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reactos/win32ss/user/ntuser/windc.c
Andriy Shevchenko 2ea03b5b22
[REACTOS] Fix typos in comments (#5591) 
Fixing typos in code comments enhances code readability and comprehension for developers and collaborators.
2023-08-22 16:20:29 +03:00

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/*
* PROJECT: ReactOS Win32k subsystem
* LICENSE: GPL - See COPYING in the top level directory
* FILE: win32ss/user/ntuser/windc.c
* PURPOSE: Window DC management
* COPYRIGHT: Copyright 2007 ReactOS Team
*/
#include <win32k.h>
DBG_DEFAULT_CHANNEL(UserDce);
/* GLOBALS *******************************************************************/
/* NOTE: I think we should store this per window station (including GDI objects) */
/* Answer: No, use the DCE pMonitor to compare with! */
static LIST_ENTRY LEDce;
static INT DCECount = 0; // Count of DCE in system.
#define DCX_CACHECOMPAREMASK (DCX_CLIPSIBLINGS | DCX_CLIPCHILDREN | \
DCX_NORESETATTRS | DCX_LOCKWINDOWUPDATE | \
DCX_LAYEREDWIN | DCX_CACHE | DCX_WINDOW | \
DCX_PARENTCLIP)
/* FUNCTIONS *****************************************************************/
CODE_SEG("INIT")
NTSTATUS
NTAPI
InitDCEImpl(VOID)
{
InitializeListHead(&LEDce);
return STATUS_SUCCESS;
}
//
// This should be moved to dc.c or dcutil.c.
//
HDC FASTCALL
DceCreateDisplayDC(VOID)
{
UNICODE_STRING DriverName = RTL_CONSTANT_STRING(L"DISPLAY");
if (!co_IntGraphicsCheck(TRUE))
KeBugCheckEx(VIDEO_DRIVER_INIT_FAILURE, 0, 0, 0, USER_VERSION);
return IntGdiCreateDC(&DriverName, NULL, NULL, NULL, FALSE);
}
/* Returns the DCE pointer from the HDC handle */
DCE*
FASTCALL
DceGetDceFromDC(HDC hdc)
{
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;
}
static
PREGION FASTCALL
DceGetVisRgn(PWND Window, ULONG Flags, HWND hWndChild, ULONG CFlags)
{
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;
}
PDCE FASTCALL
DceAllocDCE(PWND Window OPTIONAL, DCE_TYPE Type)
{
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);
}
static VOID APIENTRY
DceSetDrawable( PWND Window OPTIONAL,
HDC hDC,
ULONG Flags,
BOOL SetClipOrigin)
{
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);
}
static VOID FASTCALL
DceDeleteClipRgn(DCE* Dce)
{
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);
}
VOID
FASTCALL
DceUpdateVisRgn(DCE *Dce, PWND Window, ULONG Flags)
{
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);
}
}
static INT FASTCALL
DceReleaseDC(DCE* dce, BOOL EndPaint)
{
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!
}
HDC FASTCALL
UserGetDCEx(PWND Wnd OPTIONAL, HANDLE ClipRegion, ULONG Flags)
{
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:
* https://reactos.org/archives/public/ros-dev/2008-July/010498.html
* https://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);
}
/***********************************************************************
* DceFreeDCE
*/
void FASTCALL
DceFreeDCE(PDCE pdce, BOOLEAN Force)
{
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);
}
/***********************************************************************
* DceFreeWindowDCE
*
* Remove owned DCE and reset unreleased cache DCEs.
*/
void FASTCALL
DceFreeWindowDCE(PWND Window)
{
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;
}
}
}
}
void FASTCALL
DceFreeClassDCE(PDCE pdceClass)
{
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!
}
}
}
void FASTCALL
DceFreeThreadDCE(PTHREADINFO pti)
{
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);
}
}
}
}
VOID FASTCALL
DceEmptyCache(VOID)
{
PDCE pDCE;
PLIST_ENTRY ListEntry;
ListEntry = LEDce.Flink;
while (ListEntry != &LEDce)
{
pDCE = CONTAINING_RECORD(ListEntry, DCE, List);
ListEntry = ListEntry->Flink;
DceFreeDCE(pDCE, TRUE);
}
}
VOID FASTCALL
DceResetActiveDCEs(PWND Window)
{
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_DIRTY_RAO;
}
if (NULL != pDCE->hrgnClip)
{
NtGdiOffsetRgn(pDCE->hrgnClip, DeltaX, DeltaY);
}
}
DC_UnlockDc(dc);
DceUpdateVisRgn(pDCE, CurrentWindow, pDCE->DCXFlags);
IntGdiSetHookFlags(pDCE->hDC, DCHF_VALIDATEVISRGN);
}
}
}
HWND FASTCALL
IntWindowFromDC(HDC hDc)
{
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;
}
INT FASTCALL
UserReleaseDC(PWND Window, HDC hDc, BOOL EndPaint)
{
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;
}
HDC FASTCALL
UserGetWindowDC(PWND Wnd)
{
return UserGetDCEx(Wnd, 0, DCX_USESTYLE | DCX_WINDOW);
}
HWND FASTCALL
UserGethWnd( HDC hdc, PWNDOBJ *pwndo)
{
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;
}
HDC APIENTRY
NtUserGetDCEx(HWND hWnd OPTIONAL, HANDLE ClipRegion, ULONG Flags)
{
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;
}
/*
* NtUserGetWindowDC
*
* The NtUserGetWindowDC function retrieves the device context (DC) for the
* entire window, including title bar, menus, and scroll bars. A window device
* context permits painting anywhere in a window, because the origin of the
* device context is the upper-left corner of the window instead of the client
* area.
*
* Status
* @implemented
*/
HDC APIENTRY
NtUserGetWindowDC(HWND hWnd)
{
return NtUserGetDCEx(hWnd, 0, DCX_USESTYLE | DCX_WINDOW);
}
HDC APIENTRY
NtUserGetDC(HWND hWnd)
{
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);
}
/*!
* Select logical palette into device context.
* \param hDC handle to the device context
* \param hpal handle to the palette
* \param ForceBackground If this value is FALSE the logical palette will be copied to the device palette only when the application
* 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.
* \return old palette
*
* \todo implement ForceBackground == TRUE
*/
HPALETTE
APIENTRY
NtUserSelectPalette(HDC hDC,
HPALETTE hpal,
BOOL ForceBackground)
{
HPALETTE oldPal;
UserEnterExclusive();
// Implement window checks
oldPal = GdiSelectPalette( hDC, hpal, ForceBackground);
UserLeave();
return oldPal;
}
/* EOF */
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