brightness method

ContainerBuilder brightness(
  1. double value
)

Implementation

ContainerBuilder brightness(double value) => colorFilter(ColorFilter.matrix([
  1.0 * value, 0, 0, 0, 0,
  0, 1.0 * value, 0, 0, 0,
  0, 0, 1.0 * value, 0, 0,
  0, 0, 0, 1, 0,
]));