node-randombase64

Installation

Since this module uses famous node-canvas module, you will need to install Cairo on your machine, so please follow install instructions at node-canvas

Usage

randombase64.generate(options, callback)

options

• width width of generated image, default: 300
• height height of generated image, default: 300
• minWidth generates random width between minWidth and maxWidth
• minHeight generates random width between minHeight and maxHeight
• maxWidth
• maxHeight
• opacity opacity of a image (between 0-1), default: 1
• unitSize pixel size of one noise rectangle. Increase this number to reduce image size. default: 3
• blackAndWhite use only black and white colors, default : false
• type Type of generated image, default : 'image/png'
• withPrefix whether to include image type prefix into generated string e.g. 'data:image/png;base64,', default: false

callback (optional)

Note: When callback is passed function generates base64 string asynchronously, when callback is not passed function return string synchronously.

Examples

var base64str1 = randombase64.generate({
    withPrefix : true,
    unitSize   : 1
  });

  var base64str2 = randombase64.generate({
    height     : 700,
    width      : 850,
    unitSize   : 10,
    withPrefix : true
  });

  var base64str3 = randombase64.generate({
    minHeight     : 100,
    minWidth      : 50,
    maxHeight     : 800,
    maxWidth      : 800,
    blackAndWhite : true,
    unitSize      : 4,
    withPrefix    : true
  });

  randombase64.generate({
    opacity : 0.5
  }, function(err, str) {
        var base64str4 = str;
  });