pngjs - npm Package Compare versions

Comparing version 2.0.0 to 2.1.0

lib/bitpacker.js

@@ -20,2 +20,13 @@ 'use strict';
 
+  var bgColor = options.bgColor || {};
+  if (bgColor.red === undefined) {
+    bgColor.red = 255;
+  }
+  if (bgColor.green === undefined) {
+    bgColor.green = 255;
+  }
+  if (bgColor.blue === undefined) {
+    bgColor.blue = 255;
+  }
+
   for (var y = 0; y < height; y++) {
@@ -30,2 +41,8 @@ for (var x = 0; x < width; x++) {
         alpha = data[inIndex + 3];
+        if (!outHasAlpha) {
+          alpha /= 255;
+          red = Math.min(Math.max(Math.round((1 - alpha) * bgColor.red + alpha * red), 0), 255);
+          green = Math.min(Math.max(Math.round((1 - alpha) * bgColor.green + alpha * green), 0), 255);
+          blue = Math.min(Math.max(Math.round((1 - alpha) * bgColor.blue + alpha * blue), 0), 255);
+        }
       }
@@ -49,2 +66,2 @@ else {
   return outData;
-};
+};

lib/format-normaliser.js

@@ -0,0 +0,0 @@ 'use strict';

package.json

 {
   "name": "pngjs",
-  "version": "2.0.0",
+  "version": "2.1.0",
   "description": "PNG encoder/decoder in pure JS, supporting any bit size & interlace, async & sync with full test suite.",
@@ -5,0 +5,0 @@ "contributors": [

README.md

@@ -1,2 +0,2 @@
-[![Build Status](https://travis-ci.org/lukeapage/pngjs2.svg?branch=master)](https://travis-ci.org/lukeapage/pngjs2) [![Build status](https://ci.appveyor.com/api/projects/status/tb8418jql1trkntd/branch/master?svg=true)](https://ci.appveyor.com/project/lukeapage/pngjs2/branch/master) [![Coverage Status](https://coveralls.io/repos/lukeapage/pngjs2/badge.svg?branch=master&service=github)](https://coveralls.io/github/lukeapage/pngjs2?branch=master) [![npm version](https://badge.fury.io/js/pngjs2.svg)](http://badge.fury.io/js/pngjs2)
+[![Build Status](https://travis-ci.org/lukeapage/pngjs.svg?branch=master)](https://travis-ci.org/lukeapage/pngjs) [![Build status](https://ci.appveyor.com/api/projects/status/tb8418jql1trkntd/branch/master?svg=true)](https://ci.appveyor.com/project/lukeapage/pngjs2/branch/master) [![Coverage Status](https://coveralls.io/repos/lukeapage/pngjs2/badge.svg?branch=master&service=github)](https://coveralls.io/github/lukeapage/pngjs2?branch=master) [![npm version](https://badge.fury.io/js/pngjs.svg)](http://badge.fury.io/js/pngjs)
 
@@ -118,2 +118,4 @@ pngjs
 - `inputHasAlpha` - whether the input bitmap has 4 bits per pixel (rgb and alpha) or 3 (rgb - no alpha).
+- `bgColor` - an object containing red, green, and blue values between 0 and 255
+that is used when packing a PNG if alpha is not to be included (default: 255,255,255)
 
@@ -210,2 +212,26 @@
 
+## Packing a PNG and removing alpga (RGBA to RGB)
+
+When removing the alpha channel from an image, there needs to be a background color to correctly
+convert each pixel's transparency to the appropriate RGB value. By default, pngjs will flatten
+the image against a white background. You can override this in the options:
+
+```js
+var fs = require('fs'),
+    PNG = require('pngjs').PNG;
+
+fs.createReadStream('in.png')
+    .pipe(new PNG({
+        colorType: 2,
+        bgColor: {
+            red: 0,
+            green: 255,
+            blue: 0
+        }
+    }))
+    .on('parsed', function() {
+        this.pack().pipe(fs.createWriteStream('out.png'));
+    });
+```
+
 # Sync API
@@ -238,2 +264,6 @@
 
+### 2.1.0 - 28/10/2015
+ - rename package to pngjs
+ - added 'bgColor' option
+
 ### 2.0.0 - 08/10/2015
@@ -240,0 +270,0 @@ - fixes to readme

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Fixed alerts

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Major refactor

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New author

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Improved metrics

Total package byte prevSize

709056

increased by571.29%

Number of package files

78

increased by143.75%

Lines of code

2316

increased by51.08%

Number of lines in readme file

322

increased by10.27%

Number of medium supply chain risk alerts

0

decreased by-100%

No dependency changes