resolves #153 (#180)

Signed-off-by: tech4GT <varun.gupta1798@gmail.com>

src/modules/_nomodule/PixelManipulation.js

@@ -1,9 +1,9 @@
 /*
- * General purpose per-pixel manipulation
- * accepting a changePixel() method to remix a pixel's channels
- */
+* General purpose per-pixel manipulation
+* accepting a changePixel() method to remix a pixel's channels
+*/
 module.exports = function PixelManipulation(image, options) {
-
+  
   options = options || {};
   options.changePixel = options.changePixel || function changePixel(r, g, b, a) {
     return [r, g, b, a];
@@ -11,51 +11,58 @@ module.exports = function PixelManipulation(image, options) {
   options.extraManipulation = options.extraManipulation||function extraManipulation(pixels){
     return pixels;
   }
-
+  
   var getPixels = require('get-pixels'),
-      savePixels = require('save-pixels');
-
+  savePixels = require('save-pixels');
+  
   getPixels(image.src, function(err, pixels) {
-
+    
     if(err) {
       console.log('Bad image path');
       return;
     }
-
+    
     // iterate through pixels;
     // this could possibly be more efficient; see
     // https://github.com/p-v-o-s/infragram-js/blob/master/public/infragram.js#L173-L181
+    
+    if(!options.inBrowser)
+    var pace = require('pace')((pixels.shape[0] * pixels.shape[1]))
+    
     for(var x = 0; x < pixels.shape[0]; x++) {
       for(var y = 0; y < pixels.shape[1]; y++) {
-
+        
         var pixel = options.changePixel(
           pixels.get(x, y, 0),
           pixels.get(x, y, 1),
           pixels.get(x, y, 2),
           pixels.get(x, y, 3)
         );
-
+        
         pixels.set(x, y, 0, pixel[0]);
         pixels.set(x, y, 1, pixel[1]);
         pixels.set(x, y, 2, pixel[2]);
         pixels.set(x, y, 3, pixel[3]);
-
+        
+        if(!options.inBrowser)
+        pace.op()
       }
     }
 
-    pixels = options.extraManipulation(pixels)
-
+    if(options.extraManipulation)
+      pixels = options.extraManipulation(pixels)
+    
     // there may be a more efficient means to encode an image object,
     // but node modules and their documentation are essentially arcane on this point
     var chunks = [];
     var totalLength = 0;
     var r = savePixels(pixels, options.format, {quality: 100});
-
+    
     r.on('data', function(chunk){
       totalLength += chunk.length;
       chunks.push(chunk);
     });
-
+    
     r.on('end', function(){
       var data = Buffer.concat(chunks, totalLength).toString('base64');
       var datauri = 'data:image/' + options.format + ';base64,' + data;