Original Post
For my 2D tile based game 
I have two images involved in a collision test (there is also a background drawn), I detect that they are over one another, and want to test each at a per-pixel level, to see if they both have a non-transparent colour anywhere in my collision space, is there any way to do this real-time with open GL calls?
I have two images involved in a collision test (there is also a background drawn), I detect that they are over one another, and want to test each at a per-pixel level, to see if they both have a non-transparent colour anywhere in my collision space, is there any way to do this real-time with open GL calls?