Class: Color::Gray

Inherits:
Base
  • Object
show all
Defined in:
lib/quadtone/color/gray.rb

Instance Attribute Summary

Attributes inherited from Base

#components

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Base

#<=>, average, colorspace_name, #eql?, from_cgats, #hash, #initialize, num_components, #to_s, #to_str

Methods included from Math

#deg2rad, #rad2deg

Constructor Details

This class inherits a constructor from Color::Base

Class Method Details

.cgats_color_rep ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 13

def self.cgats_color_rep
  'K'
end

.cgats_fields ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 9

def self.cgats_fields
  %w{GRAY_K}
end

.component_names ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 5

def self.component_names
  [:k]
end

Instance Method Details

#k ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 17

def k
  @components[0]
end

#to_cgats ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 25

def to_cgats
  {
    'GRAY_K' => k,
  }
end

#to_lab ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 36

def to_lab
  Color::Lab.new(l: 100 - k, a: 0, b: 0)
end

#to_rgb ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 31

def to_rgb
  n = 1 - value
  Color::RGB.new([n, n, n])
end

#to_xyz ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 40

def to_xyz
  to_lab.to_xyz
end

#value ⇒ Object 



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# File 'lib/quadtone/color/gray.rb', line 21

def value
  k / 100.0
end