C++ EngSetLastError函数代码示例

BOOL FASTCALL
co_IntRegisterLogonProcess(HANDLE ProcessId, BOOL Register)
{
   NTSTATUS Status;
   PEPROCESS Process;

   Status = PsLookupProcessByProcessId(ProcessId, &Process);
   if (!NT_SUCCESS(Status))
   {
      EngSetLastError(RtlNtStatusToDosError(Status));
      return FALSE;
   }

   ProcessId = Process->UniqueProcessId;

   ObDereferenceObject(Process);

   if (Register)
   {
      /* Register the logon process */
      if (gpidLogon != 0)
         return FALSE;

      gpidLogon = ProcessId;
   }
   else
   {
      /* Deregister the logon process */
      if (gpidLogon != ProcessId)
         return FALSE;

      gpidLogon = 0;
   }

   return TRUE;
}

HWND APIENTRY
NtUserSetClipboardViewer(HWND hWndNewViewer)
{
    HWND hWndNext = NULL;
    PWINSTATION_OBJECT pWinStaObj = NULL;
    PWND pWindow;

    UserEnterExclusive();

    pWinStaObj = IntGetWinStaForCbAccess();
    if (!pWinStaObj)
        goto cleanup;

    pWindow = UserGetWindowObject(hWndNewViewer);
    if (!pWindow)
    {
        EngSetLastError(ERROR_INVALID_WINDOW_HANDLE);
        goto cleanup;
    }

    /* Return previous viewer. New viever window should
       send messages to rest of the chain */
    if (pWinStaObj->spwndClipViewer)
        hWndNext = pWinStaObj->spwndClipViewer->head.h;

    /* Set new viewer window */
    pWinStaObj->spwndClipViewer = pWindow;

cleanup:
    if(pWinStaObj)
        ObDereferenceObject(pWinStaObj);

    UserLeave();

    return hWndNext;
}

BOOL APIENTRY
NtUserUnlockWindowStation(HWINSTA hWindowStation)
{
    PWINSTATION_OBJECT Object;
    NTSTATUS Status;
    BOOL Ret;

    TRACE("About to set process window station with handle (%p)\n",
          hWindowStation);

    if (gpidLogon != PsGetCurrentProcessId())
    {
        ERR("Unauthorized process attempted to unlock the window station!\n");
        EngSetLastError(ERROR_ACCESS_DENIED);
        return FALSE;
    }

    Status = IntValidateWindowStationHandle(hWindowStation,
                                            UserMode,
                                            0,
                                            &Object,
                                            0);
    if (!NT_SUCCESS(Status))
    {
        TRACE("Validation of window station handle (%p) failed\n",
              hWindowStation);
        SetLastNtError(Status);
        return FALSE;
    }

    Ret = (Object->Flags & WSS_LOCKED) == WSS_LOCKED;
    Object->Flags &= ~WSS_LOCKED;

    ObDereferenceObject(Object);
    return Ret;
}

COLORREF FASTCALL
IntSetDCBrushColor(HDC hdc, COLORREF crColor)
{
   COLORREF OldColor = CLR_INVALID;
   PDC dc;
   if (!(dc = DC_LockDc(hdc)))
   {
      EngSetLastError(ERROR_INVALID_HANDLE);
      return CLR_INVALID;
   }
   else
   {
      OldColor = (COLORREF) dc->pdcattr->ulBrushClr;
      dc->pdcattr->ulBrushClr = (ULONG) crColor;

      if ( dc->pdcattr->crBrushClr != crColor )
      {
         dc->pdcattr->ulDirty_ |= DIRTY_FILL;
         dc->pdcattr->crBrushClr = crColor;
      }
   }
   DC_UnlockDc(dc);
   return OldColor;
}

BOOL
APIENTRY
NtUserGetGUIThreadInfo(
   DWORD idThread, /* If NULL use foreground thread */
   LPGUITHREADINFO lpgui)
{
   NTSTATUS Status;
   PTHRDCARETINFO CaretInfo;
   GUITHREADINFO SafeGui;
   PDESKTOP Desktop;
   PUSER_MESSAGE_QUEUE MsgQueue;
   PTHREADINFO W32Thread;
   PETHREAD Thread = NULL;

   DECLARE_RETURN(BOOLEAN);

   TRACE("Enter NtUserGetGUIThreadInfo\n");
   UserEnterShared();

   Status = MmCopyFromCaller(&SafeGui, lpgui, sizeof(DWORD));
   if(!NT_SUCCESS(Status))
   {
      SetLastNtError(Status);
      RETURN( FALSE);
   }

   if(SafeGui.cbSize != sizeof(GUITHREADINFO))
   {
      EngSetLastError(ERROR_INVALID_PARAMETER);
      RETURN( FALSE);
   }

   if (idThread)
   {
      Status = PsLookupThreadByThreadId((HANDLE)(DWORD_PTR)idThread, &Thread);
      if(!NT_SUCCESS(Status))
      {
         EngSetLastError(ERROR_ACCESS_DENIED);
         RETURN( FALSE);
      }
      W32Thread = (PTHREADINFO)Thread->Tcb.Win32Thread;
      Desktop = W32Thread->rpdesk;

      if (!Thread || !Desktop )
      {
        if(Thread)
           ObDereferenceObject(Thread);
        EngSetLastError(ERROR_ACCESS_DENIED);
        RETURN( FALSE);
      }
      
      if ( W32Thread->MessageQueue )
        MsgQueue = W32Thread->MessageQueue;
      else
      {
        if ( Desktop ) MsgQueue = Desktop->ActiveMessageQueue;
      }
   }
   else
   {  /* Get the foreground thread */
      /* FIXME: Handle NULL queue properly? */
      MsgQueue = IntGetFocusMessageQueue();
      if(!MsgQueue)
      {
        EngSetLastError(ERROR_ACCESS_DENIED);
        RETURN( FALSE);
      }
   }

   CaretInfo = &MsgQueue->CaretInfo;

   SafeGui.flags = (CaretInfo->Visible ? GUI_CARETBLINKING : 0);
/*
   if (W32Thread->pMenuState->pGlobalPopupMenu)
   {
       SafeGui.flags |= GUI_INMENUMODE;

       if (W32Thread->pMenuState->pGlobalPopupMenu->spwndNotify)
          SafeGui.hwndMenuOwner = UserHMGetHandle(W32Thread->pMenuState->pGlobalPopupMenu->spwndNotify);

       if (W32Thread->pMenuState->pGlobalPopupMenu->fHasMenuBar)
       {
          if (W32Thread->pMenuState->pGlobalPopupMenu->fIsSysMenu)
          {
             SafeGui.flags |= GUI_SYSTEMMENUMODE;
          }
       }
       else
       {
          SafeGui.flags |= GUI_POPUPMENUMODE;
       }
   }
 */
   SafeGui.hwndMenuOwner = MsgQueue->MenuOwner;

   if (MsgQueue->MenuOwner)
      SafeGui.flags |= GUI_INMENUMODE | MsgQueue->MenuState;

   if (MsgQueue->MoveSize)
      SafeGui.flags |= GUI_INMOVESIZE;
//.........这里部分代码省略.........

BOOL APIENTRY
GreStretchBltMask(
    HDC hDCDest,
    INT XOriginDest,
    INT YOriginDest,
    INT WidthDest,
    INT HeightDest,
    HDC hDCSrc,
    INT XOriginSrc,
    INT YOriginSrc,
    INT WidthSrc,
    INT HeightSrc,
    DWORD ROP,
    IN DWORD dwBackColor,
    HDC hDCMask,
    INT XOriginMask,
    INT YOriginMask)
{
    PDC DCDest;
    PDC DCSrc  = NULL;
    PDC DCMask = NULL;
    HDC ahDC[3];
    PGDIOBJ apObj[3];
    PDC_ATTR pdcattr;
    SURFACE *BitmapDest, *BitmapSrc = NULL;
    SURFACE *BitmapMask = NULL;
    RECTL DestRect;
    RECTL SourceRect;
    POINTL MaskPoint;
    BOOL Status = FALSE;
    EXLATEOBJ exlo;
    XLATEOBJ *XlateObj = NULL;
    POINTL BrushOrigin;
    BOOL UsesSource;
    BOOL UsesMask;

    FIXUP_ROP(ROP);
    UsesSource = ROP_USES_SOURCE(ROP);
    UsesMask = ROP_USES_MASK(ROP);

    if (0 == WidthDest || 0 == HeightDest || 0 == WidthSrc || 0 == HeightSrc)
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return TRUE;
    }

    if (!hDCDest || (UsesSource && !hDCSrc) || (UsesMask && !hDCMask))
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return FALSE;
    }

    ahDC[0] = hDCDest;
    ahDC[1] = UsesSource ? hDCSrc : NULL;
    ahDC[2] = UsesMask ? hDCMask : NULL;
    if (!GDIOBJ_bLockMultipleObjects(3, (HGDIOBJ*)ahDC, apObj, GDIObjType_DC_TYPE))
    {
        WARN("Invalid dc handle (dest=0x%p, src=0x%p) passed to GreStretchBltMask\n", hDCDest, hDCSrc);
        EngSetLastError(ERROR_INVALID_HANDLE);
        return FALSE;
    }
    DCDest = apObj[0];
    DCSrc = apObj[1];
    DCMask = apObj[2];

    if (DCDest->dctype == DC_TYPE_INFO)
    {
        if(DCSrc) GDIOBJ_vUnlockObject(&DCSrc->BaseObject);
        if(DCMask) GDIOBJ_vUnlockObject(&DCMask->BaseObject);
        GDIOBJ_vUnlockObject(&DCDest->BaseObject);
        /* Yes, Windows really returns TRUE in this case */
        return TRUE;
    }

    if (UsesSource)
    {
        if (DCSrc->dctype == DC_TYPE_INFO)
        {
            GDIOBJ_vUnlockObject(&DCDest->BaseObject);
            GDIOBJ_vUnlockObject(&DCSrc->BaseObject);
            if(DCMask) GDIOBJ_vUnlockObject(&DCMask->BaseObject);
            /* Yes, Windows really returns TRUE in this case */
            return TRUE;
        }
    }

    pdcattr = DCDest->pdcattr;

    DestRect.left   = XOriginDest;
    DestRect.top    = YOriginDest;
    DestRect.right  = XOriginDest+WidthDest;
    DestRect.bottom = YOriginDest+HeightDest;
    IntLPtoDP(DCDest, (LPPOINT)&DestRect, 2);

    DestRect.left   += DCDest->ptlDCOrig.x;
    DestRect.top    += DCDest->ptlDCOrig.y;
    DestRect.right  += DCDest->ptlDCOrig.x;
    DestRect.bottom += DCDest->ptlDCOrig.y;

    SourceRect.left   = XOriginSrc;
//.........这里部分代码省略.........

BOOL APIENTRY
NtGdiTransparentBlt(
    HDC hdcDst,
    INT xDst,
    INT yDst,
    INT cxDst,
    INT cyDst,
    HDC hdcSrc,
    INT xSrc,
    INT ySrc,
    INT cxSrc,
    INT cySrc,
    COLORREF TransColor)
{
    PDC DCDest, DCSrc;
    HDC ahDC[2];
    PGDIOBJ apObj[2];
    RECTL rcDest, rcSrc;
    SURFACE *BitmapDest, *BitmapSrc = NULL;
    ULONG TransparentColor = 0;
    BOOL Ret = FALSE;
    EXLATEOBJ exlo;

    if ((hdcDst == NULL) || (hdcSrc == NULL))
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return FALSE;
    }

    TRACE("Locking DCs\n");
    ahDC[0] = hdcDst;
    ahDC[1] = hdcSrc ;
    if (!GDIOBJ_bLockMultipleObjects(2, (HGDIOBJ*)ahDC, apObj, GDIObjType_DC_TYPE))
    {
        WARN("Invalid dc handle (dest=0x%p, src=0x%p) passed to NtGdiAlphaBlend\n", hdcDst, hdcSrc);
        EngSetLastError(ERROR_INVALID_HANDLE);
        return FALSE;
    }
    DCDest = apObj[0];
    DCSrc = apObj[1];

    if (DCDest->dctype == DC_TYPE_INFO || DCDest->dctype == DCTYPE_INFO)
    {
        GDIOBJ_vUnlockObject(&DCSrc->BaseObject);
        GDIOBJ_vUnlockObject(&DCDest->BaseObject);
        /* Yes, Windows really returns TRUE in this case */
        return TRUE;
    }

    rcDest.left   = xDst;
    rcDest.top    = yDst;
    rcDest.right  = rcDest.left + cxDst;
    rcDest.bottom = rcDest.top + cyDst;
    IntLPtoDP(DCDest, (LPPOINT)&rcDest, 2);

    rcDest.left   += DCDest->ptlDCOrig.x;
    rcDest.top    += DCDest->ptlDCOrig.y;
    rcDest.right  += DCDest->ptlDCOrig.x;
    rcDest.bottom += DCDest->ptlDCOrig.y;

    rcSrc.left   = xSrc;
    rcSrc.top    = ySrc;
    rcSrc.right  = rcSrc.left + cxSrc;
    rcSrc.bottom = rcSrc.top + cySrc;
    IntLPtoDP(DCSrc, (LPPOINT)&rcSrc, 2);

    rcSrc.left   += DCSrc->ptlDCOrig.x;
    rcSrc.top    += DCSrc->ptlDCOrig.y;
    rcSrc.right  += DCSrc->ptlDCOrig.x;
    rcSrc.bottom += DCSrc->ptlDCOrig.y;

    /* Prepare for blit */
    DC_vPrepareDCsForBlit(DCDest, &rcDest, DCSrc, &rcSrc);

    BitmapDest = DCDest->dclevel.pSurface;
    if (!BitmapDest)
    {
        goto done;
    }

    BitmapSrc = DCSrc->dclevel.pSurface;
    if (!BitmapSrc)
    {
        goto done;
    }

    /* Translate Transparent (RGB) Color to the source palette */
    EXLATEOBJ_vInitialize(&exlo, &gpalRGB, BitmapSrc->ppal, 0, 0, 0);
    TransparentColor = XLATEOBJ_iXlate(&exlo.xlo, (ULONG)TransColor);
    EXLATEOBJ_vCleanup(&exlo);

    EXLATEOBJ_vInitXlateFromDCs(&exlo, DCSrc, DCDest);

    Ret = IntEngTransparentBlt(&BitmapDest->SurfObj, &BitmapSrc->SurfObj,
        &DCDest->co.ClipObj, &exlo.xlo, &rcDest, &rcSrc,
        TransparentColor, 0);

    EXLATEOBJ_vCleanup(&exlo);

done:
//.........这里部分代码省略.........

HPEN
APIENTRY
IntGdiExtCreatePen(
    DWORD dwPenStyle,
    DWORD dwWidth,
    IN ULONG ulBrushStyle,
    IN ULONG ulColor,
    IN ULONG_PTR ulClientHatch,
    IN ULONG_PTR ulHatch,
    DWORD dwStyleCount,
    PULONG pStyle,
    IN ULONG cjDIB,
    IN BOOL bOldStylePen,
    IN OPTIONAL HBRUSH hbrush)
{
    HPEN hPen;
    PBRUSH pbrushPen;
    static const BYTE PatternAlternate[] = {0x55, 0x55, 0x55, 0};
    static const BYTE PatternDash[] = {0xFF, 0xFF, 0xC0, 0};
    static const BYTE PatternDot[] = {0xE3, 0x8E, 0x38, 0};
    static const BYTE PatternDashDot[] = {0xFF, 0x81, 0xC0, 0};
    static const BYTE PatternDashDotDot[] = {0xFF, 0x8E, 0x38, 0};

    dwWidth = abs(dwWidth);

    if ( (dwPenStyle & PS_STYLE_MASK) == PS_NULL)
    {
        return StockObjects[NULL_PEN];
    }

    if (bOldStylePen)
    {
        pbrushPen = PEN_AllocPenWithHandle();
    }
    else
    {
        pbrushPen = PEN_AllocExtPenWithHandle();
    }

    if (!pbrushPen)
    {
        EngSetLastError(ERROR_NOT_ENOUGH_MEMORY);
        DPRINT("Can't allocate pen\n");
        return 0;
    }
    hPen = pbrushPen->BaseObject.hHmgr;

    // If nWidth is zero, the pen is a single pixel wide, regardless of the current transformation.
    if ((bOldStylePen) && (!dwWidth) && ((dwPenStyle & PS_STYLE_MASK) != PS_SOLID))
        dwWidth = 1;

    pbrushPen->lWidth = dwWidth;
    pbrushPen->eWidth = (FLOAT)pbrushPen->lWidth;
    pbrushPen->ulPenStyle = dwPenStyle;
    pbrushPen->BrushAttr.lbColor = ulColor;
    pbrushPen->iBrushStyle = ulBrushStyle;
    // FIXME: Copy the bitmap first ?
    pbrushPen->hbmClient = (HANDLE)ulClientHatch;
    pbrushPen->dwStyleCount = dwStyleCount;
    pbrushPen->pStyle = pStyle;

    pbrushPen->flAttrs = bOldStylePen ? BR_IS_OLDSTYLEPEN : BR_IS_PEN;

    // If dwPenStyle is PS_COSMETIC, the width must be set to 1.
    if ( !(bOldStylePen) && ((dwPenStyle & PS_TYPE_MASK) == PS_COSMETIC) && ( dwWidth != 1) )
        goto ExitCleanup;

    switch (dwPenStyle & PS_STYLE_MASK)
    {
    case PS_NULL:
        pbrushPen->flAttrs |= BR_IS_NULL;
        break;

    case PS_SOLID:
        pbrushPen->flAttrs |= BR_IS_SOLID;
        break;

    case PS_ALTERNATE:
        pbrushPen->flAttrs |= BR_IS_BITMAP;
        pbrushPen->hbmPattern = GreCreateBitmap(24, 1, 1, 1, (LPBYTE)PatternAlternate);
        break;

    case PS_DOT:
        pbrushPen->flAttrs |= BR_IS_BITMAP;
        pbrushPen->hbmPattern = GreCreateBitmap(24, 1, 1, 1, (LPBYTE)PatternDot);
        break;

    case PS_DASH:
        pbrushPen->flAttrs |= BR_IS_BITMAP;
        pbrushPen->hbmPattern = GreCreateBitmap(24, 1, 1, 1, (LPBYTE)PatternDash);
        break;

    case PS_DASHDOT:
        pbrushPen->flAttrs |= BR_IS_BITMAP;
        pbrushPen->hbmPattern = GreCreateBitmap(24, 1, 1, 1, (LPBYTE)PatternDashDot);
        break;

    case PS_DASHDOTDOT:
        pbrushPen->flAttrs |= BR_IS_BITMAP;
        pbrushPen->hbmPattern = GreCreateBitmap(24, 1, 1, 1, (LPBYTE)PatternDashDotDot);
//.........这里部分代码省略.........

HPEN
APIENTRY
NtGdiExtCreatePen(
    DWORD dwPenStyle,
    DWORD ulWidth,
    IN ULONG ulBrushStyle,
    IN ULONG ulColor,
    IN ULONG_PTR ulClientHatch,
    IN ULONG_PTR ulHatch,
    DWORD dwStyleCount,
    PULONG pUnsafeStyle,
    IN ULONG cjDIB,
    IN BOOL bOldStylePen,
    IN OPTIONAL HBRUSH hBrush)
{
    NTSTATUS Status = STATUS_SUCCESS;
    DWORD* pSafeStyle = NULL;
    HPEN hPen;

    if ((int)dwStyleCount < 0) return 0;
    if (dwStyleCount > 16)
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return 0;
    }

    if (dwStyleCount > 0)
    {
        if (pUnsafeStyle == NULL)
        {
            EngSetLastError(ERROR_INVALID_PARAMETER);
            return 0;
        }

        pSafeStyle = ExAllocatePoolWithTag(NonPagedPool,
                                           dwStyleCount * sizeof(DWORD),
                                           GDITAG_PENSTYLE);
        if (!pSafeStyle)
        {
            SetLastNtError(ERROR_NOT_ENOUGH_MEMORY);
            return 0;
        }
        _SEH2_TRY
        {
            ProbeForRead(pUnsafeStyle, dwStyleCount * sizeof(DWORD), 1);
            RtlCopyMemory(pSafeStyle,
            pUnsafeStyle,
            dwStyleCount * sizeof(DWORD));
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            Status = _SEH2_GetExceptionCode();
        }
        _SEH2_END
        if(!NT_SUCCESS(Status))
        {
            SetLastNtError(Status);
            ExFreePoolWithTag(pSafeStyle, GDITAG_PENSTYLE);
            return 0;
        }
    }

    if (ulBrushStyle == BS_PATTERN)
    {
        _SEH2_TRY
        {
            ProbeForRead((PVOID)ulHatch, cjDIB, 1);
        }
        _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
        {
            Status = _SEH2_GetExceptionCode();
        }
        _SEH2_END
        if(!NT_SUCCESS(Status))
        {
            SetLastNtError(Status);
            if (pSafeStyle) ExFreePoolWithTag(pSafeStyle, GDITAG_PENSTYLE);
            return 0;
        }
    }

HANDLE APIENTRY
NtUserGetClipboardData(UINT fmt, PGETCLIPBDATA pgcd)
{
    HANDLE hRet = NULL;
    PCLIP pElement;
    PWINSTATION_OBJECT pWinStaObj = NULL;

    TRACE("NtUserGetClipboardData(%x, %p)\n", fmt, pgcd);

    UserEnterShared();

    pWinStaObj = IntGetWinStaForCbAccess();
    if (!pWinStaObj)
        goto cleanup;

    if (!IntIsClipboardOpenByMe(pWinStaObj))
    {
        EngSetLastError(ERROR_CLIPBOARD_NOT_OPEN);
        goto cleanup;
    }

    pElement = IntIsFormatAvailable(pWinStaObj, fmt);
    if (pElement && IS_DATA_DELAYED(pElement) && pWinStaObj->spwndClipOwner)
    {
        /* Send WM_RENDERFORMAT message */
        pWinStaObj->fInDelayedRendering = TRUE;
        co_IntSendMessage(pWinStaObj->spwndClipOwner->head.h, WM_RENDERFORMAT, (WPARAM)fmt, 0);
        pWinStaObj->fInDelayedRendering = FALSE;

        /* Data should be in clipboard now */
        pElement = IntIsFormatAvailable(pWinStaObj, fmt);
    }

    if (!pElement || IS_DATA_DELAYED(pElement))
        goto cleanup;


    if (IS_DATA_SYNTHESIZED(pElement))
    {
        /* Note: Data is synthesized in usermode */
        /* TODO: Add more formats */
        switch (fmt)
        {
            case CF_UNICODETEXT:
            case CF_TEXT:
            case CF_OEMTEXT:
                pElement = IntIsFormatAvailable(pWinStaObj, CF_UNICODETEXT);
                if (IS_DATA_SYNTHESIZED(pElement))
                    pElement = IntIsFormatAvailable(pWinStaObj, CF_TEXT);
                if (IS_DATA_SYNTHESIZED(pElement))
                    pElement = IntIsFormatAvailable(pWinStaObj, CF_OEMTEXT);
                break;
            case CF_BITMAP:
                IntSynthesizeBitmap(pWinStaObj, pElement);
                break;
            default:
                ASSERT(FALSE);
        }
    }

    _SEH2_TRY
    {
        ProbeForWrite(pgcd, sizeof(*pgcd), 1);
        pgcd->uFmtRet = pElement->fmt;
        pgcd->fGlobalHandle = pElement->fGlobalHandle;

        /* Text and bitmap needs more data */
        if (fmt == CF_TEXT)
        {
            PCLIP pLocaleEl;

            pLocaleEl = IntIsFormatAvailable(pWinStaObj, CF_LOCALE);
            if (pLocaleEl && !IS_DATA_DELAYED(pLocaleEl))
                pgcd->hLocale = pLocaleEl->hData;
        }
        else if (fmt == CF_BITMAP)
        {
            PCLIP pPaletteEl;

            pPaletteEl = IntIsFormatAvailable(pWinStaObj, CF_PALETTE);
            if (pPaletteEl && !IS_DATA_DELAYED(pPaletteEl))
                pgcd->hPalette = pPaletteEl->hData;
        }

        hRet = pElement->hData;
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        SetLastNtError(_SEH2_GetExceptionCode());
    }
    _SEH2_END;

cleanup:
    if(pWinStaObj)
        ObDereferenceObject(pWinStaObj);

    UserLeave();

    TRACE("NtUserGetClipboardData returns %p\n", hRet);

//.........这里部分代码省略.........

INT
APIENTRY
NtGdiDescribePixelFormat(HDC  hDC,
                         INT  PixelFormat,
                         UINT  BufSize,
                         LPPIXELFORMATDESCRIPTOR  pfd)
{
    PDC pdc;
    PPDEVOBJ ppdev;
    INT Ret = 0;
    PIXELFORMATDESCRIPTOR pfdSafe;
    NTSTATUS Status = STATUS_SUCCESS;

    if (!BufSize) return 0;

    pdc = DC_LockDc(hDC);
    if (!pdc)
    {
        EngSetLastError(ERROR_INVALID_HANDLE);
        return 0;
    }

    if (!pdc->ipfdDevMax) IntGetipfdDevMax(pdc);

    if ( BufSize < sizeof(PIXELFORMATDESCRIPTOR) ||
            PixelFormat < 1 ||
            PixelFormat > pdc->ipfdDevMax )
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        goto Exit;
    }

    ppdev = pdc->ppdev;

    if (ppdev->flFlags & PDEV_META_DEVICE)
    {
        UNIMPLEMENTED;
        goto Exit;
    }

    if (ppdev->DriverFunctions.DescribePixelFormat)
    {
        Ret = ppdev->DriverFunctions.DescribePixelFormat(
                  ppdev->dhpdev,
                  PixelFormat,
                  sizeof(PIXELFORMATDESCRIPTOR),
                  &pfdSafe);
    }

    _SEH2_TRY
    {
        ProbeForWrite( pfd,
        sizeof(PIXELFORMATDESCRIPTOR),
        1);
        RtlCopyMemory(&pfdSafe, pfd, sizeof(PIXELFORMATDESCRIPTOR));
    }
    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
    {
        Status = _SEH2_GetExceptionCode();
    }
    _SEH2_END;

    if (!NT_SUCCESS(Status)) SetLastNtError(Status);

Exit:
    DC_UnlockDc(pdc);
    return Ret;
}

BOOL APIENTRY
NtGdiExtFloodFill(
    HDC  hDC,
    INT  XStart,
    INT  YStart,
    COLORREF  Color,
    UINT  FillType)
{
    PDC dc;
#if 0
    PDC_ATTR   pdcattr;
#endif
    SURFACE    *psurf;
    EXLATEOBJ  exlo;
    BOOL       Ret = FALSE;
    RECTL      DestRect;
    POINTL     Pt;
    ULONG      ConvColor;

    dc = DC_LockDc(hDC);
    if (!dc)
    {
        EngSetLastError(ERROR_INVALID_HANDLE);
        return FALSE;
    }
    if (dc->dctype == DC_TYPE_INFO)
    {
        DC_UnlockDc(dc);
        /* Yes, Windows really returns TRUE in this case */
        return TRUE;
    }

    if (!dc->dclevel.pSurface)
    {
        Ret = FALSE;
        goto cleanup;
    }

#if 0
    pdcattr = dc->pdcattr;
#endif

    Pt.x = XStart;
    Pt.y = YStart;
    IntLPtoDP(dc, (LPPOINT)&Pt, 1);

    DC_vPrepareDCsForBlit(dc, &DestRect, NULL, NULL);

    /// FIXME: what about prgnVIS? And what about REAL clipping?
    psurf = dc->dclevel.pSurface;
    if (dc->prgnRao)
    {
        Ret = REGION_PtInRegion(dc->prgnRao, Pt.x, Pt.y);
        if (Ret)
            REGION_GetRgnBox(dc->prgnRao, (LPRECT)&DestRect);
        else
        {
            DC_vFinishBlit(dc, NULL);
            goto cleanup;
        }
    }
    else
    {
        RECTL_vSetRect(&DestRect, 0, 0, psurf->SurfObj.sizlBitmap.cx, psurf->SurfObj.sizlBitmap.cy);
    }

    EXLATEOBJ_vInitialize(&exlo, &gpalRGB, psurf->ppal, 0, 0xffffff, 0);

    /* Only solid fills supported for now
     * How to support pattern brushes and non standard surfaces (not offering dib functions):
     * Version a (most likely slow): call DrvPatBlt for every pixel
     * Version b: create a flood mask and let MaskBlt blit a masked brush */
    ConvColor = XLATEOBJ_iXlate(&exlo.xlo, Color);
    Ret = DIB_XXBPP_FloodFillSolid(&psurf->SurfObj, &dc->eboFill.BrushObject, &DestRect, &Pt, ConvColor, FillType);

    DC_vFinishBlit(dc, NULL);

    EXLATEOBJ_vCleanup(&exlo);

cleanup:
    DC_UnlockDc(dc);
    return Ret;
}

BOOL APIENTRY
NtGdiAlphaBlend(
    HDC hDCDest,
    LONG XOriginDest,
    LONG YOriginDest,
    LONG WidthDest,
    LONG HeightDest,
    HDC hDCSrc,
    LONG XOriginSrc,
    LONG YOriginSrc,
    LONG WidthSrc,
    LONG HeightSrc,
    BLENDFUNCTION BlendFunc,
    HANDLE hcmXform)
{
    PDC DCDest;
    PDC DCSrc;
    HDC ahDC[2];
    PGDIOBJ apObj[2];
    SURFACE *BitmapDest, *BitmapSrc;
    RECTL DestRect, SourceRect;
    BOOL bResult;
    EXLATEOBJ exlo;
    BLENDOBJ BlendObj;
    BlendObj.BlendFunction = BlendFunc;

    if (WidthDest < 0 || HeightDest < 0 || WidthSrc < 0 || HeightSrc < 0)
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return FALSE;
    }

    if ((hDCDest == NULL) || (hDCSrc == NULL))
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return FALSE;
    }

    TRACE("Locking DCs\n");
    ahDC[0] = hDCDest;
    ahDC[1] = hDCSrc ;
    if (!GDIOBJ_bLockMultipleObjects(2, (HGDIOBJ*)ahDC, apObj, GDIObjType_DC_TYPE))
    {
        WARN("Invalid dc handle (dest=0x%p, src=0x%p) passed to NtGdiAlphaBlend\n", hDCDest, hDCSrc);
        EngSetLastError(ERROR_INVALID_HANDLE);
        return FALSE;
    }
    DCDest = apObj[0];
    DCSrc = apObj[1];

    if (DCDest->dctype == DC_TYPE_INFO || DCDest->dctype == DCTYPE_INFO)
    {
        GDIOBJ_vUnlockObject(&DCSrc->BaseObject);
        GDIOBJ_vUnlockObject(&DCDest->BaseObject);
        /* Yes, Windows really returns TRUE in this case */
        return TRUE;
    }

    DestRect.left   = XOriginDest;
    DestRect.top    = YOriginDest;
    DestRect.right  = XOriginDest + WidthDest;
    DestRect.bottom = YOriginDest + HeightDest;
    IntLPtoDP(DCDest, (LPPOINT)&DestRect, 2);

    DestRect.left   += DCDest->ptlDCOrig.x;
    DestRect.top    += DCDest->ptlDCOrig.y;
    DestRect.right  += DCDest->ptlDCOrig.x;
    DestRect.bottom += DCDest->ptlDCOrig.y;

    SourceRect.left   = XOriginSrc;
    SourceRect.top    = YOriginSrc;
    SourceRect.right  = XOriginSrc + WidthSrc;
    SourceRect.bottom = YOriginSrc + HeightSrc;
    IntLPtoDP(DCSrc, (LPPOINT)&SourceRect, 2);

    SourceRect.left   += DCSrc->ptlDCOrig.x;
    SourceRect.top    += DCSrc->ptlDCOrig.y;
    SourceRect.right  += DCSrc->ptlDCOrig.x;
    SourceRect.bottom += DCSrc->ptlDCOrig.y;

    if (!DestRect.right ||
        !DestRect.bottom ||
        !SourceRect.right ||
        !SourceRect.bottom)
    {
        GDIOBJ_vUnlockObject(&DCSrc->BaseObject);
        GDIOBJ_vUnlockObject(&DCDest->BaseObject);
        return TRUE;
    }

    /* Prepare DCs for blit */
    TRACE("Preparing DCs for blit\n");
    DC_vPrepareDCsForBlit(DCDest, &DestRect, DCSrc, &SourceRect);

    /* Determine surfaces to be used in the bitblt */
    BitmapDest = DCDest->dclevel.pSurface;
    if (!BitmapDest)
    {
        bResult = FALSE ;
        goto leave ;
//.........这里部分代码省略.........

/*
 * @unimplemented
 */
DWORD_PTR
APIENTRY
NtUserCallNoParam(DWORD Routine)
{
   DWORD_PTR Result = 0;
   DECLARE_RETURN(DWORD_PTR);

   TRACE("Enter NtUserCallNoParam\n");
   UserEnterExclusive();

   switch(Routine)
   {
      case NOPARAM_ROUTINE_CREATEMENU:
         Result = (DWORD_PTR)UserCreateMenu(FALSE);
         break;

      case NOPARAM_ROUTINE_CREATEMENUPOPUP:
         Result = (DWORD_PTR)UserCreateMenu(TRUE);
         break;

      case NOPARAM_ROUTINE_DESTROY_CARET:
         Result = (DWORD_PTR)co_IntDestroyCaret(PsGetCurrentThread()->Tcb.Win32Thread);
         break;

      case NOPARAM_ROUTINE_INIT_MESSAGE_PUMP:
         Result = (DWORD_PTR)IntInitMessagePumpHook();
         break;

      case NOPARAM_ROUTINE_UNINIT_MESSAGE_PUMP:
         Result = (DWORD_PTR)IntUninitMessagePumpHook();
         break;

      case NOPARAM_ROUTINE_GETMESSAGEEXTRAINFO:
         Result = (DWORD_PTR)MsqGetMessageExtraInfo();
         break;

      case NOPARAM_ROUTINE_MSQCLEARWAKEMASK:
         RETURN( (DWORD_PTR)IntMsqClearWakeMask());

      case NOPARAM_ROUTINE_GETMSESSAGEPOS:
      {
         PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
         RETURN( (DWORD_PTR)MAKELONG(pti->ptLast.x, pti->ptLast.y));
      }

      case NOPARAM_ROUTINE_RELEASECAPTURE:
         RETURN( (DWORD_PTR)IntReleaseCapture());

      case NOPARAM_ROUTINE_LOADUSERAPIHOOK:
         RETURN(UserLoadApiHook());

      case NOPARAM_ROUTINE_ZAPACTIVEANDFOUS:
      {
         PTHREADINFO pti = PsGetCurrentThreadWin32Thread();
         TRACE("Zapping the Active and Focus window out of the Queue!\n");
         pti->MessageQueue->spwndFocus = NULL;
         pti->MessageQueue->spwndActive = NULL;
         RETURN(0);
      }

      /* this is a Reactos only case and is needed for gui-on-demand */
      case NOPARAM_ROUTINE_ISCONSOLEMODE:
          RETURN( ScreenDeviceContext == NULL );

      default:
         ERR("Calling invalid routine number 0x%x in NtUserCallNoParam\n", Routine);
         EngSetLastError(ERROR_INVALID_PARAMETER);
         break;
   }
   RETURN(Result);

CLEANUP:
   TRACE("Leave NtUserCallNoParam, ret=%p\n",(PVOID)_ret_);
   UserLeave();
   END_CLEANUP;
}

BOOL APIENTRY
NtGdiMaskBlt(
    HDC hdcDest,
    INT nXDest,
    INT nYDest,
    INT nWidth,
    INT nHeight,
    HDC hdcSrc,
    INT nXSrc,
    INT nYSrc,
    HBITMAP hbmMask,
    INT xMask,
    INT yMask,
    DWORD dwRop,
    IN DWORD crBackColor)
{
    PDC DCDest;
    PDC DCSrc = NULL;
    HDC ahDC[2];
    PGDIOBJ apObj[2];
    PDC_ATTR pdcattr = NULL;
    SURFACE *BitmapDest, *BitmapSrc = NULL, *psurfMask = NULL;
    RECTL DestRect, SourceRect;
    POINTL SourcePoint, MaskPoint;
    BOOL Status = FALSE;
    EXLATEOBJ exlo;
    XLATEOBJ *XlateObj = NULL;
    BOOL UsesSource;

    FIXUP_ROP(dwRop); // FIXME: why do we need this???

    //DPRINT1("dwRop : 0x%08x\n", dwRop);
    UsesSource = ROP_USES_SOURCE(dwRop);
    if (!hdcDest || (UsesSource && !hdcSrc))
    {
        EngSetLastError(ERROR_INVALID_PARAMETER);
        return FALSE;
    }

    /* Check if we need a mask and have a mask bitmap */
    if (ROP_USES_MASK(dwRop) && (hbmMask != NULL))
    {
        /* Reference the mask bitmap */
        psurfMask = SURFACE_ShareLockSurface(hbmMask);
        if (psurfMask == NULL)
        {
            EngSetLastError(ERROR_INVALID_HANDLE);
            return FALSE;
        }

        /* Make sure the mask bitmap is 1 BPP */
        if (gajBitsPerFormat[psurfMask->SurfObj.iBitmapFormat] != 1)
        {
            EngSetLastError(ERROR_INVALID_PARAMETER);
            SURFACE_ShareUnlockSurface(psurfMask);
            return FALSE;
        }
    }
    else
    {
        /* We use NULL, if we need a mask, the Eng function will take care of
           that and use the brushobject to get a mask */
        psurfMask = NULL;
    }

    MaskPoint.x = xMask;
    MaskPoint.y = yMask;

    /* Take care of source and destination bitmap */
    TRACE("Locking DCs\n");
    ahDC[0] = hdcDest;
    ahDC[1] = UsesSource ? hdcSrc : NULL;
    if (!GDIOBJ_bLockMultipleObjects(2, (HGDIOBJ*)ahDC, apObj, GDIObjType_DC_TYPE))
    {
        WARN("Invalid dc handle (dest=0x%p, src=0x%p) passed to NtGdiAlphaBlend\n", hdcDest, hdcSrc);
        EngSetLastError(ERROR_INVALID_HANDLE);
        return FALSE;
    }
    DCDest = apObj[0];
    DCSrc = apObj[1];

    ASSERT(DCDest);
    if (NULL == DCDest)
    {
        if(DCSrc) DC_UnlockDc(DCSrc);
        WARN("Invalid destination dc handle (0x%p) passed to NtGdiBitBlt\n", hdcDest);
        return FALSE;
    }

    if (DCDest->dctype == DC_TYPE_INFO)
    {
        if(DCSrc) DC_UnlockDc(DCSrc);
        DC_UnlockDc(DCDest);
        /* Yes, Windows really returns TRUE in this case */
        return TRUE;
    }

    if (UsesSource)
    {
        ASSERT(DCSrc);
//.........这里部分代码省略.........