Nodejs | GM drawPolyline() Function
The drawPolyline() function is an inbuilt function in the GraphicsMagick library which is used to draw polyline with specified coordinates. The function returns the true value on success.
Syntax:
drawPolyline( [x0, y0], ..., [xn, yn] )
Parameters: This function accepts the array of x and y coordinates.
Return Value: This function returns the GraphicsMagick object.
Original Image:
Example 1:
// Include gm libraryvar gm = require('gm').subClass({imageMagick: true}); // Import the imagegm('1.png') // Set the color for the stroke.stroke("#000000") // Invoke drawPolyline function with array of points.drawPolyline([12, 60], [45, 79], [80, 120], [300, 32]) // Process and write the image .write("drawPolyline1.png", function (err) { if (!err) console.log('done');}); |
Output:
Example 2:
// Include gm libraryvar gm = require('gm'); // Import the imagegm(600, 300, 'white') // set the color for the stroke.stroke("green", 3) // Set the font .font("Helvetica.ttf", 60) // Invoke drawPolyline function with// array of points.drawPolyline([12, 60], [45, 79], [80, 120], [300, 32], [400, 150], [500, 200]) // Call to drawText Function.drawText(100, 280, "GeeksforGeeks!") // Process and write the image .write("drawPolyline1.png", function (err) { if (!err) console.log('done');}); |
Output:
Reference:
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