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