What is the difference between FBO and PBO? Which one should I use for off-screen rendering?
What are the differences between a Frame Buffer Object and a Pixel Buffer Object in OpenGL?
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A FBO (Framebuffer object) is a target where you can render images other than the default frame buffer or screen.
A PBO (Pixel Buffer Object) allows asynchronous transfers of pixel data to and from the device. This can be helpful to improve overall performance when rendering if you have other things that can be done while waiting for the pixel transfer.
I would read VBOs, PBOs and FBOs:
Apple has posted two very nice bits of sample code demonstrating PBOs and FBOs. Even though these are Mac-specific, as sample code they're good on any platoform because PBOs and FBOs are OpenGL extensions, not windowing system extensions.
So what are all these objects? Here's the situation:
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