smooth function Null safety

Image smooth(
  1. Image src,
  2. num w
)

Apply a smoothing convolution filter to the src image.

w is the weight of the current pixel being filtered. If it's greater than 1.0, it will make the image sharper.

Implementation

Image smooth(Image src, num w) {
  final filter = [1.0, 1.0, 1.0, 1.0, w.toDouble(), 1.0, 1.0, 1.0, 1.0];
  return convolution(src, filter, div: w + 8, offset: 0);
}