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Node.js GM drawLine() Function

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The drawLine() function is an inbuilt function in the GraphicsMagick library which is used to draw the line with specified coordinates. The function returns the true value of success. 

Syntax:

drawLine( x0, y0, x1, y1 )

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

  • x0: This parameter stores the x-coordinate value of the initial point.
  • y0: This parameter stores the y-coordinate value of the initial point.
  • x1: This parameter stores the x-coordinate value of the final point.
  • y1: This parameter stores the y-coordinate value of the final point.

Return Value: This function returns the GraphicsMagick object. 

Original Image: 

 

Example 1: 

javascript




// Include gm library
const gm = require('gm').subClass({imageMagick: true});
 
// Import the image
gm('1.png')
 
// Set the color for the stroke
.stroke("#000000", 20)
 
// Invoke drawLine function with x0 as 100,
// y0 as 45, x1 as 100, y1 as 89, r0 as 50
// and r1 as 40
.drawLine(100, 30, 400, 80)
 
// Process and write the image
.write("drawLine1.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)
 
// Invoke drawLine function with
// x0 as 100, y0 as 45, x1 as 100,
// y1 as 200
.drawLine(100, 45, 100, 200)
 
// Invoke drawLine function with
// x0 as 100, y0 as 45, x1 as 500,
// y1 as 45
.drawLine(100, 45, 500, 45)
 
// Invoke drawLine function with
// x0 as 500, y0 as 45, x1 as 500,
// y1 as 200
.drawLine(500, 45, 500, 200)
 
// Call to drawText Function
.drawText(100, 280, "GeeksforGeeks!")
 
// Process and write the image
.write("drawLine1.png", function (err) {
    if (!err) console.log('done');
});


Output:

  

Reference:



Last Updated : 30 Mar, 2023
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