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Can't include <d3dkmdt.h> in a UMDF project (but need D3DKMDT_VIDEO_SIGNAL_STANDARD typedef)

scott_smithscott_smith Member Posts: 51
edited January 12 in NTDEV

Microsoft documentation for the D3DKMDT_VIDEO_SIGNAL_STANDARD type refers to d3dkmdt.h, but including that header directly (at least, in a UMDF project) yields a compiler error message:

1>c:\program files (x86)\windows kits\10\include\10.0.17763.0\shared\d3dkmdt.h(20): fatal error C1189: #error:  This header should not be included directly!

Anyone know which header file(s) to include in order to get the definition for this type?

Scott Smith
Windows Developer since 1989


  • Tim_RobertsTim_Roberts Member - All Emails Posts: 13,760

    Go look at the source file. It can't be included directly, but you can see the list of 7 different include files you can use.

    Tim Roberts, [email protected]
    Providenza & Boekelheide, Inc.

  • scott_smithscott_smith Member Posts: 51

    I tried that already, unfortunately:

    #include <d3dkmddi.h>
    //#include <d3dkmddi_pext.h>
    //#include <dxgdmm.h>
    //#include <vidpriv.h>
    //#include <dispmprt.h>
    //#include <dmm_diag.h>
    //#include <d3dkmthk.h>
    #include <d3dkmdt.h> // D3DKMDT_VIDEO_SIGNAL_STANDARD

    d3dkmddi.h is the include path, but including it prior to d3dkmdt.h yields a compiler error (MDL type undefined):

    1>c:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\shared\d3dkmddi.h(3739): error C2143: syntax error: missing ';' before '*'
    1>c:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\shared\d3dkmddi.h(3739): error C2238: unexpected token(s) preceding ';'

    dispmprt.h and d3dkmthk.h are located in C:\Program Files (x86)\Windows Kits\10\Include\10.0.17763.0\km\, which isn't in my (UMDF project) include path. I'm assuming it's not a good idea to include kernel-mode-specific headers in a user-mode driver project...

    The other four don't seem to exist.

    Scott Smith
    Windows Developer since 1989

  • scott_smithscott_smith Member Posts: 51

    Follow Up from Microsoft (as an FYI for anyone reading this later):

    You are correct that you cannot include this file in an indirect display project. The Indirect Display Sample simply adds the hard-coded numerical value of 255 (D3DKMDT_VSS_OTHER) for videoStandard. If you don't want to hard-code the value, the dev team suggested that one approach would be to copy the D3DKMDT_VIDEO_SIGNAL_STANDARD definition to your project.

    Scott Smith
    Windows Developer since 1989

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