reactos/subsys/win32k/ntuser/painting.c

   1 /*
   2  *  ReactOS W32 Subsystem
   3  *  Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 ReactOS Team
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  *
  19  *  $Id: painting.c,v 1.56 2003/12/30 16:55:00 weiden Exp $
  20  *
  21  *  COPYRIGHT:        See COPYING in the top level directory
  22  *  PROJECT:          ReactOS kernel
  23  *  PURPOSE:          Window painting function
  24  *  FILE:             subsys/win32k/ntuser/painting.c
  25  *  PROGRAMER:        Filip Navara (xnavara@volny.cz)
  26  *  REVISION HISTORY:
  27  *       06/06/2001   Created (?)
  28  *       18/11/2003   Complete rewrite
  29  */
  30
  31 /* INCLUDES ******************************************************************/
  32
  33 #include <ddk/ntddk.h>
  34 #include <internal/safe.h>
  35 #include <win32k/win32k.h>
  36 #include <include/object.h>
  37 #include <include/guicheck.h>
  38 #include <include/window.h>
  39 #include <include/desktop.h>
  40 #include <include/winpos.h>
  41 #include <include/class.h>
  42 #include <include/caret.h>
  43 #include <include/error.h>
  44 #include <include/winsta.h>
  45 #include <windows.h>
  46 #include <include/painting.h>
  47 #include <user32/wininternal.h>
  48 #include <include/rect.h>
  49 #include <win32k/coord.h>
  50 #include <win32k/region.h>
  51 #include <include/vis.h>
  52 #include <include/intgdi.h>
  53
  54 #define NDEBUG
  55 #include <debug.h>
  56
  57 /* #define FIN_DEBUG */
  58
  59 /* PRIVATE FUNCTIONS **********************************************************/
  60
  61 VOID FASTCALL
  62 IntValidateParent(PWINDOW_OBJECT Child, HRGN ValidRegion)
  63 {
  64    HWND Parent;
  65    PWINDOW_OBJECT ParentWindow;
  66
  67    Parent = NtUserGetAncestor(Child->Self, GA_PARENT);
  68    while (Parent && Parent != IntGetDesktopWindow())
  69    {
  70       ParentWindow = IntGetWindowObject(Parent);
  71       if (ParentWindow && !(ParentWindow->Style & WS_CLIPCHILDREN))
  72       {
  73          if (ParentWindow->UpdateRegion != 0)
  74          {
  75             INT OffsetX, OffsetY;
  76
  77             /*
  78              * We must offset the child region by the offset of the
  79              * child rect in the parent.
  80              */
  81             OffsetX = Child->WindowRect.left - ParentWindow->WindowRect.left;
  82             OffsetY = Child->WindowRect.top - ParentWindow->WindowRect.top;
  83             NtGdiOffsetRgn(ValidRegion, OffsetX, OffsetY );
  84             NtGdiCombineRgn(ParentWindow->UpdateRegion, ParentWindow->UpdateRegion,
  85                ValidRegion, RGN_DIFF);
  86             /* FIXME: If the resulting region is empty, remove fake posted paint message */
  87             NtGdiOffsetRgn(ValidRegion, -OffsetX, -OffsetY);
  88          }
  89       }
  90       IntReleaseWindowObject(ParentWindow);
  91       Parent = NtUserGetAncestor(Parent, GA_PARENT);
  92    }
  93 }
  94
  95 /*
  96  * IntGetNCUpdateRegion
  97  *
  98  * Get nonclient part of window update region.
  99  *
 100  * Return Value
 101  *    Handle to region that represents invalid nonclient window area. The
 102  *    caller is responsible for deleting it.
 103  *
 104  * Remarks
 105  *    This function also marks the nonclient update region of window
 106  *    as valid, clears the WINDOWOBJECT_NEED_NCPAINT flag.
 107  */
 108
 109 HRGN FASTCALL
 110 IntGetNCUpdateRegion(PWINDOW_OBJECT Window)
 111 {
 112    HRGN WindowRgn;
 113    HRGN NonclientRgn;
 114
 115    /*
 116     * Generate the update region.
 117     */
 118
 119    WindowRgn = UnsafeIntCreateRectRgnIndirect(&Window->ClientRect);
 120    NtGdiOffsetRgn(WindowRgn,
 121       -Window->WindowRect.left,
 122       -Window->WindowRect.top);
 123    NonclientRgn = NtGdiCreateRectRgn(0, 0, 0, 0);
 124    if (NtGdiCombineRgn(NonclientRgn, Window->UpdateRegion,
 125        WindowRgn, RGN_DIFF) == NULLREGION)
 126    {
 127       NtGdiDeleteObject(NonclientRgn);
 128       NonclientRgn = NULL;
 129    }
 130
 131    /*
 132     * Remove the nonclient region from the standard update region.
 133     */
 134
 135    if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 136        WindowRgn, RGN_AND) == NULLREGION)
 137    {
 138       NtGdiDeleteObject(Window->UpdateRegion);
 139       Window->UpdateRegion = NULL;
 140    }
 141
 142    return NonclientRgn;
 143 }
 144
 145 /*
 146  * IntPaintWindows
 147  *
 148  * Internal function used by IntRedrawWindow.
 149  */
 150
 151 VOID FASTCALL
 152 IntPaintWindows(PWINDOW_OBJECT Window, ULONG Flags)
 153 {
 154   HDC hDC;
 155   HWND hWnd = Window->Self;
 156
 157   if (! (Window->Style & WS_VISIBLE))
 158     {
 159       return;
 160     }
 161
 162   if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
 163     {
 164       if (Window->Flags & WINDOWOBJECT_NEED_NCPAINT)
 165         {
 166           IntSendMessage(hWnd, WM_NCPAINT, (WPARAM)Window->NCUpdateRegion, 0);
 167           Window->NCUpdateRegion = NULL;
 168           Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
 169           MsqDecPaintCountQueue(Window->MessageQueue);
 170         }
 171
 172       if (Window->Flags & WINDOWOBJECT_NEED_ERASEBKGND)
 173         {
 174           if (Window->UpdateRegion)
 175             {
 176 #ifdef FIN_DEBUG
 177               {
 178                  RECT TempRect;
 179                  UnsafeIntGetRgnBox(Window->UpdateRegion, &TempRect);
 180                  DPRINT1("Sending WM_ERASEBKGND[1]: %d,%d-%d,%d\n",
 181                     TempRect.left, TempRect.top, TempRect.right, TempRect.bottom);
 182               }
 183 #endif
 184               hDC = NtUserGetDCEx(hWnd, 0, DCX_CACHE | DCX_USESTYLE |
 185                                            DCX_INTERSECTUPDATE);
 186               if (hDC != NULL)
 187                 {
 188                   if (IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)hDC, 0))
 189                     {
 190                       Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 191                     }
 192                   NtUserReleaseDC(hWnd, hDC);
 193                 }
 194             }
 195         }
 196
 197       if (Flags & RDW_UPDATENOW)
 198         {
 199           if (Window->UpdateRegion != NULL ||
 200               Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT)
 201             {
 202 #ifdef FIN_DEBUG
 203               {
 204                  RECT TempRect;
 205                  UnsafeIntGetRgnBox(Window->UpdateRegion, &TempRect);
 206                  DPRINT1("Sending WM_PAINT[1]: %d,%d-%d,%d\n",
 207                     TempRect.left, TempRect.top, TempRect.right, TempRect.bottom);
 208               }
 209 #endif
 210               IntSendMessage(hWnd, WM_PAINT, 0, 0);
 211               if (Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT)
 212                 {
 213                   Window->Flags &= ~WINDOWOBJECT_NEED_INTERNALPAINT;
 214                   if (Window->UpdateRegion == NULL)
 215                     {
 216                       MsqDecPaintCountQueue(Window->MessageQueue);
 217                     }
 218                 }
 219             }
 220         }
 221     }
 222
 223   /*
 224    * Check that the window is still valid at this point
 225    */
 226
 227   if (! IntIsWindow(hWnd))
 228     {
 229       return;
 230     }
 231
 232   /*
 233    * Paint child windows.
 234    */
 235   if (!(Flags & RDW_NOCHILDREN) && !(Window->Style & WS_MINIMIZE) &&
 236       ((Flags & RDW_ALLCHILDREN) || !(Window->Style & WS_CLIPCHILDREN)) &&
 237       ! IntIsDesktopWindow(Window))
 238     {
 239       HWND *List, *phWnd;
 240
 241       if ((List = IntWinListChildren(Window)))
 242         {
 243           for (phWnd = List; *phWnd; ++phWnd)
 244             {
 245               Window = IntGetWindowObject(*phWnd);
 246               if (Window)
 247                 {
 248                   IntPaintWindows(Window, Flags);
 249                   IntReleaseWindowObject(Window);
 250                 }
 251             }
 252           ExFreePool(List);
 253         }
 254     }
 255 }
 256
 257 /*
 258  * IntInvalidateWindows
 259  *
 260  * Internal function used by IntRedrawWindow.
 261  */
 262
 263 VOID FASTCALL
 264 IntInvalidateWindows(PWINDOW_OBJECT Window, HRGN hRgn, ULONG Flags,
 265    BOOL ValidateParent)
 266 {
 267    INT RgnType;
 268    BOOL HadPaintMessage, HadNCPaintMessage;
 269    BOOL HasPaintMessage, HasNCPaintMessage;
 270    HRGN hRgnWindow;
 271
 272    /*
 273     * Clip the given region with window rectangle (or region)
 274     */
 275
 276 #ifdef TODO
 277    if (!Window->WindowRegion)
 278 #endif
 279    {
 280       hRgnWindow = UnsafeIntCreateRectRgnIndirect(&Window->WindowRect);
 281       NtGdiOffsetRgn(hRgnWindow,
 282          -Window->WindowRect.left,
 283          -Window->WindowRect.top);
 284       RgnType = NtGdiCombineRgn(hRgn, hRgn, hRgnWindow, RGN_AND);
 285       NtGdiDeleteObject(hRgnWindow);
 286    }
 287 #ifdef TODO
 288    else
 289    {
 290       RgnType = NtGdiCombineRgn(hRgn, hRgn, Window->WindowRegion, RGN_AND);
 291    }
 292 #endif
 293
 294    /*
 295     * Save current state of pending updates
 296     */
 297
 298    HadPaintMessage = Window->UpdateRegion != NULL ||
 299       Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT;
 300    HadNCPaintMessage = Window->Flags & WINDOWOBJECT_NEED_NCPAINT;
 301
 302    /*
 303     * Update the region and flags
 304     */
 305
 306    if (Flags & RDW_INVALIDATE && RgnType != NULLREGION)
 307    {
 308       if (Window->UpdateRegion == NULL)
 309       {
 310          Window->UpdateRegion = NtGdiCreateRectRgn(0, 0, 0, 0);
 311       }
 312
 313       if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 314           hRgn, RGN_OR) == NULLREGION)
 315       {
 316          NtGdiDeleteObject(Window->UpdateRegion);
 317          Window->UpdateRegion = NULL;
 318       }
 319
 320       if (Flags & RDW_FRAME)
 321          Window->Flags |= WINDOWOBJECT_NEED_NCPAINT;
 322       if (Flags & RDW_ERASE)
 323          Window->Flags |= WINDOWOBJECT_NEED_ERASEBKGND;
 324
 325       Flags |= RDW_FRAME;
 326    }
 327
 328    if (Flags & RDW_VALIDATE && RgnType != NULLREGION)
 329    {
 330       if (Window->UpdateRegion != NULL)
 331       {
 332          if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 333              hRgn, RGN_DIFF) == NULLREGION)
 334          {
 335             NtGdiDeleteObject(Window->UpdateRegion);
 336             Window->UpdateRegion = NULL;
 337          }
 338       }
 339
 340       if (Window->UpdateRegion == NULL)
 341          Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 342       if (Flags & RDW_NOFRAME)
 343          Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
 344       if (Flags & RDW_NOERASE)
 345          Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 346    }
 347
 348    if (Flags & RDW_INTERNALPAINT)
 349    {
 350       Window->Flags |= WINDOWOBJECT_NEED_INTERNALPAINT;
 351    }
 352
 353    if (Flags & RDW_NOINTERNALPAINT)
 354    {
 355       Window->Flags &= ~WINDOWOBJECT_NEED_INTERNALPAINT;
 356    }
 357
 358    /*
 359     * Validate parent covered by region
 360     */
 361
 362    if (ValidateParent)
 363    {
 364       IntValidateParent(Window, Window->UpdateRegion);
 365    }
 366
 367    /*
 368     * Split the nonclient update region.
 369     */
 370
 371    if (Window->NCUpdateRegion == NULL)
 372    {
 373       Window->NCUpdateRegion = IntGetNCUpdateRegion(Window);
 374    }
 375    else
 376    {
 377       HRGN hRgnNonClient = IntGetNCUpdateRegion(Window);
 378       NtGdiCombineRgn(Window->NCUpdateRegion, Window->NCUpdateRegion,
 379          hRgnNonClient, RGN_OR);
 380       NtGdiDeleteObject(hRgnNonClient);
 381    }
 382
 383    /*
 384     * Process children if needed
 385     */
 386
 387    if (!(Flags & RDW_NOCHILDREN) && !(Window->Style & WS_MINIMIZE) &&
 388        ((Flags & RDW_ALLCHILDREN) || !(Window->Style & WS_CLIPCHILDREN)))
 389    {
 390       HWND *List, *phWnd;
 391       PWINDOW_OBJECT Child;
 392
 393       if ((List = IntWinListChildren(Window)))
 394       {
 395          for (phWnd = List; *phWnd; ++phWnd)
 396          {
 397             Child = IntGetWindowObject(*phWnd);
 398             if(!Child)
 399             {
 400               continue;
 401             }
 402             if (Child->Style & WS_VISIBLE)
 403             {
 404                RECT TempRect;
 405
 406                /*
 407                 * Recursive call to update children UpdateRegion
 408                 */
 409                HRGN hRgnTemp = NtGdiCreateRectRgn(0, 0, 0, 0);
 410                NtGdiCombineRgn(hRgnTemp, hRgn, 0, RGN_COPY);
 411                NtGdiOffsetRgn(hRgnTemp,
 412                   Window->WindowRect.left - Child->WindowRect.left,
 413                   Window->WindowRect.top - Child->WindowRect.top);
 414                IntInvalidateWindows(Child, hRgnTemp, Flags, FALSE);
 415
 416                /*
 417                 * Update our UpdateRegion depending on children
 418                 */
 419
 420                if (Window->UpdateRegion != NULL)
 421                {
 422                   UnsafeIntGetRgnBox(Window->UpdateRegion, &TempRect);
 423                   NtGdiCombineRgn(hRgnTemp, Child->UpdateRegion, 0, RGN_COPY);
 424                   NtGdiCombineRgn(hRgnTemp, hRgnTemp, Child->NCUpdateRegion, RGN_OR);
 425                   NtGdiOffsetRgn(hRgnTemp,
 426                      Child->WindowRect.left - Window->WindowRect.left,
 427                      Child->WindowRect.top - Window->WindowRect.top);
 428                   UnsafeIntGetRgnBox(hRgnTemp, &TempRect);
 429                   if (NtGdiCombineRgn(Window->UpdateRegion, Window->UpdateRegion,
 430                       hRgnTemp, RGN_DIFF) == NULLREGION)
 431                   {
 432                      NtGdiDeleteObject(Window->UpdateRegion);
 433                      Window->UpdateRegion = NULL;
 434                   }
 435                }
 436                NtGdiDeleteObject(hRgnTemp);
 437             }
 438             IntReleaseWindowObject(Child);
 439          }
 440          ExFreePool(List);
 441       }
 442    }
 443
 444    /*
 445     * Fake post paint messages to window message queue if needed
 446     */
 447    HasPaintMessage = Window->UpdateRegion != NULL ||
 448          Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT;
 449    HasNCPaintMessage = Window->Flags & WINDOWOBJECT_NEED_NCPAINT;
 450
 451    if (HasPaintMessage != HadPaintMessage)
 452    {
 453       if (HadPaintMessage)
 454          MsqDecPaintCountQueue(Window->MessageQueue);
 455       else
 456          MsqIncPaintCountQueue(Window->MessageQueue);
 457    }
 458
 459    if (HasNCPaintMessage != HadNCPaintMessage)
 460    {
 461       if (HadNCPaintMessage)
 462          MsqDecPaintCountQueue(Window->MessageQueue);
 463       else
 464          MsqIncPaintCountQueue(Window->MessageQueue);
 465    }
 466 }
 467
 468 /*
 469  * IntIsWindowDrawable
 470  *
 471  * Remarks
 472  *    Window is drawable when it is visible and all parents are not
 473  *    minimized.
 474  */
 475
 476 BOOL FASTCALL
 477 IntIsWindowDrawable(PWINDOW_OBJECT Window)
 478 {
 479    PWINDOW_OBJECT Wnd = Window;
 480
 481    for (; Wnd; Wnd = Wnd->Parent)
 482    {
 483       if (!(Wnd->Style & WS_VISIBLE) ||
 484           ((Wnd->Style & WS_MINIMIZE) && (Wnd != Window)))
 485          return FALSE;
 486    }
 487
 488    return TRUE;
 489 }
 490
 491 /*
 492  * IntRedrawWindow
 493  *
 494  * Internal version of NtUserRedrawWindow that takes WINDOW_OBJECT as
 495  * first parameter.
 496  */
 497
 498 BOOL FASTCALL
 499 IntRedrawWindow(PWINDOW_OBJECT Window, const RECT* UpdateRect, HRGN UpdateRgn,
 500    ULONG Flags)
 501 {
 502    HRGN hRgn = NULL;
 503
 504    /*
 505     * Step 1.
 506     * Validation of passed parameters.
 507     */
 508
 509    if (!IntIsWindowDrawable(Window) ||
 510        (Flags & (RDW_VALIDATE | RDW_INVALIDATE)) ==
 511        (RDW_VALIDATE | RDW_INVALIDATE))
 512    {
 513       return FALSE;
 514    }
 515
 516    /*
 517     * Step 2.
 518     * Transform the parameters UpdateRgn and UpdateRect into
 519     * a region hRgn specified in window coordinates.
 520     */
 521
 522    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE))
 523    {
 524       if (UpdateRgn != NULL)
 525       {
 526          hRgn = NtGdiCreateRectRgn(0, 0, 0, 0);
 527          NtGdiCombineRgn(hRgn, UpdateRgn, NULL, RGN_COPY);
 528          NtGdiOffsetRgn(hRgn,
 529             Window->ClientRect.left - Window->WindowRect.left,
 530             Window->ClientRect.top - Window->WindowRect.top);
 531       } else
 532       if (UpdateRect != NULL)
 533       {
 534          hRgn = UnsafeIntCreateRectRgnIndirect((RECT *)UpdateRect);
 535          NtGdiOffsetRgn(hRgn,
 536             Window->ClientRect.left - Window->WindowRect.left,
 537             Window->ClientRect.top - Window->WindowRect.top);
 538       } else
 539       if ((Flags & (RDW_INVALIDATE | RDW_FRAME)) == (RDW_INVALIDATE | RDW_FRAME) ||
 540           (Flags & (RDW_VALIDATE | RDW_NOFRAME)) == (RDW_VALIDATE | RDW_NOFRAME))
 541       {
 542          hRgn = UnsafeIntCreateRectRgnIndirect(&Window->WindowRect);
 543          NtGdiOffsetRgn(hRgn,
 544             -Window->WindowRect.left,
 545             -Window->WindowRect.top);
 546       }
 547       else
 548       {
 549          hRgn = UnsafeIntCreateRectRgnIndirect(&Window->ClientRect);
 550          NtGdiOffsetRgn(hRgn,
 551             -Window->WindowRect.left,
 552             -Window->WindowRect.top);
 553       }
 554    }
 555
 556    /*
 557     * Step 3.
 558     * Adjust the window update region depending on hRgn and flags.
 559     */
 560
 561    if (Flags & (RDW_INVALIDATE | RDW_VALIDATE | RDW_INTERNALPAINT | RDW_NOINTERNALPAINT))
 562    {
 563       IntInvalidateWindows(Window, hRgn, Flags, TRUE);
 564    } else
 565    if (Window->UpdateRegion != NULL && Flags & RDW_ERASENOW)
 566    {
 567       /* Validate parent covered by region. */
 568       IntValidateParent(Window, Window->UpdateRegion);
 569    }
 570
 571    /*
 572     * Step 4.
 573     * Repaint and erase windows if needed.
 574     */
 575
 576    if (Flags & (RDW_ERASENOW | RDW_UPDATENOW))
 577    {
 578       IntPaintWindows(Window, Flags);
 579    }
 580
 581    /*
 582     * Step 5.
 583     * Cleanup ;-)
 584     */
 585
 586    if (NULL != hRgn)
 587    {
 588       NtGdiDeleteObject(hRgn);
 589    }
 590
 591    return TRUE;
 592 }
 593
 594 HWND STDCALL
 595 IntFindWindowToRepaint(HWND hWnd, PW32THREAD Thread)
 596 {
 597    PWINDOW_OBJECT Window;
 598    PWINDOW_OBJECT Child;
 599    HWND hFoundWnd = NULL;
 600
 601    if (hWnd == NULL)
 602    {
 603       PLIST_ENTRY CurrentEntry;
 604
 605       ExAcquireFastMutex(&Thread->WindowListLock);
 606
 607       for (CurrentEntry = Thread->WindowListHead.Flink;
 608            CurrentEntry != &Thread->WindowListHead;
 609            CurrentEntry = CurrentEntry->Flink)
 610       {
 611          Window = CONTAINING_RECORD(CurrentEntry, WINDOW_OBJECT, ThreadListEntry);
 612          if (Window->Parent != NULL && !IntIsDesktopWindow(Window->Parent))
 613          {
 614             continue;
 615          }
 616          if (Window->Style & WS_VISIBLE)
 617          {
 618             hFoundWnd = IntFindWindowToRepaint(Window->Self, Thread);
 619             if (hFoundWnd != NULL)
 620             {
 621                 ExReleaseFastMutex(&Thread->WindowListLock);
 622                 return hFoundWnd;
 623             }
 624          }
 625       }
 626
 627       ExReleaseFastMutex(&Thread->WindowListLock);
 628       return NULL;
 629    }
 630    else
 631    {
 632       Window = IntGetWindowObject(hWnd);
 633       if (Window == NULL)
 634          return NULL;
 635
 636       if ((Window->UpdateRegion != NULL ||
 637           Window->Flags & (WINDOWOBJECT_NEED_INTERNALPAINT | WINDOWOBJECT_NEED_NCPAINT)) &&
 638           IntWndBelongsToThread(Window, Thread))
 639       {
 640          IntReleaseWindowObject(Window);
 641          return hWnd;
 642       }
 643
 644       ExAcquireFastMutex(&Window->ChildrenListLock);
 645
 646       for (Child = Window->FirstChild; Child; Child = Child->NextSibling)
 647       {
 648          if (Child->Style & WS_VISIBLE &&
 649              (Child->UpdateRegion != NULL ||
 650               Child->Flags & WINDOWOBJECT_NEED_INTERNALPAINT ||
 651               Child->Flags & WINDOWOBJECT_NEED_NCPAINT))
 652          {
 653             hFoundWnd = Child->Self;
 654             break;
 655          }
 656       }
 657
 658       if (hFoundWnd == NULL)
 659       {
 660          for (Child = Window->FirstChild; Child; Child = Child->NextSibling)
 661          {
 662             if (Child->Style & WS_VISIBLE)
 663             {
 664                hFoundWnd = IntFindWindowToRepaint(Child->Self, Thread);
 665                if (hFoundWnd != NULL)
 666                   break;
 667             }
 668          }
 669       }
 670
 671       ExReleaseFastMutex(&Window->ChildrenListLock);
 672       IntReleaseWindowObject(Window);
 673
 674       return hFoundWnd;
 675    }
 676 }
 677
 678 BOOL FASTCALL
 679 IntGetPaintMessage(HWND hWnd, PW32THREAD Thread, MSG *Message,
 680    BOOL Remove)
 681 {
 682    PWINDOW_OBJECT Window;
 683    PUSER_MESSAGE_QUEUE MessageQueue = (PUSER_MESSAGE_QUEUE)Thread->MessageQueue;
 684
 685    if (!MessageQueue->PaintPosted)
 686       return FALSE;
 687
 688    if (hWnd)
 689       Message->hwnd = IntFindWindowToRepaint(hWnd, PsGetWin32Thread());
 690    else
 691       Message->hwnd = IntFindWindowToRepaint(NULL, PsGetWin32Thread());
 692
 693    if (Message->hwnd == NULL)
 694    {
 695 #if 0
 696       DPRINT1("PAINTING BUG: Thread marked as containing dirty windows, but no dirty windows found!\n");
 697       /* FIXME: Lock the queue! */
 698       MessageQueue->PaintPosted = 0;
 699       MessageQueue->PaintCount = 0;
 700 #endif
 701       return FALSE;
 702    }
 703
 704    Window = IntGetWindowObject(Message->hwnd);
 705    if (Window != NULL)
 706    {
 707       if (Window->Flags & WINDOWOBJECT_NEED_NCPAINT)
 708       {
 709          Message->message = WM_NCPAINT;
 710          Message->wParam = (WPARAM)Window->NCUpdateRegion;
 711          Message->lParam = 0;
 712          if (Remove)
 713          {
 714             Window->NCUpdateRegion = NULL;
 715             Window->Flags &= ~WINDOWOBJECT_NEED_NCPAINT;
 716             MsqDecPaintCountQueue(Window->MessageQueue);
 717          }
 718       } else
 719       {
 720 #ifdef FIN_DEBUG
 721          {
 722             RECT TempRect;
 723             UnsafeIntGetRgnBox(Window->UpdateRegion, &TempRect);
 724             DPRINT1("Sending WM_PAINT[2]: %d,%d-%d,%d\n",
 725                TempRect.left, TempRect.top, TempRect.right, TempRect.bottom);
 726          }
 727 #endif
 728          Message->message = WM_PAINT;
 729          Message->wParam = Message->lParam = 0;
 730          if (Remove && Window->Flags & WINDOWOBJECT_NEED_INTERNALPAINT)
 731          {
 732             Window->Flags &= ~WINDOWOBJECT_NEED_INTERNALPAINT;
 733             if (Window->UpdateRegion == NULL)
 734             {
 735                MsqDecPaintCountQueue(Window->MessageQueue);
 736             }
 737          }
 738       }
 739
 740       IntReleaseWindowObject(Window);
 741       return TRUE;
 742    }
 743
 744    return FALSE;
 745 }
 746
 747 HWND FASTCALL
 748 IntFixCaret(HWND hWnd, LPRECT lprc, UINT flags)
 749 {
 750    GUITHREADINFO info;
 751
 752    if (!NtUserGetGUIThreadInfo(0, &info))
 753       return 0;
 754    if (!info.hwndCaret)
 755       return 0;
 756    if (info.hwndCaret == hWnd ||
 757        ((flags & SW_SCROLLCHILDREN) && IntIsChildWindow(hWnd, info.hwndCaret)))
 758    {
 759       POINT pt, FromOffset, ToOffset, Offset;
 760
 761       pt.x = info.rcCaret.left;
 762       pt.y = info.rcCaret.top;
 763
 764       IntGetClientOrigin(info.hwndCaret, &FromOffset);
 765       IntGetClientOrigin(hWnd, &ToOffset);
 766       Offset.x = FromOffset.x - ToOffset.x;
 767       Offset.y = FromOffset.y - ToOffset.y;
 768       info.rcCaret.left += Offset.x;
 769       info.rcCaret.top += Offset.y;
 770       info.rcCaret.right += Offset.x;
 771       info.rcCaret.bottom += Offset.y;
 772       if (NtGdiIntersectRect(lprc, lprc, &info.rcCaret))
 773       {
 774          NtUserHideCaret(0);
 775          lprc->left = pt.x;
 776          lprc->top = pt.y;
 777          return info.hwndCaret;
 778       }
 779    }
 780
 781    return 0;
 782 }
 783
 784 /* PUBLIC FUNCTIONS ***********************************************************/
 785
 786 /*
 787  * NtUserBeginPaint
 788  *
 789  * Status
 790  *    @implemented
 791  */
 792
 793 HDC STDCALL
 794 NtUserBeginPaint(HWND hWnd, PAINTSTRUCT* lPs)
 795 {
 796    PWINDOW_OBJECT Window;
 797    RECT ClientRect;
 798    RECT ClipRect;
 799    INT DcxFlags;
 800
 801    if (!(Window = IntGetWindowObject(hWnd)))
 802    {
 803       SetLastWin32Error(ERROR_INVALID_WINDOW_HANDLE);
 804       return NULL;
 805    }
 806
 807    NtUserHideCaret(hWnd);
 808
 809    DcxFlags = DCX_INTERSECTUPDATE | DCX_WINDOWPAINT | DCX_USESTYLE;
 810
 811    lPs->hdc = NtUserGetDCEx(hWnd, 0, DcxFlags);
 812
 813    if (!lPs->hdc)
 814    {
 815       IntReleaseWindowObject(Window);
 816       return NULL;
 817    }
 818
 819 /*   IntRedrawWindow(Window, NULL, 0, RDW_NOINTERNALPAINT | RDW_VALIDATE | RDW_NOCHILDREN);*/
 820 #ifdef FIN_DEBUG
 821    if (Window->Flags & WINDOWOBJECT_NEED_ERASEBKGND)
 822    {
 823       RECT TempRect;
 824       UnsafeIntGetRgnBox(Window->UpdateRegion, &TempRect);
 825       DPRINT1("Sending WM_ERASEBKGND[2]: %d,%d-%d,%d\n",
 826          TempRect.left, TempRect.top, TempRect.right, TempRect.bottom);
 827    }
 828 #endif
 829
 830    if (Window->UpdateRegion != NULL)
 831    {
 832       MsqDecPaintCountQueue(Window->MessageQueue);
 833       IntValidateParent(Window, Window->UpdateRegion);
 834       NtGdiDeleteObject(Window->UpdateRegion);
 835       Window->UpdateRegion = NULL;
 836    }
 837
 838    IntGetClientRect(Window, &ClientRect);
 839    IntGdiGetClipBox(lPs->hdc, &ClipRect);
 840    NtGdiLPtoDP(lPs->hdc, (LPPOINT)&ClipRect, 2);
 841    NtGdiIntersectRect(&lPs->rcPaint, &ClientRect, &ClipRect);
 842    NtGdiDPtoLP(lPs->hdc, (LPPOINT)&lPs->rcPaint, 2);
 843
 844    if (Window->Flags & WINDOWOBJECT_NEED_ERASEBKGND)
 845    {
 846       Window->Flags &= ~WINDOWOBJECT_NEED_ERASEBKGND;
 847       lPs->fErase = !IntSendMessage(hWnd, WM_ERASEBKGND, (WPARAM)lPs->hdc, 0);
 848    }
 849    else
 850    {
 851       lPs->fErase = FALSE;
 852    }
 853
 854    IntReleaseWindowObject(Window);
 855
 856    return lPs->hdc;
 857 }
 858
 859 /*
 860  * NtUserEndPaint
 861  *
 862  * Status
 863  *    @implemented
 864  */
 865
 866 BOOL STDCALL
 867 NtUserEndPaint(HWND hWnd, CONST PAINTSTRUCT* lPs)
 868 {
 869    NtUserReleaseDC(hWnd, lPs->hdc);
 870    NtUserShowCaret(hWnd);
 871
 872    return TRUE;
 873 }
 874
 875 /*
 876  * NtUserInvalidateRect
 877  *
 878  * Status
 879  *    @implemented
 880  */
 881
 882 DWORD STDCALL
 883 NtUserInvalidateRect(HWND hWnd, CONST RECT *Rect, BOOL Erase)
 884 {
 885    return NtUserRedrawWindow(hWnd, Rect, 0, RDW_INVALIDATE | (Erase ? RDW_ERASE : 0));
 886 }
 887
 888 /*
 889  * NtUserInvalidateRgn
 890  *
 891  * Status
 892  *    @implemented
 893  */
 894
 895 DWORD STDCALL
 896 NtUserInvalidateRgn(HWND hWnd, HRGN Rgn, BOOL Erase)
 897 {
 898    return NtUserRedrawWindow(hWnd, NULL, Rgn, RDW_INVALIDATE | (Erase ? RDW_ERASE : 0));
 899 }
 900
 901 /*
 902  * NtUserValidateRgn
 903  *
 904  * Status
 905  *    @implemented
 906  */
 907
 908 BOOL STDCALL
 909 NtUserValidateRgn(HWND hWnd, HRGN hRgn)
 910 {
 911    return NtUserRedrawWindow(hWnd, NULL, hRgn, RDW_VALIDATE | RDW_NOCHILDREN);
 912 }
 913
 914 /*
 915  * NtUserUpdateWindow
 916  *
 917  * Status
 918  *    @implemented
 919  */
 920
 921 BOOL STDCALL
 922 NtUserUpdateWindow(HWND hWnd)
 923 {
 924    return NtUserRedrawWindow(hWnd, NULL, 0, RDW_UPDATENOW | RDW_ALLCHILDREN);
 925 }
 926
 927 /*
 928  * NtUserGetUpdateRgn
 929  *
 930  * Status
 931  *    @implemented
 932  */
 933
 934 INT STDCALL
 935 NtUserGetUpdateRgn(HWND hWnd, HRGN hRgn, BOOL bErase)
 936 {
 937    PWINDOW_OBJECT Window;
 938    int RegionType;
 939
 940    if (!(Window = IntGetWindowObject(hWnd)))
 941    {
 942       SetLastWin32Error(ERROR_INVALID_WINDOW_HANDLE);
 943       return ERROR;
 944    }
 945
 946    if (Window->UpdateRegion == NULL)
 947    {
 948       RegionType = (NtGdiSetRectRgn(hRgn, 0, 0, 0, 0) ? NULLREGION : ERROR);
 949    }
 950    else
 951    {
 952       RegionType = NtGdiCombineRgn(hRgn, Window->UpdateRegion, hRgn, RGN_COPY);
 953       NtGdiOffsetRgn(
 954          hRgn,
 955          Window->WindowRect.left - Window->ClientRect.left,
 956          Window->WindowRect.top - Window->ClientRect.top);
 957    }
 958
 959    IntReleaseWindowObject(Window);
 960
 961    if (bErase && RegionType != NULLREGION && RegionType != ERROR)
 962    {
 963       NtUserRedrawWindow(hWnd, NULL, NULL, RDW_ERASENOW | RDW_NOCHILDREN);
 964    }
 965
 966    return RegionType;
 967 }
 968
 969 /*
 970  * NtUserGetUpdateRect
 971  *
 972  * Status
 973  *    @implemented
 974  */
 975
 976 BOOL STDCALL
 977 NtUserGetUpdateRect(HWND hWnd, LPRECT lpRect, BOOL fErase)
 978 {
 979    HRGN hRgn = NtGdiCreateRectRgn(0, 0, 0, 0);
 980
 981    if (!lpRect)
 982    {
 983       SetLastWin32Error(ERROR_INVALID_PARAMETER);
 984       return FALSE;
 985    }
 986
 987    NtUserGetUpdateRgn(hWnd, hRgn, fErase);
 988    NtGdiGetRgnBox(hRgn, lpRect);
 989
 990    return lpRect->left < lpRect->right && lpRect->top < lpRect->bottom;
 991 }
 992
 993 /*
 994  * NtUserRedrawWindow
 995  *
 996  * Status
 997  *    @implemented
 998  */
 999
1000 BOOL STDCALL
1001 NtUserRedrawWindow(HWND hWnd, CONST RECT *lprcUpdate, HRGN hrgnUpdate,
1002    UINT flags)
1003 {
1004    RECT SafeUpdateRect;
1005    NTSTATUS Status;
1006    PWINDOW_OBJECT Wnd;
1007
1008    if (!(Wnd = IntGetWindowObject(hWnd ? hWnd : IntGetDesktopWindow())))
1009    {
1010       SetLastWin32Error(ERROR_INVALID_WINDOW_HANDLE);
1011       return FALSE;
1012    }
1013
1014    if (lprcUpdate != NULL)
1015    {
1016       Status = MmCopyFromCaller(&SafeUpdateRect, (PRECT)lprcUpdate,
1017          sizeof(RECT));
1018
1019       if (!NT_SUCCESS(Status))
1020       {
1021          SetLastWin32Error(ERROR_INVALID_PARAMETER);
1022          return FALSE;
1023       }
1024    }
1025
1026    Status = IntRedrawWindow(Wnd, NULL == lprcUpdate ? NULL : &SafeUpdateRect,
1027       hrgnUpdate, flags);
1028
1029    if (!NT_SUCCESS(Status))
1030    {
1031       /* IntRedrawWindow fails only in case that flags are invalid */
1032       SetLastWin32Error(ERROR_INVALID_PARAMETER);
1033       return FALSE;
1034    }
1035
1036    return TRUE;
1037 }
1038
1039 /*
1040  * NtUserScrollDC
1041  *
1042  * Status
1043  *    @implemented
1044  */
1045
1046 DWORD STDCALL
1047 NtUserScrollDC(HDC hDC, INT dx, INT dy, const RECT *lprcScroll,
1048    const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate)
1049 {
1050    RECT rSrc, rClipped_src, rClip, rDst, offset;
1051
1052    /*
1053     * Compute device clipping region (in device coordinates).
1054     */
1055
1056    if (lprcScroll)
1057       rSrc = *lprcScroll;
1058    else
1059       IntGdiGetClipBox(hDC, &rSrc);
1060    NtGdiLPtoDP(hDC, (LPPOINT)&rSrc, 2);
1061
1062    if (lprcClip)
1063       rClip = *lprcClip;
1064    else
1065       IntGdiGetClipBox(hDC, &rClip);
1066    NtGdiLPtoDP(hDC, (LPPOINT)&rClip, 2);
1067
1068    NtGdiIntersectRect(&rClipped_src, &rSrc, &rClip);
1069
1070    rDst = rClipped_src;
1071    NtGdiSetRect(&offset, 0, 0, dx, dy);
1072    NtGdiLPtoDP(hDC, (LPPOINT)&offset, 2);
1073    NtGdiOffsetRect(&rDst, offset.right - offset.left,  offset.bottom - offset.top);
1074    NtGdiIntersectRect(&rDst, &rDst, &rClip);
1075
1076    /*
1077     * Copy bits, if possible.
1078     */
1079
1080    if (rDst.bottom > rDst.top && rDst.right > rDst.left)
1081    {
1082       RECT rDst_lp = rDst, rSrc_lp = rDst;
1083
1084       NtGdiOffsetRect(&rSrc_lp, offset.left - offset.right, offset.top - offset.bottom);
1085       NtGdiDPtoLP(hDC, (LPPOINT)&rDst_lp, 2);
1086       NtGdiDPtoLP(hDC, (LPPOINT)&rSrc_lp, 2);
1087
1088       if (!NtGdiBitBlt(hDC, rDst_lp.left, rDst_lp.top, rDst_lp.right - rDst_lp.left,
1089                        rDst_lp.bottom - rDst_lp.top, hDC, rSrc_lp.left, rSrc_lp.top,
1090                        SRCCOPY))
1091          return FALSE;
1092    }
1093
1094    /*
1095     * Compute update areas.  This is the clipped source or'ed with the
1096     * unclipped source translated minus the clipped src translated (rDst)
1097     * all clipped to rClip.
1098     */
1099
1100    if (hrgnUpdate || lprcUpdate)
1101    {
1102       HRGN hRgn = hrgnUpdate, hRgn2;
1103
1104       if (hRgn)
1105          NtGdiSetRectRgn(hRgn, rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom);
1106       else
1107          hRgn = NtGdiCreateRectRgn(rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom);
1108
1109       hRgn2 = NtGdiCreateRectRgnIndirect(&rSrc);
1110       NtGdiOffsetRgn(hRgn2, offset.right - offset.left,  offset.bottom - offset.top);
1111       NtGdiCombineRgn(hRgn, hRgn, hRgn2, RGN_OR);
1112
1113       NtGdiSetRectRgn(hRgn2, rDst.left, rDst.top, rDst.right, rDst.bottom);
1114       NtGdiCombineRgn(hRgn, hRgn, hRgn2, RGN_DIFF);
1115
1116       NtGdiSetRectRgn(hRgn2, rClip.left, rClip.top, rClip.right, rClip.bottom);
1117       NtGdiCombineRgn(hRgn, hRgn, hRgn2, RGN_AND);
1118
1119       if (lprcUpdate)
1120       {
1121          NtGdiGetRgnBox(hRgn, lprcUpdate);
1122
1123          /* Put the lprcUpdate in logical coordinate */
1124          NtGdiDPtoLP(hDC, (LPPOINT)lprcUpdate, 2);
1125       }
1126       if (!hrgnUpdate)
1127          NtGdiDeleteObject(hRgn);
1128       NtGdiDeleteObject(hRgn2);
1129    }
1130    return TRUE;
1131 }
1132
1133 /*
1134  * NtUserScrollWindowEx
1135  *
1136  * Status
1137  *    @implemented
1138  */
1139
1140 DWORD STDCALL
1141 NtUserScrollWindowEx(HWND hWnd, INT dx, INT dy, const RECT *rect,
1142    const RECT *clipRect, HRGN hrgnUpdate, LPRECT rcUpdate, UINT flags)
1143 {
1144    RECT rc, cliprc, caretrc;
1145    INT Result;
1146    PWINDOW_OBJECT Window;
1147    HDC hDC;
1148    HRGN hrgnTemp;
1149    HWND hwndCaret;
1150    BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
1151    BOOL bOwnRgn = TRUE;
1152
1153    Window = IntGetWindowObject(hWnd);
1154    if (!Window || !IntIsWindowDrawable(Window))
1155    {
1156       IntReleaseWindowObject(Window);
1157       return ERROR;
1158    }
1159
1160    IntGetClientRect(Window, &rc);
1161    if (rect)
1162       NtGdiIntersectRect(&rc, &rc, rect);
1163
1164    if (clipRect)
1165       NtGdiIntersectRect(&cliprc, &rc, clipRect);
1166    else
1167       cliprc = rc;
1168
1169    if (cliprc.right <= cliprc.left || cliprc.bottom <= cliprc.top ||
1170        (dx == 0 && dy == 0))
1171    {
1172       return NULLREGION;
1173    }
1174
1175    caretrc = rc;
1176    hwndCaret = IntFixCaret(hWnd, &caretrc, flags);
1177
1178    if (hrgnUpdate)
1179       bOwnRgn = FALSE;
1180    else if (bUpdate)
1181       hrgnUpdate = NtGdiCreateRectRgn(0, 0, 0, 0);
1182
1183    hDC = NtUserGetDCEx( hWnd, 0, DCX_CACHE | DCX_USESTYLE );
1184    if (hDC)
1185    {
1186       HRGN hRgn = NtGdiCreateRectRgn( 0, 0, 0, 0 );
1187
1188       NtUserScrollDC(hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate);
1189       NtUserReleaseDC(hWnd, hDC);
1190       if (bUpdate)
1191          NtGdiCombineRgn(hrgnUpdate, hrgnUpdate, hRgn, RGN_OR);
1192       else
1193          NtUserRedrawWindow(hWnd, NULL, hRgn, RDW_INVALIDATE | RDW_ERASE);
1194       NtGdiDeleteObject(hRgn);
1195    }
1196
1197    /*
1198     * Take into account the fact that some damage may have occurred during
1199     * the scroll.
1200     */
1201
1202    hrgnTemp = NtGdiCreateRectRgn(0, 0, 0, 0);
1203    Result = NtUserGetUpdateRgn(hWnd, hrgnTemp, FALSE);
1204    if (Result != NULLREGION)
1205    {
1206       HRGN hrgnClip = NtGdiCreateRectRgnIndirect(&cliprc);
1207       NtGdiOffsetRgn(hrgnTemp, dx, dy);
1208       NtGdiCombineRgn(hrgnTemp, hrgnTemp, hrgnClip, RGN_AND);
1209       NtUserRedrawWindow(hWnd, NULL, hrgnTemp, RDW_INVALIDATE | RDW_ERASE);
1210       NtGdiDeleteObject(hrgnClip);
1211    }
1212    NtGdiDeleteObject(hrgnTemp);
1213
1214    if (flags & SW_SCROLLCHILDREN)
1215    {
1216       HWND *List = IntWinListChildren(Window);
1217       if (List)
1218       {
1219          int i;
1220          RECT r, dummy;
1221          POINT ClientOrigin;
1222
1223          for (i = 0; List[i]; i++)
1224          {
1225             NtUserGetWindowRect(List[i], &r);
1226             IntGetClientOrigin(hWnd, &ClientOrigin);
1227             r.left -= ClientOrigin.x;
1228             r.top -= ClientOrigin.y;
1229             r.right -= ClientOrigin.x;
1230             r.bottom -= ClientOrigin.y;
1231             if (!rect || NtGdiIntersectRect(&dummy, &r, &rc))
1232                WinPosSetWindowPos(List[i], 0, r.left + dx, r.top + dy, 0, 0,
1233                                   SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
1234                                   SWP_NOREDRAW);
1235          }
1236          ExFreePool(List);
1237       }
1238    }
1239
1240    if (flags & (SW_INVALIDATE | SW_ERASE))
1241       NtUserRedrawWindow(hWnd, NULL, hrgnUpdate, RDW_INVALIDATE | RDW_ERASE |
1242                          ((flags & SW_ERASE) ? RDW_ERASENOW : 0) |
1243                          ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0));
1244
1245    if (bOwnRgn && hrgnUpdate)
1246       NtGdiDeleteObject(hrgnUpdate);
1247
1248    if (hwndCaret)
1249    {
1250       IntSetCaretPos(caretrc.left + dx, caretrc.top + dy);
1251       NtUserShowCaret(hwndCaret);
1252    }
1253
1254    IntReleaseWindowObject(Window);
1255
1256    return Result;
1257 }
1258
1259 /* EOF */