Skip to content
Related Articles

Related Articles

Nodejs | GM drawPolyline() Function
  • Last Updated : 05 Mar, 2020
GeeksforGeeks - Summer Carnival Banner

The drawPolyline() function is an inbuilt function in the GraphicsMagick library which is used to draw polyline with specified coordinates. The function returns the true value on success.

Syntax:

drawPolyline( [x0, y0], ..., [xn, yn] )

Parameters: This function accepts the array of x and y coordinates.

Return Value: This function returns the GraphicsMagick object.

Original Image:



Example 1:




// Include gm library
var gm = require('gm').subClass({imageMagick: true});
  
// Import the image
gm('1.png')
  
// Set the color for the stroke
.stroke("#000000")
  
// Invoke drawPolyline function with array of points
.drawPolyline([12, 60], [45, 79], [80, 120], [300, 32])
  
// Process and write the image 
.write("drawPolyline1.png", function (err) {
  if (!err) console.log('done');
});

Output:

Example 2:




// Include gm library
var 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)
  
// Invoke drawPolyline function with
// array of points
.drawPolyline([12, 60], [45, 79], [80, 120],
          [300, 32], [400, 150], [500, 200])
  
// Call to drawText Function
.drawText(100, 280, "GeeksforGeeks!")
  
// Process and write the image 
.write("drawPolyline1.png", function (err) {
  if (!err) console.log('done');
});

Output:

Reference:

Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.

My Personal Notes arrow_drop_up
Recommended Articles
Page :