Module: Origami::Graphics::Color

Defined in:
lib/origami/graphics/colors.rb

Defined Under Namespace

Modules: BlendMode, Intent, Space Classes: CMYK, GrayScale, ICCProfile, RGB

Class Method Summary collapse

Class Method Details

.cmyk_to_rgb(c, m, y, k) ⇒ Object 



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# File 'lib/origami/graphics/colors.rb', line 56

def self.cmyk_to_rgb(c, m, y, k)
  r = 1 - ((c * (1 - k) + k))
  g = 1 - ((m * (1 - k) + k))
  b = 1 - ((y * (1 - k) + k))

  [r, g, b]
end

.gray_to_rgb(g) ⇒ Object 



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# File 'lib/origami/graphics/colors.rb', line 64

def self.gray_to_rgb(g)
  [g, g, g]
end

.to_a(color) ⇒ Object 



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# File 'lib/origami/graphics/colors.rb', line 102

def self.to_a(color)
  return color if color.is_a?(::Array)

  if %i[r g b].all? { |c| color.respond_to?(c) }
    r = color.r.to_f / 255
    g = color.g.to_f / 255
    b = color.b.to_f / 255
    [r, g, b]

  elsif %i[c m y k].all? { |c| color.respond_to?(c) }
    c = color.c
    m = color.m
    y = color.y
    k = color.k
    [c, m, y, k]

  elsif color.respond_to?(:g)
    g = color.g
    [g]

  else
    raise TypeError, "Invalid color : #{color}"
  end
end