C# write interlaced PNGs for zooming spectrograms

[atruskie]

Interlaced PNGs allow for progressive rendering of images (they blur in as opposed to swiping in).

It would result in a much nicer transitioning effect for the zooming images on the visualize page.

https://nuwen.net/png.html

[atruskie]

I've had a look into this. There are no easy to use functional PNG encoders in the .NET world that supports cross-platform usage.

IMO the best bet would be a pull request to the https://github.com/JimBobSquarePants/ImageSharp project.

Sadly we'll likely need to ignore this feature for now.

[atruskie]

@proe has marked this a low priority feature which we'll omit from the current iteration