Node Jimp | rotate

The rotate() function is an inbuilt function in Nodejs | Jimp that rotates the image clockwise and the dimensions of the image remain the same.

Syntax:

rotate(r, mode, cb)

Parameter:

• r: This parameter stores the rotation angle for the image.
• mode: This is an optional parameter that stores the scaling method.
• cb: This is an optional parameter that is invoked when compilation is complete.

Input Images:

Step 1: Setting up the environment 

npm init -y

Step 2: Install jimp

npm install jimp --save

Example 1: In this example, we will see how to rotate the image.

javascript

// npm install --save jimp
// import jimp library to the environment
const Jimp = require('jimp');

// User-Defined Function to read the images
async function main() {
    const image = await Jimp.read(
'https://media.geeksforgeeks.org/wp-content/uploads/20190328185307/gfg28.png');

    // rotate Function having a rotation as 55
    image.rotate(55)
        .write('rotate1.png');
}

main();
console.log("Image Processing Completed");

Output:

Example 2: With mode and cb (optional parameters)

javascript

// npm install --save jimp
// import jimp library to the environment
const Jimp = require('jimp');

// User-Defined Function to read the images
async function main() {
    const image = await Jimp.read(
'https://media.geeksforgeeks.org/wp-content/uploads/20190328185333/gfg111.png');

    // rotate Function having rotation angle as 99, mode and callback function
    image.rotate(99, Jimp.RESIZE_BEZIER, function (err) {
        if (err) throw err;
    })
        .write('rotate2.png');
}

main();
console.log("Image Processing Completed");

Output:

Reference: https://www.npmjs.com/package/jimp