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Thread: Reserving VBO memory twice

  1. #1
    Junior Member Newbie
    Join Date
    Sep 2008

    Reserving VBO memory twice


    I've got a question about the usage of VBOs. One can allocate memory when calling glBufferDataARB. But what happens if I call this function twice for the same buffer (maybe with another size)? Is the old memory freed or do I have to worry about that by myself?

    I haven't found an explanation for this question so far... Maybe somebody knows something about that.

    Thank you,

    Sorry, I just found the answer in the specs. But I can swear that it wasn't there berfore!

  2. #2
    Senior Member OpenGL Pro Zengar's Avatar
    Join Date
    Sep 2001

    Re: Reserving VBO memory twice

    The glBufferData effectively creates a VBO. The garbage collection for unused data (that is, if you assign another data to an object id) is done automatically by OpenGL.

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