ImageFilter.matrix constructor

ImageFilter.matrix(Float64List matrix4, { FilterQuality filterQuality: FilterQuality.low })

Creates an image filter that applies a matrix transformation.

For example, applying a positive scale matrix (see new Matrix4.diagonal3) when used with BackdropFilter would magnify the background image.

Implementation 

ImageFilter.matrix(Float64List matrix4,
                   { FilterQuality filterQuality: FilterQuality.low }) {
  if (matrix4.length != 16)
    throw new ArgumentError('"matrix4" must have 16 entries.');
  _constructor();
  _initMatrix(matrix4, filterQuality.index);
}