https://github.com/hughsk/png-chunks-extract

:mag: Extract the data chunks from a PNG file.
https://github.com/hughsk/png-chunks-extract

Last synced: 3 months ago
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:mag: Extract the data chunks from a PNG file.

• Host: GitHub
• URL: https://github.com/hughsk/png-chunks-extract
• Owner: hughsk
• License: mit
• Created: 2015-10-04T11:44:28.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2023-04-16T21:36:49.000Z (about 2 years ago)
• Last Synced: 2025-03-14T12:16:46.148Z (3 months ago)
• Language: JavaScript
• Homepage:
• Size: 146 KB
• Stars: 35
• Watchers: 4
• Forks: 9
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.md

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README

        
# png-chunks-extract

[![stable](http://badges.github.io/stability-badges/dist/stable.svg)](http://github.com/badges/stability-badges)

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](https://nodei.co/npm/png-chunks-extract.png)](https://www.npmjs.com/package/png-chunks-extract)

### `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:

``` javascript

[

  { 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](http://github.com/hughsk/png-chunks-extract/blob/master/LICENSE.md) for details.