📄 ddraw_thunk.c

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    cbcontext.func    = cb;
    cbcontext.context = context;

    return IDirectDraw7_EnumDisplayModes(COM_INTERFACE_CAST(IDirectDrawImpl,
							    IDirectDraw,
							    IDirectDraw7,
							    This),
					 dwFlags, (LPDDSURFACEDESC2)pDDSD, &cbcontext,
					 EnumDisplayModesCallbackThunk);
}

static HRESULT WINAPI
IDirectDraw2Impl_EnumDisplayModes(LPDIRECTDRAW2 This, DWORD dwFlags,
				  LPDDSURFACEDESC pDDSD, LPVOID context,
				  LPDDENUMMODESCALLBACK cb)
{
    struct displaymodescallback_context cbcontext;

    cbcontext.func    = cb;
    cbcontext.context = context;

    return IDirectDraw7_EnumDisplayModes(COM_INTERFACE_CAST(IDirectDrawImpl,
							    IDirectDraw2,
							    IDirectDraw7,
							    This),
					 dwFlags, (LPDDSURFACEDESC2)pDDSD, &cbcontext,
					 EnumDisplayModesCallbackThunk);
}

static HRESULT WINAPI
IDirectDraw4Impl_EnumDisplayModes(LPDIRECTDRAW4 This, DWORD dwFlags,
				  LPDDSURFACEDESC2 pDDSD, LPVOID context,
				  LPDDENUMMODESCALLBACK2 cb)
{
    return IDirectDraw7_EnumDisplayModes(COM_INTERFACE_CAST(IDirectDrawImpl,
							    IDirectDraw4,
							    IDirectDraw7,
							    This),
					 dwFlags, pDDSD, context, cb);
}

struct surfacescallback_context
{
    LPDDENUMSURFACESCALLBACK func;
    LPVOID context;
};

static HRESULT CALLBACK
EnumSurfacesCallbackThunk(LPDIRECTDRAWSURFACE7 pSurf, LPDDSURFACEDESC2 pDDSD,
			  LPVOID context)
{
    struct surfacescallback_context *cbcontext = context;

    /* This coercion is safe, since the IDirectDrawSurface3 vtable has the
     * IDirectDrawSurface vtable layout at the beginning  */
    return cbcontext->func((LPDIRECTDRAWSURFACE)
                           COM_INTERFACE_CAST(IDirectDrawSurfaceImpl,
					      IDirectDrawSurface7,
					      IDirectDrawSurface3, pSurf),
			   (LPDDSURFACEDESC)pDDSD, cbcontext->context);
}

static HRESULT WINAPI
IDirectDrawImpl_EnumSurfaces(LPDIRECTDRAW This, DWORD dwFlags,
			     LPDDSURFACEDESC pDDSD, LPVOID context,
			     LPDDENUMSURFACESCALLBACK cb)
{
    struct surfacescallback_context cbcontext;

    cbcontext.func    = cb;
    cbcontext.context = context;

    return IDirectDraw7_EnumSurfaces(COM_INTERFACE_CAST(IDirectDrawImpl,
							IDirectDraw,
							IDirectDraw7, This),
				     dwFlags, (LPDDSURFACEDESC2)pDDSD,
				     &cbcontext, EnumSurfacesCallbackThunk);
}

static HRESULT WINAPI
IDirectDraw2Impl_EnumSurfaces(LPDIRECTDRAW2 This, DWORD dwFlags,
			      LPDDSURFACEDESC pDDSD, LPVOID context,
			      LPDDENUMSURFACESCALLBACK cb)
{
    struct surfacescallback_context cbcontext;

    cbcontext.func    = cb;
    cbcontext.context = context;

    return IDirectDraw7_EnumSurfaces(COM_INTERFACE_CAST(IDirectDrawImpl,
							IDirectDraw2,
							IDirectDraw7, This),
				     dwFlags, (LPDDSURFACEDESC2)pDDSD,
				     &cbcontext, EnumSurfacesCallbackThunk);
}

static HRESULT WINAPI
IDirectDraw4Impl_EnumSurfaces(LPDIRECTDRAW4 This, DWORD dwFlags,
			      LPDDSURFACEDESC2 pDDSD, LPVOID context,
			      LPDDENUMSURFACESCALLBACK2 cb)
{
    return IDirectDraw7_EnumSurfaces(COM_INTERFACE_CAST(IDirectDrawImpl,
							IDirectDraw4,
							IDirectDraw7, This),
				     dwFlags, pDDSD, context,
				     (LPDDENUMSURFACESCALLBACK7)cb);
}

static HRESULT WINAPI
IDirectDrawImpl_FlipToGDISurface(LPDIRECTDRAW This)
{
    return IDirectDraw7_FlipToGDISurface(COM_INTERFACE_CAST(IDirectDrawImpl,
							    IDirectDraw,
							    IDirectDraw7,
							    This));
}

static HRESULT WINAPI
IDirectDraw2Impl_FlipToGDISurface(LPDIRECTDRAW2 This)
{
    return IDirectDraw7_FlipToGDISurface(COM_INTERFACE_CAST(IDirectDrawImpl,
							    IDirectDraw2,
							    IDirectDraw7,
							    This));
}

static HRESULT WINAPI
IDirectDraw4Impl_FlipToGDISurface(LPDIRECTDRAW4 This)
{
    return IDirectDraw7_FlipToGDISurface(COM_INTERFACE_CAST(IDirectDrawImpl,
							    IDirectDraw4,
							    IDirectDraw7,
							    This));
}

static HRESULT WINAPI
IDirectDrawImpl_GetCaps(LPDIRECTDRAW This, LPDDCAPS pDDC1, LPDDCAPS pDDC2)
{
    return IDirectDraw7_GetCaps(COM_INTERFACE_CAST(IDirectDrawImpl,
						   IDirectDraw, IDirectDraw7,
						   This), pDDC1, pDDC2);
}

static HRESULT WINAPI
IDirectDraw2Impl_GetCaps(LPDIRECTDRAW2 This, LPDDCAPS pDDC1, LPDDCAPS pDDC2)
{
    return IDirectDraw7_GetCaps(COM_INTERFACE_CAST(IDirectDrawImpl,
						   IDirectDraw2, IDirectDraw7,
						   This), pDDC1, pDDC2);
}

static HRESULT WINAPI
IDirectDraw4Impl_GetCaps(LPDIRECTDRAW4 This, LPDDCAPS pDDC1, LPDDCAPS pDDC2)
{
    return IDirectDraw7_GetCaps(COM_INTERFACE_CAST(IDirectDrawImpl,
						   IDirectDraw4, IDirectDraw7,
						   This), pDDC1, pDDC2);
}

static HRESULT WINAPI
IDirectDrawImpl_GetDisplayMode(LPDIRECTDRAW This, LPDDSURFACEDESC pDDSD)
{
    return IDirectDraw7_GetDisplayMode(COM_INTERFACE_CAST(IDirectDrawImpl,
							  IDirectDraw,
							  IDirectDraw7, This),
				       (LPDDSURFACEDESC2)pDDSD);
}

static HRESULT WINAPI
IDirectDraw2Impl_GetDisplayMode(LPDIRECTDRAW2 This, LPDDSURFACEDESC pDDSD)
{
    return IDirectDraw7_GetDisplayMode(COM_INTERFACE_CAST(IDirectDrawImpl,
							  IDirectDraw2,
							  IDirectDraw7, This),
				       (LPDDSURFACEDESC2)pDDSD);
}

static HRESULT WINAPI
IDirectDraw4Impl_GetDisplayMode(LPDIRECTDRAW4 This, LPDDSURFACEDESC2 pDDSD)
{
    return IDirectDraw7_GetDisplayMode(COM_INTERFACE_CAST(IDirectDrawImpl,
							  IDirectDraw4,
							  IDirectDraw7, This),
				       pDDSD);
}

static HRESULT WINAPI
IDirectDrawImpl_GetFourCCCodes(LPDIRECTDRAW This, LPDWORD lpNumCodes,
			       LPDWORD lpCodes)
{
    return IDirectDraw7_GetFourCCCodes(COM_INTERFACE_CAST(IDirectDrawImpl,
							  IDirectDraw,
							  IDirectDraw7,
							  This),
				       lpNumCodes, lpCodes);
}

static HRESULT WINAPI
IDirectDraw2Impl_GetFourCCCodes(LPDIRECTDRAW2 This, LPDWORD lpNumCodes,
				LPDWORD lpCodes)
{
    return IDirectDraw7_GetFourCCCodes(COM_INTERFACE_CAST(IDirectDrawImpl,
							  IDirectDraw2,
							  IDirectDraw7,
							  This),
				       lpNumCodes, lpCodes);
}

static HRESULT WINAPI
IDirectDraw4Impl_GetFourCCCodes(LPDIRECTDRAW4 This, LPDWORD lpNumCodes,
				LPDWORD lpCodes)
{
    return IDirectDraw7_GetFourCCCodes(COM_INTERFACE_CAST(IDirectDrawImpl,
							  IDirectDraw4,
							  IDirectDraw7,
							  This),
				       lpNumCodes, lpCodes);
}

static HRESULT WINAPI
IDirectDrawImpl_GetGDISurface(LPDIRECTDRAW This, LPDIRECTDRAWSURFACE *ppSurf)
{
    LPDIRECTDRAWSURFACE7 pSurf7;
    HRESULT hr;

    hr = IDirectDraw7_GetGDISurface(COM_INTERFACE_CAST(IDirectDrawImpl,
						       IDirectDraw,
						       IDirectDraw7,
						       This), &pSurf7);

    /* This coercion is safe, since the IDirectDrawSurface3 vtable has the
     * IDirectDrawSurface vtable layout at the beginning  */
    *ppSurf = (LPDIRECTDRAWSURFACE)COM_INTERFACE_CAST(IDirectDrawSurfaceImpl, IDirectDrawSurface7,
				 IDirectDrawSurface3, pSurf7);

    return hr;
}

static HRESULT WINAPI
IDirectDraw2Impl_GetGDISurface(LPDIRECTDRAW2 This, LPDIRECTDRAWSURFACE *ppSurf)
{
    LPDIRECTDRAWSURFACE7 pSurf7;
    HRESULT hr;

    hr = IDirectDraw7_GetGDISurface(COM_INTERFACE_CAST(IDirectDrawImpl,
						       IDirectDraw2,
						       IDirectDraw7,
						       This), &pSurf7);

    /* This coercion is safe, since the IDirectDrawSurface3 vtable has the
     * IDirectDrawSurface vtable layout at the beginning  */
    *ppSurf = (LPDIRECTDRAWSURFACE)COM_INTERFACE_CAST(IDirectDrawSurfaceImpl, IDirectDrawSurface7,
				 IDirectDrawSurface3, pSurf7);

    return hr;
}

static HRESULT WINAPI
IDirectDraw4Impl_GetGDISurface(LPDIRECTDRAW4 This,
			       LPDIRECTDRAWSURFACE4 *ppSurf)
{
    return IDirectDraw7_GetGDISurface(COM_INTERFACE_CAST(IDirectDrawImpl,
							 IDirectDraw4,
							 IDirectDraw7,
							 This),
				      (LPDIRECTDRAWSURFACE7 *)ppSurf);
}

static HRESULT WINAPI
IDirectDrawImpl_GetMonitorFrequency(LPDIRECTDRAW This, LPDWORD pdwFreq)
{
    return IDirectDraw7_GetMonitorFrequency(COM_INTERFACE_CAST(IDirectDrawImpl,
							       IDirectDraw,
							       IDirectDraw7,
							       This),
					    pdwFreq);
}

static HRESULT WINAPI
IDirectDraw2Impl_GetMonitorFrequency(LPDIRECTDRAW2 This, LPDWORD pdwFreq)
{
    return IDirectDraw7_GetMonitorFrequency(COM_INTERFACE_CAST(IDirectDrawImpl,
							       IDirectDraw2,
							       IDirectDraw7,
							       This),
					    pdwFreq);
}

static HRESULT WINAPI
IDirectDraw4Impl_GetMonitorFrequency(LPDIRECTDRAW4 This, LPDWORD pdwFreq)
{
    return IDirectDraw7_GetMonitorFrequency(COM_INTERFACE_CAST(IDirectDrawImpl,
							       IDirectDraw4,
							       IDirectDraw7,
							       This),
					    pdwFreq);
}

static HRESULT WINAPI
IDirectDrawImpl_GetScanLine(LPDIRECTDRAW This, LPDWORD pdwLine)
{
    return IDirectDraw7_GetScanLine(COM_INTERFACE_CAST(IDirectDrawImpl,
						       IDirectDraw,
						       IDirectDraw7,
						       This), pdwLine);
}

static HRESULT WINAPI
IDirectDraw2Impl_GetScanLine(LPDIRECTDRAW2 This, LPDWORD pdwLine)
{
    return IDirectDraw7_GetScanLine(COM_INTERFACE_CAST(IDirectDrawImpl,
						       IDirectDraw2,
						       IDirectDraw7,
						       This), pdwLine);
}

static HRESULT WINAPI
IDirectDraw4Impl_GetScanLine(LPDIRECTDRAW4 This, LPDWORD pdwLine)
{
    return IDirectDraw7_GetScanLine(COM_INTERFACE_CAST(IDirectDrawImpl,
						       IDirectDraw4,
						       IDirectDraw7,
						       This), pdwLine);
}

static HRESULT WINAPI
IDirectDrawImpl_GetVerticalBlankStatus(LPDIRECTDRAW This, LPBOOL lpbIsInVB)
{
    return IDirectDraw7_GetVerticalBlankStatus(COM_INTERFACE_CAST(IDirectDrawImpl,
								  IDirectDraw,
								  IDirectDraw7,
								  This),
					       lpbIsInVB);
}

static HRESULT WINAPI
IDirectDraw2Impl_GetVerticalBlankStatus(LPDIRECTDRAW2 This, LPBOOL lpbIsInVB)
{
    return IDirectDraw7_GetVerticalBlankStatus(COM_INTERFACE_CAST(IDirectDrawImpl,
								  IDirectDraw2,
								  IDirectDraw7,
								  This),
					       lpbIsInVB);
}

static HRESULT WINAPI
IDirectDraw4Impl_GetVerticalBlankStatus(LPDIRECTDRAW4 This, LPBOOL lpbIsInVB)
{
    return IDirectDraw7_GetVerticalBlankStatus(COM_INTERFACE_CAST(IDirectDrawImpl,
								  IDirectDraw4,
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