image-encode

Encode image data to a container: PNG, GIF, BMP, JPEG or TIFF. Uses set of encoders in node and Canvas2D in browser.

Usage

let encode = require('image-encode')

// create a file with chess pattern
fs.writeFileSync(
    'out.png',
    Buffer.from(encode([0,0,0,255, 255,255,255,255, 255,255,255,255, 0,0,0,255], [2, 2], 'png'))
)

API

let data = encode(pixels, shape?, format|options?)

Takes input pixels Array/TypedArray/ArrayBuffer/Buffer/ImageData, returns an ArrayBuffer with encoded data in target format, one of png, gif, tif, bmp, jpg.

options can provide:

• format or type, if not specified as a separate argument.
• shape or width/height, if not defined by pixels or as a separate argument.
• quality for JPG encoder.
• colors for palette size in GIF encoder.
• any other meta fields for encoders.

See also

• squoosh.app − best in class image compressing app.
• image-decode − decode image data from a format.
• image-equal − image data comparing tool.
• image-pixels − load or save pixel data from/to any source.
• image-save − save image pixels data to a target.
• image-type − detect input image data type.

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© 2018 Dmitry Yv. MIT License.