// npm install --save jimp

var Jimp = require("jimp");

// Example usage (Promise will never resolve if callback is passed):
// open a file called "lenna.png"
Jimp.read("lenna.png", (err, lenna) => {
    if (err) throw err;
    lenna
        .resize(256, 256) // resize
        .quality(60) // set JPEG quality
        .greyscale() // set greyscale
        .write("lena-small-bw.jpg"); // save
});

// Using promises:
Jimp.read("lenna.png")
    .then((lenna) => {
        return lenna
            .resize(256, 256) // resize
            .quality(60) // set JPEG quality
            .greyscale() // set greyscale
            .write("lena-small-bw.jpg"); // save
    })
    .catch((err) => {
        console.error(err);
    });


// Basic Usage
Jimp.read("./path/to/image.jpg")
    .then((image) => {
        // Do stuff with the image.
    })
    .catch((err) => {
        // Handle an exception.
    });

Jimp.read("http://www.example.com/path/to/lenna.jpg")
    .then((image) => {
        // Do stuff with the image.
    })
    .catch((err) => {
        // Handle an exception.
    });

Jimp.read(jimpInstance)
    .then((image) => {
        // Do stuff with the image.
    })
    .catch((err) => {
        // Handle an exception.
    });

Jimp.read(buffer)
    .then((image) => {
        // Do stuff with the image.
    })
    .catch((err) => {
        // Handle an exception.
    });