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Node.js GM drawPolygon() Function

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

Syntax:

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

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

Return Value: This function returns the GraphicsMagick object. 

Example 1: 

javascript




// Include gm library
const gm = require('gm');
 
// Import the image
gm(500, 200, 'white')
 
// Set the color for the stroke
.stroke("green", 3)
 
// Set font as 'Helvetica'
.font("Helvetica.ttf", 60)
 
// Use drawText() Function
.drawText(30, 160, "GeeksforGeeks!")
 
// Invoke drawPolygon function
// with array of points
.drawPolygon([12, 60], [45, 79],
             [80, 120], [300, 32], [300, 98])
 
// Process and write the image
.write("drawPolygon1.png", function (err) {
    if (!err) console.log('done');
});


Output:

  

Example 2: 

javascript




// Include gm library
const gm = require('gm');
 
// Import the image
 
// Set the color for the stroke
.stroke("#000000", 5)
 
// Invoke drawPolygon function with array of points
.drawPolygon([12, 60], [45, 79], [80, 120], [300, 32])
 
// Process and write the image
.write("drawPolygon1.png", function (err) {
    if (!err) console.log('done');
});


Output:

  

Reference:



Last Updated : 30 Mar, 2023
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