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, "GeeksforGeeks!")

// 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