Module: Smalruby::Color

Defined in:
lib/smalruby/color.rb

Overview

色を表現するモジュール

Constant Summary collapse

NAME_TO_CODE =

名前から色のコードへの変換テーブル参照: www.colordic.org/

{
  'black' => [0x00, 0x00, 0x00],
  'dimgray' => [0x69, 0x69, 0x69],
  'gray' => [0x80, 0x80, 0x80],
  'darkgray' => [0xa9, 0xa9, 0xa9],
  'silver' => [0xc0, 0xc0, 0xc0],
  'lightgrey' => [0xd3, 0xd3, 0xd3],
  'gainsboro' => [0xdc, 0xdc, 0xdc],
  'whitesmoke' => [0xf5, 0xf5, 0xf5],
  'white' => [0xff, 0xff, 0xff],
  'snow' => [0xff, 0xfa, 0xfa],
  'ghostwhite' => [0xf8, 0xf8, 0xff],
  'floralwhite' => [0xff, 0xfa, 0xf0],
  'linen' => [0xfa, 0xf0, 0xe6],
  'antiquewhite' => [0xfa, 0xeb, 0xd7],
  'papayawhip' => [0xff, 0xef, 0xd5],
  'blanchedalmond' => [0xff, 0xeb, 0xcd],
  'bisque' => [0xff, 0xe4, 0xc4],
  'moccasin' => [0xff, 0xe4, 0xb5],
  'navajowhite' => [0xff, 0xde, 0xad],
  'peachpuff' => [0xff, 0xda, 0xb9],
  'mistyrose' => [0xff, 0xe4, 0xe1],
  'lavenderblush' => [0xff, 0xf0, 0xf5],
  'seashell' => [0xff, 0xf5, 0xee],
  'oldlace' => [0xfd, 0xf5, 0xe6],
  'ivory' => [0xff, 0xff, 0xf0],
  'honeydew' => [0xf0, 0xff, 0xf0],
  'mintcream' => [0xf5, 0xff, 0xfa],
  'azure' => [0xf0, 0xff, 0xff],
  'aliceblue' => [0xf0, 0xf8, 0xff],
  'lavender' => [0xe6, 0xe6, 0xfa],
  'lightsteelblue' => [0xb0, 0xc4, 0xde],
  'lightslategray' => [0x77, 0x88, 0x99],
  'slategray' => [0x70, 0x80, 0x90],
  'steelblue' => [0x46, 0x82, 0xb4],
  'royalblue' => [0x41, 0x69, 0xe1],
  'midnightblue' => [0x19, 0x19, 0x70],
  'navy' => [0x00, 0x00, 0x80],
  'darkblue' => [0x00, 0x00, 0x8b],
  'mediumblue' => [0x00, 0x00, 0xcd],
  'blue' => [0x00, 0x00, 0xff],
  'dodgerblue' => [0x1e, 0x90, 0xff],
  'cornflowerblue' => [0x64, 0x95, 0xed],
  'deepskyblue' => [0x00, 0xbf, 0xff],
  'lightskyblue' => [0x87, 0xce, 0xfa],
  'skyblue' => [0x87, 0xce, 0xeb],
  'lightblue' => [0xad, 0xd8, 0xe6],
  'powderblue' => [0xb0, 0xe0, 0xe6],
  'paleturquoise' => [0xaf, 0xee, 0xee],
  'lightcyan' => [0xe0, 0xff, 0xff],
  'cyan' => [0x00, 0xff, 0xff],
  'aqua' => [0x00, 0xff, 0xff],
  'turquoise' => [0x40, 0xe0, 0xd0],
  'mediumturquoise' => [0x48, 0xd1, 0xcc],
  'darkturquoise' => [0x00, 0xce, 0xd1],
  'lightseagreen' => [0x20, 0xb2, 0xaa],
  'cadetblue' => [0x5f, 0x9e, 0xa0],
  'darkcyan' => [0x00, 0x8b, 0x8b],
  'teal' => [0x00, 0x80, 0x80],
  'darkslategray' => [0x2f, 0x4f, 0x4f],
  'darkgreen' => [0x00, 0x64, 0x00],
  'green' => [0x00, 0x80, 0x00],
  'forestgreen' => [0x22, 0x8b, 0x22],
  'seagreen' => [0x2e, 0x8b, 0x57],
  'mediumseagreen' => [0x3c, 0xb3, 0x71],
  'mediumaquamarine' => [0x66, 0xcd, 0xaa],
  'darkseagreen' => [0x8f, 0xbc, 0x8f],
  'aquamarine' => [0x7f, 0xff, 0xd4],
  'palegreen' => [0x98, 0xfb, 0x98],
  'lightgreen' => [0x90, 0xee, 0x90],
  'springgreen' => [0x00, 0xff, 0x7f],
  'mediumspringgreen' => [0x00, 0xfa, 0x9a],
  'lawngreen' => [0x7c, 0xfc, 0x00],
  'chartreuse' => [0x7f, 0xff, 0x00],
  'greenyellow' => [0xad, 0xff, 0x2f],
  'lime' => [0x00, 0xff, 0x00],
  'limegreen' => [0x32, 0xcd, 0x32],
  'yellowgreen' => [0x9a, 0xcd, 0x32],
  'darkolivegreen' => [0x55, 0x6b, 0x2f],
  'olivedrab' => [0x6b, 0x8e, 0x23],
  'olive' => [0x80, 0x80, 0x00],
  'darkkhaki' => [0xbd, 0xb7, 0x6b],
  'palegoldenrod' => [0xee, 0xe8, 0xaa],
  'cornsilk' => [0xff, 0xf8, 0xdc],
  'beige' => [0xf5, 0xf5, 0xdc],
  'lightyellow' => [0xff, 0xff, 0xe0],
  'lightgoldenrodyellow' => [0xfa, 0xfa, 0xd2],
  'lemonchiffon' => [0xff, 0xfa, 0xcd],
  'wheat' => [0xf5, 0xde, 0xb3],
  'burlywood' => [0xde, 0xb8, 0x87],
  'tan' => [0xd2, 0xb4, 0x8c],
  'khaki' => [0xf0, 0xe6, 0x8c],
  'yellow' => [0xff, 0xff, 0x00],
  'gold' => [0xff, 0xd7, 0x00],
  'orange' => [0xff, 0xa5, 0x00],
  'sandybrown' => [0xf4, 0xa4, 0x60],
  'darkorange' => [0xff, 0x8c, 0x00],
  'goldenrod' => [0xda, 0xa5, 0x20],
  'peru' => [0xcd, 0x85, 0x3f],
  'darkgoldenrod' => [0xb8, 0x86, 0x0b],
  'chocolate' => [0xd2, 0x69, 0x1e],
  'sienna' => [0xa0, 0x52, 0x2d],
  'saddlebrown' => [0x8b, 0x45, 0x13],
  'maroon' => [0x80, 0x00, 0x00],
  'darkred' => [0x8b, 0x00, 0x00],
  'brown' => [0xa5, 0x2a, 0x2a],
  'firebrick' => [0xb2, 0x22, 0x22],
  'indianred' => [0xcd, 0x5c, 0x5c],
  'rosybrown' => [0xbc, 0x8f, 0x8f],
  'darksalmon' => [0xe9, 0x96, 0x7a],
  'lightcoral' => [0xf0, 0x80, 0x80],
  'salmon' => [0xfa, 0x80, 0x72],
  'lightsalmon' => [0xff, 0xa0, 0x7a],
  'coral' => [0xff, 0x7f, 0x50],
  'tomato' => [0xff, 0x63, 0x47],
  'orangered' => [0xff, 0x45, 0x00],
  'red' => [0xff, 0x00, 0x00],
  'crimson' => [0xdc, 0x14, 0x3c],
  'mediumvioletred' => [0xc7, 0x15, 0x85],
  'deeppink' => [0xff, 0x14, 0x93],
  'hotpink' => [0xff, 0x69, 0xb4],
  'palevioletred' => [0xdb, 0x70, 0x93],
  'pink' => [0xff, 0xc0, 0xcb],
  'lightpink' => [0xff, 0xb6, 0xc1],
  'thistle' => [0xd8, 0xbf, 0xd8],
  'magenta' => [0xff, 0x00, 0xff],
  'fuchsia' => [0xff, 0x00, 0xff],
  'violet' => [0xee, 0x82, 0xee],
  'plum' => [0xdd, 0xa0, 0xdd],
  'orchid' => [0xda, 0x70, 0xd6],
  'mediumorchid' => [0xba, 0x55, 0xd3],
  'darkorchid' => [0x99, 0x32, 0xcc],
  'darkviolet' => [0x94, 0x00, 0xd3],
  'darkmagenta' => [0x8b, 0x00, 0x8b],
  'purple' => [0x80, 0x00, 0x80],
  'indigo' => [0x4b, 0x00, 0x82],
  'darkslateblue' => [0x48, 0x3d, 0x8b],
  'blueviolet' => [0x8a, 0x2b, 0xe2],
  'mediumpurple' => [0x93, 0x70, 0xdb],
  'slateblue' => [0x6a, 0x5a, 0xcd],
  'mediumslateblue' => [0x7b, 0x68, 0xee]
}
HUE_PER_6 =

3 = R, G, B, 2 = Up, Down

200.0 / (3.0 * 2.0)
NAMES =

色名の配列

NAME_TO_CODE.keys

Class Method Summary collapse

Class Method Details

.hsl_to_rgb(h, s, l) ⇒ Array

Convert HSV Color model to RGB Color model

Parameters:

  • h (Integer)
  • s (Integer)
  • l (Integer)

Returns:

  • (Array) —

    red,green,blue color red,green,blue in the range [0,255]



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# File 'lib/smalruby/color.rb', line 236

def hsl_to_rgb(h, s, l)
  h %= 201
  s %= 101
  l %= 101
  if l <= 49
    color_max = 255.0 * (l + l * (s / 100.0)) / 100.0
    color_min = 255.0 * (l - l * (s / 100.0)) / 100.0
  else
    color_max = 255.0 * (l + (100 - l) * (s / 100.0)) / 100.0
    color_min = 255.0 * (l - (100 - l) * (s / 100.0)) / 100.0
  end

  if h < HUE_PER_6
    base = h
  elsif h < HUE_PER_6 * 3
    base = (h - HUE_PER_6 * 2).abs
  elsif h < HUE_PER_6 * 5
    base = (h - HUE_PER_6 * 4).abs
  else
    base = (200 - h)
  end
  base = base / HUE_PER_6 * (color_max - color_min) + color_min

  divide = (h / HUE_PER_6).to_i
  red, green, blue = (case divide
                      when 0 then  [color_max, base, color_min]
                      when 1 then  [base, color_max, color_min]
                      when 2 then  [color_min, color_max, base]
                      when 3 then  [color_min, base, color_max]
                      when 4 then  [base, color_min, color_max]
                      else         [color_max, color_min, base]
                      end)

  [red.round, green.round, blue.round]
end

.rgb_to_hsl(red, green, blue) ⇒ Array

Convert RGB Color model to HSL Color model

Parameters:

  • red (Integer)
  • green (Integer)
  • blue (Integer)

Returns:

  • (Array) —

    hue, saturation, lightness hue in the range [0,200], saturation and lightness in the range [0, 100]



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# File 'lib/smalruby/color.rb', line 183

def rgb_to_hsl(red, green, blue)
  red = round_rgb_color(red)
  green = round_rgb_color(green)
  blue = round_rgb_color(blue)

  color_max = [red, green, blue].max
  color_min = [red, green, blue].min
  color_range = color_max - color_min
  if color_range == 0
    return [0, 0, (color_max * 100.0 / 255).to_i]
  end
  color_range = color_range.to_f
  hue = (case color_max
         when red then
           HUE_PER_6 * ((green - blue) / color_range)
         when green  then
           HUE_PER_6 * ((blue - red) / color_range) + HUE_PER_6 * 2
         else
           HUE_PER_6 * ((red - green) / color_range) + HUE_PER_6 * 4
         end)

  cnt = color_range / 2.0
  if cnt <= 127
    saturation = color_range / (color_max + color_min) * 100
  else
    saturation = color_range / (510 - color_max - color_min) * 100
  end
  lightness = (color_max + color_min) / 2.0 / 255.0 * 100

  [hue.round, saturation.round, lightness.round]
end

.round_rgb_color(value) ⇒ Integer

Round rgb color 0 to 255

Parameters:

  • value (Integer) —

    RGB color

Returns:

  • (Integer) —

    rounded RGB color



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# File 'lib/smalruby/color.rb', line 219

def round_rgb_color(value)
  if value > 255
    255
  elsif value < 0
    0
  else
    value
  end
end

.smalruby_to_dxruby(color) ⇒ Object

Smalrubyの色名からDXRubyの色コードに変換する



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# File 'lib/smalruby/color.rb', line 160

def smalruby_to_dxruby(color)
  if color.is_a?(String) || color.is_a?(Symbol)
    color = color.to_s.downcase
    if color == 'random'
      [rand(0..0xff), rand(0..0xff), rand(0..0xff)]
    elsif NAME_TO_CODE.key?(color)
      NAME_TO_CODE[color]
    else
      fail "色の指定が間違っています: #{color}"
    end
  else
    color
  end
end