VOID FASTCALL
co_VIS_WindowLayoutChanged(
PWND Wnd,
PREGION NewlyExposed)
{
PWND Parent;
USER_REFERENCE_ENTRY Ref;
ASSERT_REFS_CO(Wnd);
Parent = Wnd->spwndParent;
if(Parent)
{
PREGION TempRgn = IntSysCreateRectpRgn(0, 0, 0, 0);
if (!TempRgn)
return;
IntGdiCombineRgn(TempRgn, NewlyExposed, NULL, RGN_COPY);
REGION_bOffsetRgn(TempRgn,
Wnd->rcWindow.left - Parent->rcClient.left,
Wnd->rcWindow.top - Parent->rcClient.top);
UserRefObjectCo(Parent, &Ref);
co_UserRedrawWindow(Parent, NULL, TempRgn,
RDW_FRAME | RDW_ERASE | RDW_INVALIDATE |
RDW_ALLCHILDREN);
UserDerefObjectCo(Parent);
REGION_Delete(TempRgn);
}
}
VOID
FASTCALL
GdiSelectVisRgn(
HDC hdc,
PREGION prgn)
{
DC *dc;
if (!(dc = DC_LockDc(hdc)))
{
EngSetLastError(ERROR_INVALID_HANDLE);
return;
}
dc->fs |= DC_FLAG_DIRTY_RAO;
ASSERT(dc->prgnVis != NULL);
ASSERT(prgn != NULL);
IntGdiCombineRgn(dc->prgnVis, prgn, NULL, RGN_COPY);
REGION_bOffsetRgn(dc->prgnVis, -dc->ptlDCOrig.x, -dc->ptlDCOrig.y);
DC_UnlockDc(dc);
}
PREGION FASTCALL
VIS_ComputeVisibleRegion(
PWND Wnd,
BOOLEAN ClientArea,
BOOLEAN ClipChildren,
BOOLEAN ClipSiblings)
{
PREGION VisRgn, ClipRgn;
PWND PreviousWindow, CurrentWindow, CurrentSibling;
if (!Wnd || !(Wnd->style & WS_VISIBLE))
{
return NULL;
}
VisRgn = NULL;
if (ClientArea)
{
VisRgn = IntSysCreateRectpRgnIndirect(&Wnd->rcClient);
}
else
{
VisRgn = IntSysCreateRectpRgnIndirect(&Wnd->rcWindow);
}
/*
* Walk through all parent windows and for each clip the visble region
* to the parent's client area and exclude all siblings that are over
* our window.
*/
PreviousWindow = Wnd;
CurrentWindow = Wnd->spwndParent;
while (CurrentWindow)
{
if (!VerifyWnd(CurrentWindow))
{
ERR("ATM the Current Window or Parent is dead! %p\n",CurrentWindow);
if (VisRgn)
REGION_Delete(VisRgn);
return NULL;
}
if (!(CurrentWindow->style & WS_VISIBLE))
{
if (VisRgn)
REGION_Delete(VisRgn);
return NULL;
}
ClipRgn = IntSysCreateRectpRgnIndirect(&CurrentWindow->rcClient);
IntGdiCombineRgn(VisRgn, VisRgn, ClipRgn, RGN_AND);
REGION_Delete(ClipRgn);
if ((PreviousWindow->style & WS_CLIPSIBLINGS) ||
(PreviousWindow == Wnd && ClipSiblings))
{
CurrentSibling = CurrentWindow->spwndChild;
while ( CurrentSibling != NULL &&
CurrentSibling != PreviousWindow )
{
if ((CurrentSibling->style & WS_VISIBLE) &&
!(CurrentSibling->ExStyle & WS_EX_TRANSPARENT))
{
ClipRgn = IntSysCreateRectpRgnIndirect(&CurrentSibling->rcWindow);
/* Combine it with the window region if available */
if (CurrentSibling->hrgnClip && !(CurrentSibling->style & WS_MINIMIZE))
{
PREGION SiblingClipRgn = REGION_LockRgn(CurrentSibling->hrgnClip);
if (SiblingClipRgn)
{
REGION_bOffsetRgn(ClipRgn, -CurrentSibling->rcWindow.left, -CurrentSibling->rcWindow.top);
IntGdiCombineRgn(ClipRgn, ClipRgn, SiblingClipRgn, RGN_AND);
REGION_bOffsetRgn(ClipRgn, CurrentSibling->rcWindow.left, CurrentSibling->rcWindow.top);
REGION_UnlockRgn(SiblingClipRgn);
}
}
IntGdiCombineRgn(VisRgn, VisRgn, ClipRgn, RGN_DIFF);
REGION_Delete(ClipRgn);
}
CurrentSibling = CurrentSibling->spwndNext;
}
}
PreviousWindow = CurrentWindow;
CurrentWindow = CurrentWindow->spwndParent;
}
if (ClipChildren)
{
CurrentWindow = Wnd->spwndChild;
while (CurrentWindow)
{
if ((CurrentWindow->style & WS_VISIBLE) &&
!(CurrentWindow->ExStyle & WS_EX_TRANSPARENT))
{
ClipRgn = IntSysCreateRectpRgnIndirect(&CurrentWindow->rcWindow);
/* Combine it with the window region if available */
if (CurrentWindow->hrgnClip && !(CurrentWindow->style & WS_MINIMIZE))
{
PREGION CurrentRgnClip = REGION_LockRgn(CurrentWindow->hrgnClip);
if (CurrentRgnClip)
{
REGION_bOffsetRgn(ClipRgn, -CurrentWindow->rcWindow.left, -CurrentWindow->rcWindow.top);
IntGdiCombineRgn(ClipRgn, ClipRgn, CurrentRgnClip, RGN_AND);
REGION_bOffsetRgn(ClipRgn, CurrentWindow->rcWindow.left, CurrentWindow->rcWindow.top);
REGION_UnlockRgn(CurrentRgnClip);
}
}
IntGdiCombineRgn(VisRgn, VisRgn, ClipRgn, RGN_DIFF);
REGION_Delete(ClipRgn);
}
CurrentWindow = CurrentWindow->spwndNext;
}
}
if (Wnd->hrgnClip && !(Wnd->style & WS_MINIMIZE))
{
PREGION WndRgnClip = REGION_LockRgn(Wnd->hrgnClip);
if (WndRgnClip)
{
REGION_bOffsetRgn(VisRgn, -Wnd->rcWindow.left, -Wnd->rcWindow.top);
IntGdiCombineRgn(VisRgn, VisRgn, WndRgnClip, RGN_AND);
REGION_bOffsetRgn(VisRgn, Wnd->rcWindow.left, Wnd->rcWindow.top);
REGION_UnlockRgn(WndRgnClip);
}
}
return VisRgn;
}
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_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);
}
}
}
