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Node.js | GM shade() Function
  • Last Updated : 14 Jan, 2020

The shade() function is an inbuilt function in the GraphicsMagick library which is used to shade the image using a distant light source. The function returns the true value on success.


shade( azimuthal angle, elevation angle )

Parameters: This function accept two parameters as mentioned above and described below:

  • azimuthal angle: This parameter stores the value of the azimuthal angle.
  • elevation angle: This parameter stores the value of the elevation angle.

Return Value: This function returns GraphicsMagick object with image added.

Original Image:


// Include gm library
var gm = require('gm');
// Import the image
// Set stroke color
// Set fill color
// Draw Rectangle using drawRectangle function
.drawRectangle(10, 2, 130, 30, 1, 2)
// Invoke shadefunction with azimuthal
// as 45 and elevation angle as 90
.shade(45, 90)
// Process and Write the image
.write("shade1.png", function (err) {
  if (!err) console.log('done');



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