https://github.com/georgechan/pnglib

A PNG lib for node.js
https://github.com/georgechan/pnglib

Last synced: 2 months ago
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A PNG lib for node.js

• Host: GitHub
• URL: https://github.com/georgechan/pnglib
• Owner: GeorgeChan
• Created: 2013-08-20T16:01:13.000Z (over 11 years ago)
• Default Branch: master
• Last Pushed: 2017-01-21T16:05:20.000Z (almost 8 years ago)
• Last Synced: 2024-11-03T14:51:46.305Z (2 months ago)
• Language: JavaScript
• Size: 109 KB
• Stars: 11
• Watchers: 2
• Forks: 8
• Open Issues: 4
• Metadata Files:
  • Readme: README.md

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README

        
#PNGLib

A PNG lib for Node.js

 A handy class to calculate color values.

```

 version 1.0

 author Robert Eisele 

 copyright Copyright (c) 2010, Robert Eisele

 link http://www.xarg.org/2010/03/generate-client-side-png-files-using-javascript/

 license http://www.opensource.org/licenses/bsd-license.php BSD License

```

Modified by George Chan 

##Install

```

npm install pnglib

```

##Examples

```javascript

var pnglib = require('pnglib');

var p = new pnglib(300,100,8);

var lineIndex = p.index(10,25);

p.buffer[lineIndex+j]='\x01';

p.color(0, 0, 0, 0);  // First color: background (red, green, blue, alpha)

p.color(80, 80, 80, 255); // Second color: paint (red, green, blue, alpha)

```

More example see:

https://github.com/GeorgeChan/captchapng