NAPLPS Support

[pheller]

Support for the old NAPLPS vector graphics standard would be fantastic. There are almost no extant tools to author and only a couple to even view graphics in this format.

References:

A relatively concise description - http://www.martinreddy.net/gfx/2d/NAP.txt
The ANSI Standards document - https://archive.org/details/federalinformati121nati

A very old Java viewer - https://github.com/n1ckfg/Telidon/tree/master/third_party/ajwm-naplps

(elsewhere in the aforementioned github, there is a Javascript renderer)

Ideally, support for this format would be accompanied by some modern conveniences, like layers that can be independently shown or hidden, and a mechanism for a read-only raster layer and configurable layer opacity (to assist in tracing and recreating NAPLPS from raster images scanned from books, etc.)