jsng is a JS encoder/decoder for the ever-popular and inefficient JSON-G format.

JSON-G (JSON-Graphics) is an extremely inefficient way to store raster image data, with transparency and layered support!

Using jsng allows you to combine the inefficiency and extensive features of JSON-G with the flexibility and ease-of-use of JavaScript, allowing you to seamlessly create and use JSON-G files wherever you are!

jsng is also the most efficient JSON-G library on the internet (as of 2017 February 15), outperforming any other encoder/decoder both in terms of speed and filesize.

• Support for an infinite number of layers
• Support for optional transparency
• Comment support for each individual pixel
• Incredibly large filesizes (approximately 400x bigger than equivalent PNGs)
• Human-readable formatting

npm install abalabahaha/jsng

The API is relatively simple, and has just two functions.

• file - a string pointing to a JPG or PNG file
• callback(err, jsng) - a callback function with the following parameters
  • err - an Error object, null if no error was encountered
  • jsng - an Object containing the JSON-G data for the image

• file - a string pointing to a JSNG file
• callback(err, jsng) - a callback function with the following parameters
  • err - an Error object, null if no error was encountered
  • buffer - a Buffer containing the JPG or PNG data for the image
  • mimeType - a String containing the MIME type of the image

See the examples folder for example decoder and encoder scripts.

• Roadcrosser/JSON-G (Python script)
• Gorialis/JSON-G (Python module)
• node-json-g (NodeJS module)
• PHP JSON-G (PHP)
• json-g.rs (Rust crate)
• See the official JSON-G library index for more

• JSON-G Specification