DirectX

This is a discussion on DirectX within the Tech Board forums, part of the Community Boards category; Does it use Win32 API or bypasses it?...

  1. #1
    System Novice siavoshkc's Avatar
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    DirectX

    Does it use Win32 API or bypasses it?
    Last edited by siavoshkc; 09-20-2006 at 03:17 PM.
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  2. #2
    Cat without Hat CornedBee's Avatar
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    Bypasses. That's the whole point.
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  3. #3
    System Novice siavoshkc's Avatar
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    How it gets needed privillage?
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  4. #4
    Cat without Hat CornedBee's Avatar
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    By account of making direct calls to the public interface of the graphics card drivers. In theory, anyone can do that. It's just a really bad idea, because it ties you into the vendor-specific driver API. Oh, and no vendor publishes any documentation about their API - they only implement a low-level DirectX interface.

    At least I'm pretty sure that's how it works. This is getting slightly into the realm of speculation.
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  5. #5
    System Novice siavoshkc's Avatar
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    So you mean all full trust programs have direct access to device driver APIs in Windows?
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  6. #6
    Cat without Hat CornedBee's Avatar
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    Don't misunderstand me. I mean the API exposed by device drivers, which is essentially just another set of syscalls. I don't mean the DDK, the API the Windows kernel exposes to device drivers.

    Yes, every full trust app (which includes every app not written in a managed language) can access any syscall.
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  7. #7
    Reverse Engineer maxorator's Avatar
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    DirectX

  8. #8
    System Novice siavoshkc's Avatar
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    Where can I found a code example of such sys calls?
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  9. #9
    Frequently Quite Prolix dwks's Avatar
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    You mean, "Where can I find the source code for DirectX (a Microsoft product)?"
    dwk

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  10. #10
    System Novice siavoshkc's Avatar
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    As such sys calls is legal for programs (they are previlleged). Code from another coder should be found. Right?
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  11. #11
    Cat without Hat CornedBee's Avatar
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    Only if anyone who publishes their source actually issues such calls. But why should they?
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