Okay I switched to ReadPixelFast and there seems to be no noticable change. I guess I don't understand why there would be a ReadPixel and ReadPixelFast. If RPF is always faster then why have two commands? Is locking and unlocking the buffer the potential problem?
I also came up with a solution for my 32bit and 16bit problem. I can now select my countries in either mode just fine.
I also came up with a solution for my 32bit and 16bit problem. I can now select my countries in either mode just fine.