electron-canvas-to-buffer v2.0.0

electron-canvas-to-buffer

With Electron, turns a Canvas element into a Node Buffer.

This module uses Electron built-ins (native-image), so it is only useful within that environment.

Example

var canvasBuffer = require('electron-canvas-to-buffer')
var fs = require('fs')

// your canvas drawing
var canvas = document.createElement('canvas')
var context = canvas.getContext('2d')
context.fillRect(0, 0, 50, 50)
context.fillStyle = 'red'
context.fillRect(50, 10, 30, 20)

// as a buffer
var buffer = canvasBuffer(canvas, 'image/png')

// write canvas to file
fs.writeFile('image.png', buffer, function (err) {
  throw err
})

You can run the above source through an Electron app with node-integration enabled. It should also work with chromeo (still experimental):

chromeo index.js

Install

npm install electron-canvas-to-buffer --save

Usage

buf = canvasBuffer(canvas, [type], [quality])

Returns a Buffer representing the specified canvas element. Parameters:

• type (String) either "image/png" (default) or "image/jpeg"
• quality (Number) for JPG, decides the encoding quality (default 0.9)

License

MIT, see LICENSE.md for details.