# File lib/origami/graphics/colors.rb, line 67 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
# File lib/origami/graphics/colors.rb, line 75 def self.gray_to_rgb(g) [ g, g, g ] end
# File lib/origami/graphics/colors.rb, line 113 def Color.to_a(color) return color if color.is_a?(::Array) if (color.respond_to? :r and color.respond_to? :g and color.respond_to? :b) r = (color.respond_to?(:r) ? color.r : color[0]).to_f / 255 g = (color.respond_to?(:g) ? color.g : color[1]).to_f / 255 b = (color.respond_to?(:b) ? color.b : color[2]).to_f / 255 return [r, g, b] elsif (color.respond_to? :c and color.respond_to? :m and color.respond_to? :y and color.respond_to? :k) c = (color.respond_to?(:c) ? color.c : color[0]).to_f m = (color.respond_to?(:m) ? color.m : color[1]).to_f y = (color.respond_to?(:y) ? color.y : color[2]).to_f k = (color.respond_to?(:k) ? color.k : color[3]).to_f return [c,m,y,k] elsif color.respond_to?:g or (0.0..1.0) === color g = color.respond_to?(:g) ? color.g : color return [ g ] else raise TypeError, "Invalid color : #{color}" end end
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