A variety of other actions may be taken on the previous screenbuffer and other backbuffers (if they exist); it may be erased from memory, or returned to the back of the swap chain for further processing.
A variety of other actions may be taken on the previous screenbuffer. A variety of other actions may be taken on other backbuffers (if they exist). It may be erased from memory. It may be returned to the back of the swap chain for further processing.