Class: FoggyMirror::Color

Inherits:
Object
  • Object
show all
Defined in:
lib/foggy-mirror/color.rb

Constant Summary collapse

RGB_WEIGHTS = 
[0.299, 0.587, 0.114].freeze
PADDED_RGB_HEX = 
'%06x'

Instance Method Summary collapse

Constructor Details

#initialize(color) ⇒ Color

Returns a new instance of Color.



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# File 'lib/foggy-mirror/color.rb', line 9

def initialize(color)
  if color.kind_of?(String)
    color = color[/[A-Z0-9]{6}/i].to_i(16)
  elsif color.kind_of?(Array)
    color = (color[0] << 16) + (color[1] << 8) + color[2]
  end

  color = color.to_i

  if color > 0xFFFFFF || color < 0
    raise ArgumentError, "out of range color value (#{color < 0 ? '-' : ''}0x#{color.abs.to_s(16).upcase})"
  end

  @value = color.to_i
end

Instance Method Details

#==(oth) ⇒ Object Also known as: eql? 



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# File 'lib/foggy-mirror/color.rb', line 45

def ==(oth)
  oth.to_i == @value
end

#blue ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 41

def blue
  @value & 0x0000FF
end

#brightness(weights: RGB_WEIGHTS) ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 25

def brightness(weights: RGB_WEIGHTS)
  Math.sqrt(
    weights[0] * red ** 2 +
    weights[1] * green ** 2 +
    weights[2] * blue ** 2
  ).to_i
end

#green ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 37

def green
  (@value & 0x00FF00) >> 8
end

#hash ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 50

def hash
  @value.hash
end

#inspect ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 71

def inspect
  "#<#{self.class.name} #{to_s}>"
end

#red ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 33

def red
  (@value & 0xFF0000) >> 16
end

#to_i ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 67

def to_i
  @value
end

#to_s(prefix: '#', shorthand: true) ⇒ Object 



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# File 'lib/foggy-mirror/color.rb', line 54

def to_s(prefix: '#', shorthand: true)
  if shorthand
    return 'red' if @value == 0xFF0000

    if (@value & 0xF0F0F0) == (@value & 0x0F0F0F) << 4
      hex = to_s(prefix: '', shorthand: false)
      return prefix.to_s + hex[0] + hex[2] + hex[4]
    end
  end

  prefix.to_s + (PADDED_RGB_HEX % @value).upcase
end