INT FASTCALL
GdiSelectVisRgn(HDC hdc, HRGN hrgn)
{
int retval;
DC *dc;
PREGION prgn;
if (!hrgn)
{
EngSetLastError(ERROR_INVALID_PARAMETER);
return ERROR;
}
if (!(dc = DC_LockDc(hdc)))
{
EngSetLastError(ERROR_INVALID_HANDLE);
return ERROR;
}
dc->fs &= ~DC_FLAG_DIRTY_RAO;
ASSERT (dc->prgnVis != NULL);
prgn = RGNOBJAPI_Lock(hrgn, NULL);
retval = prgn ? IntGdiCombineRgn(dc->prgnVis, prgn, NULL, RGN_COPY) : ERROR;
RGNOBJAPI_Unlock(prgn);
if ( retval != ERROR )
{
IntGdiOffsetRgn(dc->prgnVis, -dc->ptlDCOrig.x, -dc->ptlDCOrig.y);
CLIPPING_UpdateGCRegion(dc);
}
DC_UnlockDc(dc);
return retval;
}
INT FASTCALL
NEW_CLIPPING_UpdateGCRegion(PDC pDC)
{
CLIPOBJ * co;
/* Must have VisRgn set to a valid state! */
ASSERT (pDC->prgnVis);
if (pDC->prgnAPI)
{
REGION_Delete(pDC->prgnAPI);
pDC->prgnAPI = IntSysCreateRectpRgn(0,0,0,0);
}
if (pDC->prgnRao)
{
REGION_Delete(pDC->prgnRao);
pDC->prgnRao = IntSysCreateRectpRgn(0,0,0,0);
}
if (pDC->dclevel.prgnMeta && pDC->dclevel.prgnClip)
{
IntGdiCombineRgn( pDC->prgnAPI,
pDC->dclevel.prgnClip,
pDC->dclevel.prgnMeta,
RGN_AND);
}
else
{
if (pDC->dclevel.prgnClip)
{
IntGdiCombineRgn( pDC->prgnAPI,
pDC->dclevel.prgnClip,
NULL,
RGN_COPY);
}
else if (pDC->dclevel.prgnMeta)
{
IntGdiCombineRgn( pDC->prgnAPI,
pDC->dclevel.prgnMeta,
NULL,
RGN_COPY);
}
}
IntGdiCombineRgn( pDC->prgnRao,
pDC->prgnVis,
pDC->prgnAPI,
RGN_AND);
RtlCopyMemory(&pDC->erclClip,
&((PROSRGNDATA)pDC->prgnRao)->rdh.rcBound,
sizeof(RECTL));
pDC->fs &= ~DC_FLAG_DIRTY_RAO;
IntGdiOffsetRgn(pDC->prgnRao, pDC->ptlDCOrig.x, pDC->ptlDCOrig.y);
// pDC->co should be used. Example, CLIPOBJ_cEnumStart uses XCLIPOBJ to build
// the rects from region objects rects in pClipRgn->Buffer.
// With pDC->co.pClipRgn->Buffer,
// pDC->co.pClipRgn = pDC->prgnRao ? pDC->prgnRao : pDC->prgnVis;
co = IntEngCreateClipRegion( ((PROSRGNDATA)pDC->prgnRao)->rdh.nCount,
((PROSRGNDATA)pDC->prgnRao)->Buffer,
&pDC->erclClip);
if (co)
{
if (pDC->rosdc.CombinedClip != NULL)
IntEngDeleteClipRegion(pDC->rosdc.CombinedClip);
pDC->rosdc.CombinedClip = co;
}
return IntGdiOffsetRgn(pDC->prgnRao, -pDC->ptlDCOrig.x, -pDC->ptlDCOrig.y);
}
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)
{
IntGdiOffsetRgn(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);
}
}
}
