1. module image-watermark
   1. function image-watermark.embedWatermark (source, options)
   2. function image-watermark.embedWatermarkWithCb (source, options, callback)
   3. string image-watermark.version

module image-watermark

function image-watermark.embedWatermark (source, options)

• description and source-code

  function embedWatermark(source, options) {
  
  	if (!source || source == '')
  		throw new Error('Image-Watermark::embedWatermark : Specified an invalid image source');
  
  	// Check if file exists at the specified path
  	stats = fs.lstatSync(source);
  
  	if (!stats.isFile())
  		throw new Error('Image-Watermark::embedWatermark : Image does not exists at : ' + source);		
  
  	// If options are not properly specified, use default options
  	if (!options || typeof options !== 'object')
  		options = defaultOptions;
  
  	// If we reach here that means file exists
  	im.identify(source, function (err, imageData) {
  	  if (err)
  	  	throw new Error('Image-Watermark::embedWatermark : Unable to process image file : ' + err);
  
  	  var retObj = _parseOptions(imageData, source, options);
  
  	  im.convert(retObj.args, function(err, stdout) {
  	  	if (err)
  	    	console.log('Image-Watermark::embedWatermark : Error in applying watermark : ' + err);
  	    else
  	      	console.log('Image-Watermark::embedWatermark : Successfully applied watermark. Please check it at :\n ' + retObj.outputPath
  );
  	  });
  	});
  }

• example usage

  ...
  	'npm install image-watermark'
  
  ### Server-side usage
  
  ```javascript
  var watermark = require('image-watermark');
  
  watermark.embedWatermark('/path/to/image_or_pdf/file', [options]);
  ```
  
  ### Clone the repo
  
  git clone https://github.com/luthraG/image-watermark.git
  
  ### API
  ...

function image-watermark.embedWatermarkWithCb (source, options, callback)

• description and source-code

  function embedWatermarkWithCb(source, options, callback) {
  
  	var error;
  	
  	if ((arguments.length < 2) ||
  		(arguments.length === 2 && !ratify.isFunction(arguments[1])) ||
  		(arguments.length > 2 && !ratify.isFunction(arguments[2]))) {
  		throw new Error('Image-Watermark::embedWatermarkWithCb : Invalid arguments to method embedWatermarkWithCb');
  	} else if (arguments.length === 2 && ratify.isFunction(arguments[1])) {
  		callback = arguments[1];
  		options = null;
  	}
  
  	if (!source || source == '') {
  		error = new Error('Image-Watermark::embedWatermarkWithCb : Specified an invalid image source');
  		return callback(error);
  	}
  
  	// Check if file exists at the specified path
  	fs.lstat(source, function(err, stats) {
  		if (err || !stats.isFile()) {
  			error = new Error('Image-Watermark::embedWatermarkWithCb : Image file doesn\'t exists at ' + source);
  			return callback(error);
  		} else if (!err) {
  
  			// If options are not properly specified, use default options
  			if (!options || typeof options !== 'object')
  				options = defaultOptions;
  
  			// If we reach here that means file exists
  			im.identify(source, function (err, imageData) {
  				if (err) {
  			  		error = new Error('Image-Watermark::embedWatermarkWithCb : Unable to process image file : ' + err);
  			  		return callback(error);
  			  	}
  
  			  	var retObj = _parseOptions(imageData, source, options);
  
  		        im.convert(retObj.args, function(err, stdout) {
  		            if (err) {
  		            	error = new Error('Image-Watermark::embedWatermarkWithCb : Error in applying watermark : ' + err);
  		            	return callback(error);
  		            } else {
  		            	console.log('Image-Watermark::embedWatermarkWithCb : Successfully applied watermark. Please check it at :\n ' + retObj
  .outputPath);
  		            	return callback(null);
  		            }
  		        });
  			});
  		}
  	});
  	
  	return;
  }

• example usage

  ...
  
  ```javascript
  
  // Embed watermark with option object and callback method
  var watermark = require('image-watermark');
  var option = {'text' : 'sample watermark'};
  
  watermark.embedWatermarkWithCb('\home\user\sample.jpg', option, function(err
  ) {
  	if (!err)
  		console.log('Succefully embeded watermark');
  });
  
  // Embed watermark with no option object and callback method
  var watermark = require('image-watermark');
  ...