Class: EhbGameLib::Palettes::Color

Inherits:
Object
  • Object
show all
Defined in:
lib/ehb_game_lib/palettes/color.rb

Constant Summary collapse

QUANTUM_MIN = 
0
QUANTUM_MAX = 
255
QUANTUM_RANGE = 
(QUANTUM_MIN..QUANTUM_MAX).freeze

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(red, green, blue, alpha = QUANTUM_MAX) ⇒ Color

Returns a new instance of Color.



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# File 'lib/ehb_game_lib/palettes/color.rb', line 44

def initialize(red, green, blue, alpha = QUANTUM_MAX)
  @red = self.class.validate_quantum(red)
  @green = self.class.validate_quantum(green)
  @blue = self.class.validate_quantum(blue)
  @alpha = self.class.validate_quantum(alpha)
end

Instance Attribute Details

#alpha ⇒ Object (readonly)

Returns the value of attribute alpha.



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# File 'lib/ehb_game_lib/palettes/color.rb', line 42

def alpha
  @alpha
end

#blue ⇒ Object (readonly)

Returns the value of attribute blue.



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# File 'lib/ehb_game_lib/palettes/color.rb', line 42

def blue
  @blue
end

#green ⇒ Object (readonly)

Returns the value of attribute green.



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# File 'lib/ehb_game_lib/palettes/color.rb', line 42

def green
  @green
end

#red ⇒ Object (readonly)

Returns the value of attribute red.



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# File 'lib/ehb_game_lib/palettes/color.rb', line 42

def red
  @red
end

Class Method Details

.array_from_file(file_path) ⇒ Array<EhbGameLib::Palettes::Color>

Returns:



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# File 'lib/ehb_game_lib/palettes/color.rb', line 29

def array_from_file(file_path)
  r = []
  ::File.open(file_path.to_s) do |file|
    while (b = file.read(3))
      b = b.bytes.to_a
      r << ::EhbGameLib::Palettes::Color.new(b[0], b[1], b[2])
    end
  end
  r
end

.quantum_to_magick_range(quantum, invert = false) ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 22

def quantum_to_magick_range(quantum, invert = false)
  r = ((quantum / QUANTUM_MAX.to_f) * ::Magick::QuantumRange).floor
  r = ::Magick::QuantumRange - r if invert
  r
end

.validate_quantum(quantum) ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 15

def validate_quantum(quantum)
  raise "Not a integer: #{quantum}" unless quantum.is_a?(::Integer)
  raise 'Out of bounds' unless QUANTUM_RANGE.include?(quantum)

  quantum
end

Instance Method Details

#gosu_color ⇒ Gosu::Color

Returns:

  • (Gosu::Color) 


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# File 'lib/ehb_game_lib/palettes/color.rb', line 52

def gosu_color
  @gosu_color ||= ::Gosu::Color.rgba(red, green, blue, alpha)
end

#magick_pixel ⇒ Magick::Pixel

Returns:

  • (Magick::Pixel) 


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# File 'lib/ehb_game_lib/palettes/color.rb', line 57

def magick_pixel
  @magick_pixel ||= ::Magick::Pixel.new(
    *[red, green, blue].map { |n| self.class.quantum_to_magick_range(n) },
    self.class.quantum_to_magick_range(alpha, true)
  )
end

#names ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 64

def names
  Array(::Colorname.find(red, green, blue))
end

#rgb_to_s ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 68

def rgb_to_s
  values_to_s(red, green, blue)
end

#rgba_to_s ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 72

def rgba_to_s
  rgb_to_s + '|' + values_to_s(alpha)
end

#to_a ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 76

def to_a
  [red, green, blue, alpha]
end

#to_html ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 84

def to_html
  '#' + rgb_to_s
end

#to_s ⇒ Object 



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# File 'lib/ehb_game_lib/palettes/color.rb', line 80

def to_s
  rgba_to_s
end