git.oblomov.eu Git - wine/blob - windows/painting.c

   1 /*
   2  * Window painting functions
   3  *
   4  * Copyright 1993, 1994, 1995 Alexandre Julliard
   5  */
   6
   7 #include <stdio.h>
   8 #include <X11/Xlib.h>
   9
  10 #include "win.h"
  11 #include "queue.h"
  12 #include "gdi.h"
  13 #include "dce.h"
  14 #include "heap.h"
  15 #include "stddebug.h"
  16 /* #define DEBUG_WIN */
  17 #include "debug.h"
  18
  19   /* Last CTLCOLOR id */
  20 #define CTLCOLOR_MAX   CTLCOLOR_STATIC
  21
  22 /***********************************************************************
  23  *           WIN_UpdateNCArea
  24  *
  25  */
  26 void WIN_UpdateNCArea(WND* wnd, BOOL bUpdate)
  27 {
  28     POINT16 pt = {0, 0};
  29     HRGN32 hClip = 1;
  30
  31     dprintf_nonclient(stddeb,"NCUpdate: hwnd %04x, hrgnUpdate %04x\n",
  32                       wnd->hwndSelf, wnd->hrgnUpdate );
  33
  34     /* desktop window doesn't have nonclient area */
  35     if(wnd == WIN_GetDesktop())
  36     {
  37         wnd->flags &= ~WIN_NEEDS_NCPAINT;
  38         return;
  39     }
  40
  41     if( wnd->hrgnUpdate > 1 )
  42     {
  43         ClientToScreen16(wnd->hwndSelf, &pt);
  44
  45         hClip = CreateRectRgn32( 0, 0, 0, 0 );
  46         if (!CombineRgn32( hClip, wnd->hrgnUpdate, 0, RGN_COPY ))
  47         {
  48             DeleteObject32(hClip);
  49             hClip = 1;
  50         }
  51         else
  52             OffsetRgn32( hClip, pt.x, pt.y );
  53
  54         if (bUpdate)
  55         {
  56             /* exclude non-client area from update region */
  57             HRGN32 hrgn = CreateRectRgn32( 0, 0,
  58                                  wnd->rectClient.right - wnd->rectClient.left,
  59                                  wnd->rectClient.bottom - wnd->rectClient.top);
  60
  61             if (hrgn && (CombineRgn32( wnd->hrgnUpdate, wnd->hrgnUpdate,
  62                                        hrgn, RGN_AND) == NULLREGION))
  63             {
  64                 DeleteObject32( wnd->hrgnUpdate );
  65                 wnd->hrgnUpdate = 1;
  66             }
  67
  68             DeleteObject32( hrgn );
  69         }
  70     }
  71
  72     wnd->flags &= ~WIN_NEEDS_NCPAINT;
  73
  74     if ((wnd->hwndSelf == GetActiveWindow()) &&
  75         !(wnd->flags & WIN_NCACTIVATED))
  76     {
  77         wnd->flags |= WIN_NCACTIVATED;
  78         if( hClip > 1) DeleteObject32( hClip );
  79         hClip = 1;
  80     }
  81
  82     if (hClip) SendMessage16( wnd->hwndSelf, WM_NCPAINT, hClip, 0L );
  83
  84     if (hClip > 1) DeleteObject32( hClip );
  85 }
  86
  87
  88 /***********************************************************************
  89  *           BeginPaint16    (USER.39)
  90  */
  91 HDC16 BeginPaint16( HWND16 hwnd, LPPAINTSTRUCT16 lps )
  92 {
  93     BOOL32 bIcon;
  94     HRGN32 hrgnUpdate;
  95     WND *wndPtr = WIN_FindWndPtr( hwnd );
  96     if (!wndPtr) return 0;
  97
  98     bIcon = (wndPtr->dwStyle & WS_MINIMIZE && wndPtr->class->hIcon);
  99
 100     wndPtr->flags &= ~WIN_NEEDS_BEGINPAINT;
 101
 102     if (wndPtr->flags & WIN_NEEDS_NCPAINT) WIN_UpdateNCArea( wndPtr, TRUE );
 103
 104     if (((hrgnUpdate = wndPtr->hrgnUpdate) != 0) ||
 105         (wndPtr->flags & WIN_INTERNAL_PAINT))
 106         QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 107
 108     wndPtr->hrgnUpdate = 0;
 109     wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 110
 111     HideCaret( hwnd );
 112
 113     dprintf_win(stddeb,"hrgnUpdate = %04x, ", hrgnUpdate);
 114
 115     /* When bIcon is TRUE hrgnUpdate is automatically in window coordinates
 116      * (because rectClient == rectWindow for WS_MINIMIZE windows).
 117      */
 118
 119     if (wndPtr->class->style & CS_PARENTDC)
 120         /* Don't clip the output to the update region for CS_PARENTDC window */
 121         lps->hdc = GetDCEx16( hwnd, 0, DCX_WINDOWPAINT | DCX_USESTYLE |
 122                               (bIcon ? DCX_WINDOW : 0) );
 123     else
 124         lps->hdc = GetDCEx16(hwnd, hrgnUpdate, DCX_INTERSECTRGN |
 125                              DCX_WINDOWPAINT | DCX_USESTYLE |
 126                              (bIcon ? DCX_WINDOW : 0) );
 127
 128     dprintf_win(stddeb,"hdc = %04x\n", lps->hdc);
 129
 130     if (!lps->hdc)
 131     {
 132         fprintf(stderr, "GetDCEx() failed in BeginPaint(), hwnd=%04x\n", hwnd);
 133         return 0;
 134     }
 135
 136     GetRgnBox16( InquireVisRgn(lps->hdc), &lps->rcPaint );
 137     DPtoLP16( lps->hdc, (LPPOINT16)&lps->rcPaint, 2 );
 138
 139     if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
 140     {
 141         wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 142         lps->fErase = !SendMessage16(hwnd, (bIcon) ? WM_ICONERASEBKGND
 143                                                    : WM_ERASEBKGND,
 144                                      (WPARAM16)lps->hdc, 0 );
 145     }
 146     else lps->fErase = TRUE;
 147
 148     return lps->hdc;
 149 }
 150
 151
 152 /***********************************************************************
 153  *           BeginPaint32    (USER32.9)
 154  */
 155 HDC32 BeginPaint32( HWND32 hwnd, PAINTSTRUCT32 *lps )
 156 {
 157     PAINTSTRUCT16 ps;
 158
 159     BeginPaint16( hwnd, &ps );
 160     lps->hdc            = (HDC32)ps.hdc;
 161     lps->fErase         = ps.fErase;
 162     lps->rcPaint.top    = ps.rcPaint.top;
 163     lps->rcPaint.left   = ps.rcPaint.left;
 164     lps->rcPaint.right  = ps.rcPaint.right;
 165     lps->rcPaint.bottom = ps.rcPaint.bottom;
 166     lps->fRestore       = ps.fRestore;
 167     lps->fIncUpdate     = ps.fIncUpdate;
 168     return lps->hdc;
 169 }
 170
 171
 172 /***********************************************************************
 173  *           EndPaint16    (USER.40)
 174  */
 175 BOOL16 EndPaint16( HWND16 hwnd, const PAINTSTRUCT16* lps )
 176 {
 177     ReleaseDC16( hwnd, lps->hdc );
 178     ShowCaret( hwnd );
 179     return TRUE;
 180 }
 181
 182
 183 /***********************************************************************
 184  *           EndPaint32    (USER32.175)
 185  */
 186 BOOL32 EndPaint32( HWND32 hwnd, const PAINTSTRUCT32 *lps )
 187 {
 188     ReleaseDC32( hwnd, lps->hdc );
 189     ShowCaret( hwnd );
 190     return TRUE;
 191 }
 192
 193
 194 /***********************************************************************
 195  *           FillWindow    (USER.324)
 196  */
 197 void FillWindow( HWND16 hwndParent, HWND16 hwnd, HDC16 hdc, HBRUSH16 hbrush )
 198 {
 199     RECT16 rect;
 200     GetClientRect16( hwnd, &rect );
 201     DPtoLP16( hdc, (LPPOINT16)&rect, 2 );
 202     PaintRect( hwndParent, hwnd, hdc, hbrush, &rect );
 203 }
 204
 205
 206 /***********************************************************************
 207  *           PaintRect    (USER.325)
 208  */
 209 void PaintRect( HWND16 hwndParent, HWND16 hwnd, HDC16 hdc,
 210                 HBRUSH16 hbrush, const RECT16 *rect)
 211 {
 212       /* Send WM_CTLCOLOR message if needed */
 213
 214     if ((UINT32)hbrush <= CTLCOLOR_MAX)
 215     {
 216         if (!hwndParent) return;
 217         hbrush = (HBRUSH16)SendMessage32A( hwndParent,
 218                                            WM_CTLCOLORMSGBOX + (UINT32)hbrush,
 219                                            (WPARAM32)hdc, (LPARAM)hwnd );
 220     }
 221     if (hbrush) FillRect16( hdc, rect, hbrush );
 222 }
 223
 224
 225 /***********************************************************************
 226  *           GetControlBrush    (USER.326)
 227  */
 228 HBRUSH16 GetControlBrush( HWND hwnd, HDC16 hdc, WORD control )
 229 {
 230     return (HBRUSH16)SendMessage32A( GetParent32(hwnd), WM_CTLCOLOR+control,
 231                                      (WPARAM32)hdc, (LPARAM)hwnd );
 232 }
 233
 234
 235 /***********************************************************************
 236  *           PAINT_RedrawWindow
 237  *
 238  * Note: Windows uses WM_SYNCPAINT to cut down the number of intertask
 239  * SendMessage() calls. From SDK:
 240  *   This message avoids lots of inter-app message traffic
 241  *   by switching to the other task and continuing the
 242  *   recursion there.
 243  *
 244  * wParam         = flags
 245  * LOWORD(lParam) = hrgnClip
 246  * HIWORD(lParam) = hwndSkip  (not used; always NULL)
 247  */
 248 BOOL32 PAINT_RedrawWindow( HWND32 hwnd, const RECT32 *rectUpdate,
 249                            HRGN32 hrgnUpdate, UINT32 flags, UINT32 control )
 250 {
 251     BOOL32 bIcon;
 252     HRGN32 hrgn;
 253     RECT32 rectClient;
 254     WND* wndPtr;
 255     WND **list, **ppWnd;
 256
 257     if (!hwnd) hwnd = GetDesktopWindow32();
 258     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return FALSE;
 259     if (!IsWindowVisible(hwnd) || (wndPtr->flags & WIN_NO_REDRAW))
 260         return TRUE;  /* No redraw needed */
 261
 262     bIcon = (wndPtr->dwStyle & WS_MINIMIZE && wndPtr->class->hIcon);
 263     if (rectUpdate)
 264     {
 265         dprintf_win(stddeb, "RedrawWindow: %04x %d,%d-%d,%d %04x flags=%04x\n",
 266                     hwnd, rectUpdate->left, rectUpdate->top,
 267                     rectUpdate->right, rectUpdate->bottom, hrgnUpdate, flags );
 268     }
 269     else
 270     {
 271         dprintf_win(stddeb, "RedrawWindow: %04x NULL %04x flags=%04x\n",
 272                      hwnd, hrgnUpdate, flags);
 273     }
 274
 275     GetClientRect32( hwnd, &rectClient );
 276
 277     if (flags & RDW_INVALIDATE)  /* Invalidate */
 278     {
 279         int rgnNotEmpty = COMPLEXREGION;
 280
 281         if (wndPtr->hrgnUpdate > 1)  /* Is there already an update region? */
 282         {
 283             if ((hrgn = hrgnUpdate) == 0)
 284                 hrgn = CreateRectRgnIndirect32( rectUpdate ? rectUpdate :
 285                                                 &rectClient );
 286             rgnNotEmpty = CombineRgn32( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate,
 287                                         hrgn, RGN_OR );
 288             if (!hrgnUpdate) DeleteObject32( hrgn );
 289         }
 290         else  /* No update region yet */
 291         {
 292             if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 293                 QUEUE_IncPaintCount( wndPtr->hmemTaskQ );
 294             if (hrgnUpdate)
 295             {
 296                 wndPtr->hrgnUpdate = CreateRectRgn32( 0, 0, 0, 0 );
 297                 rgnNotEmpty = CombineRgn32( wndPtr->hrgnUpdate, hrgnUpdate,
 298                                             0, RGN_COPY );
 299             }
 300             else wndPtr->hrgnUpdate = CreateRectRgnIndirect32( rectUpdate ?
 301                                                     rectUpdate : &rectClient );
 302         }
 303
 304         if (flags & RDW_FRAME) wndPtr->flags |= WIN_NEEDS_NCPAINT;
 305
 306         /* check for bogus update region */
 307         if ( rgnNotEmpty == NULLREGION )
 308            {
 309              wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 310              DeleteObject32( wndPtr->hrgnUpdate );
 311              wndPtr->hrgnUpdate=0;
 312              if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 313                    QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 314            }
 315         else
 316              if (flags & RDW_ERASE) wndPtr->flags |= WIN_NEEDS_ERASEBKGND;
 317         flags |= RDW_FRAME;  /* Force children frame invalidation */
 318     }
 319     else if (flags & RDW_VALIDATE)  /* Validate */
 320     {
 321           /* We need an update region in order to validate anything */
 322         if (wndPtr->hrgnUpdate > 1)
 323         {
 324             if (!hrgnUpdate && !rectUpdate)
 325             {
 326                   /* Special case: validate everything */
 327                 DeleteObject32( wndPtr->hrgnUpdate );
 328                 wndPtr->hrgnUpdate = 0;
 329             }
 330             else
 331             {
 332                 if ((hrgn = hrgnUpdate) == 0)
 333                     hrgn = CreateRectRgnIndirect32( rectUpdate );
 334                 if (CombineRgn32( wndPtr->hrgnUpdate, wndPtr->hrgnUpdate,
 335                                   hrgn, RGN_DIFF ) == NULLREGION)
 336                 {
 337                     DeleteObject32( wndPtr->hrgnUpdate );
 338                     wndPtr->hrgnUpdate = 0;
 339                 }
 340                 if (!hrgnUpdate) DeleteObject32( hrgn );
 341             }
 342             if (!wndPtr->hrgnUpdate)  /* No more update region */
 343                 if (!(wndPtr->flags & WIN_INTERNAL_PAINT))
 344                     QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 345         }
 346         if (flags & RDW_NOFRAME) wndPtr->flags &= ~WIN_NEEDS_NCPAINT;
 347         if (flags & RDW_NOERASE) wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 348     }
 349
 350       /* Set/clear internal paint flag */
 351
 352     if (flags & RDW_INTERNALPAINT)
 353     {
 354         if ( wndPtr->hrgnUpdate <= 1 && !(wndPtr->flags & WIN_INTERNAL_PAINT))
 355             QUEUE_IncPaintCount( wndPtr->hmemTaskQ );
 356         wndPtr->flags |= WIN_INTERNAL_PAINT;
 357     }
 358     else if (flags & RDW_NOINTERNALPAINT)
 359     {
 360         if ( wndPtr->hrgnUpdate <= 1 && (wndPtr->flags & WIN_INTERNAL_PAINT))
 361             QUEUE_DecPaintCount( wndPtr->hmemTaskQ );
 362         wndPtr->flags &= ~WIN_INTERNAL_PAINT;
 363     }
 364
 365       /* Erase/update window */
 366
 367     if (flags & RDW_UPDATENOW)
 368     {
 369         if (wndPtr->hrgnUpdate) /* wm_painticon wparam is 1 */
 370             SendMessage16( hwnd, (bIcon) ? WM_PAINTICON : WM_PAINT, bIcon, 0 );
 371     }
 372     else if (flags & RDW_ERASENOW)
 373     {
 374         if (wndPtr->flags & WIN_NEEDS_NCPAINT)
 375             WIN_UpdateNCArea( wndPtr, FALSE);
 376
 377         if (wndPtr->flags & WIN_NEEDS_ERASEBKGND)
 378         {
 379             HDC32 hdc = GetDCEx32( hwnd, wndPtr->hrgnUpdate,
 380                                    DCX_INTERSECTRGN | DCX_USESTYLE |
 381                                    DCX_KEEPCLIPRGN | DCX_WINDOWPAINT |
 382                                    (bIcon ? DCX_WINDOW : 0) );
 383             if (hdc)
 384             {
 385                if (SendMessage16( hwnd, (bIcon) ? WM_ICONERASEBKGND
 386                                                 : WM_ERASEBKGND,
 387                                   (WPARAM16)hdc, 0 ))
 388                   wndPtr->flags &= ~WIN_NEEDS_ERASEBKGND;
 389                ReleaseDC32( hwnd, hdc );
 390             }
 391         }
 392     }
 393
 394       /* Recursively process children */
 395
 396     if (!(flags & RDW_NOCHILDREN) &&
 397         ((flags & RDW_ALLCHILDREN) || !(wndPtr->dwStyle & WS_CLIPCHILDREN)) &&
 398         !(wndPtr->dwStyle & WS_MINIMIZE) )
 399     {
 400         if ( hrgnUpdate || rectUpdate )
 401         {
 402            if (!(hrgn = CreateRectRgn32( 0, 0, 0, 0 ))) return TRUE;
 403            if( !hrgnUpdate )
 404            {
 405                 control |= (RDW_C_DELETEHRGN | RDW_C_USEHRGN);
 406                 if( !(hrgnUpdate = CreateRectRgnIndirect32( rectUpdate )) )
 407                 {
 408                     DeleteObject32( hrgn );
 409                     return TRUE;
 410                 }
 411            }
 412            list = WIN_BuildWinArray( wndPtr );
 413            for (ppWnd = list; *ppWnd; ppWnd++)
 414            {
 415                wndPtr = *ppWnd;
 416                if (!IsWindow(wndPtr->hwndSelf)) continue;
 417                if (wndPtr->dwStyle & WS_VISIBLE)
 418                {
 419                    SetRectRgn( hrgn, wndPtr->rectWindow.left,
 420                                wndPtr->rectWindow.top,
 421                                wndPtr->rectWindow.right,
 422                                wndPtr->rectWindow.bottom );
 423                    if (!CombineRgn32( hrgn, hrgn, hrgnUpdate, RGN_AND ))
 424                        continue;
 425                    OffsetRgn32( hrgn, -wndPtr->rectClient.left,
 426                                       -wndPtr->rectClient.top );
 427                    PAINT_RedrawWindow( wndPtr->hwndSelf, NULL, hrgn, flags,
 428                                        RDW_C_USEHRGN );
 429                }
 430            }
 431            HeapFree( SystemHeap, 0, list );
 432            DeleteObject32( hrgn );
 433            if (control & RDW_C_DELETEHRGN) DeleteObject32( hrgnUpdate );
 434         }
 435         else
 436         {
 437            list = WIN_BuildWinArray( wndPtr );
 438            for (ppWnd = list; *ppWnd; ppWnd++)
 439            {
 440                wndPtr = *ppWnd;
 441                if (IsWindow( wndPtr->hwndSelf ))
 442                    PAINT_RedrawWindow( wndPtr->hwndSelf, NULL, 0, flags, 0 );
 443            }
 444            HeapFree( SystemHeap, 0, list );
 445         }
 446
 447     }
 448     return TRUE;
 449 }
 450
 451
 452 /***********************************************************************
 453  *           RedrawWindow32    (USER32.425)
 454  */
 455 BOOL32 RedrawWindow32( HWND32 hwnd, const RECT32 *rectUpdate,
 456                        HRGN32 hrgnUpdate, UINT32 flags )
 457 {
 458     WND* wnd = WIN_FindWndPtr( hwnd );
 459
 460     /* check if there is something to redraw */
 461
 462     return ( wnd && WIN_IsWindowDrawable( wnd, !(flags & RDW_FRAME) ) )
 463            ? PAINT_RedrawWindow( hwnd, rectUpdate, hrgnUpdate, flags, 0 )
 464            : 1;
 465 }
 466
 467
 468 /***********************************************************************
 469  *           RedrawWindow16    (USER.290)
 470  */
 471 BOOL16 RedrawWindow16( HWND16 hwnd, const RECT16 *rectUpdate,
 472                        HRGN16 hrgnUpdate, UINT16 flags )
 473 {
 474     if (rectUpdate)
 475     {
 476         RECT32 r;
 477         CONV_RECT16TO32( rectUpdate, &r );
 478         return (BOOL16)RedrawWindow32( (HWND32)hwnd, &r, hrgnUpdate, flags );
 479     }
 480     return (BOOL16)RedrawWindow32( (HWND32)hwnd, NULL, hrgnUpdate, flags );
 481 }
 482
 483
 484 /***********************************************************************
 485  *           UpdateWindow   (USER.124) (USER32.566)
 486  */
 487 void UpdateWindow( HWND32 hwnd )
 488 {
 489     RedrawWindow32( hwnd, NULL, 0, RDW_UPDATENOW | RDW_NOCHILDREN );
 490 }
 491
 492
 493 /***********************************************************************
 494  *           InvalidateRgn   (USER.126) (USER32.328)
 495  */
 496 void InvalidateRgn( HWND32 hwnd, HRGN32 hrgn, BOOL32 erase )
 497 {
 498     RedrawWindow32(hwnd, NULL, hrgn, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 499 }
 500
 501
 502 /***********************************************************************
 503  *           InvalidateRect16   (USER.125)
 504  */
 505 void InvalidateRect16( HWND16 hwnd, const RECT16 *rect, BOOL16 erase )
 506 {
 507     RedrawWindow16( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 508 }
 509
 510
 511 /***********************************************************************
 512  *           InvalidateRect32   (USER32.327)
 513  */
 514 void InvalidateRect32( HWND32 hwnd, const RECT32 *rect, BOOL32 erase )
 515 {
 516     RedrawWindow32( hwnd, rect, 0, RDW_INVALIDATE | (erase ? RDW_ERASE : 0) );
 517 }
 518
 519
 520 /***********************************************************************
 521  *           ValidateRgn   (USER.128) (USER32.571)
 522  */
 523 void ValidateRgn( HWND32 hwnd, HRGN32 hrgn )
 524 {
 525     RedrawWindow32( hwnd, NULL, hrgn, RDW_VALIDATE | RDW_NOCHILDREN );
 526 }
 527
 528
 529 /***********************************************************************
 530  *           ValidateRect16   (USER.127)
 531  */
 532 void ValidateRect16( HWND16 hwnd, const RECT16 *rect )
 533 {
 534     RedrawWindow16( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 535 }
 536
 537
 538 /***********************************************************************
 539  *           ValidateRect32   (USER32.570)
 540  */
 541 void ValidateRect32( HWND32 hwnd, const RECT32 *rect )
 542 {
 543     RedrawWindow32( hwnd, rect, 0, RDW_VALIDATE | RDW_NOCHILDREN );
 544 }
 545
 546
 547 /***********************************************************************
 548  *           GetUpdateRect16   (USER.190)
 549  */
 550 BOOL16 GetUpdateRect16( HWND16 hwnd, LPRECT16 rect, BOOL16 erase )
 551 {
 552     RECT32 r;
 553     BOOL16 ret;
 554
 555     if (!rect) return GetUpdateRect32( hwnd, NULL, erase );
 556     ret = GetUpdateRect32( hwnd, &r, erase );
 557     CONV_RECT32TO16( &r, rect );
 558     return ret;
 559 }
 560
 561
 562 /***********************************************************************
 563  *           GetUpdateRect32   (USER32.296)
 564  */
 565 BOOL32 GetUpdateRect32( HWND32 hwnd, LPRECT32 rect, BOOL32 erase )
 566 {
 567     WND * wndPtr = WIN_FindWndPtr( hwnd );
 568     if (!wndPtr) return FALSE;
 569
 570     if (rect)
 571     {
 572         if (wndPtr->hrgnUpdate > 1)
 573         {
 574             HRGN32 hrgn = CreateRectRgn32( 0, 0, 0, 0 );
 575             if (GetUpdateRgn( hwnd, hrgn, erase ) == ERROR) return FALSE;
 576             GetRgnBox32( hrgn, rect );
 577             DeleteObject32( hrgn );
 578         }
 579         else SetRectEmpty32( rect );
 580     }
 581     return (wndPtr->hrgnUpdate > 1);
 582 }
 583
 584
 585 /***********************************************************************
 586  *           GetUpdateRgn   (USER.237) (USER32.297)
 587  */
 588 INT16 GetUpdateRgn( HWND32 hwnd, HRGN32 hrgn, BOOL32 erase )
 589 {
 590     INT32 retval;
 591     WND * wndPtr = WIN_FindWndPtr( hwnd );
 592     if (!wndPtr) return ERROR;
 593
 594     if (wndPtr->hrgnUpdate <= 1)
 595     {
 596         SetRectRgn( hrgn, 0, 0, 0, 0 );
 597         return NULLREGION;
 598     }
 599     retval = CombineRgn32( hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY );
 600     if (erase) RedrawWindow32( hwnd, NULL, 0, RDW_ERASENOW | RDW_NOCHILDREN );
 601     return retval;
 602 }
 603
 604
 605 /***********************************************************************
 606  *           ExcludeUpdateRgn   (USER.238) (USER32.194)
 607  */
 608 INT16 ExcludeUpdateRgn( HDC32 hdc, HWND32 hwnd )
 609 {
 610     RECT16 rect;
 611     WND * wndPtr;
 612
 613     if (!(wndPtr = WIN_FindWndPtr( hwnd ))) return ERROR;
 614
 615     if (wndPtr->hrgnUpdate)
 616     {
 617         INT16  ret;
 618         HRGN32 hrgn = CreateRectRgn32(wndPtr->rectWindow.left - wndPtr->rectClient.left,
 619                                       wndPtr->rectWindow.top - wndPtr->rectClient.top,
 620                                       wndPtr->rectClient.right - wndPtr->rectClient.left,
 621                                       wndPtr->rectClient.bottom - wndPtr->rectClient.top);
 622         if( wndPtr->hrgnUpdate > 1 )
 623             CombineRgn32(hrgn, wndPtr->hrgnUpdate, 0, RGN_COPY);
 624
 625         /* do ugly coordinate translations in dce.c */
 626
 627         ret = DCE_ExcludeRgn( hdc, wndPtr, hrgn );
 628         DeleteObject32( hrgn );
 629         return ret;
 630     }
 631     return GetClipBox16(hdc, &rect);
 632 }
 633
 634