X-Pixmap & NetPBM

• Half the code is Tests, all functions are asserted.
• Only uses system.nim, no imports, does not use std lib, easy to maintain.
• runnableExamples with static: and doAssert.
• Documentation with Examples and Links.
• Works at compile-time, NimScript and JavaScript.
• All functions are func, except 1 that does the I/O.
• Tiny func of 3 ~ 5 lines, simple code, simple API.
• Functionality can be extended with sequtils by the user.
• Examples render 6 small fractals at compile-time to mimic a real-world like usage.
• Only ~300 lines where half are test, 5 image formats.

Random example use cases

• Generate Icons of arbitrary sizes instead of bundling them in binaries and installers.
• Generate patterns on client-side browser instead of transferring them over internet.
• Render QR codes, Bar codes, Icons, visual reports, simple diagrams for documentation, etc.
• Plot charts with data of any kind on any target.
• Anything image related, good addition to SVG and HTML that std lib already can do.

Format

Image format is loss-less and human-readable, UTF-8 but fits ASCII, is also valid C source code, can be embedded in C, supports millions of colors and transparency.

Links

• Rust lang one https://docs.rs/image/latest/image/pnm/struct.PNMEncoder.html
• Python also has a module to draw images on std lib.
• Spec https://en.wikipedia.org/wiki/X_PixMap
• Spec https://en.wikipedia.org/wiki/Netpbm_format

Examples with Std Lib only