Gradient.linear constructor

Gradient.linear(Offset from, Offset to, List<Color> colors, [ List<double> colorStops, TileMode tileMode = TileMode.clamp ])

Creates a linear gradient from from to to.

If colorStops is provided, colorStops[i] is a number from 0.0 to 1.0 that specifies where color[i] begins in the gradient. If colorStops is not provided, then only two stops, at 0.0 and 1.0, are implied (and color must therefore only have two entries).

The behavior before from and after to is described by the tileMode argument. For details, see the TileMode enum.

If from, to, colors, or tileMode are null, or if colors or colorStops contain null values, this constructor will throw a NoSuchMethodError.

Implementation 

Gradient.linear(
  Offset from,
  Offset to,
  List<Color> colors, [
  List<double> colorStops,
  TileMode tileMode = TileMode.clamp,
]) : assert(_offsetIsValid(from)),
     assert(_offsetIsValid(to)),
     assert(colors != null),
     assert(tileMode != null),
     super._() {
  _validateColorStops(colors, colorStops);
  final Float32List endPointsBuffer = _encodeTwoPoints(from, to);
  final Int32List colorsBuffer = _encodeColorList(colors);
  final Float32List colorStopsBuffer = colorStops == null ? null : new Float32List.fromList(colorStops);
  _constructor();
  _initLinear(endPointsBuffer, colorsBuffer, colorStopsBuffer, tileMode.index);
}