Class: Abachrome::Outputs::CSS

Inherits:
Object
  • Object
show all
Defined in:
lib/abachrome/outputs/css.rb

Class Method Summary collapse

Class Method Details

.format(color, gamut: nil, companding: nil) ⇒ Object 



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# File 'lib/abachrome/outputs/css.rb', line 9

def self.format(color, gamut: nil, companding: nil)
  rgb_color = color.to_rgb
  r, g, b = rgb_color.coordinates
  a = rgb_color.alpha

  # Apply gamut mapping if provided
  r, g, b = gamut.map([r, g, b]) if gamut

  # Apply companding if provided
  if companding
    r = companding.call(r)
    g = companding.call(g)
    b = companding.call(b)
  end

  # Convert to 8-bit values
  r = (r * 255).round
  g = (g * 255).round
  b = (b * 255).round

  # Format based on alpha value
  return Kernel.format("rgba(%d, %d, %d, %.3f)", r, g, b, a) unless a == AbcDecimal.new("1.0")
  return Kernel.format("#%02x%02x%02x", r, g, b) unless r == g && g == b

  # Use shortened hex format for grayscale
  hex = Kernel.format("%02x", r)
  "##{hex}#{hex}#{hex}"
end

.format_hex(color, gamut: nil, companding: nil) ⇒ Object 



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# File 'lib/abachrome/outputs/css.rb', line 38

def self.format_hex(color, gamut: nil, companding: nil)
  rgb_color = color.to_rgb
  r, g, b = rgb_color.coordinates
  a = rgb_color.alpha

  # Apply gamut mapping if provided
  r, g, b = gamut.map([r, g, b]) if gamut

  # Apply companding if provided
  if companding
    r = companding.call(r)
    g = companding.call(g)
    b = companding.call(b)
  end

  r = (r * 255).round
  g = (g * 255).round
  b = (b * 255).round

  if a == AbcDecimal.new("1.0")
    Kernel.format("#%02x%02x%02x", r, g, b)
  else
    a = (a * 255).round
    Kernel.format("#%02x%02x%02x%02x", r, g, b, a)
  end
end

.format_oklab(color, gamut: nil, companding: nil, precision: 3) ⇒ Object 



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# File 'lib/abachrome/outputs/css.rb', line 91

def self.format_oklab(color, gamut: nil, companding: nil, precision: 3)
  oklab_color = color.to_oklab
  l, a, b = oklab_color.coordinates
  alpha = oklab_color.alpha

  # Apply gamut mapping if provided
  l, a, b = gamut.map([l, a, b]) if gamut

  # Apply companding if provided
  if companding
    l = companding.call(l)
    a = companding.call(a)
    b = companding.call(b)
  end

  # Format with appropriate precision
  format_string = "%.#{precision}f %.#{precision}f %.#{precision}f"

  if alpha == AbcDecimal.new("1.0")
    Kernel.format("oklab(#{format_string})", l, a, b)
  else
    Kernel.format("oklab(#{format_string} / %.#{precision}f)", l, a, b, alpha)
  end
end

.format_rgb(color, gamut: nil, companding: nil) ⇒ Object 



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# File 'lib/abachrome/outputs/css.rb', line 65

def self.format_rgb(color, gamut: nil, companding: nil)
  rgb_color = color.to_rgb
  r, g, b = rgb_color.coordinates
  a = rgb_color.alpha

  # Apply gamut mapping if provided
  r, g, b = gamut.map([r, g, b]) if gamut

  # Apply companding if provided
  if companding
    r = companding.call(r)
    g = companding.call(g)
    b = companding.call(b)
  end

  r = (r * 255).round
  g = (g * 255).round
  b = (b * 255).round

  if a == AbcDecimal.new("1.0")
    Kernel.format("rgb(%d, %d, %d)", r, g, b)
  else
    Kernel.format("rgba(%d, %d, %d, %.3f)", r, g, b, a)
  end
end