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Node.js GM drawPolygon() Function

  • Last Updated : 12 Oct, 2021

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






// Include gm library
var 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:




// Include gm library
var 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:




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