png

🖼A full-featured PNG decoder and encoder. Fork of @vivaxy/png maintained as of Feb 2023.

Supports

• Environments: Browsers and Node.js
• Chunks: IHDR, PLTE, IDAT, IEND, tRNS, cHRM, gAMA, iCCP, sBIT, sRGB, tEXt, zTXt, iTXt, bKGD, hIST, pHYs, sPLT, tIME
• Color Types: Greyscale, Truecolour, Indexed-colour (Palette), Greyscale with alpha, Truecolour with alpha
• Bit Depths: 1, 2, 4, 8, 16
• Filters: None, Sub, Up, Average, Paeth

Install

yarn add @stevebel/png or npm i @stevebel/png

Usage

import * as png from '@stevebel/png';

const metadata = png.decode(imageBuffer);
const imageBuffer = png.encode(metadata);

See metadata type definition in metadata.ts.

Articles

• Decoding A PNG Image with JavaScript Step by Step 中文版：一步一步解码 PNG 图片

Prior Art

• PngSuite - the official set of PNG test images
• upng-js
• PNGjs-Image
• fast-png
• pngparse-sync
• pngjs3
• pngjs
• png-js

Project created by create-n.