cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   Aaron Koolen
   Member

   Essentially I want to be able to load a PNG and than parse the pixels, looking for non blank ones. Is there a way to do it in Cocos2d?

   The logic is fine, I just can't see any "read" methods to access the texture data once loaded.

   Thanks

   Cocos2d 0.8
   iPhone 3GS w/3.1

   Posted 2 years ago #
2. 

   slipster216
   Moderator

   You can use glReadPixels, but be warned it's slow...

   Posted 2 years ago #
3. 

   Steve Oldmeadow
   Administrator

   Alternatively you can use Core Graphics methods. See the following post for the often mentioned "Ernesto Corvi Method".

   http://groups.google.com/group/cocos2d-iphone-discuss/browse_thread/thread/f6e734e00d863f5e/6c2e8d6494f8a2ef#6c2e8d6494f8a2ef

   Posted 2 years ago #
4. 

   PhilM
   Member

   lol, we should probably have a dedicated wiki page for Ernesto's post, I've lost count how many times its been referenced since!

   Posted 2 years ago #

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