Pixel set redundancy removed (#1188)

* Pixels.set Redundancy removed

* eslint fixes

* move require to top with const

src/modules/AddQR/QR.js

@@ -1,4 +1,6 @@
 module.exports = exports = function (options, pixels, oldPixels, callback) {
+  const pixelSetter = require('../../util/pixelSetter.js');
+
   var QRCode = require('qrcode');
   QRCode.toDataURL(options.qrCodeString, function (err, url) {
     var getPixels = require('get-pixels');
@@ -26,17 +28,11 @@ module.exports = exports = function (options, pixels, oldPixels, callback) {
       for (var m = 0; m < width; m++) {
         for (var n = 0; n < height; n++) {
           if (m >= xe && n >= ye) {
-            pixels.set(m, n, 0, qrPixels.get(m - xe, n - ye, 0));
-            pixels.set(m, n, 1, qrPixels.get(m - xe, n - ye, 1));
-            pixels.set(m, n, 2, qrPixels.get(m - xe, n - ye, 2));
-            pixels.set(m, n, 3, qrPixels.get(m - xe, n - ye, 3));
+            pixelSetter(m, n, [qrPixels.get(m - xe, n - ye, 0), qrPixels.get(m - xe, n - ye, 1), qrPixels.get(m - xe, n - ye, 2), qrPixels.get(m - xe, n - ye, 3)], pixels);
           }
 
           else {
-            pixels.set(m, n, 0, oldPixels.get(m, n, 0));
-            pixels.set(m, n, 1, oldPixels.get(m, n, 1));
-            pixels.set(m, n, 2, oldPixels.get(m, n, 2));
-            pixels.set(m, n, 3, oldPixels.get(m, n, 3));
+            pixelSetter(m, n, [qrPixels.get(m, n, 0), qrPixels.get(m, n, 1), qrPixels.get(m, n, 2), qrPixels.get(m, n, 3)], pixels);
           }
 
         }

src/modules/Blur/Blur.js

@@ -1,4 +1,6 @@
 module.exports = exports = function(pixels, blur) {
+  const pixelSetter = require('../../util/pixelSetter.js');
+
   let kernel = kernelGenerator(blur),
     pixs = {
       r: [],
@@ -24,9 +26,10 @@ module.exports = exports = function(pixels, blur) {
 
   for (let y = 0; y < pixels.shape[1]; y++){
     for (let x = 0; x < pixels.shape[0]; x++){
-      pixels.set(x, y, 0, Math.max(0, Math.min(conPix[0][y][x], 255)));
-      pixels.set(x, y, 1, Math.max(0, Math.min(conPix[1][y][x], 255)));
-      pixels.set(x, y, 2, Math.max(0, Math.min(conPix[2][y][x], 255)));
+      var pixelvalue = [Math.max(0, Math.min(conPix[0][y][x], 255)),
+        Math.max(0, Math.min(conPix[1][y][x], 255)),
+        Math.max(0, Math.min(conPix[2][y][x], 255))];
+      pixelSetter(x, y, pixelvalue, pixels);
     }
   }
 

src/modules/CanvasResize/Module.js

@@ -4,10 +4,10 @@
 module.exports = function canvasResize(options, UI) {
 
   var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  const pixelSetter = require('../../util/pixelSetter.js');
+
   var output;
 
-
-
   function draw(input, callback, progressObj) {
 
     options.width = parseInt(options.width || defaults.width);
@@ -21,16 +21,15 @@ module.exports = function canvasResize(options, UI) {
     var step = this;
 
     function extraManipulation(pixels) {
+
       let newPixels = require('ndarray')(new Uint8Array(4 * options.width * options.height).fill(0), [options.width, options.height, 4]);
       let iMax = options.width - options.x,
         jMax = options.height - options.y;
       for (let i = 0; i < iMax && i < pixels.shape[0]; i++) {
         for (let j = 0; j < jMax && j < pixels.shape[1]; j++) {
           let x = i + options.x, y = j + options.y;
-          newPixels.set(x, y, 0, pixels.get(i, j, 0));
-          newPixels.set(x, y, 1, pixels.get(i, j, 1));
-          newPixels.set(x, y, 2, pixels.get(i, j, 2));
-          newPixels.set(x, y, 3, pixels.get(i, j, 3));
+          pixelSetter(x, y, [pixels.get(i, j, 0), pixels.get(i, j, 1), pixels.get(i, j, 2), pixels.get(i, j, 3)], newPixels);
+                
         }
       }
       return newPixels;

src/modules/ColorTemperature/Module.js

@@ -1,4 +1,6 @@
 module.exports = function ColorTemperature(options, UI) {
+  
+  const pixelSetter = require('../../util/pixelSetter.js');
 
   var output;
 
@@ -38,17 +40,12 @@ module.exports = function ColorTemperature(options, UI) {
       for (let i = 0; i < pixels.shape[0]; i++) {
         for (let j = 0; j < pixels.shape[1]; j++) {
 
-          r_data = pixels.get(i, j, 0);
-          r_new_data = (255 / r) * r_data;
-          pixels.set(i, j, 0, r_new_data);
+          var rgbdata = [pixels.get(i, j, 0), pixels.get(i, j, 1), pixels.get(i, j, 2)];
+          rgbdata[0] = (255 / r) * rgbdata[0];
+          rgbdata[1] = (255 / g) * rgbdata[1];
+          rgbdata[2] = (255 / b) * rgbdata[2];
+          pixelSetter(i, j, rgbdata, pixels);
 
-          g_data = pixels.get(i, j, 1);
-          g_new_data = (255 / g) * g_data;
-          pixels.set(i, j, 1, g_new_data);
-
-          b_data = pixels.get(i, j, 2);
-          b_new_data = (255 / b) * b_data;
-          pixels.set(i, j, 2, b_new_data);
         }
       }
 

src/modules/Contrast/Contrast.js

@@ -1,4 +1,5 @@
 var _ = require('lodash');
+const pixelSetter = require('../../util/pixelSetter.js');
 
 module.exports = exports = function(pixels, contrast) {
   let oldpix = _.cloneDeep(pixels);
@@ -10,37 +11,19 @@ module.exports = exports = function(pixels, contrast) {
 
   for (let i = 0; i < pixels.shape[0]; i++) {
     for (let j = 0; j < pixels.shape[1]; j++) {
-      var r = oldpix.get(i, j, 0) / 255.0;
-      r -= 0.5;
-      r *= contrast;
-      r += 0.5;
-      r *= 255;
-      if (r < 0) r = 0;
-      if (r > 255) r = 255;
-
-
-      var g = oldpix.get(i, j, 1) / 255.0;
-      g -= 0.5;
-      g *= contrast;
-      g += 0.5;
-      g *= 255;
-      if (g < 0) g = 0;
-      if (g > 255) g = 255;
-
-
-      var b = oldpix.get(i, j, 2) / 255.0;
-      b -= 0.5;
-      b *= contrast;
-      b += 0.5;
-      b *= 255;
-      if (b < 0) b = 0;
-      if (b > 255) b = 255;
-
-
-      pixels.set(i, j, 0, r);
-      pixels.set(i, j, 1, g);
-      pixels.set(i, j, 2, b);
-
+            
+      var rgbarray = [oldpix.get(i, j, 0) / 255.0, oldpix.get(i, j, 1) / 255.0, oldpix.get(i, j, 2) / 255.0];
+      for(var idx = 0;idx < 3;idx++){
+        rgbarray[idx] -= 0.5;
+        rgbarray[idx] *= contrast;
+        rgbarray[idx] += 0.5;
+        rgbarray[idx] *= 255;
+        if (rgbarray[idx] < 0) rgbarray[idx] = 0;
+        if (rgbarray[idx] > 255) rgbarray[idx] = 255;
+      }
+            
+      pixelSetter(i, j, rgbarray, pixels);
+            
     }
   }
   return pixels;

src/modules/Convolution/Convolution.js

@@ -1,4 +1,6 @@
 var _ = require('lodash');
+const pixelSetter = require('../../util/pixelSetter.js');
+
 module.exports = exports = function(pixels, constantFactor, kernelValues, texMode) {
   let kernel = kernelGenerator(constantFactor, kernelValues),
     pixs = {
@@ -24,9 +26,8 @@ module.exports = exports = function(pixels, constantFactor, kernelValues, texMod
 
   for (let y = 0; y < pixels.shape[1]; y++){
     for (let x = 0; x < pixels.shape[0]; x++){
-      pixels.set(x, y, 0, Math.max(0, Math.min(conPix[0][y][x], 255)));
-      pixels.set(x, y, 1, Math.max(0, Math.min(conPix[1][y][x], 255)));
-      pixels.set(x, y, 2, Math.max(0, Math.min(conPix[2][y][x], 255)));
+      var value = [Math.max(0, Math.min(conPix[0][y][x], 255)), Math.max(0, Math.min(conPix[1][y][x], 255)), Math.max(0, Math.min(conPix[2][y][x], 255))];
+      pixelSetter(x, y, value, pixels);
     }
   }
 

src/modules/DrawRectangle/DrawRectangle.js

@@ -1,5 +1,6 @@
 module.exports = exports = function(pixels, options){
   var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  const pixelSetter = require('../../util/pixelSetter.js');
 
   options.startingX = options.startingX || defaults.startingX;
   options.startingY = options.startingY || defaults.startingY;
@@ -17,10 +18,8 @@ module.exports = exports = function(pixels, options){
   var drawSide = function(startX, startY, endX, endY){
     for (var n = startX; n <= endX + thickness; n++){
       for (var k = startY; k <= endY + thickness; k++){
-        pixels.set(n, k, 0, color[0]);
-        pixels.set(n, k, 1, color[1]);
-        pixels.set(n, k, 2, color[2]);
-        //pixels.set(n, k, 3, color[3]);
+
+        pixelSetter(n, k, color, pixels); //to remove 4th channel - pixels.set(n, k, 3, color[3]);
       }
     }
   };

src/modules/EdgeDetect/EdgeUtils.js

@@ -1,4 +1,6 @@
 // Define kernels for the sobel filter
+
+const pixelSetter = require('../../util/pixelSetter.js');
 const kernelx = [
     [-1, 0, 1],
     [-2, 0, 2],
@@ -41,19 +43,14 @@ module.exports = function(pixels, highThresholdRatio, lowThresholdRatio, useHyst
   return pixels;
 };
 
-
 function supress(pixels, pixel) {
-  pixels.set(pixel[0], pixel[1], 0, 0);
-  pixels.set(pixel[0], pixel[1], 1, 0);
-  pixels.set(pixel[0], pixel[1], 2, 0);
-  pixels.set(pixel[0], pixel[1], 3, 255);
+  pixelSetter(pixel[0], pixel[1], [0, 0, 0, 255], pixels);
+
 }
 
 function preserve(pixels, pixel) {
-  pixels.set(pixel[0], pixel[1], 0, 255);
-  pixels.set(pixel[0], pixel[1], 1, 255);
-  pixels.set(pixel[0], pixel[1], 2, 255);
-  pixels.set(pixel[0], pixel[1], 3, 255);
+  pixelSetter(pixel[0], pixel[1], [255, 255, 255, 255], pixels);
+
 }
 
 // sobelFilter function that convolves sobel kernel over every pixel

src/modules/FlipImage/flipImage.js

@@ -1,12 +1,12 @@
 module.exports = function flipImage(oldPixels, pixels, axis) {
+  const pixelSetter = require('../../util/pixelSetter.js');
+
   var width = oldPixels.shape[0],
     height = oldPixels.shape[1];
   
   function copyPixel(x1, y1, x2, y2){
-    pixels.set(x1, y1, 0, oldPixels.get(x2, y2, 0));
-    pixels.set(x1, y1, 1, oldPixels.get(x2, y2, 1));
-    pixels.set(x1, y1, 2, oldPixels.get(x2, y2, 2));
-    pixels.set(x1, y1, 3, oldPixels.get(x2, y2, 3));
+    pixelSetter(x1, y1, [oldPixels.get(x2, y2, 0), oldPixels.get(x2, y2, 1), oldPixels.get(x2, y2, 2), oldPixels.get(x2, y2, 3)], pixels);
+    
   }
 
   function flip(){

src/modules/Gradient/Module.js

@@ -1,9 +1,11 @@
 module.exports = function Invert(options, UI) {
+  const pixelSetter = require('../../util/pixelSetter.js');
 
   var output;
 
   // The function which is called on every draw.
-  function draw(input, callback, progressObj) {
+  function draw(input, callback) {
+
     var getPixels = require('get-pixels');
     var savePixels = require('save-pixels');
 
@@ -21,10 +23,8 @@ module.exports = function Invert(options, UI) {
       for (var i = 0; i < pixels.shape[0]; i++) {
         for (var j = 0; j < pixels.shape[1]; j++) {
           let val = (i / width) * 255;
-          pixels.set(i, j, 0, val);
-          pixels.set(i, j, 1, val);
-          pixels.set(i, j, 2, val);
-          pixels.set(i, j, 3, 255);
+          pixelSetter(i, j, [val, val, val, 255], pixels);
+                
         }
       }
       var chunks = [];

src/modules/GridOverlay/GridOverlay.js

@@ -1,5 +1,6 @@
 module.exports = exports = function(pixels, options){
   var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  const pixelSetter = require('../../util/pixelSetter.js');
 
   options.x = Number(options.x) || defaults.x;
   options.y = Number(options.y) || defaults.y;
@@ -9,19 +10,15 @@ module.exports = exports = function(pixels, options){
 
   for(var x = 0; x < pixels.shape[0]; x += options.x){
     for(var y = 0 ; y < pixels.shape[1]; y++){
-      pixels.set(x, y, 0, color[0]);
-      pixels.set(x, y, 1, color[1]);
-      pixels.set(x, y, 2, color[2]);
-      //pixels.set(x, y, 3, color[3]);
+      pixelSetter(x, y, color, pixels); // to remove 4th channel - pixels.set(x, y, 3, color[3]);
+                
     }
   }
     
   for(var y = 0; y < pixels.shape[1]; y += options.y){
     for(var x = 0 ; x < pixels.shape[0]; x++){
-      pixels.set(x, y, 0, color[0]);
-      pixels.set(x, y, 1, color[1]);
-      pixels.set(x, y, 2, color[2]);
-      //pixels.set(x, y, 3, color[3]);
+      pixelSetter(x, y, color, pixels); // to remove 4th channel - pixels.set(x, y, 3, color[3]);
+
     }
   }
 

src/modules/Histogram/Module.js

@@ -7,7 +7,9 @@ module.exports = function Channel(options, UI) {
 
   function draw(input, callback, progressObj) {
 
-    var defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+    const defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+    const pixelSetter = require('../../util/pixelSetter.js');
+
     options.gradient = options.gradient || defaults.gradient;
     options.gradient = JSON.parse(options.gradient);
 
@@ -32,10 +34,8 @@ module.exports = function Channel(options, UI) {
 
       for (let x = 0; x < 256; x++) {
         for (let y = 0; y < 256; y++) {
-          pixels.set(x, y, 0, 255);
-          pixels.set(x, y, 1, 255);
-          pixels.set(x, y, 2, 255);
-          pixels.set(x, y, 3, 255);
+          pixelSetter(x, y, [255, 255, 255, 255], pixels);
+
         }
       }
 
@@ -43,9 +43,8 @@ module.exports = function Channel(options, UI) {
       if (options.gradient) {
         for (let x = 0; x < 256; x++) {
           for (let y = 0; y < 10; y++) {
-            pixels.set(x, 255 - y, 0, x);
-            pixels.set(x, 255 - y, 1, x);
-            pixels.set(x, 255 - y, 2, x);
+            pixelSetter(x, 255 - y, [x, x, x], pixels);
+
           }
         }
       }
@@ -56,9 +55,8 @@ module.exports = function Channel(options, UI) {
         let pixCount = Math.round(convfactor * hist[x]);
 
         for (let y = startY; y < pixCount; y++) {
-          pixels.set(x, 255 - y, 0, 204);
-          pixels.set(x, 255 - y, 1, 255);
-          pixels.set(x, 255 - y, 2, 153);
+          pixelSetter(x, 255 - y, [204, 255, 153], pixels);
+
         }
       }
 

src/modules/PaintBucket/PaintBucket.js

@@ -2,6 +2,7 @@ module.exports = exports = function(pixels, options) {
 
 
   let defaults = require('./../../util/getDefaults.js')(require('./info.json'));
+  const pixelSetter = require('../../util/pixelSetter.js');
 
   let fillColor = options.fillColor || defaults.fillColor,
     x = parseInt(options.startingX) || defaults.startingX,
@@ -47,10 +48,8 @@ module.exports = exports = function(pixels, options) {
       } while (isSimilar(currx, south) && south < height);
 
       for (n = north + 1; n < south; n += 1) {
-        pixels.set(currx, n, 0, fillColor[0]);
-        pixels.set(currx, n, 1, fillColor[1]);
-        pixels.set(currx, n, 2, fillColor[2]);
-        pixels.set(currx, n, 3, fillColor[3]);
+        pixelSetter(currx, n, fillColor, pixels);
+
         if (isSimilar(currx - 1, n)) {
           queuex.push(currx - 1);
           queuey.push(n);

src/modules/ReplaceColor/ReplaceColor.js

@@ -1,4 +1,6 @@
 module.exports = exports = function(pixels, options){
+  const pixelSetter = require('../../util/pixelSetter.js');
+
   var color = options.color || 'rgb(228,86,81)';
   color = color.substring(color.indexOf('(') + 1, color.length - 1); // extract only the values from rgba(_,_,_,_)
 
@@ -23,7 +25,6 @@ module.exports = exports = function(pixels, options){
                  g >= cg * minFactor &&  g <= cg * maxFactor &&
                  b >= cb * minFactor &&  b <= cb * maxFactor);
   }
-
   for(var i = 0; i < pixels.shape[0]; i++){
     for(var j = 0; j < pixels.shape[1]; j++){
       var r = pixels.get(i, j, 0),
@@ -32,16 +33,16 @@ module.exports = exports = function(pixels, options){
       if(isSimilar(r, g, b)){
         if (replaceMethod == 'greyscale'){
           var avg = (r + g + b) / 3;
-          pixels.set(i, j, 0, avg);
-          pixels.set(i, j, 1, avg);
-          pixels.set(i, j, 2, avg);
+          pixelSetter(i, j, [avg, avg, avg], pixels);
+
         }else {
-          pixels.set(i, j, 0, replaceColor[0]);
-          pixels.set(i, j, 1, replaceColor[1]);
-          pixels.set(i, j, 2, replaceColor[2]);
+          pixelSetter(i, j, replaceColor, pixels);
+
         }
       }
     }
+    
+    
   }
   return pixels;
 };

src/modules/_nomodule/PixelManipulation.js

@@ -5,6 +5,9 @@
 module.exports = function PixelManipulation(image, options) {
   // To handle the case where pixelmanipulation is called on the input object itself
   // like input.pixelManipulation(options)
+  
+  const pixelSetter = require('../../util/pixelSetter.js');
+
   if (arguments.length <= 1) {
     options = image;
     image = this;
@@ -86,10 +89,8 @@ module.exports = function PixelManipulation(image, options) {
               y
             );
 
-            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]);
+            pixelSetter(x, y, pixel, pixels);
+
           }
         }
       };

src/util/pixelSetter.js

@@ -0,0 +1,5 @@
+module.exports = function(x, y, value, pixels){
+  for(let i = 0; i < value.length; i++){
+    pixels.set(x, y, i, value[i]);
+  }
+};