int APIENTRY NtGdiExcludeClipRect(HDC hDC,
int LeftRect,
int TopRect,
int RightRect,
int BottomRect)
{
INT Result;
RECTL Rect;
PREGION prgnNew, prgnClip;
PDC dc = DC_LockDc(hDC);
if (!dc)
{
EngSetLastError(ERROR_INVALID_HANDLE);
return ERROR;
}
Rect.left = LeftRect;
Rect.top = TopRect;
Rect.right = RightRect;
Rect.bottom = BottomRect;
IntLPtoDP(dc, (LPPOINT)&Rect, 2);
prgnNew = IntSysCreateRectpRgnIndirect(&Rect);
if (!prgnNew)
{
Result = ERROR;
}
else
{
if (!dc->rosdc.hClipRgn)
{
dc->rosdc.hClipRgn = IntSysCreateRectRgn(0, 0, 0, 0);
prgnClip = REGION_LockRgn(dc->rosdc.hClipRgn);
IntGdiCombineRgn(prgnClip, dc->prgnVis, prgnNew, RGN_DIFF);
REGION_UnlockRgn(prgnClip);
Result = SIMPLEREGION;
}
else
{
prgnClip = REGION_LockRgn(dc->rosdc.hClipRgn);
Result = IntGdiCombineRgn(prgnClip, prgnClip, prgnNew, RGN_DIFF);
REGION_UnlockRgn(prgnClip);
}
REGION_Delete(prgnNew);
}
if (Result != ERROR)
CLIPPING_UpdateGCRegion(dc);
DC_UnlockDc(dc);
return Result;
}
int
FASTCALL
IntGdiExtSelectClipRgn(
PDC dc,
PREGION prgn,
int fnMode)
{
if (fnMode == RGN_COPY)
{
if (!prgn)
{
if (dc->dclevel.prgnClip != NULL)
{
REGION_Delete(dc->dclevel.prgnClip);
dc->dclevel.prgnClip = NULL;
dc->fs |= DC_FLAG_DIRTY_RAO;
}
return SIMPLEREGION;
}
if (!dc->dclevel.prgnClip)
dc->dclevel.prgnClip = IntSysCreateRectpRgn(0, 0, 0, 0);
dc->fs |= DC_FLAG_DIRTY_RAO;
return IntGdiCombineRgn(dc->dclevel.prgnClip, prgn, NULL, RGN_COPY);
}
ASSERT(prgn != NULL);
if (!dc->dclevel.prgnClip)
{
RECTL rect;
REGION_GetRgnBox(dc->prgnVis, &rect);
dc->dclevel.prgnClip = IntSysCreateRectpRgnIndirect(&rect);
}
dc->fs |= DC_FLAG_DIRTY_RAO;
return IntGdiCombineRgn(dc->dclevel.prgnClip, dc->dclevel.prgnClip, prgn, fnMode);
}
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
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);
}
}
