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Node.js GM drawEllipse() Function

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

Syntax:

drawEllipse( x0, y0, x1, y1, r0, r1 )

Parameters: This function accepts six 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.
  • r0: This parameter stores the x-radius value of the ellipse.
  • r1: This parameter stores the y-radius value of the ellipse.

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("#ffffff")
 
// Invoke drawEllipse function with
// x0 as 230, y0 as 45, x1 as 100,
// y1 as 89, r0 as 50 and r1 as 40
.drawEllipse(230, 45, 300, 89, 50, 40)
 
// Process and write the image
.write("drawEllipse1.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 drawEllipse function with x0
// as 230, y0 as 45, x1 as 100, y1 as
// 89, r0 as 50 and r1 as 40
.drawEllipse(290, 15, 300, 210, 20, 160)
 
// Process and write the image
.write("drawEllipse1.png", function (err) {
    if (!err) console.log('done');
});


Output:

  

Reference:



Last Updated : 29 Mar, 2023
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