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Thread: Bit Blit?

  1. #1
    Member Newbie
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    Bit Blit?

    What the heck is Bit Blit? I wouldn't be asking here in this forum, except I did a search on it in 'coding beginners' and nothing was found.

  2. #2
    Senior Member OpenGL Guru Relic's Avatar
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    Re: Bit Blit?

    Because there is no OpenGL function named so.

    A blt is a block transfer of data,
    BitBlt is a usual name for block transfer of arbitrary rectangular binary image data.

    Here is a Win32 GDI function doing this:
    http://msdn.microsoft.com/library/de...tmaps_0fzo.asp

    The nearest OpenGL equivalents would be glCopyPixels, glReadPixels and glDrawPixels, but there are a lot of differences to the above.

  3. #3
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    Re: Bit Blit?

    In the past, I've tried using glCopyPixels, glReadPixels, glDrawPixels in attempts to rapidly move a 640 x 480 region of pixels to a memory buffer, then back again. Hopefully BitBlt would do this better than I could make glCopy/Read/DrawPixels do it.

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