reactos/subsystems/win32/win32k/ntuser/painting.c

   1 /*
   2  *  COPYRIGHT:        See COPYING in the top level directory
   3  *  PROJECT:          ReactOS kernel
   4  *  PURPOSE:          Window painting function
   5  *  FILE:             subsys/win32k/ntuser/painting.c
   6  *  PROGRAMER:        Filip Navara (xnavara@volny.cz)
   7  *  REVISION HISTORY:
   8  *       06/06/2001   Created (?)
   9  *       18/11/2003   Complete rewrite
  10  */
  11
  12 /* INCLUDES ******************************************************************/
  13
  14 #include <win32k.h>
  15
  16 #define NDEBUG
  17 #include <debug.h>
  18
  19 /* PRIVATE FUNCTIONS **********************************************************/
  20
  21 /**
  22  * @name IntIntersectWithParents
  23  *
  24  * Intersect window rectangle with all parent client rectangles.
  25  *
  26  * @param Child
  27  *        Pointer to child window to start intersecting from.
  28  * @param WindowRect
  29  *        Pointer to rectangle that we want to intersect in screen
  30  *        coordinates on input and intersected rectangle on output (if TRUE
  31  *        is returned).
  32  *
  33  * @return
  34  *    If any parent is minimized or invisible or the resulting rectangle
  35  *    is empty then FALSE is returned. Otherwise TRUE is returned.
  36  */
  37
  38 BOOL FASTCALL
  39 IntIntersectWithParents(PWND Child, RECTL *WindowRect)
  40 {
  41    PWND ParentWnd;
  42
  43    ParentWnd = Child->spwndParent;
  44    while (ParentWnd != NULL)
  45    {
  46       if (!(ParentWnd->style & WS_VISIBLE) ||
  47           (ParentWnd->style & WS_MINIMIZE))
  48       {
  49          return FALSE;
  50       }
  51
  52       if (!RECTL_bIntersectRect(WindowRect, WindowRect, &ParentWnd->rcClient))
  53       {
  54          return FALSE;
  55       }
  56
  57       /* FIXME: Layered windows. */
  58
  59       ParentWnd = ParentWnd->spwndParent;
  60    }
  61
  62    return TRUE;
  63 }
  64
  65 BOOL FASTCALL
  66 IntValidateParent(PWND Child, HRGN hValidateRgn, BOOL Recurse)
  67 {
  68    PWND ParentWnd = Child->spwndParent;
  69
  70    while (ParentWnd)
  71    {
  72       if (ParentWnd->style & WS_CLIPCHILDREN)
  73          break;
  74
  75       if (ParentWnd->hrgnUpdate != 0)
  76       {
  77          if (Recurse)
  78             return FALSE;
  79
  80          IntInvalidateWindows( ParentWnd,
  81                                hValidateRgn,
  82                                RDW_VALIDATE | RDW_NOCHILDREN);
  83       }
  84
  85       ParentWnd = ParentWnd->spwndParent;
  86    }
  87
  88    return TRUE;
  89 }
  90
  91 /**
  92  * @name IntCalcWindowRgn
  93  *
  94  * Get a window or client region.
  95  */
  96
  97 HRGN FASTCALL
  98 IntCalcWindowRgn(PWND Wnd, BOOL Client)
  99 {
 100    HRGN hRgnWindow;
 101
 102    if (Client)
 103       hRgnWindow = IntSysCreateRectRgnIndirect(&Wnd->rcClient);
 104    else
 105       hRgnWindow = IntSysCreateRectRgnIndirect(&Wnd->rcWindow);
 106
 107    if (Wnd->hrgnClip != NULL && !(Wnd->style & WS_MINIMIZE))
 108    {
 109       NtGdiOffsetRgn(hRgnWindow,
 110          -Wnd->rcWindow.left,
 111          -Wnd->rcWindow.top);
 112       NtGdiCombineRgn(hRgnWindow, hRgnWindow, Wnd->hrgnClip, RGN_AND);
 113       NtGdiOffsetRgn(hRgnWindow,
 114          Wnd->rcWindow.left,
 115          Wnd->rcWindow.top);
 116    }
 117
 118    return hRgnWindow;
 119 }
 120
 121 /**
 122  * @name IntGetNCUpdateRgn
 123  *
 124  * Get non-client update region of a window and optionally validate it.
 125  *
 126  * @param Window
 127  *        Pointer to window to get the NC update region from.
 128  * @param Validate
 129  *        Set to TRUE to force validating the NC update region.
 130  *
 131  * @return
 132  *    Handle to NC update region. The caller is responsible for deleting
 133  *    it.
 134  */
 135
 136 HRGN FASTCALL
 137 IntGetNCUpdateRgn(PWND Window, BOOL Validate)
 138 {
 139    HRGN hRgnNonClient;
 140    HRGN hRgnWindow;
 141    UINT RgnType;
 142
 143    if (Window->hrgnUpdate != NULL &&
 144        Window->hrgnUpdate != (HRGN)1)
 145    {
 146       hRgnNonClient = IntCalcWindowRgn(Window, FALSE);
 147
 148       /*
 149        * If region creation fails it's safe to fallback to whole
 150        * window region.
 151        */
 152       if (hRgnNonClient == NULL)
 153       {
 154          return (HRGN)1;
 155       }
 156
 157       hRgnWindow = IntCalcWindowRgn(Window, TRUE);
 158       if (hRgnWindow == NULL)
 159       {
 160          REGION_FreeRgnByHandle(hRgnNonClient);
 161          return (HRGN)1;
 162       }
 163
 164       RgnType = NtGdiCombineRgn(hRgnNonClient, hRgnNonClient,
 165                                 hRgnWindow, RGN_DIFF);
 166       if (RgnType == ERROR)
 167       {
 168          REGION_FreeRgnByHandle(hRgnWindow);
 169          REGION_FreeRgnByHandle(hRgnNonClient);
 170          return (HRGN)1;
 171       }
 172       else if (RgnType == NULLREGION)
 173       {
 174          REGION_FreeRgnByHandle(hRgnWindow);
 175          REGION_FreeRgnByHandle(hRgnNonClient);
 176          return NULL;
 177       }
 178
 179       /*
 180        * Remove the nonclient region from the standard update region if
 181        * we were asked for it.
 182        */
 183
 184       if (Validate)
 185       {
 186          if (NtGdiCombineRgn(Window->hrgnUpdate, Window->hrgnUpdate,
 187                              hRgnWindow, RGN_AND) == NULLREGION)
 188          {
 189             IntGdiSetRegionOwner(Window->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
 190             REGION_FreeRgnByHandle(Window->hrgnUpdate);
 191             Window->hrgnUpdate = NULL;
 192             if (!(Window->state & WNDS_INTERNALPAINT))
 193                MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 194          }
 195       }
 196
 197       REGION_FreeRgnByHandle(hRgnWindow);
 198
 199       return hRgnNonClient;
 200    }
 201    else
 202    {
 203       return Window->hrgnUpdate;
 204    }
 205 }
 206
 207 /*
 208  * IntPaintWindows
 209  *
 210  * Internal function used by IntRedrawWindow.
 211  */
 212
 213 VOID FASTCALL
 214 co_IntPaintWindows(PWND Wnd, ULONG Flags, BOOL Recurse)
 215 {
 216    HDC hDC;
 217    HWND hWnd = Wnd->head.h;
 218    HRGN TempRegion;
 219
 220    if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
 221    {
 222       if (Wnd->hrgnUpdate)
 223       {
 224          if (!IntValidateParent(Wnd, Wnd->hrgnUpdate, Recurse))
 225             return;
 226       }
 227
 228       if (Flags & RDW_UPDATENOW)
 229       {
 230          if (Wnd->hrgnUpdate != NULL ||
 231              Wnd->state & WNDS_INTERNALPAINT)
 232          {
 233             co_IntSendMessage(hWnd, WM_PAINT, 0, 0);
 234          }
 235       }
 236       else
 237       {
 238          if (Wnd->state & WNDS_SENDNCPAINT)
 239          {
 240             TempRegion = IntGetNCUpdateRgn(Wnd, TRUE);
 241             Wnd->state &= ~WNDS_SENDNCPAINT;
 242             MsqDecPaintCountQueue(Wnd->head.pti->MessageQueue);
 243             co_IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)TempRegion, 0);
 244
 245             if ( (HANDLE) 1 != TempRegion &&
 246                  NULL != TempRegion)
 247             {
 248                /* NOTE: The region can already be deleted! */
 249                GDIOBJ_FreeObjByHandle(TempRegion, GDI_OBJECT_TYPE_REGION | GDI_OBJECT_TYPE_SILENT);
 250             }
 251          }
 252
 253          if (Wnd->state & WNDS_ERASEBACKGROUND)
 254          {
 255             if (Wnd->hrgnUpdate)
 256             {
 257                hDC = UserGetDCEx( Wnd,
 258                                   Wnd->hrgnUpdate,
 259                                   DCX_CACHE|DCX_USESTYLE|DCX_INTERSECTRGN|DCX_KEEPCLIPRGN);
 260
 261                if (co_IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)hDC, 0))
 262                {
 263                   Wnd->state &= ~WNDS_ERASEBACKGROUND;
 264                }
 265                UserReleaseDC(Wnd, hDC, FALSE);
 266             }
 267          }
 268       }
 269    }
 270
 271    /*
 272     * Check that the window is still valid at this point
 273     */
 274    if (!IntIsWindow(hWnd))
 275    {
 276       return;
 277    }
 278
 279    /*
 280     * Paint child windows.
 281     */
 282    if (!(Flags & RDW_NOCHILDREN) &&
 283        !(Wnd->style & WS_MINIMIZE) &&
 284         ((Flags & RDW_ALLCHILDREN) || !(Wnd->style & WS_CLIPCHILDREN)) )
 285    {
 286       HWND *List, *phWnd;
 287
 288       if ((List = IntWinListChildren(Wnd)))
 289       {
 290          /* FIXME: Handle WS_EX_TRANSPARENT */
 291          for (phWnd = List; *phWnd; ++phWnd)
 292          {
 293             Wnd = UserGetWindowObject(*phWnd);
 294             if (Wnd && (Wnd->style & WS_VISIBLE))
 295             {
 296                USER_REFERENCE_ENTRY Ref;
 297                UserRefObjectCo(Wnd, &Ref);
 298                co_IntPaintWindows(Wnd, Flags, TRUE);
 299                UserDerefObjectCo(Wnd);
 300             }
 301          }
 302          ExFreePool(List);
 303       }
 304    }
 305 }
 306
 307 /*
 308  * IntInvalidateWindows
 309  *
 310  * Internal function used by IntRedrawWindow.
 311  */
 312
 313 VOID FASTCALL
 314 IntInvalidateWindows(PWND Wnd, HRGN hRgn, ULONG Flags)
 315 {
 316    INT RgnType;
 317    BOOL HadPaintMessage, HadNCPaintMessage;
 318    BOOL HasPaintMessage, HasNCPaintMessage;
 319
 320    DPRINT("IntInvalidateWindows start\n");
 321    /*
 322     * If the nonclient is not to be redrawn, clip the region to the client
 323     * rect
 324     */
 325    if (0 != (Flags & RDW_INVALIDATE) && 0 == (Flags & RDW_FRAME))
 326    {
 327       HRGN hRgnClient;
 328
 329       hRgnClient = IntSysCreateRectRgnIndirect(&Wnd->rcClient);
 330       RgnType = NtGdiCombineRgn(hRgn, hRgn, hRgnClient, RGN_AND);
 331       REGION_FreeRgnByHandle(hRgnClient);
 332    }
 333
 334    /*
 335     * Clip the given region with window rectangle (or region)
 336     */
 337
 338    if (!Wnd->hrgnClip || (Wnd->style & WS_MINIMIZE))
 339    {
 340       HRGN hRgnWindow;
 341
 342       hRgnWindow = IntSysCreateRectRgnIndirect(&Wnd->rcWindow);
 343       RgnType = NtGdiCombineRgn(hRgn, hRgn, hRgnWindow, RGN_AND);
 344       REGION_FreeRgnByHandle(hRgnWindow);
 345    }
 346    else
 347    {
 348       NtGdiOffsetRgn( hRgn,
 349                      -Wnd->rcWindow.left,
 350                      -Wnd->rcWindow.top);
 351       RgnType = NtGdiCombineRgn(hRgn, hRgn, Wnd->hrgnClip, RGN_AND);
 352       NtGdiOffsetRgn( hRgn,
 353                       Wnd->rcWindow.left,
 354                       Wnd->rcWindow.top);
 355    }
 356
 357    /*
 358     * Save current state of pending updates
 359     */
 360
 361    HadPaintMessage = Wnd->hrgnUpdate != NULL ||
 362                      Wnd->state & WNDS_INTERNALPAINT;
 363    HadNCPaintMessage = Wnd->state & WNDS_SENDNCPAINT;
 364
 365    /*
 366     * Update the region and flags
 367     */
 368
 369    if (Flags & RDW_INVALIDATE && RgnType != NULLREGION)
 370    {
 371       if (Wnd->hrgnUpdate == NULL)
 372       {
 373          Wnd->hrgnUpdate = IntSysCreateRectRgn(0, 0, 0, 0);
 374          IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_PUBLIC);
 375       }
 376
 377       if (NtGdiCombineRgn(Wnd->hrgnUpdate, Wnd->hrgnUpdate,
 378                           hRgn, RGN_OR) == NULLREGION)
 379       {
 380          IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
 381          REGION_FreeRgnByHandle(Wnd->hrgnUpdate);
 382          Wnd->hrgnUpdate = NULL;
 383       }
 384
 385       if (Flags & RDW_FRAME)
 386          Wnd->state |= WNDS_SENDNCPAINT;
 387       if (Flags & RDW_ERASE)
 388          Wnd->state |= WNDS_ERASEBACKGROUND;
 389
 390       Flags |= RDW_FRAME;
 391    }
 392
 393    if (Flags & RDW_VALIDATE && RgnType != NULLREGION)
 394    {
 395       if (Wnd->hrgnUpdate != NULL)
 396       {
 397          if (NtGdiCombineRgn(Wnd->hrgnUpdate, Wnd->hrgnUpdate,
 398                              hRgn, RGN_DIFF) == NULLREGION)
 399          {
 400             IntGdiSetRegionOwner(Wnd->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
 401             REGION_FreeRgnByHandle(Wnd->hrgnUpdate);
 402             Wnd->hrgnUpdate = NULL;
 403          }
 404       }
 405
 406       if (Wnd->hrgnUpdate == NULL)
 407          Wnd->state &= ~WNDS_ERASEBACKGROUND;
 408       if (Flags & RDW_NOFRAME)
 409          Wnd->state &= ~WNDS_SENDNCPAINT;
 410       if (Flags & RDW_NOERASE)
 411          Wnd->state &= ~WNDS_ERASEBACKGROUND;
 412    }
 413
 414    if (Flags & RDW_INTERNALPAINT)
 415    {
 416       Wnd->state |= WNDS_INTERNALPAINT;
 417    }
 418
 419    if (Flags & RDW_NOINTERNALPAINT)
 420    {
 421       Wnd->state &= ~WNDS_INTERNALPAINT;
 422    }
 423
 424    /*
 425     * Process children if needed
 426     */
 427
 428    if (!(Flags & RDW_NOCHILDREN) && !(Wnd->style & WS_MINIMIZE) &&
 429          ((Flags & RDW_ALLCHILDREN) || !(Wnd->style & WS_CLIPCHILDREN)))
 430    {
 431       PWND Child;
 432
 433       for (Child = Wnd->spwndChild; Child; Child = Child->spwndNext)
 434       {
 435          if (Child->style & WS_VISIBLE)
 436          {
 437             /*
 438              * Recursive call to update children hrgnUpdate
 439              */
 440             HRGN hRgnTemp = IntSysCreateRectRgn(0, 0, 0, 0);
 441             NtGdiCombineRgn(hRgnTemp, hRgn, 0, RGN_COPY);
 442             IntInvalidateWindows(Child, hRgnTemp, Flags);
 443             REGION_FreeRgnByHandle(hRgnTemp);
 444          }
 445
 446       }
 447    }
 448
 449    /*
 450     * Fake post paint messages to window message queue if needed
 451     */
 452
 453    HasPaintMessage = Wnd->hrgnUpdate != NULL ||
 454                      Wnd->state & WNDS_INTERNALPAINT;
 455    HasNCPaintMessage = Wnd->state & WNDS_SENDNCPAINT;
 456
 457    if (HasPaintMessage != HadPaintMessage)
 458    {
 459       if (HadPaintMessage)
 460          MsqDecPaintCountQueue(Wnd->head.pti->MessageQueue);
 461       else
 462          MsqIncPaintCountQueue(Wnd->head.pti->MessageQueue);
 463    }
 464
 465    if (HasNCPaintMessage != HadNCPaintMessage)
 466    {
 467       if (HadNCPaintMessage)
 468          MsqDecPaintCountQueue(Wnd->head.pti->MessageQueue);
 469       else
 470          MsqIncPaintCountQueue(Wnd->head.pti->MessageQueue);
 471    }
 472    DPRINT("IntInvalidateWindows exit\n");
 473 }
 474
 475 /*
 476  * IntIsWindowDrawable
 477  *
 478  * Remarks
 479  *    Window is drawable when it is visible and all parents are not
 480  *    minimized.
 481  */
 482
 483 BOOL FASTCALL
 484 IntIsWindowDrawable(PWND Wnd)
 485 {
 486    PWND WndObject;
 487
 488    for (WndObject = Wnd; WndObject != NULL; WndObject = WndObject->spwndParent)
 489    {
 490       if ( WndObject->state2 & WNDS2_INDESTROY ||
 491            WndObject->state & WNDS_DESTROYED ||
 492            !WndObject ||
 493            !(WndObject->style & WS_VISIBLE) ||
 494             ((WndObject->style & WS_MINIMIZE) && (WndObject != Wnd)))
 495       {
 496          return FALSE;
 497       }
 498    }
 499
 500    return TRUE;
 501 }
 502
 503 /*
 504  * IntRedrawWindow
 505  *
 506  * Internal version of NtUserRedrawWindow that takes WND as
 507  * first parameter.
 508  */
 509
 510 BOOL FASTCALL
 511 co_UserRedrawWindow(
 512    PWND Window,
 513    const RECTL* UpdateRect,
 514    HRGN UpdateRgn,
 515    ULONG Flags)
 516 {
 517    HRGN hRgn = NULL;
 518    DPRINT("co_UserRedrawWindow start\n");
 519
 520    /*
 521     * Step 1.
 522     * Validation of passed parameters.
 523     */
 524
 525    if (!IntIsWindowDrawable(Window))
 526    {
 527       return TRUE; // Just do nothing!!!
 528    }
 529
 530    /*
 531     * Step 2.
 532     * Transform the parameters UpdateRgn and UpdateRect into
 533     * a region hRgn specified in screen coordinates.
 534     */
 535
 536    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE)) // Both are OKAY!
 537    {
 538       if (UpdateRgn != NULL)
 539       {
 540          hRgn = IntSysCreateRectRgn(0, 0, 0, 0);
 541          if (NtGdiCombineRgn(hRgn, UpdateRgn, NULL, RGN_COPY) == NULLREGION)
 542          {
 543             REGION_FreeRgnByHandle(hRgn);
 544             hRgn = NULL;
 545          }
 546          else
 547             NtGdiOffsetRgn(hRgn, Window->rcClient.left, Window->rcClient.top);
 548       }
 549       else if (UpdateRect != NULL)
 550       {
 551          if (!RECTL_bIsEmptyRect(UpdateRect))
 552          {
 553             hRgn = IntSysCreateRectRgnIndirect((RECTL *)UpdateRect);
 554             NtGdiOffsetRgn(hRgn, Window->rcClient.left, Window->rcClient.top);
 555          }
 556       }
 557       else if ((Flags & (RDW_INVALIDATE | RDW_FRAME)) == (RDW_INVALIDATE | RDW_FRAME) ||
 558                (Flags & (RDW_VALIDATE | RDW_NOFRAME)) == (RDW_VALIDATE | RDW_NOFRAME))
 559       {
 560          if (!RECTL_bIsEmptyRect(&Window->rcWindow))
 561             hRgn = IntSysCreateRectRgnIndirect(&Window->rcWindow);
 562       }
 563       else
 564       {
 565          if (!RECTL_bIsEmptyRect(&Window->rcClient))
 566             hRgn = IntSysCreateRectRgnIndirect(&Window->rcClient);
 567       }
 568    }
 569
 570    /*
 571     * Step 3.
 572     * Adjust the window update region depending on hRgn and flags.
 573     */
 574
 575    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT) &&
 576        hRgn != NULL)
 577    {
 578       IntInvalidateWindows(Window, hRgn, Flags);
 579    }
 580
 581    /*
 582     * Step 4.
 583     * Repaint and erase windows if needed.
 584     */
 585
 586    if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
 587    {
 588       co_IntPaintWindows(Window, Flags, FALSE);
 589    }
 590
 591    /*
 592     * Step 5.
 593     * Cleanup ;-)
 594     */
 595
 596    if (hRgn != NULL)
 597    {
 598       REGION_FreeRgnByHandle(hRgn);
 599    }
 600    DPRINT("co_UserRedrawWindow exit\n");
 601
 602    return TRUE;
 603 }
 604
 605 BOOL FASTCALL
 606 IntIsWindowDirty(PWND Wnd)
 607 {
 608    return (Wnd->style & WS_VISIBLE) &&
 609           ((Wnd->hrgnUpdate != NULL) ||
 610            (Wnd->state & WNDS_INTERNALPAINT) ||
 611            (Wnd->state & WNDS_SENDNCPAINT));
 612 }
 613
 614 HWND FASTCALL
 615 IntFindWindowToRepaint(PWND Window, PTHREADINFO Thread)
 616 {
 617    HWND hChild;
 618    PWND TempWindow;
 619
 620    for (; Window != NULL; Window = Window->spwndNext)
 621    {
 622       if (IntWndBelongsToThread(Window, Thread) &&
 623           IntIsWindowDirty(Window))
 624       {
 625          /* Make sure all non-transparent siblings are already drawn. */
 626          if (Window->ExStyle & WS_EX_TRANSPARENT)
 627          {
 628             for (TempWindow = Window->spwndNext; TempWindow != NULL;
 629                  TempWindow = TempWindow->spwndNext)
 630             {
 631                if (!(TempWindow->ExStyle & WS_EX_TRANSPARENT) &&
 632                    IntWndBelongsToThread(TempWindow, Thread) &&
 633                    IntIsWindowDirty(TempWindow))
 634                {
 635                   return TempWindow->head.h;
 636                }
 637             }
 638          }
 639
 640          return Window->head.h;
 641       }
 642
 643       if (Window->spwndChild)
 644       {
 645          hChild = IntFindWindowToRepaint(Window->spwndChild, Thread);
 646          if (hChild != NULL)
 647             return hChild;
 648       }
 649    }
 650
 651    return NULL;
 652 }
 653
 654 BOOL FASTCALL
 655 IntGetPaintMessage(
 656    PWND Window,
 657    UINT MsgFilterMin,
 658    UINT MsgFilterMax,
 659    PTHREADINFO Thread,
 660    MSG *Message,
 661    BOOL Remove)
 662 {
 663    PUSER_MESSAGE_QUEUE MessageQueue = (PUSER_MESSAGE_QUEUE)Thread->MessageQueue;
 664
 665    if (!MessageQueue->PaintCount)
 666       return FALSE;
 667
 668    if ((MsgFilterMin != 0 || MsgFilterMax != 0) &&
 669          (MsgFilterMin > WM_PAINT || MsgFilterMax < WM_PAINT))
 670       return FALSE;
 671
 672    Message->hwnd = IntFindWindowToRepaint(UserGetDesktopWindow(), PsGetCurrentThreadWin32Thread());
 673
 674    if (Message->hwnd == NULL)
 675    {
 676       DPRINT1("PAINTING BUG: Thread marked as containing dirty windows, but no dirty windows found!\n");
 677       /* Hack to stop spamming the debuglog ! */
 678       MessageQueue->PaintCount = 0;
 679       return FALSE;
 680    }
 681
 682    if (Window != NULL && Message->hwnd != Window->head.h)
 683       return FALSE;
 684
 685    Message->message = WM_PAINT;
 686    Message->wParam = Message->lParam = 0;
 687
 688    return TRUE;
 689 }
 690
 691 static
 692 HWND FASTCALL
 693 co_IntFixCaret(PWND Window, RECTL *lprc, UINT flags)
 694 {
 695    PDESKTOP Desktop;
 696    PTHRDCARETINFO CaretInfo;
 697    HWND hWndCaret;
 698    PWND WndCaret;
 699
 700    ASSERT_REFS_CO(Window);
 701
 702    Desktop = ((PTHREADINFO)PsGetCurrentThread()->Tcb.Win32Thread)->rpdesk;
 703    CaretInfo = ((PUSER_MESSAGE_QUEUE)Desktop->ActiveMessageQueue)->CaretInfo;
 704    hWndCaret = CaretInfo->hWnd;
 705
 706    WndCaret = UserGetWindowObject(hWndCaret);
 707
 708    //fix: check for WndCaret can be null
 709    if (WndCaret == Window ||
 710          ((flags & SW_SCROLLCHILDREN) && IntIsChildWindow(Window, WndCaret)))
 711    {
 712       POINT pt, FromOffset, ToOffset;
 713       RECTL rcCaret;
 714
 715       pt.x = CaretInfo->Pos.x;
 716       pt.y = CaretInfo->Pos.y;
 717       IntGetClientOrigin(WndCaret, &FromOffset);
 718       IntGetClientOrigin(Window, &ToOffset);
 719       rcCaret.left = pt.x;
 720       rcCaret.top = pt.y;
 721       rcCaret.right = pt.x + CaretInfo->Size.cx;
 722       rcCaret.bottom = pt.y + CaretInfo->Size.cy;
 723       if (RECTL_bIntersectRect(lprc, lprc, &rcCaret))
 724       {
 725          co_UserHideCaret(0);
 726          lprc->left = pt.x;
 727          lprc->top = pt.y;
 728          return hWndCaret;
 729       }
 730    }
 731
 732    return 0;
 733 }
 734
 735 BOOL
 736 FASTCALL
 737 IntPrintWindow(
 738     PWND pwnd,
 739     HDC hdcBlt,
 740     UINT nFlags)
 741 {
 742     HDC hdcSrc;
 743     INT cx, cy, xSrc, ySrc;
 744
 745     if ( nFlags & PW_CLIENTONLY)
 746     {
 747        cx = pwnd->rcClient.right - pwnd->rcClient.left;
 748        cy = pwnd->rcClient.bottom - pwnd->rcClient.top;
 749        xSrc = pwnd->rcClient.left - pwnd->rcWindow.left;
 750        ySrc = pwnd->rcClient.top - pwnd->rcWindow.top;
 751     }
 752     else
 753     {
 754        cx = pwnd->rcWindow.right - pwnd->rcWindow.left;
 755        cy = pwnd->rcWindow.bottom - pwnd->rcWindow.top;
 756        xSrc = 0;
 757        ySrc = 0;
 758     }
 759
 760     // TODO: Setup Redirection for Print.
 761     return FALSE;
 762
 763     /* Update the window just incase. */
 764     co_IntPaintWindows( pwnd, RDW_ERASENOW|RDW_UPDATENOW, FALSE);
 765
 766     hdcSrc = UserGetDCEx( pwnd, NULL, DCX_CACHE|DCX_WINDOW);
 767     /* Print window to printer context. */
 768     NtGdiBitBlt( hdcBlt,
 769                  0,
 770                  0,
 771                  cx,
 772                  cy,
 773                  hdcSrc,
 774                  xSrc,
 775                  ySrc,
 776                  SRCCOPY,
 777                  0,
 778                  0);
 779
 780     UserReleaseDC( pwnd, hdcSrc, FALSE);
 781
 782     // TODO: Release Redirection from Print.
 783
 784     return TRUE;
 785 }
 786
 787 /* PUBLIC FUNCTIONS ***********************************************************/
 788
 789 /*
 790  * NtUserBeginPaint
 791  *
 792  * Status
 793  *    @implemented
 794  */
 795
 796 HDC APIENTRY
 797 NtUserBeginPaint(HWND hWnd, PAINTSTRUCT* UnsafePs)
 798 {
 799    PWND Window = NULL;
 800    PAINTSTRUCT Ps;
 801    NTSTATUS Status;
 802    DECLARE_RETURN(HDC);
 803    USER_REFERENCE_ENTRY Ref;
 804
 805    DPRINT("Enter NtUserBeginPaint\n");
 806    UserEnterExclusive();
 807
 808    if (!(Window = UserGetWindowObject(hWnd)))
 809    {
 810       RETURN( NULL);
 811    }
 812
 813    UserRefObjectCo(Window, &Ref);
 814
 815    co_UserHideCaret(Window);
 816
 817    if (Window->state & WNDS_SENDNCPAINT)
 818    {
 819       HRGN hRgn;
 820
 821       hRgn = IntGetNCUpdateRgn(Window, FALSE);
 822       Window->state &= ~WNDS_SENDNCPAINT;
 823       MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 824       co_IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)hRgn, 0);
 825       if (hRgn != (HANDLE)1 && hRgn != NULL)
 826       {
 827          /* NOTE: The region can already by deleted! */
 828          GDIOBJ_FreeObjByHandle(hRgn, GDI_OBJECT_TYPE_REGION | GDI_OBJECT_TYPE_SILENT);
 829       }
 830    }
 831
 832    RtlZeroMemory(&Ps, sizeof(PAINTSTRUCT));
 833
 834    Ps.hdc = UserGetDCEx( Window,
 835                          Window->hrgnUpdate,
 836                          DCX_INTERSECTRGN | DCX_USESTYLE);
 837    if (!Ps.hdc)
 838    {
 839       RETURN(NULL);
 840    }
 841
 842    if (Window->hrgnUpdate != NULL)
 843    {
 844       MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 845       GdiGetClipBox(Ps.hdc, &Ps.rcPaint);
 846       IntGdiSetRegionOwner(Window->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
 847       /* The region is part of the dc now and belongs to the process! */
 848       Window->hrgnUpdate = NULL;
 849    }
 850    else
 851    {
 852       if (Window->state & WNDS_INTERNALPAINT)
 853          MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 854
 855       IntGetClientRect(Window, &Ps.rcPaint);
 856    }
 857
 858    Window->state &= ~WNDS_INTERNALPAINT;
 859
 860    if (Window->state & WNDS_ERASEBACKGROUND)
 861    {
 862       Window->state &= ~WNDS_ERASEBACKGROUND;
 863       Ps.fErase = !co_IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)Ps.hdc, 0);
 864    }
 865    else
 866    {
 867       Ps.fErase = FALSE;
 868    }
 869    if (Window->hrgnUpdate)
 870    {
 871       if (!(Window->style & WS_CLIPCHILDREN))
 872       {
 873          PWND Child;
 874          for (Child = Window->spwndChild; Child; Child = Child->spwndNext)
 875          {
 876             IntInvalidateWindows(Child, Window->hrgnUpdate, RDW_FRAME | RDW_ERASE | RDW_INVALIDATE | RDW_ALLCHILDREN);
 877          }
 878       }
 879    }
 880
 881    Status = MmCopyToCaller(UnsafePs, &Ps, sizeof(PAINTSTRUCT));
 882    if (! NT_SUCCESS(Status))
 883    {
 884       SetLastNtError(Status);
 885       RETURN(NULL);
 886    }
 887
 888    RETURN(Ps.hdc);
 889
 890 CLEANUP:
 891    if (Window) UserDerefObjectCo(Window);
 892
 893    DPRINT("Leave NtUserBeginPaint, ret=%i\n",_ret_);
 894    UserLeave();
 895    END_CLEANUP;
 896
 897 }
 898
 899 /*
 900  * NtUserEndPaint
 901  *
 902  * Status
 903  *    @implemented
 904  */
 905
 906 BOOL APIENTRY
 907 NtUserEndPaint(HWND hWnd, CONST PAINTSTRUCT* pUnsafePs)
 908 {
 909    NTSTATUS Status = STATUS_SUCCESS;
 910    PWND Window;
 911    DECLARE_RETURN(BOOL);
 912    USER_REFERENCE_ENTRY Ref;
 913    HDC hdc = NULL;
 914
 915    DPRINT("Enter NtUserEndPaint\n");
 916    UserEnterExclusive();
 917
 918    if (!(Window = UserGetWindowObject(hWnd)))
 919    {
 920       RETURN(FALSE);
 921    }
 922
 923    _SEH2_TRY
 924    {
 925       ProbeForRead(pUnsafePs, sizeof(*pUnsafePs), 1);
 926       hdc = pUnsafePs->hdc;
 927    }
 928    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 929    {
 930       Status = _SEH2_GetExceptionCode();
 931    }
 932    _SEH2_END
 933    if (!NT_SUCCESS(Status))
 934    {
 935       RETURN(FALSE);
 936    }
 937
 938    UserReleaseDC(Window, hdc, TRUE);
 939
 940    UserRefObjectCo(Window, &Ref);
 941    co_UserShowCaret(Window);
 942    UserDerefObjectCo(Window);
 943
 944    RETURN(TRUE);
 945
 946 CLEANUP:
 947    DPRINT("Leave NtUserEndPaint, ret=%i\n",_ret_);
 948    UserLeave();
 949    END_CLEANUP;
 950 }
 951
 952
 953 INT FASTCALL
 954 co_UserGetUpdateRgn(PWND Window, HRGN hRgn, BOOL bErase)
 955 {
 956    int RegionType;
 957    RECTL Rect;
 958
 959    ASSERT_REFS_CO(Window);
 960
 961    if (Window->hrgnUpdate == NULL)
 962    {
 963       RegionType = (NtGdiSetRectRgn(hRgn, 0, 0, 0, 0) ? NULLREGION : ERROR);
 964    }
 965    else
 966    {
 967       Rect = Window->rcClient;
 968       IntIntersectWithParents(Window, &Rect);
 969       NtGdiSetRectRgn(hRgn, Rect.left, Rect.top, Rect.right, Rect.bottom);
 970       RegionType = NtGdiCombineRgn(hRgn, hRgn, Window->hrgnUpdate, RGN_AND);
 971       NtGdiOffsetRgn(hRgn, -Window->rcClient.left, -Window->rcClient.top);
 972    }
 973
 974    if (bErase && RegionType != NULLREGION && RegionType != ERROR)
 975    {
 976       co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
 977    }
 978
 979    return RegionType;
 980 }
 981
 982 /*
 983  * NtUserGetUpdateRgn
 984  *
 985  * Status
 986  *    @implemented
 987  */
 988
 989 INT APIENTRY
 990 NtUserGetUpdateRgn(HWND hWnd, HRGN hRgn, BOOL bErase)
 991 {
 992    DECLARE_RETURN(INT);
 993    PWND Window;
 994    INT ret;
 995    USER_REFERENCE_ENTRY Ref;
 996
 997    DPRINT("Enter NtUserGetUpdateRgn\n");
 998    UserEnterExclusive();
 999
1000    if (!(Window = UserGetWindowObject(hWnd)))
1001    {
1002       RETURN(ERROR);
1003    }
1004
1005    UserRefObjectCo(Window, &Ref);
1006    ret = co_UserGetUpdateRgn(Window, hRgn, bErase);
1007    UserDerefObjectCo(Window);
1008
1009    RETURN(ret);
1010
1011 CLEANUP:
1012    DPRINT("Leave NtUserGetUpdateRgn, ret=%i\n",_ret_);
1013    UserLeave();
1014    END_CLEANUP;
1015 }
1016
1017 /*
1018  * NtUserGetUpdateRect
1019  *
1020  * Status
1021  *    @implemented
1022  */
1023
1024 BOOL APIENTRY
1025 NtUserGetUpdateRect(HWND hWnd, LPRECT UnsafeRect, BOOL bErase)
1026 {
1027    PWND Window;
1028    RECTL Rect;
1029    INT RegionType;
1030    PROSRGNDATA RgnData;
1031    NTSTATUS Status;
1032    DECLARE_RETURN(BOOL);
1033
1034    DPRINT("Enter NtUserGetUpdateRect\n");
1035    UserEnterExclusive();
1036
1037    if (!(Window = UserGetWindowObject(hWnd)))
1038    {
1039       RETURN(FALSE);
1040    }
1041
1042    if (Window->hrgnUpdate == NULL)
1043    {
1044       Rect.left = Rect.top = Rect.right = Rect.bottom = 0;
1045    }
1046    else
1047    {
1048       /* Get the update region bounding box. */
1049       if (Window->hrgnUpdate == (HRGN)1)
1050       {
1051          Rect = Window->rcClient;
1052       }
1053       else
1054       {
1055          RgnData = RGNOBJAPI_Lock(Window->hrgnUpdate, NULL);
1056          ASSERT(RgnData != NULL);
1057          RegionType = REGION_GetRgnBox(RgnData, &Rect);
1058          RGNOBJAPI_Unlock(RgnData);
1059
1060          if (RegionType != ERROR && RegionType != NULLREGION)
1061             RECTL_bIntersectRect(&Rect, &Rect, &Window->rcClient);
1062       }
1063
1064       if (IntIntersectWithParents(Window, &Rect))
1065       {
1066          RECTL_vOffsetRect(&Rect,
1067                           -Window->rcClient.left,
1068                           -Window->rcClient.top);
1069       } else
1070       {
1071          Rect.left = Rect.top = Rect.right = Rect.bottom = 0;
1072       }
1073    }
1074
1075    if (bErase && !RECTL_bIsEmptyRect(&Rect))
1076    {
1077       USER_REFERENCE_ENTRY Ref;
1078       UserRefObjectCo(Window, &Ref);
1079       co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
1080       UserDerefObjectCo(Window);
1081    }
1082
1083    if (UnsafeRect != NULL)
1084    {
1085       Status = MmCopyToCaller(UnsafeRect, &Rect, sizeof(RECTL));
1086       if (!NT_SUCCESS(Status))
1087       {
1088          SetLastWin32Error(ERROR_INVALID_PARAMETER);
1089          RETURN(FALSE);
1090       }
1091    }
1092
1093    RETURN(!RECTL_bIsEmptyRect(&Rect));
1094
1095 CLEANUP:
1096    DPRINT("Leave NtUserGetUpdateRect, ret=%i\n",_ret_);
1097    UserLeave();
1098    END_CLEANUP;
1099 }
1100
1101 /*
1102  * NtUserRedrawWindow
1103  *
1104  * Status
1105  *    @implemented
1106  */
1107
1108 BOOL APIENTRY
1109 NtUserRedrawWindow(
1110    HWND hWnd,
1111    CONST RECT *lprcUpdate,
1112    HRGN hrgnUpdate,
1113    UINT flags)
1114 {
1115    RECTL SafeUpdateRect;
1116    PWND Wnd;
1117    BOOL Ret;
1118    USER_REFERENCE_ENTRY Ref;
1119    NTSTATUS Status = STATUS_SUCCESS;
1120    DECLARE_RETURN(BOOL);
1121
1122    DPRINT("Enter NtUserRedrawWindow\n");
1123    UserEnterExclusive();
1124
1125    if (!(Wnd = UserGetWindowObject(hWnd ? hWnd : IntGetDesktopWindow())))
1126    {
1127       RETURN( FALSE);
1128    }
1129
1130    if (lprcUpdate)
1131    {
1132       _SEH2_TRY
1133       {
1134           ProbeForRead(lprcUpdate, sizeof(RECTL), 1);
1135           RtlCopyMemory(&SafeUpdateRect, lprcUpdate, sizeof(RECTL));
1136       }
1137       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1138       {
1139          Status = _SEH2_GetExceptionCode();
1140       }
1141       _SEH2_END
1142       if (!NT_SUCCESS(Status))
1143       {
1144          SetLastWin32Error(RtlNtStatusToDosError(Status));
1145          RETURN( FALSE);
1146       }
1147    }
1148
1149    if ( flags & ~(RDW_ERASE|RDW_FRAME|RDW_INTERNALPAINT|RDW_INVALIDATE|
1150                   RDW_NOERASE|RDW_NOFRAME|RDW_NOINTERNALPAINT|RDW_VALIDATE|
1151                   RDW_ERASENOW|RDW_UPDATENOW|RDW_ALLCHILDREN|RDW_NOCHILDREN) )
1152    {
1153       /* RedrawWindow fails only in case that flags are invalid */
1154       SetLastWin32Error(ERROR_INVALID_FLAGS);
1155       RETURN( FALSE);
1156    }
1157
1158    UserRefObjectCo(Wnd, &Ref);
1159
1160    Ret = co_UserRedrawWindow( Wnd,
1161                               lprcUpdate ? &SafeUpdateRect : NULL,
1162                               hrgnUpdate,
1163                               flags);
1164
1165    UserDerefObjectCo(Wnd);
1166
1167    RETURN( Ret);
1168
1169 CLEANUP:
1170    DPRINT("Leave NtUserRedrawWindow, ret=%i\n",_ret_);
1171    UserLeave();
1172    END_CLEANUP;
1173 }
1174
1175 static
1176 INT FASTCALL
1177 UserScrollDC(
1178    HDC hDC,
1179    INT dx,
1180    INT dy,
1181    const RECTL *prcScroll,
1182    const RECTL *prcClip,
1183    HRGN hrgnUpdate,
1184    RECTL *prcUpdate)
1185 {
1186    PDC pDC;
1187    RECTL rcScroll, rcClip, rcSrc, rcDst;
1188    INT Result;
1189
1190    GdiGetClipBox(hDC, &rcClip);
1191    rcScroll = rcClip;
1192    if (prcClip)
1193    {
1194       RECTL_bIntersectRect(&rcClip, &rcClip, prcClip);
1195    }
1196
1197    if (prcScroll)
1198    {
1199       rcScroll = *prcScroll;
1200       RECTL_bIntersectRect(&rcSrc, &rcClip, prcScroll);
1201    }
1202    else
1203    {
1204       rcSrc = rcClip;
1205    }
1206
1207    rcDst = rcSrc;
1208    RECTL_vOffsetRect(&rcDst, dx, dy);
1209    RECTL_bIntersectRect(&rcDst, &rcDst, &rcClip);
1210
1211    if (!NtGdiBitBlt( hDC,
1212                      rcDst.left,
1213                      rcDst.top,
1214                      rcDst.right - rcDst.left,
1215                      rcDst.bottom - rcDst.top,
1216                      hDC,
1217                      rcDst.left - dx,
1218                      rcDst.top - dy,
1219                      SRCCOPY,
1220                      0,
1221                      0))
1222    {
1223       return ERROR;
1224    }
1225
1226    /* Calculate the region that was invalidated by moving or
1227       could not be copied, because it was not visible */
1228    if (hrgnUpdate || prcUpdate)
1229    {
1230       HRGN hrgnOwn, hrgnVisible, hrgnTmp;
1231
1232       pDC = DC_LockDc(hDC);
1233       if (!pDC)
1234       {
1235          return FALSE;
1236       }
1237       hrgnVisible = ((PROSRGNDATA)pDC->prgnVis)->BaseObject.hHmgr;  // pDC->prgnRao?
1238
1239       /* Begin with the shifted and then clipped scroll rect */
1240       rcDst = rcScroll;
1241       RECTL_vOffsetRect(&rcDst, dx, dy);
1242       RECTL_bIntersectRect(&rcDst, &rcDst, &rcClip);
1243       if (hrgnUpdate)
1244       {
1245          hrgnOwn = hrgnUpdate;
1246          if (!NtGdiSetRectRgn(hrgnOwn, rcDst.left, rcDst.top, rcDst.right, rcDst.bottom))
1247          {
1248             return ERROR;
1249          }
1250       }
1251       else
1252       {
1253          hrgnOwn = IntSysCreateRectRgnIndirect(&rcDst);
1254       }
1255
1256       /* Add the source rect */
1257       hrgnTmp = IntSysCreateRectRgnIndirect(&rcSrc);
1258       NtGdiCombineRgn(hrgnOwn, hrgnOwn, hrgnTmp, RGN_OR);
1259
1260       /* Substract the part of the dest that was visible in source */
1261       NtGdiCombineRgn(hrgnTmp, hrgnTmp, hrgnVisible, RGN_AND);
1262       NtGdiOffsetRgn(hrgnTmp, dx, dy);
1263       Result = NtGdiCombineRgn(hrgnOwn, hrgnOwn, hrgnTmp, RGN_DIFF);
1264
1265           /* DO NOT Unlock DC while messing with prgnVis! */
1266           DC_UnlockDc(pDC);
1267
1268       REGION_FreeRgnByHandle(hrgnTmp);
1269
1270       if (prcUpdate)
1271       {
1272          IntGdiGetRgnBox(hrgnOwn, prcUpdate);
1273       }
1274
1275       if (!hrgnUpdate)
1276       {
1277          REGION_FreeRgnByHandle(hrgnOwn);
1278       }
1279    }
1280    else
1281       Result = NULLREGION;
1282
1283    return Result;
1284 }
1285
1286 /*
1287  * NtUserScrollDC
1288  *
1289  * Status
1290  *    @implemented
1291  */
1292 BOOL APIENTRY
1293 NtUserScrollDC(
1294    HDC hDC,
1295    INT dx,
1296    INT dy,
1297    const RECT *prcUnsafeScroll,
1298    const RECT *prcUnsafeClip,
1299    HRGN hrgnUpdate,
1300    LPRECT prcUnsafeUpdate)
1301 {
1302    DECLARE_RETURN(DWORD);
1303    RECTL rcScroll, rcClip, rcUpdate;
1304    NTSTATUS Status = STATUS_SUCCESS;
1305    DWORD Result;
1306
1307    DPRINT("Enter NtUserScrollDC\n");
1308    UserEnterExclusive();
1309
1310    _SEH2_TRY
1311    {
1312       if (prcUnsafeScroll)
1313       {
1314          ProbeForRead(prcUnsafeScroll, sizeof(*prcUnsafeScroll), 1);
1315          rcScroll = *prcUnsafeScroll;
1316       }
1317       if (prcUnsafeClip)
1318       {
1319          ProbeForRead(prcUnsafeClip, sizeof(*prcUnsafeClip), 1);
1320          rcClip = *prcUnsafeClip;
1321       }
1322       if (prcUnsafeUpdate)
1323       {
1324          ProbeForWrite(prcUnsafeUpdate, sizeof(*prcUnsafeUpdate), 1);
1325       }
1326    }
1327    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1328    {
1329       Status = _SEH2_GetExceptionCode();
1330    }
1331    _SEH2_END
1332    if (!NT_SUCCESS(Status))
1333    {
1334       SetLastNtError(Status);
1335       RETURN(FALSE);
1336    }
1337
1338    Result = UserScrollDC( hDC,
1339                           dx,
1340                           dy,
1341                           prcUnsafeScroll? &rcScroll : 0,
1342                           prcUnsafeClip? &rcClip : 0,
1343                           hrgnUpdate,
1344                           prcUnsafeUpdate? &rcUpdate : NULL);
1345    if(Result == ERROR)
1346    {
1347           /* FIXME: Only if hRgnUpdate is invalid we should SetLastError(ERROR_INVALID_HANDLE) */
1348       RETURN(FALSE);
1349    }
1350
1351    if (prcUnsafeUpdate)
1352    {
1353       _SEH2_TRY
1354       {
1355          *prcUnsafeUpdate = rcUpdate;
1356       }
1357       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1358       {
1359          Status = _SEH2_GetExceptionCode();
1360       }
1361       _SEH2_END
1362       if (!NT_SUCCESS(Status))
1363       {
1364          /* FIXME: SetLastError? */
1365          /* FIXME: correct? We have already scrolled! */
1366          RETURN(FALSE);
1367       }
1368    }
1369
1370    RETURN(TRUE);
1371
1372 CLEANUP:
1373    DPRINT("Leave NtUserScrollDC, ret=%i\n",_ret_);
1374    UserLeave();
1375    END_CLEANUP;
1376 }
1377
1378 /*
1379  * NtUserScrollWindowEx
1380  *
1381  * Status
1382  *    @implemented
1383  */
1384
1385 DWORD APIENTRY
1386 NtUserScrollWindowEx(
1387    HWND hWnd,
1388    INT dx,
1389    INT dy,
1390    const RECT *prcUnsafeScroll,
1391    const RECT *prcUnsafeClip,
1392    HRGN hrgnUpdate,
1393    LPRECT prcUnsafeUpdate,
1394    UINT flags)
1395 {
1396    RECTL rcScroll, rcClip, rcCaret, rcUpdate;
1397    INT Result;
1398    PWND Window = NULL, CaretWnd;
1399    HDC hDC;
1400    HRGN hrgnOwn = NULL, hrgnTemp;
1401    HWND hwndCaret;
1402    NTSTATUS Status = STATUS_SUCCESS;
1403    DECLARE_RETURN(DWORD);
1404    USER_REFERENCE_ENTRY Ref, CaretRef;
1405
1406    DPRINT("Enter NtUserScrollWindowEx\n");
1407    UserEnterExclusive();
1408
1409    Window = UserGetWindowObject(hWnd);
1410    if (!Window || !IntIsWindowDrawable(Window))
1411    {
1412       Window = NULL; /* prevent deref at cleanup */
1413       RETURN( ERROR);
1414    }
1415    UserRefObjectCo(Window, &Ref);
1416
1417    IntGetClientRect(Window, &rcClip);
1418
1419    _SEH2_TRY
1420    {
1421       if (prcUnsafeScroll)
1422       {
1423          ProbeForRead(prcUnsafeScroll, sizeof(*prcUnsafeScroll), 1);
1424          RECTL_bIntersectRect(&rcScroll, &rcClip, prcUnsafeScroll);
1425       }
1426       else
1427          rcScroll = rcClip;
1428
1429       if (prcUnsafeClip)
1430       {
1431          ProbeForRead(prcUnsafeClip, sizeof(*prcUnsafeClip), 1);
1432          RECTL_bIntersectRect(&rcClip, &rcClip, prcUnsafeClip);
1433       }
1434    }
1435    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1436    {
1437       Status = _SEH2_GetExceptionCode();
1438    }
1439    _SEH2_END
1440
1441    if (!NT_SUCCESS(Status))
1442    {
1443       SetLastNtError(Status);
1444       RETURN(ERROR);
1445    }
1446
1447    if (rcClip.right <= rcClip.left || rcClip.bottom <= rcClip.top ||
1448          (dx == 0 && dy == 0))
1449    {
1450       RETURN(NULLREGION);
1451    }
1452
1453    if (hrgnUpdate)
1454       hrgnOwn = hrgnUpdate;
1455    else
1456       hrgnOwn = IntSysCreateRectRgn(0, 0, 0, 0);
1457
1458    hDC = UserGetDCEx(Window, 0, DCX_CACHE | DCX_USESTYLE);
1459    if (!hDC)
1460    {
1461       /* FIXME: SetLastError? */
1462       RETURN(ERROR);
1463    }
1464
1465    rcCaret = rcScroll;
1466    hwndCaret = co_IntFixCaret(Window, &rcCaret, flags);
1467
1468    Result = UserScrollDC( hDC,
1469                           dx,
1470                           dy,
1471                          &rcScroll,
1472                          &rcClip,
1473                           hrgnOwn,
1474                           prcUnsafeUpdate? &rcUpdate : NULL);
1475
1476    UserReleaseDC(Window, hDC, FALSE);
1477
1478    /*
1479     * Take into account the fact that some damage may have occurred during
1480     * the scroll.
1481     */
1482
1483    hrgnTemp = IntSysCreateRectRgn(0, 0, 0, 0);
1484    if (co_UserGetUpdateRgn(Window, hrgnTemp, FALSE) != NULLREGION)
1485    {
1486       HRGN hrgnClip = IntSysCreateRectRgnIndirect(&rcClip);
1487       NtGdiOffsetRgn(hrgnTemp, dx, dy);
1488       NtGdiCombineRgn(hrgnTemp, hrgnTemp, hrgnClip, RGN_AND);
1489       co_UserRedrawWindow(Window, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE);
1490       REGION_FreeRgnByHandle(hrgnClip);
1491    }
1492    REGION_FreeRgnByHandle(hrgnTemp);
1493
1494    if (flags & SW_SCROLLCHILDREN)
1495    {
1496       PWND Child;
1497       RECTL rcChild;
1498       POINT ClientOrigin;
1499       USER_REFERENCE_ENTRY WndRef;
1500       RECTL rcDummy;
1501
1502       IntGetClientOrigin(Window, &ClientOrigin);
1503       for (Child = Window->spwndChild; Child; Child = Child->spwndNext)
1504       {
1505          rcChild = Child->rcWindow;
1506          rcChild.left -= ClientOrigin.x;
1507          rcChild.top -= ClientOrigin.y;
1508          rcChild.right -= ClientOrigin.x;
1509          rcChild.bottom -= ClientOrigin.y;
1510
1511          if (! prcUnsafeScroll || RECTL_bIntersectRect(&rcDummy, &rcChild, &rcScroll))
1512          {
1513             UserRefObjectCo(Child, &WndRef);
1514             co_WinPosSetWindowPos(Child, 0, rcChild.left + dx, rcChild.top + dy, 0, 0,
1515                                   SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
1516                                   SWP_NOREDRAW);
1517             UserDerefObjectCo(Child);
1518          }
1519       }
1520    }
1521
1522    if (flags & (SW_INVALIDATE | SW_ERASE))
1523    {
1524       co_UserRedrawWindow(Window, NULL, hrgnOwn, RDW_INVALIDATE | RDW_ERASE |
1525                           ((flags & SW_ERASE) ? RDW_ERASENOW : 0) |
1526                           ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0));
1527    }
1528
1529    if ((CaretWnd = UserGetWindowObject(hwndCaret)))
1530    {
1531       UserRefObjectCo(CaretWnd, &CaretRef);
1532
1533       co_IntSetCaretPos(rcCaret.left + dx, rcCaret.top + dy);
1534       co_UserShowCaret(CaretWnd);
1535
1536       UserDerefObjectCo(CaretWnd);
1537    }
1538
1539    if (prcUnsafeUpdate)
1540    {
1541       _SEH2_TRY
1542       {
1543          /* Probe here, to not fail on invalid pointer before scrolling */
1544          ProbeForWrite(prcUnsafeUpdate, sizeof(*prcUnsafeUpdate), 1);
1545          *prcUnsafeUpdate = rcUpdate;
1546       }
1547       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1548       {
1549          Status = _SEH2_GetExceptionCode();
1550       }
1551       _SEH2_END
1552
1553       if (!NT_SUCCESS(Status))
1554       {
1555          SetLastNtError(Status);
1556          RETURN(ERROR);
1557       }
1558    }
1559
1560    RETURN(Result);
1561
1562 CLEANUP:
1563    if (hrgnOwn && !hrgnUpdate)
1564    {
1565       REGION_FreeRgnByHandle(hrgnOwn);
1566    }
1567
1568    if (Window)
1569       UserDerefObjectCo(Window);
1570
1571    DPRINT("Leave NtUserScrollWindowEx, ret=%i\n",_ret_);
1572    UserLeave();
1573    END_CLEANUP;
1574 }
1575
1576
1577 BOOL
1578 UserDrawSysMenuButton(
1579    PWND pWnd,
1580    HDC hDc,
1581    RECTL *lpRc,
1582    BOOL Down)
1583 {
1584    HICON hIcon;
1585    PCURICON_OBJECT pIcon;
1586
1587    ASSERT(pWnd && lpRc);
1588
1589    /* Get the icon to draw. We don't care about WM_GETICON here. */
1590
1591    hIcon = pWnd->pcls->hIconSm;
1592
1593    if(!hIcon)
1594    {
1595       DPRINT("Wnd class has no small icon.\n");
1596       hIcon = pWnd->pcls->hIcon;
1597    }
1598
1599    if(!hIcon)
1600    {
1601       DPRINT("Wnd class hasn't any icon.\n");
1602       //FIXME: Draw "winlogo" icon.
1603       return FALSE;
1604    }
1605
1606    if(!(pIcon = UserGetCurIconObject(hIcon)))
1607    {
1608       DPRINT1("UserGetCurIconObject() failed!\n");
1609       return FALSE;
1610    }
1611
1612    return UserDrawIconEx(hDc, lpRc->left, lpRc->top, pIcon,
1613                         UserGetSystemMetrics(SM_CXSMICON),
1614                         UserGetSystemMetrics(SM_CYSMICON),
1615                         0, NULL, DI_NORMAL);
1616 }
1617
1618 BOOL
1619 UserDrawCaptionText(
1620    HDC hDc,
1621    const PUNICODE_STRING Text,
1622    const RECTL *lpRc,
1623    UINT uFlags)
1624 {
1625    HFONT hOldFont = NULL, hFont = NULL;
1626    COLORREF OldTextColor;
1627    NONCLIENTMETRICSW nclm;
1628    NTSTATUS Status;
1629    #ifndef NDEBUG
1630    INT i;
1631    DPRINT("%s:", __FUNCTION__);
1632    for(i = 0; i < Text->Length/sizeof(WCHAR); i++)
1633       DbgPrint("%C", Text->Buffer[i]);
1634    DbgPrint(", %d\n", Text->Length/sizeof(WCHAR));
1635    #endif
1636
1637    nclm.cbSize = sizeof(nclm);
1638    if(!UserSystemParametersInfo(SPI_GETNONCLIENTMETRICS,
1639       sizeof(NONCLIENTMETRICS), &nclm, 0))
1640    {
1641       DPRINT1("%s: UserSystemParametersInfo() failed!\n", __FUNCTION__);
1642       return FALSE;
1643    }
1644
1645    IntGdiSetBkMode(hDc, TRANSPARENT);
1646
1647    if(uFlags & DC_SMALLCAP)
1648       Status = TextIntCreateFontIndirect(&nclm.lfSmCaptionFont, &hFont);
1649    else Status = TextIntCreateFontIndirect(&nclm.lfCaptionFont, &hFont);
1650
1651    if(!NT_SUCCESS(Status))
1652    {
1653       DPRINT1("%s: TextIntCreateFontIndirect() failed! Status: 0x%x\n",
1654          __FUNCTION__, Status);
1655       return FALSE;
1656    }
1657
1658    hOldFont = NtGdiSelectFont(hDc, hFont);
1659    if(!hOldFont)
1660    {
1661       DPRINT1("%s: SelectFont() failed!\n", __FUNCTION__);
1662       GreDeleteObject(hFont);
1663       return FALSE;
1664    }
1665
1666    if(uFlags & DC_INBUTTON)
1667       OldTextColor = IntGdiSetTextColor(hDc, IntGetSysColor(COLOR_BTNTEXT));
1668    else OldTextColor = IntGdiSetTextColor(hDc, IntGetSysColor(uFlags & DC_ACTIVE
1669          ? COLOR_CAPTIONTEXT : COLOR_INACTIVECAPTIONTEXT));
1670
1671    //FIXME: If string doesn't fit to rc, truncate it and add ellipsis.
1672
1673    GreExtTextOutW(hDc, lpRc->left,
1674       lpRc->top, 0, NULL, Text->Buffer,
1675       Text->Length/sizeof(WCHAR), NULL, 0);
1676
1677    IntGdiSetTextColor(hDc, OldTextColor);
1678    NtGdiSelectFont(hDc, hOldFont);
1679    GreDeleteObject(hFont);
1680
1681    return TRUE;
1682 }
1683
1684 BOOL UserDrawCaption(
1685    PWND pWnd,
1686    HDC hDc,
1687    RECTL *lpRc,
1688    HFONT hFont,
1689    HICON hIcon,
1690    const PUNICODE_STRING str,
1691    UINT uFlags)
1692 {
1693    BOOL Ret = FALSE;
1694    HBITMAP hMemBmp = NULL, hOldBmp = NULL;
1695    HBRUSH hOldBrush = NULL;
1696    HDC hMemDc = NULL;
1697    ULONG Height;
1698    UINT VCenter = 0, Padding = 0;
1699    RECTL r = *lpRc;
1700    LONG ButtonWidth, IconWidth;
1701    BOOL HasIcon;
1702
1703    //ASSERT(pWnd != NULL);
1704
1705    RECTL_vMakeWellOrdered(lpRc);
1706    hMemBmp = NtGdiCreateCompatibleBitmap(hDc,
1707       lpRc->right - lpRc->left,
1708       lpRc->bottom - lpRc->top);
1709
1710    if(!hMemBmp)
1711    {
1712       DPRINT1("%s: NtGdiCreateCompatibleBitmap() failed!\n", __FUNCTION__);
1713       return FALSE;
1714    }
1715
1716    hMemDc = NtGdiCreateCompatibleDC(hDc);
1717    if(!hMemDc)
1718    {
1719       DPRINT1("%s: NtGdiCreateCompatibleDC() failed!\n", __FUNCTION__);
1720       goto cleanup;
1721    }
1722
1723    hOldBmp = NtGdiSelectBitmap(hMemDc, hMemBmp);
1724    if(!hOldBmp)
1725    {
1726       DPRINT1("%s: NtGdiSelectBitmap() failed!\n", __FUNCTION__);
1727       goto cleanup;
1728    }
1729
1730    Height = UserGetSystemMetrics(SM_CYCAPTION) - 1;
1731    VCenter = (lpRc->bottom - lpRc->top) / 2;
1732    Padding = VCenter - (Height / 2);
1733
1734    if ((!hIcon) && (pWnd != NULL))
1735    {
1736      HasIcon = (uFlags & DC_ICON) && (pWnd->style & WS_SYSMENU)
1737         && !(uFlags & DC_SMALLCAP) && !(pWnd->ExStyle & WS_EX_DLGMODALFRAME)
1738         && !(pWnd->ExStyle & WS_EX_TOOLWINDOW);
1739    }
1740    else
1741      HasIcon = (hIcon != 0);
1742
1743    IconWidth = UserGetSystemMetrics(SM_CXSIZE) + Padding;
1744
1745    r.left = Padding;
1746    r.right = r.left + (lpRc->right - lpRc->left);
1747    r.top = Padding;
1748    r.bottom = r.top + (Height / 2);
1749
1750    // Draw the caption background
1751    if(uFlags & DC_INBUTTON)
1752    {
1753       hOldBrush = NtGdiSelectBrush(hMemDc,
1754          IntGetSysColorBrush(COLOR_3DFACE));
1755
1756       if(!hOldBrush)
1757       {
1758          DPRINT1("%s: NtGdiSelectBrush() failed!\n", __FUNCTION__);
1759          goto cleanup;
1760       }
1761
1762       if(!NtGdiPatBlt(hMemDc, 0, 0,
1763          lpRc->right - lpRc->left,
1764          lpRc->bottom - lpRc->top,
1765          PATCOPY))
1766       {
1767          DPRINT1("%s: NtGdiPatBlt() failed!\n", __FUNCTION__);
1768          goto cleanup;
1769       }
1770
1771       if(HasIcon) r.left+=IconWidth;
1772    }
1773    else
1774    {
1775       r.right = (lpRc->right - lpRc->left);
1776       if(uFlags & DC_SMALLCAP)
1777          ButtonWidth = UserGetSystemMetrics(SM_CXSMSIZE) - 2;
1778       else ButtonWidth = UserGetSystemMetrics(SM_CXSIZE) - 2;
1779
1780       hOldBrush = NtGdiSelectBrush(hMemDc,
1781          IntGetSysColorBrush(uFlags & DC_ACTIVE ?
1782             COLOR_ACTIVECAPTION : COLOR_INACTIVECAPTION));
1783
1784       if(!hOldBrush)
1785       {
1786          DPRINT1("%s: NtGdiSelectBrush() failed!\n", __FUNCTION__);
1787          goto cleanup;
1788       }
1789
1790       if(HasIcon && (uFlags & DC_GRADIENT))
1791       {
1792          NtGdiPatBlt(hMemDc, 0, 0,
1793             IconWidth+1,
1794             lpRc->bottom - lpRc->top,
1795             PATCOPY);
1796          r.left+=IconWidth;
1797       }
1798       else
1799       {
1800          NtGdiPatBlt(hMemDc, 0, 0,
1801             lpRc->right - lpRc->left,
1802             lpRc->bottom - lpRc->top,
1803             PATCOPY);
1804       }
1805
1806       if(uFlags & DC_GRADIENT)
1807       {
1808          static GRADIENT_RECT gcap = {0, 1};
1809          TRIVERTEX vert[2];
1810          COLORREF Colors[2];
1811
1812                  if (pWnd != NULL)
1813                  {
1814                          if(pWnd->style & WS_SYSMENU)
1815                          {
1816                                 r.right -= 3 + ButtonWidth;
1817                                 if(!(uFlags & DC_SMALLCAP))
1818                                 {
1819                                    if(pWnd->style & (WS_MAXIMIZEBOX | WS_MINIMIZEBOX))
1820                                           r.right -= 2 + 2 * ButtonWidth;
1821                                    else r.right -= 2;
1822                                    r.right -= 2;
1823                                 }
1824
1825                                 //Draw buttons background
1826                                 if(!NtGdiSelectBrush(hMemDc,
1827                                    IntGetSysColorBrush(uFlags & DC_ACTIVE ?
1828                                           COLOR_GRADIENTACTIVECAPTION:COLOR_GRADIENTINACTIVECAPTION)))
1829                                 {
1830                                    DPRINT1("%s: NtGdiSelectBrush() failed!\n", __FUNCTION__);
1831                                    goto cleanup;
1832                                 }
1833
1834                                 NtGdiPatBlt(hMemDc,
1835                                    r.right,
1836                                    0,
1837                                    lpRc->right - lpRc->left - r.right,
1838                                    lpRc->bottom - lpRc->top,
1839                                    PATCOPY);
1840                          }
1841                  }
1842
1843          Colors[0] = IntGetSysColor((uFlags & DC_ACTIVE) ?
1844             COLOR_ACTIVECAPTION : COLOR_INACTIVECAPTION);
1845
1846          Colors[1] = IntGetSysColor((uFlags & DC_ACTIVE) ?
1847             COLOR_GRADIENTACTIVECAPTION : COLOR_GRADIENTINACTIVECAPTION);
1848
1849          vert[0].x = r.left;
1850          vert[0].y = 0;
1851          vert[0].Red = (WORD)Colors[0]<<8;
1852          vert[0].Green = (WORD)Colors[0] & 0xFF00;
1853          vert[0].Blue = (WORD)(Colors[0]>>8) & 0xFF00;
1854          vert[0].Alpha = 0;
1855
1856          vert[1].x = r.right;
1857          vert[1].y = lpRc->bottom - lpRc->top;
1858          vert[1].Red = (WORD)Colors[1]<<8;
1859          vert[1].Green = (WORD)Colors[1] & 0xFF00;
1860          vert[1].Blue = (WORD)(Colors[1]>>8) & 0xFF00;
1861          vert[1].Alpha = 0;
1862
1863          if(!GreGradientFill(hMemDc, vert, 2, &gcap,
1864             1, GRADIENT_FILL_RECT_H))
1865          {
1866             DPRINT1("%s: IntGdiGradientFill() failed!\n", __FUNCTION__);
1867          }
1868
1869       } //if(uFlags & DC_GRADIENT)
1870    }
1871
1872    if(HasIcon)
1873    {
1874       r.top ++;
1875       r.left -= --IconWidth;
1876           /* FIXME: Draw the Icon when pWnd == NULL but  hIcon is valid */
1877           if (pWnd != NULL)
1878                 UserDrawSysMenuButton(pWnd, hMemDc, &r, FALSE);
1879
1880       r.left += IconWidth;
1881       r.top --;
1882    }
1883
1884    r.top ++;
1885    r.left += 2;
1886
1887    r.bottom = r.top + Height;
1888
1889    if((uFlags & DC_TEXT))
1890    {
1891       if(!(uFlags & DC_GRADIENT))
1892       {
1893          r.right = (lpRc->right - lpRc->left);
1894
1895          if(uFlags & DC_SMALLCAP)
1896             ButtonWidth = UserGetSystemMetrics(SM_CXSMSIZE) - 2;
1897          else ButtonWidth = UserGetSystemMetrics(SM_CXSIZE) - 2;
1898
1899          if ((pWnd != NULL) && (pWnd->style & WS_SYSMENU))
1900          {
1901             r.right -= 3 + ButtonWidth;
1902             if(! (uFlags & DC_SMALLCAP))
1903             {
1904                if(pWnd->style & (WS_MAXIMIZEBOX | WS_MINIMIZEBOX))
1905                   r.right -= 2 + 2 * ButtonWidth;
1906                else r.right -= 2;
1907                r.right -= 2;
1908             }
1909          }
1910       }
1911
1912           /* FIXME: hFont isn't handled */
1913       if (str)
1914          UserDrawCaptionText(hMemDc, str, &r, uFlags);
1915       else if (pWnd != NULL)
1916       {
1917          UNICODE_STRING ustr;
1918          ustr.Buffer = pWnd->strName.Buffer;
1919          ustr.Length = pWnd->strName.Length;
1920          ustr.MaximumLength = pWnd->strName.MaximumLength;
1921          UserDrawCaptionText(hMemDc, &ustr, &r, uFlags);
1922       }
1923    }
1924
1925    if(!NtGdiBitBlt(hDc, lpRc->left, lpRc->top,
1926       lpRc->right - lpRc->left, lpRc->bottom - lpRc->top,
1927       hMemDc, 0, 0, SRCCOPY, 0, 0))
1928    {
1929       DPRINT1("%s: NtGdiBitBlt() failed!\n", __FUNCTION__);
1930       goto cleanup;
1931    }
1932
1933    Ret = TRUE;
1934
1935 cleanup:
1936    if (hOldBrush) NtGdiSelectBrush(hMemDc, hOldBrush);
1937    if (hOldBmp) NtGdiSelectBitmap(hMemDc, hOldBmp);
1938    if (hMemBmp) GreDeleteObject(hMemBmp);
1939    if (hMemDc) NtGdiDeleteObjectApp(hMemDc);
1940
1941    return Ret;
1942 }
1943
1944 INT
1945 FASTCALL
1946 UserRealizePalette(HDC hdc)
1947 {
1948   HWND hWnd;
1949   DWORD Ret;
1950
1951   Ret = IntGdiRealizePalette(hdc);
1952   if (Ret) // There was a change.
1953   {
1954       hWnd = IntWindowFromDC(hdc);
1955       if (hWnd) // Send broadcast if dc is associated with a window.
1956       {  // FYI: Thread locked in CallOneParam.
1957          co_IntSendMessage((HWND)HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0);
1958       }
1959   }
1960   return Ret;
1961 }
1962
1963 BOOL
1964 APIENTRY
1965 NtUserDrawCaptionTemp(
1966    HWND hWnd,
1967    HDC hDC,
1968    LPCRECT lpRc,
1969    HFONT hFont,
1970    HICON hIcon,
1971    const PUNICODE_STRING str,
1972    UINT uFlags)
1973 {
1974    PWND pWnd = NULL;
1975    UNICODE_STRING SafeStr = {0};
1976    NTSTATUS Status = STATUS_SUCCESS;
1977    RECTL SafeRect;
1978    BOOL Ret;
1979
1980    UserEnterExclusive();
1981
1982    if (hWnd != NULL)
1983    {
1984      if(!(pWnd = UserGetWindowObject(hWnd)))
1985      {
1986         UserLeave();
1987         return FALSE;
1988      }
1989    }
1990
1991    _SEH2_TRY
1992    {
1993       ProbeForRead(lpRc, sizeof(RECTL), sizeof(ULONG));
1994       RtlCopyMemory(&SafeRect, lpRc, sizeof(RECTL));
1995       if (str != NULL)
1996       {
1997          SafeStr = ProbeForReadUnicodeString(str);
1998          if (SafeStr.Length != 0)
1999          {
2000              ProbeForRead( SafeStr.Buffer,
2001                            SafeStr.Length,
2002                             sizeof(WCHAR));
2003          }
2004       }
2005    }
2006    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
2007    {
2008       Status = _SEH2_GetExceptionCode();
2009    }
2010    _SEH2_END;
2011
2012    if (Status != STATUS_SUCCESS)
2013    {
2014       SetLastNtError(Status);
2015       UserLeave();
2016       return FALSE;
2017    }
2018
2019    if (str != NULL)
2020       Ret = UserDrawCaption(pWnd, hDC, &SafeRect, hFont, hIcon, &SafeStr, uFlags);
2021    else
2022       Ret = UserDrawCaption(pWnd, hDC, &SafeRect, hFont, hIcon, NULL, uFlags);
2023
2024    UserLeave();
2025    return Ret;
2026 }
2027
2028 BOOL
2029 APIENTRY
2030 NtUserDrawCaption(HWND hWnd,
2031    HDC hDC,
2032    LPCRECT lpRc,
2033    UINT uFlags)
2034 {
2035         return NtUserDrawCaptionTemp(hWnd, hDC, lpRc, 0, 0, NULL, uFlags);
2036 }
2037
2038 BOOL
2039 APIENTRY
2040 NtUserInvalidateRect(
2041     HWND hWnd,
2042     CONST RECT *lpUnsafeRect,
2043     BOOL bErase)
2044 {
2045     return NtUserRedrawWindow(hWnd, lpUnsafeRect, NULL, RDW_INVALIDATE | (bErase? RDW_ERASE : 0));
2046 }
2047
2048 BOOL
2049 APIENTRY
2050 NtUserInvalidateRgn(
2051     HWND hWnd,
2052     HRGN hRgn,
2053     BOOL bErase)
2054 {
2055     return NtUserRedrawWindow(hWnd, NULL, hRgn, RDW_INVALIDATE | (bErase? RDW_ERASE : 0));
2056 }
2057
2058 BOOL
2059 APIENTRY
2060 NtUserPrintWindow(
2061     HWND hwnd,
2062     HDC  hdcBlt,
2063     UINT nFlags)
2064 {
2065     PWND Window;
2066     BOOL Ret = FALSE;
2067
2068     UserEnterExclusive();
2069
2070     if (hwnd)
2071     {
2072        Window = UserGetWindowObject(hwnd);
2073        // TODO: Add Desktop and MessageBox check via FNID's.
2074        if ( Window )
2075        {
2076           /* Validate flags and check it as a mask for 0 or 1. */
2077           if ( (nFlags & PW_CLIENTONLY) == nFlags)
2078              Ret = IntPrintWindow( Window, hdcBlt, nFlags);
2079           else
2080              SetLastWin32Error(ERROR_INVALID_PARAMETER);
2081        }
2082     }
2083
2084     UserLeave();
2085     return Ret;
2086 }
2087
2088 /* ValidateRect gets redirected to NtUserValidateRect:
2089    http://blog.csdn.net/ntdll/archive/2005/10/19/509299.aspx */
2090 BOOL
2091 APIENTRY
2092 NtUserValidateRect(
2093     HWND hWnd,
2094     const RECT *lpRect)
2095 {
2096     if (hWnd)
2097     {
2098        return NtUserRedrawWindow(hWnd, lpRect, NULL, RDW_VALIDATE );
2099     }
2100     return NtUserRedrawWindow(hWnd, lpRect, NULL, RDW_INVALIDATE|RDW_ERASE|RDW_ERASENOW|RDW_ALLCHILDREN);
2101 }
2102
2103 /* EOF */