Node.js GM scale() Function

The crop() function is an inbuilt function in the GraphicsMagick library that allows you to resize images. The function returns the true value on success.

Syntax:

crop(width, height)

Parameters: This function accepts two parameters as mentioned above and described below:

width: This parameter is used to specify the width from which the image is to be scaled.
height: This parameter is used to specify the height from which the image is to be scaled.

Return Value: This function returns the GraphicsMagick object.

Example 1:

javascript

// Include gm library
const gm = require('gm');
 
// Import the image
gm('1.png')
 
// Invoke scale function
.scale(130, 230)
 
// Process and Write the image
.write("scale1.png", function (err) {
      if (!err) console.log('done');
});

Output:

Example 2:

javascript

// Include gm library
const gm = require('gm');
 
// Import the image
gm(600, 300, 'white')
 
// Set the color for the stroke
.stroke("green", 3)
 
// Set the font 
.font("Helvetica.ttf", 60)
 
// Call to drawText Function
.drawText(100, 280, "w3wiki!")
 
// Invoke borderColor() function
// and set border color to green
.borderColor("Green")
 
// Invoke border function
.border(62, 32)
 
// Invoke gaussian function
.scale(300, 200)
 
// Process and Write the image
.write("scale2.png", function (err) {
      if (!err) console.log('done');
});

Output:

Reference:

http://www.graphicsmagick.org/GraphicsMagick.html#details-scale
https://www.npmjs.com/package/gm

javascript

javascript

Contact Us