labFromArgb static method

List<double> labFromArgb(
  1. int argb
)

Implementation

static List<double> labFromArgb(int argb) {
  final linearR = linearized(redFromArgb(argb));
  final linearG = linearized(greenFromArgb(argb));
  final linearB = linearized(blueFromArgb(argb));
  const matrix = srgbToXyz;
  final x =
      matrix[0][0] * linearR +
      matrix[0][1] * linearG +
      matrix[0][2] * linearB;
  final y =
      matrix[1][0] * linearR +
      matrix[1][1] * linearG +
      matrix[1][2] * linearB;
  final z =
      matrix[2][0] * linearR +
      matrix[2][1] * linearG +
      matrix[2][2] * linearB;
  final xNormalized = x / whitePointD65[0];
  final yNormalized = y / whitePointD65[1];
  final zNormalized = z / whitePointD65[2];
  final fx = _labF(xNormalized);
  final fy = _labF(yNormalized);
  final fz = _labF(zNormalized);
  final l = 116.0 * fy - 16.0;
  final a = 500.0 * (fx - fy);
  final b = 200.0 * (fy - fz);
  return [l, a, b];
}