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png-chunks-extract

v1.0.0

Published

Extract the data chunks from a PNG file

Downloads

86,752

Vulnerabilities

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Links

Git

Maintainers

hughskhughsk

Keywords

png,parse,extract,chunks,metadata,IHDR,image,hide,text,IEND,format,read

Readme

png-chunks-extract

stable

Extract the data chunks from a PNG file.

Useful for reading the metadata of a PNG image, or as the base of a more complete PNG parser.

Usage

NPM

chunks = extract(data)

Takes the raw image file data as a Uint8Array or Node.js Buffer, and returns an array of chunks. Each chunk has a name and data buffer:

[
  { name: 'IHDR', data: Uint8Array([...]) },
  { name: 'IDAT', data: Uint8Array([...]) },
  { name: 'IDAT', data: Uint8Array([...]) },
  { name: 'IDAT', data: Uint8Array([...]) },
  { name: 'IDAT', data: Uint8Array([...]) },
  { name: 'IEND', data: Uint8Array([]) }
]

License

MIT, see LICENSE.md for details.