subsystems/win32/win32k/ntuser/windc.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            subsystems/win32/win32k/ntuser/windc.c
   5  * PURPOSE:         Window DC management
   6  * COPYRIGHT:       Copyright 2007 ReactOS
   7  *
   8  */
   9
  10 /* INCLUDES ******************************************************************/
  11
  12 #include <w32k.h>
  13
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 int FASTCALL CLIPPING_UpdateGCRegion(DC* Dc);
  18
  19 /* GLOBALS *******************************************************************/
  20
  21 /* NOTE - I think we should store this per window station (including gdi objects) */
  22 /* Answer: No, use the DCE pMonitor to compare with! */
  23
  24 static LIST_ENTRY LEDce;
  25 static INT DCECount = 0; // Count of DCE in system.
  26
  27 #define DCX_CACHECOMPAREMASK (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | \
  28                               DCX_NORESETATTRS | DCX_LOCKWINDOWUPDATE | \
  29                               DCX_LAYEREDWIN | DCX_CACHE | DCX_WINDOW | \
  30                               DCX_PARENTCLIP)
  31
  32 /* FUNCTIONS *****************************************************************/
  33
  34 //
  35 // This should be moved to dc.c or dcutil.c.
  36 //
  37 HDC FASTCALL
  38 DceCreateDisplayDC(VOID)
  39 {
  40   HDC hDC;
  41   UNICODE_STRING DriverName;
  42   RtlInitUnicodeString(&DriverName, L"DISPLAY");
  43   hDC = IntGdiCreateDC(&DriverName, NULL, NULL, NULL, FALSE);
  44
  45   co_IntGraphicsCheck(TRUE);
  46
  47 //
  48 // If NULL, first time through! Build the default window dc!
  49 //
  50   if (hDC && !defaultDCstate) // Ultra HAX! Dedicated to GvG!
  51   { // This is a cheesy way to do this.
  52       PDC dc = DC_LockDc ( hDC );
  53       defaultDCstate = ExAllocatePoolWithTag(PagedPool, sizeof(DC), TAG_DC);
  54       RtlZeroMemory(defaultDCstate, sizeof(DC));
  55       defaultDCstate->pdcattr = &defaultDCstate->dcattr;
  56       DC_vCopyState(dc, defaultDCstate, TRUE);
  57       DC_UnlockDc( dc );
  58       InitializeListHead(&LEDce);
  59   }
  60   return hDC;
  61 }
  62
  63 static
  64 HRGN FASTCALL
  65 DceGetVisRgn(PWINDOW_OBJECT Window, ULONG Flags, HWND hWndChild, ULONG CFlags)
  66 {
  67   HRGN VisRgn;
  68
  69   VisRgn = VIS_ComputeVisibleRegion( Window,
  70                                      0 == (Flags & DCX_WINDOW),
  71                                      0 != (Flags & DCX_CLIPCHILDREN),
  72                                      0 != (Flags & DCX_CLIPSIBLINGS));
  73
  74   if (VisRgn == NULL)
  75       VisRgn = IntSysCreateRectRgn(0, 0, 0, 0);
  76
  77   return VisRgn;
  78 }
  79
  80 PDCE FASTCALL
  81 DceAllocDCE(PWINDOW_OBJECT Window OPTIONAL, DCE_TYPE Type)
  82 {
  83   PDCE pDce;
  84   PWND Wnd = NULL;
  85
  86   if (Window) Wnd = Window->Wnd;
  87
  88   pDce = ExAllocatePoolWithTag(PagedPool, sizeof(DCE), TAG_PDCE);
  89   if(!pDce)
  90         return NULL;
  91
  92   pDce->hDC = DceCreateDisplayDC();
  93   if (!pDce->hDC)
  94   {
  95       ExFreePoolWithTag(pDce, TAG_PDCE);
  96       return NULL;
  97   }
  98   DCECount++;
  99   DPRINT("Alloc DCE's! %d\n",DCECount);
 100   pDce->hwndCurrent = (Window ? Window->hSelf : NULL);
 101   pDce->pwndOrg  = Wnd;
 102   pDce->pwndClip = Wnd;
 103   pDce->hrgnClip = NULL;
 104   pDce->hrgnClipPublic = NULL;
 105   pDce->hrgnSavedVis = NULL;
 106   pDce->ppiOwner = NULL;
 107
 108   InsertTailList(&LEDce, &pDce->List);
 109
 110   DCU_SetDcUndeletable(pDce->hDC);
 111
 112   if (Type == DCE_WINDOW_DC || Type == DCE_CLASS_DC) //Window DCE have ownership.
 113   {
 114      pDce->ptiOwner = GetW32ThreadInfo();
 115   }
 116   else
 117   {
 118      DPRINT("FREE DCATTR!!!! NOT DCE_WINDOW_DC!!!!! hDC-> %x\n", pDce->hDC);
 119      IntGdiSetDCOwnerEx( pDce->hDC, GDI_OBJ_HMGR_NONE, FALSE);
 120      pDce->ptiOwner = NULL;
 121   }
 122
 123   if (Type == DCE_CACHE_DC)
 124   {
 125      pDce->DCXFlags = DCX_CACHE | DCX_DCEEMPTY;
 126   }
 127   else
 128   {
 129      pDce->DCXFlags = DCX_DCEBUSY;
 130      if (Wnd)
 131      {
 132         if (Type == DCE_WINDOW_DC)
 133         {
 134           if (Wnd->style & WS_CLIPCHILDREN) pDce->DCXFlags |= DCX_CLIPCHILDREN;
 135           if (Wnd->style & WS_CLIPSIBLINGS) pDce->DCXFlags |= DCX_CLIPSIBLINGS;
 136         }
 137      }
 138   }
 139   return(pDce);
 140 }
 141
 142 static VOID APIENTRY
 143 DceSetDrawable( PWINDOW_OBJECT Window OPTIONAL,
 144                 HDC hDC,
 145                 ULONG Flags,
 146                 BOOL SetClipOrigin)
 147 {
 148   PWND Wnd;
 149   DC *dc = DC_LockDc(hDC);
 150   if(!dc)
 151       return;
 152
 153   if (Window == NULL)
 154   {
 155       dc->ptlDCOrig.x = 0;
 156       dc->ptlDCOrig.y = 0;
 157   }
 158   else
 159   {
 160       Wnd = Window->Wnd;
 161       if (Flags & DCX_WINDOW)
 162       {
 163          dc->ptlDCOrig.x = Wnd->rcWindow.left;
 164          dc->ptlDCOrig.y = Wnd->rcWindow.top;
 165       }
 166       else
 167       {
 168          dc->ptlDCOrig.x = Wnd->rcClient.left;
 169          dc->ptlDCOrig.y = Wnd->rcClient.top;
 170       }
 171   }
 172   DC_UnlockDc(dc);
 173 }
 174
 175
 176 static VOID FASTCALL
 177 DceDeleteClipRgn(DCE* Dce)
 178 {
 179    Dce->DCXFlags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN);
 180
 181    if (Dce->DCXFlags & DCX_KEEPCLIPRGN )
 182    {
 183       Dce->DCXFlags &= ~DCX_KEEPCLIPRGN;
 184    }
 185    else if (Dce->hrgnClip != NULL)
 186    {
 187       GDIOBJ_FreeObjByHandle(Dce->hrgnClip, GDI_OBJECT_TYPE_REGION|GDI_OBJECT_TYPE_SILENT);
 188    }
 189
 190    Dce->hrgnClip = NULL;
 191
 192    /* make it dirty so that the vis rgn gets recomputed next time */
 193    Dce->DCXFlags |= DCX_DCEDIRTY;
 194 }
 195
 196 static INT FASTCALL
 197 DceReleaseDC(DCE* dce, BOOL EndPaint)
 198 {
 199    if (DCX_DCEBUSY != (dce->DCXFlags & (DCX_INDESTROY | DCX_DCEEMPTY | DCX_DCEBUSY)))
 200    {
 201       return 0;
 202    }
 203
 204    /* restore previous visible region */
 205    if ((dce->DCXFlags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) &&
 206          ((dce->DCXFlags & DCX_CACHE) || EndPaint))
 207    {
 208       DceDeleteClipRgn(dce);
 209    }
 210
 211    if (dce->DCXFlags & DCX_CACHE)
 212    {
 213       if (!(dce->DCXFlags & DCX_NORESETATTRS))
 214       {
 215          /* make the DC clean so that SetDCState doesn't try to update the vis rgn */
 216          IntGdiSetHookFlags(dce->hDC, DCHF_VALIDATEVISRGN);
 217
 218          // Clean the DC
 219          if (!IntGdiCleanDC(dce->hDC)) return 0;
 220
 221          if (dce->DCXFlags & DCX_DCEDIRTY)
 222          {
 223            /* don't keep around invalidated entries
 224             * because SetDCState() disables hVisRgn updates
 225             * by removing dirty bit. */
 226            dce->hwndCurrent = 0;
 227            dce->DCXFlags &= DCX_CACHE;
 228            dce->DCXFlags |= DCX_DCEEMPTY;
 229          }
 230       }
 231       dce->DCXFlags &= ~DCX_DCEBUSY;
 232       DPRINT("Exit!!!!! DCX_CACHE!!!!!!   hDC-> %x \n", dce->hDC);
 233       if (!IntGdiSetDCOwnerEx( dce->hDC, GDI_OBJ_HMGR_NONE, FALSE))
 234          return 0;
 235       dce->ptiOwner = NULL; // Reset ownership.
 236       dce->ppiOwner = NULL;
 237
 238 #if 0 // Need to research and fix before this is a "growing" issue.
 239       if (++DCECache > 32)
 240       {
 241          pLE = LEDce.Flink;
 242          pDCE = CONTAINING_RECORD(pLE, DCE, List);
 243          do
 244          {
 245             if (!(pDCE->DCXFlags & DCX_DCEBUSY))
 246             {  /* Free the unused cache DCEs. */
 247                pDCE = DceFreeDCE(pDCE, TRUE);
 248                if (!pDCE) break;
 249                continue;
 250             }
 251          }
 252          while (pLE != &LEDce );
 253       }
 254 #endif
 255    }
 256    return 1; // Released!
 257 }
 258
 259 static VOID FASTCALL
 260 DceUpdateVisRgn(DCE *Dce, PWINDOW_OBJECT Window, ULONG Flags)
 261 {
 262    HANDLE hRgnVisible = NULL;
 263    ULONG DcxFlags;
 264    PWINDOW_OBJECT DesktopWindow;
 265
 266    if (Flags & DCX_PARENTCLIP)
 267    {
 268       PWINDOW_OBJECT Parent;
 269       PWND ParentWnd;
 270
 271       Parent = Window->spwndParent;
 272       if(!Parent)
 273       {
 274          hRgnVisible = NULL;
 275          goto noparent;
 276       }
 277
 278       ParentWnd = Parent->Wnd;
 279
 280       if (ParentWnd->style & WS_CLIPSIBLINGS)
 281       {
 282          DcxFlags = DCX_CLIPSIBLINGS |
 283                     (Flags & ~(DCX_CLIPCHILDREN | DCX_WINDOW));
 284       }
 285       else
 286       {
 287          DcxFlags = Flags & ~(DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_WINDOW);
 288       }
 289       hRgnVisible = DceGetVisRgn(Parent, DcxFlags, Window->hSelf, Flags);
 290    }
 291    else if (Window == NULL)
 292    {
 293       DesktopWindow = UserGetWindowObject(IntGetDesktopWindow());
 294       if (NULL != DesktopWindow)
 295       {
 296          hRgnVisible = IntSysCreateRectRgnIndirect(&DesktopWindow->Wnd->rcWindow);
 297       }
 298       else
 299       {
 300          hRgnVisible = NULL;
 301       }
 302    }
 303    else
 304    {
 305       hRgnVisible = DceGetVisRgn(Window, Flags, 0, 0);
 306    }
 307
 308 noparent:
 309    if (Flags & DCX_INTERSECTRGN)
 310    {
 311       if(Dce->hrgnClip != NULL)
 312       {
 313          NtGdiCombineRgn(hRgnVisible, hRgnVisible, Dce->hrgnClip, RGN_AND);
 314       }
 315       else
 316       {
 317          if(hRgnVisible != NULL)
 318          {
 319             REGION_FreeRgnByHandle(hRgnVisible);
 320          }
 321          hRgnVisible = IntSysCreateRectRgn(0, 0, 0, 0);
 322       }
 323    }
 324    else if (Flags & DCX_EXCLUDERGN && Dce->hrgnClip != NULL)
 325    {
 326       NtGdiCombineRgn(hRgnVisible, hRgnVisible, Dce->hrgnClip, RGN_DIFF);
 327    }
 328
 329    Dce->DCXFlags &= ~DCX_DCEDIRTY;
 330    GdiSelectVisRgn(Dce->hDC, hRgnVisible);
 331
 332    if (Window != NULL)
 333    {
 334       IntEngWindowChanged(Window, WOC_RGN_CLIENT);
 335    }
 336
 337    if (hRgnVisible != NULL)
 338    {
 339       REGION_FreeRgnByHandle(hRgnVisible);
 340    }
 341 }
 342
 343 HDC FASTCALL
 344 UserGetDCEx(PWINDOW_OBJECT Window OPTIONAL, HANDLE ClipRegion, ULONG Flags)
 345 {
 346    PWINDOW_OBJECT Parent;
 347    ULONG DcxFlags;
 348    DCE* Dce = NULL;
 349    BOOL UpdateClipOrigin = FALSE;
 350    PWND Wnd = NULL;
 351    HDC hDC = NULL;
 352    PPROCESSINFO ppi;
 353    PLIST_ENTRY pLE;
 354
 355    if (NULL == Window)
 356    {
 357       Flags &= ~DCX_USESTYLE;
 358       Flags |= DCX_CACHE;
 359    }
 360    else
 361        Wnd = Window->Wnd;
 362
 363    if (Flags & (DCX_WINDOW | DCX_PARENTCLIP)) Flags |= DCX_CACHE;
 364
 365    // When GetDC is called with hWnd nz, DCX_CACHE & _WINDOW are clear w _USESTYLE set.
 366    if (Flags & DCX_USESTYLE)
 367    {
 368       Flags &= ~(DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
 369       if (!(Flags & DCX_WINDOW)) // not window rectangle
 370       {
 371          if (Wnd->pcls->style & CS_PARENTDC)
 372          {
 373             Flags |= DCX_PARENTCLIP;
 374          }
 375
 376          if (!(Flags & DCX_CACHE) && // Not on the cheap wine list.
 377              !(Wnd->pcls->style & CS_OWNDC) )
 378          {
 379             if (!(Wnd->pcls->style & CS_CLASSDC))
 380             // The window is not POWNED or has any CLASS, so we are looking for cheap wine.
 381                Flags |= DCX_CACHE;
 382             else
 383             {
 384                if (Wnd->pcls->pdce) hDC = ((PDCE)Wnd->pcls->pdce)->hDC;
 385                DPRINT("We have CLASS!!\n");
 386             }
 387          }
 388 /*         else // For Testing!
 389          {
 390             DPRINT1("We have POWNER!!\n");
 391             if (Window->Dce) DPRINT1("We have POWNER with DCE!!\n");
 392          }
 393 */
 394          if (Wnd->style & WS_CLIPSIBLINGS)
 395          {
 396             Flags |= DCX_CLIPSIBLINGS;
 397          }
 398
 399          if (Wnd->style & WS_CLIPCHILDREN &&
 400              !(Wnd->style & WS_MINIMIZE))
 401          {
 402             Flags |= DCX_CLIPCHILDREN;
 403          }
 404          /* If minized with icon in the set, we are forced to be cheap! */
 405          if (Wnd->style & WS_MINIMIZE &&
 406              Wnd->pcls->hIcon)
 407          {
 408             Flags |= DCX_CACHE;
 409          }
 410       }
 411       else
 412       {
 413          if (Wnd->style & WS_CLIPSIBLINGS) Flags |= DCX_CLIPSIBLINGS;
 414          Flags |= DCX_CACHE;
 415       }
 416    }
 417
 418    if (Flags & DCX_WINDOW) Flags &= ~DCX_CLIPCHILDREN;
 419
 420    if (Flags & DCX_NOCLIPCHILDREN)
 421    {
 422       Flags |= DCX_CACHE;
 423       Flags &= ~(DCX_PARENTCLIP | DCX_CLIPCHILDREN);
 424    }
 425
 426    Parent = (Window ? Window->spwndParent : NULL);
 427
 428    if (NULL == Window || !(Wnd->style & WS_CHILD) || NULL == Parent)
 429    {
 430       Flags &= ~DCX_PARENTCLIP;
 431       Flags |= DCX_CLIPSIBLINGS;
 432    }
 433
 434    /* it seems parent clip is ignored when clipping siblings or children */
 435    if (Flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) Flags &= ~DCX_PARENTCLIP;
 436
 437    if (Flags & DCX_PARENTCLIP)
 438    {
 439       if ((Wnd->style & WS_VISIBLE) &&
 440           (Parent->Wnd->style & WS_VISIBLE))
 441       {
 442          Flags &= ~DCX_CLIPCHILDREN;
 443          if (Parent->Wnd->style & WS_CLIPSIBLINGS)
 444          {
 445             Flags |= DCX_CLIPSIBLINGS;
 446          }
 447       }
 448    }
 449
 450    // Window nz, check to see if we still own this or it is just cheap wine tonight.
 451    if (!(Flags & DCX_CACHE))
 452    {
 453       if ( Wnd->head.pti != GetW32ThreadInfo())
 454          Flags |= DCX_CACHE; // Ah~ Not Powned! Forced to be cheap~
 455    }
 456
 457    DcxFlags = Flags & DCX_CACHECOMPAREMASK;
 458
 459    if (Flags & DCX_CACHE)
 460    { // Scan the cheap wine list for our match.
 461       DCE* DceEmpty = NULL;
 462       DCE* DceUnused = NULL;
 463       KeEnterCriticalRegion();
 464       pLE = LEDce.Flink;
 465       Dce = CONTAINING_RECORD(pLE, DCE, List);
 466       do
 467       {
 468 // The reason for this you may ask?
 469 // Well, it seems ReactOS calls GetDC with out first creating a desktop DC window!
 470 // Need to test for null here. Not sure if this is a bug or a feature.
 471 // First time use hax, need to use DceAllocDCE during window display init.
 472          if (!Dce) break;
 473 //
 474 // The way I understand this, you can have more than one DC per window.
 475 // Only one Owned if one was requested and saved and one Cached.
 476 //
 477          if ((Dce->DCXFlags & (DCX_CACHE | DCX_DCEBUSY)) == DCX_CACHE)
 478          {
 479             DceUnused = Dce;
 480             if (Dce->DCXFlags & DCX_DCEEMPTY)
 481             {
 482                DceEmpty = Dce;
 483             }
 484             else if (Dce->hwndCurrent == (Window ? Window->hSelf : NULL) &&
 485                      ((Dce->DCXFlags & DCX_CACHECOMPAREMASK) == DcxFlags))
 486             {
 487                UpdateClipOrigin = TRUE;
 488                break;
 489             }
 490          }
 491          pLE = Dce->List.Flink;
 492          Dce = CONTAINING_RECORD(pLE, DCE, List);
 493       }
 494       while (pLE != &LEDce);
 495       KeLeaveCriticalRegion();
 496
 497       Dce = (DceEmpty == NULL) ? DceUnused : DceEmpty;
 498
 499       if (Dce == NULL)
 500       {
 501          Dce = DceAllocDCE(NULL, DCE_CACHE_DC);
 502       }
 503       if (!Dce) return NULL;
 504
 505       Dce->hwndCurrent = (Window ? Window->hSelf : NULL);
 506    }
 507    else // If we are here, we are POWNED or having CLASS.
 508    {
 509       KeEnterCriticalRegion();
 510       pLE = LEDce.Flink;
 511       Dce = CONTAINING_RECORD(pLE, DCE, List);
 512       do
 513       {   // Check for Window handle than HDC match for CLASS.
 514           if ((Dce->hwndCurrent == Window->hSelf) ||
 515               (Dce->hDC == hDC))
 516              break;
 517           pLE = Dce->List.Flink;
 518           Dce = CONTAINING_RECORD(pLE, DCE, List);
 519       }
 520       while (pLE != &LEDce);
 521       KeLeaveCriticalRegion();
 522
 523       if ( (Flags & (DCX_INTERSECTRGN|DCX_EXCLUDERGN)) &&
 524            (Dce->DCXFlags & (DCX_INTERSECTRGN|DCX_EXCLUDERGN)) )
 525       {
 526           DceDeleteClipRgn(Dce);
 527       }
 528    }
 529 // First time use hax, need to use DceAllocDCE during window display init.
 530    if (NULL == Dce)
 531    {
 532       return(NULL);
 533    }
 534
 535    if (!GDIOBJ_ValidateHandle(Dce->hDC, GDI_OBJECT_TYPE_DC))
 536    {
 537       DPRINT1("FIXME: Got DCE with invalid hDC! 0x%x\n", Dce->hDC);
 538       Dce->hDC = DceCreateDisplayDC();
 539       /* FIXME: Handle error */
 540    }
 541
 542    Dce->DCXFlags = Flags | DCX_DCEBUSY;
 543
 544    /*
 545       Bump it up! This prevents the random errors in wine dce tests and with
 546       proper bits set in DCX_CACHECOMPAREMASK.
 547       Reference:
 548         http://www.reactos.org/archives/public/ros-dev/2008-July/010498.html
 549         http://www.reactos.org/archives/public/ros-dev/2008-July/010499.html
 550     */
 551    if (pLE != &LEDce)
 552    {
 553       RemoveEntryList(&Dce->List);
 554       InsertHeadList(&LEDce, &Dce->List);
 555    }
 556
 557    /* Introduced in rev 6691 and modified later. */
 558    if ( (Flags & DCX_INTERSECTUPDATE) && !ClipRegion )
 559    {
 560       Flags |= DCX_INTERSECTRGN | DCX_KEEPCLIPRGN;
 561       Dce->DCXFlags |= DCX_INTERSECTRGN | DCX_KEEPCLIPRGN;
 562       ClipRegion = Window->hrgnUpdate;
 563    }
 564
 565    if (ClipRegion == (HRGN) 1)
 566    {
 567       if (!(Flags & DCX_WINDOW))
 568       {
 569          Dce->hrgnClip = IntSysCreateRectRgnIndirect(&Window->Wnd->rcClient);
 570       }
 571       else
 572       {
 573          Dce->hrgnClip = IntSysCreateRectRgnIndirect(&Window->Wnd->rcWindow);
 574       }
 575       Dce->DCXFlags &= ~DCX_KEEPCLIPRGN;
 576    }
 577    else if (ClipRegion != NULL)
 578    {
 579       if (Dce->hrgnClip != NULL)
 580       {
 581          DPRINT1("Should not be called!!\n");
 582          GDIOBJ_FreeObjByHandle(Dce->hrgnClip, GDI_OBJECT_TYPE_REGION|GDI_OBJECT_TYPE_SILENT);
 583          Dce->hrgnClip = NULL;
 584       }
 585       Dce->hrgnClip = ClipRegion;
 586    }
 587
 588    DceSetDrawable(Window, Dce->hDC, Flags, UpdateClipOrigin);
 589
 590    DceUpdateVisRgn(Dce, Window, Flags);
 591
 592    if (Dce->DCXFlags & DCX_CACHE)
 593    {
 594       DPRINT("ENTER!!!!!! DCX_CACHE!!!!!!   hDC-> %x\n", Dce->hDC);
 595       // Need to set ownership so Sync dcattr will work.
 596       IntGdiSetDCOwnerEx( Dce->hDC, GDI_OBJ_HMGR_POWNED, FALSE);
 597       Dce->ptiOwner = GetW32ThreadInfo(); // Set the temp owning
 598    }
 599
 600    if ( Wnd &&
 601         Wnd->ExStyle & WS_EX_LAYOUTRTL &&
 602        !(Flags & DCX_KEEPLAYOUT) )
 603    {
 604       NtGdiSetLayout(Dce->hDC, -1, LAYOUT_RTL);
 605    }
 606
 607    if (Dce->DCXFlags & DCX_PROCESSOWNED)
 608    {
 609       ppi = PsGetCurrentProcessWin32Process();
 610       ppi->W32PF_flags |= W32PF_OWNDCCLEANUP;
 611       Dce->ptiOwner = NULL;
 612       Dce->ppiOwner = ppi;
 613    }
 614
 615    return(Dce->hDC);
 616 }
 617
 618 /***********************************************************************
 619  *           DceFreeDCE
 620  */
 621 PDCE FASTCALL
 622 DceFreeDCE(PDCE pdce, BOOLEAN Force)
 623 {
 624   DCE *ret;
 625   PLIST_ENTRY pLE;
 626   BOOL Hit = FALSE;
 627
 628   if (NULL == pdce) return NULL;
 629
 630   pLE = pdce->List.Flink;
 631   ret = CONTAINING_RECORD(pLE, DCE, List);
 632
 633   pdce->DCXFlags |= DCX_INDESTROY;
 634
 635   if (Force && !GDIOBJ_OwnedByCurrentProcess(pdce->hDC))
 636   {
 637      DPRINT("Change ownership for DCE! -> %x\n" , pdce);
 638      // Note: Windows sets W32PF_OWNDCCLEANUP and moves on.
 639      if (!IsObjectDead((HGDIOBJ) pdce->hDC))
 640      {
 641          DC_SetOwnership( pdce->hDC, PsGetCurrentProcess());
 642      }
 643      else
 644      {
 645          DPRINT1("Attempted to change ownership of an DCEhDC 0x%x currently being destroyed!!!\n",pdce->hDC);
 646          Hit = TRUE;
 647      }
 648   }
 649
 650   if (!Hit) IntGdiDeleteDC(pdce->hDC, TRUE);
 651
 652   if (pdce->hrgnClip && !(pdce->DCXFlags & DCX_KEEPCLIPRGN))
 653   {
 654       GDIOBJ_FreeObjByHandle(pdce->hrgnClip, GDI_OBJECT_TYPE_REGION|GDI_OBJECT_TYPE_SILENT);
 655       pdce->hrgnClip = NULL;
 656   }
 657
 658   RemoveEntryList(&pdce->List);
 659
 660   if (IsListEmpty(&pdce->List))
 661   {
 662       DPRINT1("List is Empty! DCE! -> %x\n" , pdce);
 663       return NULL;
 664   }
 665
 666   ExFreePoolWithTag(pdce, TAG_PDCE);
 667
 668   DCECount--;
 669   DPRINT("Freed DCE's! %d \n", DCECount);
 670
 671   return ret;
 672 }
 673
 674 /***********************************************************************
 675  *           DceFreeWindowDCE
 676  *
 677  * Remove owned DCE and reset unreleased cache DCEs.
 678  */
 679 void FASTCALL
 680 DceFreeWindowDCE(PWINDOW_OBJECT Window)
 681 {
 682   PDCE pDCE;
 683   PLIST_ENTRY pLE;
 684
 685   if (DCECount <= 0)
 686   {
 687      DPRINT1("FreeWindowDCE No Entry! %d\n",DCECount);
 688      return;
 689   }
 690
 691   pLE = LEDce.Flink;
 692   pDCE = CONTAINING_RECORD(pLE, DCE, List);
 693   do
 694   {
 695      if (!pDCE)
 696      {
 697         DPRINT1("FreeWindowDCE No DCE Pointer!\n");
 698         break;
 699      }
 700      if (IsListEmpty(&pDCE->List))
 701      {
 702         DPRINT1("FreeWindowDCE List is Empty!!!!\n");
 703         break;
 704      }
 705      if ( pDCE->hwndCurrent == Window->hSelf &&
 706           !(pDCE->DCXFlags & DCX_DCEEMPTY) )
 707      {
 708         if (!(pDCE->DCXFlags & DCX_CACHE)) /* owned or Class DCE*/
 709         {
 710            if (Window->Wnd->pcls->style & CS_CLASSDC) /* Test Class first */
 711            {
 712               if (pDCE->DCXFlags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) /* Class DCE*/
 713                  DceDeleteClipRgn(pDCE);
 714               // Update and reset Vis Rgn and clear the dirty bit.
 715               // Should release VisRgn than reset it to default.
 716               DceUpdateVisRgn(pDCE, Window, pDCE->DCXFlags);
 717               pDCE->DCXFlags = DCX_DCEEMPTY|DCX_CACHE;
 718               pDCE->hwndCurrent = 0;
 719
 720               DPRINT("POWNED DCE going Cheap!! DCX_CACHE!! hDC-> %x \n", pDCE->hDC);
 721               if (!IntGdiSetDCOwnerEx( pDCE->hDC, GDI_OBJ_HMGR_NONE, FALSE))
 722               {
 723                   DPRINT1("Fail Owner Switch hDC-> %x \n", pDCE->hDC);
 724                   break;
 725               }
 726               /* Do not change owner so thread can clean up! */
 727            }
 728            else if (Window->Wnd->pcls->style & CS_OWNDC) /* owned DCE*/
 729            {
 730               pDCE = DceFreeDCE(pDCE, FALSE);
 731               if (!pDCE) break;
 732               continue;
 733            }
 734            else
 735            {
 736               DPRINT1("Not POWNED or CLASSDC hwndCurrent -> %x \n", pDCE->hwndCurrent);
 737               ASSERT(FALSE);
 738            }
 739         }
 740         else
 741         {
 742            if (pDCE->DCXFlags & DCX_DCEBUSY) /* shared cache DCE */
 743            {
 744               /* FIXME: AFAICS we are doing the right thing here so
 745                * this should be a DPRINT. But this is best left as an ERR
 746                * because the 'application error' is likely to come from
 747                * another part of Wine (i.e. it's our fault after all).
 748                * We should change this to DPRINT when ReactOS is more stable
 749                * (for 1.0?).
 750                */
 751               DPRINT1("[%p] GetDC() without ReleaseDC()!\n", Window->hSelf);
 752               DceReleaseDC(pDCE, FALSE);
 753            }
 754            pDCE->DCXFlags |= DCX_DCEEMPTY;
 755            pDCE->hwndCurrent = 0;
 756         }
 757      }
 758      pLE = pDCE->List.Flink;
 759      pDCE = CONTAINING_RECORD(pLE, DCE, List);
 760   }
 761   while (pLE != &LEDce);
 762 }
 763
 764 void FASTCALL
 765 DceFreeClassDCE(HDC hDC)
 766 {
 767    PDCE pDCE;
 768    PLIST_ENTRY pLE;
 769    pLE = LEDce.Flink;
 770    pDCE = CONTAINING_RECORD(pLE, DCE, List);
 771
 772    do
 773    {
 774        if(!pDCE) break;
 775        if (pDCE->hDC == hDC)
 776        {
 777           pDCE = DceFreeDCE(pDCE, TRUE); // Might have gone cheap!
 778           if (!pDCE) break;
 779           continue;
 780        }
 781        pLE = pDCE->List.Flink;
 782        pDCE = CONTAINING_RECORD(pLE, DCE, List);
 783    }
 784    while (pLE != &LEDce);
 785 }
 786
 787 void FASTCALL
 788 DceFreeThreadDCE(PTHREADINFO pti)
 789 {
 790    PDCE pDCE;
 791    PLIST_ENTRY pLE;
 792    pLE = LEDce.Flink;
 793    pDCE = CONTAINING_RECORD(pLE, DCE, List);
 794
 795    do
 796    {
 797        if(!pDCE) break;
 798        if (pDCE->ptiOwner == pti)
 799        {
 800           if (pDCE->DCXFlags & DCX_CACHE)
 801           {
 802              pDCE = DceFreeDCE(pDCE, TRUE);
 803              if (!pDCE) break;
 804              continue;
 805           }
 806        }
 807        pLE = pDCE->List.Flink;
 808        pDCE = CONTAINING_RECORD(pLE, DCE, List);
 809    }
 810    while (pLE != &LEDce);
 811 }
 812
 813 VOID FASTCALL
 814 DceEmptyCache(VOID)
 815 {
 816    PDCE pDCE;
 817    PLIST_ENTRY pLE;
 818    pLE = LEDce.Flink;
 819    pDCE = CONTAINING_RECORD(pLE, DCE, List);
 820
 821    do
 822    {
 823       if(!pDCE) break;
 824       pDCE = DceFreeDCE(pDCE, TRUE);
 825       if(!pDCE) break;
 826    }
 827    while (pLE != &LEDce);
 828 }
 829
 830 VOID FASTCALL
 831 DceResetActiveDCEs(PWINDOW_OBJECT Window)
 832 {
 833    DCE *pDCE;
 834    PDC dc;
 835    PWINDOW_OBJECT CurrentWindow;
 836    INT DeltaX;
 837    INT DeltaY;
 838    PLIST_ENTRY pLE;
 839
 840    if (NULL == Window)
 841    {
 842       return;
 843    }
 844    pLE = LEDce.Flink;
 845    pDCE = CONTAINING_RECORD(pLE, DCE, List);
 846    if(!pDCE) return; // Another null test!
 847    do
 848    {
 849       if(!pDCE) break;
 850       if(pLE == &LEDce) break;
 851       if (0 == (pDCE->DCXFlags & (DCX_DCEEMPTY|DCX_INDESTROY)))
 852       {
 853          if (Window->hSelf == pDCE->hwndCurrent)
 854          {
 855             CurrentWindow = Window;
 856          }
 857          else
 858          {
 859             CurrentWindow = UserGetWindowObject(pDCE->hwndCurrent);
 860             if (NULL == CurrentWindow)
 861             {
 862                pLE = pDCE->List.Flink;
 863                pDCE = CONTAINING_RECORD(pLE, DCE, List);
 864                continue;
 865             }
 866          }
 867
 868          if (!GDIOBJ_ValidateHandle(pDCE->hDC, GDI_OBJECT_TYPE_DC) ||
 869              (dc = DC_LockDc(pDCE->hDC)) == NULL)
 870          {
 871             pLE = pDCE->List.Flink;
 872             pDCE = CONTAINING_RECORD(pLE, DCE, List);
 873             continue;
 874          }
 875          if (Window == CurrentWindow || IntIsChildWindow(Window, CurrentWindow))
 876          {
 877             if (pDCE->DCXFlags & DCX_WINDOW)
 878             {
 879                DeltaX = CurrentWindow->Wnd->rcWindow.left - dc->ptlDCOrig.x;
 880                DeltaY = CurrentWindow->Wnd->rcWindow.top - dc->ptlDCOrig.y;
 881                dc->ptlDCOrig.x = CurrentWindow->Wnd->rcWindow.left;
 882                dc->ptlDCOrig.y = CurrentWindow->Wnd->rcWindow.top;
 883             }
 884             else
 885             {
 886                DeltaX = CurrentWindow->Wnd->rcClient.left - dc->ptlDCOrig.x;
 887                DeltaY = CurrentWindow->Wnd->rcClient.top - dc->ptlDCOrig.y;
 888                dc->ptlDCOrig.x = CurrentWindow->Wnd->rcClient.left;
 889                dc->ptlDCOrig.y = CurrentWindow->Wnd->rcClient.top;
 890             }
 891             if (NULL != dc->rosdc.hClipRgn)
 892             {
 893                NtGdiOffsetRgn(dc->rosdc.hClipRgn, DeltaX, DeltaY);
 894                CLIPPING_UpdateGCRegion(dc);
 895             }
 896             if (NULL != pDCE->hrgnClip)
 897             {
 898                NtGdiOffsetRgn(pDCE->hrgnClip, DeltaX, DeltaY);
 899             }
 900          }
 901          DC_UnlockDc(dc);
 902
 903          DceUpdateVisRgn(pDCE, CurrentWindow, pDCE->DCXFlags);
 904
 905          if (Window->hSelf != pDCE->hwndCurrent)
 906          {
 907 //            IntEngWindowChanged(CurrentWindow, WOC_RGN_CLIENT);
 908 //            UserDerefObject(CurrentWindow);
 909          }
 910       }
 911       pLE = pDCE->List.Flink;
 912       pDCE = CONTAINING_RECORD(pLE, DCE, List);
 913    }
 914    while (pLE != &LEDce);
 915 }
 916
 917 HWND FASTCALL
 918 IntWindowFromDC(HDC hDc)
 919 {
 920   DCE *Dce;
 921   PLIST_ENTRY pLE;
 922   HWND Ret = NULL;
 923
 924   pLE = LEDce.Flink;
 925   Dce = CONTAINING_RECORD(pLE, DCE, List);
 926   do
 927   {
 928       if (Dce->hDC == hDc)
 929       {
 930          if (Dce->DCXFlags & DCX_INDESTROY)
 931             Ret = NULL;
 932          else
 933             Ret = Dce->hwndCurrent;
 934          break;
 935       }
 936       pLE = Dce->List.Flink;
 937       Dce = CONTAINING_RECORD(pLE, DCE, List);
 938   }
 939   while (pLE != &LEDce);
 940   return Ret;
 941 }
 942
 943 INT FASTCALL
 944 UserReleaseDC(PWINDOW_OBJECT Window, HDC hDc, BOOL EndPaint)
 945 {
 946   PDCE dce;
 947   PLIST_ENTRY pLE;
 948   INT nRet = 0;
 949   BOOL Hit = FALSE;
 950
 951   DPRINT("%p %p\n", Window, hDc);
 952   pLE = LEDce.Flink;
 953   dce = CONTAINING_RECORD(pLE, DCE, List);
 954   do
 955   {
 956      if(!dce) break;
 957      if (dce->hDC == hDc)
 958      {
 959         Hit = TRUE;
 960         break;
 961      }
 962      pLE = dce->List.Flink;
 963      dce = CONTAINING_RECORD(pLE, DCE, List);
 964   }
 965   while (pLE != &LEDce );
 966
 967   if ( Hit && (dce->DCXFlags & DCX_DCEBUSY))
 968   {
 969      nRet = DceReleaseDC(dce, EndPaint);
 970   }
 971
 972   return nRet;
 973 }
 974
 975 HDC FASTCALL
 976 UserGetWindowDC(PWINDOW_OBJECT Wnd)
 977 {
 978   return UserGetDCEx(Wnd, 0, DCX_USESTYLE | DCX_WINDOW);
 979 }
 980
 981 HWND FASTCALL
 982 UserGethWnd( HDC hdc, PWNDOBJ *pwndo)
 983 {
 984   PWNDGDI pWndgdi;
 985   PWINDOW_OBJECT Wnd;
 986   HWND hWnd;
 987
 988   hWnd = IntWindowFromDC(hdc);
 989
 990   if (hWnd && !(Wnd = UserGetWindowObject(hWnd)))
 991   {
 992      pWndgdi = (WNDGDI *)IntGetProp(Wnd, AtomWndObj);
 993
 994      if ( pWndgdi && pWndgdi->Hwnd == hWnd )
 995      {
 996         if (pwndo) *pwndo = (PWNDOBJ)pWndgdi;
 997      }
 998   }
 999   return hWnd;
1000 }
1001
1002 HDC APIENTRY
1003 NtUserGetDCEx(HWND hWnd OPTIONAL, HANDLE ClipRegion, ULONG Flags)
1004 {
1005   PWINDOW_OBJECT Wnd=NULL;
1006   DECLARE_RETURN(HDC);
1007
1008   DPRINT("Enter NtUserGetDCEx\n");
1009   UserEnterExclusive();
1010
1011   if (hWnd && !(Wnd = UserGetWindowObject(hWnd)))
1012   {
1013       RETURN(NULL);
1014   }
1015   RETURN( UserGetDCEx(Wnd, ClipRegion, Flags));
1016
1017 CLEANUP:
1018   DPRINT("Leave NtUserGetDCEx, ret=%i\n",_ret_);
1019   UserLeave();
1020   END_CLEANUP;
1021 }
1022
1023 /*
1024  * NtUserGetWindowDC
1025  *
1026  * The NtUserGetWindowDC function retrieves the device context (DC) for the
1027  * entire window, including title bar, menus, and scroll bars. A window device
1028  * context permits painting anywhere in a window, because the origin of the
1029  * device context is the upper-left corner of the window instead of the client
1030  * area.
1031  *
1032  * Status
1033  *    @implemented
1034  */
1035 HDC APIENTRY
1036 NtUserGetWindowDC(HWND hWnd)
1037 {
1038   return NtUserGetDCEx(hWnd, 0, DCX_USESTYLE | DCX_WINDOW);
1039 }
1040
1041 HDC APIENTRY
1042 NtUserGetDC(HWND hWnd)
1043 {
1044  DPRINT("NtUGetDC -> %x:%x\n", hWnd, !hWnd ? DCX_CACHE | DCX_WINDOW : DCX_USESTYLE );
1045
1046   return NtUserGetDCEx(hWnd, NULL, NULL == hWnd ? DCX_CACHE | DCX_WINDOW : DCX_USESTYLE);
1047 }
1048
1049 /*!
1050  * Select logical palette into device context.
1051  * \param       hDC                             handle to the device context
1052  * \param       hpal                            handle to the palette
1053  * \param       ForceBackground         If this value is FALSE the logical palette will be copied to the device palette only when the applicatioon
1054  *                                                              is in the foreground. If this value is TRUE then map the colors in the logical palette to the device
1055  *                                                              palette colors in the best way.
1056  * \return      old palette
1057  *
1058  * \todo        implement ForceBackground == TRUE
1059 */
1060 HPALETTE
1061 APIENTRY
1062 NtUserSelectPalette(HDC  hDC,
1063               HPALETTE  hpal,
1064        BOOL  ForceBackground)
1065 {
1066     HPALETTE oldPal;
1067     UserEnterExclusive();
1068     // Implement window checks
1069     oldPal = GdiSelectPalette( hDC, hpal, ForceBackground);
1070     UserLeave();
1071     return oldPal;
1072 }
1073
1074
1075 /* EOF */