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Node.js GM drawArc() Function

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

Syntax:

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

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

  • x0: This parameter stores the value of the x-coordinate of the initial point.
  • y0: This parameter stores the value of the y-coordinate of the initial point.
  • x1: This parameter stores the value of the x-coordinate of the final point.
  • y1: This parameter stores the value of the y-coordinate of the final point.
  • r0: This parameter takes the value of starting angle of rotation in degrees.
  • r1: This parameter takes the value of the ending angle of rotation in degrees.

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 drawArc function with x0, y0, x1, y1, r0, r1
.drawArc(30, 20, 390, 70, 140, 110)
 
// Process and write the image
.write("drawArc1.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 drawArc function with x0, y0, x1, y1, r0, r1
.drawArc(30, 20, 390, 110, 240, 210)
 
// Call to drawText Function
.drawText(100, 280, "GeeksforGeeks!")
 
// Process and write the image
.write("drawArc1.png", function (err) {
    if (!err) console.log('done');
});


Output:

  

Reference:



Last Updated : 29 Mar, 2023
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