windc.c File Reference

#include <win32k.h>

Include dependency graph for windc.c:

Go to the source code of this file.

Macros
#define	DCX_CACHECOMPAREMASK

Functions
	DBG_DEFAULT_CHANNEL (UserDce)
INIT_FUNCTION NTSTATUS NTAPI	InitDCEImpl (VOID)
HDC FASTCALL	DceCreateDisplayDC (VOID)
DCE *FASTCALL	DceGetDceFromDC (HDC hdc)
static PREGION FASTCALL	DceGetVisRgn (PWND Window, ULONG Flags, HWND hWndChild, ULONG CFlags)
PDCE FASTCALL	DceAllocDCE (PWND Window OPTIONAL, DCE_TYPE Type)
static VOID APIENTRY	DceSetDrawable (PWND Window OPTIONAL, HDC hDC, ULONG Flags, BOOL SetClipOrigin)
static VOID FASTCALL	DceDeleteClipRgn (DCE *Dce)
VOID FASTCALL	DceUpdateVisRgn (DCE *Dce, PWND Window, ULONG Flags)
static INT FASTCALL	DceReleaseDC (DCE *dce, BOOL EndPaint)
HDC FASTCALL	UserGetDCEx (PWND Wnd OPTIONAL, HANDLE ClipRegion, ULONG Flags)
void FASTCALL	DceFreeDCE (PDCE pdce, BOOLEAN Force)
void FASTCALL	DceFreeWindowDCE (PWND Window)
void FASTCALL	DceFreeClassDCE (PDCE pdceClass)
void FASTCALL	DceFreeThreadDCE (PTHREADINFO pti)
VOID FASTCALL	DceEmptyCache (VOID)
VOID FASTCALL	DceResetActiveDCEs (PWND Window)
HWND FASTCALL	IntWindowFromDC (HDC hDc)
INT FASTCALL	UserReleaseDC (PWND Window, HDC hDc, BOOL EndPaint)
HDC FASTCALL	UserGetWindowDC (PWND Wnd)
HWND FASTCALL	UserGethWnd (HDC hdc, PWNDOBJ *pwndo)
HDC APIENTRY	NtUserGetDCEx (HWND hWnd OPTIONAL, HANDLE ClipRegion, ULONG Flags)
HDC APIENTRY	NtUserGetWindowDC (HWND hWnd)
HDC APIENTRY	NtUserGetDC (HWND hWnd)
HPALETTE APIENTRY	NtUserSelectPalette (HDC hDC, HPALETTE hpal, BOOL ForceBackground)

Variables
static LIST_ENTRY	LEDce
static INT	DCECount = 0

Macro Definition Documentation

DCX_CACHECOMPAREMASK

#define DCX_CACHECOMPAREMASK

Value:

(DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | \
                              DCX_NORESETATTRS | DCX_LOCKWINDOWUPDATE | \
                              DCX_LAYEREDWIN | DCX_CACHE | DCX_WINDOW | \
                              DCX_PARENTCLIP)

Definition at line 20 of file windc.c.

Function Documentation

DBG_DEFAULT_CHANNEL()

DBG_DEFAULT_CHANNEL

(

UserDce

)

DceAllocDCE()

PDCE FASTCALL DceAllocDCE	(	PWND Window	OPTIONAL,
		DCE_TYPE	Type
	)

Definition at line 85 of file windc.c.

{
  PDCE pDce;

  pDce = ExAllocatePoolWithTag(PagedPool, sizeof(DCE), USERTAG_DCE);
  if(!pDce)
        return NULL;

  pDce->hDC = DceCreateDisplayDC();
  if (!pDce->hDC)
  {
      ExFreePoolWithTag(pDce, USERTAG_DCE);
      return NULL;
  }
  DCECount++;
  TRACE("Alloc DCE's! %d\n",DCECount);
  pDce->hwndCurrent = (Window ? Window->head.h : NULL);
  pDce->pwndOrg  = Window;
  pDce->pwndClip = Window;
  pDce->hrgnClip = NULL;
  pDce->hrgnClipPublic = NULL;
  pDce->hrgnSavedVis = NULL;
  pDce->ppiOwner = NULL;

  InsertTailList(&LEDce, &pDce->List);

  DCU_SetDcUndeletable(pDce->hDC);

  if (Type == DCE_WINDOW_DC || Type == DCE_CLASS_DC) // Window DCE have ownership.
  {
     pDce->ptiOwner = GetW32ThreadInfo();
  }
  else
  {
     TRACE("FREE DCATTR!!!! NOT DCE_WINDOW_DC!!!!! hDC-> %p\n", pDce->hDC);
     GreSetDCOwner(pDce->hDC, GDI_OBJ_HMGR_NONE);
     pDce->ptiOwner = NULL;
  }

  if (Type == DCE_CACHE_DC)
  {
     pDce->DCXFlags = DCX_CACHE | DCX_DCEEMPTY;
  }
  else
  {
     pDce->DCXFlags = DCX_DCEBUSY;
     if (Window)
     {
        if (Type == DCE_WINDOW_DC)
        {
          if (Window->style & WS_CLIPCHILDREN) pDce->DCXFlags |= DCX_CLIPCHILDREN;
          if (Window->style & WS_CLIPSIBLINGS) pDce->DCXFlags |= DCX_CLIPSIBLINGS;
        }
     }
  }
  return(pDce);
}

Referenced by IntCreateWindow(), and UserGetDCEx().

DceCreateDisplayDC()

HDC FASTCALL DceCreateDisplayDC

(

VOID

)

Definition at line 40 of file windc.c.

{
  UNICODE_STRING DriverName = RTL_CONSTANT_STRING(L"DISPLAY");

  co_IntGraphicsCheck(TRUE);

  return IntGdiCreateDC(&DriverName, NULL, NULL, NULL, FALSE);
}

Referenced by DceAllocDCE(), and UserGetDCEx().

DceDeleteClipRgn()

static VOID FASTCALL DceDeleteClipRgn ( DCE *  Dce )

static

Definition at line 169 of file windc.c.

{
   Dce->DCXFlags &= ~(DCX_EXCLUDERGN | DCX_INTERSECTRGN);

   if (Dce->DCXFlags & DCX_KEEPCLIPRGN )
   {
      Dce->DCXFlags &= ~DCX_KEEPCLIPRGN;
   }
   else if (Dce->hrgnClip != NULL)
   {
      GreDeleteObject(Dce->hrgnClip);
   }

   Dce->hrgnClip = NULL;

   /* Make it dirty so that the vis rgn gets recomputed next time */
   Dce->DCXFlags |= DCX_DCEDIRTY;
   IntGdiSetHookFlags(Dce->hDC, DCHF_INVALIDATEVISRGN);
}

Referenced by DceFreeWindowDCE(), DceReleaseDC(), and UserGetDCEx().

DceEmptyCache()

VOID FASTCALL DceEmptyCache

(

VOID

)

Definition at line 800 of file windc.c.

{
   PDCE pDCE;
   PLIST_ENTRY ListEntry;

   ListEntry = LEDce.Flink;
   while (ListEntry != &LEDce)
   {
      pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
      ListEntry = ListEntry->Flink;
      DceFreeDCE(pDCE, TRUE);
   }
}

DceFreeClassDCE()

void FASTCALL DceFreeClassDCE

(

PDCE

pdceClass

)

Definition at line 761 of file windc.c.

{
   PDCE pDCE;
   PLIST_ENTRY ListEntry;

   ListEntry = LEDce.Flink;
   while (ListEntry != &LEDce)
   {
       pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
       ListEntry = ListEntry->Flink;
       if (pDCE == pdceClass)
       {
          DceFreeDCE(pDCE, TRUE); // Might have gone cheap!
       }
   }
}

Referenced by IntDestroyClass().

DceFreeDCE()

void FASTCALL DceFreeDCE	(	PDCE	pdce,
		BOOLEAN	Force
	)

Definition at line 632 of file windc.c.

{
  BOOL Hit = FALSE;

  ASSERT(pdce != NULL);
  if (NULL == pdce) return;

  pdce->DCXFlags |= DCX_INDESTROY;

  if (Force &&
      GreGetObjectOwner(pdce->hDC) != GDI_OBJ_HMGR_POWNED)
  {
     TRACE("Change ownership for DCE! -> %p\n" , pdce);
     // NOTE: Windows sets W32PF_OWNDCCLEANUP and moves on.
     if (GreIsHandleValid(pdce->hDC))
     {
         GreSetDCOwner(pdce->hDC, GDI_OBJ_HMGR_POWNED);
     }
     else
     {
         ERR("Attempted to change ownership of an DCEhDC %p currently being destroyed!!!\n",
             pdce->hDC);
         Hit = TRUE;
     }
  }
  else
  {
     if (GreGetObjectOwner(pdce->hDC) == GDI_OBJ_HMGR_PUBLIC)
        GreSetDCOwner(pdce->hDC, GDI_OBJ_HMGR_POWNED);
  }

  if (!Hit) IntGdiDeleteDC(pdce->hDC, TRUE);

  if (pdce->hrgnClip && !(pdce->DCXFlags & DCX_KEEPCLIPRGN))
  {
      GreDeleteObject(pdce->hrgnClip);
      pdce->hrgnClip = NULL;
  }

  RemoveEntryList(&pdce->List);

  ExFreePoolWithTag(pdce, USERTAG_DCE);

  DCECount--;
  TRACE("Freed DCE's! %d \n", DCECount);
}

Referenced by DceEmptyCache(), DceFreeClassDCE(), DceFreeThreadDCE(), DceFreeWindowDCE(), and DceReleaseDC().

DceFreeThreadDCE()

void FASTCALL DceFreeThreadDCE

(

PTHREADINFO

pti

)

Definition at line 779 of file windc.c.

{
   PDCE pDCE;
   PLIST_ENTRY ListEntry;

   ListEntry = LEDce.Flink;
   while (ListEntry != &LEDce)
   {
       pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
       ListEntry = ListEntry->Flink;
       if (pDCE->ptiOwner == pti)
       {
          if (pDCE->DCXFlags & DCX_CACHE)
          {
             DceFreeDCE(pDCE, TRUE);
          }
       }
   }
}

Referenced by ExitThreadCallback().

DceFreeWindowDCE()

void FASTCALL DceFreeWindowDCE

(

PWND

Window

)

Definition at line 685 of file windc.c.

{
  PDCE pDCE;
  PLIST_ENTRY ListEntry;

  if (DCECount <= 0)
  {
     ERR("FreeWindowDCE No Entry! %d\n",DCECount);
     return;
  }

  ListEntry = LEDce.Flink;
  while (ListEntry != &LEDce)
  {
     pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
     ListEntry = ListEntry->Flink;
     if ( pDCE->hwndCurrent == Window->head.h &&
          !(pDCE->DCXFlags & DCX_DCEEMPTY) )
     {
        if (!(pDCE->DCXFlags & DCX_CACHE)) /* Owned or Class DCE */
        {
           if (Window->pcls->style & CS_CLASSDC) /* Test Class first */
           {
              if (pDCE->DCXFlags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) /* Class DCE */
                 DceDeleteClipRgn(pDCE);
              // Update and reset Vis Rgn and clear the dirty bit.
              // Should release VisRgn than reset it to default.
              DceUpdateVisRgn(pDCE, Window, pDCE->DCXFlags);
              pDCE->DCXFlags = DCX_DCEEMPTY|DCX_CACHE;
              pDCE->hwndCurrent = 0;
              pDCE->pwndOrg = pDCE->pwndClip = NULL;

              TRACE("POWNED DCE going Cheap!! DCX_CACHE!! hDC-> %p \n",
                    pDCE->hDC);
              if (!GreSetDCOwner( pDCE->hDC, GDI_OBJ_HMGR_NONE))
              {
                  ERR("Fail Owner Switch hDC-> %p \n", pDCE->hDC);
                  break;
              }
              /* Do not change owner so thread can clean up! */
           }
           else if (Window->pcls->style & CS_OWNDC) /* Owned DCE */
           {
              DceFreeDCE(pDCE, FALSE);
              continue;
           }
           else
           {
              ERR("Not POWNED or CLASSDC hwndCurrent -> %p \n",
                  pDCE->hwndCurrent);
              // ASSERT(FALSE); /* bug 5320 */
           }
        }
        else
        {
           if (pDCE->DCXFlags & DCX_DCEBUSY) /* Shared cache DCE */
           {
              /* FIXME: AFAICS we are doing the right thing here so
               * this should be a TRACE. But this is best left as an ERR
               * because the 'application error' is likely to come from
               * another part of Wine (i.e. it's our fault after all).
               * We should change this to TRACE when ReactOS is more stable
               * (for 1.0?).
               */
              ERR("[%p] GetDC() without ReleaseDC()!\n", Window->head.h);
              DceReleaseDC(pDCE, FALSE);
           }
           pDCE->DCXFlags |= DCX_DCEEMPTY;
           pDCE->hwndCurrent = 0;
           pDCE->pwndOrg = pDCE->pwndClip = NULL;
        }
     }
  }
}

Referenced by co_UserFreeWindow().

DceGetDceFromDC()

DCE* FASTCALL DceGetDceFromDC

(

HDC

hdc

)

Definition at line 52 of file windc.c.

{
    PLIST_ENTRY ListEntry;
    DCE* dce;

    ListEntry = LEDce.Flink;
    while (ListEntry != &LEDce)
    {
        dce = CONTAINING_RECORD(ListEntry, DCE, List);
        ListEntry = ListEntry->Flink;
        if (dce->hDC == hdc)
            return dce;
    }

    return NULL;
}

DceGetVisRgn()

static PREGION FASTCALL DceGetVisRgn ( PWND  Window, ULONG  Flags, HWND  hWndChild, ULONG  CFlags  )

static

Definition at line 71 of file windc.c.

{
    PREGION Rgn;
    Rgn = VIS_ComputeVisibleRegion( Window,
                                    0 == (Flags & DCX_WINDOW),
                                    0 != (Flags & DCX_CLIPCHILDREN),
                                    0 != (Flags & DCX_CLIPSIBLINGS));
    /* Caller expects a non-null region */
    if (!Rgn)
        Rgn = IntSysCreateRectpRgn(0, 0, 0, 0);
    return Rgn;
}

Referenced by DceUpdateVisRgn().

DceReleaseDC()

static INT FASTCALL DceReleaseDC ( DCE *  dce, BOOL  EndPaint  )

static

Definition at line 278 of file windc.c.

{
   if (DCX_DCEBUSY != (dce->DCXFlags & (DCX_INDESTROY | DCX_DCEEMPTY | DCX_DCEBUSY)))
   {
      return 0;
   }

   /* Restore previous visible region */
   if (EndPaint)
   {
      DceUpdateVisRgn(dce, dce->pwndOrg, dce->DCXFlags);
   }

   if ((dce->DCXFlags & (DCX_INTERSECTRGN | DCX_EXCLUDERGN)) &&
         ((dce->DCXFlags & DCX_CACHE) || EndPaint))
   {
      DceDeleteClipRgn(dce);
   }

   if (dce->DCXFlags & DCX_CACHE)
   {
      if (!(dce->DCXFlags & DCX_NORESETATTRS))
      {
         // Clean the DC
         if (!IntGdiCleanDC(dce->hDC)) return 0;

         if (dce->DCXFlags & DCX_DCEDIRTY)
         {
           /* Don't keep around invalidated entries
            * because SetDCState() disables hVisRgn updates
            * by removing dirty bit. */
           dce->hwndCurrent = 0;
           dce->pwndOrg  = NULL;
           dce->pwndClip = NULL;
           dce->DCXFlags &= DCX_CACHE;
           dce->DCXFlags |= DCX_DCEEMPTY;
         }
      }
      dce->DCXFlags &= ~DCX_DCEBUSY;
      TRACE("Exit!!!!! DCX_CACHE!!!!!!   hDC-> %p \n", dce->hDC);
      if (!GreSetDCOwner(dce->hDC, GDI_OBJ_HMGR_NONE))
         return 0;
      dce->ptiOwner = NULL; // Reset ownership.
      dce->ppiOwner = NULL;

#if 0 // Need to research and fix before this is a "growing" issue.
      if (++DCECache > 32)
      {
         ListEntry = LEDce.Flink;
         while (ListEntry != &LEDce)
         {
            pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
            ListEntry = ListEntry->Flink;
            if (!(pDCE->DCXFlags & DCX_DCEBUSY))
            {  /* Free the unused cache DCEs. */
               DceFreeDCE(pDCE, TRUE);
            }
         }
      }
#endif
   }
   return 1; // Released!
}

Referenced by DceFreeWindowDCE(), and UserReleaseDC().

DceResetActiveDCEs()

VOID FASTCALL DceResetActiveDCEs

(

PWND

Window

)

Definition at line 815 of file windc.c.

{
   DCE *pDCE;
   PDC dc;
   PWND CurrentWindow;
   INT DeltaX;
   INT DeltaY;
   PLIST_ENTRY ListEntry;

   if (NULL == Window)
   {
      return;
   }

   ListEntry = LEDce.Flink;
   while (ListEntry != &LEDce)
   {
      pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
      ListEntry = ListEntry->Flink;
      if (0 == (pDCE->DCXFlags & (DCX_DCEEMPTY|DCX_INDESTROY)))
      {
         if (Window->head.h == pDCE->hwndCurrent)
         {
            CurrentWindow = Window;
         }
         else
         {
            if (!pDCE->hwndCurrent)
               CurrentWindow = NULL;
            else
               CurrentWindow = UserGetWindowObject(pDCE->hwndCurrent);
            if (NULL == CurrentWindow)
            {
               continue;
            }
         }

         if (!GreIsHandleValid(pDCE->hDC) ||
             (dc = DC_LockDc(pDCE->hDC)) == NULL)
         {
            continue;
         }
         if (Window == CurrentWindow || IntIsChildWindow(Window, CurrentWindow))
         {
            if (pDCE->DCXFlags & DCX_WINDOW)
            {
               DeltaX = CurrentWindow->rcWindow.left - dc->ptlDCOrig.x;
               DeltaY = CurrentWindow->rcWindow.top - dc->ptlDCOrig.y;
               dc->ptlDCOrig.x = CurrentWindow->rcWindow.left;
               dc->ptlDCOrig.y = CurrentWindow->rcWindow.top;
            }
            else
            {
               DeltaX = CurrentWindow->rcClient.left - dc->ptlDCOrig.x;
               DeltaY = CurrentWindow->rcClient.top - dc->ptlDCOrig.y;
               dc->ptlDCOrig.x = CurrentWindow->rcClient.left;
               dc->ptlDCOrig.y = CurrentWindow->rcClient.top;
            }

            if (NULL != dc->dclevel.prgnClip)
            {
               REGION_bOffsetRgn(dc->dclevel.prgnClip, DeltaX, DeltaY);
               dc->fs |= DC_FLAG_DIRTY_RAO;
            }
            if (NULL != pDCE->hrgnClip)
            {
               NtGdiOffsetRgn(pDCE->hrgnClip, DeltaX, DeltaY);
            }
         }
         DC_UnlockDc(dc);

         DceUpdateVisRgn(pDCE, CurrentWindow, pDCE->DCXFlags);
         IntGdiSetHookFlags(pDCE->hDC, DCHF_VALIDATEVISRGN);
      }
   }
}

Referenced by co_IntSetParent(), co_IntSetWindowLongPtr(), co_WinPosSetWindowPos(), and IntSetStyle().

DceSetDrawable()

static VOID APIENTRY DceSetDrawable ( PWND Window  OPTIONAL, HDC  hDC, ULONG  Flags, BOOL  SetClipOrigin  )

static

Definition at line 144 of file windc.c.

{
  RECTL rect = {0,0,0,0};

  if (Window)
  {
      if (Flags & DCX_WINDOW)
      {
         rect = Window->rcWindow;
      }
      else
      {
         rect = Window->rcClient;
      }
  }

  /* Set DC Origin and Window Rectangle */
  GreSetDCOrg( hDC, rect.left, rect.top, &rect);
}

Referenced by UserGetDCEx().

DceUpdateVisRgn()

VOID FASTCALL DceUpdateVisRgn	(	DCE *	Dce,
		PWND	Window,
		ULONG	Flags
	)

Definition at line 191 of file windc.c.

{
   PREGION RgnVisible = NULL;
   ULONG DcxFlags;
   PWND DesktopWindow;

   if (Flags & DCX_PARENTCLIP)
   {
      PWND Parent;

      Parent = Window->spwndParent;
      if (!Parent)
      {
         RgnVisible = NULL;
         goto noparent;
      }

      if (Parent->style & WS_CLIPSIBLINGS)
      {
         DcxFlags = DCX_CLIPSIBLINGS |
                    (Flags & ~(DCX_CLIPCHILDREN | DCX_WINDOW));
      }
      else
      {
         DcxFlags = Flags & ~(DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | DCX_WINDOW);
      }
      RgnVisible = DceGetVisRgn(Parent, DcxFlags, Window->head.h, Flags);
   }
   else if (Window == NULL)
   {
      DesktopWindow = UserGetWindowObject(IntGetDesktopWindow());
      if (NULL != DesktopWindow)
      {
         RgnVisible = IntSysCreateRectpRgnIndirect(&DesktopWindow->rcWindow);
      }
      else
      {
         RgnVisible = NULL;
      }
   }
   else
   {
      RgnVisible = DceGetVisRgn(Window, Flags, 0, 0);
   }

noparent:
   if (Flags & DCX_INTERSECTRGN)
   {
      PREGION RgnClip = NULL;

      if (Dce->hrgnClip != NULL)
          RgnClip = REGION_LockRgn(Dce->hrgnClip);

      if (RgnClip)
      {
         IntGdiCombineRgn(RgnVisible, RgnVisible, RgnClip, RGN_AND);
         REGION_UnlockRgn(RgnClip);
      }
      else
      {
         if (RgnVisible != NULL)
         {
            REGION_Delete(RgnVisible);
         }
         RgnVisible = IntSysCreateRectpRgn(0, 0, 0, 0);
      }
   }
   else if ((Flags & DCX_EXCLUDERGN) && Dce->hrgnClip != NULL)
   {
       PREGION RgnClip = REGION_LockRgn(Dce->hrgnClip);
       IntGdiCombineRgn(RgnVisible, RgnVisible, RgnClip, RGN_DIFF);
       REGION_UnlockRgn(RgnClip);
   }

   Dce->DCXFlags &= ~DCX_DCEDIRTY;
   GdiSelectVisRgn(Dce->hDC, RgnVisible);
   /* Tell GDI driver */
   if (Window)
       IntEngWindowChanged(Window, WOC_RGN_CLIENT);

   if (RgnVisible != NULL)
   {
      REGION_Delete(RgnVisible);
   }
}

Referenced by DceFreeWindowDCE(), DceReleaseDC(), DceResetActiveDCEs(), and UserGetDCEx().

InitDCEImpl()

INIT_FUNCTION NTSTATUS NTAPI InitDCEImpl

(

VOID

)

Definition at line 30 of file windc.c.

{
    InitializeListHead(&LEDce);
    return STATUS_SUCCESS;
}

Referenced by DriverEntry().

IntWindowFromDC()

HWND FASTCALL IntWindowFromDC

(

HDC

hDc

)

Definition at line 893 of file windc.c.

{
  DCE *Dce;
  PLIST_ENTRY ListEntry;
  HWND Ret = NULL;

  ListEntry = LEDce.Flink;
  while (ListEntry != &LEDce)
  {
      Dce = CONTAINING_RECORD(ListEntry, DCE, List);
      ListEntry = ListEntry->Flink;
      if (Dce->hDC == hDc)
      {
         if (Dce->DCXFlags & DCX_INDESTROY)
            Ret = NULL;
         else
            Ret = Dce->hwndCurrent;
         break;
      }
  }
  return Ret;
}

Referenced by NtGdiUpdateColors(), NtUserCallOneParam(), UserGethWnd(), and UserRealizePalette().

NtUserGetDC()

HDC APIENTRY NtUserGetDC

(

HWND

hWnd

)

Definition at line 1013 of file windc.c.

{
 TRACE("NtUGetDC -> %p:%x\n", hWnd, !hWnd ? DCX_CACHE | DCX_WINDOW : DCX_USESTYLE);

  return NtUserGetDCEx(hWnd, NULL, NULL == hWnd ? DCX_CACHE | DCX_WINDOW : DCX_USESTYLE);
}

Referenced by GetDC().

NtUserGetDCEx()

HDC APIENTRY NtUserGetDCEx	(	HWND hWnd	OPTIONAL,
		HANDLE	ClipRegion,
		ULONG	Flags
	)

Definition at line 973 of file windc.c.

{
  PWND Wnd=NULL;
  DECLARE_RETURN(HDC);

  TRACE("Enter NtUserGetDCEx: hWnd %p, ClipRegion %p, Flags %x.\n",
      hWnd, ClipRegion, Flags);
  UserEnterExclusive();

  if (hWnd && !(Wnd = UserGetWindowObject(hWnd)))
  {
      RETURN(NULL);
  }
  RETURN( UserGetDCEx(Wnd, ClipRegion, Flags));

CLEANUP:
  TRACE("Leave NtUserGetDCEx, ret=%p\n", _ret_);
  UserLeave();
  END_CLEANUP;
}

Referenced by GetDCEx(), NtUserGetDC(), and NtUserGetWindowDC().

NtUserGetWindowDC()

HDC APIENTRY NtUserGetWindowDC

(

HWND

hWnd

)

Definition at line 1007 of file windc.c.

{
  return NtUserGetDCEx(hWnd, 0, DCX_USESTYLE | DCX_WINDOW);
}

Referenced by GetWindowDC().

NtUserSelectPalette()

HPALETTE APIENTRY NtUserSelectPalette	(	HDC	hDC,
		HPALETTE	hpal,
		BOOL	ForceBackground
	)

Select logical palette into device context.

Parameters

hDC	handle to the device context
hpal	handle to the palette
ForceBackground	If this value is FALSE the logical palette will be copied to the device palette only when the applicatioon is in the foreground. If this value is TRUE then map the colors in the logical palette to the device palette colors in the best way.

Returns

old palette

Todo:

implement ForceBackground == TRUE

Definition at line 1033 of file windc.c.

{
    HPALETTE oldPal;
    UserEnterExclusive();
    // Implement window checks
    oldPal = GdiSelectPalette( hDC, hpal, ForceBackground);
    UserLeave();
    return oldPal;
}

Referenced by SelectPalette(), and START_TEST().

UserGetDCEx()

HDC FASTCALL UserGetDCEx	(	PWND Wnd	OPTIONAL,
		HANDLE	ClipRegion,
		ULONG	Flags
	)

Definition at line 344 of file windc.c.

{
   PWND Parent;
   ULONG DcxFlags;
   DCE* Dce = NULL;
   BOOL UpdateClipOrigin = FALSE;
   BOOL bUpdateVisRgn = TRUE;
   HDC hDC = NULL;
   PPROCESSINFO ppi;
   PLIST_ENTRY ListEntry;

   if (NULL == Wnd)
   {
      Flags &= ~DCX_USESTYLE;
      Flags |= DCX_CACHE;
   }

   if (Flags & DCX_PARENTCLIP) Flags |= DCX_CACHE;

   // When GetDC is called with hWnd nz, DCX_CACHE & _WINDOW are clear w _USESTYLE set.
   if (Flags & DCX_USESTYLE)
   {
      Flags &= ~(DCX_CLIPCHILDREN | DCX_CLIPSIBLINGS | DCX_PARENTCLIP);
      if (!(Flags & DCX_WINDOW)) // Not window rectangle
      {
         if (Wnd->pcls->style & CS_PARENTDC)
         {
            Flags |= DCX_PARENTCLIP;
         }

         if (!(Flags & DCX_CACHE) && // Not on the cheap wine list.
             !(Wnd->pcls->style & CS_OWNDC) )
         {
            if (!(Wnd->pcls->style & CS_CLASSDC))
            // The window is not POWNED or has any CLASS, so we are looking for cheap wine.
               Flags |= DCX_CACHE;
            else
            {
               if (Wnd->pcls->pdce) hDC = ((PDCE)Wnd->pcls->pdce)->hDC;
               TRACE("We have CLASS!!\n");
            }
         }

         if (Wnd->style & WS_CLIPSIBLINGS)
         {
            Flags |= DCX_CLIPSIBLINGS;
         }

         if (Wnd->style & WS_CLIPCHILDREN &&
             !(Wnd->style & WS_MINIMIZE))
         {
            Flags |= DCX_CLIPCHILDREN;
         }
         /* If minized with icon in the set, we are forced to be cheap! */
         if (Wnd->style & WS_MINIMIZE && Wnd->pcls->spicn)
         {
            Flags |= DCX_CACHE;
         }
      }
      else
      {
         if (Wnd->style & WS_CLIPSIBLINGS) Flags |= DCX_CLIPSIBLINGS;
         Flags |= DCX_CACHE;
      }
   }

   if (Flags & DCX_WINDOW) Flags &= ~DCX_CLIPCHILDREN;

   if (Flags & DCX_NOCLIPCHILDREN)
   {
      Flags |= DCX_CACHE;
      Flags &= ~(DCX_PARENTCLIP | DCX_CLIPCHILDREN);
   }

   Parent = (Wnd ? Wnd->spwndParent : NULL);

   if (NULL == Wnd || !(Wnd->style & WS_CHILD) || NULL == Parent)
   {
      Flags &= ~DCX_PARENTCLIP;
      Flags |= DCX_CLIPSIBLINGS;
   }

   /* It seems parent clip is ignored when clipping siblings or children */
   if (Flags & (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN)) Flags &= ~DCX_PARENTCLIP;

   if (Flags & DCX_PARENTCLIP)
   {
      if ((Wnd->style & WS_VISIBLE) &&
          (Parent->style & WS_VISIBLE))
      {
         Flags &= ~DCX_CLIPCHILDREN;
         if (Parent->style & WS_CLIPSIBLINGS)
         {
            Flags |= DCX_CLIPSIBLINGS;
         }
      }
   }

   // Window nz, check to see if we still own this or it is just cheap wine tonight.
   if (!(Flags & DCX_CACHE))
   {
      if ( Wnd->head.pti != GetW32ThreadInfo())
         Flags |= DCX_CACHE; // Ah~ Not Powned! Forced to be cheap~
   }

   DcxFlags = Flags & DCX_CACHECOMPAREMASK;

   if (Flags & DCX_CACHE)
   { // Scan the cheap wine list for our match.
      DCE* DceEmpty = NULL;
      DCE* DceUnused = NULL;
      KeEnterCriticalRegion();
      ListEntry = LEDce.Flink;
      while (ListEntry != &LEDce)
      {
         Dce = CONTAINING_RECORD(ListEntry, DCE, List);
         ListEntry = ListEntry->Flink;
//
// The way I understand this, you can have more than one DC per window.
// Only one Owned if one was requested and saved and one Cached.
//
         if ((Dce->DCXFlags & (DCX_CACHE | DCX_DCEBUSY)) == DCX_CACHE)
         {
            DceUnused = Dce;
            if (Dce->DCXFlags & DCX_DCEEMPTY)
            {
               DceEmpty = Dce;
            }
            else if (Dce->hwndCurrent == (Wnd ? Wnd->head.h : NULL) &&
                     ((Dce->DCXFlags & DCX_CACHECOMPAREMASK) == DcxFlags))
            {
               UpdateClipOrigin = TRUE;
               break;
            }
         }
         Dce = NULL; // Loop issue?
      }
      KeLeaveCriticalRegion();

      Dce = (DceEmpty == NULL) ? DceUnused : DceEmpty;

      if (Dce == NULL)
      {
         Dce = DceAllocDCE(NULL, DCE_CACHE_DC);
      }
      if (Dce == NULL) return NULL;

      Dce->hwndCurrent = (Wnd ? Wnd->head.h : NULL);
      Dce->pwndOrg = Dce->pwndClip = Wnd;
   }
   else // If we are here, we are POWNED or having CLASS.
   {
      KeEnterCriticalRegion();
      ListEntry = LEDce.Flink;
      while (ListEntry != &LEDce)
      {
          Dce = CONTAINING_RECORD(ListEntry, DCE, List);
          ListEntry = ListEntry->Flink;

          // Skip Cache DCE entries.
          if (!(Dce->DCXFlags & DCX_CACHE))
          {
             // Check for Window handle than HDC match for CLASS.
             if (Dce->hwndCurrent == Wnd->head.h)
             {
                bUpdateVisRgn = FALSE;
                break;
             }
             else if (Dce->hDC == hDC) break;
          }
          Dce = NULL; // Loop issue?
      }
      KeLeaveCriticalRegion();

      if (Dce == NULL)
      {
         return(NULL);
      }

      if ( (Flags & (DCX_INTERSECTRGN|DCX_EXCLUDERGN)) &&
           (Dce->DCXFlags & (DCX_INTERSECTRGN|DCX_EXCLUDERGN)) )
      {
         DceDeleteClipRgn(Dce);
      }
   }
// First time use hax, need to use DceAllocDCE during window display init.
   if (NULL == Dce)
   {
      return(NULL);
   }

   if (!GreIsHandleValid(Dce->hDC))
   {
      ERR("FIXME: Got DCE with invalid hDC! %p\n", Dce->hDC);
      Dce->hDC = DceCreateDisplayDC();
      /* FIXME: Handle error */
   }

   Dce->DCXFlags = Flags | DCX_DCEBUSY;

   /*
    * Bump it up! This prevents the random errors in wine dce tests and with
    * proper bits set in DCX_CACHECOMPAREMASK.
    * Reference:
    *   http://www.reactos.org/archives/public/ros-dev/2008-July/010498.html
    *   http://www.reactos.org/archives/public/ros-dev/2008-July/010499.html
    */
   RemoveEntryList(&Dce->List);
   InsertHeadList(&LEDce, &Dce->List);

   /* Introduced in rev 6691 and modified later. */
   if ( (Flags & DCX_INTERSECTUPDATE) && !ClipRegion )
   {
      Flags |= DCX_INTERSECTRGN | DCX_KEEPCLIPRGN;
      Dce->DCXFlags |= DCX_INTERSECTRGN | DCX_KEEPCLIPRGN;
      ClipRegion = Wnd->hrgnUpdate;
      bUpdateVisRgn = TRUE;
   }

   if (ClipRegion == HRGN_WINDOW)
   {
      if (!(Flags & DCX_WINDOW))
      {
         Dce->hrgnClip = NtGdiCreateRectRgn(
             Wnd->rcClient.left,
             Wnd->rcClient.top,
             Wnd->rcClient.right,
             Wnd->rcClient.bottom);
      }
      else
      {
          Dce->hrgnClip = NtGdiCreateRectRgn(
              Wnd->rcWindow.left,
              Wnd->rcWindow.top,
              Wnd->rcWindow.right,
              Wnd->rcWindow.bottom);
      }
      Dce->DCXFlags &= ~DCX_KEEPCLIPRGN;
      bUpdateVisRgn = TRUE;
   }
   else if (ClipRegion != NULL)
   {
      if (Dce->hrgnClip != NULL)
      {
         ERR("Should not be called!!\n");
         GreDeleteObject(Dce->hrgnClip);
         Dce->hrgnClip = NULL;
      }
      Dce->hrgnClip = ClipRegion;
      bUpdateVisRgn = TRUE;
   }

   if (IntGdiSetHookFlags(Dce->hDC, DCHF_VALIDATEVISRGN)) bUpdateVisRgn = TRUE;

   DceSetDrawable(Wnd, Dce->hDC, Flags, UpdateClipOrigin);

   if (bUpdateVisRgn) DceUpdateVisRgn(Dce, Wnd, Flags);

   if (Dce->DCXFlags & DCX_CACHE)
   {
      TRACE("ENTER!!!!!! DCX_CACHE!!!!!!   hDC-> %p\n", Dce->hDC);
      // Need to set ownership so Sync dcattr will work.
      GreSetDCOwner(Dce->hDC, GDI_OBJ_HMGR_POWNED);
      Dce->ptiOwner = GetW32ThreadInfo(); // Set the temp owning
   }

   if ( Wnd &&
        Wnd->ExStyle & WS_EX_LAYOUTRTL &&
       !(Flags & DCX_KEEPLAYOUT) )
   {
      NtGdiSetLayout(Dce->hDC, -1, LAYOUT_RTL);
   }

   if (Dce->DCXFlags & DCX_PROCESSOWNED)
   {
      ppi = PsGetCurrentProcessWin32Process();
      ppi->W32PF_flags |= W32PF_OWNDCCLEANUP;
      Dce->ptiOwner = NULL;
      Dce->ppiOwner = ppi;
   }

   return(Dce->hDC);
}

Referenced by NtUserGetDCEx(), and UserGetWindowDC().

UserGethWnd()

HWND FASTCALL UserGethWnd	(	HDC	hdc,
		PWNDOBJ *	pwndo
	)

Definition at line 952 of file windc.c.

{
  EWNDOBJ* Clip;
  PWND Wnd;
  HWND hWnd;

  hWnd = IntWindowFromDC(hdc);

  if (hWnd && (Wnd = UserGetWindowObject(hWnd)))
  {
     Clip = (EWNDOBJ*)UserGetProp(Wnd, AtomWndObj, TRUE);

     if ( Clip && Clip->Hwnd == hWnd )
     {
        if (pwndo) *pwndo = (PWNDOBJ)Clip;
     }
  }
  return hWnd;
}

Referenced by NtGdiSetPixelFormat(), and NtGdiSwapBuffers().

UserGetWindowDC()

HDC FASTCALL UserGetWindowDC

(

PWND

Wnd

)

Definition at line 946 of file windc.c.

{
  return UserGetDCEx(Wnd, 0, DCX_USESTYLE | DCX_WINDOW);
}

Referenced by DefWndScreenshot(), IntAnimatePalette(), NC_DoButton(), NC_HandleNCLButtonDown(), UserGetDesktopDC(), and UserRealizePalette().

UserReleaseDC()

INT FASTCALL UserReleaseDC	(	PWND	Window,
		HDC	hDc,
		BOOL	EndPaint
	)

Definition at line 917 of file windc.c.

{
  PDCE dce;
  PLIST_ENTRY ListEntry;
  INT nRet = 0;
  BOOL Hit = FALSE;

  TRACE("%p %p\n", Window, hDc);
  ListEntry = LEDce.Flink;
  while (ListEntry != &LEDce)
  {
     dce = CONTAINING_RECORD(ListEntry, DCE, List);
     ListEntry = ListEntry->Flink;
     if (dce->hDC == hDc)
     {
        Hit = TRUE;
        break;
     }
  }

  if ( Hit && (dce->DCXFlags & DCX_DCEBUSY))
  {
     nRet = DceReleaseDC(dce, EndPaint);
  }

  return nRet;
}

Referenced by co_IntDrawCaret(), co_IntPaintWindows(), co_UserGetUpdateRect(), co_WinPosSetWindowPos(), DefWndDoSizeMove(), DefWndScreenshot(), IntAnimatePalette(), IntDefWindowProc(), IntEndPaint(), IntGdiDeleteDC(), IntGetDialogBaseUnits(), IntPrintWindow(), IntScrollWindowEx(), IntSynthesizeBitmap(), IntSynthesizeDib(), IntUpdateLayeredWindowI(), MENU_PopupMenuCalcSize(), MENU_SelectItem(), MENU_ShowSubPopup(), NC_DoButton(), NC_HandleNCActivate(), NC_HandleNCCalcSize(), NC_HandleNCLButtonDown(), NtUserCalcMenuBar(), NtUserCallOneParam(), PaintSuspendedWindow(), SnapWindow(), UserPaintCaption(), and UserRealizePalette().

Variable Documentation

DCECount

INT DCECount = 0

static

Definition at line 18 of file windc.c.

Referenced by DceAllocDCE(), DceFreeDCE(), and DceFreeWindowDCE().

LEDce

LIST_ENTRY LEDce

static

Definition at line 17 of file windc.c.

Referenced by DceAllocDCE(), DceEmptyCache(), DceFreeClassDCE(), DceFreeThreadDCE(), DceFreeWindowDCE(), DceGetDceFromDC(), DceReleaseDC(), DceResetActiveDCEs(), InitDCEImpl(), IntWindowFromDC(), UserGetDCEx(), and UserReleaseDC().