We've been trying to replicate the most common blending modes that are available in Photoshop and Quartz 2D, but we've only come up with 3 and that's after some long searching online.
For anyone interested, here they are:
- Multiply = GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA
- Screen = GL_MINUS_DST_COLOR, GL_ONE
- Linear Dodge = GL_ONE, GL_ONE
You can try these and other such modes in action online, at this very useful website: http://www.andersriggelsen.dk/glblendfunc.php
Now, we would appreciate it if anyone could provide us with additional blending modes that we can recreate inside Cocos2D, since our Open GL experience is really, really limited.
Thank you in advance!