class Bitmap
if not method_defined?('original_draw_text')
alias original_draw_text draw_text
def draw_text(*arg)

  original_color = self.font.color.dup
  self.font.color = Color.new(0, 0, 0, 128)

  if arg[0].is_a?(Rect)
    arg[0].x += 2
    arg[0].y += 2
    self.original_draw_text(*arg)
    arg[0].x -= 2
    arg[0].y -= 2
  else
    arg[0] += 2
    arg[1] += 2
    self.original_draw_text(*arg)
    arg[0] -= 2
    arg[1] -= 2
  end

  self.font.color = original_color
  self.original_draw_text(*arg)

end
end
def gradation_rect(x, y, width, height, color1, color2, align = 0)
if align == 0
  for i in x...x + width
    red  = color1.red + (color2.red - color1.red) * (i - x) / (width - 1)
    green = color1.green +
            (color2.green - color1.green) * (i - x) / (width - 1)
    blue  = color1.blue +
            (color2.blue - color1.blue) * (i - x) / (width - 1)
    alpha = color1.alpha +
            (color2.alpha - color1.alpha) * (i - x) / (width - 1)
    color = Color.new(red, green, blue, alpha)
    fill_rect(i, y, 1, height, color)
  end
elsif align == 1
  for i in y...y + height
    red  = color1.red +
            (color2.red - color1.red) * (i - y) / (height - 1)
    green = color1.green +
            (color2.green - color1.green) * (i - y) / (height - 1)
    blue  = color1.blue +
            (color2.blue - color1.blue) * (i - y) / (height - 1)
    alpha = color1.alpha +
            (color2.alpha - color1.alpha) * (i - y) / (height - 1)
    color = Color.new(red, green, blue, alpha)
    fill_rect(x, i, width, 1, color)
  end
elsif align == 2
  for i in x...x + width
    for j in y...y + height
      red  = color1.red + (color2.red - color1.red) *
              ((i - x) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      green = color1.green + (color2.green - color1.green) *
              ((i - x) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      blue  = color1.blue + (color2.blue - color1.blue) *
              ((i - x) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      alpha = color1.alpha + (color2.alpha - color1.alpha) *
              ((i - x) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      color = Color.new(red, green, blue, alpha)
      set_pixel(i, j, color)
    end
  end
elsif align == 3
  for i in x...x + width
    for j in y...y + height
      red  = color1.red + (color2.red - color1.red) *
            ((x + width - i) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      green = color1.green + (color2.green - color1.green) *
            ((x + width - i) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      blue  = color1.blue + (color2.blue - color1.blue) *
            ((x + width - i) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      alpha = color1.alpha + (color2.alpha - color1.alpha) *
            ((x + width - i) / (width - 1.0) + (j - y) / (height - 1.0)) / 2
      color = Color.new(red, green, blue, alpha)
      set_pixel(i, j, color)
    end
  end
end
end
end