sepia method

ContainerBuilder sepia([ double amount = 1.0 ])

Implementation

ContainerBuilder sepia([double amount = 1.0]) => colorFilter(ColorFilter.matrix([
  0.393 + 0.607 * (1 - amount), 0.769 - 0.769 * (1 - amount), 0.189 - 0.189 * (1 - amount), 0, 0,
  0.349 - 0.349 * (1 - amount), 0.686 + 0.314 * (1 - amount), 0.168 - 0.168 * (1 - amount), 0, 0,
  0.272 - 0.272 * (1 - amount), 0.534 - 0.534 * (1 - amount), 0.131 + 0.869 * (1 - amount), 0, 0,
  0, 0, 0, 1, 0,
]));