windows/painting.c

   1 /*
   2  * Window painting functions
   3  *
   4  * Copyright 1993, 1994, 1995 Alexandre Julliard
   5  *                       1999 Alex Korobka
   6  */
   7
   8 #include "region.h"
   9 #include "win.h"
  10 #include "queue.h"
  11 #include "dce.h"
  12 #include "heap.h"
  13 #include "debugtools.h"
  14 #include "wine/winuser16.h"
  15
  16 DECLARE_DEBUG_CHANNEL(nonclient)
  17 DECLARE_DEBUG_CHANNEL(win)
  18
  19 /* client rect in window coordinates */
  20
  21 #define GETCLIENTRECTW( wnd, r )        (r).left = (wnd)->rectClient.left - (wnd)->rectWindow.left; \
  22                                         (r).top = (wnd)->rectClient.top - (wnd)->rectWindow.top; \
  23                                         (r).right = (wnd)->rectClient.right - (wnd)->rectWindow.left; \
  24                                         (r).bottom = (wnd)->rectClient.bottom - (wnd)->rectWindow.top
  25
  26   /* Last CTLCOLOR id */
  27 #define CTLCOLOR_MAX   CTLCOLOR_STATIC
  28
  29
  30 /***********************************************************************
  31  *           WIN_HaveToDelayNCPAINT
  32  *
  33  * Currently, in the Wine painting mechanism, the WM_NCPAINT message
  34  * is generated as soon as a region intersecting the non-client area
  35  * of a window is invalidated.
  36  *
  37  * This technique will work fine for all windows whose parents
  38  * have the WS_CLIPCHILDREN style. When the parents have that style,
  39  * they are not going to override the contents of their children.
  40  * However, when the parent doesn't have that style, Windows relies
  41  * on a "painter's algorithm" to display the contents of the windows.
  42  * That is, windows are painted from back to front. This includes the
  43  * non-client area.
  44  *
  45  * This method looks at the current state of a window to determine
  46  * if the sending of the WM_NCPAINT message should be delayed until
  47  * the BeginPaint call.
  48  *
  49  * PARAMS:
  50  *   wndPtr   - A Locked window pointer to the window we're
  51  *              examining.
  52  *   uncFlags - This is the flag passed to the WIN_UpdateNCRgn
  53  *              function. This is a shortcut for the cases when
  54  *              we already know when to avoid scanning all the
  55  *              parents of a window. If you already know that this
  56  *              window's NCPAINT should be delayed, set the
  57  *              UNC_DELAY_NCPAINT flag for this parameter.
  58  *
  59  *              This shortcut behavior is implemented in the
  60  *              RDW_Paint() method.
  61  *
  62  */
  63 static BOOL WIN_HaveToDelayNCPAINT(
  64   WND* wndPtr,
  65   UINT uncFlags)
  66 {
  67   WND* parentWnd = NULL;
  68
  69   /*
  70    * Test the shortcut first. (duh)
  71    */
  72   if (uncFlags & UNC_DELAY_NCPAINT)
  73     return TRUE;
  74
  75   /*
  76    * The UNC_IN_BEGINPAINT flag is set in the BeginPaint
  77    * method only. This is another shortcut to avoid going
  78    * up the parent's chain of the window to finally
  79    * figure-out that none of them has an invalid region.
  80    */
  81   if (uncFlags & UNC_IN_BEGINPAINT)
  82     return FALSE;
  83
  84   /*
  85    * Scan all the parents of this window to find a window
  86    * that doesn't have the WS_CLIPCHILDREN style and that
  87    * has an invalid region.
  88    */
  89   parentWnd = WIN_LockWndPtr(wndPtr->parent);
  90
  91   while (parentWnd!=NULL)
  92   {
  93     if ( ((parentWnd->dwStyle & WS_CLIPCHILDREN) == 0) &&
  94          (parentWnd->hrgnUpdate != 0) )
  95     {
  96       WIN_ReleaseWndPtr(parentWnd);
  97       return TRUE;
  98     }
  99
 100     WIN_UpdateWndPtr(&parentWnd, parentWnd->parent);
 101   }
 102
 103   WIN_ReleaseWndPtr(parentWnd);
 104
 105   return FALSE;
 106 }
 107
 108 /***********************************************************************
 109  *           WIN_UpdateNCRgn
 110  *
 111  *  Things to do:
 112  *      Send WM_NCPAINT if required (when nonclient is invalid or UNC_ENTIRE flag is set)
 113  *      Crop hrgnUpdate to a client rect, especially if it 1.
 114  *      If UNC_REGION is set return update region for the client rect.
 115  *
 116  *  NOTE: UNC_REGION is mainly for the RDW_Paint() chunk that sends WM_ERASEBKGND message.
 117  *        The trick is that when the returned region handle may be different from hRgn.
 118  *        In this case the old hRgn must be considered gone. BUT, if the returned value
 119  *        is 1 then the hRgn is preserved and RDW_Paint() will have to get
 120  *        a DC without extra clipping region.
 121  */
 122 HRGN WIN_UpdateNCRgn(WND* wnd, HRGN hRgn, UINT uncFlags )
 123 {
 124     RECT  r;
 125     HRGN  hClip = 0;
 126     HRGN  hrgnRet = 0;
 127
 128     TRACE_(nonclient)("hwnd %04x [%04x] hrgn %04x, unc %04x, ncf %i\n",
 129                       wnd->hwndSelf, wnd->hrgnUpdate, hRgn, uncFlags, wnd->flags & WIN_NEEDS_NCPAINT);
 130
 131     /* desktop window doesn't have a nonclient area */
 132     if(wnd == WIN_GetDesktop())
 133     {
 134         wnd->flags &= ~WIN_NEEDS_NCPAINT;
 135         if( wnd->hrgnUpdate > 1 )
 136             hrgnRet = REGION_CropRgn( hRgn, wnd->hrgnUpdate, NULL, NULL );
 137         else
 138         {
 139             hrgnRet = wnd->hrgnUpdate;
 140         }
 141         WIN_ReleaseDesktop();
 142         return hrgnRet;
 143     }
 144     WIN_ReleaseDesktop();
 145
 146     if ((wnd->hwndSelf == GetForegroundWindow()) &&
 147         !(wnd->flags & WIN_NCACTIVATED) )
 148     {
 149         wnd->flags |= WIN_NCACTIVATED;
 150         uncFlags |= UNC_ENTIRE;
 151     }
 152
 153     /*
 154      * If the window's non-client area needs to be painted,
 155      */
 156     if ( ( wnd->flags & WIN_NEEDS_NCPAINT ) &&
 157          !WIN_HaveToDelayNCPAINT(wnd, uncFlags) )
 158     {
 159             RECT r2, r3;
 160
 161             wnd->flags &= ~WIN_NEEDS_NCPAINT;
 162             GETCLIENTRECTW( wnd, r );
 163
 164             TRACE_(nonclient)( "\tclient box (%i,%i-%i,%i), hrgnUpdate %04x\n",
 165                                 r.left, r.top, r.right, r.bottom, wnd->hrgnUpdate );
 166             if( wnd->hrgnUpdate > 1 )
 167             {
 168                 /* Check if update rgn overlaps with nonclient area */
 169
 170                 GetRgnBox( wnd->hrgnUpdate, &r2 );
 171                 UnionRect( &r3, &r2, &r );
 172                 if( r3.left != r.left || r3.top != r.top ||
 173                     r3.right != r.right || r3.bottom != r.bottom ) /* it does */
 174                 {
 175                     /* crop hrgnUpdate, save old one in hClip - the only
 176                      * case that places a valid region handle in hClip */
 177
 178                     hClip = wnd->hrgnUpdate;
 179                     wnd->hrgnUpdate = REGION_CropRgn( hRgn, hClip, &r, NULL );
 180                     if( uncFlags & UNC_REGION ) hrgnRet = hClip;
 181                 }
 182
 183                 if( uncFlags & UNC_CHECK )
 184                 {
 185                     GetRgnBox( wnd->hrgnUpdate, &r3 );
 186                     if( IsRectEmpty( &r3 ) )
 187                     {
 188                         /* delete the update region since all invalid
 189                          * parts were in the nonclient area */
 190
 191                         DeleteObject( wnd->hrgnUpdate );
 192                         wnd->hrgnUpdate = 0;
 193                         if(!(wnd->flags & WIN_INTERNAL_PAINT))
 194                             QUEUE_DecPaintCount( wnd->hmemTaskQ );
 195
 196                         wnd->flags &= ~WIN_NEEDS_ERASEBKGND;
 197                     }
 198                 }
 199
 200                 if(!hClip && wnd->hrgnUpdate ) goto copyrgn;
 201             }
 202             else
 203             if( wnd->hrgnUpdate == 1 )/* entire window */
 204             {
 205                 if( uncFlags & UNC_UPDATE ) wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 206                 if( uncFlags & UNC_REGION ) hrgnRet = 1;
 207                 uncFlags |= UNC_ENTIRE;
 208             }
 209     }
 210     else /* no WM_NCPAINT unless forced */
 211     {
 212         if( wnd->hrgnUpdate >  1 )
 213         {
 214 copyrgn:
 215             if( uncFlags & UNC_REGION )
 216                 hrgnRet = REGION_CropRgn( hRgn, wnd->hrgnUpdate, NULL, NULL );
 217         }
 218         else
 219         if( wnd->hrgnUpdate == 1 && (uncFlags & UNC_UPDATE) )
 220         {
 221             GETCLIENTRECTW( wnd, r );
 222             wnd->hrgnUpdate = CreateRectRgnIndirect( &r );
 223             if( uncFlags & UNC_REGION ) hrgnRet = 1;
 224         }
 225     }
 226
 227     if(!hClip && (uncFlags & UNC_ENTIRE) )
 228     {
 229         /* still don't do anything if there is no nonclient area */
 230         hClip = (memcmp( &wnd->rectWindow, &wnd->rectClient, sizeof(RECT) ) != 0);
 231     }
 232
 233     if( hClip ) /* NOTE: WM_NCPAINT allows wParam to be 1 */
 234     {
 235         if ( hClip == hrgnRet && hrgnRet > 1 ) {
 236             hClip = CreateRectRgn( 0, 0, 0, 0 );
 237             CombineRgn( hClip, hrgnRet, 0, RGN_COPY );
 238         }
 239
 240         SendMessageA( wnd->hwndSelf, WM_NCPAINT, hClip, 0L );
 241         if( (hClip > 1) && (hClip != hRgn) && (hClip != hrgnRet) )
 242             DeleteObject( hClip );
 243         /*
 244          * Since all Window locks are suspended while processing the WM_NCPAINT
 245          * we want to make sure the window still exists before continuing.
 246          */
 247         if (!IsWindow(wnd->hwndSelf))
 248         {
 249           DeleteObject(hrgnRet);
 250           hrgnRet=0;
 251         }
 252     }
 253
 254     TRACE_(nonclient)("returning %04x (hClip = %04x, hrgnUpdate = %04x)\n", hrgnRet, hClip, wnd->hrgnUpdate );
 255
 256     return hrgnRet;
 257 }
 258
 259
 260 /***********************************************************************
 261  *           BeginPaint16    (USER.39)
 262  */
 263 HDC16 WINAPI BeginPaint16( HWND16 hwnd, LPPAINTSTRUCT16 lps )
 264 {
 265     BOOL bIcon;
 266     HRGN hrgnUpdate;
 267     RECT16 clipRect, clientRect;
 268     WND *wndPtr = WIN_FindWndPtr( hwnd );
 269     if (!wndPtr) return 0;
 270
 271     bIcon = (wndPtr->dwStyle & WS_MINIMIZE && GetClassWord(wndPtr->hwndSelf, GCW_HICON));
 272
 273     wndPtr->flags &= ~WIN_NEEDS_BEGINPAINT;
 274
 275     /* send WM_NCPAINT and make sure hrgnUpdate is a valid rgn handle */
 276     WIN_UpdateNCRgn( wndPtr, 0, UNC_UPDATE | UNC_IN_BEGINPAINT);
 277
 278     /*
 279      * Make sure the window is still a window. All window locks are suspended
 280      * when the WM_NCPAINT is sent.
 281      */
 282     if (!IsWindow(wndPtr->hwndSelf))
 283     {
 284         WIN_ReleaseWndPtr(wndPtr);
 285         return 0;
 286     }
 287
 288     if( ((hrgnUpdate = wndPtr->hrgnUpdate) != 0) || (wndPtr->flags & WIN_INTERNAL_PAINT))
 289         QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 290
 291     wndPtr->hrgnUpdate = 0;
 292     wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 293
 294     HideCaret( hwnd );
 295
 296     TRACE_(win)("hrgnUpdate = %04x, \n", hrgnUpdate);
 297
 298     if (GetClassWord16(wndPtr->hwndSelf, GCW_STYLE) & CS_PARENTDC)
 299     {
 300         /* Don't clip the output to the update region for CS_PARENTDC window */
 301         if( hrgnUpdate )
 302             DeleteObject(hrgnUpdate);
 303         lps->hdc = GetDCEx16( hwnd, 0, DCX_WINDOWPAINT | DCX_USESTYLE |
 304                               (bIcon ? DCX_WINDOW : 0) );
 305     }
 306     else
 307     {
 308         if( hrgnUpdate ) /* convert to client coordinates */
 309             OffsetRgn( hrgnUpdate, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 310                                    wndPtr->rectWindow.top - wndPtr->rectClient.top );
 311         lps->hdc = GetDCEx16(hwnd, hrgnUpdate, DCX_INTERSECTRGN |
 312                              DCX_WINDOWPAINT | DCX_USESTYLE | (bIcon ? DCX_WINDOW : 0) );
 313         /* ReleaseDC() in EndPaint() will delete the region */
 314     }
 315
 316     TRACE_(win)("hdc = %04x\n", lps->hdc);
 317
 318     if (!lps->hdc)
 319     {
 320         WARN_(win)("GetDCEx() failed in BeginPaint(), hwnd=%04x\n", hwnd);
 321         WIN_ReleaseWndPtr(wndPtr);
 322         return 0;
 323     }
 324
 325     /* It is possible that the clip box is bigger than the window itself,
 326        if CS_PARENTDC flag is set. Windows never return a paint rect bigger
 327        than the window itself, so we need to intersect the cliprect with
 328        the window  */
 329
 330     GetClipBox16( lps->hdc, &clipRect );
 331     GetClientRect16( hwnd, &clientRect );
 332
 333     /* The rect obtained by GetClipBox is in logical, so make the client in logical to*/
 334     DPtoLP16(lps->hdc, (LPPOINT16) &clientRect, 2);
 335
 336     IntersectRect16(&lps->rcPaint, &clientRect, &clipRect);
 337
 338     TRACE_(win)("box = (%i,%i - %i,%i)\n", lps->rcPaint.left, lps->rcPaint.top,
 339                     lps->rcPaint.right, lps->rcPaint.bottom );
 340
 341     if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
 342     {
 343         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 344         lps->fErase = !SendMessage16(hwnd, (bIcon) ? WM_ICONERASEBKGND
 345                                                    : WM_ERASEBKGND,
 346                                      (WPARAM16)lps->hdc, 0 );
 347     }
 348     else lps->fErase = TRUE;
 349
 350     WIN_ReleaseWndPtr(wndPtr);
 351     return lps->hdc;
 352 }
 353
 354
 355 /***********************************************************************
 356  *           BeginPaint32    (USER32.10)
 357  */
 358 HDC WINAPI BeginPaint( HWND hwnd, PAINTSTRUCT *lps )
 359 {
 360     PAINTSTRUCT16 ps;
 361
 362     BeginPaint16( hwnd, &ps );
 363     lps->hdc            = (HDC)ps.hdc;
 364     lps->fErase         = ps.fErase;
 365     lps->rcPaint.top    = ps.rcPaint.top;
 366     lps->rcPaint.left   = ps.rcPaint.left;
 367     lps->rcPaint.right  = ps.rcPaint.right;
 368     lps->rcPaint.bottom = ps.rcPaint.bottom;
 369     lps->fRestore       = ps.fRestore;
 370     lps->fIncUpdate     = ps.fIncUpdate;
 371     return lps->hdc;
 372 }
 373
 374
 375 /***********************************************************************
 376  *           EndPaint16    (USER.40)
 377  */
 378 BOOL16 WINAPI EndPaint16( HWND16 hwnd, const PAINTSTRUCT16* lps )
 379 {
 380     ReleaseDC16( hwnd, lps->hdc );
 381     ShowCaret( hwnd );
 382     return TRUE;
 383 }
 384
 385
 386 /***********************************************************************
 387  *           EndPaint32    (USER32.176)
 388  */
 389 BOOL WINAPI EndPaint( HWND hwnd, const PAINTSTRUCT *lps )
 390 {
 391     ReleaseDC( hwnd, lps->hdc );
 392     ShowCaret( hwnd );
 393     return TRUE;
 394 }
 395
 396
 397 /***********************************************************************
 398  *           FillWindow    (USER.324)
 399  */
 400 void WINAPI FillWindow16( HWND16 hwndParent, HWND16 hwnd, HDC16 hdc, HBRUSH16 hbrush )
 401 {
 402     RECT16 rect;
 403     GetClientRect16( hwnd, &rect );
 404     DPtoLP16( hdc, (LPPOINT16)&rect, 2 );
 405     PaintRect16( hwndParent, hwnd, hdc, hbrush, &rect );
 406 }
 407
 408
 409 /***********************************************************************
 410  *           PAINT_GetControlBrush
 411  */
 412 static HBRUSH16 PAINT_GetControlBrush( HWND hParent, HWND hWnd, HDC16 hDC, UINT16 ctlType )
 413 {
 414     HBRUSH16 bkgBrush = (HBRUSH16)SendMessageA( hParent, WM_CTLCOLORMSGBOX + ctlType,
 415                                                              (WPARAM)hDC, (LPARAM)hWnd );
 416     if( !IsGDIObject16(bkgBrush) )
 417         bkgBrush = DEFWND_ControlColor( hDC, ctlType );
 418     return bkgBrush;
 419 }
 420
 421
 422 /***********************************************************************
 423  *           PaintRect    (USER.325)
 424  */
 425 void WINAPI PaintRect16( HWND16 hwndParent, HWND16 hwnd, HDC16 hdc,
 426                        HBRUSH16 hbrush, const RECT16 *rect)
 427 {
 428     if( hbrush <= CTLCOLOR_MAX )
 429     {
 430         if( hwndParent )
 431             hbrush = PAINT_GetControlBrush( hwndParent, hwnd, hdc, (UINT16)hbrush );
 432         else
 433             return;
 434     }
 435     if( hbrush )
 436         FillRect16( hdc, rect, hbrush );
 437 }
 438
 439
 440 /***********************************************************************
 441  *           GetControlBrush    (USER.326)
 442  */
 443 HBRUSH16 WINAPI GetControlBrush16( HWND16 hwnd, HDC16 hdc, UINT16 ctlType )
 444 {
 445     WND* wndPtr = WIN_FindWndPtr( hwnd );
 446     HBRUSH16 retvalue;
 447
 448     if((ctlType <= CTLCOLOR_MAX) && wndPtr )
 449     {
 450         WND* parent;
 451         if( wndPtr->dwStyle & WS_POPUP ) parent = WIN_LockWndPtr(wndPtr->owner);
 452         else parent = WIN_LockWndPtr(wndPtr->parent);
 453         if( !parent ) parent = wndPtr;
 454         retvalue = (HBRUSH16)PAINT_GetControlBrush( parent->hwndSelf, hwnd, hdc, ctlType );
 455         WIN_ReleaseWndPtr(parent);
 456         goto END;
 457     }
 458     retvalue = (HBRUSH16)0;
 459 END:
 460     WIN_ReleaseWndPtr(wndPtr);
 461     return retvalue;
 462 }
 463
 464
 465 /***********************************************************************
 466  *              RDW_ValidateParent [RDW_UpdateRgns() helper]
 467  *
 468  *  Validate the portions of parent that are covered by a validated child
 469  *  wndPtr = child
 470  */
 471 void  RDW_ValidateParent(WND *wndChild)
 472 {
 473     WND *wndParent = WIN_LockWndPtr(wndChild->parent);
 474     WND *wndDesktop = WIN_GetDesktop();
 475
 476     if ((wndParent) && (wndParent != wndDesktop) && !(wndParent->dwStyle & WS_CLIPCHILDREN))
 477     {
 478         HRGN hrg;
 479         if (wndChild->hrgnUpdate == 1 )
 480         {
 481             RECT r;
 482
 483             r.left = 0;
 484             r.top = 0;
 485             r.right = wndChild->rectWindow.right - wndChild->rectWindow.left;
 486             r.bottom = wndChild->rectWindow.bottom - wndChild->rectWindow.top;
 487
 488             hrg = CreateRectRgnIndirect( &r );
 489         }
 490         else
 491            hrg = wndChild->hrgnUpdate;
 492         if (wndParent->hrgnUpdate != 0)
 493         {
 494             POINT ptOffset;
 495             RECT rect, rectParent;
 496             if( wndParent->hrgnUpdate == 1 )
 497             {
 498                RECT r;
 499
 500                r.left = 0;
 501                r.top = 0;
 502                r.right = wndParent->rectWindow.right - wndParent->rectWindow.left;
 503                r.bottom = wndParent->rectWindow.bottom - wndParent->rectWindow.top;
 504
 505                wndParent->hrgnUpdate = CreateRectRgnIndirect( &r );
 506             }
 507             /* we must offset the child region by the offset of the child rect in the parent */
 508             GetWindowRect(wndParent->hwndSelf, &rectParent);
 509             GetWindowRect(wndChild->hwndSelf, &rect);
 510             ptOffset.x = rect.left - rectParent.left;
 511             ptOffset.y = rect.top - rectParent.top;
 512             OffsetRgn( hrg, ptOffset.x, ptOffset.y );
 513             CombineRgn( wndParent->hrgnUpdate, wndParent->hrgnUpdate, hrg, RGN_DIFF );
 514             OffsetRgn( hrg, -ptOffset.x, -ptOffset.y );
 515         }
 516         if (hrg != wndChild->hrgnUpdate) DeleteObject( hrg );
 517     }
 518     WIN_ReleaseWndPtr(wndParent);
 519     WIN_ReleaseDesktop();
 520 }
 521
 522 /***********************************************************************
 523  *              RDW_UpdateRgns [RedrawWindow() helper]
 524  *
 525  *  Walks the window tree and adds/removes parts of the hRgn to/from update
 526  *  regions of windows that overlap it. Also, manages internal paint flags.
 527  *
 528  *  NOTE: Walks the window tree so the caller must lock it.
 529  *        MUST preserve hRgn (can modify but then has to restore).
 530  */
 531 static void RDW_UpdateRgns( WND* wndPtr, HRGN hRgn, UINT flags, BOOL firstRecursLevel )
 532 {
 533     /*
 534      * Called only when one of the following is set:
 535      * (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT)
 536      */
 537
 538     BOOL bHadOne =  wndPtr->hrgnUpdate && hRgn;
 539     BOOL bChildren =  ( wndPtr->child && !(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE)
 540                         && ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) );
 541     RECT r;
 542
 543     r.left = 0;
 544     r.top = 0;
 545     r.right = wndPtr->rectWindow.right - wndPtr->rectWindow.left;
 546     r.bottom = wndPtr->rectWindow.bottom - wndPtr->rectWindow.top;
 547
 548     TRACE_(win)("\thwnd %04x [%04x] -> hrgn [%04x], flags [%04x]\n", wndPtr->hwndSelf, wndPtr->hrgnUpdate, hRgn, flags );
 549
 550     if( flags & RDW_INVALIDATE )
 551     {
 552         if( hRgn > 1 )
 553         {
 554             switch( wndPtr->hrgnUpdate )
 555             {
 556                 default:
 557                         CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_OR );
 558                         /* fall through */
 559                 case 0:
 560                         wndPtr->hrgnUpdate = REGION_CropRgn( wndPtr->hrgnUpdate,
 561                                                              wndPtr->hrgnUpdate ? wndPtr->hrgnUpdate : hRgn,
 562                                                              &r, NULL );
 563                         if( !bHadOne )
 564                         {
 565                             GetRgnBox( wndPtr->hrgnUpdate, &r );
 566                             if( IsRectEmpty( &r ) )
 567                             {
 568                                 DeleteObject( wndPtr->hrgnUpdate );
 569                                 wndPtr->hrgnUpdate = 0;
 570                                 goto OUT;
 571                             }
 572                         }
 573                         break;
 574                 case 1: /* already an entire window */
 575                         break;
 576             }
 577         }
 578         else if( hRgn == 1 )
 579         {
 580             if( wndPtr->hrgnUpdate > 1 )
 581                 DeleteObject( wndPtr->hrgnUpdate );
 582             wndPtr->hrgnUpdate = 1;
 583         }
 584         else
 585             hRgn = wndPtr->hrgnUpdate;  /* this is a trick that depends on code in PAINT_RedrawWindow() */
 586
 587         if( !bHadOne && !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 588             QUEUE_IncPaintCount( wndPtr->hmemTaskQ );
 589
 590         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 591         if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 592         flags    |= RDW_FRAME;
 593     }
 594     else if( flags & RDW_VALIDATE )
 595     {
 596         if( wndPtr->hrgnUpdate )
 597         {
 598             if( hRgn > 1 )
 599             {
 600                 if( wndPtr->hrgnUpdate == 1 )
 601                     wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r );
 602
 603                 if( CombineRgn( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate, hRgn, RGN_DIFF )
 604                     == NULLREGION )
 605                     goto EMPTY;
 606             }
 607             else /* validate everything */
 608             {
 609                 if( wndPtr->hrgnUpdate > 1 )
 610                 {
 611 EMPTY:
 612                     DeleteObject( wndPtr->hrgnUpdate );
 613                 }
 614                 wndPtr->hrgnUpdate = 0;
 615             }
 616
 617             if( !wndPtr->hrgnUpdate )
 618             {
 619                 wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 620                 if( !(wndPtr->flags & WIN_INTERNAL_PAINT) )
 621                     QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 622             }
 623         }
 624
 625         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 626         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 627
 628     }
 629
 630     if ((firstRecursLevel) && (wndPtr->hrgnUpdate != 0) && (flags & RDW_UPDATENOW))
 631         RDW_ValidateParent(wndPtr); /* validate parent covered by region */
 632
 633     /* in/validate child windows that intersect with the region if it
 634      * is a valid handle. */
 635
 636     if( flags & (RDW_INVALIDATE | RDW_VALIDATE) )
 637     {
 638         if( hRgn > 1 && bChildren )
 639         {
 640             WND* wnd = wndPtr->child;
 641             POINT ptTotal, prevOrigin = {0,0};
 642             POINT ptClient;
 643
 644             ptClient.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 645             ptClient.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 646
 647             for( ptTotal.x = ptTotal.y = 0; wnd; wnd = wnd->next )
 648             {
 649                 if( wnd->dwStyle & WS_VISIBLE )
 650                 {
 651                     POINT ptOffset;
 652
 653                     r.left = wnd->rectWindow.left + ptClient.x;
 654                     r.right = wnd->rectWindow.right + ptClient.x;
 655                     r.top = wnd->rectWindow.top + ptClient.y;
 656                     r.bottom = wnd->rectWindow.bottom + ptClient.y;
 657
 658                     ptOffset.x = r.left - prevOrigin.x;
 659                     ptOffset.y = r.top - prevOrigin.y;
 660                     OffsetRect( &r, -ptTotal.x, -ptTotal.y );
 661
 662                     if( RectInRegion( hRgn, &r ) )
 663                     {
 664                         OffsetRgn( hRgn, -ptOffset.x, -ptOffset.y );
 665                         RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 666                         prevOrigin.x = r.left + ptTotal.x;
 667                         prevOrigin.y = r.top + ptTotal.y;
 668                         ptTotal.x += ptOffset.x;
 669                         ptTotal.y += ptOffset.y;
 670                     }
 671                 }
 672             }
 673             OffsetRgn( hRgn, ptTotal.x, ptTotal.y );
 674             bChildren = 0;
 675         }
 676     }
 677
 678     /* handle hRgn == 1 (alias for entire window) and/or internal paint recursion */
 679
 680     if( bChildren )
 681     {
 682         WND* wnd;
 683         for( wnd = wndPtr->child; wnd; wnd = wnd->next )
 684              if( wnd->dwStyle & WS_VISIBLE )
 685                  RDW_UpdateRgns( wnd, hRgn, flags, FALSE );
 686     }
 687
 688 OUT:
 689
 690     /* Set/clear internal paint flag */
 691
 692     if (flags & RDW_INTERNALPAINT)
 693     {
 694         if ( !wndPtr->hrgnUpdate && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 695             QUEUE_IncPaintCount( wndPtr->hmemTaskQ );
 696         wndPtr->flags |= WIN_INTERNAL_PAINT;
 697     }
 698     else if (flags & RDW_NOINTERNALPAINT)
 699     {
 700         if ( !wndPtr->hrgnUpdate && (wndPtr->flags & WIN_INTERNAL_PAINT))
 701             QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 702         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 703     }
 704 }
 705
 706 /***********************************************************************
 707  *           RDW_Paint [RedrawWindow() helper]
 708  *
 709  * Walks the window tree and paints/erases windows that have
 710  * nonzero update regions according to redraw flags. hrgn is a scratch
 711  * region passed down during recursion. Must not be 1.
 712  *
 713  */
 714 static HRGN RDW_Paint( WND* wndPtr, HRGN hrgn, UINT flags, UINT ex )
 715 {
 716 /* NOTE: wndPtr is locked by caller.
 717  *
 718  * FIXME: Windows uses WM_SYNCPAINT to cut down the number of intertask
 719  * SendMessage() calls. This is a comment inside DefWindowProc() source
 720  * from 16-bit SDK:
 721  *
 722  *   This message avoids lots of inter-app message traffic
 723  *   by switching to the other task and continuing the
 724  *   recursion there.
 725  *
 726  * wParam         = flags
 727  * LOWORD(lParam) = hrgnClip
 728  * HIWORD(lParam) = hwndSkip  (not used; always NULL)
 729  *
 730  */
 731     HDC  hDC;
 732     HWND hWnd = wndPtr->hwndSelf;
 733     BOOL bIcon = ((wndPtr->dwStyle & WS_MINIMIZE) && GetClassWord(wndPtr->hwndSelf, GCW_HICON));
 734
 735       /* Erase/update the window itself ... */
 736
 737     TRACE_(win)("\thwnd %04x [%04x] -> hrgn [%04x], flags [%04x]\n", hWnd, wndPtr->hrgnUpdate, hrgn, flags );
 738
 739     /*
 740      * Check if this window should delay it's processing of WM_NCPAINT.
 741      * See WIN_HaveToDelayNCPAINT for a description of the mechanism
 742      */
 743     if ((ex & RDW_EX_DELAY_NCPAINT) || WIN_HaveToDelayNCPAINT(wndPtr, 0) )
 744         ex |= RDW_EX_DELAY_NCPAINT;
 745
 746     if (flags & RDW_UPDATENOW)
 747     {
 748         if (wndPtr->hrgnUpdate) /* wm_painticon wparam is 1 */
 749             SendMessage16( hWnd, (bIcon) ? WM_PAINTICON : WM_PAINT, bIcon, 0 );
 750     }
 751     else if ((flags & RDW_ERASENOW) || (ex & RDW_EX_TOPFRAME))
 752     {
 753         UINT dcx = DCX_INTERSECTRGN | DCX_USESTYLE | DCX_KEEPCLIPRGN | DCX_WINDOWPAINT | DCX_CACHE;
 754         HRGN hrgnRet;
 755
 756         hrgnRet = WIN_UpdateNCRgn(wndPtr,
 757                                   hrgn,
 758                                   UNC_REGION | UNC_CHECK |
 759                                   ((ex & RDW_EX_TOPFRAME) ? UNC_ENTIRE : 0) |
 760                                   ((ex & RDW_EX_DELAY_NCPAINT) ? UNC_DELAY_NCPAINT : 0) );
 761
 762         if( hrgnRet )
 763         {
 764             if( hrgnRet > 1 ) hrgn = hrgnRet; else hrgnRet = 0; /* entire client */
 765             if( wndPtr->flags & WIN_NEEDS_ERASEBKGND )
 766             {
 767                 if( bIcon ) dcx |= DCX_WINDOW;
 768                 else
 769                 if( hrgnRet )
 770                     OffsetRgn( hrgnRet, wndPtr->rectWindow.left - wndPtr->rectClient.left,
 771                                         wndPtr->rectWindow.top  - wndPtr->rectClient.top);
 772                 else
 773                     dcx &= ~DCX_INTERSECTRGN;
 774                 if (( hDC = GetDCEx( hWnd, hrgnRet, dcx )) )
 775                 {
 776                     if (SendMessage16( hWnd, (bIcon) ? WM_ICONERASEBKGND
 777                                        : WM_ERASEBKGND, (WPARAM16)hDC, 0 ))
 778                     wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 779                     ReleaseDC( hWnd, hDC );
 780                 }
 781             }
 782         }
 783     }
 784
 785     if( !IsWindow(hWnd) ) return hrgn;
 786     ex &= ~RDW_EX_TOPFRAME;
 787
 788       /* ... and its child windows */
 789
 790     if( wndPtr->child && !(flags & RDW_NOCHILDREN) && !(wndPtr->dwStyle & WS_MINIMIZE)
 791         && ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) )
 792     {
 793         WND** list, **ppWnd;
 794
 795         if( (list = WIN_BuildWinArray( wndPtr, 0, NULL )) )
 796         {
 797             wndPtr = NULL;
 798             for (ppWnd = list; *ppWnd; ppWnd++)
 799             {
 800                 WIN_UpdateWndPtr(&wndPtr,*ppWnd);
 801                 if (!IsWindow(wndPtr->hwndSelf)) continue;
 802                     if ( (wndPtr->dwStyle & WS_VISIBLE) &&
 803                          (wndPtr->hrgnUpdate || (wndPtr->flags & WIN_INTERNAL_PAINT)) )
 804                         hrgn = RDW_Paint( wndPtr, hrgn, flags, ex );
 805             }
 806             WIN_ReleaseWndPtr(wndPtr);
 807             WIN_ReleaseWinArray(list);
 808         }
 809     }
 810
 811     return hrgn;
 812 }
 813
 814 /***********************************************************************
 815  *           PAINT_RedrawWindow
 816  *
 817  */
 818 BOOL PAINT_RedrawWindow( HWND hwnd, const RECT *rectUpdate,
 819                            HRGN hrgnUpdate, UINT flags, UINT ex )
 820 {
 821     HRGN hRgn = 0;
 822     RECT r, r2;
 823     POINT pt;
 824     WND* wndPtr;
 825
 826     if (!hwnd) hwnd = GetDesktopWindow();
 827     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 828
 829     /* check if the window or its parents are visible/not minimized */
 830
 831     if (!WIN_IsWindowDrawable( wndPtr, !(flags & RDW_FRAME) ) )
 832     {
 833         WIN_ReleaseWndPtr(wndPtr);
 834         return TRUE;
 835     }
 836
 837     if (TRACE_ON(win))
 838     {
 839         if( hrgnUpdate )
 840         {
 841             GetRgnBox( hrgnUpdate, &r );
 842             TRACE_(win)( "%04x (%04x) NULL %04x box (%i,%i-%i,%i) flags=%04x, exflags=%04x\n",
 843                   hwnd, wndPtr->hrgnUpdate, hrgnUpdate, r.left, r.top, r.right, r.bottom, flags, ex);
 844         }
 845         else
 846         {
 847             if( rectUpdate )
 848                 r = *rectUpdate;
 849             else
 850                 SetRectEmpty( &r );
 851             TRACE_(win)( "%04x (%04x) %s %d,%d-%d,%d %04x flags=%04x, exflags=%04x\n",
 852                         hwnd, wndPtr->hrgnUpdate, rectUpdate ? "rect" : "NULL", r.left,
 853                         r.top, r.right, r.bottom, hrgnUpdate, flags, ex );
 854         }
 855     }
 856
 857     /* prepare an update region in window coordinates */
 858
 859     if( flags & RDW_FRAME )
 860         r = wndPtr->rectWindow;
 861     else
 862         r = wndPtr->rectClient;
 863
 864     if( ex & RDW_EX_XYWINDOW )
 865     {
 866         pt.x = pt.y = 0;
 867         OffsetRect( &r, -wndPtr->rectWindow.left, -wndPtr->rectWindow.top );
 868     }
 869     else
 870     {
 871         pt.x = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 872         pt.y = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 873         OffsetRect( &r, -wndPtr->rectClient.left, -wndPtr->rectClient.top );
 874     }
 875
 876     if (flags & RDW_INVALIDATE)  /* ------------------------- Invalidate */
 877     {
 878         /* If the window doesn't have hrgnUpdate we leave hRgn zero
 879          * and put a new region straight into wndPtr->hrgnUpdate
 880          * so that RDW_UpdateRgns() won't have to do any extra work.
 881          */
 882
 883         if( hrgnUpdate )
 884         {
 885             if( wndPtr->hrgnUpdate )
 886                 hRgn = REGION_CropRgn( 0, hrgnUpdate, NULL, &pt );
 887             else
 888                 wndPtr->hrgnUpdate = REGION_CropRgn( 0, hrgnUpdate, &r, &pt );
 889         }
 890         else if( rectUpdate )
 891         {
 892             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 893             OffsetRect( &r2, pt.x, pt.y );
 894
 895 rect2i:
 896             if( wndPtr->hrgnUpdate == 0 )
 897                 wndPtr->hrgnUpdate = CreateRectRgnIndirect( &r2 );
 898             else
 899                 hRgn = CreateRectRgnIndirect( &r2 );
 900         }
 901         else /* entire window or client depending on RDW_FRAME */
 902         {
 903             if( flags & RDW_FRAME )
 904             {
 905                 if( wndPtr->hrgnUpdate )
 906                     DeleteObject( wndPtr->hrgnUpdate );
 907                 wndPtr->hrgnUpdate = 1;
 908             }
 909             else
 910             {
 911                 GETCLIENTRECTW( wndPtr, r2 );
 912                 goto rect2i;
 913             }
 914         }
 915     }
 916     else if (flags & RDW_VALIDATE)  /* ------------------------- Validate */
 917     {
 918         /* In this we cannot leave with zero hRgn */
 919         if( hrgnUpdate )
 920         {
 921             hRgn = REGION_CropRgn( hRgn, hrgnUpdate,  &r, &pt );
 922             GetRgnBox( hRgn, &r2 );
 923             if( IsRectEmpty( &r2 ) ) goto END;
 924         }
 925         else if( rectUpdate )
 926         {
 927             if( !IntersectRect( &r2, &r, rectUpdate ) ) goto END;
 928                 OffsetRect( &r2, pt.x, pt.y );
 929 rect2v:
 930             hRgn = CreateRectRgnIndirect( &r2 );
 931         }
 932         else /* entire window or client depending on RDW_FRAME */
 933         {
 934             if( flags & RDW_FRAME )
 935                 hRgn = 1;
 936             else
 937             {
 938                 GETCLIENTRECTW( wndPtr, r2 );
 939                 goto rect2v;
 940             }
 941         }
 942     }
 943
 944     /* At this point hRgn is either an update region in window coordinates or 1 or 0 */
 945
 946     RDW_UpdateRgns( wndPtr, hRgn, flags, TRUE );
 947
 948     /* Erase/update windows, from now on hRgn is a scratch region */
 949
 950     hRgn = RDW_Paint( wndPtr, (hRgn == 1) ? 0 : hRgn, flags, ex );
 951
 952 END:
 953     if( hRgn > 1 && (hRgn != hrgnUpdate) )
 954         DeleteObject(hRgn );
 955     WIN_ReleaseWndPtr(wndPtr);
 956     return TRUE;
 957 }
 958
 959
 960 /***********************************************************************
 961  *           RedrawWindow32    (USER32.426)
 962  */
 963 BOOL WINAPI RedrawWindow( HWND hwnd, const RECT *rectUpdate,
 964                               HRGN hrgnUpdate, UINT flags )
 965 {
 966     return PAINT_RedrawWindow( hwnd, rectUpdate, hrgnUpdate, flags, 0 );
 967 }
 968
 969
 970 /***********************************************************************
 971  *           RedrawWindow16    (USER.290)
 972  */
 973 BOOL16 WINAPI RedrawWindow16( HWND16 hwnd, const RECT16 *rectUpdate,
 974                               HRGN16 hrgnUpdate, UINT16 flags )
 975 {
 976     if (rectUpdate)
 977     {
 978         RECT r;
 979         CONV_RECT16TO32( rectUpdate, &r );
 980         return (BOOL16)RedrawWindow( (HWND)hwnd, &r, hrgnUpdate, flags );
 981     }
 982     return (BOOL16)PAINT_RedrawWindow( (HWND)hwnd, NULL,
 983                                        (HRGN)hrgnUpdate, flags, 0 );
 984 }
 985
 986
 987 /***********************************************************************
 988  *           UpdateWindow16   (USER.124)
 989  */
 990 void WINAPI UpdateWindow16( HWND16 hwnd )
 991 {
 992     PAINT_RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_NOCHILDREN, 0 );
 993 }
 994
 995 /***********************************************************************
 996  *           UpdateWindow32   (USER32.567)
 997  */
 998 void WINAPI UpdateWindow( HWND hwnd )
 999 {
1000     PAINT_RedrawWindow( hwnd, NULL, 0, RDW_UPDATENOW | RDW_NOCHILDREN, 0 );
1001 }
1002
1003 /***********************************************************************
1004  *           InvalidateRgn16   (USER.126)
1005  */
1006 void WINAPI InvalidateRgn16( HWND16 hwnd, HRGN16 hrgn, BOOL16 erase )
1007 {
1008     PAINT_RedrawWindow((HWND)hwnd, NULL, (HRGN)hrgn,
1009                        RDW_INVALIDATE | (erase ? RDW_ERASE : 0), 0 );
1010 }
1011
1012
1013 /***********************************************************************
1014  *           InvalidateRgn32   (USER32.329)
1015  */
1016 BOOL WINAPI InvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
1017 {
1018     return PAINT_RedrawWindow(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0), 0 );
1019 }
1020
1021
1022 /***********************************************************************
1023  *           InvalidateRect16   (USER.125)
1024  */
1025 void WINAPI InvalidateRect16( HWND16 hwnd, const RECT16 *rect, BOOL16 erase )
1026 {
1027     RedrawWindow16( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
1028 }
1029
1030
1031 /***********************************************************************
1032  *           InvalidateRect32   (USER32.328)
1033  */
1034 BOOL WINAPI InvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
1035 {
1036     return PAINT_RedrawWindow( hwnd, rect, 0,
1037                                RDW_INVALIDATE | (erase ? RDW_ERASE : 0), 0 );
1038 }
1039
1040
1041 /***********************************************************************
1042  *           ValidateRgn16   (USER.128)
1043  */
1044 void WINAPI ValidateRgn16( HWND16 hwnd, HRGN16 hrgn )
1045 {
1046     PAINT_RedrawWindow( (HWND)hwnd, NULL, (HRGN)hrgn,
1047                         RDW_VALIDATE | RDW_NOCHILDREN, 0 );
1048 }
1049
1050
1051 /***********************************************************************
1052  *           ValidateRgn32   (USER32.572)
1053  */
1054 void WINAPI ValidateRgn( HWND hwnd, HRGN hrgn )
1055 {
1056     PAINT_RedrawWindow( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN, 0 );
1057 }
1058
1059
1060 /***********************************************************************
1061  *           ValidateRect16   (USER.127)
1062  */
1063 void WINAPI ValidateRect16( HWND16 hwnd, const RECT16 *rect )
1064 {
1065     RedrawWindow16( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
1066 }
1067
1068
1069 /***********************************************************************
1070  *           ValidateRect32   (USER32.571)
1071  */
1072 void WINAPI ValidateRect( HWND hwnd, const RECT *rect )
1073 {
1074     PAINT_RedrawWindow( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN, 0 );
1075 }
1076
1077
1078 /***********************************************************************
1079  *           GetUpdateRect16   (USER.190)
1080  */
1081 BOOL16 WINAPI GetUpdateRect16( HWND16 hwnd, LPRECT16 rect, BOOL16 erase )
1082 {
1083     RECT r;
1084     BOOL16 ret;
1085
1086     if (!rect) return GetUpdateRect( hwnd, NULL, erase );
1087     ret = GetUpdateRect( hwnd, &r, erase );
1088     CONV_RECT32TO16( &r, rect );
1089     return ret;
1090 }
1091
1092
1093 /***********************************************************************
1094  *           GetUpdateRect32   (USER32.297)
1095  */
1096 BOOL WINAPI GetUpdateRect( HWND hwnd, LPRECT rect, BOOL erase )
1097 {
1098     BOOL retvalue;
1099     WND * wndPtr = WIN_FindWndPtr( hwnd );
1100     if (!wndPtr) return FALSE;
1101
1102     if (rect)
1103     {
1104         if (wndPtr->hrgnUpdate > 1)
1105         {
1106             HRGN hrgn = CreateRectRgn( 0, 0, 0, 0 );
1107             if (GetUpdateRgn( hwnd, hrgn, erase ) == ERROR)
1108             {
1109                 retvalue = FALSE;
1110                 goto END;
1111             }
1112             GetRgnBox( hrgn, rect );
1113             DeleteObject( hrgn );
1114             if (GetClassLongA(wndPtr->hwndSelf, GCL_STYLE) & CS_OWNDC)
1115             {
1116                 if (GetMapMode(wndPtr->dce->hDC) != MM_TEXT)
1117                 {
1118                     DPtoLP (wndPtr->dce->hDC, (LPPOINT)rect,  2);
1119                 }
1120             }
1121         }
1122         else
1123         if( wndPtr->hrgnUpdate == 1 )
1124         {
1125             GetClientRect( hwnd, rect );
1126             if (erase) RedrawWindow( hwnd, NULL, 0, RDW_FRAME | RDW_ERASENOW | RDW_NOCHILDREN );
1127         }
1128         else
1129             SetRectEmpty( rect );
1130     }
1131     retvalue = (wndPtr->hrgnUpdate >= 1);
1132 END:
1133     WIN_ReleaseWndPtr(wndPtr);
1134     return retvalue;
1135 }
1136
1137
1138 /***********************************************************************
1139  *           GetUpdateRgn16   (USER.237)
1140  */
1141 INT16 WINAPI GetUpdateRgn16( HWND16 hwnd, HRGN16 hrgn, BOOL16 erase )
1142 {
1143     return GetUpdateRgn( hwnd, hrgn, erase );
1144 }
1145
1146
1147 /***********************************************************************
1148  *           GetUpdateRgn    (USER32.298)
1149  */
1150 INT WINAPI GetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
1151 {
1152     INT retval;
1153     WND * wndPtr = WIN_FindWndPtr( hwnd );
1154     if (!wndPtr) return ERROR;
1155
1156     if (wndPtr->hrgnUpdate == 0)
1157     {
1158         SetRectRgn( hrgn, 0, 0, 0, 0 );
1159         retval = NULLREGION;
1160         goto END;
1161     }
1162     else
1163     if (wndPtr->hrgnUpdate == 1)
1164     {
1165         SetRectRgn( hrgn, 0, 0, wndPtr->rectClient.right - wndPtr->rectClient.left,
1166                                 wndPtr->rectClient.bottom - wndPtr->rectClient.top );
1167         retval = SIMPLEREGION;
1168     }
1169     else
1170     {
1171         retval = CombineRgn( hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY );
1172         OffsetRgn( hrgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
1173                          wndPtr->rectWindow.top - wndPtr->rectClient.top );
1174     }
1175     if (erase) RedrawWindow( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
1176 END:
1177     WIN_ReleaseWndPtr(wndPtr);
1178     return retval;
1179 }
1180
1181
1182 /***********************************************************************
1183  *           ExcludeUpdateRgn16   (USER.238)
1184  */
1185 INT16 WINAPI ExcludeUpdateRgn16( HDC16 hdc, HWND16 hwnd )
1186 {
1187     return ExcludeUpdateRgn( hdc, hwnd );
1188 }
1189
1190
1191 /***********************************************************************
1192  *           ExcludeUpdateRgn32   (USER32.195)
1193  */
1194 INT WINAPI ExcludeUpdateRgn( HDC hdc, HWND hwnd )
1195 {
1196     RECT rect;
1197     WND * wndPtr;
1198
1199     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return ERROR;
1200
1201     if (wndPtr->hrgnUpdate)
1202     {
1203         INT ret;
1204         HRGN hrgn = CreateRectRgn(wndPtr->rectWindow.left - wndPtr->rectClient.left,
1205                                       wndPtr->rectWindow.top - wndPtr->rectClient.top,
1206                                       wndPtr->rectWindow.right - wndPtr->rectClient.left,
1207                                       wndPtr->rectWindow.bottom - wndPtr->rectClient.top);
1208         if( wndPtr->hrgnUpdate > 1 )
1209         {
1210             CombineRgn(hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY);
1211             OffsetRgn(hrgn, wndPtr->rectWindow.left - wndPtr->rectClient.left,
1212                             wndPtr->rectWindow.top - wndPtr->rectClient.top );
1213         }
1214
1215         /* do ugly coordinate translations in dce.c */
1216
1217         ret = DCE_ExcludeRgn( hdc, wndPtr, hrgn );
1218         DeleteObject( hrgn );
1219         WIN_ReleaseWndPtr(wndPtr);
1220         return ret;
1221     }
1222     WIN_ReleaseWndPtr(wndPtr);
1223     return GetClipBox( hdc, &rect );
1224 }
1225
1226