :DeviceGray, :CalGray then 1
  when :DeviceRGB, :CalRGB then 3
  when :DeviceCMYK then 4
  end
rescue StandardError
  nil
end

#hival ⇒ Object 



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# File 'lib/pdfrb/model/type/indexed.rb', line 11

def hival; self[:Hival]; end

#lookup ⇒ Object 



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# File 'lib/pdfrb/model/type/indexed.rb', line 12

def lookup; self[:Lookup]; end

#palette_entries ⇒ Object 



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# File 'lib/pdfrb/model/type/indexed.rb', line 26

def palette_entries
  (hival || -1) + 1
end