Node.js GM swirl() Function

Last Updated : 30 Mar, 2023

The swirl() function is an inbuilt function in the GraphicsMagick library which is used around the center of the image. The degrees specify the tightness of the swirl.

Syntax:

swirl( angle )

Parameters: This function accepts a single parameter which is mentioned above and described below:

angle: This parameter stores the angle of the swirl.

Return Value: This function returns the GraphicsMagick swirl image.

Original Image:

Example 1:

javascript

// Include gm library
const gm = require('gm');
 
// Import the image
gm('1.png')
 
// Invoke swirl function with
// an angle values as 45
.swirl(45)
 
// Process and Write the image
.write("swirl1.png", function (err) {
    if (!err) console.log('done');
});

Output:

Example 2:

javascript

// Include gm library
const gm = require('gm');
 
// Import the image
gm('1.png')
 
// Set stroke color
.stroke("#fe1232")
 
// Set fill color
.fill("#1200ff")
 
// Draw Rectangle using drawRectangle function
.drawRectangle(10, 2, 130, 30, 1, 2)
 
// Invoke swirl function with
// an angle value as -270
.swirl(-270)
 
// Process and Write the image
.write("swirl2.png", function (err) {
    if (!err) console.log('done');
});