Class: Colorspace::XYZTristimulus

Inherits:
Object
  • Object
show all
Defined in:
lib/colorspace/colorlib.rb

Overview

A tristimulus value in the CIE 1931 space.

Instance Method Summary collapse

Instance Method Details

#to_a ⇒ Object 



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# File 'lib/colorspace/colorlib.rb', line 63

def to_a = to_ary

#to_ary ⇒ Object

rubocop: enable Metrics/AbcSize



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# File 'lib/colorspace/colorlib.rb', line 62

def to_ary = [x, y, z]

#to_cielab(illuminant: D65) ⇒ Object

rubocop: disable Metrics/AbcSize



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# File 'lib/colorspace/colorlib.rb', line 50

def to_cielab(illuminant: D65)
  x_, y_, z_ = x * 100, y * 100, z * 100
  xn, yn, zn = illuminant.x, illuminant.y, illuminant.z

  l = (116 * scale_f(y_ / yn)) - 16
  a = 500 * (scale_f(x_ / xn) - scale_f(y_ / yn))
  b = 200 * (scale_f(y_ / yn) - scale_f(z_ / zn))

  CIELABColor.new(l:, a:, b:)
end

#to_srgb ⇒ Object 



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# File 'lib/colorspace/colorlib.rb', line 34

def to_srgb
  to_srgb_linear.gamma_compress
end

#to_srgb_linear ⇒ Object 



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# File 'lib/colorspace/colorlib.rb', line 28

def to_srgb_linear
  r, g, b = (XYZ_RGB_MATRIX * Matrix[[x], [y], [z]]).to_a.flatten

  SRGBLinearColor.new(r:, g:, b:)
end