2 * ReactOS W32 Subsystem
3 * Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 * COPYRIGHT: See COPYING in the top level directory
22 * PROJECT: ReactOS kernel
23 * PURPOSE: Window classes
24 * FILE: subsys/win32k/ntuser/class.c
25 * PROGRAMER: Casper S. Hornstrup (chorns@users.sourceforge.net)
27 * 06-06-2001 CSH Created
30 /* INCLUDES ******************************************************************/
37 /* GLOBALS *******************************************************************/
39 /* NOTE - I think we should store this per window station (including gdi objects) */
41 static PDCE FirstDce
= NULL
;
42 static HDC defaultDCstate
;
44 #define DCX_CACHECOMPAREMASK (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | \
45 DCX_CACHE | DCX_WINDOW | DCX_PARENTCLIP)
47 /* FUNCTIONS *****************************************************************/
57 DceGetVisRgn(PWINDOW_OBJECT Window
, ULONG Flags
, HWND hWndChild
, ULONG CFlags
)
61 VisRgn
= VIS_ComputeVisibleRegion(Window
,
62 0 == (Flags
& DCX_WINDOW
),
63 0 != (Flags
& DCX_CLIPCHILDREN
),
64 0 != (Flags
& DCX_CLIPSIBLINGS
));
67 VisRgn
= NtGdiCreateRectRgn(0, 0, 0, 0);
75 * The NtUserGetWindowDC function retrieves the device context (DC) for the
76 * entire window, including title bar, menus, and scroll bars. A window device
77 * context permits painting anywhere in a window, because the origin of the
78 * device context is the upper-left corner of the window instead of the client
86 NtUserGetWindowDC(HWND hWnd
)
88 return (DWORD
)NtUserGetDCEx(hWnd
, 0, DCX_USESTYLE
| DCX_WINDOW
);
92 UserGetWindowDC(PWINDOW_OBJECT Wnd
)
94 return (DWORD
)UserGetDCEx(Wnd
, 0, DCX_USESTYLE
| DCX_WINDOW
);
98 NtUserGetDC(HWND hWnd
)
100 return NtUserGetDCEx(hWnd
, NULL
, NULL
== hWnd
? DCX_CACHE
| DCX_WINDOW
: DCX_USESTYLE
);
104 DceAllocDCE(PWINDOW_OBJECT Window OPTIONAL
, DCE_TYPE Type
)
108 UNICODE_STRING DriverName
;
110 DceHandle
= DCEOBJ_AllocDCE();
114 RtlInitUnicodeString(&DriverName
, L
"DISPLAY");
116 Dce
= DCEOBJ_LockDCE(DceHandle
);
117 /* No real locking, just get the pointer */
118 DCEOBJ_UnlockDCE(Dce
);
119 Dce
->Self
= DceHandle
;
120 Dce
->hDC
= IntGdiCreateDC(&DriverName
, NULL
, NULL
, NULL
, FALSE
);
121 if (NULL
== defaultDCstate
)
123 defaultDCstate
= NtGdiGetDCState(Dce
->hDC
);
124 DC_SetOwnership(defaultDCstate
, NULL
);
126 GDIOBJ_SetOwnership(Dce
->Self
, NULL
);
127 DC_SetOwnership(Dce
->hDC
, NULL
);
128 Dce
->hwndCurrent
= (Window
? Window
->hSelf
: NULL
);
129 Dce
->hClipRgn
= NULL
;
131 Dce
->next
= FirstDce
;
134 if (Type
!= DCE_CACHE_DC
)
136 Dce
->DCXFlags
= DCX_DCEBUSY
;
140 if (Window
->Style
& WS_CLIPCHILDREN
)
142 Dce
->DCXFlags
|= DCX_CLIPCHILDREN
;
144 if (Window
->Style
& WS_CLIPSIBLINGS
)
146 Dce
->DCXFlags
|= DCX_CLIPSIBLINGS
;
152 Dce
->DCXFlags
= DCX_CACHE
| DCX_DCEEMPTY
;
159 DceSetDrawable(PWINDOW_OBJECT Window OPTIONAL
, HDC hDC
, ULONG Flags
,
162 DC
*dc
= DC_LockDc(hDC
);
173 if (Flags
& DCX_WINDOW
)
175 dc
->w
.DCOrgX
= Window
->WindowRect
.left
;
176 dc
->w
.DCOrgY
= Window
->WindowRect
.top
;
180 dc
->w
.DCOrgX
= Window
->ClientRect
.left
;
181 dc
->w
.DCOrgY
= Window
->ClientRect
.top
;
189 DceDeleteClipRgn(DCE
* Dce
)
191 Dce
->DCXFlags
&= ~(DCX_EXCLUDERGN
| DCX_INTERSECTRGN
);
193 if (Dce
->DCXFlags
& DCX_KEEPCLIPRGN
)
195 Dce
->DCXFlags
&= ~DCX_KEEPCLIPRGN
;
197 else if (Dce
->hClipRgn
!= NULL
)
199 NtGdiDeleteObject(Dce
->hClipRgn
);
202 Dce
->hClipRgn
= NULL
;
204 /* make it dirty so that the vis rgn gets recomputed next time */
205 Dce
->DCXFlags
|= DCX_DCEDIRTY
;
209 DceReleaseDC(DCE
* dce
, BOOL EndPaint
)
211 if (DCX_DCEBUSY
!= (dce
->DCXFlags
& (DCX_DCEEMPTY
| DCX_DCEBUSY
)))
216 /* restore previous visible region */
218 if ((dce
->DCXFlags
& (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
)) &&
219 ((dce
->DCXFlags
& DCX_CACHE
) || EndPaint
))
221 DceDeleteClipRgn(dce
);
224 if (dce
->DCXFlags
& DCX_CACHE
)
226 /* make the DC clean so that SetDCState doesn't try to update the vis rgn */
227 NtGdiSetHookFlags(dce
->hDC
, DCHF_VALIDATEVISRGN
);
228 NtGdiSetDCState(dce
->hDC
, defaultDCstate
);
229 dce
->DCXFlags
&= ~DCX_DCEBUSY
;
230 if (dce
->DCXFlags
& DCX_DCEDIRTY
)
232 /* don't keep around invalidated entries
233 * because SetDCState() disables hVisRgn updates
234 * by removing dirty bit. */
235 dce
->hwndCurrent
= 0;
236 dce
->DCXFlags
&= DCX_CACHE
;
237 dce
->DCXFlags
|= DCX_DCEEMPTY
;
245 DceUpdateVisRgn(DCE
*Dce
, PWINDOW_OBJECT Window
, ULONG Flags
)
247 HANDLE hRgnVisible
= NULL
;
249 PWINDOW_OBJECT DesktopWindow
;
251 if (Flags
& DCX_PARENTCLIP
)
253 PWINDOW_OBJECT Parent
;
255 Parent
= Window
->Parent
;
262 if (Parent
->Style
& WS_CLIPSIBLINGS
)
264 DcxFlags
= DCX_CLIPSIBLINGS
|
265 (Flags
& ~(DCX_CLIPCHILDREN
| DCX_WINDOW
));
269 DcxFlags
= Flags
& ~(DCX_CLIPSIBLINGS
| DCX_CLIPCHILDREN
| DCX_WINDOW
);
271 hRgnVisible
= DceGetVisRgn(Parent
, DcxFlags
, Window
->hSelf
, Flags
);
273 else if (Window
== NULL
)
275 DesktopWindow
= UserGetWindowObject(IntGetDesktopWindow());
276 if (NULL
!= DesktopWindow
)
278 hRgnVisible
= UnsafeIntCreateRectRgnIndirect(&DesktopWindow
->WindowRect
);
287 hRgnVisible
= DceGetVisRgn(Window
, Flags
, 0, 0);
291 if (Flags
& DCX_INTERSECTRGN
)
293 if(Dce
->hClipRgn
!= NULL
)
295 NtGdiCombineRgn(hRgnVisible
, hRgnVisible
, Dce
->hClipRgn
, RGN_AND
);
299 if(hRgnVisible
!= NULL
)
301 NtGdiDeleteObject(hRgnVisible
);
303 hRgnVisible
= NtGdiCreateRectRgn(0, 0, 0, 0);
307 if (Flags
& DCX_EXCLUDERGN
&& Dce
->hClipRgn
!= NULL
)
309 NtGdiCombineRgn(hRgnVisible
, hRgnVisible
, Dce
->hClipRgn
, RGN_DIFF
);
312 Dce
->DCXFlags
&= ~DCX_DCEDIRTY
;
313 NtGdiSelectVisRgn(Dce
->hDC
, hRgnVisible
);
317 IntEngWindowChanged(Window
, WOC_RGN_CLIENT
);
320 if (hRgnVisible
!= NULL
)
322 NtGdiDeleteObject(hRgnVisible
);
327 UserGetDCEx(PWINDOW_OBJECT Window OPTIONAL
, HANDLE ClipRegion
, ULONG Flags
)
329 PWINDOW_OBJECT Parent
;
332 BOOL UpdateVisRgn
= TRUE
;
333 BOOL UpdateClipOrigin
= FALSE
;
337 Flags
&= ~DCX_USESTYLE
;
340 if (NULL
== Window
|| NULL
== Window
->Dce
)
345 if (Flags
& DCX_USESTYLE
)
347 Flags
&= ~(DCX_CLIPCHILDREN
| DCX_CLIPSIBLINGS
| DCX_PARENTCLIP
);
349 if (Window
->Style
& WS_CLIPSIBLINGS
)
351 Flags
|= DCX_CLIPSIBLINGS
;
354 if (!(Flags
& DCX_WINDOW
))
356 if (Window
->Class
->style
& CS_PARENTDC
)
358 Flags
|= DCX_PARENTCLIP
;
361 if (Window
->Style
& WS_CLIPCHILDREN
&&
362 !(Window
->Style
& WS_MINIMIZE
))
364 Flags
|= DCX_CLIPCHILDREN
;
373 if (Flags
& DCX_NOCLIPCHILDREN
)
376 Flags
|= ~(DCX_PARENTCLIP
| DCX_CLIPCHILDREN
);
379 if (Flags
& DCX_WINDOW
)
381 Flags
= (Flags
& ~DCX_CLIPCHILDREN
) | DCX_CACHE
;
384 Parent
= (Window
? Window
->Parent
: NULL
);
386 if (NULL
== Window
|| !(Window
->Style
& WS_CHILD
) || NULL
== Parent
)
388 Flags
&= ~DCX_PARENTCLIP
;
390 else if (Flags
& DCX_PARENTCLIP
)
393 if ((Window
->Style
& WS_VISIBLE
) &&
394 (Parent
->Style
& WS_VISIBLE
))
396 Flags
&= ~DCX_CLIPCHILDREN
;
397 if (Parent
->Style
& WS_CLIPSIBLINGS
)
399 Flags
|= DCX_CLIPSIBLINGS
;
404 DcxFlags
= Flags
& DCX_CACHECOMPAREMASK
;
406 if (Flags
& DCX_CACHE
)
408 DCE
* DceEmpty
= NULL
;
409 DCE
* DceUnused
= NULL
;
411 for (Dce
= FirstDce
; Dce
!= NULL
; Dce
= Dce
->next
)
413 if ((Dce
->DCXFlags
& (DCX_CACHE
| DCX_DCEBUSY
)) == DCX_CACHE
)
416 if (Dce
->DCXFlags
& DCX_DCEEMPTY
)
420 else if (Dce
->hwndCurrent
== (Window
? Window
->hSelf
: NULL
) &&
421 ((Dce
->DCXFlags
& DCX_CACHECOMPAREMASK
) == DcxFlags
))
424 UpdateVisRgn
= FALSE
;
427 UpdateClipOrigin
= TRUE
;
436 Dce
= (DceEmpty
== NULL
) ? DceUnused
: DceEmpty
;
441 Dce
= DceAllocDCE(NULL
, DCE_CACHE_DC
);
447 if (NULL
!= Dce
&& Dce
->hwndCurrent
== (Window
? Window
->hSelf
: NULL
))
449 UpdateVisRgn
= FALSE
; /* updated automatically, via DCHook() */
462 Dce
->hwndCurrent
= (Window
? Window
->hSelf
: NULL
);
463 Dce
->DCXFlags
= Flags
| DCX_DCEBUSY
;
465 if (0 == (Flags
& (DCX_EXCLUDERGN
| DCX_INTERSECTRGN
)) && NULL
!= ClipRegion
)
467 if (Flags
& DCX_KEEPCLIPRGN
)
468 NtGdiDeleteObject(ClipRegion
);
473 if (NULL
!= Dce
->hClipRgn
)
475 DceDeleteClipRgn(Dce
);
476 Dce
->hClipRgn
= NULL
;
480 if (0 != (Flags
& DCX_INTERSECTUPDATE
) && NULL
== ClipRegion
)
482 Flags
|= DCX_INTERSECTRGN
| DCX_KEEPCLIPRGN
;
483 Dce
->DCXFlags
|= DCX_INTERSECTRGN
| DCX_KEEPCLIPRGN
;
484 ClipRegion
= Window
->UpdateRegion
;
487 if (ClipRegion
== (HRGN
) 1)
489 if (!(Flags
& DCX_WINDOW
))
491 Dce
->hClipRgn
= UnsafeIntCreateRectRgnIndirect(&Window
->ClientRect
);
495 Dce
->hClipRgn
= UnsafeIntCreateRectRgnIndirect(&Window
->WindowRect
);
498 else if (ClipRegion
!= NULL
)
500 Dce
->hClipRgn
= ClipRegion
;
503 DceSetDrawable(Window
, Dce
->hDC
, Flags
, UpdateClipOrigin
);
507 DceUpdateVisRgn(Dce
, Window
, Flags
);
516 NtUserGetDCEx(HWND hWnd OPTIONAL
, HANDLE ClipRegion
, ULONG Flags
)
518 PWINDOW_OBJECT Wnd
=NULL
;
521 DPRINT("Enter NtUserGetDCEx\n");
522 UserEnterExclusive();
524 if (hWnd
&& !(Wnd
= UserGetWindowObject(hWnd
)))
529 RETURN( UserGetDCEx(Wnd
, ClipRegion
, Flags
));
532 DPRINT("Leave NtUserGetDCEx, ret=%i\n",_ret_
);
540 DCE_Cleanup(PVOID ObjectBody
)
543 PDCE pDce
= (PDCE
)ObjectBody
;
545 if (pDce
== FirstDce
)
547 FirstDce
= pDce
->next
;
552 for (PrevInList
= FirstDce
; NULL
!= PrevInList
; PrevInList
= PrevInList
->next
)
554 if (pDce
== PrevInList
->next
)
556 PrevInList
->next
= pDce
->next
;
560 assert(NULL
!= PrevInList
);
563 return NULL
!= PrevInList
;
567 IntWindowFromDC(HDC hDc
)
571 for (Dce
= FirstDce
; Dce
!= NULL
; Dce
= Dce
->next
)
575 return Dce
->hwndCurrent
;
584 UserReleaseDC(PWINDOW_OBJECT Window
, HDC hDc
, BOOL EndPaint
)
591 DPRINT("%p %p\n", Window
, hDc
);
593 while (dce
&& (dce
->hDC
!= hDc
))
598 if (dce
&& (dce
->DCXFlags
& DCX_DCEBUSY
))
600 nRet
= DceReleaseDC(dce
, EndPaint
);
609 NtUserReleaseDC(HWND hWnd
, HDC hDc
)
613 DPRINT("Enter NtUserReleaseDC\n");
614 UserEnterExclusive();
616 RETURN(UserReleaseDC(NULL
, hDc
, FALSE
));
619 DPRINT("Leave NtUserReleaseDC, ret=%i\n",_ret_
);
624 /***********************************************************************
628 DceFreeDCE(PDCE dce
, BOOLEAN Force
)
641 SetDCHook(dce
->hDC
, NULL
, 0L);
644 if(Force
&& !GDIOBJ_OwnedByCurrentProcess(dce
->hDC
))
646 GDIOBJ_SetOwnership(dce
->Self
, PsGetCurrentProcess());
647 DC_SetOwnership(dce
->hDC
, PsGetCurrentProcess());
650 NtGdiDeleteObjectApp(dce
->hDC
);
651 if (dce
->hClipRgn
&& ! (dce
->DCXFlags
& DCX_KEEPCLIPRGN
))
653 NtGdiDeleteObject(dce
->hClipRgn
);
656 DCEOBJ_FreeDCE(dce
->Self
);
662 /***********************************************************************
665 * Remove owned DCE and reset unreleased cache DCEs.
668 DceFreeWindowDCE(PWINDOW_OBJECT Window
)
675 if (pDCE
->hwndCurrent
== Window
->hSelf
)
677 if (pDCE
== Window
->Dce
) /* owned or Class DCE*/
679 if (Window
->Class
->style
& CS_OWNDC
) /* owned DCE*/
681 pDCE
= DceFreeDCE(pDCE
, FALSE
);
685 else if (pDCE
->DCXFlags
& (DCX_INTERSECTRGN
| DCX_EXCLUDERGN
)) /* Class DCE*/
687 DceDeleteClipRgn(pDCE
);
688 pDCE
->hwndCurrent
= 0;
693 if (pDCE
->DCXFlags
& DCX_DCEBUSY
) /* shared cache DCE */
695 /* FIXME: AFAICS we are doing the right thing here so
696 * this should be a DPRINT. But this is best left as an ERR
697 * because the 'application error' is likely to come from
698 * another part of Wine (i.e. it's our fault after all).
699 * We should change this to DPRINT when ReactOS is more stable
702 DPRINT1("[%p] GetDC() without ReleaseDC()!\n", Window
->hSelf
);
703 DceReleaseDC(pDCE
, FALSE
);
706 pDCE
->DCXFlags
&= DCX_CACHE
;
707 pDCE
->DCXFlags
|= DCX_DCEEMPTY
;
708 pDCE
->hwndCurrent
= 0;
718 while (FirstDce
!= NULL
)
720 FirstDce
= DceFreeDCE(FirstDce
, TRUE
);
725 DceResetActiveDCEs(PWINDOW_OBJECT Window
)
729 PWINDOW_OBJECT CurrentWindow
;
741 if (0 == (pDCE
->DCXFlags
& DCX_DCEEMPTY
))
743 if (Window
->hSelf
== pDCE
->hwndCurrent
)
745 CurrentWindow
= Window
;
749 CurrentWindow
= UserGetWindowObject(pDCE
->hwndCurrent
);
750 if (NULL
== CurrentWindow
)
757 dc
= DC_LockDc(pDCE
->hDC
);
760 // if (Window->hSelf != pDCE->hwndCurrent)
762 // UserDerefObject(CurrentWindow);
767 if (Window
== CurrentWindow
|| IntIsChildWindow(Window
, CurrentWindow
))
769 if (pDCE
->DCXFlags
& DCX_WINDOW
)
771 DeltaX
= CurrentWindow
->WindowRect
.left
- dc
->w
.DCOrgX
;
772 DeltaY
= CurrentWindow
->WindowRect
.top
- dc
->w
.DCOrgY
;
773 dc
->w
.DCOrgX
= CurrentWindow
->WindowRect
.left
;
774 dc
->w
.DCOrgY
= CurrentWindow
->WindowRect
.top
;
778 DeltaX
= CurrentWindow
->ClientRect
.left
- dc
->w
.DCOrgX
;
779 DeltaY
= CurrentWindow
->ClientRect
.top
- dc
->w
.DCOrgY
;
780 dc
->w
.DCOrgX
= CurrentWindow
->ClientRect
.left
;
781 dc
->w
.DCOrgY
= CurrentWindow
->ClientRect
.top
;
783 if (NULL
!= dc
->w
.hClipRgn
)
785 int FASTCALL
CLIPPING_UpdateGCRegion(DC
* Dc
);
786 NtGdiOffsetRgn(dc
->w
.hClipRgn
, DeltaX
, DeltaY
);
787 CLIPPING_UpdateGCRegion(dc
);
789 if (NULL
!= pDCE
->hClipRgn
)
791 NtGdiOffsetRgn(pDCE
->hClipRgn
, DeltaX
, DeltaY
);
796 DceUpdateVisRgn(pDCE
, CurrentWindow
, pDCE
->DCXFlags
);
798 if (Window
->hSelf
!= pDCE
->hwndCurrent
)
800 // IntEngWindowChanged(CurrentWindow, WOC_RGN_CLIENT);
801 // UserDerefObject(CurrentWindow);
811 #define COPY_DEVMODE_VALUE_TO_CALLER(dst, src, member) \
812 Status = MmCopyToCaller(&(dst)->member, &(src)->member, sizeof ((src)->member)); \
813 if (!NT_SUCCESS(Status)) \
815 SetLastNtError(Status); \
822 NtUserEnumDisplaySettings(
823 PUNICODE_STRING lpszDeviceName
,
825 LPDEVMODEW lpDevMode
, /* FIXME is this correct? */
829 LPDEVMODEW pSafeDevMode
;
830 PUNICODE_STRING pSafeDeviceName
= NULL
;
831 UNICODE_STRING SafeDeviceName
;
832 USHORT Size
= 0, ExtraSize
= 0;
834 /* Copy the devmode */
835 Status
= MmCopyFromCaller(&Size
, &lpDevMode
->dmSize
, sizeof (Size
));
836 if (!NT_SUCCESS(Status
))
838 SetLastNtError(Status
);
841 Status
= MmCopyFromCaller(&ExtraSize
, &lpDevMode
->dmDriverExtra
, sizeof (ExtraSize
));
842 if (!NT_SUCCESS(Status
))
844 SetLastNtError(Status
);
847 pSafeDevMode
= ExAllocatePool(PagedPool
, Size
+ ExtraSize
);
848 if (pSafeDevMode
== NULL
)
850 SetLastWin32Error(ERROR_NOT_ENOUGH_MEMORY
);
853 pSafeDevMode
->dmSize
= Size
;
854 pSafeDevMode
->dmDriverExtra
= ExtraSize
;
856 /* Copy the device name */
857 if (lpszDeviceName
!= NULL
)
859 Status
= IntSafeCopyUnicodeString(&SafeDeviceName
, lpszDeviceName
);
860 if (!NT_SUCCESS(Status
))
862 ExFreePool(pSafeDevMode
);
863 SetLastNtError(Status
);
866 pSafeDeviceName
= &SafeDeviceName
;
869 /* Call internal function */
870 if (!IntEnumDisplaySettings(pSafeDeviceName
, iModeNum
, pSafeDevMode
, dwFlags
))
872 if (pSafeDeviceName
!= NULL
)
873 RtlFreeUnicodeString(pSafeDeviceName
);
874 ExFreePool(pSafeDevMode
);
877 if (pSafeDeviceName
!= NULL
)
878 RtlFreeUnicodeString(pSafeDeviceName
);
880 /* Copy some information back */
881 COPY_DEVMODE_VALUE_TO_CALLER(lpDevMode
, pSafeDevMode
, dmPelsWidth
);
882 COPY_DEVMODE_VALUE_TO_CALLER(lpDevMode
, pSafeDevMode
, dmPelsHeight
);
883 COPY_DEVMODE_VALUE_TO_CALLER(lpDevMode
, pSafeDevMode
, dmBitsPerPel
);
884 COPY_DEVMODE_VALUE_TO_CALLER(lpDevMode
, pSafeDevMode
, dmDisplayFrequency
);
885 COPY_DEVMODE_VALUE_TO_CALLER(lpDevMode
, pSafeDevMode
, dmDisplayFlags
);
887 /* output private/extra driver data */
890 Status
= MmCopyToCaller((PCHAR
)lpDevMode
+ Size
, (PCHAR
)pSafeDevMode
+ Size
, ExtraSize
);
891 if (!NT_SUCCESS(Status
))
893 SetLastNtError(Status
);
894 ExFreePool(pSafeDevMode
);
899 ExFreePool(pSafeDevMode
);
903 #undef COPY_DEVMODE_VALUE_TO_CALLER
908 NtUserChangeDisplaySettings(
909 PUNICODE_STRING lpszDeviceName
,
910 LPDEVMODEW lpDevMode
,
917 PUNICODE_STRING pSafeDeviceName
= NULL
;
918 UNICODE_STRING SafeDeviceName
;
921 /* Check arguments */
922 #ifdef CDS_VIDEOPARAMETERS
924 if (dwflags
!= CDS_VIDEOPARAMETERS
&& lParam
!= NULL
)
931 SetLastWin32Error(ERROR_INVALID_PARAMETER
);
932 return DISP_CHANGE_BADPARAM
;
936 SetLastWin32Error(ERROR_INVALID_PARAMETER
);
937 return DISP_CHANGE_BADPARAM
;
941 Status
= MmCopyFromCaller(&DevMode
.dmSize
, &lpDevMode
->dmSize
, sizeof (DevMode
.dmSize
));
942 if (!NT_SUCCESS(Status
))
944 SetLastNtError(Status
);
945 return DISP_CHANGE_BADPARAM
;
947 DevMode
.dmSize
= min(sizeof (DevMode
), DevMode
.dmSize
);
948 Status
= MmCopyFromCaller(&DevMode
, lpDevMode
, DevMode
.dmSize
);
949 if (!NT_SUCCESS(Status
))
951 SetLastNtError(Status
);
952 return DISP_CHANGE_BADPARAM
;
954 if (DevMode
.dmDriverExtra
> 0)
956 DbgPrint("(%s:%i) WIN32K: %s lpDevMode->dmDriverExtra is IGNORED!\n", __FILE__
, __LINE__
, __FUNCTION__
);
957 DevMode
.dmDriverExtra
= 0;
960 /* Copy the device name */
961 if (lpszDeviceName
!= NULL
)
963 Status
= IntSafeCopyUnicodeString(&SafeDeviceName
, lpszDeviceName
);
964 if (!NT_SUCCESS(Status
))
966 SetLastNtError(Status
);
967 return DISP_CHANGE_BADPARAM
;
969 pSafeDeviceName
= &SafeDeviceName
;
972 /* Call internal function */
973 Ret
= IntChangeDisplaySettings(pSafeDeviceName
, &DevMode
, dwflags
, lParam
);
975 if (pSafeDeviceName
!= NULL
)
976 RtlFreeUnicodeString(pSafeDeviceName
);