Class: Rszr::Color::RGBA

Inherits:
Base
  • Object
show all
Defined in:
lib/rszr/color/rgba.rb

Instance Attribute Summary collapse

Attributes inherited from Base

#alpha

Instance Method Summary collapse

Methods inherited from Base

#==, #cmya, #rgba, #to_fill

Constructor Details

#initialize(red, green, blue, alpha = 255) ⇒ RGBA

Returns a new instance of RGBA.



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# File 'lib/rszr/color/rgba.rb', line 25

def initialize(red, green, blue, alpha = 255)
  if red < 0 || red > 255 || green < 0 || green > 255 || blue < 0 || blue > 255 || alpha < 0 || alpha > 255
    raise ArgumentError, 'color out of range'
  end
  @red, @green, @blue, @alpha = red, green, blue, alpha
end

Instance Attribute Details

#blue ⇒ Object (readonly)

Returns the value of attribute blue.



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# File 'lib/rszr/color/rgba.rb', line 23

def blue
  @blue
end

#green ⇒ Object (readonly)

Returns the value of attribute green.



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# File 'lib/rszr/color/rgba.rb', line 23

def green
  @green
end

#red ⇒ Object (readonly)

Returns the value of attribute red.



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# File 'lib/rszr/color/rgba.rb', line 23

def red
  @red
end

Instance Method Details

#cyan ⇒ Object 



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# File 'lib/rszr/color/rgba.rb', line 32

def cyan
  255 - red
end

#magenta ⇒ Object 



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# File 'lib/rszr/color/rgba.rb', line 36

def magenta
  255 - green
end

#to_hex(alpha: true) ⇒ Object 



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# File 'lib/rszr/color/rgba.rb', line 49

def to_hex(alpha: true)
  "#%0#{alpha ? 8 : 6}x" % to_i(alpha: alpha)
end

#to_i(alpha: true) ⇒ Object 



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# File 'lib/rszr/color/rgba.rb', line 44

def to_i(alpha: true)
  i = red.to_i << 24 | green.to_i << 16 | blue.to_i << 8 | self.alpha.to_i
  alpha ? i : i >> 8
end

#yellow ⇒ Object 



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# File 'lib/rszr/color/rgba.rb', line 40

def yellow
  255 - blue
end