separableConvolution function Null safety

Image separableConvolution(
  1. Image src,
  2. SeparableKernel kernel
)

Apply a generic separable convolution filter the src image, using the given kernel.

gaussianBlur is an example of such a filter.

Implementation

Image separableConvolution(Image src, SeparableKernel kernel) {
  // Apply the filter horizontally
  final tmp = Image.from(src);
  kernel.apply(src, tmp);

  // Apply the filter vertically, applying back to the original image.
  kernel.apply(tmp, src, horizontal: false);

  return src;
}