Class: Skia::Color

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

Constant Summary collapse

TRANSPARENT = 
new(0x00000000)
BLACK = 
new(0xFF000000)
WHITE = 
new(0xFFFFFFFF)
RED = 
new(0xFFFF0000)
GREEN = 
new(0xFF00FF00)
BLUE = 
new(0xFF0000FF)
YELLOW = 
new(0xFFFFFF00)
CYAN = 
new(0xFF00FFFF)
MAGENTA = 
new(0xFFFF00FF)
GRAY = 
new(0xFF808080)
LIGHT_GRAY = 
new(0xFFC0C0C0)
DARK_GRAY = 
new(0xFF404040)

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(r_or_value = 0, g = nil, b = nil, a = 255) ⇒ Color

Returns a new instance of Color.



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# File 'lib/skia/color.rb', line 7

def initialize(r_or_value = 0, g = nil, b = nil, a = 255)
  @value = if g.nil? && b.nil?
             r_or_value.is_a?(Integer) ? r_or_value : 0xFF000000
           else
             ((a & 0xFF) << 24) | ((r_or_value & 0xFF) << 16) | ((g & 0xFF) << 8) | (b & 0xFF)
           end
end

Instance Attribute Details

#value ⇒ Object (readonly)

Returns the value of attribute value.



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# File 'lib/skia/color.rb', line 5

def value
  @value
end

Class Method Details

.argb(a, r, g, b) ⇒ Object 



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# File 'lib/skia/color.rb', line 15

def self.argb(a, r, g, b)
  new(r, g, b, a)
end

.from_hex(hex_string) ⇒ Object 



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# File 'lib/skia/color.rb', line 23

def self.from_hex(hex_string)
  hex = hex_string.delete_prefix('#')
  case hex.length
  when 6
    new(hex.to_i(16) | 0xFF000000)
  when 8
    new(hex.to_i(16))
  else
    raise ArgumentError, "Invalid hex color format: #{hex_string}"
  end
end

.rgb(r, g, b) ⇒ Object 



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# File 'lib/skia/color.rb', line 19

def self.rgb(r, g, b)
  new(r, g, b, 255)
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'lib/skia/color.rb', line 63

def ==(other)
  return false unless other.is_a?(Color)

  @value == other.value
end

#alpha ⇒ Object 



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# File 'lib/skia/color.rb', line 35

def alpha
  (@value >> 24) & 0xFF
end

#blue ⇒ Object 



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# File 'lib/skia/color.rb', line 47

def blue
  @value & 0xFF
end

#green ⇒ Object 



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# File 'lib/skia/color.rb', line 43

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

#red ⇒ Object 



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# File 'lib/skia/color.rb', line 39

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

#to_hex ⇒ Object 



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# File 'lib/skia/color.rb', line 55

def to_hex
  format('#%08X', @value)
end

#to_i ⇒ Object 



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# File 'lib/skia/color.rb', line 51

def to_i
  @value
end

#with_alpha(a) ⇒ Object 



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# File 'lib/skia/color.rb', line 59

def with_alpha(a)
  self.class.new(red, green, blue, a)
end