viziblr

Sparked by an interesting Hacker News thread recently –  if you need to implement blend modes or understand technically what is going on then you'll find these useful.

Photshop Blend Modes Explained
http://photoblogstop.com/photoshop/photoshop-blend-modes-explained

Insight into Photoshop 7.0 Blending Modes
http://dunnbypaul.net/blends/

Let’s Learn Math: Photoshop Blend Modes
http://www.venture-ware.com/kevin/coding/lets-learn-math-photoshop-blend-modes/

Photoshop Blend Mode Math
http://inlandstudios.com/en/?p=851

Implementations

• https://github.com/shazow/colorlib/blob/master/colorlib.js#L169
• https://github.com/Phrogz/context-blender/blob/master/context_blender.js

Obligatory Wikipedia Link
http://en.wikipedia.org/wiki/Blend_modes