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: