How to mask an image with another b/w image in NodeJS?

Question

So I want to mask this image

with this image

which will result in this image

How to do this in NodeJS?

Answer 1

This can be pretty easy. We just need to use the JIMP package for NodeJS. We can output the image as a file or a buffer to use in canvas too.

var Jimp = require('jimp');
Jimp.read(image_1,(err, image) => {
  Jimp.read(image_2,(err1,image1) => {
    image1.resize(image.bitmap.width,image.bitmap.height)
    image.mask(image1,0,0)
    image.write(output_image) //for a file output

//for buffer output
    image.getBufferAsync('image/png'); //for transparent image use image/png
  })
})