padStack

[9il]

This issue is successor for libmir/mir#311.

[9il]

padStack should return a mir.ndslice.stack.Stack. Then mir.ndslice.topology: indexed, ndiota can be used to construct a lazy view, or slice can be used to allocate new image.

[9il]

Draft for 2D:

auto pad(S)(S slice, size_t l0, size_t l1)
{
	auto e = slice[0 .. $, 0 .. $]; //if contiguous then canonical

	auto b = e[0 .. l0].reversed!0;
	auto h = e.reversed!0[0 .. l0];

	auto d = e[0 .. $, 0 .. l1].retro.reversed!0;
	auto f = e.retro.reversed!0[0 .. $, 0 .. l1];

	auto a = d[0 .. l0].reversed!0;
	auto c = f[0 .. l0].reversed!0;

	auto g = d.reversed!0[0 .. l0];
	auto k = f.reversed!0[0 .. l0];

	return
		stack!0(
			stack!1(a, b, c),
			stack!1(d, e, f),
			stack!1(g, h, k),
		);
}

[9il]

Hmm, probably we can add a multidimensional version to mir-algorithm

[ljubobratovicrelja]

Nice! :)

Hmm, probably we can add a multidimensional version to mir-algorithm

I agree!

[9il]

constant padding was added libmir/mir-algorithm#31

[9il]

edge, symmetric and wrap paddings libmir/mir-algorithm#32