DX Windowed Mode Double Buffering

This is a discussion on DX Windowed Mode Double Buffering within the Game Programming forums, part of the General Programming Boards category; From the book Tricks of Windows Game Programming Gurus by Andre LaMothe refering to windows mode programming. The only difference ...

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    DX Windowed Mode Double Buffering

    From the book Tricks of Windows Game Programming Gurus by Andre LaMothe refering to windows mode programming.
    The only difference is that you don't set the video mode or create a secondary back buffer. You are not allowed to page flip in windowed modes. You must either use blitter to double buffer or do it yourself, but you can't set up a complex surface chain and then call Flip().
    My question is if you do want to use windows mode and hence blitter to double buffer should you go ahead and create a back buffer or use an offscreen surface instead?

    Second would using the blitter and a surface to double buffer be faster then setting up your own buffer and using memcpy.

    Thirdly if you set up your own buffer can you use blitter to copy from it, if so how?

  2. #2
    l'Anziano DavidP's Avatar
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    One piece of enlightenment for you:

    blit = memcpy

    buffer = surface

    A back buffer is a surface in memory. When you blit you are just memcpy'ing.
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  3. #3
    Super Moderator VirtualAce's Avatar
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    And don't forget to lock the surface (buffer) before you do this or you won't see anything. Lamothe warns about this in that book as well.

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