Node.js GM swirl() Function
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'); }); |
Output:
Reference:
- http://www.graphicsmagick.org/GraphicsMagick.html#details-swirl
- https://www.npmjs.com/package/gm