In my application I want to draw some temporary controls over a scene to give an example say marquee rectangle. I can not use overlay context since I do not have one.
Also, I am in a RGBA mode hence I can not use glLogicOp(GL_INVERT) to erase the drawn control.
Is there any function or combination of gl functions which will give me same effect as glLogicOP(GL_INVERT) ?
Is is there any other way to acheive the same effect as smooth marquee rectangle without using overlay context and in RGBA mode ?
Thanks in advance,