We only have native support for an array of struct layout, the struct of array layout uses channelview/colorview but it losses the colorant information.

We might want to introduce StructArray to do some internal memory layout shifting without affecting the interface; it's still array of colorant but storing in a struct of array layout.

img = testimage("mandril")
out = StructArray(img)

out  == img # true

Of course, need some more sophiscate benchmark to decide this.