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:             subsystems/win32/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    if (!Thread->cPaintsReady)
 664       return FALSE;
 665
 666    if ((MsgFilterMin != 0 || MsgFilterMax != 0) &&
 667          (MsgFilterMin > WM_PAINT || MsgFilterMax < WM_PAINT))
 668       return FALSE;
 669
 670    Message->hwnd = IntFindWindowToRepaint(UserGetDesktopWindow(), PsGetCurrentThreadWin32Thread());
 671
 672    if (Message->hwnd == NULL)
 673    {
 674       DPRINT1("PAINTING BUG: Thread marked as containing dirty windows, but no dirty windows found! Counts %d\n",Thread->cPaintsReady);
 675       /* Hack to stop spamming the debuglog ! */
 676       Thread->cPaintsReady = 0;
 677       return FALSE;
 678    }
 679
 680    if (Window != NULL && Message->hwnd != Window->head.h)
 681       return FALSE;
 682
 683    Message->message = WM_PAINT;
 684    Message->wParam = Message->lParam = 0;
 685
 686    return TRUE;
 687 }
 688
 689 static
 690 HWND FASTCALL
 691 co_IntFixCaret(PWND Window, RECTL *lprc, UINT flags)
 692 {
 693    PDESKTOP Desktop;
 694    PTHRDCARETINFO CaretInfo;
 695    HWND hWndCaret;
 696    PWND WndCaret;
 697
 698    ASSERT_REFS_CO(Window);
 699
 700    Desktop = ((PTHREADINFO)PsGetCurrentThread()->Tcb.Win32Thread)->rpdesk;
 701    CaretInfo = ((PUSER_MESSAGE_QUEUE)Desktop->ActiveMessageQueue)->CaretInfo;
 702    hWndCaret = CaretInfo->hWnd;
 703
 704    WndCaret = UserGetWindowObject(hWndCaret);
 705
 706    //fix: check for WndCaret can be null
 707    if (WndCaret == Window ||
 708          ((flags & SW_SCROLLCHILDREN) && IntIsChildWindow(Window, WndCaret)))
 709    {
 710       POINT pt, FromOffset, ToOffset;
 711       RECTL rcCaret;
 712
 713       pt.x = CaretInfo->Pos.x;
 714       pt.y = CaretInfo->Pos.y;
 715       IntGetClientOrigin(WndCaret, &FromOffset);
 716       IntGetClientOrigin(Window, &ToOffset);
 717       rcCaret.left = pt.x;
 718       rcCaret.top = pt.y;
 719       rcCaret.right = pt.x + CaretInfo->Size.cx;
 720       rcCaret.bottom = pt.y + CaretInfo->Size.cy;
 721       if (RECTL_bIntersectRect(lprc, lprc, &rcCaret))
 722       {
 723          co_UserHideCaret(0);
 724          lprc->left = pt.x;
 725          lprc->top = pt.y;
 726          return hWndCaret;
 727       }
 728    }
 729
 730    return 0;
 731 }
 732
 733 BOOL
 734 FASTCALL
 735 IntPrintWindow(
 736     PWND pwnd,
 737     HDC hdcBlt,
 738     UINT nFlags)
 739 {
 740     HDC hdcSrc;
 741     INT cx, cy, xSrc, ySrc;
 742
 743     if ( nFlags & PW_CLIENTONLY)
 744     {
 745        cx = pwnd->rcClient.right - pwnd->rcClient.left;
 746        cy = pwnd->rcClient.bottom - pwnd->rcClient.top;
 747        xSrc = pwnd->rcClient.left - pwnd->rcWindow.left;
 748        ySrc = pwnd->rcClient.top - pwnd->rcWindow.top;
 749     }
 750     else
 751     {
 752        cx = pwnd->rcWindow.right - pwnd->rcWindow.left;
 753        cy = pwnd->rcWindow.bottom - pwnd->rcWindow.top;
 754        xSrc = 0;
 755        ySrc = 0;
 756     }
 757
 758     // TODO: Setup Redirection for Print.
 759     return FALSE;
 760
 761     /* Update the window just incase. */
 762     co_IntPaintWindows( pwnd, RDW_ERASENOW|RDW_UPDATENOW, FALSE);
 763
 764     hdcSrc = UserGetDCEx( pwnd, NULL, DCX_CACHE|DCX_WINDOW);
 765     /* Print window to printer context. */
 766     NtGdiBitBlt( hdcBlt,
 767                  0,
 768                  0,
 769                  cx,
 770                  cy,
 771                  hdcSrc,
 772                  xSrc,
 773                  ySrc,
 774                  SRCCOPY,
 775                  0,
 776                  0);
 777
 778     UserReleaseDC( pwnd, hdcSrc, FALSE);
 779
 780     // TODO: Release Redirection from Print.
 781
 782     return TRUE;
 783 }
 784
 785 /* PUBLIC FUNCTIONS ***********************************************************/
 786
 787 /*
 788  * NtUserBeginPaint
 789  *
 790  * Status
 791  *    @implemented
 792  */
 793
 794 HDC APIENTRY
 795 NtUserBeginPaint(HWND hWnd, PAINTSTRUCT* UnsafePs)
 796 {
 797    PWND Window = NULL;
 798    PAINTSTRUCT Ps;
 799    NTSTATUS Status;
 800    DECLARE_RETURN(HDC);
 801    USER_REFERENCE_ENTRY Ref;
 802
 803    DPRINT("Enter NtUserBeginPaint\n");
 804    UserEnterExclusive();
 805
 806    if (!(Window = UserGetWindowObject(hWnd)))
 807    {
 808       RETURN( NULL);
 809    }
 810
 811    UserRefObjectCo(Window, &Ref);
 812
 813    co_UserHideCaret(Window);
 814
 815    if (Window->state & WNDS_SENDNCPAINT)
 816    {
 817       HRGN hRgn;
 818
 819       hRgn = IntGetNCUpdateRgn(Window, FALSE);
 820       Window->state &= ~WNDS_SENDNCPAINT;
 821       MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 822       co_IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)hRgn, 0);
 823       if (hRgn != (HANDLE)1 && hRgn != NULL)
 824       {
 825          /* NOTE: The region can already by deleted! */
 826          GDIOBJ_FreeObjByHandle(hRgn, GDI_OBJECT_TYPE_REGION | GDI_OBJECT_TYPE_SILENT);
 827       }
 828    }
 829
 830    RtlZeroMemory(&Ps, sizeof(PAINTSTRUCT));
 831
 832    Ps.hdc = UserGetDCEx( Window,
 833                          Window->hrgnUpdate,
 834                          DCX_INTERSECTRGN | DCX_USESTYLE);
 835    if (!Ps.hdc)
 836    {
 837       RETURN(NULL);
 838    }
 839
 840    if (Window->hrgnUpdate != NULL)
 841    {
 842       MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 843       GdiGetClipBox(Ps.hdc, &Ps.rcPaint);
 844       IntGdiSetRegionOwner(Window->hrgnUpdate, GDI_OBJ_HMGR_POWNED);
 845       /* The region is part of the dc now and belongs to the process! */
 846       Window->hrgnUpdate = NULL;
 847    }
 848    else
 849    {
 850       if (Window->state & WNDS_INTERNALPAINT)
 851          MsqDecPaintCountQueue(Window->head.pti->MessageQueue);
 852
 853       IntGetClientRect(Window, &Ps.rcPaint);
 854    }
 855
 856    Window->state &= ~WNDS_INTERNALPAINT;
 857
 858    if (Window->state & WNDS_ERASEBACKGROUND)
 859    {
 860       Window->state &= ~WNDS_ERASEBACKGROUND;
 861       Ps.fErase = !co_IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)Ps.hdc, 0);
 862    }
 863    else
 864    {
 865       Ps.fErase = FALSE;
 866    }
 867    if (Window->hrgnUpdate)
 868    {
 869       if (!(Window->style & WS_CLIPCHILDREN))
 870       {
 871          PWND Child;
 872          for (Child = Window->spwndChild; Child; Child = Child->spwndNext)
 873          {
 874             IntInvalidateWindows(Child, Window->hrgnUpdate, RDW_FRAME | RDW_ERASE | RDW_INVALIDATE | RDW_ALLCHILDREN);
 875          }
 876       }
 877    }
 878
 879    Status = MmCopyToCaller(UnsafePs, &Ps, sizeof(PAINTSTRUCT));
 880    if (! NT_SUCCESS(Status))
 881    {
 882       SetLastNtError(Status);
 883       RETURN(NULL);
 884    }
 885
 886    RETURN(Ps.hdc);
 887
 888 CLEANUP:
 889    if (Window) UserDerefObjectCo(Window);
 890
 891    DPRINT("Leave NtUserBeginPaint, ret=%i\n",_ret_);
 892    UserLeave();
 893    END_CLEANUP;
 894
 895 }
 896
 897 /*
 898  * NtUserEndPaint
 899  *
 900  * Status
 901  *    @implemented
 902  */
 903
 904 BOOL APIENTRY
 905 NtUserEndPaint(HWND hWnd, CONST PAINTSTRUCT* pUnsafePs)
 906 {
 907    NTSTATUS Status = STATUS_SUCCESS;
 908    PWND Window;
 909    DECLARE_RETURN(BOOL);
 910    USER_REFERENCE_ENTRY Ref;
 911    HDC hdc = NULL;
 912
 913    DPRINT("Enter NtUserEndPaint\n");
 914    UserEnterExclusive();
 915
 916    if (!(Window = UserGetWindowObject(hWnd)))
 917    {
 918       RETURN(FALSE);
 919    }
 920
 921    _SEH2_TRY
 922    {
 923       ProbeForRead(pUnsafePs, sizeof(*pUnsafePs), 1);
 924       hdc = pUnsafePs->hdc;
 925    }
 926    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
 927    {
 928       Status = _SEH2_GetExceptionCode();
 929    }
 930    _SEH2_END
 931    if (!NT_SUCCESS(Status))
 932    {
 933       RETURN(FALSE);
 934    }
 935
 936    UserReleaseDC(Window, hdc, TRUE);
 937
 938    UserRefObjectCo(Window, &Ref);
 939    co_UserShowCaret(Window);
 940    UserDerefObjectCo(Window);
 941
 942    RETURN(TRUE);
 943
 944 CLEANUP:
 945    DPRINT("Leave NtUserEndPaint, ret=%i\n",_ret_);
 946    UserLeave();
 947    END_CLEANUP;
 948 }
 949
 950
 951 INT FASTCALL
 952 co_UserGetUpdateRgn(PWND Window, HRGN hRgn, BOOL bErase)
 953 {
 954    int RegionType;
 955    RECTL Rect;
 956
 957    ASSERT_REFS_CO(Window);
 958
 959    if (Window->hrgnUpdate == NULL)
 960    {
 961       RegionType = (NtGdiSetRectRgn(hRgn, 0, 0, 0, 0) ? NULLREGION : ERROR);
 962    }
 963    else
 964    {
 965       Rect = Window->rcClient;
 966       IntIntersectWithParents(Window, &Rect);
 967       NtGdiSetRectRgn(hRgn, Rect.left, Rect.top, Rect.right, Rect.bottom);
 968       RegionType = NtGdiCombineRgn(hRgn, hRgn, Window->hrgnUpdate, RGN_AND);
 969       NtGdiOffsetRgn(hRgn, -Window->rcClient.left, -Window->rcClient.top);
 970    }
 971
 972    if (bErase && RegionType != NULLREGION && RegionType != ERROR)
 973    {
 974       co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
 975    }
 976
 977    return RegionType;
 978 }
 979
 980 /*
 981  * NtUserGetUpdateRgn
 982  *
 983  * Status
 984  *    @implemented
 985  */
 986
 987 INT APIENTRY
 988 NtUserGetUpdateRgn(HWND hWnd, HRGN hRgn, BOOL bErase)
 989 {
 990    DECLARE_RETURN(INT);
 991    PWND Window;
 992    INT ret;
 993    USER_REFERENCE_ENTRY Ref;
 994
 995    DPRINT("Enter NtUserGetUpdateRgn\n");
 996    UserEnterExclusive();
 997
 998    if (!(Window = UserGetWindowObject(hWnd)))
 999    {
1000       RETURN(ERROR);
1001    }
1002
1003    UserRefObjectCo(Window, &Ref);
1004    ret = co_UserGetUpdateRgn(Window, hRgn, bErase);
1005    UserDerefObjectCo(Window);
1006
1007    RETURN(ret);
1008
1009 CLEANUP:
1010    DPRINT("Leave NtUserGetUpdateRgn, ret=%i\n",_ret_);
1011    UserLeave();
1012    END_CLEANUP;
1013 }
1014
1015 /*
1016  * NtUserGetUpdateRect
1017  *
1018  * Status
1019  *    @implemented
1020  */
1021
1022 BOOL APIENTRY
1023 NtUserGetUpdateRect(HWND hWnd, LPRECT UnsafeRect, BOOL bErase)
1024 {
1025    PWND Window;
1026    RECTL Rect;
1027    INT RegionType;
1028    PROSRGNDATA RgnData;
1029    NTSTATUS Status;
1030    DECLARE_RETURN(BOOL);
1031
1032    DPRINT("Enter NtUserGetUpdateRect\n");
1033    UserEnterExclusive();
1034
1035    if (!(Window = UserGetWindowObject(hWnd)))
1036    {
1037       RETURN(FALSE);
1038    }
1039
1040    if (Window->hrgnUpdate == NULL)
1041    {
1042       Rect.left = Rect.top = Rect.right = Rect.bottom = 0;
1043    }
1044    else
1045    {
1046       /* Get the update region bounding box. */
1047       if (Window->hrgnUpdate == (HRGN)1)
1048       {
1049          Rect = Window->rcClient;
1050       }
1051       else
1052       {
1053          RgnData = RGNOBJAPI_Lock(Window->hrgnUpdate, NULL);
1054          ASSERT(RgnData != NULL);
1055          RegionType = REGION_GetRgnBox(RgnData, &Rect);
1056          RGNOBJAPI_Unlock(RgnData);
1057
1058          if (RegionType != ERROR && RegionType != NULLREGION)
1059             RECTL_bIntersectRect(&Rect, &Rect, &Window->rcClient);
1060       }
1061
1062       if (IntIntersectWithParents(Window, &Rect))
1063       {
1064          RECTL_vOffsetRect(&Rect,
1065                           -Window->rcClient.left,
1066                           -Window->rcClient.top);
1067       } else
1068       {
1069          Rect.left = Rect.top = Rect.right = Rect.bottom = 0;
1070       }
1071    }
1072
1073    if (bErase && !RECTL_bIsEmptyRect(&Rect))
1074    {
1075       USER_REFERENCE_ENTRY Ref;
1076       UserRefObjectCo(Window, &Ref);
1077       co_UserRedrawWindow(Window, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
1078       UserDerefObjectCo(Window);
1079    }
1080
1081    if (UnsafeRect != NULL)
1082    {
1083       Status = MmCopyToCaller(UnsafeRect, &Rect, sizeof(RECTL));
1084       if (!NT_SUCCESS(Status))
1085       {
1086          EngSetLastError(ERROR_INVALID_PARAMETER);
1087          RETURN(FALSE);
1088       }
1089    }
1090
1091    RETURN(!RECTL_bIsEmptyRect(&Rect));
1092
1093 CLEANUP:
1094    DPRINT("Leave NtUserGetUpdateRect, ret=%i\n",_ret_);
1095    UserLeave();
1096    END_CLEANUP;
1097 }
1098
1099 /*
1100  * NtUserRedrawWindow
1101  *
1102  * Status
1103  *    @implemented
1104  */
1105
1106 BOOL APIENTRY
1107 NtUserRedrawWindow(
1108    HWND hWnd,
1109    CONST RECT *lprcUpdate,
1110    HRGN hrgnUpdate,
1111    UINT flags)
1112 {
1113    RECTL SafeUpdateRect;
1114    PWND Wnd;
1115    BOOL Ret;
1116    USER_REFERENCE_ENTRY Ref;
1117    NTSTATUS Status = STATUS_SUCCESS;
1118    DECLARE_RETURN(BOOL);
1119
1120    DPRINT("Enter NtUserRedrawWindow\n");
1121    UserEnterExclusive();
1122
1123    if (!(Wnd = UserGetWindowObject(hWnd ? hWnd : IntGetDesktopWindow())))
1124    {
1125       RETURN( FALSE);
1126    }
1127
1128    if (lprcUpdate)
1129    {
1130       _SEH2_TRY
1131       {
1132           ProbeForRead(lprcUpdate, sizeof(RECTL), 1);
1133           RtlCopyMemory(&SafeUpdateRect, lprcUpdate, sizeof(RECTL));
1134       }
1135       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1136       {
1137          Status = _SEH2_GetExceptionCode();
1138       }
1139       _SEH2_END
1140       if (!NT_SUCCESS(Status))
1141       {
1142          EngSetLastError(RtlNtStatusToDosError(Status));
1143          RETURN( FALSE);
1144       }
1145    }
1146
1147    if ( flags & ~(RDW_ERASE|RDW_FRAME|RDW_INTERNALPAINT|RDW_INVALIDATE|
1148                   RDW_NOERASE|RDW_NOFRAME|RDW_NOINTERNALPAINT|RDW_VALIDATE|
1149                   RDW_ERASENOW|RDW_UPDATENOW|RDW_ALLCHILDREN|RDW_NOCHILDREN) )
1150    {
1151       /* RedrawWindow fails only in case that flags are invalid */
1152       EngSetLastError(ERROR_INVALID_FLAGS);
1153       RETURN( FALSE);
1154    }
1155
1156    UserRefObjectCo(Wnd, &Ref);
1157
1158    Ret = co_UserRedrawWindow( Wnd,
1159                               lprcUpdate ? &SafeUpdateRect : NULL,
1160                               hrgnUpdate,
1161                               flags);
1162
1163    UserDerefObjectCo(Wnd);
1164
1165    RETURN( Ret);
1166
1167 CLEANUP:
1168    DPRINT("Leave NtUserRedrawWindow, ret=%i\n",_ret_);
1169    UserLeave();
1170    END_CLEANUP;
1171 }
1172
1173 static
1174 INT FASTCALL
1175 UserScrollDC(
1176    HDC hDC,
1177    INT dx,
1178    INT dy,
1179    const RECTL *prcScroll,
1180    const RECTL *prcClip,
1181    HRGN hrgnUpdate,
1182    RECTL *prcUpdate)
1183 {
1184    PDC pDC;
1185    RECTL rcScroll, rcClip, rcSrc, rcDst;
1186    INT Result;
1187
1188    GdiGetClipBox(hDC, &rcClip);
1189    rcScroll = rcClip;
1190    if (prcClip)
1191    {
1192       RECTL_bIntersectRect(&rcClip, &rcClip, prcClip);
1193    }
1194
1195    if (prcScroll)
1196    {
1197       rcScroll = *prcScroll;
1198       RECTL_bIntersectRect(&rcSrc, &rcClip, prcScroll);
1199    }
1200    else
1201    {
1202       rcSrc = rcClip;
1203    }
1204
1205    rcDst = rcSrc;
1206    RECTL_vOffsetRect(&rcDst, dx, dy);
1207    RECTL_bIntersectRect(&rcDst, &rcDst, &rcClip);
1208
1209    if (!NtGdiBitBlt( hDC,
1210                      rcDst.left,
1211                      rcDst.top,
1212                      rcDst.right - rcDst.left,
1213                      rcDst.bottom - rcDst.top,
1214                      hDC,
1215                      rcDst.left - dx,
1216                      rcDst.top - dy,
1217                      SRCCOPY,
1218                      0,
1219                      0))
1220    {
1221       return ERROR;
1222    }
1223
1224    /* Calculate the region that was invalidated by moving or
1225       could not be copied, because it was not visible */
1226    if (hrgnUpdate || prcUpdate)
1227    {
1228       HRGN hrgnOwn, hrgnVisible, hrgnTmp;
1229
1230       pDC = DC_LockDc(hDC);
1231       if (!pDC)
1232       {
1233          return FALSE;
1234       }
1235       hrgnVisible = ((PROSRGNDATA)pDC->prgnVis)->BaseObject.hHmgr;  // pDC->prgnRao?
1236
1237       /* Begin with the shifted and then clipped scroll rect */
1238       rcDst = rcScroll;
1239       RECTL_vOffsetRect(&rcDst, dx, dy);
1240       RECTL_bIntersectRect(&rcDst, &rcDst, &rcClip);
1241       if (hrgnUpdate)
1242       {
1243          hrgnOwn = hrgnUpdate;
1244          if (!NtGdiSetRectRgn(hrgnOwn, rcDst.left, rcDst.top, rcDst.right, rcDst.bottom))
1245          {
1246             return ERROR;
1247          }
1248       }
1249       else
1250       {
1251          hrgnOwn = IntSysCreateRectRgnIndirect(&rcDst);
1252       }
1253
1254       /* Add the source rect */
1255       hrgnTmp = IntSysCreateRectRgnIndirect(&rcSrc);
1256       NtGdiCombineRgn(hrgnOwn, hrgnOwn, hrgnTmp, RGN_OR);
1257
1258       /* Substract the part of the dest that was visible in source */
1259       NtGdiCombineRgn(hrgnTmp, hrgnTmp, hrgnVisible, RGN_AND);
1260       NtGdiOffsetRgn(hrgnTmp, dx, dy);
1261       Result = NtGdiCombineRgn(hrgnOwn, hrgnOwn, hrgnTmp, RGN_DIFF);
1262
1263           /* DO NOT Unlock DC while messing with prgnVis! */
1264           DC_UnlockDc(pDC);
1265
1266       REGION_FreeRgnByHandle(hrgnTmp);
1267
1268       if (prcUpdate)
1269       {
1270          IntGdiGetRgnBox(hrgnOwn, prcUpdate);
1271       }
1272
1273       if (!hrgnUpdate)
1274       {
1275          REGION_FreeRgnByHandle(hrgnOwn);
1276       }
1277    }
1278    else
1279       Result = NULLREGION;
1280
1281    return Result;
1282 }
1283
1284 /*
1285  * NtUserScrollDC
1286  *
1287  * Status
1288  *    @implemented
1289  */
1290 BOOL APIENTRY
1291 NtUserScrollDC(
1292    HDC hDC,
1293    INT dx,
1294    INT dy,
1295    const RECT *prcUnsafeScroll,
1296    const RECT *prcUnsafeClip,
1297    HRGN hrgnUpdate,
1298    LPRECT prcUnsafeUpdate)
1299 {
1300    DECLARE_RETURN(DWORD);
1301    RECTL rcScroll, rcClip, rcUpdate;
1302    NTSTATUS Status = STATUS_SUCCESS;
1303    DWORD Result;
1304
1305    DPRINT("Enter NtUserScrollDC\n");
1306    UserEnterExclusive();
1307
1308    _SEH2_TRY
1309    {
1310       if (prcUnsafeScroll)
1311       {
1312          ProbeForRead(prcUnsafeScroll, sizeof(*prcUnsafeScroll), 1);
1313          rcScroll = *prcUnsafeScroll;
1314       }
1315       if (prcUnsafeClip)
1316       {
1317          ProbeForRead(prcUnsafeClip, sizeof(*prcUnsafeClip), 1);
1318          rcClip = *prcUnsafeClip;
1319       }
1320       if (prcUnsafeUpdate)
1321       {
1322          ProbeForWrite(prcUnsafeUpdate, sizeof(*prcUnsafeUpdate), 1);
1323       }
1324    }
1325    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1326    {
1327       Status = _SEH2_GetExceptionCode();
1328    }
1329    _SEH2_END
1330    if (!NT_SUCCESS(Status))
1331    {
1332       SetLastNtError(Status);
1333       RETURN(FALSE);
1334    }
1335
1336    Result = UserScrollDC( hDC,
1337                           dx,
1338                           dy,
1339                           prcUnsafeScroll? &rcScroll : 0,
1340                           prcUnsafeClip? &rcClip : 0,
1341                           hrgnUpdate,
1342                           prcUnsafeUpdate? &rcUpdate : NULL);
1343    if(Result == ERROR)
1344    {
1345           /* FIXME: Only if hRgnUpdate is invalid we should SetLastError(ERROR_INVALID_HANDLE) */
1346       RETURN(FALSE);
1347    }
1348
1349    if (prcUnsafeUpdate)
1350    {
1351       _SEH2_TRY
1352       {
1353          *prcUnsafeUpdate = rcUpdate;
1354       }
1355       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1356       {
1357          Status = _SEH2_GetExceptionCode();
1358       }
1359       _SEH2_END
1360       if (!NT_SUCCESS(Status))
1361       {
1362          /* FIXME: SetLastError? */
1363          /* FIXME: correct? We have already scrolled! */
1364          RETURN(FALSE);
1365       }
1366    }
1367
1368    RETURN(TRUE);
1369
1370 CLEANUP:
1371    DPRINT("Leave NtUserScrollDC, ret=%i\n",_ret_);
1372    UserLeave();
1373    END_CLEANUP;
1374 }
1375
1376 /*
1377  * NtUserScrollWindowEx
1378  *
1379  * Status
1380  *    @implemented
1381  */
1382
1383 DWORD APIENTRY
1384 NtUserScrollWindowEx(
1385    HWND hWnd,
1386    INT dx,
1387    INT dy,
1388    const RECT *prcUnsafeScroll,
1389    const RECT *prcUnsafeClip,
1390    HRGN hrgnUpdate,
1391    LPRECT prcUnsafeUpdate,
1392    UINT flags)
1393 {
1394    RECTL rcScroll, rcClip, rcCaret, rcUpdate;
1395    INT Result;
1396    PWND Window = NULL, CaretWnd;
1397    HDC hDC;
1398    HRGN hrgnOwn = NULL, hrgnTemp;
1399    HWND hwndCaret;
1400    NTSTATUS Status = STATUS_SUCCESS;
1401    DECLARE_RETURN(DWORD);
1402    USER_REFERENCE_ENTRY Ref, CaretRef;
1403
1404    DPRINT("Enter NtUserScrollWindowEx\n");
1405    UserEnterExclusive();
1406
1407    Window = UserGetWindowObject(hWnd);
1408    if (!Window || !IntIsWindowDrawable(Window))
1409    {
1410       Window = NULL; /* prevent deref at cleanup */
1411       RETURN( ERROR);
1412    }
1413    UserRefObjectCo(Window, &Ref);
1414
1415    IntGetClientRect(Window, &rcClip);
1416
1417    _SEH2_TRY
1418    {
1419       if (prcUnsafeScroll)
1420       {
1421          ProbeForRead(prcUnsafeScroll, sizeof(*prcUnsafeScroll), 1);
1422          RECTL_bIntersectRect(&rcScroll, &rcClip, prcUnsafeScroll);
1423       }
1424       else
1425          rcScroll = rcClip;
1426
1427       if (prcUnsafeClip)
1428       {
1429          ProbeForRead(prcUnsafeClip, sizeof(*prcUnsafeClip), 1);
1430          RECTL_bIntersectRect(&rcClip, &rcClip, prcUnsafeClip);
1431       }
1432    }
1433    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1434    {
1435       Status = _SEH2_GetExceptionCode();
1436    }
1437    _SEH2_END
1438
1439    if (!NT_SUCCESS(Status))
1440    {
1441       SetLastNtError(Status);
1442       RETURN(ERROR);
1443    }
1444
1445    if (rcClip.right <= rcClip.left || rcClip.bottom <= rcClip.top ||
1446          (dx == 0 && dy == 0))
1447    {
1448       RETURN(NULLREGION);
1449    }
1450
1451    if (hrgnUpdate)
1452       hrgnOwn = hrgnUpdate;
1453    else
1454       hrgnOwn = IntSysCreateRectRgn(0, 0, 0, 0);
1455
1456    hDC = UserGetDCEx(Window, 0, DCX_CACHE | DCX_USESTYLE);
1457    if (!hDC)
1458    {
1459       /* FIXME: SetLastError? */
1460       RETURN(ERROR);
1461    }
1462
1463    rcCaret = rcScroll;
1464    hwndCaret = co_IntFixCaret(Window, &rcCaret, flags);
1465
1466    Result = UserScrollDC( hDC,
1467                           dx,
1468                           dy,
1469                          &rcScroll,
1470                          &rcClip,
1471                           hrgnOwn,
1472                           prcUnsafeUpdate? &rcUpdate : NULL);
1473
1474    UserReleaseDC(Window, hDC, FALSE);
1475
1476    /*
1477     * Take into account the fact that some damage may have occurred during
1478     * the scroll.
1479     */
1480
1481    hrgnTemp = IntSysCreateRectRgn(0, 0, 0, 0);
1482    if (co_UserGetUpdateRgn(Window, hrgnTemp, FALSE) != NULLREGION)
1483    {
1484       HRGN hrgnClip = IntSysCreateRectRgnIndirect(&rcClip);
1485       NtGdiOffsetRgn(hrgnTemp, dx, dy);
1486       NtGdiCombineRgn(hrgnTemp, hrgnTemp, hrgnClip, RGN_AND);
1487       co_UserRedrawWindow(Window, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE);
1488       REGION_FreeRgnByHandle(hrgnClip);
1489    }
1490    REGION_FreeRgnByHandle(hrgnTemp);
1491
1492    if (flags & SW_SCROLLCHILDREN)
1493    {
1494       PWND Child;
1495       RECTL rcChild;
1496       POINT ClientOrigin;
1497       USER_REFERENCE_ENTRY WndRef;
1498       RECTL rcDummy;
1499
1500       IntGetClientOrigin(Window, &ClientOrigin);
1501       for (Child = Window->spwndChild; Child; Child = Child->spwndNext)
1502       {
1503          rcChild = Child->rcWindow;
1504          rcChild.left -= ClientOrigin.x;
1505          rcChild.top -= ClientOrigin.y;
1506          rcChild.right -= ClientOrigin.x;
1507          rcChild.bottom -= ClientOrigin.y;
1508
1509          if (! prcUnsafeScroll || RECTL_bIntersectRect(&rcDummy, &rcChild, &rcScroll))
1510          {
1511             UserRefObjectCo(Child, &WndRef);
1512             co_WinPosSetWindowPos(Child, 0, rcChild.left + dx, rcChild.top + dy, 0, 0,
1513                                   SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
1514                                   SWP_NOREDRAW);
1515             UserDerefObjectCo(Child);
1516          }
1517       }
1518    }
1519
1520    if (flags & (SW_INVALIDATE | SW_ERASE))
1521    {
1522       co_UserRedrawWindow(Window, NULL, hrgnOwn, RDW_INVALIDATE | RDW_ERASE |
1523                           ((flags & SW_ERASE) ? RDW_ERASENOW : 0) |
1524                           ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0));
1525    }
1526
1527    if ((CaretWnd = UserGetWindowObject(hwndCaret)))
1528    {
1529       UserRefObjectCo(CaretWnd, &CaretRef);
1530
1531       co_IntSetCaretPos(rcCaret.left + dx, rcCaret.top + dy);
1532       co_UserShowCaret(CaretWnd);
1533
1534       UserDerefObjectCo(CaretWnd);
1535    }
1536
1537    if (prcUnsafeUpdate)
1538    {
1539       _SEH2_TRY
1540       {
1541          /* Probe here, to not fail on invalid pointer before scrolling */
1542          ProbeForWrite(prcUnsafeUpdate, sizeof(*prcUnsafeUpdate), 1);
1543          *prcUnsafeUpdate = rcUpdate;
1544       }
1545       _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
1546       {
1547          Status = _SEH2_GetExceptionCode();
1548       }
1549       _SEH2_END
1550
1551       if (!NT_SUCCESS(Status))
1552       {
1553          SetLastNtError(Status);
1554          RETURN(ERROR);
1555       }
1556    }
1557
1558    RETURN(Result);
1559
1560 CLEANUP:
1561    if (hrgnOwn && !hrgnUpdate)
1562    {
1563       REGION_FreeRgnByHandle(hrgnOwn);
1564    }
1565
1566    if (Window)
1567       UserDerefObjectCo(Window);
1568
1569    DPRINT("Leave NtUserScrollWindowEx, ret=%i\n",_ret_);
1570    UserLeave();
1571    END_CLEANUP;
1572 }
1573
1574
1575 BOOL
1576 UserDrawSysMenuButton(
1577    PWND pWnd,
1578    HDC hDc,
1579    RECTL *lpRc,
1580    BOOL Down)
1581 {
1582    HICON hIcon;
1583    PCURICON_OBJECT pIcon;
1584
1585    ASSERT(pWnd && lpRc);
1586
1587    /* Get the icon to draw. We don't care about WM_GETICON here. */
1588
1589    hIcon = pWnd->pcls->hIconSm;
1590
1591    if(!hIcon)
1592    {
1593       DPRINT("Wnd class has no small icon.\n");
1594       hIcon = pWnd->pcls->hIcon;
1595    }
1596
1597    if(!hIcon)
1598    {
1599       DPRINT("Wnd class hasn't any icon.\n");
1600       //FIXME: Draw "winlogo" icon.
1601       return FALSE;
1602    }
1603
1604    if(!(pIcon = UserGetCurIconObject(hIcon)))
1605    {
1606       DPRINT1("UserGetCurIconObject() failed!\n");
1607       return FALSE;
1608    }
1609
1610    return UserDrawIconEx(hDc, lpRc->left, lpRc->top, pIcon,
1611                         UserGetSystemMetrics(SM_CXSMICON),
1612                         UserGetSystemMetrics(SM_CYSMICON),
1613                         0, NULL, DI_NORMAL);
1614 }
1615
1616 BOOL
1617 UserDrawCaptionText(
1618    HDC hDc,
1619    const PUNICODE_STRING Text,
1620    const RECTL *lpRc,
1621    UINT uFlags)
1622 {
1623    HFONT hOldFont = NULL, hFont = NULL;
1624    COLORREF OldTextColor;
1625    NONCLIENTMETRICSW nclm;
1626    NTSTATUS Status;
1627    #ifndef NDEBUG
1628    INT i;
1629    DPRINT("%s:", __FUNCTION__);
1630    for(i = 0; i < Text->Length/sizeof(WCHAR); i++)
1631       DbgPrint("%C", Text->Buffer[i]);
1632    DbgPrint(", %d\n", Text->Length/sizeof(WCHAR));
1633    #endif
1634
1635    nclm.cbSize = sizeof(nclm);
1636    if(!UserSystemParametersInfo(SPI_GETNONCLIENTMETRICS,
1637       sizeof(NONCLIENTMETRICS), &nclm, 0))
1638    {
1639       DPRINT1("%s: UserSystemParametersInfo() failed!\n", __FUNCTION__);
1640       return FALSE;
1641    }
1642
1643    IntGdiSetBkMode(hDc, TRANSPARENT);
1644
1645    if(uFlags & DC_SMALLCAP)
1646       Status = TextIntCreateFontIndirect(&nclm.lfSmCaptionFont, &hFont);
1647    else Status = TextIntCreateFontIndirect(&nclm.lfCaptionFont, &hFont);
1648
1649    if(!NT_SUCCESS(Status))
1650    {
1651       DPRINT1("%s: TextIntCreateFontIndirect() failed! Status: 0x%x\n",
1652          __FUNCTION__, Status);
1653       return FALSE;
1654    }
1655
1656    hOldFont = NtGdiSelectFont(hDc, hFont);
1657    if(!hOldFont)
1658    {
1659       DPRINT1("%s: SelectFont() failed!\n", __FUNCTION__);
1660       GreDeleteObject(hFont);
1661       return FALSE;
1662    }
1663
1664    if(uFlags & DC_INBUTTON)
1665       OldTextColor = IntGdiSetTextColor(hDc, IntGetSysColor(COLOR_BTNTEXT));
1666    else OldTextColor = IntGdiSetTextColor(hDc, IntGetSysColor(uFlags & DC_ACTIVE
1667          ? COLOR_CAPTIONTEXT : COLOR_INACTIVECAPTIONTEXT));
1668
1669    //FIXME: If string doesn't fit to rc, truncate it and add ellipsis.
1670
1671    GreExtTextOutW(hDc, lpRc->left,
1672       lpRc->top, 0, NULL, Text->Buffer,
1673       Text->Length/sizeof(WCHAR), NULL, 0);
1674
1675    IntGdiSetTextColor(hDc, OldTextColor);
1676    NtGdiSelectFont(hDc, hOldFont);
1677    GreDeleteObject(hFont);
1678
1679    return TRUE;
1680 }
1681
1682 BOOL UserDrawCaption(
1683    PWND pWnd,
1684    HDC hDc,
1685    RECTL *lpRc,
1686    HFONT hFont,
1687    HICON hIcon,
1688    const PUNICODE_STRING str,
1689    UINT uFlags)
1690 {
1691    BOOL Ret = FALSE;
1692    HBITMAP hMemBmp = NULL, hOldBmp = NULL;
1693    HBRUSH hOldBrush = NULL;
1694    HDC hMemDc = NULL;
1695    ULONG Height;
1696    UINT VCenter = 0, Padding = 0;
1697    RECTL r = *lpRc;
1698    LONG ButtonWidth, IconWidth;
1699    BOOL HasIcon;
1700
1701    //ASSERT(pWnd != NULL);
1702
1703    RECTL_vMakeWellOrdered(lpRc);
1704    hMemBmp = NtGdiCreateCompatibleBitmap(hDc,
1705       lpRc->right - lpRc->left,
1706       lpRc->bottom - lpRc->top);
1707
1708    if(!hMemBmp)
1709    {
1710       DPRINT1("%s: NtGdiCreateCompatibleBitmap() failed!\n", __FUNCTION__);
1711       return FALSE;
1712    }
1713
1714    hMemDc = NtGdiCreateCompatibleDC(hDc);
1715    if(!hMemDc)
1716    {
1717       DPRINT1("%s: NtGdiCreateCompatibleDC() failed!\n", __FUNCTION__);
1718       goto cleanup;
1719    }
1720
1721    hOldBmp = NtGdiSelectBitmap(hMemDc, hMemBmp);
1722    if(!hOldBmp)
1723    {
1724       DPRINT1("%s: NtGdiSelectBitmap() failed!\n", __FUNCTION__);
1725       goto cleanup;
1726    }
1727
1728    Height = UserGetSystemMetrics(SM_CYCAPTION) - 1;
1729    VCenter = (lpRc->bottom - lpRc->top) / 2;
1730    Padding = VCenter - (Height / 2);
1731
1732    if ((!hIcon) && (pWnd != NULL))
1733    {
1734      HasIcon = (uFlags & DC_ICON) && (pWnd->style & WS_SYSMENU)
1735         && !(uFlags & DC_SMALLCAP) && !(pWnd->ExStyle & WS_EX_DLGMODALFRAME)
1736         && !(pWnd->ExStyle & WS_EX_TOOLWINDOW);
1737    }
1738    else
1739      HasIcon = (hIcon != 0);
1740
1741    IconWidth = UserGetSystemMetrics(SM_CXSIZE) + Padding;
1742
1743    r.left = Padding;
1744    r.right = r.left + (lpRc->right - lpRc->left);
1745    r.top = Padding;
1746    r.bottom = r.top + (Height / 2);
1747
1748    // Draw the caption background
1749    if(uFlags & DC_INBUTTON)
1750    {
1751       hOldBrush = NtGdiSelectBrush(hMemDc,
1752          IntGetSysColorBrush(COLOR_3DFACE));
1753
1754       if(!hOldBrush)
1755       {
1756          DPRINT1("%s: NtGdiSelectBrush() failed!\n", __FUNCTION__);
1757          goto cleanup;
1758       }
1759
1760       if(!NtGdiPatBlt(hMemDc, 0, 0,
1761          lpRc->right - lpRc->left,
1762          lpRc->bottom - lpRc->top,
1763          PATCOPY))
1764       {
1765          DPRINT1("%s: NtGdiPatBlt() failed!\n", __FUNCTION__);
1766          goto cleanup;
1767       }
1768
1769       if(HasIcon) r.left+=IconWidth;
1770    }
1771    else
1772    {
1773       r.right = (lpRc->right - lpRc->left);
1774       if(uFlags & DC_SMALLCAP)
1775          ButtonWidth = UserGetSystemMetrics(SM_CXSMSIZE) - 2;
1776       else ButtonWidth = UserGetSystemMetrics(SM_CXSIZE) - 2;
1777
1778       hOldBrush = NtGdiSelectBrush(hMemDc,
1779          IntGetSysColorBrush(uFlags & DC_ACTIVE ?
1780             COLOR_ACTIVECAPTION : COLOR_INACTIVECAPTION));
1781
1782       if(!hOldBrush)
1783       {
1784          DPRINT1("%s: NtGdiSelectBrush() failed!\n", __FUNCTION__);
1785          goto cleanup;
1786       }
1787
1788       if(HasIcon && (uFlags & DC_GRADIENT))
1789       {
1790          NtGdiPatBlt(hMemDc, 0, 0,
1791             IconWidth+1,
1792             lpRc->bottom - lpRc->top,
1793             PATCOPY);
1794          r.left+=IconWidth;
1795       }
1796       else
1797       {
1798          NtGdiPatBlt(hMemDc, 0, 0,
1799             lpRc->right - lpRc->left,
1800             lpRc->bottom - lpRc->top,
1801             PATCOPY);
1802       }
1803
1804       if(uFlags & DC_GRADIENT)
1805       {
1806          static GRADIENT_RECT gcap = {0, 1};
1807          TRIVERTEX vert[2];
1808          COLORREF Colors[2];
1809
1810                  if (pWnd != NULL)
1811                  {
1812                          if(pWnd->style & WS_SYSMENU)
1813                          {
1814                                 r.right -= 3 + ButtonWidth;
1815                                 if(!(uFlags & DC_SMALLCAP))
1816                                 {
1817                                    if(pWnd->style & (WS_MAXIMIZEBOX | WS_MINIMIZEBOX))
1818                                           r.right -= 2 + 2 * ButtonWidth;
1819                                    else r.right -= 2;
1820                                    r.right -= 2;
1821                                 }
1822
1823                                 //Draw buttons background
1824                                 if(!NtGdiSelectBrush(hMemDc,
1825                                    IntGetSysColorBrush(uFlags & DC_ACTIVE ?
1826                                           COLOR_GRADIENTACTIVECAPTION:COLOR_GRADIENTINACTIVECAPTION)))
1827                                 {
1828                                    DPRINT1("%s: NtGdiSelectBrush() failed!\n", __FUNCTION__);
1829                                    goto cleanup;
1830                                 }
1831
1832                                 NtGdiPatBlt(hMemDc,
1833                                    r.right,
1834                                    0,
1835                                    lpRc->right - lpRc->left - r.right,
1836                                    lpRc->bottom - lpRc->top,
1837                                    PATCOPY);
1838                          }
1839                  }
1840
1841          Colors[0] = IntGetSysColor((uFlags & DC_ACTIVE) ?
1842             COLOR_ACTIVECAPTION : COLOR_INACTIVECAPTION);
1843
1844          Colors[1] = IntGetSysColor((uFlags & DC_ACTIVE) ?
1845             COLOR_GRADIENTACTIVECAPTION : COLOR_GRADIENTINACTIVECAPTION);
1846
1847          vert[0].x = r.left;
1848          vert[0].y = 0;
1849          vert[0].Red = (WORD)Colors[0]<<8;
1850          vert[0].Green = (WORD)Colors[0] & 0xFF00;
1851          vert[0].Blue = (WORD)(Colors[0]>>8) & 0xFF00;
1852          vert[0].Alpha = 0;
1853
1854          vert[1].x = r.right;
1855          vert[1].y = lpRc->bottom - lpRc->top;
1856          vert[1].Red = (WORD)Colors[1]<<8;
1857          vert[1].Green = (WORD)Colors[1] & 0xFF00;
1858          vert[1].Blue = (WORD)(Colors[1]>>8) & 0xFF00;
1859          vert[1].Alpha = 0;
1860
1861          if(!GreGradientFill(hMemDc, vert, 2, &gcap,
1862             1, GRADIENT_FILL_RECT_H))
1863          {
1864             DPRINT1("%s: IntGdiGradientFill() failed!\n", __FUNCTION__);
1865          }
1866
1867       } //if(uFlags & DC_GRADIENT)
1868    }
1869
1870    if(HasIcon)
1871    {
1872       r.top ++;
1873       r.left -= --IconWidth;
1874           /* FIXME: Draw the Icon when pWnd == NULL but  hIcon is valid */
1875           if (pWnd != NULL)
1876                 UserDrawSysMenuButton(pWnd, hMemDc, &r, FALSE);
1877
1878       r.left += IconWidth;
1879       r.top --;
1880    }
1881
1882    r.top ++;
1883    r.left += 2;
1884
1885    r.bottom = r.top + Height;
1886
1887    if((uFlags & DC_TEXT))
1888    {
1889       if(!(uFlags & DC_GRADIENT))
1890       {
1891          r.right = (lpRc->right - lpRc->left);
1892
1893          if(uFlags & DC_SMALLCAP)
1894             ButtonWidth = UserGetSystemMetrics(SM_CXSMSIZE) - 2;
1895          else ButtonWidth = UserGetSystemMetrics(SM_CXSIZE) - 2;
1896
1897          if ((pWnd != NULL) && (pWnd->style & WS_SYSMENU))
1898          {
1899             r.right -= 3 + ButtonWidth;
1900             if(! (uFlags & DC_SMALLCAP))
1901             {
1902                if(pWnd->style & (WS_MAXIMIZEBOX | WS_MINIMIZEBOX))
1903                   r.right -= 2 + 2 * ButtonWidth;
1904                else r.right -= 2;
1905                r.right -= 2;
1906             }
1907          }
1908       }
1909
1910           /* FIXME: hFont isn't handled */
1911       if (str)
1912          UserDrawCaptionText(hMemDc, str, &r, uFlags);
1913       else if (pWnd != NULL)
1914       {
1915          UNICODE_STRING ustr;
1916          ustr.Buffer = pWnd->strName.Buffer;
1917          ustr.Length = pWnd->strName.Length;
1918          ustr.MaximumLength = pWnd->strName.MaximumLength;
1919          UserDrawCaptionText(hMemDc, &ustr, &r, uFlags);
1920       }
1921    }
1922
1923    if(!NtGdiBitBlt(hDc, lpRc->left, lpRc->top,
1924       lpRc->right - lpRc->left, lpRc->bottom - lpRc->top,
1925       hMemDc, 0, 0, SRCCOPY, 0, 0))
1926    {
1927       DPRINT1("%s: NtGdiBitBlt() failed!\n", __FUNCTION__);
1928       goto cleanup;
1929    }
1930
1931    Ret = TRUE;
1932
1933 cleanup:
1934    if (hOldBrush) NtGdiSelectBrush(hMemDc, hOldBrush);
1935    if (hOldBmp) NtGdiSelectBitmap(hMemDc, hOldBmp);
1936    if (hMemBmp) GreDeleteObject(hMemBmp);
1937    if (hMemDc) NtGdiDeleteObjectApp(hMemDc);
1938
1939    return Ret;
1940 }
1941
1942 INT
1943 FASTCALL
1944 UserRealizePalette(HDC hdc)
1945 {
1946   HWND hWnd;
1947   DWORD Ret;
1948
1949   Ret = IntGdiRealizePalette(hdc);
1950   if (Ret) // There was a change.
1951   {
1952       hWnd = IntWindowFromDC(hdc);
1953       if (hWnd) // Send broadcast if dc is associated with a window.
1954       {  // FYI: Thread locked in CallOneParam.
1955          UserSendNotifyMessage((HWND)HWND_BROADCAST, WM_PALETTECHANGED, (WPARAM)hWnd, 0);
1956       }
1957   }
1958   return Ret;
1959 }
1960
1961 BOOL
1962 APIENTRY
1963 NtUserDrawCaptionTemp(
1964    HWND hWnd,
1965    HDC hDC,
1966    LPCRECT lpRc,
1967    HFONT hFont,
1968    HICON hIcon,
1969    const PUNICODE_STRING str,
1970    UINT uFlags)
1971 {
1972    PWND pWnd = NULL;
1973    UNICODE_STRING SafeStr = {0};
1974    NTSTATUS Status = STATUS_SUCCESS;
1975    RECTL SafeRect;
1976    BOOL Ret;
1977
1978    UserEnterExclusive();
1979
1980    if (hWnd != NULL)
1981    {
1982      if(!(pWnd = UserGetWindowObject(hWnd)))
1983      {
1984         UserLeave();
1985         return FALSE;
1986      }
1987    }
1988
1989    _SEH2_TRY
1990    {
1991       ProbeForRead(lpRc, sizeof(RECTL), sizeof(ULONG));
1992       RtlCopyMemory(&SafeRect, lpRc, sizeof(RECTL));
1993       if (str != NULL)
1994       {
1995          SafeStr = ProbeForReadUnicodeString(str);
1996          if (SafeStr.Length != 0)
1997          {
1998              ProbeForRead( SafeStr.Buffer,
1999                            SafeStr.Length,
2000                             sizeof(WCHAR));
2001          }
2002       }
2003    }
2004    _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
2005    {
2006       Status = _SEH2_GetExceptionCode();
2007    }
2008    _SEH2_END;
2009
2010    if (Status != STATUS_SUCCESS)
2011    {
2012       SetLastNtError(Status);
2013       UserLeave();
2014       return FALSE;
2015    }
2016
2017    if (str != NULL)
2018       Ret = UserDrawCaption(pWnd, hDC, &SafeRect, hFont, hIcon, &SafeStr, uFlags);
2019    else
2020       Ret = UserDrawCaption(pWnd, hDC, &SafeRect, hFont, hIcon, NULL, uFlags);
2021
2022    UserLeave();
2023    return Ret;
2024 }
2025
2026 BOOL
2027 APIENTRY
2028 NtUserDrawCaption(HWND hWnd,
2029    HDC hDC,
2030    LPCRECT lpRc,
2031    UINT uFlags)
2032 {
2033         return NtUserDrawCaptionTemp(hWnd, hDC, lpRc, 0, 0, NULL, uFlags);
2034 }
2035
2036 BOOL
2037 APIENTRY
2038 NtUserInvalidateRect(
2039     HWND hWnd,
2040     CONST RECT *lpUnsafeRect,
2041     BOOL bErase)
2042 {
2043     return NtUserRedrawWindow(hWnd, lpUnsafeRect, NULL, RDW_INVALIDATE | (bErase? RDW_ERASE : 0));
2044 }
2045
2046 BOOL
2047 APIENTRY
2048 NtUserInvalidateRgn(
2049     HWND hWnd,
2050     HRGN hRgn,
2051     BOOL bErase)
2052 {
2053     return NtUserRedrawWindow(hWnd, NULL, hRgn, RDW_INVALIDATE | (bErase? RDW_ERASE : 0));
2054 }
2055
2056 BOOL
2057 APIENTRY
2058 NtUserPrintWindow(
2059     HWND hwnd,
2060     HDC  hdcBlt,
2061     UINT nFlags)
2062 {
2063     PWND Window;
2064     BOOL Ret = FALSE;
2065
2066     UserEnterExclusive();
2067
2068     if (hwnd)
2069     {
2070        Window = UserGetWindowObject(hwnd);
2071        // TODO: Add Desktop and MessageBox check via FNID's.
2072        if ( Window )
2073        {
2074           /* Validate flags and check it as a mask for 0 or 1. */
2075           if ( (nFlags & PW_CLIENTONLY) == nFlags)
2076              Ret = IntPrintWindow( Window, hdcBlt, nFlags);
2077           else
2078              EngSetLastError(ERROR_INVALID_PARAMETER);
2079        }
2080     }
2081
2082     UserLeave();
2083     return Ret;
2084 }
2085
2086 /* ValidateRect gets redirected to NtUserValidateRect:
2087    http://blog.csdn.net/ntdll/archive/2005/10/19/509299.aspx */
2088 BOOL
2089 APIENTRY
2090 NtUserValidateRect(
2091     HWND hWnd,
2092     const RECT *lpRect)
2093 {
2094     if (hWnd)
2095     {
2096        return NtUserRedrawWindow(hWnd, lpRect, NULL, RDW_VALIDATE );
2097     }
2098     return NtUserRedrawWindow(hWnd, lpRect, NULL, RDW_INVALIDATE|RDW_ERASE|RDW_ERASENOW|RDW_ALLCHILDREN);
2099 }
2100
2101 /* EOF */