Module: Shoes::Colors

Extended by:
Colors
Included in:
Colors, Drawable
Defined in:
lacci/lib/shoes/colors.rb

Instance Method Summary collapse

Instance Method Details

#gray(darkness = 128, alpha = nil) ⇒ Object

https://github.com/shoes/shoes3/blob/b856f28795112ecb64bc8f891ac166675f059beb/static/manual-en.txt#L839-L847



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# File 'lacci/lib/shoes/colors.rb', line 161

def gray(darkness = 128, alpha = nil)
  alpha ||= (darkness.is_a?(Integer) ? 255 : 1.0)
  [darkness, darkness, darkness, alpha]
end

#rgb(r, g, b, a = nil) ⇒ Object

Shoes allows RGB values to be Floats between 0 and 1 or Integers between 0 and 255



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# File 'lacci/lib/shoes/colors.rb', line 167

def rgb(r, g, b, a = nil)
  if r.is_a?(Float)
    [r, g, b, a || 1.0]
  elsif r.is_a?(Integer)
    [r, g, b, a || 255]
  else
    raise("RGB values should be Float or Integer!")
  end
end

#to_rgb(color) ⇒ Object 



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# File 'lacci/lib/shoes/colors.rb', line 177

def to_rgb(color)
  case color
  when nil
    nil
  when Array
    color # Already an RGB array
  when Symbol
    if COLORS[color]
      rgb(*COLORS[color])
    else
      raise("Unrecognised color name: #{color}")
    end
  when String
    if color[0] == "#"
      if color.length == 4
        r = color[1].to_i(16)
        g = color[2].to_i(16)
        b = color[3].to_i(16)
        rgb(16 * r, 16 * g, 16 * b)
      elsif color.length == 7
        r = color[1..2].to_i(16)
        g = color[3..4].to_i(16)
        b = color[5..6].to_i(16)
        rgb(r, g, b)
      else
        raise("Don't know how to convert #{color.inspect} to RGB! (wrong number of digits)")
      end
    else
      rgb_value = COLORS[color.to_sym]
      if rgb_value
        rgb(*rgb_value)
      else
        raise("Unrecognised color name: #{color}")
      end
    end
  else
    raise("Don't know how to convert #{color.inspect} to RGB!")
  end
end