update examples

Author: hg-pyun

examples/basic.js

@@ -13,7 +13,7 @@ app.use(function (req, res, next) {
     let imagePath = path.join(__dirname, 'cat.jpg');
 
     Filter.render(imagePath, Filter.preset.invert, function (result) {
-        fs.writeFile(`result.basic.${result.type}`, result.data);
+        result.data.pipe(fs.createWriteStream(`result.${result.type}`));
         res.send('save filtered image');
     });
 });

examples/basic_options.js

@@ -17,7 +17,7 @@ app.use(function (req, res, next) {
     };
 
     Filter.render(imagePath, Filter.preset.brightness, options, function (result) {
-        fs.writeFile(`result.basic.options.${result.type}`, result.data);
+        result.data.pipe(fs.createWriteStream(`result.${result.type}`));
         res.send('save filtered image');
     })
 });

examples/custom.js

@@ -14,17 +14,19 @@ app.use(function (req, res, next) {
 
     // custom filter
     let customInvertFilter = function (pixels) {
-        for(let i=0; i<pixels.length; i+=4 ){
-            pixels[i] = 255 - pixels[i];
-            pixels[i+1] = 255 - pixels[i+1];
-            pixels[i+2] = 255 - pixels[i+2];
-            pixels[i+3] = 255;
+        var data = pixels.data;
+
+        for (let i = 0; i < data.length; i += 4) {
+            data[i] = 255 - data[i];
+            data[i + 1] = 255 - data[i + 1];
+            data[i + 2] = 255 - data[i + 2];
+            data[i + 3] = 255;
         }
-        return pixels;
+        return data;
     };
 
     Filter.render(imagePath, customInvertFilter, function (result) {
-        fs.writeFile(`result.customInvertFilter.${result.type}`, result.data);
+        result.data.pipe(fs.createWriteStream(`result.${result.type}`));
         res.send('save filtered image');
     })
 });

examples/custom_options.js

@@ -13,24 +13,25 @@ app.use(function (req, res, next) {
     let imagePath = path.join(__dirname, 'cat.jpg');
 
     // custom filter with options
-    function CustomBrightnessFilter (pixels, options){
+    function CustomBrightnessFilter(pixels, options) {
+        var data = pixels.data;
         var value = options.value || 5;
 
-        for(var i =0; i< pixels.length; i+=4){
-            pixels[i] += value;
-            pixels[i+1] += value;
-            pixels[i+2] += value;
+        for (var i = 0; i < data.length; i += 4) {
+            data[i] += value;
+            data[i + 1] += value;
+            data[i + 2] += value;
         }
-        return pixels;
+        return data;
     }
 
     // third param for option.
     let options = {
-        value : 10
+        value: 10
     };
 
     Filter.render(imagePath, CustomBrightnessFilter, options, function (result) {
-        fs.writeFile(`result.CustomBrightnessFilter.${result.type}`, result.data);
+        result.data.pipe(fs.createWriteStream(`result.${result.type}`));
         res.send('save filtered image');
     })
 });