solveToInt static method

int solveToInt(double hueDegrees, double chroma, double lstar, [ String callSite = '?', ])

Finds an sRGB color with the given hue, chroma, and L*, if possible.

Returns a hexadecimal representing a sRGB color with its hue, chroma, and L* sufficiently close to hueDegrees, chroma, and lstar, respectively. If it is impossible to satisfy all three constraints, the hue and L* will be sufficiently close, and the chroma will be maximized.

Implementation

static int solveToInt(
  double hueDegrees,
  double chroma,
  double lstar, [
  String callSite = '?',
]) {
  final sc = _sc;
  if (chroma < 0.0001 || lstar < 0.0001 || lstar > 99.9999) {
    final y = yFromLstar(lstar);
    final v = y / sc.kSum;
    final c = _delinearSrgb(v);
    return 0xFF000000 | (c << 16) | (c << 8) | c;
  }
  hueDegrees = sanitizeDegreesDouble(hueDegrees);
  final hueRadians = hueDegrees / 180 * pi;
  final y = yFromLstar(lstar);
  final exact = _findResultByJSrgb(sc, hueRadians, chroma, y);
  if (exact != null) {
    return 0xFF000000 |
        (_delinearSrgb(exact.$1) << 16) |
        (_delinearSrgb(exact.$2) << 8) |
        _delinearSrgb(exact.$3);
  }
  final (linR, linG, linB) = _bisectToLimitSrgb(sc, y, hueRadians);
  return 0xFF000000 |
      (_delinearSrgb(linR) << 16) |
      (_delinearSrgb(linG) << 8) |
      _delinearSrgb(linB);
}